/* ===== 通用工具類別 ===== */
.hidden {
    display: none !important;
}

/* ===== ?典?霈??閮?===== */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);

    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --primary-darker: #4c51bf;
    --secondary-color: #a78bfa;
    --accent-color: #f56565;
    --success-color: #48bb78;
    --warning-color: #ff9800;

    --bg-color: #f8faff;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;

    --shadow-sm: 0 2px 10px rgba(102, 126, 234, 0.1);
    --shadow-md: 0 10px 25px -5px rgba(102, 126, 234, 0.15);
    --shadow-lg: 0 20px 40px -10px rgba(102, 126, 234, 0.2);

    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

/* ===== 頂部導航列 ===== */
.header {
    background: var(--primary-gradient);
    background: radial-gradient(circle at top left, rgba(118, 75, 162, 0.8), transparent),
        radial-gradient(circle at bottom right, rgba(102, 126, 234, 0.8), transparent),
        var(--primary-gradient);
    color: white;
    padding: 1.25rem 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1), inset 0 -1px 0 rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    overflow: hidden;
}

.header::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: headerGlow 10s infinite alternate linear;
    pointer-events: none;
    z-index: 0;
}

@keyframes headerGlow {
    from {
        transform: translate(-10%, -10%);
    }

    to {
        transform: translate(10%, 10%);
    }
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    position: relative;
}

.btn-back {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
    backdrop-filter: blur(4px);
    text-decoration: none;
    z-index: 2;
}

.btn-back:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateX(-2px);
}

.header-title {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: 1.5px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.4),
        0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 1;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    animation: titlePulseGlow 4s infinite alternate ease-in-out;
}

@keyframes titlePulseGlow {
    0% {
        transform: translateX(-50%) scale(1);
        text-shadow: 0 0 15px rgba(255, 255, 255, 0.3), 0 4px 10px rgba(0, 0, 0, 0.2);
    }

    100% {
        transform: translateX(-50%) scale(1.01);
        text-shadow: 0 0 25px rgba(255, 255, 255, 0.5), 0 4px 15px rgba(0, 0, 0, 0.3);
    }
}

.header-title:hover {
    transform: translateX(-50%) scale(1.02);
    text-shadow: 0 0 30px rgba(255, 255, 255, 0.6),
        0 4px 20px rgba(0, 0, 0, 0.3);
}

.header-title .title-sub {
    opacity: 1;
    font-weight: 600;
    font-size: 1.1rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 6px 16px;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-left: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.header-title svg {
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.btn-admin {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
    backdrop-filter: blur(4px);
    z-index: 2;
}

.btn-admin:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: white;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

.btn-dashboard {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: white;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    backdrop-filter: blur(4px);
    z-index: 2;
}

.btn-dashboard:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: white;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}


.control-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    margin-bottom: 2rem;
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
}

.control-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.control-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.25rem;
    position: relative;
    z-index: 1;
}

.btn-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    /* 讓按鈕群組佔滿剩餘空間，利於對齊 */
    min-width: 200px;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: white;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
}

.control-group:hover,
.control-group:focus-within {
    transform: translateY(-2px);
    border-color: var(--primary-color);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.12);
}

.control-group label {
    font-weight: 600;
    color: var(--primary-dark);
    white-space: nowrap;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.date-input {
    padding: 0.6rem 1rem;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    background: white;
    transition: var(--transition-fast);
    min-width: 150px;
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.date-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.date-separator {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.2rem;
}

.room-select {
    padding: 0.6rem 2.5rem 0.6rem 1rem;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    background: white;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23667eea' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    transition: var(--transition-fast);
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    min-width: 120px;
}

.room-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}


.btn-search,
.btn-export,
.btn-stats,
.btn-history {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: white;
    border: none;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
    /* 防止文字換行 */
}

.btn-search {
    background: var(--primary-gradient);
}

.btn-export {
    background: #48bb78;
}

.btn-stats {
    background: #9b4dca;
}

.btn-history {
    background: #6b46c1;
}

.btn-search:hover,
.btn-export:hover,
.btn-stats:hover,
.btn-history:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    filter: brightness(1.1);
}

.btn-search:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-search:active {
    transform: translateY(0);
}

.date-hint {
    margin-top: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ===== ?望?撠 ===== */
.calendar-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.btn-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    color: var(--primary-color);
    transition: var(--transition-fast);
}

.btn-nav:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.current-week {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 220px;
    text-align: center;
}

/* ===== ?望?蝬脫 ===== */
.calendar-container {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    overflow-x: auto;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(140px, 1fr));
    gap: 2px;
    background: var(--border-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    min-width: 980px;
}

/* ?交?甈? */
.calendar-day {
    background: var(--card-bg);
    min-height: 200px;
    display: flex;
    flex-direction: column;
}

.calendar-day.weekend {
    background: #fafafa;
}

.calendar-day.today {
    background: linear-gradient(135deg, rgba(74, 158, 187, 0.08) 0%, rgba(92, 184, 214, 0.05) 100%);
}

.day-header {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
}

.day-date {
    font-weight: 600;
    color: var(--text-primary);
}

.day-date .weekday {
    font-weight: 400;
    color: var(--text-secondary);
    margin-left: 0.25rem;
}

.day-header.weekend .day-date {
    color: var(--accent-color);
}

/* 預約按鈕 - 優化版 */
.btn-book {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    font-size: 0.9rem;
    color: white;
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    padding: 0.5rem 1rem;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.35);
    transition: all 0.2s ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn-book::before {
    content: '+';
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1;
}

.btn-book:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.5);
}

.btn-book:active {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 2px 6px rgba(102, 126, 234, 0.3);
}

/* 預約卡片區域 */
.day-bookings {
    flex: 1;
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    overflow-y: auto;
    max-height: 300px;
}

.booking-card {
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--primary-color);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-fast);
    cursor: pointer;
}

.booking-card:hover {
    background: linear-gradient(135deg, #ede9fe 0%, #ddd6fe 100%);
    transform: translateX(2px);
}

.booking-period {
    font-weight: 600;
    color: var(--text-primary);
}

.booking-name {
    color: var(--text-secondary);
    font-weight: 500;
}

/* ===== ??敶? ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(26, 58, 74, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px) scale(0.95);
    transition: var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: translateY(0) scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
}

.btn-cancel,
.btn-submit {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-cancel {
    background: #f5f5f5;
    border: 1px solid #ddd;
    color: var(--text-secondary);
}

.btn-cancel:hover {
    background: #e5e5e5;
}

.btn-submit {
    background: var(--primary-gradient);
    border: none;
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    max-height: calc(90vh - 80px);
}

.modal-info {
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
}

.info-row {
    display: flex;
    gap: 2rem;
}

.info-label {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.info-value {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.form-label {
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
}

.form-label.required {
    color: var(--accent-color);
}

.form-value {
    color: var(--text-primary);
    font-weight: 500;
}

.form-input {
    padding: 0.6rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    flex: 1;
    max-width: 250px;
    transition: var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 158, 187, 0.2);
}

.form-input:disabled {
    background: #f5f5f5;
    cursor: not-allowed;
}

/* 驗證錯誤高亮與震動 */
.invalid-shake {
    border-color: var(--accent-color) !important;
    box-shadow: 0 0 0 4px rgba(245, 101, 101, 0.25) !important;
    animation: shake 0.5s cubic-bezier(.36, .07, .19, .97) both;
}

@keyframes shake {

    10%,
    90% {
        transform: translate3d(-1px, 0, 0);
    }

    20%,
    80% {
        transform: translate3d(2px, 0, 0);
    }

    30%,
    50%,
    70% {
        transform: translate3d(-4px, 0, 0);
    }

    40%,
    60% {
        transform: translate3d(4px, 0, 0);
    }
}

.form-textarea {
    width: 100%;
    min-height: 100px;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    resize: vertical;
    transition: var(--transition-fast);
}

.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 158, 187, 0.2);
}

/* 蝭€甈⊿??*/
.period-checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.period-checkbox {
    position: relative;
}

