/* Vector Studio — 极简双栏：左画布 / 右操作台 */
:root{
  --bg:#0e1113;
  --bg-2:#181b1c;
  --bg-3:#202324;
  --line:#3d4141;
  --line-soft:#292e2e;
  --fg:#e8edf5;
  --fg-dim:#8b97ad;
  --fg-mute:#5d6779;
  --accent:#e7c669;
  --accent-2:#6ee7c8;
  --warn:#ffb454;
  --err:#ff6b6b;
  --radius:8px;
  --canvas-bg:#242727;
}

*{box-sizing:border-box}
[hidden]{display:none !important}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--fg);
  font:14px/1.5 -apple-system,"Segoe UI","Microsoft YaHei",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;overflow:hidden;
}
.app{display:flex;flex-direction:column;height:100vh}

.badges{display:flex;gap:8px}
.badge{
  font-size:12px;padding:4px 10px;border-radius:999px;
  background:var(--bg-3);border:1px solid var(--line);color:var(--fg-dim);
}
.badge.ok{color:var(--accent-2);border-color:rgba(110,231,200,.35)}
.badge.bad{color:var(--err);border-color:rgba(255,107,107,.35)}
.badge.warn{color:var(--warn);border-color:rgba(255,180,84,.4);background:rgba(255,180,84,.08)}
.badge-dim{color:var(--fg-mute)}

/* ---------- 主体 ---------- */
.stage{display:grid;grid-template-columns:1fr 336px;flex:1;min-height:0}

/* ---------- 左：画布（还原原软件的中性灰底 + 棋盘格透明底） ---------- */
.canvas-wrap{display:flex;flex-direction:column;min-width:0;padding:14px}
.canvas{
  position:relative;flex:1;min-height:0;border-radius:var(--radius);
  background:var(--canvas-bg);border:1px solid var(--line-soft);
  overflow:hidden;display:flex;align-items:center;justify-content:center;
  transition:border-color .2s,box-shadow .2s;
}
.canvas.dragover{border-color:var(--accent);box-shadow:inset 0 0 0 2px rgba(76,141,255,.25)}
.checker{
  position:absolute;inset:0;opacity:.5;
  background-image:
    linear-gradient(45deg,#2a2f39 25%,transparent 25%,transparent 75%,#2a2f39 75%),
    linear-gradient(45deg,#2a2f39 25%,transparent 25%,transparent 75%,#2a2f39 75%);
  background-size:18px 18px;background-position:0 0,9px 9px;
}
.preview-content{position:absolute;left:0;top:0;transform-origin:0 0;z-index:1;pointer-events:none}
#previewMode{height:32px;max-width:110px;border:1px solid var(--line);border-radius:5px;background:var(--bg-3);color:var(--fg);font:inherit;font-size:12px}
#previewMode:disabled{opacity:.4}
.compare-controls{position:absolute;inset:0;z-index:4;pointer-events:none}
.compare-label{position:absolute;top:12px;padding:4px 9px;border-radius:5px;background:rgba(15,17,21,.8);color:#fff;font-size:12px}
.source-label{left:12px}.vector-label{right:12px}
.compare-divider{position:absolute;top:0;bottom:0;left:50%;width:2px;background:#b6e5ff;box-shadow:0 0 3px #18232f;transform:translateX(-1px)}
.compare-slider{position:absolute;top:50%;left:-18px;width:calc(100% + 36px);height:40px;margin:-20px 0 0;padding:0;background:transparent;appearance:none;pointer-events:none;touch-action:none}
.compare-slider::-webkit-slider-runnable-track{height:2px;background:transparent}
.compare-slider::-webkit-slider-thumb{appearance:none;width:36px;height:36px;margin-top:-17px;border:2px solid #bddcf5;border-radius:50%;background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='32' height='32' viewBox='0 0 32 32'%3E%3Cpath d='m12 11-5 5 5 5m8-10 5 5-5 5' fill='none' stroke='%23374660' stroke-width='2'/%3E%3C/svg%3E") center no-repeat;box-shadow:0 2px 8px #0006;pointer-events:auto;cursor:ew-resize}
.compare-slider:focus-visible{outline:none}.compare-slider:focus-visible::-webkit-slider-thumb{outline:3px solid var(--accent);outline-offset:3px}
#preview{display:block;width:100%;height:100%;object-fit:contain;user-select:none}
.canvas.has-image{cursor:grab;touch-action:none;user-select:none}
.canvas.is-panning{cursor:grabbing}
.canvas:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.view-toolbar{display:flex;align-items:center;justify-content:flex-end;flex-wrap:wrap;gap:4px;padding:0 0 8px;flex:none}
.path-toggle{display:flex;align-items:center;gap:5px;margin-right:auto;font-size:12px;cursor:pointer;color:var(--fg-dim)}
.path-toggle input{accent-color:#00dce5}
.path-toggle:has(input:disabled){opacity:.35;cursor:default}
.path-toggle:has(input:checked){color:#00dce5}
.path-layer{position:absolute;inset:0;z-index:3;pointer-events:none}
.path-layer svg{display:block;width:100%;height:100%;overflow:visible}
.path-layer path{fill:none;stroke:#00dce5}
.path-outline{stroke-width:calc(1.25px * var(--preview-inverse-scale,1));stroke-linejoin:round}
.path-nodes{stroke-width:calc(5px * var(--preview-inverse-scale,1));stroke-linecap:square}
.view-tool{width:34px;height:32px;display:grid;place-items:center;border:1px solid var(--line);border-radius:5px;background:var(--bg-3);cursor:pointer;color:var(--fg)}
.view-tool svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.view-tool:hover:not(:disabled){border-color:var(--accent)}
.view-tool:disabled,.zoom-value:has(input:disabled){opacity:.35;cursor:default}
.view-tool:focus-visible,.zoom-value:focus-within{outline:2px solid var(--accent);outline-offset:2px}
.view-tool[aria-pressed="true"]{border-color:var(--accent);background:#24354b}
.view-divider{height:18px;border-left:1px solid var(--line);margin:0 4px}
.zoom-value{display:flex;align-items:center;justify-content:center;width:86px;height:32px;gap:2px;border:1px solid var(--line);border-radius:5px;background:var(--bg-3);color:var(--fg-dim);font-size:12px}
.zoom-value input{width:58px;min-width:0;padding:0;border:0;outline:0;background:transparent;color:var(--fg);font:inherit;text-align:right;appearance:textfield}
.zoom-value input::-webkit-inner-spin-button,.zoom-value input::-webkit-outer-spin-button{appearance:none;margin:0}

