:root {
  --bg: #0f1420;
  --panel: #1a2130;
  --border: #2c3648;
  --text: #d8dee9;
  --muted: #8b96a8;
  --accent: #4f9cf9;
  --warn-bg: #3a3020;
  --warn-border: #8a7430;
  --warn-text: #f0d47a;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  padding: 24px;
  max-width: 900px;
  margin: 0 auto;
}

h1 { font-size: 1.5rem; margin-bottom: 16px; }
h2 { font-size: 1.1rem; }

.warnings { display: flex; flex-direction: column; gap: 8px; margin-bottom: 24px; }

.warning-card {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--warn-text);
  font-size: 0.9rem;
}

.warning-card code, .hint code, #yaml-output {
  font-family: "SF Mono", Consolas, "Courier New", monospace;
}

main { display: flex; flex-direction: column; gap: 24px; }

.form-area, .output-area {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}

.field { margin-bottom: 18px; }
.field:last-child { margin-bottom: 0; }

label { display: block; font-weight: 600; margin-bottom: 6px; }
.req { color: #e06c75; }

input[type="text"], input[type="number"], select {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.95rem;
}

input:focus, select:focus { outline: none; border-color: var(--accent); }

.radio-group { display: flex; gap: 20px; }
.radio { font-weight: 400; display: flex; align-items: center; gap: 6px; margin-bottom: 0; }

.checkbox-label { font-weight: 400; display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }

.hint { color: var(--muted); font-size: 0.85rem; margin-top: 6px; }
.warning-text { color: var(--warn-text); }

.rule-row { display: flex; gap: 10px; margin-bottom: 10px; align-items: center; }
.rule-row select { width: 130px; flex-shrink: 0; }
.rule-row input { flex: 1; }
.rule-row .remove-btn {
  background: none; border: none; color: #e06c75; cursor: pointer;
  font-size: 1.1rem; padding: 4px 8px;
}

.btn {
  border: none; border-radius: 6px; padding: 8px 16px;
  cursor: pointer; font-size: 0.9rem;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.secondary { background: var(--border); color: var(--text); }
.btn:hover { filter: brightness(1.15); }

.title-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.lang-btn { padding: 4px 12px; font-weight: 600; }

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

#yaml-output {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  font-size: 0.85rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
  min-height: 120px;
}

.validate-actions { margin-top: 16px; }

footer { margin-top: 32px; text-align: center; color: var(--muted); font-size: 0.8rem; }

.hidden { display: none; }