/* scanlike 独立网页：钢蓝扁平风格，无框架无构建；支持随 paperless 同源挂载与独立域名两种部署 */
:root {
  --c-bg: #f1f3f6;
  --c-surface: #ffffff;
  --c-surface-muted: #f7f9fb;
  --c-border: #dfe4ea;
  --c-border-strong: #c8d0da;
  --c-text: #1c2430;
  --c-text-2: #5a6675;
  --c-text-3: #8a95a3;
  --c-accent: #2f5aa8;
  --c-accent-strong: #27508f;
  --c-accent-weak: #eaf0fa;
  --c-danger: #b42318;
  --c-danger-weak: #fdecea;
  --c-success: #2f7d4f;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font: 14px/1.55 var(--font);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ---------- 顶栏 ---------- */
.appbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 20px;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
}
.appbar__brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.appbar__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--c-accent);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
  flex: none;
}
.appbar__titles { min-width: 0; }
.appbar__title { font-size: 16px; font-weight: 600; line-height: 1.3; }
.appbar__sub { font-size: 12.5px; color: var(--c-text-3); }
.appbar__actions { display: flex; align-items: center; gap: 12px; }

.svc { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--c-text-2); white-space: nowrap; }
.svc__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c-text-3); }
.svc--ok .svc__dot { background: var(--c-success); }
.svc--err .svc__dot { background: var(--c-danger); }

/* ---------- 布局 ---------- */
.layout {
  flex: 1;
  width: 100%;
  max-width: none;
  margin: 0 auto;
  padding: 12px 16px;
  display: grid;
  grid-template-columns: minmax(280px, 330px) minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

/* 全宽预览：隐藏左侧设置，预览占满 */
.layout--wide { grid-template-columns: minmax(0, 1fr); }
.layout--wide .panel--controls { display: none; }

.panel {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.panel--controls { display: flex; flex-direction: column; }
.step { padding: 14px 16px; border-bottom: 1px solid var(--c-border); display: flex; flex-direction: column; gap: 10px; }
.step:last-child { border-bottom: 0; }
.step__head { display: flex; align-items: center; gap: 8px; font-size: 13.5px; font-weight: 600; }
.step__no {
  display: inline-flex; align-items: center; justify-content: center;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--c-accent-weak); color: var(--c-accent);
  font-size: 11.5px; font-weight: 700;
}

/* ---------- 文件选择 ---------- */
.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 22px 12px;
  border: 1px dashed var(--c-border-strong);
  border-radius: var(--radius-sm);
  background: var(--c-surface-muted);
  text-align: center;
  cursor: pointer;
  transition: border-color .12s ease, background-color .12s ease;
}
.dropzone:hover, .dropzone:focus-visible, .dropzone--over { border-color: var(--c-accent); background: var(--c-accent-weak); outline: none; }
.dropzone__icon { width: 26px; height: 26px; color: var(--c-accent); }
.dropzone__title { font-size: 13.5px; }
.dropzone__hint { font-size: 12px; color: var(--c-text-3); }
.dropzone--hidden { display: none; }

.filecard {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-surface-muted);
}
.filecard[hidden] { display: none; }
.filecard__icon {
  flex: none;
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 4px;
  background: #fdecea; color: var(--c-danger);
  font-size: 11px; font-weight: 700; letter-spacing: .02em;
}
.filecard__meta { min-width: 0; flex: 1; }
.filecard__name { font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.filecard__sub { font-size: 12px; color: var(--c-text-3); font-variant-numeric: tabular-nums; }

/* ---------- 预设 ---------- */
.presets { display: grid; grid-template-columns: repeat(auto-fill, minmax(104px, 1fr)); gap: 6px; }
.preset {
  display: flex; flex-direction: column; align-items: flex-start; gap: 1px;
  padding: 8px 10px;
  border: 1px solid var(--c-border-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--c-text);
  font: inherit; font-size: 13px;
  text-align: left;
  cursor: pointer;
  transition: border-color .12s ease, background-color .12s ease;
}
.preset em { font-style: normal; font-size: 11.5px; color: var(--c-text-3); }
.preset:hover { border-color: var(--c-accent); background: var(--c-accent-weak); }
.preset.active { border-color: var(--c-accent); background: var(--c-accent-weak); box-shadow: inset 0 0 0 1px var(--c-accent); }
.preset.active em { color: var(--c-accent); }