.period-checkbox input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.period-checkbox label {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.75rem;
    background: #f5f5f5;
    border: 2px solid #e0e0e0;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.period-checkbox input:checked+label {
    background: linear-gradient(135deg, #ede9fe 0%, #ddd6fe 100%);
    border-color: var(--primary-color);
    color: var(--primary-dark);
}

.period-checkbox input:disabled+label {
    background: #f0f0f0;
    border-color: #ccc;
    color: #aaa;
    cursor: not-allowed;
    text-decoration: line-through;
}

.period-checkbox.unavailable label {
    background: #f1f5f9;
    color: #94a3b8;
    border-style: dashed;
    opacity: 0.8;
}

.period-checkbox.unavailable .lock-icon {
    font-size: 0.8rem;
    margin-left: 2px;
    filter: grayscale(1);
}

.period-checkbox label:hover:not(:has(input:disabled)) {
    border-color: var(--primary-color);
}

/* ???? */
.repeat-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.5rem;
    padding: 1rem;
    background: #fafafa;
    border-radius: var(--radius-sm);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 500;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.repeat-info {
    color: var(--text-secondary);
}

.repeat-end {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.repeat-end label {
    color: var(--text-secondary);
    white-space: nowrap;
}

/* ===== Toast ? ===== */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    background: linear-gradient(135deg, #4caf50 0%, #388e3c 100%);
}

.toast.error {
    background: linear-gradient(135deg, #f44336 0%, #d32f2f 100%);
}

.toast.warning {
    background: linear-gradient(135deg, #ff9800 0%, #f57c00 100%);
}

/* ===== RWD 響應式設計 ===== */
@media (max-width: 1024px) {
    .control-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .control-group {
        flex-wrap: wrap;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 0.75rem 1rem;
    }

    .header-content {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 0;
        position: relative;
    }

    .header-title {
        font-size: 1.1rem;
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        width: max-content;
        margin: 0;
    }

    .desktop-text,
    #adminLoginText {
        display: none;
    }

    .btn-back,
    .btn-admin {
        padding: 0.5rem;
        background: transparent;
        border: none;
        box-shadow: none;
    }

    .btn-back:hover,
    .btn-admin:hover {
        background: rgba(255, 255, 255, 0.1);
        transform: none;
    }

    .main-content {
        padding: 1rem;
    }

    .calendar-container {
        padding: 1rem;
    }

    .modal {
        width: 95%;
        max-height: 95vh;
    }

    .modal-body {
        padding: 1rem;
    }

    .period-checkboxes {
        gap: 0.5rem;
    }

    .period-checkbox label {
        padding: 0.4rem 0.6rem;
        font-size: 0.85rem;
    }

    .repeat-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
}

/* ===== 匯出按鈕 ===== */
.btn-export {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #4caf50 0%, #388e3c 100%);
    color: white;
    border: none;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.btn-export:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-export:active {
    transform: translateY(0);
}

/* ===== 密碼驗證彈窗 ===== */
.password-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(26, 58, 74, 0.6);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.password-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.password-modal {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 400px;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px) scale(0.95);
    transition: var(--transition-normal);
    text-align: center;
}

.password-modal-overlay.active .password-modal {
    transform: translateY(0) scale(1);
}

.password-modal-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.password-modal-header h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.password-modal-desc {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.password-booking-info {
    background: linear-gradient(135deg, #fff5f5 0%, #fee5e5 100%);
    border: 1px solid #ffcccc;
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    margin-bottom: 1.25rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    text-align: left;
}

.password-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    text-align: center;
    transition: var(--transition-fast);
}

.password-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 158, 187, 0.2);
}

.password-error {
    color: var(--accent-color);
    font-size: 0.85rem;
    margin-top: 0.5rem;
    min-height: 1.2rem;
}

.password-modal-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn-password-cancel,
.btn-password-confirm {
    flex: 1;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-password-cancel {
    background: #f5f5f5;
    border: 1px solid #ddd;
    color: var(--text-secondary);
}

.btn-password-cancel:hover {
    background: #e5e5e5;
}

.btn-password-confirm {
    background: linear-gradient(135deg, #f44336 0%, #d32f2f 100%);
    border: none;
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-password-confirm:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== 管理員登入按鈕 ===== */
.btn-admin {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
    backdrop-filter: blur(4px);
    margin-left: auto;
}

.btn-admin:hover {
    background: rgba(255, 255, 255, 0.3);
}

.btn-admin.logged-in {
    background: rgba(76, 175, 80, 0.3);
    border-color: rgba(76, 175, 80, 0.5);
}

/* ===== 視圖切換按鈕 ===== */
.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.view-toggle {
    display: flex;
    background: var(--bg-color);
    border-radius: var(--radius-sm);
    padding: 4px;
    border: 1px solid var(--border-color);
}

.view-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.view-btn:hover {
    color: var(--primary-color);
}

.view-btn.active {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* ===== 月曆視圖 ===== */
.month-calendar {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.month-calendar-header {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    border-bottom: 1px solid var(--border-color);
}

.month-weekday {
    padding: 0.75rem;
    text-align: center;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.month-weekday:first-child,
.month-weekday:last-child {
    color: var(--accent-color);
}

.month-calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    background: var(--border-color);
    /* 透過背景色產生統一格線 */
    gap: 1px;
}

.month-day {
    min-height: 100px;
    padding: 0.25rem;
    cursor: pointer;
    transition: var(--transition-fast);
    background: var(--card-bg);
    /* 單元格色彩 */
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    position: relative;
}

/* 移除舊有的 nth-child 邊框處理，改用容器 gap 控制 */

.month-day:hover {
    background: linear-gradient(135deg, rgba(74, 158, 187, 0.08) 0%, rgba(92, 184, 214, 0.05) 100%);
}

.month-day.other-month {
    background: #fafafa;
    color: var(--text-muted);
}

.month-day.today {
    background: linear-gradient(135deg, rgba(74, 158, 187, 0.15) 0%, rgba(92, 184, 214, 0.1) 100%);
}

.month-day.weekend {
    background: #fffafa;
}

.month-day-header {
    display: flex;
    justify-content: flex-end;
    padding: 0 0.25rem;
}

.month-day-date {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.month-day.weekend .month-day-date,
.month-day.other-month.weekend .month-day-date {
    color: var(--accent-color);
}

.month-day.other-month .month-day-date {
    color: var(--text-muted);
}

.month-day-bookings {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
}

.month-booking-item {
    display: flex;
    align-items: center;
    gap: 4px;
    background: rgba(102, 126, 234, 0.1);
    border-left: 2px solid var(--primary-color);
    padding: 2px 4px;
    border-radius: 2px;
    font-size: 0.75rem;
    overflow: hidden;
}

.mb-period {
    background: var(--primary-color);
    color: white;
    padding: 0 4px;
    border-radius: 2px;
    font-weight: 700;
    font-size: 0.7rem;
    min-width: 16px;
    text-align: center;
}

.mb-booker {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-secondary);
    font-weight: 500;
}

.month-booking-more {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    padding: 2px 0;
    background: rgba(0, 0, 0, 0.03);
    border-radius: 2px;
}

/* ===== 登入彈窗 ===== */
.auth-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(26, 58, 74, 0.6);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.auth-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.auth-modal {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 400px;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px) scale(0.95);
    transition: var(--transition-normal);
    text-align: center;
}

.auth-modal-overlay.active .auth-modal {
    transform: translateY(0) scale(1);
}

.auth-modal-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.auth-modal-header h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.auth-modal-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.auth-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    margin-bottom: 0.75rem;
    transition: var(--transition-fast);
}

.auth-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 158, 187, 0.2);
}

.auth-error {
    color: var(--accent-color);
    font-size: 0.85rem;
    min-height: 1.2rem;
    margin-bottom: 0.5rem;
}

