:root {
    --bg: #0f1419;
    --card: #1a212b;
    --text: #e6e9ee;
    --muted: #93a1b0;
    --accent: #3b82f6;
    --border: #2a3340;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 1rem;
    background: var(--card);
    border-bottom: 1px solid var(--border);
}

.brand { font-weight: 600; }
.topbar nav a { color: var(--muted); text-decoration: none; margin-left: 1rem; }
.topbar nav a:hover { color: var(--text); }

.container { max-width: 900px; margin: 0 auto; padding: 1rem; }

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem 1.2rem;
    margin-bottom: 1rem;
}

.login { max-width: 360px; margin: 3rem auto; }
.login label { display: block; margin: 0.8rem 0; }
.login input {
    width: 100%;
    padding: 0.6rem;
    margin-top: 0.3rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
}

button {
    background: var(--accent);
    color: #fff;
    border: 0;
    padding: 0.6rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
}

.table { width: 100%; border-collapse: collapse; }
.table th, .table td {
    text-align: left;
    padding: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.alerts { list-style: none; padding: 0; margin: 0; }
.alert { padding: 0.6rem 0.8rem; border-radius: 6px; margin-bottom: 0.5rem; background: var(--bg); border-left: 4px solid var(--accent); }

.muted { color: var(--muted); }
.error { color: #f87171; }

@media (max-width: 600px) {
    .container { padding: 0.6rem; }
    .card { padding: 0.8rem; }
}