:root, [data-theme="dark"] {
    --bg-page: #0f172a;
    --bg-card: #1e293b;
    --bg-card-alt: #334155;
    --border-color: #334155;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --header-bg: #090d16;
    --nav-bg: #131d2e;
    --input-bg: #0f172a;
    --code-bg: rgba(255, 255, 255, 0.08);
    --table-hover: rgba(255, 255, 255, 0.02);
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

[data-theme="light"] {
    --bg-page: #edf2f7;
    --bg-card: #ffffff;
    --bg-card-alt: #e2e8f0;
    --border-color: #cbd5e1;
    --text-main: #0f172a;
    --text-muted: #334155;
    --header-bg: #ffffff;
    --nav-bg: #f8fafc;
    --input-bg: #ffffff;
    --code-bg: #e2e8f0;
    --table-hover: #f1f5f9;
    --accent: #4f46e5;
    --accent-hover: #4338ca;
    --danger: #dc2626;
    --success: #16a34a;
    --warning: #d97706;
    --card-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.12), 0 1px 2px -1px rgba(0, 0, 0, 0.08);
}

.alert-success {
    background: #ecfdf5;
    border: 1px solid #10b981;
    color: #065f46;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

[data-theme="dark"] .alert-success {
    background: rgba(16, 185, 129, 0.18);
    border: 1px solid #10b981;
    color: #a7f3d0;
}

.alert-error {
    background: #fef2f2;
    border: 1px solid #ef4444;
    color: #991b1b;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

[data-theme="dark"] .alert-error {
    background: rgba(239, 68, 68, 0.18);
    border: 1px solid #ef4444;
    color: #fca5a5;
}

.alert-info {
    background: #eff6ff;
    border: 1px solid #3b82f6;
    color: #1e40af;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1.25rem;
    font-weight: 500;
}

[data-theme="dark"] .alert-info {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid #3b82f6;
    color: #93c5fd;
}

body {
    margin: 0;
    padding: 0;
    background: var(--bg-page);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.admin-header {
    background: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.admin-nav {
    display: flex;
    gap: 0.5rem;
    padding: 0.6rem 1.5rem;
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    align-items: center;
    position: relative;
    z-index: 50;
}

.nav-tab {
    padding: 0.45rem 0.85rem;
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 600;
    border-radius: 6px;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.15s ease;
    cursor: pointer;
    background: transparent;
    border: none;
    font-size: 0.9rem;
}

.nav-tab:hover {
    color: var(--text-main);
    background: rgba(125, 125, 125, 0.1);
}

.nav-tab.active {
    color: #ffffff;
    background: var(--accent);
}

/* Nav Dropdown Styles */
.nav-dropdown {
    position: relative;
    display: inline-block;
}

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    min-width: 220px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.25);
    padding: 0.4rem;
    z-index: 1000;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
    display: block;
}

.nav-dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 6px;
    transition: background 0.15s ease;
}

.nav-dropdown-item:hover {
    background: var(--bg-hover);
    color: var(--accent);
}

.nav-dropdown-item.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent);
    font-weight: 700;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 1.5rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--card-shadow);
}

.form-input, .form-textarea, .form-select {
    width: 100%;
    box-sizing: border-box;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.55rem 0.75rem;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: border-color 0.15s ease;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
    outline: none;
    border-color: var(--accent);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.45rem 0.85rem;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    border: 1px solid transparent;
    text-decoration: none;
    transition: all 0.15s ease;
}

.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--bg-card-alt); color: var(--text-main); border-color: var(--border-color); }
.btn-secondary:hover { opacity: 0.9; }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { filter: brightness(0.9); }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { filter: brightness(0.9); }

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

.table th, .table td {
    padding: 0.75rem 0.85rem;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
}

.table th {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 600;
}

.table tr:hover td {
    background: var(--table-hover);
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

code {
    background: var(--code-bg);
    color: var(--text-main);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.85em;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.theme-toggle-btn {
    background: var(--bg-card-alt);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 6px;
    padding: 0.4rem 0.65rem;
    cursor: pointer;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-weight: 600;
}
.theme-toggle-btn:hover {
    border-color: var(--accent);
}