/* 追踪结果叠在同一画布上，可一键切换 */
.trace-layer{
  position:absolute;inset:0;z-index:2;
}
.trace-layer svg{
  display:block;width:100%;height:100%;
}

.mini{
  padding:4px 9px;margin-right:8px;border-radius:6px;cursor:pointer;
  background:#232b39;border:1px solid var(--line);color:var(--fg-dim);
  font:500 11.5px/1 inherit;transition:all .15s;
}
.mini:hover{color:var(--fg);border-color:var(--accent)}

.stats{font-size:11.5px;color:var(--fg-dim);line-height:1.6}
.palette{display:flex;gap:5px;margin-top:7px;flex-wrap:wrap}
.palette i{
  width:20px;height:20px;border-radius:5px;border:1px solid rgba(255,255,255,.14);
  display:inline-block;
}
.empty{position:relative;text-align:center;color:var(--fg-mute);z-index:1}
.empty-mark svg{
  width:52px;height:52px;fill:none;stroke:var(--fg-mute);
  stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;opacity:.55;
}
.empty-title{margin:10px 0 4px;color:var(--fg-dim);font-size:14px}
.empty-hint{margin:0;font-size:12px;letter-spacing:.4px}

/* ---------- 中部：转换动效 ---------- */
.overlay{
  position:absolute;inset:0;z-index:5;display:flex;align-items:center;justify-content:center;padding:14px;pointer-events:none;
  background:transparent;
  animation:fade .22s ease both;
}
@keyframes fade{from{opacity:0}to{opacity:1}}
.trace{display:none}
.trace path{fill:none;stroke-linecap:round;stroke-linejoin:round}
.p-raw{
  stroke:#4a5568;stroke-width:2;stroke-dasharray:5 6;
  animation:dash 1.1s linear infinite;
}
.p-vec{
  stroke:var(--accent-2);stroke-width:2.4;
  stroke-dasharray:1400;stroke-dashoffset:1400;
  filter:drop-shadow(0 0 6px rgba(110,231,200,.55));
  animation:draw 2.6s ease-in-out infinite;
}
@keyframes dash{to{stroke-dashoffset:-22}}
@keyframes draw{
  0%{stroke-dashoffset:1400;opacity:.25}
  55%{stroke-dashoffset:0;opacity:1}
  100%{stroke-dashoffset:0;opacity:.85}
}
.scanline{
  display:none;
  position:absolute;left:0;right:0;height:64px;pointer-events:none;
  background:linear-gradient(180deg,transparent,rgba(76,141,255,.16),transparent);
  animation:scan 2.2s ease-in-out infinite;
}
@keyframes scan{0%{top:-64px}100%{top:100%}}
.overlay-card{
  position:relative;z-index:2;min-width:230px;max-width:100%;padding:12px 16px;pointer-events:auto;
  background:rgba(21,25,34,.92);border:1px solid var(--line);
  border-radius:14px;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.5);
}
.pct{font-size:24px;font-weight:600;line-height:1;letter-spacing:-1px}
.pct i{font-style:normal;font-size:16px;color:var(--fg-mute);margin-left:3px}
.stage-text{margin-top:8px;font-size:12.5px;color:var(--fg-dim)}
.bar{height:4px;margin-top:14px;border-radius:2px;background:#232a36;overflow:hidden}
.bar-fill{height:100%;width:35%;border-radius:2px;background:linear-gradient(90deg,var(--accent),var(--accent-2));animation:progress-wait 1.6s ease-in-out infinite alternate}
@keyframes progress-wait{from{transform:translateX(0)}to{transform:translateX(185%)}}
.progress-note{font-size:12px;color:var(--fg-mute);margin:12px 0}
.btn-cancel{padding:8px 18px;background:var(--bg-3);border-color:var(--line);font:inherit;font-size:12px}
.btn-cancel:hover{border-color:var(--accent)}
.pipeline{display:flex;justify-content:space-between;margin-top:12px;gap:4px}
.pipeline span{
  font-size:10.5px;color:var(--fg-mute);padding:2px 6px;border-radius:5px;
  background:#1c2230;transition:all .25s;
}
.pipeline span.on{color:var(--accent-2);background:rgba(110,231,200,.12)}

