/* =========================================================================
   BiRefNet WebUI · 深色主题
   设计约束：字号层级 4 档 · 字体 2 种（系统 UI + 等宽）· 色彩角色 4 个
             （accent / ok / warn / danger）· 单焦点（开始抠图）
   ========================================================================= */
:root {
  --bg: #0d0f13;
  --surface: #141821;
  --surface-2: #1a1f2a;
  --surface-3: #202634;
  --border: #252b38;
  --border-soft: #1e2430;
  --text: #e9edf5;
  --text-dim: #95a0b3;
  --text-faint: #6b7688;

  --accent: #4f8cff;
  --accent-hover: #6ba0ff;
  --accent-soft: rgba(79, 140, 255, 0.14);
  --ok: #35c98a;
  --warn: #f0b429;
  --danger: #f2555a;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Consolas, "Courier New", monospace;

  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body { display: flex; flex-direction: column; overflow: hidden; }

h1, h2, h3 { margin: 0; font-weight: 600; }
button, input, select { font: inherit; color: inherit; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #2b3242; border-radius: 8px; border: 2px solid var(--bg); }
::-webkit-scrollbar-track { background: transparent; }

/* ------------------------------- 顶栏 ------------------------------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 22px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex: 0 0 auto;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand .logo { display: grid; place-items: center; }
.brand h1 { font-size: 28px; letter-spacing: -0.5px; line-height: 1.1; }
.brand h1 em { font-style: normal; font-weight: 300; color: var(--text-dim); }

.meta { display: flex; gap: 26px; margin: 0; margin-left: auto; }
.meta > div { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.meta dt { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-faint); }
.meta dd { margin: 0; font-size: 13px; color: var(--text); font-family: var(--mono); }
.meta dd.path { max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text-dim); }
.topbar-actions { display: flex; gap: 8px; }

/* ------------------------------- 主体 ------------------------------- */
.layout { flex: 1 1 auto; display: grid; grid-template-columns: 348px 1fr; min-height: 0; }

.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.block {
  background: var(--surface-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.block-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.block-head h2 { font-size: 13px; letter-spacing: 0.02em; color: var(--text); }
.hint { font-size: 11px; color: var(--text-faint); font-family: var(--mono); }

/* 表单 */
.field { display: flex; flex-direction: column; gap: 5px; min-width: 0; flex: 1; }
.field > span { font-size: 12px; color: var(--text-dim); }
.field-row { display: flex; gap: 10px; }
select, input[type="number"], input[type="text"] {
  width: 100%;
  padding: 7px 9px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 12.5px;
  transition: border-color .15s, box-shadow .15s;
}
select:focus, input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
input[type="color"] {
  width: 100%; height: 34px; padding: 3px; background: var(--bg);
  border: 1px solid var(--border); border-radius: var(--radius-sm); cursor: pointer;
}
.check { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--text-dim); cursor: pointer; }
.check input { accent-color: var(--accent); width: 15px; height: 15px; }
.hidden { display: none !important; }

.swatches { display: flex; align-items: center; gap: 6px; }
.swatches button {
  width: 30px; height: 34px; border-radius: var(--radius-sm); cursor: pointer;
  background: var(--c); border: 1px solid var(--border);
}
.swatches button:hover { border-color: var(--accent); }

/* 上传区 */
.dropzone {
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(79, 140, 255, 0.04), transparent);
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.dropzone.compact { padding: 18px 12px; }
.dropzone:hover, .dropzone:focus-visible, .dropzone.over {
  border-color: var(--accent); background: var(--accent-soft); outline: none;
}
.dropzone p { margin: 0; font-size: 13px; }
.dropzone .sub { margin-top: 4px; font-size: 11.5px; color: var(--text-faint); }
kbd {
  font-family: var(--mono); font-size: 11px; padding: 1px 5px;
  border: 1px solid var(--border); border-radius: 4px; background: var(--bg);
}

/* 待处理槽（单张） */
.thumbs { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.thumbs:empty { display: none; }
.pending-item {
  display: grid; grid-template-columns: 76px 1fr auto; align-items: center; gap: 10px;
  padding: 8px; background: var(--bg);
  border: 1px solid var(--accent); border-radius: var(--radius-sm);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.thumb-wrap {
  width: 76px; height: 76px; border-radius: 8px; overflow: hidden;
  background-color: #0a0c10;
  background-image:
    linear-gradient(45deg, #171b23 25%, transparent 25%),
    linear-gradient(-45deg, #171b23 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #171b23 75%),
    linear-gradient(-45deg, transparent 75%, #171b23 75%);
  background-size: 14px 14px;
  background-position: 0 0, 0 7px, 7px -7px, -7px 0;
}
.thumb-wrap img { width: 100%; height: 100%; object-fit: contain; display: block; }
.pending-meta { min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.pending-meta .tname { font-size: 12.5px; color: var(--text); word-break: break-all; }
.pending-meta .tsize { font-size: 11px; color: var(--text-faint); font-family: var(--mono); }
.thumbs .tremove {
  border: 0; background: transparent; color: var(--text-faint); cursor: pointer;
  font-size: 17px; line-height: 1; padding: 3px 8px; border-radius: 6px;
}
.thumbs .tremove:hover { color: var(--danger); background: rgba(242, 85, 90, .12); }
.pending-note { margin: 0; font-size: 11.5px; line-height: 1.5; color: var(--accent); }
.pending-note:empty { display: none; }

