/* ============================================================
   Cutout — light UI
   ============================================================ */
:root{
  --ink:#0F1216;
  --ink-2:#3B4250;
  --muted:#78808E;
  --paper:#FFFFFF;
  --wash:#EFF1F4;
  --line:#E4E7EC;
  --line-2:#D3D7DF;
  --accent:#3A46F0;
  --accent-ink:#2A34C8;
  --accent-wash:#EDEEFE;
  --danger:#D93B3B;

  --rail:76px;
  --panel:290px;
  --top:58px;

  --r-sm:8px; --r-md:11px; --r-lg:16px;
  --sh-1:0 1px 2px rgba(15,18,22,.06), 0 1px 1px rgba(15,18,22,.04);
  --sh-2:0 4px 16px rgba(15,18,22,.10), 0 1px 3px rgba(15,18,22,.06);
  --sh-3:0 18px 48px rgba(15,18,22,.16), 0 2px 8px rgba(15,18,22,.08);
  --mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Inter,Roboto,"Helvetica Neue",sans-serif;
  --checker:#DFE2E8;
}

*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{
  font-family:var(--sans);color:var(--ink);background:var(--wash);
  overflow:hidden;overscroll-behavior:none;-webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
}
button,input{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
h1,h2,h3,p{margin:0}
svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
kbd{font-family:var(--mono);font-size:10.5px;line-height:1;background:var(--paper);border:1px solid var(--line-2);
  border-bottom-width:2px;border-radius:5px;padding:3px 5px;color:var(--ink-2);white-space:nowrap}
:focus{outline:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::selection{background:var(--accent);color:#fff}

.app{
  display:grid;height:100dvh;
  grid-template-columns:var(--rail) 1fr var(--panel);
  grid-template-rows:var(--top) 1fr;
  grid-template-areas:"top top top" "rail stage panel";
}

/* ─────────── top bar ─────────── */
.topbar{
  grid-area:top;display:flex;align-items:center;gap:8px;padding:0 14px;
  background:var(--paper);border-bottom:1px solid var(--line);z-index:30;
}
.brand{display:flex;align-items:center;gap:9px;padding-right:4px}
.mark{
  width:22px;height:22px;border-radius:6px;background:var(--paper);
  box-shadow:inset 0 0 0 1px var(--line-2);
  background-image:linear-gradient(45deg,var(--accent) 25%,transparent 25%),
    linear-gradient(-45deg,var(--accent) 25%,transparent 25%),
    linear-gradient(45deg,transparent 75%,var(--accent) 75%),
    linear-gradient(-45deg,transparent 75%,var(--accent) 75%);
  background-size:11px 11px;background-position:0 0,0 5.5px,5.5px -5.5px,-5.5px 0;
}
.wordmark{font-size:14.5px;font-weight:640;letter-spacing:-.015em}
.doc{display:flex;flex-direction:column;justify-content:center;min-width:0;
  padding-left:12px;margin-left:4px;border-left:1px solid var(--line)}
.doc b{font-size:12.5px;font-weight:560;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;
  text-overflow:ellipsis;max-width:26vw}
.doc span{font-family:var(--mono);font-size:10px;color:var(--muted);letter-spacing:.02em}
.spacer{flex:1}

.group{display:flex;align-items:center;gap:2px}
.icon-btn{width:34px;height:34px;border-radius:var(--r-sm);display:grid;place-items:center;color:var(--ink-2);
  transition:background .13s,color .13s,opacity .13s}
.icon-btn:hover:not(:disabled){background:var(--wash);color:var(--ink)}
.icon-btn:active:not(:disabled){transform:scale(.96)}
.icon-btn:disabled{opacity:.3;cursor:default}

.zoom{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;height:34px;margin:0 2px}
.zoom .icon-btn{border-radius:0;width:30px;height:32px}
.zoom-level{font-family:var(--mono);font-size:11px;width:56px;height:32px;color:var(--ink-2);
  border-left:1px solid var(--line);border-right:1px solid var(--line)}
.zoom-level:hover{background:var(--wash)}

