:root {
    color-scheme: light;
    --bg: #f4f5f7;
    --card: #ffffff;
    --text: #1f2430;
    --muted: #6b7280;
    --border: #e2e4e9;
    --accent: #2563eb;
    --accent-contrast: #ffffff;
    --danger: #dc2626;
    --success: #16a34a;
}

* { box-sizing: border-box; }

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

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 24px;
    background: var(--card);
    border-bottom: 1px solid var(--border);
}

.topbar nav a {
    margin-left: 16px;
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
}

.topbar nav a:hover { color: var(--accent); }

.container {
    max-width: 960px;
    margin: 32px auto;
    padding: 0 16px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 24px;
}

.login-wrap {
    display: flex;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
}

.login-wrap .card { width: 100%; max-width: 360px; }

h1 { font-size: 20px; margin: 0 0 16px; }

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }

input[type=text], input[type=password], select {
    width: 100%;
    padding: 8px 10px;
    margin-bottom: 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
}

button, .btn {
    display: inline-block;
    background: var(--accent);
    color: var(--accent-contrast);
    border: none;
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
}

button.danger, .btn.danger { background: var(--danger); }
button.secondary, .btn.secondary { background: var(--muted); }

table { width: 100%; border-collapse: collapse; margin-top: 12px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--muted); font-weight: 600; }

.badge { padding: 2px 8px; border-radius: 999px; font-size: 12px; }
.badge.ok { background: #dcfce7; color: var(--success); }
.badge.off { background: #fee2e2; color: var(--danger); }

.alert { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.alert.error { background: #fee2e2; color: var(--danger); }
.alert.success { background: #dcfce7; color: var(--success); }