:root {
    --bg: #f5f6f8;
    --card-bg: #ffffff;
    --border: #dde1e6;
    --text: #1f2430;
    --muted: #6b7280;
    --primary: #2563eb;
    --danger: #dc2626;
    --success: #15803d;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
}

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

.brand { font-weight: 700; }

.topbar nav { display: flex; gap: 1rem; flex: 1; }
.topbar nav a { color: var(--muted); text-decoration: none; padding: 0.4rem 0.2rem; }
.topbar nav a.active, .topbar nav a:hover { color: var(--primary); }

.logout-form { display: flex; align-items: center; gap: 0.5rem; }
.logout-form .user { color: var(--muted); font-size: 0.9rem; }

.container { max-width: 1100px; margin: 0 auto; padding: 1.5rem; }

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}
.card-narrow { max-width: 420px; margin: 2rem auto; }

label { display: block; margin-bottom: 1rem; font-size: 0.9rem; color: var(--muted); }
label input, label select { display: block; width: 100%; margin-top: 0.3rem; padding: 0.5rem; border: 1px solid var(--border); border-radius: 6px; font-size: 1rem; color: var(--text); }
label.checkbox { display: flex; align-items: center; gap: 0.5rem; }
label.checkbox input { width: auto; margin: 0; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

button, .button {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #fff;
    cursor: pointer;
    font-size: 0.95rem;
    text-decoration: none;
    color: var(--text);
}
button.primary, .button.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.link-danger { background: none; border: none; color: var(--danger); padding: 0; cursor: pointer; text-decoration: underline; }
.link-like { background: none; border: none; color: var(--primary); padding: 0.3rem 0; margin-left: 0.75rem; cursor: pointer; text-decoration: underline; font-size: 0.9rem; }

.form-actions { display: flex; gap: 0.75rem; align-items: center; margin-top: 1rem; }

.flash { padding: 0.75rem 1rem; border-radius: 6px; margin-bottom: 1rem; }
.flash-success { background: #dcfce7; color: var(--success); }
.flash-error { background: #fee2e2; color: var(--danger); }

.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 1.5rem 0; }
.stat { background: var(--card-bg); border: 1px solid var(--border); border-radius: 8px; padding: 1rem; text-align: center; }
.stat-value { display: block; font-size: 1.6rem; font-weight: 700; }
.stat-label { color: var(--muted); font-size: 0.85rem; }

.table { width: 100%; border-collapse: collapse; background: var(--card-bg); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.table th, .table td { padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--border); text-align: left; font-size: 0.9rem; }
.table th { background: #f0f1f4; color: var(--muted); font-weight: 600; }

.muted { color: var(--muted); }

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

.row-group { display: flex; gap: 0.5rem; margin-bottom: 0.5rem; align-items: center; }
.row-group select, .row-group input { padding: 0.4rem; border: 1px solid var(--border); border-radius: 6px; }

.badge { border-radius: 999px; padding: 0.2rem 0.7rem; font-size: 0.8rem; border: none; }
.badge-on { background: #dcfce7; color: var(--success); }
.badge-off { background: #f3f4f6; color: var(--muted); }

.inline-form { display: inline-block; }

.pagination { display: flex; gap: 1rem; align-items: center; margin-top: 1rem; }