:root {
  --bg: #fff8e7;
  --card: #ffffff;
  --text: #2d3436;
  --muted: #738089;
  --primary: #ff6b35;
  --primary-d: #e85420;
  --accent: #004d99;
  --line: #ffe0cc;
  --ok: #2e9e5b;
  --err: #d64545;
  --info: #2b6cb0;
  --shadow: 0 8px 24px rgba(255, 152, 0, 0.16);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: radial-gradient(circle at 20% 0%, #ffe5cc 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.5;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 14px 40px;
}

.head { text-align: center; margin-bottom: 14px; }
.head h1 { margin: 0; font-size: 1.5rem; }
.sub { margin: 8px auto 0; color: var(--muted); font-size: 0.92rem; max-width: 42ch; }
code {
  background: #fff1db;
  padding: 1px 5px;
  border-radius: 5px;
  font-size: 0.88em;
  color: var(--primary-d);
}

/* 卡片 */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}
.lbl { display: block; font-weight: 700; font-size: 0.98rem; margin-bottom: 6px; }
.hint { margin: 8px 0 0; color: var(--muted); font-size: 0.85rem; }
.row { margin-bottom: 12px; }
.row:last-child { margin-bottom: 0; }

/* 文本框 */
textarea, input[type="text"], select {
  width: 100%;
  font-size: 1rem;
  padding: 12px;
  border: 2px solid var(--line);
  border-radius: 12px;
  background: #fffdf8;
  color: var(--text);
  outline: none;
  transition: border-color .15s;
}
textarea { resize: vertical; font-family: "SF Mono", "Consolas", monospace; line-height: 1.6; min-height: 140px; }
textarea:focus, input[type="text"]:focus, select:focus { border-color: var(--primary); }

/* 滑块 */
.slider-row input[type="range"] { width: 100%; accent-color: var(--primary); height: 28px; }
.val {
  float: right; font-weight: 600; color: var(--primary-d);
  background: #fff1db; padding: 1px 8px; border-radius: 8px; font-size: 0.85rem;
}

/* 步进器 */
.steppers { display: flex; gap: 12px; flex-wrap: wrap; }
.stepper { display: flex; align-items: center; gap: 6px; }
.stepper > span { font-size: 0.9rem; color: var(--muted); min-width: 2.5em; }
.stepper button {
  width: 38px; height: 38px; border-radius: 50%; border: none;
  background: var(--primary); color: #fff; font-size: 1.3rem; font-weight: 700;
  cursor: pointer; box-shadow: 0 3px 0 var(--primary-d); transition: transform .08s;
}
.stepper button:active { transform: translateY(3px); box-shadow: 0 0 0 var(--primary-d); }
.stepper input[type="number"] {
  width: 54px; text-align: center; padding: 8px 4px; font-size: 1.1rem; font-weight: 700;
}

/* 高级设置折叠 */
.adv-toggle {
  width: 100%; padding: 12px; margin-bottom: 0;
  background: #fff3e0; border: 1px solid var(--line); border-radius: 12px;
  color: var(--primary-d); font-weight: 700; font-size: 0.95rem; cursor: pointer;
}
.adv-toggle:active { background: #ffe7c7; }
.advanced { display: none; margin-top: 8px; }
.advanced.open { display: block; }
.grid2 { display: grid; gap: 12px; grid-template-columns: 1fr; }
@media (min-width: 560px) { .grid2 { grid-template-columns: 1fr 1fr; } }

/* 开关 */
.toggles { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 10px; }
.switch { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 0.92rem; }
.switch input { width: 20px; height: 20px; accent-color: var(--primary); }

/* 操作按钮 */
.actions { display: flex; gap: 10px; margin: 16px 0 10px; }
.btn-primary {
  flex: 1; padding: 16px 20px; font-size: 1.15rem; font-weight: 800;
  border: none; border-radius: 14px; background: var(--primary); color: #fff;
  cursor: pointer; box-shadow: 0 5px 0 var(--primary-d); transition: transform .08s;
  text-align: center; text-decoration: none; display: inline-flex; align-items: center; justify-content: center;
}
.btn-primary:active { transform: translateY(4px); box-shadow: 0 1px 0 var(--primary-d); }
.btn-primary:disabled { opacity: .55; transform: none; box-shadow: 0 5px 0 var(--primary-d); }
.btn-primary.small { flex: 0 0 auto; padding: 10px 16px; font-size: .95rem; }
.btn-ghost {
  flex: 0 0 auto; padding: 16px 18px; font-size: 1rem; font-weight: 700;
  border: 2px solid var(--line); border-radius: 14px; background: #fff; color: var(--muted);
  cursor: pointer;
}

/* 状态条 */
.status { min-height: 1.4em; font-weight: 600; font-size: .95rem; }
.status[data-kind="ok"] { color: var(--ok); }
.status[data-kind="error"] { color: var(--err); }
.status[data-kind="info"] { color: var(--info); }

/* 预览 */
.preview-wrap { padding: 12px; }
.preview-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; }
.preview-head h2 { margin: 0; font-size: 1rem; }
#preview {
  width: 100%; height: 70vh; min-height: 420px; border: 1px solid var(--line); border-radius: 12px; background: #f7f7f7;
}

.foot { margin-top: 18px; color: var(--muted); font-size: 0.8rem; text-align: center; }

/* 加载遮罩 */
.overlay {
  position: fixed; inset: 0; background: rgba(45, 52, 54, .55);
  display: flex; align-items: center; justify-content: center; z-index: 50;
}
.overlay.hidden, .hidden { display: none !important; }
.overlay-box {
  background: #fff; border-radius: 16px; padding: 24px 28px; text-align: center;
  max-width: 86vw; box-shadow: var(--shadow);
}
.overlay-box p { margin: 14px 0 0; font-weight: 600; }
.spinner {
  width: 42px; height: 42px; margin: 0 auto; border-radius: 50%;
  border: 5px solid #ffe0cc; border-top-color: var(--primary);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }