:root {
    --bg: #0f1419;
    --surface: #1a2332;
    --surface2: #243044;
    --border: #2d3a4f;
    --text: #e8edf4;
    --muted: #8b9bb4;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #22c55e;
    --danger: #ef4444;
    --radius: 10px;
    --sidebar-w: 240px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    color: var(--accent-hover);
}

.admin-body {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 1.25rem 0;
}

.sidebar-brand {
    padding: 0 1.25rem 1.25rem;
    font-weight: 700;
    font-size: 1rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1rem;
}

.sidebar-nav a {
    display: block;
    padding: 0.65rem 1.25rem;
    color: var(--muted);
    border-left: 3px solid transparent;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: var(--text);
    background: var(--surface2);
    border-left-color: var(--accent);
}

.admin-wrap {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.topbar-user {
    color: var(--muted);
    font-size: 0.9rem;
}

.main-content {
    padding: 1.5rem;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

.page-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.page-header h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.card h2 {
    margin: 0 0 1rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--surface2);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    border: 1px solid var(--border);
}

.stat-card .label {
    color: var(--muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.stat-card .value {
    font-size: 1.75rem;
    font-weight: 700;
    margin-top: 0.25rem;
}

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

.data-table th,
.data-table td,
.info-table th,
.info-table td {
    padding: 0.65rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th,
.info-table th {
    color: var(--muted);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.data-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.text-center {
    text-align: center;
}

.badge {
    display: inline-block;
    background: var(--surface2);
    padding: 0.15rem 0.5rem;
    border-radius: 6px;
    font-size: 0.8rem;
}

.status-active {
    color: var(--success);
    font-weight: 600;
}

.status-inactive {
    color: var(--danger);
    font-weight: 600;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

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

.btn-secondary {
    background: var(--surface2);
    color: var(--text);
    border: 1px solid var(--border);
}

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

.btn-success {
    background: var(--success);
    color: #052e16;
}

.btn-small {
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
    border-radius: 6px;
    background: var(--surface2);
    border: 1px solid var(--border);
    color: var(--text);
    margin-right: 0.35rem;
}

.btn-small:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.alert-success {
    background: rgba(34, 197, 94, 0.15);
    border: 1px solid var(--success);
    color: #86efac;
}

.alert-error {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid var(--danger);
    color: #fca5a5;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.8rem;
    color: var(--muted);
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 0.5rem 0.65rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font: inherit;
}

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

.form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    max-width: 640px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.modal-content .close {
    position: absolute;
    top: 0.75rem;
    right: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--muted);
    line-height: 1;
}

.modal-content h2 {
    margin: 0 0 1rem;
    font-size: 1.15rem;
}

code {
    font-family: ui-monospace, monospace;
    font-size: 0.85em;
    background: var(--bg);
    padding: 0.15rem 0.35rem;
    border-radius: 4px;
}

.notes-section {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.card-actions {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* Login page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.login-card {
    width: 100%;
    max-width: 400px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
}

.login-card h1 {
    margin: 0 0 0.5rem;
    font-size: 1.35rem;
}

.login-card p {
    margin: 0 0 1.5rem;
    color: var(--muted);
    font-size: 0.9rem;
}

.login-card .form-group {
    margin-bottom: 1rem;
}

@media (max-width: 700px) {
    .admin-body {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    .sidebar-nav {
        display: flex;
        flex-wrap: wrap;
        gap: 0.25rem;
    }

    .sidebar-nav a {
        border-left: none;
        border-radius: 6px;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }
}