.auth-modal-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.btn-auth-cancel,
.btn-auth-confirm {
    flex: 1;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-auth-cancel {
    background: #f5f5f5;
    border: 1px solid #ddd;
    color: var(--text-secondary);
}

.btn-auth-cancel:hover {
    background: #e5e5e5;
}

.btn-auth-confirm {
    background: var(--primary-gradient);
    border: none;
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-auth-confirm:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== 刪除確認彈窗 ===== */
.delete-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(26, 58, 74, 0.6);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.delete-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.delete-modal {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 400px;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px) scale(0.95);
    transition: var(--transition-normal);
    text-align: center;
}

.delete-modal-overlay.active .delete-modal {
    transform: translateY(0) scale(1);
}

.delete-modal-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.delete-modal-header h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.delete-booking-info {
    background: linear-gradient(135deg, #fff5f5 0%, #fee5e5 100%);
    border: 1px solid #ffcccc;
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    margin-bottom: 1.25rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    text-align: left;
}

.delete-modal-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.btn-delete-cancel,
.btn-delete-confirm {
    flex: 1;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-delete-cancel {
    background: #f5f5f5;
    border: 1px solid #ddd;
    color: var(--text-secondary);
}

.btn-delete-cancel:hover {
    background: #e5e5e5;
}

.btn-delete-confirm {
    background: linear-gradient(135deg, #f44336 0%, #d32f2f 100%);
    border: none;
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-delete-confirm:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== 月曆 RWD ===== */
@media (max-width: 768px) {
    .calendar-header {
        flex-direction: column;
        gap: 0.75rem;
    }

    .month-day {
        min-height: 80px;
        /* 增加手機端高度，確保內容不擠壓 */
        padding: 0.25rem;
    }

    .month-day-date {
        font-size: 0.9rem;
    }

    .month-weekday {
        padding: 0.5rem 0;
        font-size: 0.85rem;
    }

    .booking-dot {
        width: 6px;
        height: 6px;
    }

    .auth-modal,
    .delete-modal {
        padding: 1.5rem;
    }
}

/* ===== 統計按鈕 ===== */
.btn-stats {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: linear-gradient(135deg, #9c27b0 0%, #7b1fa2 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.btn-stats:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== 統計彈窗 ===== */
/* ===== 統計彈窗 (Bento Grid + Glassmorphism) ===== */
.stats-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 1.5rem;
}

.stats-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.stats-modal {
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 24px;
    width: 100%;
    max-width: 1000px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow:
        0 8px 32px 0 rgba(31, 38, 135, 0.2),
        inset 0 0 0 1px rgba(255, 255, 255, 0.2);
    transform: translateY(30px) scale(0.98);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.stats-modal-overlay.active .stats-modal {
    transform: translateY(0) scale(1);
}

.stats-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    background: rgba(255, 255, 255, 0.5);
    position: sticky;
    top: 0;
    z-index: 10;
}

.stats-modal-header h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.btn-stats-close {
    background: rgba(0, 0, 0, 0.05);
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.btn-stats-close:hover {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    transform: rotate(90deg);
}

.stats-modal-body {
    padding: 1.5rem 2rem 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Bento Grid 佈局 */
.stats-row {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1.5rem;
}

.stats-card {
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stats-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
}

.stats-card.pie-box {
    grid-column: span 5;
    display: flex;
    flex-direction: column;
}

.stats-card.bar-box {
    grid-column: span 7;
}

.stats-card.trend-box {
    grid-column: span 12;
}

.stats-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    opacity: 0.9;
}

/* 圖表樣式優化 */
.pie-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    flex: 1;
}

.stats-pie-chart {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    position: relative;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.stats-pie-chart::after {
    content: '';
    position: absolute;
    inset: 40px;
    background: white;
    border-radius: 50%;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.pie-legend {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.6rem;
}

.pie-legend-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    background: #f8fafc;
    border-radius: 12px;
    font-size: 0.9rem;
    transition: background 0.2s ease;
}

.pie-legend-item:hover {
    background: #f1f5f9;
}

.pie-legend-color {
    width: 10px;
    height: 10px;
    border-radius: 3px;
    flex-shrink: 0;
}

.pie-legend-name {
    flex: 1;
    color: var(--text-secondary);
    font-weight: 500;
}

.pie-legend-value {
    font-weight: 700;
    color: var(--primary-color);
}

.stats-bar-chart {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.bar-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.bar-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bar-label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.bar-value {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 600;
}

.bar-container {
    height: 12px;
    background: #f1f5f9;
    border-radius: 10px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    border-radius: 10px;
    width: 0;
    transition: width 1s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
}

.bar-fill::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.stats-trend-chart {
    height: 180px;
    display: flex;
    align-items: flex-end;
    gap: 6px;
    padding: 1rem 0;
}

.trend-bar {
    flex: 1;
    background: var(--primary-gradient);
    border-radius: 4px 4px 0 0;
    transition: height 1s ease, opacity 0.3s ease;
    cursor: help;
    opacity: 0.7;
    min-height: 4px;
}

.trend-bar:hover {
    opacity: 1;
    filter: brightness(1.1);
}

.stats-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.summary-card {
    background: white;
    padding: 1.5rem;
    border-radius: 20px;
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: transform 0.3s ease;
}

.summary-card:hover {
    transform: translateY(-4px);
}

.summary-value {
    font-size: 2.25rem;
    font-weight: 900;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}

.summary-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
}


/* ===== 全局 RWD 手機版優化 (max-width: 600px) ===== */
@media (max-width: 600px) {

    /* ===== Header 優化 ===== */
    .header {
        padding: 1rem 1rem 1.25rem;
        border-bottom-left-radius: 20px;
        border-bottom-right-radius: 20px;
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    }

    .header-content {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }

    .btn-back {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }

    .btn-back svg {
        width: 16px;
        height: 16px;
    }

    .header-title {
        font-size: 1.1rem;
        gap: 0.25rem;
        order: -1;
        width: 100%;
        justify-content: center;
        margin-bottom: 0;
        position: relative;
        left: 0;
        transform: none !important;
        /* 強制覆寫桌面端的居中偏置 */
        white-space: normal;
        flex-direction: column;
        text-align: center;
        line-height: 1.2;
        transition: transform 0.3s ease;
        animation: titlePulseGlowMobile 4s infinite alternate ease-in-out;
    }

    @keyframes titlePulseGlowMobile {
        0% {
            transform: scale(1);
            text-shadow: 0 0 15px rgba(255, 255, 255, 0.3), 0 4px 10px rgba(0, 0, 0, 0.2);
        }

        100% {
            transform: scale(1.03);
            text-shadow: 0 0 25px rgba(255, 255, 255, 0.5), 0 4px 15px rgba(0, 0, 0, 0.3);
        }
    }

    .header-title:hover {
        transform: scale(1.05) !important;
    }

    .header-title svg {
        margin-bottom: 0.25rem;
        width: 24px;
        height: 24px;
        opacity: 0.9;
    }

    .header-title .title-main {
        display: block;
        font-size: 1.25rem;
        font-weight: 800;
        letter-spacing: 0.5px;
        margin-bottom: 0.25rem;
    }

    .header-title .title-sub {
        display: inline-block;
        font-size: 0.95rem;
        margin-left: 0;
        background: rgba(255, 255, 255, 0.25);
        padding: 4px 18px;
        border-radius: 50px;
        border: 1px solid rgba(255, 255, 255, 0.3);
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    }

    .header-title svg {
        width: 20px;
        height: 20px;
    }

    .btn-admin {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }

    /* ===== 控制面板優化 ===== */
    .control-panel {
        padding: 1rem;
    }

    .control-row {
        flex-direction: column;
        gap: 0.75rem;
    }

    .control-group {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
    }

    .control-group label {
        margin-bottom: 0.25rem;
        font-size: 0.85rem;
    }

    .date-input,
    .room-select {
        width: 100%;
        padding: 0.6rem;
        font-size: 0.9rem;
    }

