:root {
    --sidebar-w: 220px;
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --bg: #f4f5f9;
    --card-bg: #ffffff;
    --text: #1f2430;
    --muted: #6b7280;
    --border: #e5e7eb;
    --danger: #dc2626;
    --success: #16a34a;
}

* { box-sizing: border-box; }

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

a { text-decoration: none; color: inherit; }

/* ---------- Login page ---------- */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,.08);
    width: 100%;
    max-width: 380px;
}

.login-card h1 {
    font-size: 22px;
    margin: 0 0 4px;
}

.login-card p.subtitle {
    color: var(--muted);
    margin: 0 0 24px;
    font-size: 14px;
}

.field { margin-bottom: 16px; }

.field label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--muted);
}

.field input, select, textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    background: #fff;
    color: var(--text);
}

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

.btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}

.btn:hover { background: var(--primary-dark); }
.btn-block { width: 100%; }

.alert {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 16px;
}
.alert-error { background: #fee2e2; color: #991b1b; }
.alert-success { background: #dcfce7; color: #166534; }

/* ---------- App shell ---------- */
.app {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-w);
    background: #1e1b2e;
    color: #fff;
    padding: 20px 0;
    flex-shrink: 0;
}

.sidebar .brand {
    font-size: 18px;
    font-weight: 700;
    padding: 0 20px 20px;
    border-bottom: 1px solid rgba(255,255,255,.1);
    margin-bottom: 10px;
}

.sidebar nav a {
    display: block;
    padding: 12px 20px;
    color: #cbd5e1;
    font-size: 14px;
}

.sidebar nav a:hover, .sidebar nav a.active {
    background: rgba(255,255,255,.08);
    color: #fff;
}

.main { flex: 1; min-width: 0; }

.topbar {
    background: #fff;
    padding: 16px 28px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar h2 { margin: 0; font-size: 18px; }

.content { padding: 28px; }

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid var(--border);
}

.card .label { color: var(--muted); font-size: 13px; margin-bottom: 6px; }
.card .value { font-size: 26px; font-weight: 700; }

.panel {
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 20px;
    margin-bottom: 24px;
}

.panel h3 { margin-top: 0; font-size: 16px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 12px;
    background: #eef2ff;
    color: var(--primary-dark);
}

.form-row { display: flex; gap: 16px; }
.form-row .field { flex: 1; }

.logout-link { font-size: 13px; color: var(--muted); }
.link-btn { background: none; border: none; color: var(--primary); cursor: pointer; font-size: 13px; padding: 0; }