#feature-01-container{
  --bg:var(--pink-soft);--paper:var(--cream);--paper-2:#fff;
  --ink:var(--text-color);--ink-soft:var(--muted-color);--ink-faint:#8a7379;
  --line:var(--border-color);--line-soft:rgba(135,36,38,.08);
  --tool-a:var(--primary-color);--tool-b:#4a8a9a;--tool-c:#b58433;
  --purple:#4a8a9a;--purple-soft:#edf5f6;--ok:#4a8a9a;--ok-soft:#edf5f6;
  --serif:var(--font-serif);--sans:var(--font-sans);--mono:var(--font-mono);
}
@media (max-width:600px){
  #feature-01-container.feature-container .input-matrix-wrapper{grid-template-columns:1fr}
}
@media (max-width:480px){
  #feature-01-container.feature-container .input-field{
    grid-template-columns:minmax(86px,1fr) minmax(54px,1fr) auto 28px;
    gap:5px;
    padding:5px 6px;
  }
  #feature-01-container.feature-container .input-field label{
    font-size:.72rem;
    line-height:1.2;
    white-space:normal;
  }
  #feature-01-container.feature-container .input-field input{font-size:.85rem}
  #feature-01-container.feature-container .unit{min-width:22px}
  #feature-01-container.feature-container .lock{width:28px}
}
#feature-01-container .bg{position:fixed;inset:0;z-index:-2;pointer-events:none}#feature-01-container .bg__graph{background-image:linear-gradient(var(--line-soft) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);background-size:34px 34px;
    -webkit-mask-image:radial-gradient(120% 100% at 50% 30%,#000 40%,transparent 100%);
    mask-image:radial-gradient(120% 100% at 50% 30%,#000 40%,transparent 100%)}#feature-01-container .bg__glow{background:radial-gradient(60% 50% at 20% 12%,rgba(229,72,58,.10),transparent 70%),
    radial-gradient(55% 45% at 82% 20%,rgba(31,158,142,.10),transparent 70%),
    radial-gradient(60% 55% at 50% 92%,rgba(224,161,44,.09),transparent 70%)}#feature-01-container .grain{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;mix-blend-mode:multiply;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.35'/%3E%3C/svg%3E")}#feature-01-container .shell{max-width:1160px;margin:0 auto;padding:0 clamp(18px,4vw,44px)}#feature-01-container .topbar{display:flex;justify-content:space-between;align-items:flex-end;
    padding:clamp(24px,4vw,46px) 0 18px;border-bottom:1px solid var(--line);
    margin-bottom:clamp(28px,4vw,52px)}#feature-01-container .eyebrow{display:flex;align-items:center;gap:12px;font-family:var(--mono);
    font-size:.72rem;letter-spacing:.34em;text-transform:uppercase;color:var(--ink-soft);font-weight:500}#feature-01-container .eyebrow::before{content:"";width:34px;height:1px;background:var(--ink-soft)}#feature-01-container .dot{width:7px;height:7px;border-radius:50%;background:var(--tool-a);
    box-shadow:0 0 0 4px rgba(229,72,58,.16);animation:blink 2.4s ease-in-out infinite}@keyframes blink{50%{opacity:.25}}#feature-01-container .brand{font-family:var(--mono);font-size:.85rem;letter-spacing:.18em;
    text-transform:uppercase;font-weight:600;display:flex;gap:8px}#feature-01-container .brand b{color:var(--tool-b)}#feature-01-container .intro{display:grid;grid-template-columns:1fr;gap:clamp(24px,5vw,56px);
    align-items:end;margin-bottom:clamp(32px,5vw,60px)}#feature-01-container .intro h1{font-family:var(--serif);font-weight:560;font-size:clamp(2.7rem,8vw,5.6rem);
    line-height:.94;letter-spacing:-.02em;margin:16px 0 0}#feature-01-container .intro h1 em{font-style:italic;color:var(--tool-a)}#feature-01-container .intro p{max-width:46ch;color:var(--ink-soft);font-size:1.05rem;margin:22px 0 0}#feature-01-container .meta{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}#feature-01-container .chip{font-family:var(--mono);font-size:.72rem;letter-spacing:.06em;padding:8px 13px;
    border:1px solid var(--line);border-radius:100px;background:var(--paper);
    color:var(--ink-soft);display:flex;align-items:center;gap:8px;
