:root {
    --primary: #0D9488;
    --primary-dark: #0F766E;
    --primary-light: #CCFBF1;
    --primary-50: #F0FDFA;
    --accent: #06B6D4;
    --accent-light: #CFFAFE;
    --success: #16A34A;
    --success-light: #DCFCE7;
    --danger: #DC2626;
    --danger-light: #FEE2E2;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--gray-50) 50%, var(--accent-light) 100%);
    color: var(--gray-900);
    line-height: 1.6;
    min-height: 100vh;
}

.container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }

/* ===== Header ===== */
.header {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 8px rgba(13,148,136,0.08);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 2px solid var(--primary-light);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-dark);
    text-decoration: none;
}

.logo i {
    font-size: 26px;
    color: var(--primary);
    animation: pulse-icon 3s ease-in-out infinite;
}

@keyframes pulse-icon {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 4px;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-500);
    font-size: 14px;
    font-weight: 600;
    padding: 8px 18px;
    border-radius: 50px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-link i { font-size: 14px; }

.nav-link:hover { color: var(--primary); background: var(--primary-light); }

.nav-link.active {
    color: white;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: 0 2px 8px rgba(13,148,136,0.3);
}

/* ===== Main ===== */
.main { min-height: calc(100vh - 128px); padding: 24px 0 32px; }

.section { display: none; }
.section.active { display: block; animation: fadeSlideIn 0.4s ease; }

@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Hero Banner ===== */
.hero-banner {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: var(--radius-lg);
    padding: 48px 32px;
    margin-bottom: 36px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(13,148,136,0.25);
}

.hero-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: rgba(255,255,255,0.08);
    border-radius: 50%;
}

.hero-banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 200px;
    height: 200px;
    background: rgba(255,255,255,0.06);
    border-radius: 50%;
}

.hero-icon { font-size: 52px; margin-bottom: 16px; opacity: 0.95; }

.hero-banner h1 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.hero-subtitle {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 20px;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.hero-features span {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    opacity: 0.9;
    background: rgba(255,255,255,0.15);
    padding: 6px 16px;
    border-radius: 50px;
    backdrop-filter: blur(4px);
}

.section-heading { text-align: center; margin-bottom: 28px; }
.section-heading h2 { font-size: 22px; font-weight: 700; color: var(--gray-800); }
.section-heading p { color: var(--gray-500); font-size: 14px; margin-top: 4px; }

/* ===== Thursday Grid ===== */
.thursday-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.thursday-card {
    background: white;
    border-radius: var(--radius);
    padding: 24px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.thursday-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

.thursday-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.thursday-card:hover::before { transform: scaleX(1); }

.thursday-card .date {
    font-size: 26px;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 2px;
}

.thursday-card .weekday {
    font-size: 13px;
    color: var(--gray-500);
    margin-bottom: 14px;
}

.thursday-card .status {
    display: inline-block;
    padding: 5px 16px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 700;
}

.thursday-card .status.available { background: var(--success-light); color: var(--success); }
.thursday-card .status.full { background: var(--danger-light); color: var(--danger); }
.thursday-card .status.closed { background: var(--gray-100); color: var(--gray-500); }

/* Progress bar */
.card-progress {
    margin-top: 14px;
    background: var(--gray-100);
    border-radius: 50px;
    height: 6px;
    overflow: hidden;
}

.card-progress-bar {
    height: 100%;
    border-radius: 50px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.6s ease;
}

.card-progress-bar.full { background: linear-gradient(90deg, var(--danger), #EF4444); }

.thursday-card .remaining {
    font-size: 12px;
    color: var(--gray-400);
    margin-top: 8px;
}

.thursday-card.disabled { opacity: 0.55; cursor: not-allowed; }
.thursday-card.disabled:hover { transform: none; box-shadow: var(--shadow); border-color: transparent; }

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    box-shadow: 0 2px 8px rgba(13,148,136,0.25);
}

.btn-primary:hover:not(:disabled) {
    box-shadow: 0 4px 16px rgba(13,148,136,0.35);
    transform: translateY(-1px);
}

.btn-outline {
    background: white;
    border: 1.5px solid var(--gray-300);
    color: var(--gray-700);
}

.btn-outline:hover:not(:disabled) { border-color: var(--primary); color: var(--primary); background: var(--primary-50); }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover:not(:disabled) { background: #B91C1C; }

