:root {
    --primary-color: #0078d4;
    --primary-hover: #106ebe;
    --background-color: #f3f2f1;
    --surface-color: #ffffff;
    --card-background: #ffffff;
    --text-primary: #323130;
    --text-secondary: #605e5c;
    --border-color: #e1dfdd;
    --danger-color: #d13438;
    --shadow-color: rgba(0, 0, 0, 0.1);
    /* New header variables */
    --header-height: 56px;
    --header-bg: rgba(255, 255, 255, 0.95);
    --header-bg-blur: rgba(255, 255, 255, 0.6);
    --bottom-nav-height: 64px;
    --nav-active-opacity: 1;
    --nav-inactive-opacity: 0.6;
}

/* Dark Theme */
[data-theme="dark"] {
    --primary-color: #4da6ff;
    --primary-hover: #7bbfff;
    --background-color: #1a1a1a;
    --surface-color: #2d2d2d;
    --card-background: #2d2d2d;
    --text-primary: #f0f0f0;
    --text-secondary: #b0b0b0;
    --border-color: #404040;
    --danger-color: #ff6b6b;
    --shadow-color: rgba(0, 0, 0, 0.3);
    /* Dark header variables */
    --header-bg: rgba(45, 45, 45, 0.95);
    --header-bg-blur: rgba(45, 45, 45, 0.6);
}

/* System preference fallback */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --primary-color: #4da6ff;
        --primary-hover: #7bbfff;
        --background-color: #1a1a1a;
        --surface-color: #2d2d2d;
        --card-background: #2d2d2d;
        --text-primary: #f0f0f0;
        --text-secondary: #b0b0b0;
        --border-color: #404040;
        --danger-color: #ff6b6b;
        --shadow-color: rgba(0, 0, 0, 0.3);
        --header-bg: rgba(45, 45, 45, 0.95);
        --header-bg-blur: rgba(45, 45, 45, 0.6);
    }
}

body {
    font-family: 'Segoe UI', 'Segoe UI Web (West European)', 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* ==========================================
   Sticky Header with Backdrop Blur
   ========================================== */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* Fallback for browsers without backdrop-filter */
@supports not (backdrop-filter: blur(8px)) {
    .header {
        background-color: var(--surface-color);
    }
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 16px;
    max-width: 1400px;
    margin: 0 auto;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
}

.header-logo:hover {
    color: var(--primary-color);
}

/* Desktop Navigation */
.desktop-nav {
    display: none;
    align-items: center;
    gap: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    opacity: var(--nav-inactive-opacity);
    transition: opacity 0.2s, background-color 0.2s;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.nav-link:hover {
    background-color: var(--border-color);
    opacity: var(--nav-active-opacity);
}

.nav-link.active {
    opacity: var(--nav-active-opacity);
}

.nav-link svg {
    width: 18px;
    height: 18px;
}

/* Header Right Actions */
.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-primary);
}

.mobile-menu-btn:hover {
    background-color: var(--border-color);
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
}

/* Search Toggle Button (desktop) */
.search-toggle-btn {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 12px;
    background: none;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    opacity: var(--nav-inactive-opacity);
    transition: opacity 0.2s, background-color 0.2s;
}

.search-toggle-btn:hover {
    background-color: var(--border-color);
    opacity: var(--nav-active-opacity);
}

.search-toggle-btn svg {
    width: 18px;
    height: 18px;
}

/* ==========================================
   Mobile Dropdown Menu
   ========================================== */
.mobile-menu {
    display: none;
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 8px 16px;
}

.mobile-menu.open {
    display: block;
}

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mobile-menu-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    opacity: var(--nav-inactive-opacity);
    transition: opacity 0.2s, background-color 0.2s;
    background: none;
    border: none;
    width: 100%;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
}

.mobile-menu-link:hover {
    background-color: var(--border-color);
    opacity: var(--nav-active-opacity);
}

.mobile-menu-link.active {
    opacity: var(--nav-active-opacity);
    background-color: var(--border-color);
}

.mobile-menu-link svg {
    width: 20px;
    height: 20px;
}

/* ==========================================
   Collapsible Search Panel
   ========================================== */
.search-panel {
    display: none;
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 16px;
}

.search-panel.open {
    display: block;
}

.search-panel-content {
    max-width: 1400px;
    margin: 0 auto;
}

.search-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.search-row > * {
    flex: 1;
    min-width: 140px;
}

.search-row input,
.search-row select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    background-color: var(--surface-color);
    color: var(--text-primary);
}

.search-row input:focus,
.search-row select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 120, 212, 0.2);
}

.search-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.search-actions .btn {
    padding: 10px 20px;
    border-radius: 6px;
}