.btn{height:34px;padding:0 13px;border-radius:var(--r-md);border:1px solid var(--line-2);
  background:var(--paper);font-size:12.5px;font-weight:520;letter-spacing:-.005em;
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  transition:background .13s,border-color .13s,box-shadow .13s,transform .08s;white-space:nowrap}
.btn svg{width:16px;height:16px}
.btn:hover{background:var(--wash);border-color:var(--line-2)}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:580;box-shadow:var(--sh-1)}
.btn.primary:hover{background:var(--accent-ink);border-color:var(--accent-ink)}
.btn.ghost{border-color:transparent;color:var(--ink-2)}
.btn.ghost:hover{background:var(--wash)}
.btn.ghost.held{background:var(--accent-wash);color:var(--accent-ink)}
.btn.lg{height:42px;padding:0 22px;font-size:14px;border-radius:12px}
.btn.wide{width:100%;justify-content:flex-start;margin-bottom:8px}
.btn.subtle{color:var(--ink-2);border-color:var(--line);justify-content:center;background:transparent}
.btn.subtle:hover{background:var(--wash)}
.only-narrow{display:none}

/* ─────────── tool rail ─────────── */
.rail{grid-area:rail;background:var(--paper);border-right:1px solid var(--line);
  display:flex;flex-direction:column;align-items:center;gap:2px;padding:10px 0;z-index:20}
.rail hr{width:34px;height:1px;background:var(--line);border:0;margin:7px 0}
.tool{width:60px;padding:9px 0 7px;border-radius:var(--r-md);display:grid;justify-items:center;gap:5px;
  color:var(--ink-2);transition:background .13s,color .13s}
.tool svg{width:21px;height:21px}
.tool em{font-style:normal;font-size:10px;font-weight:520;letter-spacing:.005em}
.tool:hover{background:var(--wash);color:var(--ink)}
.tool[aria-pressed="true"]{background:var(--accent-wash);color:var(--accent-ink)}

/* ─────────── stage ─────────── */
.stage{grid-area:stage;position:relative;overflow:hidden;touch-action:none;
  background:var(--wash);
  background-image:radial-gradient(circle at 1px 1px, rgba(15,18,22,.055) 1px, transparent 0);
  background-size:22px 22px}
.stage.dragover::after{content:"";position:absolute;inset:10px;border:2px dashed var(--accent);
  border-radius:var(--r-lg);background:rgba(58,70,240,.05);pointer-events:none;z-index:15}
.board{position:absolute;left:0;top:0;transform-origin:0 0;will-change:transform;
  box-shadow:var(--sh-3);
  background-color:#fff;
  background-image:
    linear-gradient(45deg,var(--checker) 25%,transparent 25%),
    linear-gradient(-45deg,var(--checker) 25%,transparent 25%),
    linear-gradient(45deg,transparent 75%,var(--checker) 75%),
    linear-gradient(-45deg,transparent 75%,var(--checker) 75%);
  background-size:18px 18px;background-position:0 0,0 9px,9px -9px,-9px 0}
.board.solid{background-image:none;background-color:var(--solid,#fff)}
.board canvas{display:block}
.board.crisp canvas{image-rendering:pixelated}
.ring{position:absolute;border-radius:50%;pointer-events:none;z-index:12;transform:translate(-50%,-50%);
  border:1.5px solid rgba(255,255,255,.95);box-shadow:0 0 0 1.5px rgba(15,18,22,.65), inset 0 0 0 1px rgba(15,18,22,.2)}
.ring.restore{border-color:#fff;box-shadow:0 0 0 1.5px var(--accent), inset 0 0 0 1px rgba(58,70,240,.4)}

