/* 现代简洁样式 */
:root {
  --bg: #0f1220;
  --panel: #151a2e;
  --accent: #5ac8fa;
  --text: #e6e9f5;
  --muted: #aab1cc;
  --border: #2a3154;
  --danger: #ff6b6b;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: radial-gradient(1200px 600px at 10% 0%, #131733 0%, #0f1220 60%, #0b0e1a 100%);
  color: var(--text);
}

.app-header { padding: 24px; text-align: center; }
.app-header h1 { margin: 0 0 8px; font-size: 28px; }
.app-header p { margin: 0; color: var(--muted); }

.app-main { max-width: 1200px; margin: 0 auto; padding: 16px; }
.panel {
  background: linear-gradient(180deg, rgba(30,38,70,0.7), rgba(21,26,46,0.9));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 8px 28px rgba(0,0,0,0.25);
}
.panel h2 { margin-top: 0; }

textarea, input[type="text"] {
  width: 100%;
  background: #0c1020;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 12px;
  padding: 12px;
  outline: none;
}
textarea::placeholder { color: #6c7594; }

.actions { display: grid; grid-template-columns: 1fr; gap: 8px; margin-top: 8px; }
.checkbox { display: flex; align-items: center; gap: 8px; color: var(--muted); }
.checkbox input { width: 18px; height: 18px; }

.options-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
@media (min-width: 1100px) { .options-grid { grid-template-columns: repeat(3, 1fr); } }
.category h3 { margin: 0 0 8px; font-size: 16px; color: var(--muted); }
.options { display: grid; grid-template-columns: 1fr; gap: 6px; }
.option-item {
  display: flex; align-items: center; gap: 8px;
  background: #0c1020;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
}
.option-item input { width: 16px; height: 16px; }
.option-item label { flex: 1; display: flex; justify-content: space-between; }
.option-item .en { color: #7b84a5; font-size: 12px; }

.form-actions { display: flex; gap: 12px; margin-top: 12px; }
.btn {
  background: #111633;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 12px;
  cursor: pointer;
}
.btn:hover { border-color: #3a4270; }
.btn.primary {
  background: linear-gradient(90deg, #3a89ff, #5ac8fa);
  border: none; color: #0a0f22;
}
.btn.danger { background: #2a0f11; border-color: #7a1f25; color: #ffd8db; }
.btn.danger:hover { border-color: #a62f38; }
.panel-output { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 900px) { .panel-output { grid-template-columns: 1fr 1fr; } }
.output-box h2 { margin: 0 0 8px; }
.output-box button { margin-top: 8px; }

.app-footer { text-align: center; padding: 16px; color: var(--muted); }
.category { border: 1px dashed var(--border); border-radius: 12px; padding: 8px; }
.category-header { display: flex; align-items: center; justify-content: space-between; cursor: pointer; padding: 6px 8px; background: rgba(12,16,32,0.6); border-radius: 10px; border: 1px solid var(--border); }
.category-header h3 { margin: 0; font-size: 15px; }
.category-header .arrow { color: var(--muted); }
.category.collapsed .options { display: none; }
.category-actions { display: flex; align-items: center; gap: 8px; }
.btn.tiny { padding: 6px 8px; border-radius: 8px; font-size: 12px; }