/* 按钮 */
.btn {
  border: 1px solid var(--border);
  background: var(--surface-3);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 9px 14px;
  cursor: pointer;
  transition: background .15s, border-color .15s, transform .05s;
  white-space: nowrap;
}
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .42; cursor: not-allowed; }
.btn.sm { padding: 6px 11px; font-size: 12.5px; }
.btn.ghost { background: transparent; }
.btn.primary {
  background: var(--accent); border-color: var(--accent); color: #fff;
  font-weight: 600; font-size: 15px; padding: 12px 16px;
}
.btn.primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn.link { background: none; border: 0; color: var(--accent); padding: 0; font-size: 12.5px; }

.actions { gap: 12px; }
.progress { display: flex; flex-direction: column; gap: 6px; }
.bar { height: 6px; border-radius: 99px; background: var(--bg); overflow: hidden; }
.bar > i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .25s ease; }
.progress-meta { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: var(--text-dim); }
.error-text { margin: 0; font-size: 12.5px; color: var(--danger); word-break: break-all; }

/* 批量处理说明 */
.batch-note { margin: 0; font-size: 11px; line-height: 1.65; color: var(--text-faint); }
.field-tip { margin: -2px 0 0; font-size: 11px; line-height: 1.6; color: var(--text-faint); }
.batch-note strong { color: var(--text-dim); font-weight: 500; }
.batch-note code {
  font-family: var(--mono); font-size: 10.5px; color: var(--text-dim);
  background: var(--bg); border: 1px solid var(--border-soft); border-radius: 4px; padding: 0 4px;
}

/* ------------------------------- 结果区 ------------------------------- */
.stage { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.stage-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px; border-bottom: 1px solid var(--border); gap: 16px;
}
.stage-head h2 { font-size: 15px; }
.stage-head .count { font-family: var(--mono); color: var(--text-dim); font-weight: 400; }
.stage-tools { display: flex; align-items: center; gap: 10px; }
.stage-tip {
  flex: 0 0 auto; margin: 0; padding: 7px 22px; font-size: 11.5px; color: var(--text-faint);
  border-bottom: 1px solid var(--border-soft); background: rgba(79, 140, 255, .04);
}

.segmented { display: flex; background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 2px; }.segmented button {
  border: 0; background: transparent; color: var(--text-dim);
  padding: 5px 12px; border-radius: 6px; cursor: pointer; font-size: 12.5px;
}
.segmented button.active { background: var(--accent-soft); color: var(--accent); }

/* 批量任务报告（结果区顶部，仅在跑过 / 存在批量任务时出现） */
.batch-report {
  flex: 0 0 auto; margin: 14px 22px 0; padding: 12px 14px;
  background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--radius);
  display: flex; flex-direction: column; gap: 8px; max-height: 40vh;
}
.batch-report[hidden] { display: none; }
.batch-report-head { display: flex; align-items: center; gap: 10px; }
.batch-report-head h3 { font-size: 13px; display: flex; align-items: center; gap: 8px; }
.batch-report-path {
  flex: 1; min-width: 0; font-family: var(--mono); font-size: 11px; color: var(--text-faint);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.batch-report-sum { margin: 0; font-family: var(--mono); font-size: 11.5px; color: var(--text-dim); }
.batch-rows {
  list-style: none; margin: 0; padding: 0; overflow-y: auto;
  display: flex; flex-direction: column; gap: 4px;
}
.batch-rows:empty { display: none; }
.batch-row {
  display: grid; grid-template-columns: 34px minmax(0, 1fr) minmax(0, 1.4fr) auto auto;
  align-items: center; gap: 10px; padding: 5px 9px;
  background: var(--surface-2); border: 1px solid var(--border-soft); border-radius: var(--radius-sm);
  font-family: var(--mono); font-size: 11.5px; color: var(--text-dim);
}
.batch-row .bi { text-align: right; color: var(--text-faint); }
.batch-row .bs,
.batch-row .bo { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.batch-row .bo { color: var(--text); }
.batch-row .bo::before { content: "→ "; color: var(--text-faint); }
.batch-row .bo:empty::before { content: ""; }
.batch-row .bt { color: var(--text-faint); font-size: 11px; }
.batch-row.running { border-color: rgba(79, 140, 255, .4); background: var(--accent-soft); }
.batch-row.failed { border-color: rgba(242, 85, 90, .35); }
.batch-row.canceled { opacity: .55; }

.grid {
  flex: 1 1 auto; overflow-y: auto; padding: 18px 22px 28px;
  display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  align-content: start;
}