    transition:transform .35s cubic-bezier(.16,1,.3,1),border-color .35s,color .35s}#feature-01-container .chip:hover{transform:translateY(-3px);color:var(--ink);border-color:var(--ink)}#feature-01-container .chip i{width:8px;height:8px;border-radius:2px;display:inline-block}#feature-01-container .tool-card{background:var(--paper);border:1px solid var(--line);border-radius:22px;
    padding:clamp(22px,3.5vw,40px);box-shadow:0 30px 60px -34px rgba(22,23,27,.35),
    0 2px 0 rgba(255,255,255,.6) inset;margin-bottom:70px}#feature-01-container .tool-sub{font-family:var(--mono);font-size:.72rem;letter-spacing:.28em;
    text-transform:uppercase;color:var(--tool-a);font-weight:600}#feature-01-container .tool-card h3{font-family:var(--serif);font-weight:540;font-size:clamp(1.9rem,4vw,2.7rem);
    line-height:1;margin:10px 0 0;letter-spacing:-.01em}#feature-01-container .tool-card>p{margin:16px 0 26px;font-family:var(--serif);font-size:1.1rem;
    color:var(--ink-soft);max-width:56ch}#feature-01-container .seg-control{display:inline-flex;gap:4px;padding:5px;background:var(--paper-2);
    border:1px solid var(--line);border-radius:100px;margin-bottom:16px}#feature-01-container .seg-btn{border:0;background:transparent;font-family:var(--sans);font-weight:600;
    font-size:.85rem;padding:9px 18px;border-radius:100px;cursor:pointer;
    color:var(--ink-soft);transition:color .3s,background .3s;white-space:nowrap}#feature-01-container .seg-btn:hover{color:var(--ink)}#feature-01-container .seg-btn.active{background:var(--ink);color:var(--paper)}#feature-01-container .reset-btn{display:inline-flex;align-items:center;gap:8px;margin-left:14px;
    border:1px solid var(--line);background:var(--paper-2);font-family:var(--sans);
    font-weight:600;font-size:.85rem;padding:9px 18px;border-radius:100px;cursor:pointer;
    color:var(--ink-soft);transition:all .25s}#feature-01-container .reset-btn:hover{border-color:var(--tool-a);color:var(--tool-a)}#feature-01-container .tool-body{display:grid;grid-template-columns:1fr;gap:clamp(24px,4vw,46px)}#feature-01-container .panel{background:var(--paper-2);border:1px solid var(--line);border-radius:16px;
    padding:clamp(18px,2.5vw,26px)}#feature-01-container .viz-box{background:var(--paper-2);border:1px solid var(--line);border-radius:16px;padding:12px;
    position:relative}#feature-01-container .drag-hint{position:absolute;top:20px;left:24px;font-family:var(--mono);font-size:.72rem;
    letter-spacing:.05em;color:var(--ink-faint);background:var(--paper-2);border:1px solid var(--line);
    border-radius:100px;padding:5px 12px;pointer-events:none;transition:opacity .4s}#feature-01-container .drag-hint.hide{opacity:0}#feature-01-container #triSvg{width:100%;height:auto;aspect-ratio:1/1;display:block;touch-action:none;cursor:default}#feature-01-container .v-grid line{stroke:var(--line);stroke-width:1}#feature-01-container .v-shape{fill:rgba(31,158,142,.13);stroke:var(--ink);stroke-width:2.6;
    stroke-linejoin:round;stroke-linecap:round}#feature-01-container .v-angle{fill:none;stroke:var(--tool-c);stroke-width:2.4}#feature-01-container .v-med{fill:none;stroke:var(--tool-c);stroke-width:1.4;stroke-dasharray:6 6;opacity:.6}#feature-01-container .v-vert{fill:none;stroke:var(--tool-a);stroke-width:1.4;stroke-dasharray:5 5;opacity:.6}#feature-01-container .v-perp{fill:none;stroke:var(--tool-b);stroke-width:1.4;stroke-dasharray:5 5;opacity:.55}#feature-01-container .v-ic{fill:none;stroke:var(--tool-c);stroke-width:1.6}#feature-01-container .v-circ{fill:none;stroke:var(--tool-b);stroke-width:1.6;opacity:.5}#feature-01-container .v-pt-a{fill:var(--tool-a)}#feature-01-container .v-pt-b{fill:var(--tool-b)}#feature-01-container .v-pt-c{fill:var(--tool-c)}#feature-01-container .v-pt-ink{fill:var(--ink)}#feature-01-container .v-pt-circ{fill:var(--ink)}#feature-01-container .v-pt-9{fill:var(--ink-faint)}#feature-01-container .v-lbl{font-family:var(--mono);font-weight:600;font-size:15px;fill:var(--ink);
