:root {
    --bg: #f4f6fb;
    --surface: #ffffff;
    --border: #e2e6f0;
    --text: #1b2140;
    --text-muted: #6b7280;
    --primary: #4338ca;
    --primary-dark: #3730a3;
    --accent: #06b6d4;
    --success: #059669;
    --success-bg: #ecfdf5;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --warning: #d97706;
    --warning-bg: #fffbeb;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(27, 33, 64, 0.08), 0 1px 2px rgba(27, 33, 64, 0.04);
}

* { box-sizing: border-box; }

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

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

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

.sidebar {
    width: 240px;
    flex-shrink: 0;
    background: linear-gradient(180deg, #201f4a 0%, #14133a 100%);
    color: #e5e7f5;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; padding: 0 8px; }
.brand-mark { width: 32px; height: 32px; border-radius: 9px; background: linear-gradient(135deg, var(--accent), var(--primary)); flex-shrink: 0; }

.nav-group { display: flex; flex-direction: column; gap: 4px; }
.nav-link {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 12px; border-radius: 8px;
    color: #c7c9e8; font-size: 0.92rem; font-weight: 500;
}
.nav-link:hover { background: rgba(255,255,255,0.08); text-decoration: none; color: #fff; }
.nav-link.active { background: rgba(255,255,255,0.14); color: #fff; }

.sidebar-footer { margin-top: auto; font-size: 0.8rem; color: #8688b3; padding: 0 8px; }

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

.topbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 32px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.topbar h1 { font-size: 1.25rem; margin: 0; }
.topbar-user { display: flex; align-items: center; gap: 12px; font-size: 0.9rem; color: var(--text-muted); }

.content { padding: 32px; flex: 1; }

.card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    box-shadow: var(--shadow); padding: 24px; margin-bottom: 24px;
}
.card h2 { margin-top: 0; font-size: 1.05rem; }

.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 9px 18px; border-radius: 8px; border: none;
    font-weight: 600; font-size: 0.9rem; cursor: pointer;
    background: var(--primary); color: #fff; transition: background .15s ease;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #b91c1c; }
.btn-secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg); }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }

form { margin: 0; }
.form-group { margin-bottom: 16px; }
label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=date], select, input[type=file] {
    width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
    font-size: 0.92rem; background: #fff; color: var(--text);
}
input:focus, select:focus { outline: 2px solid var(--primary); outline-offset: 1px; }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 20px; font-size: 0.9rem; }
.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid #a7f3d0; }
.alert-error { background: var(--danger-bg); color: var(--danger); border: 1px solid #fecaca; }

table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--text-muted); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: .03em; }
tr:hover td { background: #fafbff; }

.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.badge-admin { background: #ede9fe; color: #6d28d9; }
.badge-user { background: #e0f2fe; color: #0369a1; }
.badge-active { background: var(--success-bg); color: var(--success); }
.badge-inactive { background: #f3f4f6; color: #6b7280; }

.progress { background: #eef0f8; border-radius: 999px; height: 10px; overflow: hidden; }
.progress-bar { height: 100%; background: linear-gradient(90deg, var(--accent), var(--primary)); }
.progress-bar.danger { background: var(--danger); }
.progress-bar.warning { background: var(--warning); }

.filters { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; align-items: flex-end; }
.filters .form-group { margin-bottom: 0; min-width: 160px; }

.stat-row { display: flex; gap: 20px; margin-bottom: 24px; flex-wrap: wrap; }
.stat { flex: 1; min-width: 200px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; box-shadow: var(--shadow); }
.stat .value { font-size: 1.6rem; font-weight: 700; }
.stat .label { font-size: 0.82rem; color: var(--text-muted); }

.guest-wrapper {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    background: radial-gradient(circle at top left, #2b2a63, #14133a 60%);
    padding: 20px;
}
.guest-card {
    width: 100%; max-width: 380px; background: var(--surface); border-radius: 16px;
    padding: 36px 32px; box-shadow: 0 20px 60px rgba(0,0,0,0.35);
}
.guest-card .brand { color: var(--text); margin-bottom: 24px; }
.guest-card .btn { width: 100%; justify-content: center; margin-top: 8px; }

@media (max-width: 860px) {
    .app-shell { flex-direction: column; }
    .sidebar { width: 100%; flex-direction: row; overflow-x: auto; }
    .sidebar-footer { display: none; }
    .content { padding: 20px; }
}