    .date-separator {
        text-align: center;
        margin: 0.25rem 0;
    }

    .btn-search,
    .btn-export,
    .btn-stats {
        width: 100%;
        justify-content: center;
        padding: 0.75rem;
        font-size: 0.9rem;
    }

    .date-hint {
        font-size: 0.75rem;
        text-align: center;
    }

    /* ===== 日曆區域優化 ===== */
    .calendar-container {
        padding: 1rem;
    }

    .calendar-header {
        flex-direction: column;
        gap: 0.75rem;
    }

    .calendar-nav {
        width: 100%;
        justify-content: space-between;
    }

    .current-week {
        font-size: 0.9rem;
    }


    .day-header {
        padding: 0.5rem;
    }

    .day-date {
        font-size: 0.85rem;
    }

    .weekday {
        font-size: 0.75rem;
    }

    .btn-book {
        padding: 0.35rem 0.6rem;
        font-size: 0.75rem;
    }

    .booking-card {
        padding: 0.4rem;
    }

    .booking-period {
        font-size: 0.7rem;
    }

    .booking-name {
        font-size: 0.75rem;
    }

    /* ===== 月曆視圖優化 ===== */
    .month-weekday {
        padding: 0.5rem 0;
        font-size: 0.85rem;
        display: flex;
        align-items: center;
        justify-content: center;
        min-width: 0;
        /* 防止擠壓 */
    }

    .month-calendar-header,
    .month-calendar-grid {
        gap: 1px;
        /* 確保標題與網格間隙一致 */
    }

    .month-day {
        min-height: 70px;
        padding: 0.2rem;
    }

    .month-day-date {
        font-size: 0.85rem;
    }

    .month-booking-item {
        padding: 1px 2px;
        font-size: 0.7rem;
    }

    .mb-period {
        min-width: 14px;
        padding: 0 2px;
        font-size: 0.65rem;
    }

    .booking-count {
        font-size: 0.65rem;
        padding: 0.1rem 0.25rem;
    }

    /* ===== 預約彈窗優化 ===== */
    .modal {
        width: 95%;
        max-height: 90vh;
        border-radius: var(--radius-md);
    }

    .modal-header {
        padding: 0.75rem 1rem;
    }

    .btn-cancel,
    .btn-submit {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
    }

    .modal-body {
        padding: 1rem;
    }

    .form-label {
        font-size: 0.85rem;
    }

    .form-input,
    .form-textarea {
        padding: 0.6rem;
        font-size: 0.9rem;
    }

    .period-checkboxes {
        gap: 0.4rem;
    }

    .period-checkbox {
        padding: 0.5rem;
    }

    .period-checkbox label {
        font-size: 0.8rem;
    }

    /* ===== 登入/刪除/統計彈窗優化 ===== */
    .auth-modal,
    .delete-modal,
    .stats-modal {
        width: 95%;
        margin: 1rem;
        max-height: 90vh;
    }

    .auth-modal-header h3,
    .delete-modal-header h3 {
        font-size: 1.1rem;
    }

    .auth-input {
        padding: 0.6rem;
        font-size: 0.9rem;
    }

    .btn-auth-cancel,
    .btn-auth-confirm,
    .btn-delete-cancel,
    .btn-delete-confirm {
        padding: 0.6rem;
        font-size: 0.9rem;
    }

    /* ===== 統計彈窗優化 ===== */
    .stats-modal-header {
        padding: 1rem;
    }

    .stats-modal-header h3 {
        font-size: 1rem;
    }

    .stats-modal-body {
        padding: 1rem;
    }

    .stats-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .stats-card {
        padding: 1rem;
    }

    /* 週曆改為直向排列，移除最小寬度限制 */
    .calendar-grid {
        display: flex !important;
        flex-direction: column;
        gap: 0.5rem;
        overflow-x: visible;
        min-width: auto !important;
        width: 100%;
        border: none;
        background: transparent;
        border-radius: 0;
    }

    .calendar-day {
        min-width: auto !important;
        width: 100% !important;
        max-width: 100% !important;
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
        min-height: auto;
    }

    .day-header {
        padding: 0.75rem 1rem;
        border-radius: var(--radius-md) var(--radius-md) 0 0;
    }

    .day-date {
        font-size: 1rem;
    }

    .weekday {
        font-size: 0.85rem;
    }

    .day-bookings {
        padding: 0.75rem;
    }

    .booking-card {
        padding: 0.6rem;
        margin-bottom: 0.5rem;
    }

    .booking-period {
        font-size: 0.8rem;
    }

    .booking-name {
        font-size: 0.9rem;
    }

    /* 確保今天的樣式更明顯 */
    .calendar-day.today {
        border: 2px solid var(--primary-color);
    }

    /* 週末樣式調整 */
    .calendar-day.weekend {
        background: linear-gradient(135deg, #fff8f8 0%, #fff0f0 100%);
    }

    /* 隱藏 header 中的預約按鈕 */
    .day-header .btn-book {
        display: none !important;
    }

    /* 顯示底部預約按鈕 */
    .day-footer {
        display: block;
        padding: 0.75rem;
        border-top: 1px dashed var(--border-color);
    }

    .btn-book-mobile {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        padding: 0.75rem 1rem;
        background: var(--primary-gradient);
        border: none;
        border-radius: var(--radius-md);
        color: white;
        font-size: 1rem;
        font-weight: 600;
        cursor: pointer;
        box-shadow: var(--shadow-sm);
        transition: var(--transition-fast);
    }

    .btn-book-mobile:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }

    .btn-book-mobile:active {
        transform: translateY(0);
    }
}


/* ===== 手機端底部預約按鈕 ===== */
/* 預設隱藏（桌面端） */
.day-footer {
    display: none;
}

/* 手機端顯示預約按鈕 */
@media (max-width: 600px) {
    .day-footer {
        display: block !important;
        padding: 0.5rem 0.75rem 0.75rem;
        border-top: none;
        background: transparent;
    }

    .btn-book-mobile {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        padding: 0.85rem 1rem;
        background: var(--primary-gradient);
        border: none;
        border-radius: var(--radius-md);
        color: white;
        font-size: 1rem;
        font-weight: 600;
        cursor: pointer;
        box-shadow: var(--shadow-sm);
        transition: var(--transition-fast);
    }

    .btn-book-mobile:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }

    .period-checkbox label {
        font-size: 0.8rem;
    }

    /* ===== 登入/刪除/統計彈窗優化 ===== */
    .auth-modal,
    .delete-modal,
    /* ===== 統計彈窗優化 ===== */
    .stats-modal {
        max-height: 95vh;
        border-radius: 20px;
    }

    .stats-modal-header {
        padding: 1rem 1.25rem;
    }

    .stats-modal-header h3 {
        font-size: 1.25rem;
    }

    .stats-modal-body {
        padding: 1.25rem;
        gap: 1rem;
    }

    .stats-row {
        grid-template-columns: repeat(1, 1fr);
        gap: 1rem;
    }

    .stats-card.pie-box,
    .stats-card.bar-box,
    .stats-card.trend-box {
        grid-column: span 1;
    }

    .stats-card {
        padding: 1.25rem;
    }

    .stats-pie-chart {
        width: 150px;
        height: 150px;
    }

    .stats-pie-chart::after {
        inset: 35px;
    }

    .stats-trend-chart {
        height: 140px;
        gap: 3px;
    }

    .stats-summary {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .summary-card {
        padding: 1rem;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .summary-value {
        font-size: 1.5rem;
    }

    /* 週曆改為直向排列，移除最小寬度限制 */
    .calendar-grid {
        display: flex !important;
        flex-direction: column;
        gap: 0.5rem;
        overflow-x: visible;
        min-width: auto !important;
        width: 100%;
        border: none;
        background: transparent;
        border-radius: 0;
    }

    .calendar-day {
        min-width: auto !important;
        width: 100% !important;
        max-width: 100% !important;
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
        min-height: auto;
    }

    .day-header {
        padding: 0.75rem 1rem;
        border-radius: var(--radius-md) var(--radius-md) 0 0;
    }

