:root {
  --bg: #0f1220;
  --card: #151a2e;
  --text: #f8fafc;
  --muted: #94a3b8;
  --accent: #7c3aed;
  --accent2: #22d3ee;
  --border: rgba(148, 163, 184, 0.2);
  --green: #22c55e;
  --yellow: #eab308;
  --red: #ef4444;
  --orange: #f97316;
}

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

body {
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background: radial-gradient(circle at top left, #1f2440, #0b0d18 65%);
  color: var(--text);
  min-height: 100vh;
  padding: 40px 24px;
}

.container {
  max-width: 800px;
  margin: 0 auto;
}

header {
  margin-bottom: 32px;
}

.back {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  display: inline-block;
  margin-bottom: 16px;
}

.back:hover {
  color: var(--accent2);
}

h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.subtitle {
  color: var(--muted);
  font-size: 1rem;
}

.input-section {
  background: rgba(21, 26, 46, 0.7);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
}

label {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 6px;
}

textarea {
  width: 100%;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: ui-monospace, monospace;
  resize: vertical;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.options {
  display: flex;
  gap: 24px;
  margin-top: 16px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  color: var(--text);
  font-size: 0.9rem;
}

.checkbox-label input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

.primary-btn {
  width: 100%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: white;
  border: none;
  border-radius: 8px;
  padding: 14px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 20px;
  transition: transform 0.15s, box-shadow 0.15s;
}

.primary-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.4);
}

.primary-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.results {
  margin-top: 24px;
}

.results.hidden {
  display: none;
}

.summary-bar {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.summary-stat {
  flex: 1;
  background: rgba(21, 26, 46, 0.7);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
}

.summary-stat.healthy { border-color: var(--green); }
.summary-stat.warning { border-color: var(--yellow); }
.summary-stat.error { border-color: var(--red); }

.stat-value {
  display: block;
  font-size: 2rem;
  font-weight: bold;
}

.summary-stat.healthy .stat-value { color: var(--green); }
.summary-stat.warning .stat-value { color: var(--yellow); }
.summary-stat.error .stat-value { color: var(--red); }

.stat-label {
  color: var(--muted);
  font-size: 0.85rem;
}

.results-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.result-card {
  background: rgba(21, 26, 46, 0.7);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  transition: border-color 0.2s;
}

.result-card.healthy { border-left: 4px solid var(--green); }
.result-card.warning { border-left: 4px solid var(--yellow); }
.result-card.error { border-left: 4px solid var(--red); }
.result-card.checking { border-left: 4px solid var(--muted); }

.result-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.status-icon {
  font-size: 1.2rem;
}

.result-url {
  flex: 1;
  font-family: ui-monospace, monospace;
  font-size: 0.9rem;
  color: var(--accent2);
  word-break: break-all;
}

.result-url a {
  color: inherit;
  text-decoration: none;
}

.result-url a:hover {
  text-decoration: underline;
}

.status-badge {
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.status-badge.healthy {
  background: rgba(34, 197, 94, 0.2);
  color: var(--green);
}

.status-badge.warning {
  background: rgba(234, 179, 8, 0.2);
  color: var(--yellow);
}

.status-badge.error {
  background: rgba(239, 68, 68, 0.2);
  color: var(--red);
}

.status-badge.checking {
  background: rgba(148, 163, 184, 0.2);
  color: var(--muted);
}

.result-details {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.detail-item {
  font-size: 0.85rem;
  color: var(--muted);
}

.detail-item span {
  color: var(--text);
}

.detail-item.good span { color: var(--green); }
.detail-item.warn span { color: var(--yellow); }
.detail-item.bad span { color: var(--red); }

.issues-list {
  margin-top: 12px;
  padding-left: 20px;
}

.issues-list li {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 4px 0;
}

.issues-list li.warn { color: var(--yellow); }
.issues-list li.error { color: var(--red); }

footer {
  margin-top: 48px;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

footer a {
  color: var(--accent2);
  text-decoration: none;
}

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

.note {
  margin-top: 8px;
  font-size: 0.75rem;
  opacity: 0.7;
}

@media (max-width: 600px) {
  .summary-bar {
    flex-wrap: wrap;
  }
  .summary-stat {
    flex: 1 1 45%;
  }
  .options {
    flex-direction: column;
    gap: 12px;
  }
}