/* ==========================================
   Bottom Navigation (Mobile)
   ========================================== */
.bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    z-index: 50;
}

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 500;
    opacity: var(--nav-inactive-opacity);
    transition: opacity 0.2s;
    background: none;
    border: none;
    cursor: pointer;
}

.bottom-nav-item:hover,
.bottom-nav-item.active {
    opacity: var(--nav-active-opacity);
}

.bottom-nav-item svg {
    width: 24px;
    height: 24px;
}

/* ==========================================
   Responsive Utilities
   ========================================== */
.md-hidden {
    display: block;
}

.md-visible {
    display: none;
}

/* Legacy Filters Section - kept for backwards compatibility */
.filters {
    background-color: var(--surface-color);
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.filter-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-row>* {
    flex: 1;
}

input,
select {
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

.btn {
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
}

.btn-secondary {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

/* Main Content */
main {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
    /* Account for bottom nav on mobile */
    padding-bottom: calc(15px + var(--bottom-nav-height));
}

.auction-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
    max-width: 1200px;
    margin: 0 auto;
}

/* Auction Card */
.card {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-color);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: var(--border-color);
}

.card-content {
    padding: 15px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.card-title {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    /* Truncate text */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.card-price {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-top: auto;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 500;
    background-color: var(--border-color);
    color: var(--text-secondary);
    margin-right: 5px;
}

.status-urgent {
    background-color: rgba(209, 52, 56, 0.15);
    color: var(--danger-color);
}

[data-theme="dark"] .status-urgent {
    background-color: rgba(255, 107, 107, 0.2);
}

/* Loading & Empty States */
.loader,
.message {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
    grid-column: 1 / -1;
}

.hidden {
    display: none !important;
}

/* ==========================================
   Statistics Dashboard
   ========================================== */
.stats-dashboard {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Summary Cards Row */
.stats-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.stat-card {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
}

.stat-card-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-card-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Chart Containers */
.chart-container {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}

.chart-title {
    margin: 0 0 16px 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Horizontal Bar Charts */
.bar-chart {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.bar-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.bar-label {
    flex: 0 0 140px;
    font-size: 0.85rem;
    color: var(--text-primary);
    text-align: right;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.bar-track {
    flex: 1;
    height: 24px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 4px;
    min-width: 2px;
    transition: width 0.3s ease;
}

.bar-value {
    flex: 0 0 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-align: left;
}

/* Stats Table */
.stats-table-wrapper {
    overflow-x: auto;
}

.stats-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.stats-table th,
.stats-table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.stats-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stats-table td {
    color: var(--text-primary);
}

.stats-table tbody tr:hover {
    background-color: var(--border-color);
}

/* Health badges */
.health-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

.health-badge.status-healthy {
    background-color: rgba(16, 185, 129, 0.15);
    color: #10b981;
}

.health-badge.status-empty {
    background-color: rgba(209, 52, 56, 0.15);
    color: var(--danger-color);
}

[data-theme="dark"] .health-badge.status-healthy {
    background-color: rgba(16, 185, 129, 0.2);
    color: #34d399;
}

/* Responsive: stack summary cards on mobile */
@media (max-width: 767px) {
    .stats-summary {
        grid-template-columns: repeat(2, 1fr);
    }

    .bar-label {
        flex: 0 0 90px;
        font-size: 0.8rem;
    }

    .bar-value {
        flex: 0 0 40px;
        font-size: 0.8rem;
    }

    .stat-card-value {
        font-size: 1.4rem;
    }
}

@media (max-width: 400px) {
    .stats-summary {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .stat-card {
        padding: 14px 10px;
    }
}

/* Grouping Features (Phase 2) */

/* Override grid to allow vertical stacking of groups */
.auction-grid {
    display: block;
    /* Reset previous grid properties if necessary, though block overrides grid display */
}

/* Responsive mini-grid for items inside categories */
.auction-grid-mini {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
    padding: 10px;
}

/* Group Containers */
details.group-site,
details.group-category {
    margin-bottom: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-background);
    overflow: hidden;
}

/* Site Level */
details.group-site {
    box-shadow: 0 1px 3px var(--shadow-color);
}

summary.summary-site {
    background-color: var(--background-color);
    padding: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    gap: 10px;
    align-items: center;
    list-style: none;
}

/* Category Level */
details.group-category {
    margin: 10px;
    border: 1px solid var(--border-color);
}

summary.summary-category {
    padding: 0.8rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    list-style: none;
}

.group-site-content {
    background-color: var(--surface-color);
    padding: 5px 0;
}