    dominant-baseline:middle;text-anchor:middle}#feature-01-container .v-vtx{cursor:grab;transition:r .15s}#feature-01-container .v-vtx:hover{r:8}#feature-01-container .v-vtx.dragging{cursor:grabbing}#feature-01-container .v-vtx-locked{stroke:var(--purple);stroke-width:3;paint-order:stroke}#feature-01-container .v-hit{fill:transparent;cursor:grab}#feature-01-container .v-hit:hover{fill:rgba(255,255,255,.0)}#feature-01-container .anim-float{animation:feature01-float 9s ease-in-out infinite;transform-origin:center}@keyframes feature01-float{50%{transform:translateY(-7px)}}#feature-01-container .anim-pulse{transform-box:fill-box;transform-origin:center;animation:feature01-pulse 2.4s ease-in-out infinite}#feature-01-container .anim-pulse{pointer-events:none}@keyframes feature01-pulse{0%,100%{transform:scale(1);opacity:.9}50%{transform:scale(1.9);opacity:.2}}#feature-01-container .legend-wrap{margin-top:14px;border-top:1px solid var(--line-soft);padding-top:12px}#feature-01-container .legend-toggle{display:flex;align-items:center;gap:8px;width:100%;border:0;background:transparent;
    cursor:pointer;font-family:var(--sans);font-weight:600;font-size:.85rem;color:var(--ink-soft);
    padding:6px 0;transition:color .25s}#feature-01-container .legend-toggle:hover{color:var(--ink)}#feature-01-container .legend-toggle .chev{transition:transform .35s cubic-bezier(.16,1,.3,1)}#feature-01-container .legend-toggle[aria-expanded="true"] .chev{transform:rotate(180deg)}#feature-01-container .legend-collapse{display:grid;grid-template-rows:0fr;transition:grid-template-rows .4s cubic-bezier(.16,1,.3,1)}#feature-01-container .legend-collapse>div{overflow:hidden}#feature-01-container .legend-collapse.open{grid-template-rows:1fr}#feature-01-container .legend{display:flex;flex-wrap:wrap;gap:12px 20px;padding-top:10px;
    font-size:.82rem;color:var(--ink-soft)}#feature-01-container .legend .lg{display:flex;align-items:center;gap:8px}#feature-01-container .legend .sw{width:13px;height:13px;border-radius:50%;flex-shrink:0}#feature-01-container .legend .ln{width:18px;height:0;border-top:2px dashed var(--tool-c);flex-shrink:0}#feature-01-container .legend .ln.vert{border-color:var(--tool-a)}#feature-01-container .legend .ln.perp{border-color:var(--tool-b)}#feature-01-container .input-matrix-wrapper{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 8px;
  }@media (max-width: 600px){#feature-01-container .input-matrix-wrapper{
      grid-template-columns: 1fr 1fr;
    }
  }#feature-01-container .input-matrix{
    display: flex;
    flex-direction: column;
    gap: 12px;
  }#feature-01-container .input-field{
    position:relative;
    display:grid;
    grid-template-columns: minmax(0,1fr) minmax(52px,1fr) auto 32px;
    align-items:center;
    gap:6px;
    background:var(--paper-2);
    border:1.5px solid var(--line);
    border-radius:11px;
    padding:5px 8px;
    transition:border-color .25s,box-shadow .25s;
    width: 100%;
  }#feature-01-container .input-field:focus-within{border-color:var(--tool-b);box-shadow:0 0 0 4px rgba(31,158,142,.14)}#feature-01-container .input-field.is-fixed{border-color:var(--purple);background:var(--purple-soft)}#feature-01-container .input-field.is-fixed:focus-within{box-shadow:0 0 0 4px rgba(107,79,184,.18)}#feature-01-container .input-field label{font-size:.82rem;color:var(--ink-soft);font-weight:600}#feature-01-container .input-field input{
    border:0;
    background:transparent;
    font-family:var(--mono);
    font-weight:600;
    font-size:.95rem;
    color:var(--ink);
    text-align:right;
    padding:4px 2px;
    min-width:0;
    appearance:textfield;
    -moz-appearance:textfield;
    width: 100%;
  }#feature-01-container .input-field input:focus{outline:none}#feature-01-container .input-field input::-webkit-outer-spin-button, #feature-01-container .input-field input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}#feature-01-container .input-field input:disabled{color:var(--ink-faint)}#feature-01-container .unit{font-family:var(--mono);font-size:.78rem;color:var(--ink-faint);min-width:30px;text-align:center}#feature-01-container .input-field.disabled{opacity:.55}#feature-01-container .lock{