.row { display: flex; align-items: center; gap: 10px; }
.row--between { justify-content: space-between; flex-wrap: wrap; }

/* 开关 */
.switch { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; }
.switch input { position: absolute; opacity: 0; width: 0; height: 0; }
.switch__track {
  position: relative; width: 34px; height: 20px; border-radius: 999px;
  background: var(--c-border-strong); transition: background-color .15s ease; flex: none;
}
.switch__track::after {
  content: ''; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px;
  border-radius: 50%; background: #fff; transition: transform .15s ease;
  box-shadow: 0 1px 2px rgba(16, 24, 40, .25);
}
.switch input:checked + .switch__track { background: var(--c-accent); }
.switch input:checked + .switch__track::after { transform: translateX(14px); }
.switch input:focus-visible + .switch__track { outline: 2px solid var(--c-accent); outline-offset: 2px; }
.switch__label { font-size: 13px; color: var(--c-text-2); }

/* 分段控件 */
.seg { display: inline-flex; border: 1px solid var(--c-border-strong); border-radius: var(--radius-sm); overflow: hidden; }
.seg button {
  border: 0; background: #fff; color: var(--c-text-2);
  font: inherit; font-size: 12.5px; padding: 4px 10px; cursor: pointer;
}
.seg button + button { border-left: 1px solid var(--c-border); }
.seg button:hover { background: var(--c-accent-weak); color: var(--c-accent); }
.seg button.active { background: var(--c-accent); color: #fff; }

.hint { margin: 0; font-size: 12px; color: var(--c-text-3); }

/* 高级参数 */
.advanced { border-top: 1px solid var(--c-border); padding-top: 8px; }
.advanced summary { cursor: pointer; font-size: 12.5px; color: var(--c-accent); user-select: none; }
.advanced[open] summary { margin-bottom: 8px; }
.sliders { display: flex; flex-direction: column; gap: 8px; margin-bottom: 10px; }
.slider { display: grid; grid-template-columns: 118px 1fr 66px; align-items: center; gap: 8px; }
.slider > label { font-size: 12.5px; color: var(--c-text-2); display: flex; align-items: center; gap: 4px; }
.slider output { color: var(--c-accent); font-variant-numeric: tabular-nums; }
.slider .unit { color: var(--c-text-3); font-size: 11.5px; }
input[type="range"] { width: 100%; accent-color: var(--c-accent); }
.num { width: 66px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 8px; }
.field { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--c-text-2); }
.field label { min-width: 60px; }
.field--check label { min-width: 0; display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }

select, input[type="number"] {
  height: 28px; padding: 0 6px;
  border: 1px solid var(--c-border-strong); border-radius: 3px;
  background: #fff; color: var(--c-text); font: inherit; font-size: 13px;
}
select { width: 100%; }
select:focus, input:focus { outline: 2px solid var(--c-accent); outline-offset: 0; border-color: var(--c-accent); }
input[type="checkbox"] { accent-color: var(--c-accent); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 30px; padding: 0 12px;
  border: 1px solid var(--c-border-strong); border-radius: var(--radius-sm);
  background: #fff; color: var(--c-text);
  font: inherit; font-size: 13px; text-decoration: none; cursor: pointer;
  transition: border-color .12s ease, background-color .12s ease, color .12s ease;
  white-space: nowrap;
}
.btn:hover:not(:disabled) { border-color: var(--c-accent); color: var(--c-accent); background: var(--c-accent-weak); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn--primary { background: var(--c-accent); border-color: var(--c-accent); color: #fff; }
.btn--primary:hover:not(:disabled) { background: var(--c-accent-strong); border-color: var(--c-accent-strong); color: #fff; }
.btn--ghost { border-color: transparent; background: transparent; color: var(--c-text-2); }
.btn--ghost:hover:not(:disabled) { background: var(--c-accent-weak); color: var(--c-accent); border-color: transparent; }
.btn--lg { height: 34px; padding: 0 16px; font-weight: 600; }
.btn--busy { pointer-events: none; opacity: .85; }

