:root{
  --bg:#f5f5f7;
  --card:#ffffff;
  --ink:#1d1d1f;
  --ink-2:#6e6e73;
  --line:#e3e3e6;
  --line-2:#d2d2d7;
  --blue:#0071e3;
  --blue-press:#0060c0;
  --soft:#f5f5f7;
  --soft-hover:#ececee;
  --green:#34c759;
  --radius:18px;
  --radius-sm:11px;
  --shadow:0 1px 2px rgba(0,0,0,.04),0 6px 24px rgba(0,0,0,.06);
  --shadow-lg:0 8px 40px rgba(0,0,0,.10);
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  letter-spacing:.01em;
}
button{font-family:inherit;cursor:pointer}

/* ---------- Buttons ---------- */
.btn{
  border:none;border-radius:980px;
  padding:7px 16px;font-size:13px;font-weight:500;
  transition:all .18s ease;line-height:1.2;
}
.btn-ghost{background:transparent;color:var(--ink);}
.btn-ghost:hover{background:rgba(0,0,0,.05)}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-press)}
.btn-primary:active{transform:scale(.98)}
.btn-soft{background:var(--soft);color:var(--ink);border:1px solid var(--line)}
.btn-soft:hover{background:var(--soft-hover)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn:disabled:hover{background:var(--soft)}
.btn.full{width:100%;padding:11px;font-size:14px;border-radius:12px;margin-top:8px}
.btn-row{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:8px}
.btn-row .btn{padding:10px;font-size:13px;border-radius:12px}

.icon-btn{
  width:30px;height:30px;border:1px solid var(--line);
  background:#fff;border-radius:9px;color:var(--ink);
  font-size:15px;display:grid;place-items:center;transition:all .15s;
}
.icon-btn:hover{background:var(--soft);border-color:var(--line-2)}

/* ---------- Layout ---------- */
.layout{
  max-width:1480px;margin:0 auto;
  display:grid;grid-template-columns:minmax(0,1fr) 320px;
  gap:18px;padding:24px 24px 60px;
}
.stage-col{display:flex;flex-direction:column;gap:18px;min-width:0}
.panel-col{display:flex;flex-direction:column;gap:18px}

.card{
  background:var(--card);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  border:1px solid rgba(0,0,0,.04);
}

/* ---------- Stage ---------- */
.stage-toolbar{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:12px 16px;border-bottom:1px solid var(--line);
}
.file-actions{display:inline-flex;gap:8px}
.card-head-actions{display:inline-flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.seg{
  display:inline-flex;background:var(--soft);
  border-radius:10px;padding:2px;gap:2px;
}
.seg-btn{
  border:none;background:transparent;color:var(--ink-2);
  padding:6px 13px;font-size:13px;font-weight:500;border-radius:8px;
  transition:all .15s;
}
.seg-btn.active{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.seg-sm .seg-btn{padding:5px 10px;font-size:12px}

.tool-group{display:inline-flex;gap:4px;margin-left:auto}
.tool{
  width:34px;height:34px;border:1px solid var(--line);
  background:#fff;border-radius:10px;font-size:16px;
  display:grid;place-items:center;transition:all .15s;color:var(--ink);
}
.tool:hover{background:var(--soft)}
.tool.active{background:var(--blue);border-color:var(--blue);color:#fff}

.zoom-group{display:inline-flex;align-items:center;gap:6px}
.zoom-label{font-size:12px;color:var(--ink-2);min-width:42px;text-align:center}

.canvas-wrap{
  position:relative;width:100%;height:560px;
  background:
    linear-gradient(45deg,#fafafa 25%,transparent 25%) -10px 0,
    linear-gradient(-45deg,#fafafa 25%,transparent 25%) -10px 0,
    linear-gradient(45deg,transparent 75%,#fafafa 75%),
    linear-gradient(-45deg,transparent 75%,#fafafa 75%);
  background-size:20px 20px;background-color:#fff;
  border-radius:0 0 var(--radius) var(--radius);
  overflow:hidden;cursor:grab;touch-action:none;overscroll-behavior:contain;
  -webkit-user-select:none;user-select:none;
}
.canvas-wrap.grabbing{cursor:grabbing}
.canvas-wrap.crosshair{cursor:crosshair}
#view{position:absolute;top:0;left:0;transform-origin:0 0;image-rendering:auto;touch-action:none}

