:root{
  --bg:#f4efe6;
  --paper:#fffaf3;
  --ink:#111111;
  --muted:#77716a;
  --line:#c9c0b5;
  --accent:#ff5e56;
  --good:#dbe8cf;
  --bad:#ffd8d5;
  --shadow:0 18px 60px rgba(17,17,17,.08);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:var(--bg);color:var(--ink);font-family:Inter,Arial,sans-serif}
button,input{font:inherit}
button{cursor:pointer}
body{min-height:100svh}
.app-shell{
  min-height:100svh;
  display:grid;
  grid-template-rows:auto 1fr auto;
  overflow-y:auto;
}
.topbar,.footer{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:16px clamp(18px,3vw,44px);
  border-color:var(--line);
  z-index:5;
}
.topbar{border-bottom:1px solid var(--line)}
.footer{border-top:1px solid var(--line);font-size:12px;letter-spacing:.08em;text-transform:uppercase}
.brand-button{
  display:flex;align-items:center;gap:12px;background:transparent;border:0;padding:0;text-align:left;color:var(--ink)
}
.brand-mark{
  width:44px;height:44px;border-radius:12px;background:var(--ink);color:var(--bg);
  display:grid;place-items:center;font-weight:900;letter-spacing:-.08em;
}
.brand-copy{display:flex;flex-direction:column;gap:2px}
.brand-copy strong{font-size:14px;letter-spacing:.02em}
.brand-copy small{font-size:11px;color:var(--muted)}
.studio-stamp{font-size:12px;font-weight:800;letter-spacing:.08em}
.screen{
  min-height:0;
  padding:clamp(18px,3vw,42px);
  display:grid;
  place-items:center;
}
.panel{
  width:min(1500px,100%);
  height:min(74vh,780px);
  min-height:480px;
  border:1px solid var(--line);
  background:rgba(255,250,243,.66);
  border-radius:28px;
  box-shadow:var(--shadow);
  overflow-y:auto;overflow-x:hidden;
}
.hero{
  display:grid;
  grid-template-columns:1.05fr .95fr;
}
.hero-copy{
  padding:clamp(32px,6vw,88px);
  display:flex;flex-direction:column;justify-content:center;
  border-right:1px solid var(--line)
}
.eyebrow{font-size:12px;letter-spacing:.18em;text-transform:uppercase;font-weight:800;color:var(--accent)}
h1,h2,h3,p{margin-top:0}
.hero h1{
  font-size:clamp(64px,8vw,138px);
  line-height:.8;
  letter-spacing:-.08em;
  margin-bottom:30px;
}
.hero p{font-size:clamp(18px,2vw,28px);max-width:620px;line-height:1.25}
.hero-visual{
  position:relative;padding:clamp(28px,5vw,70px);
  display:flex;flex-direction:column;justify-content:center;gap:24px;
}
.swatches{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.swatch{aspect-ratio:1/1;border-radius:18px;border:1px solid rgba(0,0,0,.08)}
.hero-note{
  border:1px solid var(--line);border-radius:18px;padding:22px;
  display:grid;gap:8px;background:rgba(255,255,255,.35)
}
.hero-note strong{font-size:clamp(24px,3vw,48px);line-height:1}
.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.play-hint{font-size:13px;color:var(--muted);margin-top:14px;max-width:420px}
.btn{
  border:1px solid var(--ink);border-radius:999px;padding:15px 22px;
  background:var(--ink);color:white;font-weight:800;min-height:52px;
}
.btn.secondary{background:transparent;color:var(--ink)}
.btn.accent{background:var(--accent);border-color:var(--accent)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.mode-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;
  padding:clamp(24px,4vw,50px);
  height:100%;align-content:start;overflow-y:auto;
}
.mode-card{
  text-align:left;border:1px solid var(--line);background:rgba(255,255,255,.35);
  padding:26px;border-radius:22px;min-height:180px;transition:.2s transform,.2s background;
}
.mode-card:hover{transform:translateY(-3px);background:var(--paper)}
.mode-card strong{display:block;font-size:clamp(24px,3vw,44px);letter-spacing:-.04em}
.mode-card span{color:var(--muted);font-size:14px}
.game{
  display:grid;grid-template-rows:auto 1fr auto;height:100%;
}
.game-head,.game-foot{
  display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 28px;
}
.game-head{border-bottom:1px solid var(--line)}
.game-foot{border-top:1px solid var(--line)}
.round-meta{display:flex;gap:12px;align-items:center}
.pill{
  border:1px solid var(--line);border-radius:999px;padding:8px 12px;font-size:12px;font-weight:800;letter-spacing:.05em;text-transform:uppercase
}
.timer{font-size:28px;font-weight:900}
.game-main{
  padding:clamp(16px,3vw,40px);
  display:grid;place-items:center;align-content:center;gap:18px;text-align:center;
}
.game-title{font-size:clamp(28px,3.4vw,56px);letter-spacing:-.05em;margin-bottom:6px}
.game-subtitle{color:var(--muted);margin-bottom:0}
