:root {
    --bg: #f4f6f9;
    --surface: #ffffff;
    --surface2: #eef2f7;
    --text: #1a1a2e;
    --text-muted: #666;
    --primary: #2f80ed;
    --primary-dark: #1c60c7;
    --accent: #198754;
    --danger: #dc3545;
    --border: #ccc;
    --table-head: #cfe2ff;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --radius: 10px;
}

[data-theme="dark"] {
    --bg: #0f1419;
    --surface: #1a2332;
    --surface2: #243044;
    --text: #e8ecf1;
    --text-muted: #9aa5b4;
    --primary: #4a9eff;
    --primary-dark: #2d7dd2;
    --accent: #3dd68c;
    --danger: #ff6b7a;
    --border: #3a4556;
    --table-head: #2a3a52;
    --shadow: 0 2px 12px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }

body {
    font-family: "Segoe UI", Arial, sans-serif;
    margin: 0;
    background: var(--bg);
    color: var(--text);
    transition: background 0.2s, color 0.2s;
}

.hidden { display: none !important; }

.topbar {
    display: flex;
    gap: 6px;
    padding: 10px;
    background: var(--primary);
    flex-wrap: wrap;
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar button {
    flex: 1;
    min-width: 90px;
    padding: 10px 8px;
    border: none;
    color: white;
    background: var(--primary-dark);
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
}

.topbar button.active {
    background: white;
    color: var(--primary-dark);
    font-weight: 600;
}

.header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 8px;
}

.header-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}

.header-actions button, .btn {
    padding: 8px 12px;
    border: none;
    border-radius: 8px;
    background: var(--primary-dark);
    color: #fff;
    cursor: pointer;
    font-size: 13px;
}

.btn-secondary { background: #6c757d; }
.btn-success { background: var(--accent); }
.btn-danger { background: var(--danger); }
.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--surface2);
    cursor: pointer;
    font-size: 18px;
}

.container { padding: 10px; max-width: 1400px; margin: 0 auto; }

.card {
    background: var(--surface);
    padding: 14px;
    border-radius: var(--radius);
    margin-bottom: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.card h3 { margin-top: 0; }

label {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 8px;
}

input, select {
    width: 100%;
    padding: 8px;
    margin: 4px 0 8px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-size: 14px;
    background: var(--surface2);
    color: var(--text);
}

input:focus, select:focus {
    outline: 2px solid var(--primary);
    border-color: var(--primary);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}

th, td {
    border: 1px solid var(--border);
    padding: 8px 6px;
    text-align: left;
}

th { background: var(--table-head); }

.table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 10px;
    margin-bottom: 16px;
}

.stat-box {
    background: var(--surface2);
    border-radius: var(--radius);
    padding: 14px;
    text-align: center;
}

.stat-box .value {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
}

.stat-box .label {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

.lan-card {
    border: 2px solid var(--primary);
}

.lan-card a { color: var(--primary); }

.hint {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.5;
}

#loginModule {
    max-width: 400px;
    margin: 40px auto;
}

.error-text { color: var(--danger); }

@media (max-width: 768px) {
    .topbar button { min-width: 70px; font-size: 12px; padding: 8px 4px; }
    .header-bar { flex-direction: column; align-items: stretch; }
    .summary-grid { grid-template-columns: 1fr 1fr; }
    table { font-size: 11px; }
    th, td { padding: 6px 4px; }
}

.row-warn td { background: rgba(220, 53, 69, 0.15); }

@media (max-width: 480px) {
    .summary-grid { grid-template-columns: 1fr; }
    .container { padding: 6px; }
}