.count-badge{
  position:absolute;top:14px;left:14px;
  background:rgba(29,29,31,.82);color:#fff;
  backdrop-filter:blur(8px);
  padding:7px 14px;border-radius:980px;
  font-size:14px;font-weight:600;
  box-shadow:var(--shadow);
}
.count-badge::before{content:"菌落 ";font-weight:400;opacity:.8}

/* ---------- Empty state ---------- */
.empty-state{
  position:absolute;inset:0;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:6px;text-align:center;
}
.empty-icon{font-size:54px;margin-bottom:6px}
.empty-title{font-size:19px;font-weight:600}
.empty-sub{font-size:13px;color:var(--ink-2);margin-bottom:14px}

/* ---------- Data card (table + chart) ---------- */
.card-head{
  display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;
  padding:16px 18px;border-bottom:1px solid var(--line);
}
.card-head h3{font-size:16px;font-weight:600}
.card-title-block{display:flex;flex-direction:column;gap:3px;min-width:180px}
.sample-status{font-size:12px;color:var(--ink-2);line-height:1.35}
.btn.btn-soft{padding:7px 14px;font-size:13px;border-radius:980px}

.table-wrap{padding:6px 18px 0;position:relative}
.data-table{width:100%;border-collapse:collapse;font-size:13px}
.data-table th{
  text-align:left;color:var(--ink-2);font-weight:500;
  padding:10px 8px;border-bottom:1px solid var(--line);font-size:12px;
}
.data-table td{padding:9px 8px;border-bottom:1px solid var(--line)}
.data-table tr:last-child td{border-bottom:none}
.data-table tr.current-sample td{background:#f7fbff}
.select-col{width:34px;text-align:center}
.sample-check{
  width:16px;height:16px;accent-color:var(--blue);
  vertical-align:middle;cursor:pointer;
}
.sample-check:disabled{cursor:not-allowed}
.data-table .name-cell{font-weight:500}
.data-table .name-cell[contenteditable]{
  outline:none;border-radius:6px;padding:3px 6px;margin:-3px -6px;
}
.data-table .name-cell[contenteditable]:focus{background:var(--soft);box-shadow:0 0 0 2px var(--blue)}
.count-pill{
  background:#eef6ff;color:var(--blue);font-weight:600;
  padding:2px 10px;border-radius:980px;font-size:12px;
}
.row-del{
  border:none;background:transparent;color:var(--ink-2);
  font-size:15px;width:26px;height:26px;border-radius:7px;transition:all .15s;
}
.row-del:hover{background:#ffecec;color:#ff3b30}
.row-actions{display:flex;gap:4px}
.table-empty{
  padding:26px;text-align:center;color:var(--ink-2);font-size:13px;
}
.chart-wrap{padding:14px 18px 18px;height:260px;position:relative}
#chart{width:100%;height:100%}

/* ---------- Panel ---------- */
.panel-card{padding:18px}
.panel-title{font-size:15px;font-weight:600;margin-bottom:14px}
.field{margin-bottom:16px}
.field>label{
  display:block;font-size:12.5px;color:var(--ink-2);margin-bottom:7px;font-weight:500;
}
.field>label b{color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums}
.field .hint{color:var(--line-2);font-weight:400}
.field.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field.two>div{margin:0}

input[type=range]{
  -webkit-appearance:none;width:100%;height:4px;border-radius:4px;
  background:var(--line-2);outline:none;
}
input[type=range]:disabled{opacity:.48;cursor:not-allowed}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;width:18px;height:18px;border-radius:50%;
  background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.25);cursor:pointer;
  border:.5px solid rgba(0,0,0,.04);transition:transform .12s;
}
input[type=range]::-webkit-slider-thumb:active{transform:scale(1.15)}
input[type=range]:disabled::-webkit-slider-thumb{cursor:not-allowed}

