:root {
    --bg: #f4f7fb;
    --nav: #102033;
    --nav-dark: #0b1928;
    --blue: #0b78d0;
    --green: #229447;
    --text: #16202d;
    --muted: #667085;
    --border: #d8dee8;
    --card: #ffffff;
}

* { box-sizing: border-box; }

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

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

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

.sidebar {
    width: 260px;
    background: linear-gradient(180deg, var(--nav), var(--nav-dark));
    color: #fff;
    padding: 24px 14px;
    display: flex;
    flex-direction: column;
}

.brand { padding: 0 10px 32px; }
.brand-title { font-size: 23px; font-weight: 800; }
.brand-version { margin-top: 5px; color: #9fb0c4; font-size: 13px; }

.nav a {
    display: block;
    padding: 13px 16px;
    border-radius: 8px;
    margin-bottom: 7px;
    color: #dce7f4;
}

.nav a.active,
.nav a:hover {
    background: rgba(255,255,255,.12);
    color: #fff;
}

.sidebar-footer {
    margin-top: auto;
    color: #9fb0c4;
    font-size: 13px;
    padding: 10px;
}

.main { flex: 1; padding: 34px; }
.topbar { margin-bottom: 24px; }
.topbar h1 { margin: 0; font-size: 30px; }

.cards {
    display: grid;
    grid-template-columns: repeat(4, minmax(160px, 1fr));
    gap: 18px;
    margin-bottom: 24px;
}

.card,
.panel {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(16,32,51,.08);
    padding: 22px;
}

.card-label { color: var(--muted); font-size: 14px; }
.card-value { font-size: 34px; font-weight: 800; margin: 8px 0; }
.card-value.ok { color: var(--green); }
.card p, .panel p { color: var(--muted); line-height: 1.55; }

.panel h2 { margin-top: 0; }

.info-table { width: 100%; border-collapse: collapse; }
.info-table th,
.info-table td {
    text-align: left;
    padding: 12px;
    border-bottom: 1px solid var(--border);
}
.info-table th { width: 180px; background: #f8fafc; }

@media (max-width: 1000px) {
    .layout { display: block; }
    .sidebar { width: auto; }
    .cards { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
    .main { padding: 20px; }
    .cards { grid-template-columns: 1fr; }
}