    .day-date {
        font-size: 1rem;
    }

    .weekday {
        font-size: 0.85rem;
    }

    .day-bookings {
        padding: 0.75rem;
    }

    .booking-card {
        padding: 0.6rem;
        margin-bottom: 0.5rem;
    }

    .booking-period {
        font-size: 0.8rem;
    }

    .booking-name {
        font-size: 0.9rem;
    }

    /* 確保今天的樣式更明顯 */
    .calendar-day.today {
        border: 2px solid var(--primary-color);
    }

    /* 週末樣式調整 */
    .calendar-day.weekend {
        background: linear-gradient(135deg, #fff8f8 0%, #fff0f0 100%);
    }

    /* 隱藏 header 中的預約按鈕 */
    .day-header .btn-book {
        display: none !important;
    }

    /* 顯示底部預約按鈕 */
    .day-footer {
        display: block;
        padding: 0.75rem;
        border-top: 1px dashed var(--border-color);
    }

    .btn-book-mobile {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        padding: 0.75rem 1rem;
        background: var(--primary-gradient);
        border: none;
        border-radius: var(--radius-md);
        color: white;
        font-size: 1rem;
        font-weight: 600;
        cursor: pointer;
        box-shadow: var(--shadow-sm);
        transition: var(--transition-fast);
    }

    .btn-book-mobile:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }

    .btn-book-mobile:active {
        transform: translateY(0);
    }
}


/* ===== 手機端底部預約按鈕 ===== */
/* 預設隱藏（桌面端） */
.day-footer {
    display: none;
}

/* 手機端顯示預約按鈕 */
@media (max-width: 600px) {
    .day-footer {
        display: block !important;
        padding: 0.5rem 0.75rem 0.75rem;
        border-top: none;
        background: transparent;
    }

    .btn-book-mobile {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        padding: 0.85rem 1rem;
        background: var(--primary-gradient);
        border: none;
        border-radius: var(--radius-md);
        color: white;
        font-size: 1rem;
        font-weight: 600;
        cursor: pointer;
        box-shadow: var(--shadow-sm);
        transition: var(--transition-fast);
    }

    .btn-book-mobile:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }

    .btn-book-mobile:active {
        transform: translateY(0);
        box-shadow: var(--shadow-sm);
    }

    .btn-book-mobile svg {
        flex-shrink: 0;
    }
}

/* ===== 動畫與微互動 ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }

    100% {
        background-position: 200% 0;
    }
}

.fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}

/* 按鈕微互動 */
.btn-search:active,
.btn-export:active,
.btn-stats:active,
.btn-nav:active,
.btn-admin:active,
.btn-back:active,
.view-btn:active {
    transform: scale(0.95);
}

/* 彈窗動畫優化 */
.modal,
.auth-modal,
.stats-modal,
.delete-modal {
    animation: scaleIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== 骨架屏 (Skeleton Loading) ===== */
.skeleton {
    background: #f0f0f0;
    background-image: linear-gradient(90deg,
            #f0f0f0 25%,
            #e0e0e0 50%,
            #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
}

.skeleton-text {
    height: 1em;
    margin-bottom: 0.5rem;
    width: 80%;
}

.skeleton-text.short {
    width: 40%;
}

.skeleton-card {
    height: 80px;
    margin: 0.5rem;
    border-radius: var(--radius-sm);
}

.skeleton-cell {
    height: 100%;
    min-height: 120px;
    padding: 0.5rem;
}

/* ===== 進階搜尋功能 ===== */

/* 搜尋面板 */
.search-panel {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    padding: 1rem;
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

/* 搜尋輸入框容器 */
.search-input-wrapper {
    position: relative;
    flex: 1;
    min-width: 200px;
    max-width: 300px;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 0.6rem 2.5rem 0.6rem 2.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    background: white;
    transition: var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-clear-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    padding: 4px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.search-clear-btn:hover {
    background: rgba(0, 0, 0, 0.1);
    color: var(--text-primary);
}

/* 節次篩選下拉選單 */
.search-filter-select {
    padding: 0.6rem 2rem 0.6rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    background: white;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23667eea' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    transition: var(--transition-fast);
    min-width: 140px;
}

.search-filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* 進階搜尋按鈕 */
.btn-search-advanced {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.btn-search-advanced:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-search-advanced:active {
    transform: scale(0.95);
}

/* 搜尋結果彈窗 */
.search-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(26, 58, 74, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.search-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.search-modal {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px) scale(0.95);
    transition: var(--transition-normal);
    animation: scaleIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.search-modal-overlay.active .search-modal {
    transform: translateY(0) scale(1);
}

.search-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--primary-gradient);
    color: white;
}

.search-modal-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}

.btn-search-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: white;
    transition: var(--transition-fast);
}

.btn-search-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.search-modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    max-height: calc(80vh - 80px);
}

/* 搜尋結果摘要 */
.search-result-summary {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.search-result-summary .count {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.25rem;
}

/* 搜尋結果列表 */
.search-result-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.search-result-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    cursor: pointer;
}

.search-result-item:hover {
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    transform: translateX(4px);
}

.search-result-date {
    min-width: 100px;
    font-weight: 600;
    color: var(--text-primary);
}

.search-result-period {
    background: var(--primary-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
}

.search-result-booker {
    flex: 1;
    color: var(--text-secondary);
    font-weight: 500;
}

.search-result-reason {
    max-width: 200px;
    color: var(--text-muted);
    font-size: 0.9rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.search-no-result {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.search-no-result svg {
    margin-bottom: 1rem;
    opacity: 0.5;
}

.search-no-result p {
    font-size: 1.1rem;
}

/* 搜尋結果高亮 */
.search-highlight {
    background: linear-gradient(135deg, #fef08a 0%, #fde047 100%);
    padding: 0.1rem 0.25rem;
    border-radius: 2px;
}

/* RWD 響應式 - 搜尋面板 */
@media (max-width: 768px) {
    .search-panel {
        flex-direction: column;
        align-items: stretch;
    }

    .search-input-wrapper {
        max-width: none;
    }

    .search-filter-select {
        width: 100%;
    }

    .btn-search-advanced {
        width: 100%;
        justify-content: center;
    }

    .search-modal {
        width: 95%;
        max-height: 90vh;
    }

    .search-modal-body {
        padding: 1rem;
    }

    .search-result-item {
        flex-wrap: wrap;
    }

    .search-result-reason {
        max-width: none;
        width: 100%;
        margin-top: 0.5rem;
    }
}

/* ===== 不開放時段設定彈窗 ===== */
.settings-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1200;
    padding: 1rem;
}

.settings-modal-overlay.active {
    display: flex;
    animation: fadeIn var(--transition-normal);
}

.settings-modal {
    background: var(--card-bg);
    width: 100%;
    max-width: 900px;
    max-height: 90vh;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
    animation: scaleIn var(--transition-normal);
    overflow: hidden;
    /* 防止內容溢出圓角 */
}

.settings-modal-header {
    padding: 1.25rem 1.5rem;
    background: var(--primary-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.settings-modal-header h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
}

.btn-settings-close {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    opacity: 0.8;
    transition: var(--transition-fast);
}

.btn-settings-close:hover {
    opacity: 1;
    transform: rotate(90deg);
}

.settings-modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
    /* 重要：讓主體占滿剩餘空間，確保留下空間給頁尾 */
}

.settings-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.settings-table-container {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.settings-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    min-width: 600px;
}

.settings-table th,
.settings-table td {
    padding: 0.75rem;
    text-align: center;
    border: 1px solid var(--border-color);
}

.settings-table th {
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 600;
    position: sticky;
    top: 0;
}

.settings-table td:first-child {
    background: var(--bg-secondary);
    font-weight: 600;
    text-align: left;
}

.unavailable-check {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.settings-modal-footer {
    padding: 1rem 1.5rem;
    background: #f8fafc;
    display: flex;
    justify-content: flex-end;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.btn-settings-save {
    background: var(--success-color);
    /* 修正變數名 */
    color: white !important;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    transition: var(--transition-fast);
}

