:root {
    --bg: #f1f5f9;
    --surface: #ffffff;
    --text: #0f172a;
    --muted: #64748b;
    --border: #e2e8f0;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --danger: #dc2626;
    --success: #16a34a;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.brand {
    font-weight: 700;
    color: var(--text);
    white-space: nowrap;
}

.nav {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.nav a {
    color: var(--muted);
    padding: 8px 12px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 0.9rem;
}

.nav a.active, .nav a:hover {
    color: var(--primary);
    background: #eff6ff;
    text-decoration: none;
}

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

.lang-form { display: flex; gap: 4px; }

.lang-btn {
    border: 1px solid var(--border);
    background: var(--surface);
    padding: 4px 8px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.75rem;
}

.lang-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 20px 48px;
}

.main-auth {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 0px);
}

.page-header { margin-bottom: 24px; }
.page-header-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.page-header h1 { font-size: 1.75rem; margin-bottom: 4px; }
.run-check-hint { margin: -12px 0 20px; font-size: 0.85rem; }
.run-check-form { flex-shrink: 0; }

.auto-check-status {
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--muted);
    white-space: nowrap;
}
.auto-check-checking {
    color: var(--primary);
    border-color: #bfdbfe;
    background: #eff6ff;
}
.auto-check-error {
    color: var(--danger);
    border-color: #fecaca;
    background: #fef2f2;
}
.auto-check-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    max-width: 360px;
    padding: 12px 16px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 1000;
    font-size: 0.9rem;
    background: var(--surface);
    border: 1px solid var(--border);
}
.auto-check-toast-success { border-color: #bbf7d0; background: #dcfce7; color: #166534; }
.auto-check-toast-error { border-color: #fecaca; background: #fef2f2; color: #991b1b; }
.auto-check-toast[hidden] { display: none; }

.admin-alerts {
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: var(--radius);
    padding: 14px 16px;
    margin-bottom: 20px;
}
.admin-alerts-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    gap: 12px;
}
.admin-alerts-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 8px;
}
.admin-alert {
    font-size: 0.9rem;
    padding: 8px 10px;
    border-radius: 6px;
    background: #fff;
    border: 1 solid #fde68a;
}
.admin-alert-rate_limit {
    border-color: #fca5a5;
    background: #fef2f2;
    color: #991b1b;
}
.admin-alert-error {
    border-color: #fecaca;
    background: #fef2f2;
}
.admin-alert-time {
    display: block;
    font-size: 0.75rem;
    color: var(--muted);
    margin-bottom: 2px;
}
.muted { color: var(--muted); }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card, .card, .auth-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
}

.stat-label { color: var(--muted); font-size: 0.875rem; display: block; }
.stat-value { font-size: 2rem; font-weight: 700; color: var(--primary); }

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.card h2 { font-size: 1.1rem; margin-bottom: 16px; }

.table-wrap { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

th, td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; }

.empty { text-align: center; color: var(--muted); }

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.75rem;
    background: #eff6ff;
    color: var(--primary);
}

.badge-active { background: #dcfce7; color: var(--success); }
.badge-muted { background: #f1f5f9; color: var(--muted); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid transparent;
    font-size: 0.9rem;
    cursor: pointer;
    text-decoration: none;
    background: var(--surface);
    color: var(--text);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover { background: var(--primary-hover); }

.btn-danger {
    background: #fef2f2;
    color: var(--danger);
    border-color: #fecaca;
}

.btn-ghost {
    background: transparent;
    border-color: var(--border);
}

.btn-sm { padding: 4px 10px; font-size: 0.8rem; }
.btn-block { width: 100%; }

.form { display: grid; gap: 16px; }
.form-inline {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    align-items: end;
}

label {
    display: grid;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: 500;
}

input, select, textarea {
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
    width: 100%;
}

fieldset {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    display: grid;
    gap: 12px;
}

legend { font-weight: 600; padding: 0 6px; }

.checkbox { display: flex; align-items: center; gap: 8px; }

.captcha-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

.captcha-img {
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
}

.auth-card {
    width: 100%;
    max-width: 420px;
}

.auth-card h1 { margin-bottom: 8px; }

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.alert-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.alert-error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

.form-message { margin-top: 8px; font-size: 0.875rem; }
.form-message.success { color: var(--success); }
.form-message.error { color: var(--danger); }

.actions { display: flex; gap: 6px; flex-wrap: wrap; }

@media (max-width: 900px) {
    .grid-2 { grid-template-columns: 1fr; }
    .topbar-inner { flex-wrap: wrap; height: auto; padding: 12px 16px; }
    .nav { order: 3; width: 100%; }
}

@media (max-width: 600px) {
    .form-inline { grid-template-columns: 1fr; }
    .main { padding: 16px; }
}