.btn-success { background: var(--success); color: white; }
.btn-success:hover:not(:disabled) { background: #15803D; }

.btn-block { width: 100%; }
.btn-large { padding: 14px 28px; font-size: 16px; border-radius: 16px; }
.btn-back { background: none; color: var(--gray-500); padding: 8px 0; margin-bottom: 20px; }
.btn-back:hover { color: var(--primary); }
.btn-sm { padding: 7px 14px; font-size: 13px; border-radius: 8px; }

/* ===== Forms ===== */
.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    border: 1.5px solid var(--gray-300);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    background: white;
    color: var(--gray-900);
    min-height: 44px;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(13,148,136,0.12);
}

.form-control::placeholder { color: var(--gray-400); }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 600; color: var(--gray-700); font-size: 14px; }
.required { color: var(--danger); }
textarea.form-control { min-height: 100px; resize: vertical; }

.checkbox-label {
    display: flex !important;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

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

/* ===== Booking ===== */
.booking-container { max-width: 500px; margin: 0 auto; }

.booking-card {
    background: white;
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow-md);
    border-top: 4px solid var(--primary);
}

.booking-header { text-align: center; margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--gray-200); }
.booking-header h2 { font-size: 22px; font-weight: 700; color: var(--primary-dark); }
.booking-header p { color: var(--gray-500); margin-top: 4px; font-size: 14px; }

.input-with-btn { display: flex; gap: 12px; }
.input-with-btn .form-control { flex: 1; }

/* ===== Loading ===== */
.btn.loading { position: relative; color: transparent; }
.btn.loading::after {
    content: '';
    position: absolute;
    width: 20px; height: 20px;
    border: 2.5px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Success ===== */
.success-card {
    max-width: 500px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-md);
}

.success-animation { position: relative; display: inline-block; margin-bottom: 16px; }

.success-icon {
    font-size: 72px;
    color: var(--success);
    animation: successBounce 0.6s ease;
}

@keyframes successBounce {
    0% { transform: scale(0); opacity: 0; }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}

.success-card h2 { font-size: 24px; font-weight: 700; margin-bottom: 24px; color: var(--success); }

.success-info {
    background: var(--primary-50);
    border-radius: var(--radius-sm);
    padding: 20px;
    margin-bottom: 20px;
    text-align: left;
    border-left: 4px solid var(--primary);
}

.success-info p { margin: 10px 0; color: var(--gray-700); font-size: 14px; }
.success-info strong { color: var(--gray-900); }

.success-tip {
    color: var(--warning);
    font-weight: 600;
    margin-bottom: 24px;
    font-size: 14px;
    background: var(--warning-light);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.success-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ===== Query ===== */
.page-title { text-align: center; margin-bottom: 40px; }
.page-title h1 { font-size: 28px; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; }
.page-title p { color: var(--gray-500); font-size: 16px; }
.section-title { font-size: 24px; font-weight: 700; margin-bottom: 24px; text-align: center; color: var(--gray-900); }

/* ===== Appointments List ===== */
.appointments-list { margin-top: 24px; }

.appointment-card {
    background: white;
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 12px;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    transition: var(--transition);
    border-left: 4px solid transparent;
}

.appointment-card:hover { box-shadow: var(--shadow-md); border-left-color: var(--primary); }

.appointment-info h4 { font-size: 16px; font-weight: 600; margin-bottom: 4px; color: var(--gray-900); }
.appointment-info p { color: var(--gray-500); font-size: 14px; margin: 2px 0; }

.appointment-status { padding: 5px 14px; border-radius: 50px; font-size: 13px; font-weight: 700; }
.appointment-status.confirmed { background: var(--primary-light); color: var(--primary-dark); }
.appointment-status.completed { background: var(--success-light); color: var(--success); }
.appointment-status.cancelled { background: var(--danger-light); color: var(--danger); }

/* ===== Login ===== */
.login-container { max-width: 400px; margin: 40px auto; }

.login-card {
    background: white;
    border-radius: var(--radius);
    padding: 40px 32px;
    box-shadow: var(--shadow-lg);
    border-top: 4px solid var(--primary);
}

.login-header { text-align: center; margin-bottom: 28px; }
.login-icon { font-size: 48px; color: var(--primary); margin-bottom: 12px; }
.login-header h2 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.login-header p { color: var(--gray-500); font-size: 14px; }

/* ===== Admin ===== */
.admin-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.admin-header-bar .section-title { margin-bottom: 0; text-align: left; }