/* Custom Expand/Collapse Icons */
summary::-webkit-details-marker {
    display: none;
}

summary::after {
    content: '+';
    font-size: 1.2rem;
    color: var(--primary-color);
}

details[open]>summary::after {
    content: '-';
}

/* Count Badge */
.badge-count {
    background-color: var(--primary-color);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.85rem;
}

.card-location {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Header Actions & Theme Toggle */
.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    padding: 8px;
    cursor: pointer;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
    width: 40px;
    height: 40px;
}

.icon-btn:hover {
    background-color: var(--border-color);
}

.icon-btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Theme toggle icon visibility */
.icon-sun { display: none; }
.icon-moon { display: block; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* Vendor Icons */
.vendor-icon {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    vertical-align: middle;
}

/* SVG vendor icons inherit text color */
svg.vendor-icon {
    fill: currentColor;
}

/* Image vendor icons (ICO/PNG) */
img.vendor-icon {
    object-fit: contain;
    border-radius: 2px;
}

/* Input styling for dark mode */
input,
select {
    background-color: var(--surface-color);
    color: var(--text-primary);
}

input::placeholder {
    color: var(--text-secondary);
}

/* Modern card improvements */
.card {
    border-radius: 8px;
}

.card:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Responsive Breakpoints */
@media (max-width: 767px) {
    .filter-row {
        flex-direction: column;
    }

    .filter-row > * {
        flex: none !important;
        width: 100%;
    }

    main {
        padding: 10px;
        padding-bottom: calc(10px + var(--bottom-nav-height));
    }

    .auction-grid-mini {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 8px;
    }

    .card-image {
        height: 180px;
    }

    /* Search panel full width on mobile */
    .search-row {
        flex-direction: column;
    }

    .search-row > * {
        min-width: 100%;
    }
}

@media (min-width: 768px) {
    /* Show desktop nav */
    .desktop-nav {
        display: flex;
    }

    .search-toggle-btn {
        display: flex;
    }

    /* Hide mobile elements */
    .mobile-menu-btn {
        display: none;
    }

    .mobile-menu {
        display: none !important;
    }

    .bottom-nav {
        display: none;
    }

    /* Reset main padding */
    main {
        padding-bottom: 15px;
    }

    /* Responsive utilities */
    .md-hidden {
        display: none;
    }

    .md-visible {
        display: block;
    }

    .auction-grid-mini {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }

    /* Search panel dropdown style */
    .search-panel {
        position: relative;
    }
}

@media (min-width: 1024px) {
    .auction-grid-mini {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 20px;
    }
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}

/* ==========================================
   Authentication UI
   ========================================== */
.auth-signin-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: background-color 0.2s;
    white-space: nowrap;
}

.auth-signin-btn:hover {
    background-color: var(--primary-hover);
}

.auth-user-menu {
    position: relative;
}

.auth-user-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 10px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.85rem;
    transition: background-color 0.2s;
}

.auth-user-btn:hover {
    background-color: var(--border-color);
}

.auth-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
}

.auth-user-name {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.auth-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px var(--shadow-color);
    min-width: 140px;
    z-index: 100;
    overflow: hidden;
}

.auth-dropdown.open {
    display: block;
}

.auth-dropdown-item {
    display: block;
    width: 100%;
    padding: 10px 16px;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.auth-dropdown-item:hover {
    background-color: var(--border-color);
}

/* Mobile auth items */
.mobile-menu-user {
    padding: 8px 12px;
}

.mobile-menu-user-name {
    display: block;
    padding: 8px 12px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

/* Hide auth sign-in on mobile header (use mobile menu instead) */
@media (max-width: 767px) {
    .auth-signin-btn {
        display: none;
    }
    .auth-user-menu {
        display: none;
    }
}

/* Focus visible styles */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

/* ==========================================
   Alerts Panel
   ========================================== */
.alerts-panel {
    display: none;
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 16px;
}

.alerts-panel.open {
    display: block;
}

.alerts-panel-content {
    max-width: 1400px;
    margin: 0 auto;
}

.alerts-panel-title {
    margin: 0 0 12px 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.alerts-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 8px;
}

.alerts-empty {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.alert-rule-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 12px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

.alert-rule-desc {
    font-size: 0.9rem;
    color: var(--text-primary);
}

.alert-rule-delete {
    background: none;
    border: none;
    color: var(--danger-color);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
    line-height: 1;
}

.alert-rule-delete:hover {
    background-color: rgba(209, 52, 56, 0.15);
}

.alerts-divider {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 12px 0;
}

.alerts-form-title {
    margin: 0 0 10px 0;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.alerts-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.alerts-form-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.alerts-form-row label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    min-width: 100px;
}

