/* RUN OBJECT Preview — 免费路线预览工具
 * 复用 create.css 设计语言：纸白底、墨色文字、线框按钮
 */
:root {
  --bg: #f7f6f3;
  --ink: #111;
  --line: #d8d6d0;
  --muted: #6b6b6b;
  --paper: #fff;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
.container { max-width: 720px; margin: 0 auto; padding: 0 24px; }
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0 14px;
  border-bottom: 1px solid var(--line);
}
header .logo { height: 28px; width: auto; display: block; }
header .nav-link {
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
header .nav-link:hover { color: var(--ink); border-bottom-color: var(--ink); }
.section-title {
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--muted);
}
.section-title.active { color: var(--ink); }
.flow-header { margin-bottom: 20px; padding-top: 32px; }
.intro {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 480px;
}
/* Upload zone */
.upload-zone {
  border: 1px dashed var(--line);
  padding: 44px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s;
  background: var(--paper);
}
.upload-zone:hover { border-color: var(--ink); }
.upload-zone.dragover { border-color: var(--ink); background: #efeee9; }
.upload-zone .hint { font-size: 13px; color: var(--ink); letter-spacing: 1px; }
.upload-zone .formats { font-size: 11px; color: var(--muted); margin-top: 8px; }
.upload-zone .privacy {
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.5px;
  margin-top: 16px;
}
.upload-zone input { display: none; }
/* Status / spinner */
.status { text-align: center; padding: 40px 0; }
.status .spinner {
  width: 22px;
  height: 22px;
  border: 2px solid var(--line);
  border-top-color: var(--ink);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.status .msg { font-size: 13px; color: var(--muted); letter-spacing: 1px; }
/* Error */
.error-box {
  border: 1px solid var(--ink);
  background: var(--paper);
  padding: 16px 20px;
  margin-bottom: 20px;
}
.error-box .msg { font-size: 12px; color: var(--ink); letter-spacing: 0.5px; }
/* Preview stage */
.preview-stage {
  margin-top: 28px;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 12px;
}
.preview-stage canvas {
  display: block;
  width: 100%;
  height: auto;
}
/* Title field */
.title-field { margin-top: 20px; }
.title-field label {
  display: block;
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--muted);
  margin-bottom: 4px;
}
.title-field input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: var(--paper);
  font-size: 13px;
  font-family: inherit;
  letter-spacing: 1px;
  color: var(--ink);
  text-transform: uppercase;
}
.title-field input:focus { outline: none; border-color: var(--ink); }
.field-hint { font-size: 10px; color: var(--muted); margin-top: 4px; }
/* Buttons — 白底线框 */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-size: 12px;
  letter-spacing: 2px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  font-family: inherit;
  text-align: center;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }
.btn:disabled:hover { background: transparent; color: var(--ink); }
.btn-sm { padding: 10px 18px; font-size: 10px; }
.step-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}
.step-actions .btn { flex: 1; min-width: 140px; }
.share-note {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.5px;
  margin-top: 12px;
}
/* Footer */
footer {
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding: 20px 0 32px;
}
.copyright {
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--muted);
}
@media (max-width: 560px) {
  .step-actions { flex-direction: column; }
  .step-actions .btn { width: 100%; }
}