.btn-settings-save:hover {
    background: var(--success-color);
    filter: brightness(1.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(72, 187, 120, 0.3);
}

.btn-setting {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-setting:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(15deg);
}

.header-admin {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* ===== 日曆不開放狀態 ===== */
.month-day.unavailable,
.day-periods .period-item.unavailable {
    background-color: #f5f5f5 !important;
    cursor: not-allowed !important;
    position: relative;
    opacity: 0.8;
}

.period-item.unavailable {
    border-left: 4px solid #ccc !important;
    background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%) !important;
    pointer-events: none;
}

.unavailable-badge {
    background: #999;
    color: white;
    font-size: 0.65rem;
    padding: 1px 4px;
    border-radius: 4px;
    display: inline-block;
}

/* 手機端寬度適配 */
@media (max-width: 600px) {
    .settings-modal {
        max-height: 95vh;
    }

    .settings-table th,
    .settings-table td {
        padding: 0.5rem 0.25rem;
        font-size: 0.8rem;
    }
}

/* ===== 歷史記錄功能 ===== */

.btn-history {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    color: white;
    border: none;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.btn-history:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 歷史記錄彈窗 */
.history-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(26, 58, 74, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.history-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.history-modal {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 900px;
    max-height: 85vh;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    animation: scaleIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.history-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    color: white;
}

.history-modal-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}

.btn-history-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: white;
    transition: var(--transition-fast);
}

.btn-history-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.history-modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    max-height: calc(85vh - 80px);
}

.history-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: center;
}

.history-month-input {
    padding: 0.6rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
}

.btn-history-load {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-history-load:hover {
    transform: translateY(-2px);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    border: 1px solid var(--border-color);
    border-left: 4px solid #8b5cf6;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.history-item:hover {
    transform: translateX(4px);
}

.history-date {
    min-width: 100px;
    font-weight: 600;
    color: var(--text-primary);
}

.history-period {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.history-booker {
    flex: 1;
    color: var(--text-secondary);
    font-weight: 500;
}

.history-reason {
    max-width: 200px;
    color: var(--text-muted);
    font-size: 0.9rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ===== 批次預約功能 ===== */

.batch-booking-group {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
}

.batch-dates {
    margin-top: 1rem;
}

.batch-hint {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.batch-calendar {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 1rem;
}

.batch-calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition-fast);
    background: white;
}

.batch-calendar-day:hover {
    background: var(--bg-color);
}

.batch-calendar-day.selected {
    background: var(--primary-gradient);
    color: white;
    border-color: var(--primary-color);
}

.batch-calendar-day.disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.selected-dates {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.selected-date-tag {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    background: var(--primary-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.selected-date-tag button {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: 0;
    display: flex;
}

/* RWD 響應式 */
@media (max-width: 768px) {
    .history-modal {
        width: 95%;
        max-height: 90vh;
    }

    .history-filters {
        flex-direction: column;
    }

    .history-item {
        flex-wrap: wrap;
    }

    .history-reason {
        max-width: none;
        width: 100%;
        margin-top: 0.5rem;
    }
}

/* ===== 數據儀表板 (UI Optimized) ===== */

/* 新增配色變數 (Educational App Theme) */
:root {
    --dash-primary: #4F46E5;
    /* Indigo */
    --dash-primary-light: #EEF2FF;
    --dash-accent: #F97316;
    /* Orange */
    --dash-accent-light: #FFF7ED;
    --dash-success: #22C55E;
    --dash-success-light: #F0FDF4;
    --dash-danger: #EF4444;
    --dash-danger-light: #FEF2F2;
    --dash-bg: #F8FAFC;
    --dash-card-bg: #FFFFFF;
    --dash-text-main: #1E293B;
    --dash-text-sub: #64748B;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: 1px solid rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
}

.dashboard-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.4);
    /* 降低遮罩透明度，突顯 Modal */
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.dashboard-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.dashboard-modal {
    background: var(--dash-bg);
    border-radius: 24px;
    /* 更圓潤的角 */
    width: 95%;
    max-width: 1100px;
    max-height: 92vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    transform: scale(0.95);
    transition: var(--transition-normal);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.dashboard-modal-overlay.active .dashboard-modal {
    transform: scale(1);
}

.dashboard-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
    background: white;
    border-bottom: 1px solid var(--border-color);
}

.dashboard-modal-header h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    color: var(--dash-text-main);
    font-weight: 800;
    letter-spacing: -0.025em;
}

.btn-dashboard-close {
    background: transparent;
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.btn-dashboard-close:hover {
    background: #f1f5f9;
    color: var(--text-primary);
    transform: rotate(90deg);
}

.dashboard-modal-body {
    padding: 2rem;
    overflow-y: auto;
    flex: 1;
    background: var(--dash-bg);
}

/* Bento Grid 佈局 */
.dashboard-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    /* 強制三欄 */
    gap: 1.5rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .dashboard-metrics {
        grid-template-columns: 1fr;
    }
}

/* 指標卡片 (Glassmorphism + Gradient) */
.metric-card {
    background: var(--dash-card-bg);
    padding: 1.5rem;
    border-radius: 20px;
    border: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--dash-primary);
    opacity: 0.8;
}

.metric-card:nth-child(2)::before {
    background: var(--dash-primary);
}

/* Indigo */
.metric-card:nth-child(3)::before {
    background: var(--dash-accent);
}

/* Orange */

.metric-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.metric-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.5rem;
}

.metric-icon.blue {
    background: var(--dash-primary-light);
    color: var(--dash-primary);
}

.metric-icon.purple {
    background: #F3E8FF;
    color: #9333EA;
}

.metric-icon.red {
    background: var(--dash-danger-light);
    color: var(--dash-danger);
}

.metric-info {
    display: flex;
    flex-direction: column;
}

.metric-label {
    font-size: 0.9rem;
    color: var(--dash-text-sub);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

.metric-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--dash-text-main);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

/* 儀表板區塊 */
.dashboard-section {
    background: var(--dash-card-bg);
    border-radius: 20px;
    border: 1px solid rgba(226, 232, 240, 0.8);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.section-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dash-text-main);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* 呼吸燈動畫 */
.status-pulse {
    display: inline-block;
    width: 12px;
    height: 12px;
    background-color: var(--dash-danger);
    border-radius: 50%;
    box-shadow: 0 0 0 rgba(239, 68, 68, 0.4);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }

    70% {
        box-shadow: 0 0 0 10px rgba(239, 68, 68, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    }
}

/* 即時監控網格 (Bento Grid) */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    /* 預設四欄 */
    gap: 1rem;
}

@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.room-status-card {
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 0.75rem;
    transition: all 0.2s ease;
    border-left: 5px solid #cbd5e1;
    background: white;
    min-height: 110px;
}

.room-status-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.room-status-card.active {
    border-left-color: var(--dash-danger);
    background: var(--dash-danger-light);
}

.room-status-card.idle {
    border-left-color: var(--dash-success);
    background: var(--dash-success-light);
}

.room-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.room-name {
    font-weight: 700;
    font-size: 1rem;
    color: var(--dash-text-main);
    line-height: 1.3;
}

.room-status-badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    width: fit-content;
    white-space: nowrap;
}

.room-status-card.active .room-status-badge {
    background: white;
    color: var(--dash-danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.room-status-card.idle .room-status-badge {
    background: white;
    color: var(--dash-success);
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.room-user {
    font-size: 0.9rem;
    color: var(--dash-text-sub);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* 圖表容器 - 讓圖表更突出 */
.dashboard-chart-container {
    height: 320px;
    width: 100%;
    margin-top: 1rem;
    overflow-x: auto;
    /* RWD 水平捲動 */
    padding-bottom: 0.5rem;
    /* 預留捲軸空間 */
}

