:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --sidebar-bg: #161b22;
  --border: #2d3a4d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --primary: #58a6ff;
  --primary-hover: #79b8ff;
  --danger: #f85149;
  --success: #3fb950;
  --radius: 8px;
  --font: "Segoe UI", "Noto Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

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

.sidebar {
  width: 200px;
  min-width: 200px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 0;
}

.sidebar-title {
  padding: 0 20px 16px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

.menu {
  flex: 1;
}

.menu-item {
  display: block;
  padding: 10px 20px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.menu-item:hover {
  color: var(--primary);
  background: rgba(88, 166, 255, 0.08);
}

.menu-item.active {
  color: #fff;
  font-weight: 500;
  border-right: 2px solid var(--primary);
  margin-right: -1px;
  background: var(--primary);
}

.menu-item.active:hover {
  color: #fff;
  background: var(--primary-hover);
}

.sidebar-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
}

.sidebar-footer a {
  color: var(--primary);
  text-decoration: none;
}

.sidebar-footer a:hover {
  text-decoration: underline;
}

.content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 24px 32px;
}

.page-header {
  margin-bottom: 20px;
}

.page-header h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
}

.main {
  flex: 1;
}

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

.card h2 {
  margin: 0 0 16px;
  font-size: 1.15rem;
  font-weight: 600;
}

.card .hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: -8px 0 12px;
}

.field {
  margin-bottom: 14px;
}

.field label {
  display: block;
  margin-bottom: 4px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.field-hint {
  display: block;
  margin-top: 4px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.field input[type="text"],
.field input[type="email"] {
  width: 100%;
  max-width: 400px;
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 1rem;
}

.btn {
  padding: 10px 18px;
  border-radius: 6px;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  font-family: inherit;
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

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

.btn.primary:hover:not(:disabled) {
  background: var(--primary-hover);
}

.btn.secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn.secondary:hover:not(:disabled) {
  background: var(--border);
}

.btn.small {
  padding: 6px 12px;
  font-size: 0.85rem;
}

.btn-loading {
  display: none;
}

.btn-loading:not([hidden]) {
  display: inline;
}

.btn-text[hidden] {
  display: none;
}

.result {
  margin-top: 16px;
  padding: 12px;
  border-radius: 6px;
  font-size: 0.9rem;
  white-space: pre-line;
}

.result.success {
  background: rgba(63, 185, 80, 0.15);
  color: var(--success);
}

.result.error {
  background: rgba(248, 81, 73, 0.15);
  color: var(--danger);
}

.table-wrap {
  overflow-x: auto;
  margin-top: 12px;
}

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

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

.cert-table th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.85rem;
}

.cert-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.cert-table .col-domain {
  font-weight: 500;
  color: var(--primary);
}

.cert-table .col-actions {
  white-space: nowrap;
}

.cert-table .col-actions .btn {
  margin-right: 6px;
}

.cert-table .status {
  font-size: 0.8rem;
  padding: 2px 8px;
  border-radius: 4px;
}

.cert-table .status.success {
  background: rgba(63, 185, 80, 0.2);
  color: var(--success);
}

.cert-table .status.error,
.cert-table .status.failed {
  background: rgba(248, 81, 73, 0.2);
  color: var(--danger);
}

.cert-empty {
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  .layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    min-width: 0;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    padding: 12px 16px;
    gap: 8px;
  }

  .sidebar-title {
    width: 100%;
    margin-bottom: 8px;
    padding-bottom: 8px;
  }

  .menu {
    display: flex;
    flex: 1;
    gap: 4px;
  }

  .menu-item {
    padding: 8px 12px;
  }

  .menu-item.active {
    border-right: none;
    border-bottom: 2px solid var(--primary);
    margin-right: 0;
    margin-bottom: -2px;
  }

  .sidebar-footer {
    border-top: none;
    padding: 0;
  }

  .content {
    padding: 16px;
  }

  .cert-table th,
  .cert-table td {
    padding: 8px;
    font-size: 0.85rem;
  }
}