:root {
    color-scheme: light dark;
    --border: #d0d7de;
    --muted: #6b7280;
    --success: #1a7f37;
    --danger: #b91c1c;
    --bg: #ffffff;
    --fg: #1f2328;
    --card-bg: #f6f8fa;
}

@media (prefers-color-scheme: dark) {
    :root {
        --border: #3d444d;
        --muted: #9ca3af;
        --success: #3fb950;
        --danger: #f85149;
        --bg: #0d1117;
        --fg: #e6edf3;
        --card-bg: #161b22;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--fg);
}

.topbar {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.topbar-brand { font-weight: 600; }
.topbar-nav { display: flex; gap: 1rem; flex: 1; }
.topbar-nav a { color: inherit; text-decoration: none; }
.topbar-nav a:hover { text-decoration: underline; }
.topbar-logout { display: flex; align-items: center; gap: 0.5rem; }

.container { max-width: 960px; margin: 0 auto; padding: 1.5rem; }

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.card-narrow { max-width: 480px; }

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

.table { width: 100%; border-collapse: collapse; }
.table th, .table td {
    text-align: left;
    padding: 0.5rem;
    border-bottom: 1px solid var(--border);
}

form label {
    display: block;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

form input[type=text], form input[type=email], form input[type=password], form input[type=date], form select, form textarea {
    display: block;
    width: 100%;
    margin-top: 0.25rem;
    padding: 0.4rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg);
    color: var(--fg);
}

label.checkbox { display: flex; align-items: center; gap: 0.5rem; }
label.checkbox input { width: auto; }

.btn, button[type=submit] {
    display: inline-block;
    background: #2563eb;
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
}

.btn-secondary { margin-left: 0.5rem; color: inherit; }

.inline-form { display: inline; }
.link-button {
    background: none;
    border: none;
    color: #2563eb;
    cursor: pointer;
    padding: 0;
    text-decoration: underline;
}
.link-danger { color: var(--danger); }

.actions { display: flex; gap: 0.75rem; align-items: center; }

.badge { padding: 0.15rem 0.5rem; border-radius: 999px; font-size: 0.8rem; }
.badge-success { background: color-mix(in srgb, var(--success) 20%, transparent); color: var(--success); }
.badge-muted { background: color-mix(in srgb, var(--muted) 20%, transparent); color: var(--muted); }

.alert { padding: 0.75rem 1rem; border-radius: 4px; margin-bottom: 1rem; }
.alert-success { background: color-mix(in srgb, var(--success) 15%, transparent); color: var(--success); }
.alert-error { background: color-mix(in srgb, var(--danger) 15%, transparent); color: var(--danger); }

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}
.stat-card { text-align: center; }
.stat-value { font-size: 2rem; font-weight: 700; }
.stat-label { color: var(--muted); font-size: 0.85rem; margin-top: 0.25rem; }

.filter-form {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: flex-end;
    margin-bottom: 1.25rem;
}
.filter-form label { margin-bottom: 0; min-width: 140px; }
.filter-form button { height: 2.3rem; }

.pagination {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-top: 1rem;
    color: var(--muted);
    font-size: 0.9rem;
}
.pagination a { color: #2563eb; }