/* =============================================
   淨水器保固管理系統 - 主要樣式
   ============================================= */

:root {
    --primary: #0891b2;
    --primary-dark: #0e7490;
    --primary-light: #06b6d4;
    --primary-bg: #ecfeff;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --dark: #1e293b;
    --light: #f8fafc;
    --border: #e2e8f0;
    --sidebar-width: 260px;
    --header-height: 60px;
    --font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background: #f1f5f9;
    color: var(--dark);
    margin: 0;
    padding: 0;
    font-size: 17.5px;
    line-height: 1.6;
}

a {
    color: var(--primary);
    text-decoration: none;
}
a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* =============================================
   Login Page
   ============================================= */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0891b2 0%, #06b6d4 50%, #67e8f9 100%);
}
.login-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,.15);
    padding: 40px;
    width: 100%;
    max-width: 420px;
}
.login-card h2 {
    text-align: center;
    color: var(--primary-dark);
    margin-bottom: 8px;
    font-size: 30px;
}
.login-card .subtitle {
    text-align: center;
    color: var(--secondary);
    margin-bottom: 28px;
    font-size: 16.25px;
}
.login-card .logo-icon {
    text-align: center;
    font-size: 60px;
    margin-bottom: 12px;
}

/* =============================================
   Admin Layout: Sidebar + Header + Content
   ============================================= */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #0e7490 0%, #0891b2 100%);
    color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1000;
    overflow-y: auto;
    transition: transform .3s ease;
}
.sidebar-brand {
    padding: 18px 20px;
    font-size: 22.5px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid rgba(255,255,255,.15);
}
.sidebar-brand i {
    font-size: 30px;
}
.sidebar-menu {
    list-style: none;
    padding: 12px 0;
    margin: 0;
}
.sidebar-menu li {
    list-style: none;
}
.sidebar-menu li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 24px;
    color: rgba(255,255,255,.8);
    font-size: 17.5px;
    transition: all .2s;
    text-decoration: none;
}
.sidebar-menu li a:hover,
.sidebar-menu li a.active {
    color: #fff;
    background: rgba(255,255,255,.12);
}
.sidebar-menu li a.active {
    border-right: 3px solid #fff;
}
.sidebar-menu li a i {
    width: 20px;
    text-align: center;
    font-size: 20px;
}
.sidebar-divider {
    border-top: 1px solid rgba(255,255,255,.12);
    margin: 8px 20px;
}
.sidebar-heading {
    padding: 10px 24px 4px;
    font-size: 13.75px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(255,255,255,.45);
    font-weight: 600;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}

/* Top Header */
.top-header {
    height: var(--header-height);
    background: #fff;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 100;
}
.top-header .breadcrumb {
    margin: 0;
    padding: 0;
    background: none;
    font-size: 16.25px;
}
.top-header .header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}
.top-header .btn-toggle-sidebar {
    display: none;
    background: none;
    border: none;
    font-size: 25px;
    color: var(--dark);
    cursor: pointer;
    padding: 4px;
}
.notification-bell {
    position: relative;
    font-size: 25px;
    color: var(--secondary);
    cursor: pointer;
}
.notification-bell .badge-count {
    position: absolute;
    top: -6px;
    right: -8px;
    background: var(--danger);
    color: #fff;
    font-size: 12.5px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.user-dropdown {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--dark);
    font-size: 16.25px;
}

/* Content Area */
.content-area {
    padding: 24px;
    flex: 1;
}

.page-title {
    font-size: 27.5px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 20px;
}

/* =============================================
   Cards
   ============================================= */
.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: 18.75px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fff;
    border-radius: 12px 12px 0 0;
}
.card-body {
    padding: 20px;
}
.card-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    background: var(--light);
    border-radius: 0 0 12px 12px;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.stat-card .stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 27.5px;
    flex-shrink: 0;
}
.stat-card .stat-icon.bg-primary { background: var(--primary-bg); color: var(--primary); }
.stat-card .stat-icon.bg-success { background: #ecfdf5; color: var(--success); }
.stat-card .stat-icon.bg-warning { background: #fffbeb; color: var(--warning); }
.stat-card .stat-icon.bg-info { background: #eff6ff; color: var(--info); }
.stat-card .stat-icon.bg-danger { background: #fef2f2; color: var(--danger); }
.stat-card .stat-info {
    min-width: 0;
}
.stat-card .stat-value {
    font-size: 30px;
    font-weight: 700;
    color: var(--dark);
    line-height: 1.2;
}
.stat-card .stat-label {
    font-size: 15px;
    color: var(--secondary);
    margin-top: 2px;
}

/* =============================================
   Tables
   ============================================= */
.table-responsive {
    overflow-x: auto;
}
.table {
    width: 100%;
    border-collapse: collapse;
}
.table thead th {
    background: var(--light);
    padding: 10px 14px;
    text-align: left;
    font-size: 15px;
    font-weight: 600;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: .5px;
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}
.table tbody td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    font-size: 16.25px;
    vertical-align: middle;
}
.table tbody tr:hover {
    background: #f8fafc;
}
.table .actions {
    white-space: nowrap;
}

