:root {
  --bg: #f2f4f7;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --line: #d1d5db;
  --accent: #0f766e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(180deg, #fafaf9, var(--bg));
  color: var(--text);
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 16px 48px;
}

h1 {
  margin: 0;
  font-size: 2rem;
}

.subtitle {
  margin: 6px 0 20px;
  color: var(--muted);
}

.controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

input,
button {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.95rem;
}

button {
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}

.status {
  padding: 10px 12px;
  border-radius: 8px;
  background: #e6fffa;
  color: #134e4a;
  margin-bottom: 14px;
}

.results {
  display: grid;
  gap: 12px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.83rem;
  color: #1f2937;
}

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