:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface-hover: #243044;
  --border: #2d3a4f;
  --text: #e7ecf3;
  --text-muted: #8b9cb3;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #06b6d4;
  --radius: 10px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  margin-bottom: 2.5rem;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: linear-gradient(135deg, var(--primary), var(--info));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: var(--text-muted);
  margin-top: 0.5rem;
  font-size: 0.95rem;
}

.check-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.form-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
  min-width: 120px;
}

.form-group.flex-2 {
  flex: 2;
  min-width: 200px;
}

.form-group label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.form-group input,
.form-group select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.65rem 0.85rem;
  color: var(--text);
  font-size: 0.95rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
}

.btn-primary {
  width: 100%;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

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

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.error-box {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--danger);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  color: var(--danger);
  margin-bottom: 1.5rem;
}

.result-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.result-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

.elapsed {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.diagnosis-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
}

.diagnosis-card.success { background: rgba(34, 197, 94, 0.08); border-color: rgba(34, 197, 94, 0.3); }
.diagnosis-card.warning { background: rgba(245, 158, 11, 0.08); border-color: rgba(245, 158, 11, 0.3); }
.diagnosis-card.danger { background: rgba(239, 68, 68, 0.08); border-color: rgba(239, 68, 68, 0.3); }
.diagnosis-card.info { background: rgba(6, 182, 212, 0.08); border-color: rgba(6, 182, 212, 0.3); }

.diagnosis-icon {
  font-size: 1.75rem;
  line-height: 1;
  flex-shrink: 0;
}

.diagnosis-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.diagnosis-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.info-item {
  background: var(--bg);
  border-radius: 6px;
  padding: 0.75rem;
}

.info-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.info-value {
  font-size: 0.9rem;
  font-weight: 500;
}

.status-open { color: var(--success); }
.status-closed { color: var(--danger); }
.status-filtered { color: var(--warning); }
.status-unknown { color: var(--text-muted); }

.details-section h3 {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.details-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.details-list li {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-left: 1rem;
  position: relative;
}

.details-list li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--primary);
}

footer {
  margin-top: auto;
  padding-top: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}

@media (max-width: 600px) {
  .form-row {
    flex-direction: column;
  }
  .form-group.flex-2 {
    min-width: 100%;
  }
}