/* ─────────── welcome ─────────── */
.welcome{position:absolute;inset:0;display:grid;place-items:center;padding:24px;z-index:10}
.welcome-card{width:min(520px,100%);background:var(--paper);border:1px solid var(--line);
  border-radius:20px;box-shadow:var(--sh-2);padding:36px 34px 28px;text-align:center}
.welcome-art{position:relative;height:74px;margin:0 auto 22px;width:172px}
.welcome-art .chip{position:absolute;border-radius:12px;box-shadow:var(--sh-1)}
.chip-a{left:0;top:8px;width:64px;height:64px;background:linear-gradient(150deg,#8E96FF,#3A46F0);
  transform:rotate(-7deg)}
.chip-b{left:56px;top:0;width:64px;height:64px;background:linear-gradient(150deg,#FFD27A,#F2775B);
  transform:rotate(4deg)}
.chip-c{left:112px;top:10px;width:60px;height:60px;border-radius:12px;background:#fff;
  box-shadow:inset 0 0 0 1px var(--line-2);
  background-image:linear-gradient(45deg,var(--checker) 25%,transparent 25%),
    linear-gradient(-45deg,var(--checker) 25%,transparent 25%),
    linear-gradient(45deg,transparent 75%,var(--checker) 75%),
    linear-gradient(-45deg,transparent 75%,var(--checker) 75%);
  background-size:14px 14px;background-position:0 0,0 7px,7px -7px,-7px 0;transform:rotate(-3deg)}
.welcome h1{font-size:25px;font-weight:640;letter-spacing:-.032em;margin-bottom:10px}
.welcome p{font-size:14px;line-height:1.55;color:var(--ink-2);max-width:40ch;margin:0 auto}
.welcome-actions{margin-top:24px;display:grid;justify-items:center;gap:12px}
.or{font-size:12px;color:var(--muted)}
.privacy{margin-top:22px !important;padding-top:16px;border-top:1px solid var(--line);
  font-size:11.5px !important;color:var(--muted) !important}

/* ─────────── busy ─────────── */
.busy{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:25;
  display:flex;align-items:center;gap:10px;background:var(--paper);border:1px solid var(--line);
  border-radius:99px;padding:9px 16px;box-shadow:var(--sh-2);font-size:12.5px}
.spinner{width:14px;height:14px;border-radius:50%;border:2px solid var(--line-2);
  border-top-color:var(--accent);animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ─────────── inspector ─────────── */
.panel{grid-area:panel;background:var(--paper);border-left:1px solid var(--line);overflow:hidden;z-index:20}
.panel-scroll{height:100%;overflow-y:auto;padding:18px 18px 40px}
.panel-head{margin-bottom:20px}
.panel-head h2{font-size:15px;font-weight:620;letter-spacing:-.02em;margin-bottom:5px}
.panel-head p{font-size:12.5px;line-height:1.5;color:var(--muted)}
.eyebrow{font-family:var(--mono);font-size:9.5px;font-weight:500;letter-spacing:.15em;text-transform:uppercase;
  color:var(--muted);margin-bottom:11px}
.rule{border:0;border-top:1px solid var(--line);margin:20px 0}
.ctl{margin-bottom:17px}
.ctl.hidden{display:none}
.ctl label{display:flex;justify-content:space-between;align-items:baseline;font-size:12.5px;
  font-weight:500;margin-bottom:8px}
.ctl output{font-family:var(--mono);font-size:11px;color:var(--accent-ink);
  background:var(--accent-wash);padding:2px 6px;border-radius:5px}
.hint{font-size:11.5px;line-height:1.5;color:var(--muted);margin-top:8px}

input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:18px;background:none;display:block}
input[type=range]::-webkit-slider-runnable-track{height:4px;border-radius:99px;background:var(--line)}
input[type=range]::-moz-range-track{height:4px;border-radius:99px;background:var(--line)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:15px;height:15px;border-radius:50%;
  background:var(--paper);border:1.5px solid var(--accent);margin-top:-5.5px;box-shadow:var(--sh-1);
  transition:transform .1s}
input[type=range]::-moz-range-thumb{width:15px;height:15px;border-radius:50%;background:var(--paper);
  border:1.5px solid var(--accent);box-shadow:var(--sh-1)}
input[type=range]:active::-webkit-slider-thumb{transform:scale(1.15)}

.seg{display:flex;border:1px solid var(--line-2);border-radius:var(--r-md);overflow:hidden;background:var(--wash)}
.seg button{flex:1;padding:8px 4px;font-size:11.5px;font-weight:500;color:var(--muted);transition:.13s}
.seg button[aria-pressed="true"]{background:var(--paper);color:var(--ink);box-shadow:var(--sh-1);
  border-radius:calc(var(--r-md) - 2px);margin:2px}
.check{display:flex;align-items:center;gap:9px;font-size:12.5px;margin-bottom:10px;cursor:pointer}
.check input{accent-color:var(--accent);width:15px;height:15px;margin:0}

