:root {
    --bg: #f4f6fb;
    --card: #ffffff;
    --line: #d9dfed;
    --primary: #1e3a8a;
    --muted: #5f6b85;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, sans-serif; background: var(--bg); color: #111827; font-size: 13px; }
.login-body { display: flex; min-height: 100vh; align-items: center; justify-content: center; }
.login-box { width: 340px; background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 20px; }
.login-box h1 { margin: 0 0 6px; font-size: 22px; }
.subtitle { margin: 0 0 12px; color: var(--muted); }
.alert { background: #fee2e2; color: #991b1b; padding: 8px; border-radius: 6px; margin-bottom: 10px; }
.login-form { display: flex; flex-direction: column; gap: 8px; }
.login-form input, .login-form button { height: 34px; border: 1px solid var(--line); border-radius: 6px; padding: 0 10px; }
.login-form button { background: var(--primary); color: #fff; cursor: pointer; border-color: var(--primary); }
.hint { margin-top: 10px; color: var(--muted); font-size: 12px; }

.app-shell { display: flex; min-height: 100vh; }
.sidebar { width: 210px; background: #0f172a; color: #fff; padding: 14px; display: flex; flex-direction: column; gap: 12px; }
.brand { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.menu { display: flex; flex-direction: column; gap: 6px; }
.menu-item { color: #cbd5e1; text-decoration: none; padding: 8px 9px; border-radius: 6px; }
.menu-item.active, .menu-item:hover { background: #1e293b; color: #fff; }
.logout { margin-top: auto; color: #fecaca; text-decoration: none; font-size: 12px; }
.main { flex: 1; padding: 12px; overflow: auto; }
.topbar { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center; }
.page-title { font-size: 16px; font-weight: 700; }
.welcome { color: var(--muted); }
.content-card { margin-top: 10px; background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 12px; }
.metrics-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 8px; }
.metric { border: 1px solid var(--line); border-radius: 6px; background: #f9fbff; padding: 8px; display: flex; flex-direction: column; gap: 4px; }
.metric strong { font-size: 15px; }
.compact-note { margin-top: 10px; color: var(--muted); }
.module-head { font-weight: 700; margin-bottom: 10px; font-size: 14px; }
.compact-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 8px; }
.compact-item { border: 1px solid var(--line); border-radius: 6px; padding: 10px; text-decoration: none; color: #111827; display: flex; justify-content: space-between; align-items: center; }
.compact-item small { color: var(--muted); }
.compact-item:hover { background: #f9fbff; }
.compact-form { display: grid; gap: 8px; }
.form-row { display: grid; gap: 4px; }
.form-row input, .form-row textarea { border: 1px solid var(--line); border-radius: 6px; padding: 7px 8px; font-size: 13px; }
.btn-row { display: flex; align-items: center; gap: 10px; margin-top: 6px; }
.btn-primary { border: none; border-radius: 6px; background: var(--primary); color: #fff; padding: 8px 12px; cursor: pointer; }
.btn-link { color: var(--primary); text-decoration: none; }
.compact-table { width: 100%; border-collapse: collapse; margin: 8px 0; }
.compact-table th, .compact-table td { border: 1px solid var(--line); padding: 7px; text-align: left; }
.compact-table .num { text-align: right; }

@media (max-width: 980px) {
    .metrics-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .compact-list { grid-template-columns: 1fr; }
}