.font-mode-row{display:flex;align-items:center;margin-bottom:10px}

.field.check{display:flex;gap:18px}
.switch{display:flex;align-items:center;gap:7px;font-size:13px;color:var(--ink);cursor:pointer}
.switch input{
  -webkit-appearance:none;width:38px;height:23px;border-radius:980px;
  background:var(--line-2);position:relative;transition:background .2s;cursor:pointer;flex:none;
}
.switch input::after{
  content:"";position:absolute;top:2px;left:2px;width:19px;height:19px;
  border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.3);transition:transform .2s;
}
.switch input:checked{background:var(--green)}
.switch input:checked::after{transform:translateX(15px)}

.color-row{display:flex;align-items:center;gap:12px}
input[type=color]{
  width:46px;height:34px;border:1px solid var(--line);border-radius:9px;
  background:#fff;cursor:pointer;padding:3px;
}
.slider-mini{display:flex;align-items:center;gap:8px;flex:1;font-size:12px;color:var(--ink-2)}
.slider-mini input{flex:1}
.slider-mini b{color:var(--ink);font-variant-numeric:tabular-nums}

/* 面积范围控件 */
.area-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.area-cell{display:flex;flex-direction:column;gap:8px}
.area-row{display:flex;align-items:center;gap:6px}
.area-tag{font-size:11.5px;color:var(--ink-2);flex:none}
.area-cell input[type=range]{width:100%;min-width:0}
.area-num{
  flex:1;min-width:0;width:100%;border:1px solid var(--line);border-radius:8px;
  padding:6px 7px;font-size:13px;font-family:inherit;color:var(--ink);
  text-align:right;font-variant-numeric:tabular-nums;outline:none;
  transition:border-color .15s,box-shadow .15s;-moz-appearance:textfield;
}
.area-num::-webkit-outer-spin-button,
.area-num::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.area-num:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(0,113,227,.14)}
.area-pick{
  width:28px;height:28px;flex:none;border:1px solid var(--line);
  background:#fff;border-radius:8px;font-size:13px;color:var(--ink-2);
  display:grid;place-items:center;transition:all .15s;padding:0;
}
.area-pick:hover{background:var(--soft);color:var(--ink);border-color:var(--line-2)}
.area-pick.active{background:var(--blue);border-color:var(--blue);color:#fff}

.result-box{
  margin-top:16px;background:var(--soft);border-radius:13px;
  padding:14px 16px;display:flex;align-items:center;justify-content:space-between;
}
.result-label{font-size:13px;color:var(--ink-2)}
.result-num{font-size:30px;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:-.02em}

.tips-card .tips{list-style:none;display:flex;flex-direction:column;gap:9px}
.tips li{font-size:12.5px;color:var(--ink-2);line-height:1.5;padding-left:16px;position:relative}
.tips li::before{content:"·";position:absolute;left:4px;color:var(--blue);font-weight:700}
.tips b{color:var(--ink);font-weight:600}

/* ---------- Toast ---------- */
.toast{
  position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(20px);
  background:rgba(29,29,31,.9);color:#fff;backdrop-filter:blur(10px);
  padding:11px 20px;border-radius:980px;font-size:13.5px;font-weight:500;
  display:flex;align-items:center;gap:14px;
  box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:all .3s;z-index:100;
}
.toast.has-action{pointer-events:auto}
.toast button{
  border:none;background:transparent;color:#8ec5ff;font:inherit;font-weight:700;
  padding:0;cursor:pointer;white-space:nowrap;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- Responsive ---------- */
@media(max-width:1080px){
  .layout{grid-template-columns:1fr}
  .panel-col{flex-direction:row;flex-wrap:wrap}
  .panel-card{flex:1;min-width:280px}
}
@media(max-width:680px){
  .stage-toolbar{gap:8px}
  .tool-group{margin-left:0}
  .canvas-wrap{height:380px}
}
.spin{animation:spin 1s linear infinite;display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}