.admin-tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--gray-200);
    margin-bottom: 24px;
}

.admin-tab {
    padding: 12px 24px;
    background: none;
    border: none;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-500);
    cursor: pointer;
    border-bottom: 2.5px solid transparent;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: -2px;
}

.admin-tab:hover { color: var(--gray-700); }
.admin-tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.admin-tab.hidden { display: none !important; }
.admin-content.hidden { display: none !important; }

.admin-content { display: none; }
.admin-content.active { display: block; animation: fadeSlideIn 0.3s ease; }

.admin-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.admin-filters { display: flex; gap: 10px; flex-wrap: wrap; }
.admin-filters select { min-width: 140px; }
.admin-actions-right { display: flex; gap: 8px; }

/* Batch toolbar */
.batch-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--primary-50);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    border: 1.5px solid var(--primary-light);
}

.batch-info { display: flex; align-items: center; gap: 16px; }
.batch-count { font-size: 13px; color: var(--gray-600); }
.batch-actions { display: flex; gap: 8px; }

.batch-select-all { font-weight: 600; color: var(--gray-700); }

/* Table */
.admin-table-container {
    overflow-x: auto;
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    -webkit-overflow-scrolling: touch;
}

.admin-table { width: 100%; border-collapse: collapse; }

.admin-table th, .admin-table td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid var(--gray-100);
}

.admin-table th {
    background: var(--gray-50);
    font-weight: 700;
    font-size: 12px;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.admin-table td { font-size: 14px; color: var(--gray-700); }
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover { background: var(--primary-50); }
.admin-table .actions { display: flex; gap: 6px; flex-wrap: wrap; }

.col-checkbox { width: 40px; text-align: center; }
.col-checkbox input[type="checkbox"] { accent-color: var(--primary); width: 16px; height: 16px; }
.admin-table td:first-child { text-align: center; }
.admin-table td:first-child input[type="checkbox"] { accent-color: var(--primary); width: 16px; height: 16px; }

/* ===== Stats ===== */
.stats-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 14px;
    margin-bottom: 24px;
}

.stat-card {
    background: white;
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-top: 3px solid var(--primary);
}

.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

.stat-card h4 {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-500);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-card .value { font-size: 28px; font-weight: 800; color: var(--primary); }
.stat-card .value.success { color: var(--success); }
.stat-card .value.danger { color: var(--danger); }

/* Charts */
.charts-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }

.chart-card {
    background: white;
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 16px;
}

.chart-card h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.chart-card h3 i { color: var(--primary); }

.chart-wrapper { position: relative; max-height: 280px; }
.chart-wrapper canvas { max-height: 280px; }
.chart-wide { margin-bottom: 16px; }

.stats-detail {
    background: white;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

.stats-detail h3 { font-size: 16px; font-weight: 700; margin-bottom: 16px; color: var(--gray-900); }

/* Stats Loading */
.stats-loading {
    text-align: center;
    padding: 48px 20px;
    color: var(--gray-500);
}

.stats-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    margin: 0 auto 16px;
    animation: spin 0.8s linear infinite;
}

.stats-loading p {
    font-size: 14px;
    color: var(--gray-500);
}

/* Stats Error */
.stats-error {
    text-align: center;
    padding: 48px 20px;
    color: var(--danger);
}

.stats-error i {
    font-size: 40px;
    margin-bottom: 12px;
}

.stats-error p {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 16px;
}

/* Stat Rate */
.stat-rate {
    font-size: 12px;
    color: var(--gray-500);
    margin-top: 4px;
    font-weight: 500;
}

/* ===== Modal ===== */
.modal {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 200;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal.active { display: flex; }

.modal-content {
    background: white;
    border-radius: var(--radius);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn { from { opacity: 0; transform: scale(0.95) translateY(10px); } to { opacity: 1; transform: scale(1) translateY(0); } }

.modal-small { max-width: 400px; }

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h3 { font-size: 18px; font-weight: 700; color: var(--gray-900); }

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--gray-400);
    padding: 4px;
    transition: var(--transition);
}

.modal-close:hover { color: var(--gray-600); }

.modal-body { padding: 24px; }

/* ===== Empty State ===== */
.empty-state { text-align: center; padding: 48px 20px; color: var(--gray-400); }
.empty-state i { font-size: 48px; margin-bottom: 16px; display: block; }
.empty-state p { font-size: 15px; }

