:root {
    --primary: #2453ff;
    --primary-dark: #1a3ecc;
    --bg: #f4f6fb;
    --card-bg: #ffffff;
    --border: #e2e6f0;
    --text: #222834;
    --muted: #6b7280;
    --danger: #dc2626;
    --success: #16a34a;
    --radius: 8px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.sidebar {
    width: 220px;
    background: #171c2b;
    color: #cfd5e6;
    flex-shrink: 0;
    padding: 20px 0;
}
.sidebar .brand {
    font-weight: 700;
    font-size: 18px;
    color: #fff;
    padding: 0 20px 20px;
    border-bottom: 1px solid #2a3149;
    margin-bottom: 10px;
}
.sidebar a {
    display: block;
    padding: 10px 20px;
    color: #cfd5e6;
}
.sidebar a:hover, .sidebar a.active {
    background: #232a41;
    color: #fff;
    text-decoration: none;
}
.sidebar .section-label {
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: .06em;
    color: #6b7492;
    padding: 16px 20px 6px;
}

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

.topbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.topbar .user-info { color: var(--muted); font-size: 14px; }

.content { padding: 24px; }

/* ---------- Cards / tables ---------- */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}
.card h2, .card h3 { margin-top: 0; }

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
}
.page-header h1 { margin: 0; font-size: 22px; }

table { width: 100%; border-collapse: collapse; }
th, td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}
th { color: var(--muted); font-weight: 600; background: #fafbfd; }
tr:hover td { background: #f8faff; }

/* ---------- Forms ---------- */
label { display: block; margin-bottom: 4px; font-weight: 600; font-size: 13px; color: #374151; }
.form-group { margin-bottom: 14px; }
input[type=text], input[type=email], input[type=password], input[type=number],
input[type=date], input[type=tel], select, textarea {
    width: 100%;
    padding: 9px 11px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    background: #fff;
    color: var(--text);
}
textarea { min-height: 90px; resize: vertical; }
.form-row { display: flex; gap: 16px; }
.form-row .form-group { flex: 1; }
.checkbox-list { display: flex; flex-wrap: wrap; gap: 10px; }
.checkbox-list label { font-weight: 400; display: flex; align-items: center; gap: 6px; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-block;
    padding: 9px 16px;
    border-radius: 6px;
    border: 1px solid var(--primary);
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn-secondary { background: #fff; color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: #f2f4f8; }
.btn-danger { background: #fff; color: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: #fef2f2; }
.btn-sm { padding: 5px 10px; font-size: 13px; }

/* ---------- Misc ---------- */
.badge { padding: 3px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-active { background: #dcfce7; color: #166534; }
.badge-inactive { background: #fee2e2; color: #991b1b; }

.flash { padding: 12px 16px; border-radius: 6px; margin-bottom: 18px; font-size: 14px; }
.flash-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.flash-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }

.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #171c2b, #2453ff);
}
.login-box {
    background: #fff;
    padding: 36px 32px;
    border-radius: 10px;
    width: 340px;
    box-shadow: 0 20px 50px rgba(0,0,0,.25);
}
.login-box h1 { font-size: 20px; margin-bottom: 4px; }
.login-box p.sub { color: var(--muted); font-size: 13px; margin-top: 0; margin-bottom: 20px; }

.empty-state { text-align: center; padding: 40px 20px; color: var(--muted); }
.muted { color: var(--muted); }
.text-right { text-align: right; }