/* 隱藏捲軸但保留功能 (Chrome, Safari, Opera) */
.dashboard-chart-container::-webkit-scrollbar {
    height: 6px;
}

.dashboard-chart-container::-webkit-scrollbar-track {
    background: transparent;
}

.dashboard-chart-container::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}

.bar-chart {
    display: flex;
    /* 改為水平排列 */
    align-items: flex-end;
    /* 底部對齊 */
    height: 100%;
    min-width: 600px;
    /* 確保最小寬度，觸發捲動 */
    gap: 0.5rem;
    padding: 0 0.5rem;
}

.trend-bar-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    height: 100%;
    gap: 0.5rem;
    min-width: 32px;
    /* 防止過度壓縮 */
}

.trend-value {
    font-size: 0.75rem;
    color: var(--dash-text-sub);
    font-weight: 600;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.trend-bar-wrapper:hover .trend-value {
    opacity: 1;
    transform: translateY(0);
}

.trend-bar {
    width: 100%;
    border-radius: 8px 8px 0 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    cursor: pointer;
    min-height: 4px;
    /* 確保數值為 0 時仍有一條線 */
}

.trend-bar:hover {
    filter: brightness(1.1);
    transform: scaleX(1.1);
    z-index: 10;
}

.trend-label {
    font-size: 0.75rem;
    color: var(--dash-text-sub);
    font-family: monospace;
    margin-top: 0.25rem;
}

/* Rainbow Spectrum 漸層色系 */
.trend-bar-wrapper:nth-child(15n+1) .trend-bar {
    background: linear-gradient(180deg, #EF4444 0%, #F87171 100%);
    box-shadow: 0 4px 6px -1px rgba(239, 68, 68, 0.3);
}

.trend-bar-wrapper:nth-child(15n+2) .trend-bar {
    background: linear-gradient(180deg, #F97316 0%, #FB923C 100%);
    box-shadow: 0 4px 6px -1px rgba(249, 115, 22, 0.3);
}

.trend-bar-wrapper:nth-child(15n+3) .trend-bar {
    background: linear-gradient(180deg, #F59E0B 0%, #FBBF24 100%);
    box-shadow: 0 4px 6px -1px rgba(245, 158, 11, 0.3);
}

.trend-bar-wrapper:nth-child(15n+4) .trend-bar {
    background: linear-gradient(180deg, #EAB308 0%, #FACC15 100%);
    box-shadow: 0 4px 6px -1px rgba(234, 179, 8, 0.3);
}

.trend-bar-wrapper:nth-child(15n+5) .trend-bar {
    background: linear-gradient(180deg, #84CC16 0%, #A3E635 100%);
    box-shadow: 0 4px 6px -1px rgba(132, 204, 22, 0.3);
}

.trend-bar-wrapper:nth-child(15n+6) .trend-bar {
    background: linear-gradient(180deg, #22C55E 0%, #4ADE80 100%);
    box-shadow: 0 4px 6px -1px rgba(34, 197, 94, 0.3);
}

.trend-bar-wrapper:nth-child(15n+7) .trend-bar {
    background: linear-gradient(180deg, #10B981 0%, #34D399 100%);
    box-shadow: 0 4px 6px -1px rgba(16, 185, 129, 0.3);
}

.trend-bar-wrapper:nth-child(15n+8) .trend-bar {
    background: linear-gradient(180deg, #14B8A6 0%, #2DD4BF 100%);
    box-shadow: 0 4px 6px -1px rgba(20, 184, 166, 0.3);
}

.trend-bar-wrapper:nth-child(15n+9) .trend-bar {
    background: linear-gradient(180deg, #06B6D4 0%, #22D3EE 100%);
    box-shadow: 0 4px 6px -1px rgba(6, 182, 212, 0.3);
}

.trend-bar-wrapper:nth-child(15n+10) .trend-bar {
    background: linear-gradient(180deg, #0EA5E9 0%, #38BDF8 100%);
    box-shadow: 0 4px 6px -1px rgba(14, 165, 233, 0.3);
}

.trend-bar-wrapper:nth-child(15n+11) .trend-bar {
    background: linear-gradient(180deg, #3B82F6 0%, #60A5FA 100%);
    box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.3);
}

.trend-bar-wrapper:nth-child(15n+12) .trend-bar {
    background: linear-gradient(180deg, #6366F1 0%, #818CF8 100%);
    box-shadow: 0 4px 6px -1px rgba(99, 102, 241, 0.3);
}

.trend-bar-wrapper:nth-child(15n+13) .trend-bar {
    background: linear-gradient(180deg, #8B5CF6 0%, #A78BFA 100%);
    box-shadow: 0 4px 6px -1px rgba(139, 92, 246, 0.3);
}

.trend-bar-wrapper:nth-child(15n+14) .trend-bar {
    background: linear-gradient(180deg, #A855F7 0%, #C084FC 100%);
    box-shadow: 0 4px 6px -1px rgba(168, 85, 247, 0.3);
}

.trend-bar-wrapper:nth-child(15n+15) .trend-bar {
    background: linear-gradient(180deg, #D946EF 0%, #E879F9 100%);
    box-shadow: 0 4px 6px -1px rgba(217, 70, 239, 0.3);
}

/* 底部列 */
.dashboard-footer {
    padding: 1rem 2rem;
    background: white;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dashboard-time {
    color: var(--dash-text-sub);
    font-size: 0.9rem;
    font-family: monospace;
    /* 時間用等寬字型 */
}

.btn-refresh {
    background: white;
    border: 1px solid var(--border-color);
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    color: var(--dash-text-main);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-refresh:hover {
    background: var(--dash-bg);
    border-color: var(--dash-primary);
    color: var(--dash-primary);
}

/* ===== AI 智慧建議區域 (UI Enhanced v2) ===== */
.smart-suggestions {
    margin-top: 2rem;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 20px;
    padding: 1.5rem;
    animation: premiumSlideIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
    position: relative;
    border-top: 4px solid transparent;
    /* 為漸層邊框預留空間 */
    background-image: linear-gradient(white, white), linear-gradient(to right, #f59e0b, #3b82f6, #8b5cf6);
    background-origin: border-box;
    background-clip: content-box, border-box;
    animation: premiumGlow 3s infinite alternate;
}

@keyframes premiumGlow {
    0% {
        box-shadow: 0 10px 25px -5px rgba(245, 158, 11, 0.1), 0 8px 10px -6px rgba(59, 130, 246, 0.1);
    }

    100% {
        box-shadow: 0 15px 35px -5px rgba(245, 158, 11, 0.2), 0 10px 15px -6px rgba(139, 92, 246, 0.2);
        border-top-color: rgba(245, 158, 11, 0.5);
    }
}

@keyframes premiumSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.smart-suggestions.hidden {
    display: none;
}

.suggestions-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    background: linear-gradient(to right, #1f2937, #4b5563);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.25rem;
}

.suggestions-header svg {
    color: #F59E0B;
}

.suggestions-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.suggestion-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #f9fafb;
    padding: 1.25rem;
    border-radius: 16px;
    border: 1px solid #f3f4f6;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.suggestion-card:hover {
    background: white;
    border-color: transparent;
    transform: scale(1.02);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.suggestion-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    padding: 2px;
    background: linear-gradient(135deg, #f59e0b20, #3b82f620, #8b5cf620);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s;
}

.suggestion-card:hover::before {
    opacity: 1;
}

.suggestion-info {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    flex: 1;
}

.suggestion-main {
    font-weight: 700;
    color: #111827;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.suggestion-sub {
    font-size: 0.9rem;
    color: #4b5563;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-apply-suggestion {
    padding: 0.6rem 1.25rem;
    background: #111827;
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.suggestion-card:hover .btn-apply-suggestion {
    background: linear-gradient(135deg, #111827, #374151);
    transform: translateX(3px);
}

/* 找空檔按鈕 v2 */
.btn-find-alt {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 0.75rem;
    padding: 0.4rem 0.8rem;
    background: linear-gradient(135deg, #F59E0B, #D97706);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 10px -2px rgba(245, 158, 11, 0.4);
    vertical-align: middle;
}

