/* Dark theme styles */
body.dark {
    --primary-color: #1a1a2e;
    --secondary-color: #16213e;
    --accent-color: #0f3460;
    --text-color: #e6e6e6;
    --hover-color: #2a3a5a;
    background-color: #121212;
    color: #e6e6e6;
}

body.dark .main-content {
    background-color: #121212;
    background-image:
        radial-gradient(ellipse 80% 60% at 10% 20%, rgba(15, 52, 96, 0.08) 0%, transparent 70%),
        radial-gradient(ellipse 60% 50% at 90% 80%, rgba(26, 26, 46, 0.12) 0%, transparent 70%);
}

body.dark .spread-header h1,
body.dark .coin-spread-header h1 {
    color: var(--text-color);
}

body.dark .spread-header h1 small,
body.dark .coin-spread-header p {
    color: #b3b3b3;
}

body.dark .sort-control label,
body.dark .favourite-filter label {
    color: #b3b3b3;
}

body.dark .view-btn {
    border-color: #333;
    color: #e6e6e6;
}

body.dark .view-btn:hover:not(.active) {
    background-color: #333;
}

body.dark .coin-spread-card,
body.dark .coin-spread-card .card-header,
body.dark .chart-container {
    background-color: #1e1e1e;
    border-color: #333;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3), 0 0 1px rgba(255, 255, 255, 0.04);
}

body.dark .card {
    background-color: #1e1e2e;
    border-color: #2d2d3d;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

body.dark .coin-spread-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4), 0 0 1px rgba(255, 255, 255, 0.06);
}

body.dark .form-label,
body.dark .form-control,
body.dark .form-select,
body.dark .coin-spread-select {
    color: #e6e6e6;
    background-color: #2d2d2d;
    border-color: #444;
}

body.dark .form-control:focus,
body.dark .form-select:focus,
body.dark .coin-spread-select:focus {
    background-color: #333;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.25rem rgba(15, 52, 96, 0.25);
}

body.dark .form-select option:checked,
body.dark .form-select option:active,
body.dark .coin-spread-select option:checked,
body.dark .coin-spread-select option:active {
    background-color: #3b82f6;
    color: #ffffff;
}

body.dark .form-control::placeholder {
    color: #888;
    opacity: 1;
}

body.dark .searchable-select-dropdown {
    background: #2d2d2d;
    border-color: #444;
}

body.dark .searchable-select-item {
    color: #e6e6e6;
}

body.dark .searchable-select-item:hover {
    background: #3d3d4d;
}

body.dark .loading-overlay {
    background: rgba(30, 30, 30, 0.9) !important;
}

body.dark .loading-overlay p {
    color: #e6e6e6;
}

body.dark #current-spread-info {
    background-color: rgba(15, 52, 96, 0.2);
    color: #e6e6e6;
}

body.dark .volume-info {
    color: #a0a0a0;
}

body.dark .login-card {
    background-color: #1e1e1e;
    color: #e6e6e6;
}

body.dark .login-title,
body.dark .form-label {
    color: #e6e6e6;
}

body.dark .login-message {
    color: #b3b3b3;
}

body.dark .user-dropdown {
    background-color: #2d2d2d;
    border: 1px solid #444;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

body.dark .dropdown-item {
    color: #e6e6e6;
}

body.dark .dropdown-item:hover {
    background-color: #3d3d3d;
}

body.dark .table-view {
    background-color: #1e1e1e;
    color: #e6e6e6;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

body.dark .table-view th,
body.dark .table-view td {
    border-color: #444;
}

body.dark .table-view tr:hover {
    background-color: #2d2d2d;
}

/* Subtle depth on header & sidebar */
body.dark .header {
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

body.dark .sidebar {
    box-shadow: 2px 0 12px rgba(0, 0, 0, 0.3);
}

body.dark .sidebar-nav a.active {
    box-shadow: 0 2px 8px rgba(15, 52, 96, 0.3);
}

/* Glow on focused inputs */
body.dark .form-control:focus,
body.dark .form-select:focus {
    box-shadow: 0 0 0 3px rgba(15, 52, 96, 0.25), 0 0 8px rgba(15, 52, 96, 0.1);
}

/* Subtle glow on buttons */
body.dark .btn-refresh {
    box-shadow: 0 2px 8px rgba(15, 52, 96, 0.3);
}

body.dark .btn-refresh:hover {
    box-shadow: 0 4px 16px rgba(15, 52, 96, 0.4);
}

body.dark .login-card {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}