.alerts-form-row select,
.alerts-form-row input {
    flex: 1;
    min-width: 120px;
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    background-color: var(--surface-color);
    color: var(--text-primary);
}

.alerts-form-row select:focus,
.alerts-form-row input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 120, 212, 0.2);
}

.alerts-form-actions {
    display: flex;
    gap: 8px;
    margin-top: 4px;
}

.alerts-form-actions .btn {
    padding: 8px 20px;
    border-radius: 6px;
}

/* Alerts Badge */
.alerts-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 9px;
    background-color: var(--danger-color);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1;
    margin-left: 4px;
}

/* ==========================================
   Toast Notifications
   ========================================== */
.toast-container {
    position: fixed;
    bottom: 80px;
    right: 16px;
    z-index: 9999;
    display: flex;
    flex-direction: column-reverse;
    gap: 8px;
    pointer-events: none;
    max-width: 360px;
}

.toast {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
    padding: 12px 16px;
    box-shadow: 0 4px 16px var(--shadow-color);
    pointer-events: auto;
    opacity: 0;
    transform: translateX(100%);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast.toast-visible {
    opacity: 1;
    transform: translateX(0);
}

.toast-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.toast-body {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

@media (min-width: 768px) {
    .toast-container {
        bottom: 24px;
        right: 24px;
    }

    /* Alerts panel dropdown style */
    .alerts-panel {
        position: relative;
    }
}

@media (max-width: 767px) {
    .alerts-form-row {
        flex-direction: column;
        align-items: stretch;
    }

    .alerts-form-row label {
        min-width: auto;
    }

    .alerts-form-row select,
    .alerts-form-row input {
        min-width: 100%;
    }
}

/* ==========================================
   Watchlist Badge
   ========================================== */
.watchlist-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 9px;
    background-color: var(--danger-color);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1;
    margin-left: 4px;
}

/* ==========================================
   Watchlist Heart Button (Card Overlay)
   ========================================== */
.card {
    position: relative;
}

.watchlist-heart-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    z-index: 10;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.45);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    padding: 0;
    transition: background-color 0.2s, transform 0.15s;
}

.watchlist-heart-btn:hover {
    background-color: rgba(0, 0, 0, 0.65);
    transform: scale(1.1);
}

.watchlist-heart-btn svg {
    width: 18px;
    height: 18px;
}

.watchlist-heart-btn.watchlist-heart-active {
    color: var(--danger-color);
    background-color: rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] .watchlist-heart-btn.watchlist-heart-active {
    background-color: rgba(45, 45, 45, 0.9);
}

.watchlist-heart-btn.watchlist-heart-active:hover {
    background-color: rgba(255, 255, 255, 1);
}

[data-theme="dark"] .watchlist-heart-btn.watchlist-heart-active:hover {
    background-color: rgba(45, 45, 45, 1);
}

/* ==========================================
   Price Change Indicators
   ========================================== */
.price-change-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 6px;
    vertical-align: middle;
}

.price-change-badge.price-up {
    background-color: rgba(209, 52, 56, 0.15);
    color: var(--danger-color);
}

.price-change-badge.price-down {
    background-color: rgba(16, 185, 129, 0.15);
    color: #10b981;
}

[data-theme="dark"] .price-change-badge.price-up {
    background-color: rgba(255, 107, 107, 0.2);
    color: #ff6b6b;
}

[data-theme="dark"] .price-change-badge.price-down {
    background-color: rgba(16, 185, 129, 0.2);
    color: #34d399;
}

/* ==========================================
   Watchlist Page
   ========================================== */
.watchlist-page {
    max-width: 1200px;
    margin: 0 auto;
}

.watchlist-page-title {
    margin: 0 0 16px 0;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.watchlist-empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.watchlist-empty-state svg {
    opacity: 0.4;
    margin-bottom: 12px;
}

.watchlist-empty-state p {
    margin: 4px 0;
    font-size: 1rem;
}

.watchlist-empty-hint {
    font-size: 0.9rem !important;
    opacity: 0.7;
}

/* Ending soon highlight */
.watchlist-card.watchlist-ending-soon {
    border: 2px solid var(--danger-color);
    animation: pulse-border 2s ease-in-out infinite;
}

@keyframes pulse-border {
    0%, 100% { border-color: var(--danger-color); }
    50% { border-color: transparent; }
}

.watchlist-card .card-price {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
}

/* ==========================================
   Item Detail Page
   ========================================== */
.detail-main {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.detail-back {
    margin-bottom: 16px;
}

.detail-back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
}

.detail-back-link:hover {
    text-decoration: underline;
}

.detail-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.detail-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
}

