:root {
    --bg: #0b0d12;
    --surface: #12151c;
    --surface-2: #1a1f2b;
    --border: #2a3142;
    --text: #e8ecf4;
    --muted: #8b95a8;
    --accent: #4f7cff;
    --accent-2: #22c55e;
    --danger: #ef4444;
    --radius: 12px;
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
    font-family: "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    background: radial-gradient(circle at top, #151a28, var(--bg) 55%);
    color: var(--text);
    min-height: 100vh;
}

.admin-shell { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.sidebar {
    background: rgba(18, 21, 28, 0.95);
    border-right: 1px solid var(--border);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.brand { display: flex; gap: 0.75rem; align-items: center; }
.brand-mark {
    width: 42px; height: 42px; border-radius: 10px;
    background: linear-gradient(135deg, var(--accent), #7c3aed);
    display: grid; place-items: center; font-weight: 700;
}
.brand small, .muted { color: var(--muted); display: block; }
.nav { display: flex; flex-direction: column; gap: 0.35rem; flex: 1; }
.nav-link {
    color: var(--muted); text-decoration: none; padding: 0.65rem 0.8rem;
    border-radius: 8px; transition: 0.15s ease;
}
.nav-link:hover, .nav-link.active { background: var(--surface-2); color: var(--text); }
.sidebar-footer { border-top: 1px solid var(--border); padding-top: 1rem; }
.user-chip span { display: block; font-weight: 600; }
.logout-link { color: var(--muted); font-size: 0.9rem; }

.content { padding: 1.5rem 2rem; }
.topbar h1 { margin: 0 0 1.25rem; font-size: 1.6rem; }

.stats-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem; margin-bottom: 1.5rem;
}
.report-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem; margin-bottom: 1rem;
}
.data-table.compact td { padding: 0.45rem 0.6rem; }
.stat-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 1rem 1.1rem; box-shadow: var(--shadow);
}
.stat-card strong { font-size: 1.8rem; display: block; }
.panel {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow);
}

.auth-page {
    min-height: 100vh; display: grid; place-items: center; padding: 2rem;
}
.auth-card {
    width: min(420px, 100%); background: var(--surface);
    border: 1px solid var(--border); border-radius: 16px;
    padding: 2rem; box-shadow: var(--shadow);
}
.auth-card h1 { margin-top: 0; }
.field { margin-bottom: 1rem; }
.field label { display: block; margin-bottom: 0.35rem; color: var(--muted); font-size: 0.9rem; }
.field input {
    width: 100%; padding: 0.75rem 0.9rem; border-radius: 8px;
    border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
}
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 0.75rem 1.1rem; border: 0; border-radius: 8px;
    background: linear-gradient(135deg, var(--accent), #3b5bdb);
    color: white; font-weight: 600; cursor: pointer; width: 100%;
}
.alert {
    padding: 0.75rem 0.9rem; border-radius: 8px; margin-bottom: 1rem;
    background: rgba(239, 68, 68, 0.12); border: 1px solid rgba(239, 68, 68, 0.35);
    color: #fecaca;
}
.badge {
    display: inline-block; padding: 0.2rem 0.55rem; border-radius: 999px;
    font-size: 0.75rem; background: rgba(79, 124, 255, 0.15); color: #a5b8ff;
}
.badge-success { background: rgba(34, 197, 94, 0.15); color: #86efac; }
.badge-warn { background: rgba(251, 191, 36, 0.15); color: #fcd34d; }
.badge-danger { background: rgba(239, 68, 68, 0.15); color: #fca5a5; }
.badge-muted { background: rgba(139, 149, 168, 0.15); color: #94a3b8; }

.toolbar { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; margin-bottom: 1rem; }
.toolbar form { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }
.toolbar input, .toolbar select {
    padding: 0.55rem 0.75rem; border-radius: 8px; border: 1px solid var(--border);
    background: var(--surface-2); color: var(--text);
}
.btn-sm { width: auto; padding: 0.45rem 0.85rem; font-size: 0.85rem; }
.btn-secondary { background: var(--surface-2); border: 1px solid var(--border); color: var(--text); }
.btn-danger { background: linear-gradient(135deg, #ef4444, #dc2626); }
.btn-success { background: linear-gradient(135deg, #22c55e, #16a34a); }

.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.data-table th, .data-table td { padding: 0.65rem 0.75rem; border-bottom: 1px solid var(--border); text-align: left; }
.data-table th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }
.data-table tr:hover td { background: rgba(255,255,255,0.02); }
.data-table .actions { display: flex; gap: 0.4rem; flex-wrap: wrap; }

.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.form-grid .field-full { grid-column: 1 / -1; }
.field textarea, .field select {
    width: 100%; padding: 0.75rem 0.9rem; border-radius: 8px;
    border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
}
.field select { cursor: pointer; }
.checkbox-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 0.5rem; }
.checkbox-item { display: flex; align-items: center; gap: 0.5rem; font-size: 0.9rem; }
.alert-success { padding: 0.75rem; border-radius: 8px; margin-bottom: 1rem; background: rgba(34,197,94,0.12); border: 1px solid rgba(34,197,94,0.35); color: #86efac; }
.alert-info { padding: 0.75rem; border-radius: 8px; margin-bottom: 1rem; background: rgba(79,124,255,0.12); border: 1px solid rgba(79,124,255,0.35); color: #a5b8ff; }
.empty-state { color: var(--muted); padding: 2rem; text-align: center; }

@media (max-width: 900px) {
    .admin-shell { grid-template-columns: 1fr; }
    .sidebar { display: none; }
}