/* ===== Toast ===== */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 14px 24px;
    border-radius: var(--radius-sm);
    color: white;
    font-weight: 600;
    font-size: 14px;
    transform: translateX(120%);
    transition: transform 0.3s ease;
    z-index: 300;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 8px;
}

.toast.show { transform: translateX(0); }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: var(--primary); }

/* ===== Footer ===== */
.footer {
    background: rgba(255,255,255,0.9);
    border-top: 1px solid var(--gray-200);
    padding: 20px 0;
    text-align: center;
    color: var(--gray-500);
    font-size: 14px;
}

.footer i { color: var(--primary); margin-right: 4px; }

/* ===== Print ===== */
.print-area { display: none; }

@media print {
    body * { visibility: hidden; }
    .print-area, .print-area * { visibility: visible; }
    .print-area { display: block; position: absolute; left: 0; top: 0; width: 100%; padding: 40px; }
    .print-header { text-align: center; border-bottom: 2px solid #333; padding-bottom: 20px; margin-bottom: 30px; }
    .print-header h1 { font-size: 24px; margin-bottom: 8px; }
    .print-info { margin-bottom: 30px; }
    .print-info p { margin: 12px 0; font-size: 16px; }
    .print-footer { margin-top: 40px; padding-top: 20px; border-top: 1px solid #ccc; text-align: center; color: #666; font-size: 14px; }
}

/* ===== Responsive: Tablet ===== */
@media (max-width: 768px) {
    .header .container { height: 56px; }
    .logo span { font-size: 15px; }
    .nav-link { padding: 6px 14px; font-size: 13px; }
    
    .hero-banner { padding: 32px 20px; border-radius: var(--radius); }
    .hero-banner h1 { font-size: 24px; }
    .hero-icon { font-size: 40px; }
    .hero-features { gap: 10px; }
    .hero-features span { font-size: 12px; padding: 5px 12px; }
    
    .thursday-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .thursday-card { padding: 18px 14px; }
    .thursday-card .date { font-size: 22px; }
    
    .admin-toolbar { flex-direction: column; align-items: stretch; }
    .admin-filters { flex-direction: column; }
    .admin-filters select { width: 100%; }
    .admin-actions-right { justify-content: stretch; }
    .admin-actions-right .btn { width: 100%; }
    
    .admin-tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .admin-tab { padding: 10px 16px; font-size: 13px; white-space: nowrap; }
    
    .appointment-card { flex-direction: column; align-items: flex-start; }
    .appointment-card > div:last-child { width: 100%; display: flex; justify-content: space-between; }
    
    .booking-card { padding: 24px; }
    .success-card { padding: 24px; }
    .success-actions { flex-direction: column; }
    .success-actions .btn { width: 100%; }
    
    .charts-row { grid-template-columns: 1fr; }
    
    .batch-toolbar { flex-direction: column; gap: 10px; align-items: stretch; }
    .batch-actions { justify-content: stretch; }
    .batch-actions .btn { flex: 1; }
}

/* ===== Responsive: Small Phone ===== */
@media (max-width: 480px) {
    .container { padding: 0 14px; }
    
    .header .container { height: 50px; }
    .logo i { font-size: 20px; }
    .logo span { font-size: 14px; }
    
    /* Bottom tab bar for mobile - 大按钮4菜单 */
    .header {
        position: fixed;
        bottom: 0;
        top: auto;
        left: 0;
        right: 0;
        border-bottom: none;
        border-top: 1px solid var(--gray-200);
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        box-shadow: 0 -2px 16px rgba(0,0,0,0.08);
        z-index: 999;
    }
    .header .container {
        justify-content: center;
        height: auto;
        padding: 0;
        max-width: 100%;
    }
    .logo { display: none; }
    .nav {
        width: 100%;
    }
    .nav-list {
        width: 100%;
        display: flex;
        justify-content: space-around;
        align-items: center;
        padding: 6px 0;
        padding-bottom: max(6px, env(safe-area-inset-bottom));
    }
    .nav-link {
        flex: 1;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        font-size: 10px;
        font-weight: 500;
        padding: 6px 0;
        gap: 2px;
        border-radius: 0;
        color: var(--gray-400);
        position: relative;
        min-height: 50px;
        -webkit-tap-highlight-color: transparent;
        text-align: center;
        overflow: hidden;
    }
    .nav-link i {
        font-size: 20px;
        transition: transform 0.2s ease;
    }
    .nav-link span {
        font-size: 10px;
        letter-spacing: 0;
        white-space: nowrap;
    }
    .nav-link:active {
        background: var(--primary-light);
    }
    .nav-link.active {
        color: var(--primary);
        background: transparent;
        box-shadow: none;
    }
    .nav-link.active::before {
        content: '';
        position: absolute;
        top: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 0;
        height: 0;
    }
    .nav-link.active i {
        transform: scale(1.1);
        color: var(--primary);
    }
    
