:root {
  --bg: #f5f3ee;
  --panel: #ffffff;
  --text: #202020;
  --muted: #777;
  --line: #ded9cf;
  --accent: #111111;
  --soft: #f0ede6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app {
  width: min(960px, calc(100% - 32px));
  margin: 32px auto;
}

.hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 13px;
}

h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.05;
}

.subtitle {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.badge {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  font-size: 13px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 20px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.04);
  margin-bottom: 18px;
}

.controls {
  display: grid;
  gap: 14px;
}

label {
  font-weight: 700;
  font-size: 14px;
}

select, input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 13px 14px;
  font-size: 16px;
  background: #fff;
  color: var(--text);
}

select:focus, input:focus, textarea:focus {
  outline: 2px solid rgba(0,0,0,0.12);
  border-color: #222;
}

.project-info {
  display: grid;
  gap: 10px;
  padding: 14px;
  background: var(--soft);
  border-radius: 18px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

button {
  border: 1px solid var(--accent);
  background: #fff;
  color: var(--accent);
  border-radius: 999px;
  padding: 12px 18px;
  font-size: 15px;
  cursor: pointer;
  transition: transform 0.12s ease, opacity 0.12s ease;
}

button:hover {
  transform: translateY(-1px);
}

button.primary {
  background: var(--accent);
  color: #fff;
}

button.ghost {
  border-color: var(--line);
  color: var(--muted);
}

.output-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

h2 {
  margin: 0 0 12px;
  font-size: 20px;
}

#status {
  color: var(--muted);
  font-size: 13px;
}

textarea {
  min-height: 560px;
  resize: vertical;
  font-family: "SFMono-Regular", Consolas, "Noto Sans Mono CJK TC", monospace;
  line-height: 1.65;
  white-space: pre;
}

@media (max-width: 640px) {
  .app { width: min(100% - 20px, 960px); margin: 18px auto; }
  .hero { flex-direction: column; }
  .panel { border-radius: 18px; padding: 16px; }
  .button-row button { flex: 1 1 100%; }
  textarea { min-height: 520px; font-size: 14px; }
}