    border:1.5px solid var(--line);
    border-radius:8px;
    width:32px;
    height:32px;
    cursor:pointer;
    display:grid;
    place-items:center;
    color:var(--ink-faint);
    transition:all .25s;
    flex-shrink:0;
    padding:0;
    background:var(--paper);
  }#feature-01-container .lock:hover{border-color:var(--ink);color:var(--ink)}#feature-01-container .lock:focus-visible{outline:2px solid var(--tool-b);outline-offset:2px}#feature-01-container .lock svg{width:16px;height:16px;display:block}#feature-01-container .lock.is-locked{background:var(--purple);border-color:var(--purple);color:#fff}#feature-01-container .lock.is-locked svg{stroke:#fff}#feature-01-container .lock.disabled{opacity:.5;cursor:default}#feature-01-container .lock.disabled svg{stroke:var(--ink-faint)}#feature-01-container .data-panel{background:var(--paper-2);border:1px solid var(--line);border-radius:14px;padding:6px 18px}#feature-01-container .data-row{display:flex;justify-content:space-between;align-items:center;gap:16px;
    padding:11px 0;border-bottom:1px solid var(--line-soft)}#feature-01-container .data-row:last-child{border-bottom:0}#feature-01-container .data-row .lab{display:flex;align-items:center;gap:10px;color:var(--ink-soft);font-size:.9rem}#feature-01-container .data-row .lab .ic{width:13px;height:13px;border-radius:3px;flex-shrink:0;display:inline-block}#feature-01-container .data-val{font-family:var(--mono);font-weight:600;font-size:1rem}#feature-01-container .hl-a{color:var(--tool-a)}#feature-01-container .hl-b{color:var(--tool-b)}#feature-01-container .hl-c{color:var(--tool-c)}#feature-01-container .tri-collapse{display:grid;grid-template-rows:0fr;transition:grid-template-rows .45s cubic-bezier(.16,1,.3,1)}#feature-01-container .tri-collapse>div{overflow:hidden}#feature-01-container .tri-collapse.open{grid-template-rows:1fr}#feature-01-container .tri-toggle{display:flex;align-items:center;gap:8px;width:100%;border:0;background:transparent;
    cursor:pointer;font-family:var(--sans);font-weight:600;font-size:.85rem;color:var(--ink-soft);
    padding:11px 0;margin-top:2px;transition:color .25s}#feature-01-container .tri-toggle:hover{color:var(--ink)}#feature-01-container .tri-toggle .chev{transition:transform .35s cubic-bezier(.16,1,.3,1)}#feature-01-container .tri-toggle[aria-expanded="true"] .chev{transform:rotate(180deg)}#feature-01-container .tri-msg{display:none;gap:9px;align-items:flex-start;margin:0 0 12px;
    font-size:.88rem;border:1px solid;border-radius:10px;padding:11px 14px}#feature-01-container .tri-msg.show{display:flex;animation:feature01-shake .4s ease}#feature-01-container .tri-msg .mk{font-family:var(--mono);font-weight:700;flex-shrink:0;
    width:20px;height:20px;border-radius:50%;display:grid;place-items:center;font-size:.8rem;color:#fff}#feature-01-container .tri-msg.is-note{color:var(--ink);background:var(--ok-soft);border-color:rgba(31,158,142,.28)}#feature-01-container .tri-msg.is-note .mk{background:var(--ok)}#feature-01-container .tri-msg.is-error{color:var(--tool-a);background:rgba(229,72,58,.07);border-color:rgba(229,72,58,.22)}#feature-01-container .tri-msg.is-error .mk{background:var(--tool-a)}#feature-01-container .tri-msg.toolbar-msg{margin:0;flex:1 1 240px;min-width:180px}#feature-01-container .toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:14px}#feature-01-container .toolbar .seg-control{margin:0}#feature-01-container .toolbar .reset-btn{margin-left:auto}#feature-01-container .v-dim{font-size:12px;paint-order:stroke;stroke:var(--paper-2);stroke-width:4px;stroke-linejoin:round}#feature-01-container .v-angle-label{font-size:11px;fill:var(--tool-a);paint-order:stroke;stroke:var(--paper-2);stroke-width:3px;stroke-linejoin:round}#feature-01-container .v-height{stroke:var(--tool-a);stroke-width:1.6;stroke-dasharray:5 4;opacity:.75}#feature-01-container .v-select{pointer-events:none}#feature-01-container .v-select rect{fill:var(--ink);rx:5;opacity:.92}#feature-01-container .v-select text{fill:#fff;font-family:var(--mono);font-size:12px;font-weight:600}@keyframes feature01-shake{25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}#feature-01-container .foot{border-top:1px solid var(--line);padding-top:24px;display:flex;