.swatches{display:flex;gap:8px;flex-wrap:wrap}
.sw{width:30px;height:30px;border-radius:9px;background:var(--c,#fff);position:relative;
  box-shadow:inset 0 0 0 1px var(--line-2);transition:transform .12s}
.sw:hover{transform:scale(1.07)}
.sw.is-on{box-shadow:inset 0 0 0 1px var(--line-2),0 0 0 2px var(--paper),0 0 0 4px var(--accent)}
.sw-checker{background-color:#fff;
  background-image:linear-gradient(45deg,var(--checker) 25%,transparent 25%),
    linear-gradient(-45deg,var(--checker) 25%,transparent 25%),
    linear-gradient(45deg,transparent 75%,var(--checker) 75%),
    linear-gradient(-45deg,transparent 75%,var(--checker) 75%);
  background-size:12px 12px;background-position:0 0,0 6px,6px -6px,-6px 0}
.sw-custom{display:grid;place-items:center;overflow:hidden;cursor:pointer;
  background:conic-gradient(from 90deg,#F2775B,#FFD27A,#69C08A,#4FA3F7,#8E96FF,#F2775B)}
.sw-custom input{opacity:0;width:100%;height:100%;cursor:pointer}

/* ─────────── toasts & tooltips ─────────── */
.toasts{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);z-index:60;
  display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}
.toast{background:var(--ink);color:#fff;font-size:12.5px;padding:9px 15px;border-radius:99px;
  box-shadow:var(--sh-2);animation:rise .2s ease-out;max-width:min(90vw,420px);text-align:center}
.toast.warn{background:var(--danger)}
@keyframes rise{from{opacity:0;transform:translateY(8px)}}
.tip{position:fixed;z-index:70;background:var(--ink);color:#fff;font-size:11px;padding:5px 9px;
  border-radius:7px;pointer-events:none;white-space:nowrap;box-shadow:var(--sh-2);opacity:0;
  transition:opacity .12s}
.tip.show{opacity:1}

/* ─────────── modal ─────────── */
.modal{position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:24px;
  background:rgba(15,18,22,.32);backdrop-filter:blur(3px);animation:fade .15s}
@keyframes fade{from{opacity:0}}
.modal-card{width:min(420px,100%);background:var(--paper);border-radius:var(--r-lg);box-shadow:var(--sh-3);
  padding:20px 22px 22px}
.modal-card header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.modal-card h2{font-size:15px;font-weight:620;letter-spacing:-.02em}
.keys{display:grid;gap:11px}
.keys div{display:flex;align-items:center;gap:5px;font-size:12.5px}
.keys span{margin-left:auto;color:var(--muted);text-align:right}

/* ─────────── responsive ─────────── */
@media (max-width:1000px){
  .doc b{max-width:20vw}
  .btn#openBtn .lbl{display:none}
}
@media (max-width:820px){
  :root{--rail:0px;--panel:0px;--top:52px}
  .app{grid-template-columns:1fr;grid-template-rows:var(--top) 1fr 68px;
    grid-template-areas:"top" "stage" "rail"}
  .only-narrow{display:grid}
  .rail{flex-direction:row;justify-content:flex-start;overflow-x:auto;overflow-y:hidden;
    border-right:0;border-top:1px solid var(--line);padding:8px 10px;gap:4px;
    scrollbar-width:none}
  .rail::-webkit-scrollbar{display:none}
  .rail hr{width:1px;height:34px;margin:0 6px;align-self:center;flex:none}
  .tool{flex:none;width:62px}
  .panel{position:fixed;left:0;right:0;bottom:0;top:auto;max-height:72dvh;z-index:50;
    border-left:0;border-top:1px solid var(--line);border-radius:18px 18px 0 0;box-shadow:var(--sh-3);
    transform:translateY(101%);transition:transform .22s cubic-bezier(.32,.72,0,1)}
  .panel.open{transform:none}
  .panel-scroll{padding:22px 18px 34px}
  .panel::before{content:"";position:absolute;left:50%;top:8px;width:36px;height:4px;border-radius:99px;
    background:var(--line-2);transform:translateX(-50%)}
  .doc{display:none !important}
  .zoom{display:none}
  #compareBtn span{display:none}
  .welcome-card{padding:28px 20px 22px}
  .welcome h1{font-size:21px}
  .toasts{bottom:88px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
}

/* [hidden] must win over layout display rules */
[hidden]{display:none !important}