:root {
  color-scheme: dark;
  --bg: #0d1117;
  --panel: #161b22;
  --border: #30363d;
  --text: #c9d1d9;
  --dim: #8b949e;
  --accent: #7ee787;
  --yellow: #e3b341;
  --magenta: #d2a8ff;
  --cyan: #79c0ff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  line-height: 1.6;
}

.wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

header h1 {
  font-size: 1.6rem;
  margin: 0 0 6px;
}

.tagline {
  color: var(--dim);
  margin: 0 0 24px;
  font-size: 0.9rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  white-space: pre-wrap;
  font-size: 0.95rem;
  overflow-x: auto;
}

.form-section {
  margin-top: 24px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
}

.form-section h2 {
  font-size: 1rem;
  margin: 0 0 12px;
  font-weight: normal;
  color: var(--dim);
}

.type-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.type-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 6px;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
}

.type-btn.selected {
  border-color: var(--accent);
  color: var(--accent);
}

textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 10px;
  font-family: inherit;
  font-size: 0.9rem;
  resize: vertical;
}

button#submit-btn {
  margin-top: 10px;
  width: 100%;
  padding: 10px;
  background: var(--accent);
  color: #0d1117;
  border: none;
  border-radius: 6px;
  font-weight: bold;
  cursor: pointer;
  font-family: inherit;
}

button#submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.msg {
  color: var(--dim);
  font-size: 0.85rem;
  min-height: 1.2em;
}

.msg.error { color: #ff7b72; }
.msg.success { color: var(--accent); }

.history-section {
  margin-top: 24px;
}

#toggle-history {
  background: none;
  border: 1px solid var(--border);
  color: var(--dim);
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
}

.history-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  font-size: 0.85rem;
}

.history-list li {
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  color: var(--dim);
}

.history-list li span.author {
  color: var(--cyan);
}

footer {
  margin-top: 40px;
  color: var(--dim);
  font-size: 0.8rem;
}

footer a { color: var(--cyan); }