:root {
  --bg: #f5f7fa;
  --card-bg: #ffffff;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --success: #16a34a;
  --success-hover: #15803d;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --touch-target: 48px; /* 触屏最小可点区域 */
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
  /* 防止移动端横向滚动 */
  overflow-x: hidden;
}

.topbar { text-align: center; padding: 20px 12px 8px; }
.topbar h1 { margin: 0; font-size: clamp(18px, 5vw, 22px); }
.subtitle { margin: 4px 0 0; color: var(--muted); font-size: 13px; }

.panel {
  max-width: 640px;
  margin: 12px auto;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 16px;
}

.form-row { display: flex; flex-direction: column; margin-bottom: 16px; }
.form-row label { font-size: 14px; margin-bottom: 6px; font-weight: 500; }
input[type="text"], select {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  /* >=16px 防止 iOS 聚焦自动缩放 */
  font-size: 16px;
  background: #fff;
  width: 100%;
}

button {
  padding: 12px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font-size: 15px;
  cursor: pointer;
  transition: background 0.15s, transform 0.08s;
  /* 触屏可点区域保证 */
  min-height: var(--touch-target);
  -webkit-tap-highlight-color: transparent;
}
button:disabled { opacity: 0.5; cursor: not-allowed; }
button:active { transform: scale(0.97); } /* 触屏按压反馈 */
button.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
button.danger { background: var(--danger); color: #fff; border-color: var(--danger); }
button.success { background: var(--success); color: #fff; border-color: var(--success); }
button.link { border: none; background: transparent; color: var(--primary); padding: 4px 8px; min-height: auto; }

/* hover 仅对真正支持 hover 的设备（鼠标）生效，触屏不依赖 */
@media (hover: hover) {
  button.primary:hover:not(:disabled) { background: var(--primary-hover); }
  button.danger:hover:not(:disabled) { background: var(--danger-hover); }
  button.success:hover:not(:disabled) { background: var(--success-hover); }
}

.hint { color: var(--muted); font-size: 13px; min-height: 18px; margin: 8px 0 0; }

.meta-bar {
  display: flex; justify-content: space-between; align-items: center;
  color: var(--muted); font-size: 13px; margin-bottom: 12px;
}

.progress-bar {
  display: flex; justify-content: space-between;
  background: #eff6ff; border-radius: 8px; padding: 8px 12px;
  font-size: 13px; color: var(--primary); margin-bottom: 20px;
}

.card {
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 28px 16px;
  text-align: center;
  margin-bottom: 20px;
  min-height: 140px;
  display: flex; flex-direction: column; justify-content: center;
}
.template-id { color: var(--muted); font-size: 13px; letter-spacing: 1px; }
/* 模板文本随屏宽自适应：手机足够大便于朗读，桌面不过分 */
.template-text { font-size: clamp(22px, 7vw, 30px); font-weight: 600; margin-top: 12px; word-break: break-word; }

.controls { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }

.status { text-align: center; margin: 16px 0 0; min-height: 22px; font-size: 14px; }
.status.uploading { color: var(--primary); }
.status.success { color: var(--success); }
.status.error { color: var(--danger); }

/* ===== 手机（≤640px）：按钮纵向铺满，单手易操作 ===== */
@media (max-width: 640px) {
  .panel { margin: 8px; border-radius: 10px; padding: 18px 14px; }
  .controls { flex-direction: column; }
  .controls > button { width: 100%; }
  .card { padding: 24px 12px; min-height: 160px; }
  .meta-bar { flex-wrap: wrap; gap: 8px; }
}

/* ===== 平板（641–1024px） ===== */
@media (min-width: 641px) and (max-width: 1024px) {
  .panel { max-width: 720px; padding: 28px 24px; }
}

/* ===== PC（≥1025px）：限宽居中 ===== */
@media (min-width: 1025px) {
  .panel { max-width: 680px; padding: 32px; }
}