.icon-btn {
  flex: none;
  width: 26px; height: 26px;
  border: 0; border-radius: 4px; background: transparent;
  color: var(--c-text-3); font-size: 18px; line-height: 1; cursor: pointer;
}
.icon-btn:hover { background: var(--c-danger-weak); color: var(--c-danger); }

.actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.status { min-height: 18px; font-size: 12.5px; color: var(--c-text-2); }
.status--error { color: var(--c-danger); }
.status--ok { color: var(--c-success); }

/* ---------- 预览区 ---------- */
.panel--preview {
  display: flex;
  flex-direction: column;
  height: calc(100dvh - 124px);
  min-height: 520px;
  position: sticky;
  top: 68px;
}
.preview__bar {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; border-bottom: 1px solid var(--c-border);
  flex-wrap: wrap;
}
.preview__bar .chips { flex: 1 1 220px; }
.preview__bar #toggle-controls { margin-left: auto; }
.tabs { display: inline-flex; gap: 2px; background: var(--c-surface-muted); border: 1px solid var(--c-border); border-radius: var(--radius-sm); padding: 2px; }
.tabs button {
  border: 0; border-radius: 3px; background: transparent; color: var(--c-text-2);
  font: inherit; font-size: 12.5px; padding: 3px 12px; cursor: pointer;
}
.tabs button:hover { color: var(--c-accent); }
.tabs button.active { background: #fff; color: var(--c-accent); box-shadow: var(--shadow); font-weight: 600; }

.chips { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px; border-radius: 999px;
  background: var(--c-accent-weak); color: var(--c-accent);
  font-size: 11.5px; font-variant-numeric: tabular-nums;
}
.chip--muted { background: var(--c-surface-muted); color: var(--c-text-2); }

.preview { flex: 1; min-height: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--c-border); border-radius: 0 0 var(--radius) var(--radius); overflow: hidden; }
.preview__pane { position: relative; background: var(--c-surface-muted); display: flex; flex-direction: column; min-height: 0; }
.preview__pane[hidden] { display: none; }
.preview__label {
  padding: 6px 10px; font-size: 12px; color: var(--c-text-2);
  background: var(--c-surface); border-bottom: 1px solid var(--c-border);
}
.preview__pane iframe { flex: 1; width: 100%; height: 100%; min-height: 0; border: 0; }
.preview__empty {
  position: absolute; inset: 32px 0 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--c-text-3); font-size: 13px;
  background: var(--c-surface-muted);
  text-align: center; padding: 12px;
}
.preview__empty[hidden] { display: none; }

/* 视图模式 */
.preview[data-view="original"] { grid-template-columns: 1fr; }
.preview[data-view="original"] #pane-result { display: none; }
.preview[data-view="result"] { grid-template-columns: 1fr; }
.preview[data-view="result"] #pane-original { display: none; }

/* 处理中：结果区骨架 */
.preview__pane--busy::after {
  content: '';
  position: absolute; inset: 32px 0 0;
  background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(234,240,250,.9) 50%, rgba(255,255,255,0) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.2s linear infinite;
}
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }
@media (prefers-reduced-motion: reduce) {
  .preview__pane--busy::after { animation: none; background: rgba(234,240,250,.5); }
}

/* ---------- 页脚 ---------- */
.footer {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 8px 16px 14px;
  width: 100%;
  font-size: 12px; color: var(--c-text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; padding: 10px 12px; }
  .panel--preview { height: auto; min-height: 0; position: static; }
  .preview { grid-template-columns: 1fr; }
  .preview[data-view="both"] .preview__pane { min-height: 380px; }
  .preview[data-view="both"] .preview__pane + .preview__pane { border-top: 1px solid var(--c-border); }
  .preview[data-view="both"] .preview__pane iframe { min-height: 340px; }
}
@media (max-width: 560px) {
  .appbar { flex-wrap: wrap; }
  .slider { grid-template-columns: 96px 1fr 62px; }
  .preview__bar { align-items: flex-start; flex-direction: column; }
}