.canvas-foot{
  display:flex;justify-content:space-between;align-items:center;
  padding:10px 4px 0;font-size:12px;color:var(--fg-mute);flex:none;
}
.canvas-foot #fileInfo{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.foot-right{color:var(--fg-dim);display:flex;align-items:center;flex-shrink:0;margin-left:8px}

/* ---------- 右：操作台 ---------- */
.panel{
  display:flex;flex-direction:column;gap:16px;padding:16px;
  background:var(--bg-2);border-left:1px solid var(--line);overflow-y:auto;
}
.group{display:flex;flex-direction:column;gap:9px}
.group.grow{flex:1;min-height:120px}
.group-title{font-size:12px;color:var(--fg-dim);font-weight:600;letter-spacing:.3px}
.group-title small{font-weight:400;color:var(--fg-mute);margin-left:4px}

.btn{
  border:1px solid transparent;border-radius:10px;cursor:pointer;
  font-family:inherit;color:var(--fg);transition:all .16s;text-align:left;
}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-upload{
  display:flex;flex-direction:column;gap:2px;padding:15px 16px;
  background:var(--bg-3);border-color:var(--line);
}
.btn-upload:hover:not(:disabled){border-color:var(--accent);background:#202836}
.btn-main{font-size:14px;font-weight:600}
.btn-sub{font-size:11.5px;color:var(--fg-mute)}

.chips{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}
.chip{
  padding:9px 0;border-radius:9px;background:var(--bg-3);border:1px solid var(--line);
  color:var(--fg-dim);font:600 12.5px/1 inherit;cursor:pointer;transition:all .16s;
}
.chip:hover{border-color:#33405a;color:var(--fg)}
.chip.is-on{
  color:#fff;border-color:var(--accent);
  background:linear-gradient(180deg,rgba(76,141,255,.28),rgba(76,141,255,.12));
  box-shadow:0 0 0 1px rgba(76,141,255,.35);
}

.segmented{display:flex;padding:3px;gap:3px;background:var(--bg-3);border:1px solid var(--line);border-radius:10px}
.segmented button{
  flex:1;padding:8px 0;border:0;border-radius:7px;background:transparent;
  color:var(--fg-dim);font:600 12.5px/1 inherit;cursor:pointer;transition:all .16s;
}
.segmented button.is-on{background:#2a3446;color:var(--fg);box-shadow:0 1px 3px rgba(0,0,0,.3)}
.note{margin:0;font-size:11.5px;line-height:1.5;color:var(--fg-mute)}
.note.warn{
  color:var(--warn);padding:8px 10px;border-radius:8px;
  background:rgba(255,180,84,.08);border:1px solid rgba(255,180,84,.28);
}

.btn-go{
  padding:15px 16px;display:flex;flex-direction:column;gap:3px;
  background:linear-gradient(180deg,#3f7bf0,#2f66d8);border-color:#3f7bf0;
  box-shadow:0 6px 18px rgba(63,123,240,.28);
}
.btn-go:hover:not(:disabled){filter:brightness(1.08)}
.btn-go.busy{background:linear-gradient(180deg,#39404f,#2c323e);border-color:#39404f;box-shadow:none}