    justify-content:space-between;flex-wrap:wrap;gap:14px;font-family:var(--mono);
    font-size:.75rem;letter-spacing:.1em;color:var(--ink-faint)}#feature-01-container .reveal{opacity:0;transform:translateY(26px);
    transition:opacity .8s cubic-bezier(.16,1,.3,1),transform .8s cubic-bezier(.16,1,.3,1)}#feature-01-container .reveal.in{opacity:1;transform:none}@media (max-width:860px){#feature-01-container .intro{grid-template-columns:1fr;align-items:start}#feature-01-container .topbar{align-items:flex-start;flex-direction:column;gap:14px}
  }@media (max-width:480px){#feature-01-container .seg-btn{padding:8px 13px;font-size:.8rem}#feature-01-container .input-matrix-wrapper{gap:8px}#feature-01-container .input-matrix{gap:6px}#feature-01-container .input-field{grid-template-columns:minmax(0,38px) minmax(28px,1fr) 20px 28px;gap:3px;padding:3px 4px}#feature-01-container .input-field label{font-size:.66rem;white-space:nowrap}#feature-01-container .input-field input{font-size:.8rem}#feature-01-container .unit{min-width:20px;font-size:.68rem}#feature-01-container .lock{width:28px;height:28px}#feature-01-container .toolbar .reset-btn{margin-left:0}
  }@media (prefers-reduced-motion:reduce){#feature-01-container .reveal{opacity:1;transform:none;transition:none}#feature-01-container .anim-float, #feature-01-container .anim-pulse, #feature-01-container .dot{animation:none}#feature-01-container .tri-collapse, #feature-01-container .legend-collapse{transition:none}
  }

/* ---- Viewport-Navigation (Zoom) & Layer-Visibility ---- */
#feature-01-container #triSvg{max-height:none}
#feature-01-container #panel-svg .viz-box{max-width:720px;margin-left:auto;margin-right:auto}
#feature-01-container .viz-zoom{position:absolute;top:14px;right:14px;display:flex;gap:6px;z-index:2}
#feature-01-container .viz-zoom-btn{width:34px;height:34px;display:grid;place-items:center;padding:0;
  border:1px solid var(--line);border-radius:10px;background:var(--paper-2);color:var(--ink);
  font-family:var(--mono);font-size:1rem;line-height:1;cursor:pointer;
  transition:border-color .2s,color .2s,background .2s}
#feature-01-container .viz-zoom-btn:hover:not(:disabled){border-color:var(--tool-a);color:var(--tool-a)}
#feature-01-container .viz-zoom-btn:disabled{opacity:.38;cursor:not-allowed}
#feature-01-container .viz-zoom-btn:focus-visible{outline:2px solid var(--tool-b);outline-offset:2px}
#feature-01-container .tri-layers{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;
  margin:14px 0 0;padding:8px 14px 10px;min-width:0;border:1px solid var(--line);border-radius:12px}
#feature-01-container .tri-layers legend{font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--ink-soft);padding:0 6px}
#feature-01-container .tri-layer{display:inline-flex;align-items:center;gap:7px;font-family:var(--sans);
  font-size:.82rem;color:var(--ink);cursor:pointer;user-select:none}
#feature-01-container .tri-layer input{width:16px;height:16px;margin:0;accent-color:var(--tool-a);cursor:pointer}
#feature-01-container .tri-layer:focus-within{outline:2px solid var(--tool-b);outline-offset:2px;border-radius:4px}
@media (max-width:600px){
  #feature-01-container #panel-svg{padding:12px}
  #feature-01-container #panel-svg .viz-box{padding:8px;min-height:0}
  #feature-01-container .drag-hint{top:10px;left:10px;max-width:calc(100% - 92px);
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:.64rem;padding:4px 9px}
  #feature-01-container .viz-zoom{top:8px;right:8px;gap:4px}
  #feature-01-container .viz-zoom-btn{width:30px;height:30px;font-size:.9rem}
  #feature-01-container .tri-layers{padding:8px 10px 10px;gap:6px 12px;margin-top:10px}
  #feature-01-container .tri-layer{font-size:.76rem}
}