:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4f;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #22c55e;
  --error: #ef4444;
  --radius: 12px;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(160deg, #0f1419 0%, #162032 50%, #0f1419 100%);
  color: var(--text);
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

header h1 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  font-weight: 600;
}

.subtitle {
  margin: 0;
  color: var(--muted);
}

.health {
  margin-top: 1rem;
  font-size: 0.875rem;
}

.health.ok {
  color: var(--success);
}

.health.warn {
  color: #f59e0b;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-top: 1.25rem;
}

.upload-zone {
  border-style: dashed;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.upload-zone.dragover {
  border-color: var(--accent);
  background: rgba(59, 130, 246, 0.08);
}

.upload-inner {
  text-align: center;
}

.upload-title {
  margin: 0 0 0.25rem;
  font-weight: 500;
}

.upload-hint {
  margin: 0 0 1rem;
  font-size: 0.875rem;
  color: var(--muted);
}

.file-name {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  color: var(--accent);
  word-break: break-all;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
}

textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 0.9375rem;
  resize: vertical;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.btn {
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn.primary {
  background: var(--accent);
  color: white;
}

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

.btn.secondary {
  background: var(--border);
  color: var(--text);
}

.btn.secondary:hover:not(:disabled) {
  background: #3d4f6a;
}

.status {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
}

.status.loading {
  background: rgba(59, 130, 246, 0.15);
  color: #93c5fd;
}

.status.error {
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
}

.status.ok {
  background: rgba(34, 197, 94, 0.15);
  color: #86efac;
}

select {
  width: 100%;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 0.9375rem;
}

.template-desc {
  margin: 0.5rem 0 0;
  font-size: 0.8125rem;
  color: var(--muted);
}

.hidden {
  display: none !important;
}

.results h2 {
  margin: 0 0 1rem;
  font-size: 1.125rem;
}

.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.tab {
  padding: 0.375rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: 0.8125rem;
  cursor: pointer;
}

.tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.output {
  margin: 0;
  padding: 1rem;
  max-height: 480px;
  overflow: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.8125rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}