.results{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:7px}
.results li{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:9px 11px;background:var(--bg-3);border:1px solid var(--line);border-radius:9px;
  font-size:12.5px;animation:slide .25s ease both;
}
@keyframes slide{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
.results li.muted{background:transparent;border-style:dashed;color:var(--fg-mute);justify-content:center}
.results li.err{border-color:rgba(255,107,107,.4);color:var(--err)}
.results li.is-sample{border-color:rgba(255,180,84,.3)}
.r-tag{
  font:600 10px/1 inherit;padding:3px 6px;border-radius:5px;flex:none;
  border:1px solid transparent;
}
.r-tag.sample{color:var(--warn);background:rgba(255,180,84,.12);border-color:rgba(255,180,84,.3)}
.r-tag.engine{color:var(--accent-2);background:rgba(110,231,200,.1);border-color:rgba(110,231,200,.28)}
.r-name{display:flex;align-items:center;gap:8px;min-width:0}
.r-fmt{
  font:700 10px/1 inherit;letter-spacing:.5px;padding:4px 6px;border-radius:5px;
  background:#2a3446;color:var(--accent-2);text-transform:uppercase;
}
.r-file{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.r-size{color:var(--fg-mute);font-size:11px;flex:none}
.r-acts{display:flex;gap:6px;flex:none}
.r-acts button{
  padding:5px 9px;border-radius:7px;background:#232b39;border:1px solid var(--line);
  color:var(--fg-dim);font:500 11.5px/1 inherit;cursor:pointer;transition:all .15s;
}
.r-acts button:hover{color:var(--fg);border-color:var(--accent)}

.log{
  flex:none;max-height:118px;overflow-y:auto;padding:9px 11px;
  background:#10141b;border:1px solid var(--line-soft);border-radius:9px;
  font:11.5px/1.65 ui-monospace,Consolas,monospace;color:var(--fg-mute);
}
.log div{white-space:pre-wrap;word-break:break-all}
.log .t{color:#4d5567}
.log .w{color:var(--warn)}
.log .e{color:var(--err)}

/* Compact amber controls; the preview remains the primary work surface. */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.group-title,.empty-hint{letter-spacing:0}
.panel{gap:24px;padding:22px 18px;background:var(--bg-2)}
.panel .group-title{font-size:15px;color:var(--accent)}
.mode-group{padding-bottom:24px;border-bottom:1px solid var(--line-soft)}
.detail-heading{display:flex;align-items:center;justify-content:space-between;gap:8px}
.detail-heading output{font-size:13px;color:var(--accent);font-variant-numeric:tabular-nums}
#colorDetail{width:100%;margin:6px 0;accent-color:var(--accent);cursor:pointer}
#colorDetail:disabled{cursor:wait;opacity:.5}
.background-toggle{display:flex;align-items:center;gap:9px;margin-top:6px;min-height:28px;color:var(--fg-dim);font-size:14px;cursor:pointer}
.background-toggle input{width:17px;height:17px;margin:0;accent-color:var(--accent)}
.background-toggle input:disabled{cursor:wait;opacity:.5}
.background-toggle input:disabled+span{opacity:.5}
.segmented{gap:8px;padding:0;background:transparent;border:0;border-radius:0}
.segmented button{min-height:44px;border:1px solid var(--line);border-radius:6px;background:#202324;font:600 15px/1.4 inherit}
.segmented button.is-on{background:var(--accent);border-color:var(--accent);color:#171914;box-shadow:none}
.segmented button:disabled{cursor:wait;opacity:.6}
.chips{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 12px}
.chips label{display:flex;align-items:center;gap:9px;min-height:32px;cursor:pointer;font-size:15px}
.chips input{width:19px;height:19px;margin:0;accent-color:var(--accent)}
.action-group{display:flex;flex-direction:column;gap:10px;margin-top:10px}
.panel .btn{display:flex;align-items:center;justify-content:center;min-height:46px;padding:10px 12px;border-radius:6px;text-align:center}
.btn-upload,.btn-upload:hover:not(:disabled){background:#202324;border-color:var(--line)}
.btn-go{background:var(--accent);border-color:var(--accent);box-shadow:none;color:#171914}
.btn-go.busy{background:#4c4b3f;border-color:#666450;color:#e8edf5}
#actionStatus{margin:0;font-size:12px;color:var(--fg-dim);overflow-wrap:anywhere}
#actionStatus.is-error{color:var(--err)}
#retryDownload{font:inherit;font-size:12px}
.view-tool[aria-pressed="true"]{background:#353327;border-color:var(--accent)}

@media (max-width:900px){
  .badges{flex-wrap:wrap}
  .stage{grid-template-columns:1fr;overflow-y:auto;display:block}
  .panel{overflow-y:visible}
  .canvas-wrap{height:clamp(470px,65vh,700px)}
  .canvas-wrap{min-height:360px}
  .canvas{min-height:300px}
  .panel{border-left:0;border-top:1px solid var(--line)}
  .canvas-foot{flex-wrap:wrap;gap:6px}
  .canvas-foot #fileInfo{flex-basis:100%}
  .foot-right{margin-left:auto}
}