.card {
  background: var(--surface); border: 1px solid var(--border-soft);
  border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column;
  transition: border-color .15s, box-shadow .15s;
}
.card-head { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-bottom: 1px solid var(--border-soft); cursor: pointer; }
.card-head .name {
  flex: 1; min-width: 0; text-align: left; cursor: pointer;
  border: 0; background: transparent; color: var(--text);
  padding: 3px 6px; margin-left: -6px; border-radius: 6px;
  font-size: 12.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  transition: color .15s, background .15s;
}
.card-head .name:hover {
  color: var(--accent); background: var(--accent-soft);
  text-decoration: underline; text-underline-offset: 3px;
}
.card-head .name:focus-visible { outline: none; box-shadow: 0 0 0 2px var(--accent-soft); }
.card-del {
  flex: 0 0 auto; border: 0; background: transparent; color: var(--text-faint);
  cursor: pointer; font-size: 17px; line-height: 1; padding: 2px 8px; border-radius: 6px;
  transition: color .15s, background .15s;
}
.card-del:hover { color: var(--danger); background: rgba(242, 85, 90, .12); }

/* 处理这条记录时用的参数：始终可见（便于对照历史），过长省略，完整 JSON 在 title 里 */
.card-params {
  margin: 0; padding: 6px 12px;
  font-family: var(--mono); font-size: 11px; color: var(--text-faint);
  background: var(--surface-2); border-bottom: 1px solid var(--border-soft);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.card-params::before { content: "参数 "; color: var(--text-dim); }
.card-params:empty { display: none; }

/* 选中态：主题色一圈描边 + 头部同色底 */
.card.selected { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.card.selected .card-head { background: var(--accent-soft); border-bottom-color: rgba(79, 140, 255, .35); }
.badge {
  font-family: var(--mono); font-size: 11px; padding: 2px 7px; border-radius: 99px;
  background: var(--surface-3); color: var(--text-dim); border: 1px solid var(--border);
}
.badge.ok { color: var(--ok); border-color: rgba(53, 201, 138, .35); background: rgba(53, 201, 138, .1); }
.badge.warn { color: var(--warn); border-color: rgba(240, 180, 41, .35); background: rgba(240, 180, 41, .1); }
.badge.err { color: var(--danger); border-color: rgba(242, 85, 90, .35); background: rgba(242, 85, 90, .1); }

/* 对比视图 */
.compare {
  position: relative; width: 100%; aspect-ratio: 4 / 3; overflow: hidden;
  background-color: #0a0c10;
  background-image:
    linear-gradient(45deg, #171b23 25%, transparent 25%),
    linear-gradient(-45deg, #171b23 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #171b23 75%),
    linear-gradient(-45deg, transparent 75%, #171b23 75%);
  background-size: 18px 18px;
  background-position: 0 0, 0 9px, 9px -9px, -9px 0;
}
.compare img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: contain; user-select: none; -webkit-user-drag: none; pointer-events: none;
}
.compare .after { clip-path: inset(0 calc(100% - var(--p, 50%)) 0 0); }
.compare .divider {
  position: absolute; top: 0; bottom: 0; left: var(--p, 50%); width: 2px;
  background: var(--accent); box-shadow: 0 0 12px rgba(79, 140, 255, .55); pointer-events: none;
}
.compare .divider::after {
  content: ""; position: absolute; top: 50%; left: 50%; width: 26px; height: 26px;
  transform: translate(-50%, -50%); border-radius: 50%;
  background: var(--accent); border: 3px solid var(--surface);
}
.compare input[type="range"] {
  position: absolute; inset: 0; width: 100%; height: 100%; margin: 0;
  opacity: 0; cursor: ew-resize; -webkit-appearance: none; appearance: none;
}
.compare .tag {
  position: absolute; bottom: 8px; font-family: var(--mono); font-size: 11px;
  padding: 2px 7px; border-radius: 6px; background: rgba(8, 10, 14, .72); color: var(--text);
  border: 1px solid var(--border); pointer-events: none;
}
.compare .tag.left { left: 8px; }
.compare .tag.right { right: 8px; color: var(--accent); }

.card-body { padding: 10px 12px; display: flex; flex-direction: column; gap: 8px; }
.card-stats { display: flex; flex-wrap: wrap; gap: 12px; font-family: var(--mono); font-size: 11.5px; color: var(--text-faint); }
.card-stats b { color: var(--text-dim); font-weight: 500; }
.card-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.card-note { margin: 0; font-size: 11.5px; color: var(--warn); }
.card-error { font-size: 12px; color: var(--danger); word-break: break-all; }

/* 卡片状态 */
.card.running .card-body, .card.pending .card-body { display: none; }
.card .status {
  padding: 26px 12px; display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: var(--text-dim); font-size: 12.5px;
}
.spinner {
  width: 22px; height: 22px; border-radius: 50%;
  border: 2px solid var(--border); border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.card.done .status, .card.failed .status, .card.canceled .status { display: none; }

.empty-state {
  flex: 1 1 auto; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; text-align: center; padding: 40px; color: var(--text-dim);
}
.empty-state h3 { font-size: 28px; font-weight: 600; color: var(--text); letter-spacing: -0.4px; }
.empty-state p { margin: 0; max-width: 460px; font-size: 13px; line-height: 1.7; }
.empty-state.hidden { display: none; }

@media (max-width: 1100px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--border); }
  .meta { display: none; }
}