.detail-image-section {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.detail-image {
    width: 100%;
    max-height: 500px;
    object-fit: contain;
    border-radius: 6px;
    background-color: var(--border-color);
}

.detail-info-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.detail-title {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

.detail-price-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.detail-price {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.detail-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 0.85rem;
    font-weight: 500;
    background-color: var(--border-color);
    color: var(--text-secondary);
}

.detail-meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.detail-meta-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.detail-meta-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.detail-meta-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.detail-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

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

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

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background-color: var(--border-color);
}

.detail-bid-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 1rem;
    border-radius: 8px;
    text-decoration: none;
}

.detail-description-section {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
}

.detail-section-title {
    margin: 0 0 12px 0;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
}

.detail-description {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-word;
}

/* Similar Items */
.detail-similar-section {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
}

.similar-items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.similar-card {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.similar-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.similar-card-image {
    width: 100%;
    height: 140px;
    object-fit: cover;
    background-color: var(--border-color);
}

.similar-card-content {
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.similar-card-title {
    margin: 0;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.similar-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.similar-card-price {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary-color);
}

.similar-card-site {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.similar-card-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Detail page responsive */
@media (max-width: 767px) {
    .detail-layout {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 16px;
    }

    .detail-title {
        font-size: 1.2rem;
    }

    .detail-price {
        font-size: 1.4rem;
    }

    .detail-actions {
        flex-direction: column;
    }

    .detail-bid-btn {
        justify-content: center;
    }

    .similar-items-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}

/* ==========================================
   Saved Searches
   ========================================== */
.saved-searches {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
}

.saved-searches:empty {
    display: none;
}

.saved-searches-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.saved-search-item {
    display: inline-flex;
    align-items: center;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
}

.saved-search-load {
    background: none;
    border: none;
    padding: 4px 10px;
    font-size: 0.85rem;
    color: var(--primary-color);
    cursor: pointer;
    font-weight: 500;
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.saved-search-load:hover {
    text-decoration: underline;
}

.saved-search-delete {
    background: none;
    border: none;
    border-left: 1px solid var(--border-color);
    padding: 4px 8px;
    font-size: 1rem;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
}

.saved-search-delete:hover {
    color: var(--danger-color);
    background-color: rgba(209, 52, 56, 0.1);
}

/* ==========================================
   Sort Select
   ========================================== */
.sort-select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    background-color: var(--surface-color);
    color: var(--text-primary);
    cursor: pointer;
    margin-left: auto;
}

.sort-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 120, 212, 0.2);
}

/* ==========================================
   Autocomplete
   ========================================== */
.autocomplete-wrapper {
    position: relative;
    flex: 1;
    min-width: 140px;
}

.autocomplete-wrapper input {
    width: 100%;
}

.autocomplete-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 6px 6px;
    box-shadow: 0 4px 12px var(--shadow-color);
    max-height: 280px;
    overflow-y: auto;
}

.ac-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    font-size: 0.9rem;
    color: var(--text-primary);
    cursor: pointer;
    gap: 8px;
}

.ac-item:hover,
.ac-item.ac-active {
    background-color: var(--border-color);
}

.ac-item strong {
    color: var(--primary-color);
    font-weight: 700;
}

.ac-type {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background-color: var(--background-color);
    padding: 2px 6px;
    border-radius: 4px;
    flex-shrink: 0;
}

/* Analytics empty state */
.analytics-empty {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 0.5rem 0;
}

/* ==========================================
   Account Page: Collapsible Region Groups
   ========================================== */
.region-group {
    border: 1px solid var(--border-color, #ddd);
    border-radius: 6px;
    margin-bottom: 8px;
    overflow: hidden;
}

.region-group summary.region-header {
    padding: 10px 14px;
    cursor: pointer;
    background: var(--surface-color, #fff);
    list-style: none;
    display: flex;
    align-items: center;
    gap: 8px;
    user-select: none;
}

.region-group summary.region-header::-webkit-details-marker {
    display: none;
}

.region-group summary.region-header::before {
    content: "\25B6";
    font-size: 0.7em;
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.region-group[open] summary.region-header::before {
    transform: rotate(90deg);
}

.region-group .region-count {
    font-weight: normal;
    color: var(--text-secondary, #666);
    font-size: 0.85em;
}

.region-sites {
    padding: 4px 14px 10px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 4px;
}

.site-checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 4px 0;
}

.site-checkbox-label.site-locked {
    opacity: 0.5;
    cursor: not-allowed;
}

.site-checkbox-label input[type="checkbox"] {
    flex-shrink: 0;
}

#account-status {
    transition: opacity 0.3s ease;
}