.btn-find-alt:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 6px 15px -3px rgba(245, 158, 11, 0.5);
    filter: saturate(1.2);
}

/* 手機端 RWD 優化 v3 */
@media (max-width: 768px) {
    .control-panel {
        padding: 1.25rem;
    }

    .control-row {
        flex-direction: column;
        align-items: stretch;
    }

    .control-group {
        flex-direction: column;
        align-items: stretch;
        background: rgba(255, 255, 255, 0.8);
    }

    .date-separator {
        display: none;
        /* 手機端隱藏分隔符，改用陰影排版 */
    }

    .date-input {
        width: 100%;
        text-align: center;
        background: #f8faff;
        border: 1px solid #edf2f7;
    }

    .room-select {
        width: 100%;
        background-color: #f8faff;
    }

    .btn-group {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }

    .btn-search {
        grid-column: span 2;
        padding: 1rem;
        font-size: 1.1rem;
    }
}

/* RWD v2 */
@media (max-width: 640px) {
    .suggestion-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .btn-apply-suggestion {
        width: 100%;
        padding: 0.8rem;
    }

    .smart-suggestions {
        padding: 1.25rem;
        margin-top: 1.5rem;
        border-radius: 0 0 20px 20px;
        margin-bottom: -1rem;
    }
}/* ===== ??閰單?敶? (Glassmorphism & Vibrant Design) ===== */

/* 敶??桃蔗嚗?撘瑟芋蝟????*/
.delete-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    /* 瘛梯?€?? */
    backdrop-filter: blur(8px);
    /* ?璅∠? */
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2100;
    /* 擃?嗡??惜 */
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.delete-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* 敶??祇?嚗lassmorphism + Claymorphism */
.delete-modal {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    width: 90%;
    max-width: 420px;
    /* 蝔凝?祝 */
    padding: 0;
    /* 蝘駁?扯?嚗摮?蝝??*/
    box-shadow:
        0 20px 50px rgba(0, 0, 0, 0.2),
        0 0 0 1px rgba(255, 255, 255, 0.5) inset;
    /* ?折?? */
    transform: scale(0.9) translateY(20px);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    /* 敶€批???*/
    border: 1px solid rgba(255, 255, 255, 0.6);
    overflow: hidden;
}

.delete-modal-overlay.active .delete-modal {
    transform: scale(1) translateY(0);
}

/* 璅??€??瞍詨惜? */
.delete-modal-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    /* ?蜓?脰矽銝€??*/
    padding: 1.5rem;
    color: white;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    position: relative;
    overflow: hidden;
}

/* 璅??鋆ˇ */
.delete-modal-header::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0%, transparent 60%);
    opacity: 0.6;
    pointer-events: none;
}

.delete-modal-header svg {
    width: 48px;
    height: 48px;
    stroke-width: 1.5;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
    margin-bottom: 0.25rem;
}

.delete-modal-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: 1px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* ?批捆?€??憭批?擃?皜?? */
.delete-booking-info {
    padding: 2rem 1.5rem;
    color: var(--text-primary);
    font-size: 1.1rem;
    line-height: 1.8;
    text-align: left;
    background: linear-gradient(to bottom, #ffffff 0%, #f8faff 100%);
}

.delete-booking-info strong {
    color: var(--primary-dark);
    font-weight: 600;
    display: inline-block;
    width: 80px;
    /* ?箏?璅惜撖砍漲 */
    margin-right: 0.5rem;
}

/* ???€??*/
.delete-modal-actions {
    padding: 1.25rem 1.5rem;
    background: #f1f5f9;
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.btn-delete-cancel,
.btn-delete-confirm {
    flex: 1;
    padding: 0.8rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    /* 憓?閫豢?€??*/
}

/* 餈??? */
.btn-delete-cancel {
    background: white;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.btn-delete-cancel:hover {
    background: #f8fafc;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* 蝣箄?/??????嚗悅鞊?/璈撓撅?*/
.btn-delete-confirm {
    background: linear-gradient(135deg, #FF6B6B 0%, #EE5253 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(238, 82, 83, 0.4);
}

.btn-delete-confirm:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 20px rgba(238, 82, 83, 0.5);
    filter: brightness(1.1);
}

.btn-delete-confirm:active {
    transform: translateY(0) scale(0.98);
}

/* ?????*/
@media (max-width: 480px) {
    .delete-modal {
        width: 95%;
        max-width: none;
        border-radius: 20px;
    }

    .delete-booking-info {
        font-size: 1rem;
        padding: 1.5rem;
    }

    .delete-booking-info strong {
        display: block;
        /* ????蝐斗?銵?*/
        width: auto;
        margin-bottom: 0.1rem;
        color: var(--text-muted);
        font-size: 0.9rem;
    }
}

/* .info-item new structure */
.info-item {
    display: flex;
    margin-bottom: 0.8rem;
    align-items: flex-start;
}

.info-item:last-child {
    margin-bottom: 0;
}

.info-item strong {
    min-width: 80px;
    color: var(--primary-dark);
    font-weight: 600;
}

.info-item span {
    flex: 1;
    word-break: break-all;
    line-height: 1.5;
}


/* ===== PWA Glassmorphism Install Prompt ===== */
.pwa-prompt {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 
        0 8px 32px rgba(31, 38, 135, 0.15),
        inset 0 0 0 1px rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    z-index: 9999;
    max-width: 400px;
    transform: translateY(0);
    opacity: 1;
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    animation: slideUpFade 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.pwa-prompt.hidden {
    display: none !important;
}

/* 隱藏狀態 */
.pwa-prompt.dismissed {
    transform: translateY(120%);
    opacity: 0;
    pointer-events: none;
}

.pwa-icon img {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.pwa-content {
    flex: 1;
}

.pwa-content h3 {
    margin: 0 0 4px 0;
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 700;
}

.pwa-content p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.pwa-actions {
    display: flex;
    gap: 8px;
    flex-direction: column; 
    flex-direction: row; 
}

.btn-pwa-install {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-pwa-install:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
}

.btn-pwa-dismiss {
    background: transparent;
    color: #666;
    border: 1px solid transparent;
    padding: 8px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-pwa-dismiss:hover {
    background: rgba(0,0,0,0.05);
    color: #333;
}

@keyframes slideUpFade {
    from {
        transform: translateY(40px) scale(0.95);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

/* Mobile Responsive */
@media (max-width: 600px) {
    .pwa-prompt {
        bottom: 0;
        left: 0;
        right: 0;
        border-radius: 20px 20px 0 0;
        border-bottom: none;
        max-width: 100%;
        padding: 20px;
        flex-direction: column;
        align-items: stretch;
        background: rgba(255, 255, 255, 0.9);
    }

    .pwa-icon {
        display: block;
        align-self: flex-start;
    }
    
    .pwa-prompt {
        display: grid;
        grid-template-columns: auto 1fr;
        grid-template-rows: auto auto;
        gap: 16px 12px;
    }
    
    .pwa-icon {
        grid-row: 1;
        grid-column: 1;
    }
    
    .pwa-content {
        grid-row: 1;
        grid-column: 2;
        text-align: left;
    }
    
    .pwa-actions {
        grid-row: 2;
        grid-column: 1 / -1;
        display: flex;
        width: 100%;
        flex-direction: row;
    }
    
    .btn-pwa-install {
        flex: 2;
        justify-content: center;
        padding: 12px;
    }
    
    .btn-pwa-dismiss {
        flex: 1;
        justify-content: center;
        padding: 12px;
        border: 1px solid rgba(0,0,0,0.1);
    }
}

/* History Delete Button */
.btn-history-delete {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 4px 8px;
    color: var(--text-muted);
    transition: all 0.2s;
    margin-left: auto;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.btn-history-delete:hover {
    color: var(--accent-color);
    background: rgba(245, 101, 101, 0.1);
    transform: scale(1.1);
}