/* =============================================
   Forms
   ============================================= */
.form-label {
    font-weight: 600;
    font-size: 16.25px;
    color: var(--dark);
    margin-bottom: 4px;
    display: block;
}
.form-control,
.form-select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 17.5px;
    font-family: var(--font-family);
    background: #fff;
    transition: border-color .2s;
}
.form-control:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(8,145,178,.1);
}
textarea.form-control {
    resize: vertical;
    min-height: 80px;
}
.form-text {
    font-size: 15px;
    color: var(--secondary);
    margin-top: 4px;
}
.form-check {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 4px;
}
.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    accent-color: var(--primary);
}
.form-group {
    margin-bottom: 16px;
}
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}
.required::after {
    content: ' *';
    color: var(--danger);
}

/* =============================================
   Buttons
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    font-size: 16.25px;
    font-weight: 500;
    font-family: var(--font-family);
    cursor: pointer;
    transition: all .2s;
    text-decoration: none;
    white-space: nowrap;
}
.btn:hover {
    text-decoration: none;
    opacity: .9;
    transform: translateY(-1px);
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-secondary { background: var(--secondary); color: #fff; }
.btn-info { background: var(--info); color: #fff; }
.btn-outline {
    background: #fff;
    border: 1px solid var(--border);
    color: var(--dark);
}
.btn-outline:hover {
    background: var(--light);
}
.btn-sm {
    padding: 5px 10px;
    font-size: 15px;
}
.btn-lg {
    padding: 12px 24px;
    font-size: 18.75px;
}

/* =============================================
   Badges
   ============================================= */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 13.75px;
    font-weight: 600;
}
.badge-primary { background: var(--primary-bg); color: var(--primary); }
.badge-success { background: #ecfdf5; color: var(--success); }
.badge-danger { background: #fef2f2; color: var(--danger); }
.badge-warning { background: #fffbeb; color: var(--warning); }
.badge-info { background: #eff6ff; color: var(--info); }
.badge-secondary { background: #f1f5f9; color: var(--secondary); }

/* =============================================
   Alerts
   ============================================= */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 16.25px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.alert-success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-danger { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert-warning { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }

/* =============================================
   Modal
   ============================================= */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}
.modal-overlay.active {
    display: flex;
}
.modal-box {
    background: #fff;
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    font-size: 20px;
}
.modal-close {
    background: none;
    border: none;
    font-size: 25px;
    cursor: pointer;
    color: var(--secondary);
    padding: 4px;
}
.modal-body {
    padding: 20px;
}
.modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* =============================================
   Filter Bar
   ============================================= */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: flex-end;
    margin-bottom: 16px;
    padding: 16px;
    background: var(--light);
    border-radius: 8px;
}
.filter-bar .form-group {
    margin-bottom: 0;
}

/* =============================================
   Tabs
   ============================================= */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--border);
    margin-bottom: 20px;
}
.tab-item {
    padding: 10px 20px;
    font-size: 17.5px;
    font-weight: 500;
    color: var(--secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all .2s;
    text-decoration: none;
}
.tab-item:hover,
.tab-item.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    text-decoration: none;
}

/* =============================================
   Mobile / Customer Frontend
   ============================================= */
.mobile-wrapper {
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
    background: #fff;
}
.mobile-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    padding: 20px;
    text-align: center;
}
.mobile-header h1 {
    font-size: 22.5px;
    margin: 0;
}
.mobile-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    padding: 20px;
}
.mobile-nav-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    text-align: center;
    text-decoration: none;
    color: var(--dark);
    transition: all .2s;
}
.mobile-nav-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,.08);
    text-decoration: none;
    color: var(--dark);
}
.mobile-nav-card i {
    font-size: 35px;
    color: var(--primary);
    display: block;
    margin-bottom: 8px;
}
.mobile-nav-card span {
    font-size: 15px;
    font-weight: 600;
}

/* Customer card style */
.info-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
}
.info-card .info-label {
    font-size: 13.75px;
    color: var(--secondary);
    margin-bottom: 2px;
}
.info-card .info-value {
    font-size: 17.5px;
    font-weight: 600;
    color: var(--dark);
}

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
    }
    .top-header .btn-toggle-sidebar {
        display: block;
    }
    .content-area {
        padding: 16px;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .filter-bar {
        flex-direction: column;
    }
}
@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .mobile-nav {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* =============================================
   Utility Classes
   ============================================= */
.text-primary { color: var(--primary) !important; }
.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-warning { color: var(--warning) !important; }
.text-muted { color: var(--secondary) !important; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 16px; }
.mt-4 { margin-top: 24px; }
.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 24px; }
.d-flex { display: flex; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 16px; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.w-100 { width: 100%; }
.hidden { display: none !important; }