    .main { padding: 16px 0 90px; }
    
    .hero-banner { padding: 24px 16px; margin-bottom: 24px; }
    .hero-banner h1 { font-size: 20px; }
    .hero-icon { font-size: 32px; }
    .hero-subtitle { font-size: 13px; }
    .hero-features { flex-direction: column; align-items: center; gap: 6px; }
    .hero-features span { font-size: 12px; }
    
    .section-heading h2 { font-size: 18px; }
    
    .thursday-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .thursday-card { padding: 14px 10px; }
    .thursday-card .date { font-size: 20px; }
    .thursday-card .status { font-size: 12px; padding: 4px 12px; }
    
    .input-with-btn { flex-direction: column; }
    .input-with-btn .btn { width: 100%; }
    
    .form-control { padding: 12px 14px; font-size: 16px; min-height: 48px; }
    
    .btn-large { padding: 14px 20px; font-size: 16px; }
    
    .stats-summary { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .stat-card .value { font-size: 24px; }
    
    .admin-table { font-size: 13px; }
    .admin-table th, .admin-table td { padding: 10px 8px; }
    .admin-table .actions { flex-direction: column; gap: 4px; }
    .admin-table .actions .btn { font-size: 12px; padding: 5px 10px; }
    
    .footer { display: none; }
}

/* ===== System Settings ===== */
.system-settings-header {
    margin-bottom: 24px;
}

.system-settings-header h3 {
    font-size: 18px;
    color: var(--gray-800);
    margin-bottom: 6px;
}

.system-settings-header h3 i {
    color: var(--primary);
    margin-right: 6px;
}

.settings-hint {
    color: var(--gray-500);
    font-size: 14px;
    margin-bottom: 16px;
}

.settings-actions-bar {
    display: flex;
    gap: 10px;
}

.system-settings-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.setting-item {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    transition: border-color 0.2s;
}

.setting-item.modified {
    border-left: 3px solid var(--primary);
}

.setting-label {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 4px;
    display: block;
}

.setting-desc {
    font-size: 13px;
    color: var(--gray-500);
    margin-bottom: 10px;
}

.setting-input {
    width: 100%;
    box-sizing: border-box;
}

.modified-badge {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary-dark);
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 12px;
    margin-left: 8px;
    vertical-align: middle;
}

/* ===== Data Backup ===== */
.backup-header {
    margin-bottom: 24px;
}

.backup-header h3 {
    font-size: 18px;
    color: var(--gray-800);
    margin-bottom: 6px;
}

.backup-header h3 i {
    color: var(--primary);
    margin-right: 6px;
}

.backup-hint {
    color: var(--gray-500);
    font-size: 14px;
}

.backup-info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.backup-info-card {
    background: white;
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
    border-top: 3px solid var(--primary);
}

.backup-info-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.backup-info-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.backup-info-icon i {
    font-size: 20px;
    color: var(--primary);
}

.backup-info-detail {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.backup-info-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.backup-info-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
}

.backup-action-area {
    text-align: center;
    padding: 32px 20px;
    background: var(--gray-50);
    border-radius: var(--radius);
    border: 2px dashed var(--gray-200);
}

.backup-action-hint {
    color: var(--gray-400);
    font-size: 13px;
    margin-top: 12px;
}

/* 用户信息样式 */
.user-info {
    margin-left: auto;
}

.user-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.user-badge.super {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
    color: white;
}

.user-badge.normal {
    background: linear-gradient(135deg, #06b6d4, #0d9488);
    color: white;
}

/* 隐藏无权限的标签 */
.admin-tab[style*="display: none"] {
    display: none !important;
}

.admin-content[style*="display: none"] {
    display: none !important;
}

/* 隐藏无权限的标签 */
.admin-tab.hidden {
    display: none !important;
}

.admin-content.hidden {
    display: none !important;
}