.color-grid{display:flex;flex-wrap:wrap;gap:clamp(10px,1.5vw,24px);width:100%;justify-content:center}
.color-grid .color-choice{flex:0 0 auto;width:clamp(70px,15vw,140px)}
.color-grid .contrast-choice{flex:0 0 auto;width:clamp(70px,15vw,140px)}
.color-choice{
  aspect-ratio:1/1;border-radius:24px;border:2px solid transparent;transition:.15s transform,.15s border-color;
  box-shadow:0 8px 20px rgba(0,0,0,.04)
}
.color-choice:hover{transform:translateY(-4px)}
.color-choice.selected{border-color:var(--ink);transform:scale(.97)}
.contrast-choice{
  aspect-ratio:1/1;border-radius:24px;border:2px solid transparent;transition:.15s transform,.15s border-color;
  box-shadow:0 8px 20px rgba(0,0,0,.04);display:grid;place-items:center;font-size:clamp(20px,3vw,32px);font-weight:900
}
.contrast-choice:hover{transform:translateY(-4px)}
.contrast-choice.selected{border-color:var(--ink);transform:scale(.97)}
.contrast-choice.correct-reveal{border-color:#2e5d32;box-shadow:0 0 0 3px rgba(46,93,50,.25)}
.color-choice.correct-reveal{border-color:#2e5d32;box-shadow:0 0 0 3px rgba(46,93,50,.25);position:relative}
.color-choice.correct-reveal::after{content:"✓";position:absolute;top:8px;right:8px;width:22px;height:22px;border-radius:50%;background:#2e5d32;color:#fff;font-size:14px;font-weight:900;display:grid;place-items:center}
.feedback{
  min-height:30px;font-size:clamp(16px,1.8vw,24px);font-weight:800
}
.progress{height:8px;background:#ddd5ca;border-radius:999px;overflow:hidden;flex:1;max-width:420px}
.progress span{display:block;height:100%;background:var(--accent);transition:.3s width}
.split-result{display:grid;grid-template-columns:1.1fr .9fr;height:100%}
.result-copy{padding:clamp(28px,5vw,72px);display:flex;flex-direction:column;justify-content:center;border-right:1px solid var(--line)}
.result-copy h2{font-size:clamp(48px,6vw,96px);line-height:.9;letter-spacing:-.07em}
.score-box{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:28px 0}
.stat{border:1px solid var(--line);border-radius:18px;padding:18px}
.stat strong{display:block;font-size:36px}
.share-preview{
  padding:clamp(28px,4vw,60px);display:flex;flex-direction:column;justify-content:center;gap:18px;background:var(--ink);color:var(--bg)
}
.share-preview-card{
  aspect-ratio:4/5;border-radius:24px;background:var(--accent);padding:34px;color:#111;
  display:flex;flex-direction:column;justify-content:space-between
}
.share-preview-card h3{font-size:clamp(34px,4vw,60px);line-height:.9;letter-spacing:-.05em}
.share-preview-card .big-score{font-size:clamp(70px,8vw,140px);font-weight:900;letter-spacing:-.08em}
.other-games{
  padding:clamp(24px,4vw,52px);height:100%;display:grid;place-items:center;text-align:center
}
.other-games h2{font-size:clamp(44px,6vw,90px);line-height:.9;letter-spacing:-.06em}
.link-card{max-width:780px}
.footer-link{color:inherit}
.mini-palette{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;width:100%}
.mini-palette span{aspect-ratio:1;border-radius:8px;border:1px solid rgba(0,0,0,.08)}
.palette-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;width:min(560px,100%)}
.revision-palette-choice{padding:16px}
.revision-palette-choice.selected{border-color:var(--ink);background:var(--paper)}
.revision-palette-choice.correct-reveal{border-color:#2e5d32;background:var(--good)}
.color-name-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;width:min(600px,100%)}
.color-name-choice{min-height:auto;text-align:center;display:flex;align-items:center;justify-content:center}
.color-name-choice strong{font-size:clamp(15px,1.6vw,20px);letter-spacing:-.01em}
.color-name-choice.selected{border-color:var(--ink);background:var(--paper)}
.color-name-choice.correct-reveal{border-color:#2e5d32;background:var(--good)}
.slider-wrap{width:min(700px,100%);display:grid;gap:18px;text-align:left}
.slider-row{display:grid;grid-template-columns:110px 1fr 70px;gap:14px;align-items:center}
input[type="range"]{width:100%}
.art-chips{display:flex;gap:16px;justify-content:center;align-items:flex-start}
.art-chip-wrap{display:flex;flex-direction:column;align-items:center;gap:6px}
.chip-label{font-size:11px;font-weight:800;letter-spacing:.05em;text-transform:uppercase;color:var(--muted)}
.art-chip{
  width:min(140px,26vw);aspect-ratio:1;border-radius:24px;border:1px solid rgba(0,0,0,.1)
}
.match-meter{width:min(700px,100%);height:10px;border-radius:999px;background:#ddd5ca;overflow:hidden}
.match-meter span{display:block;height:100%;width:0%;background:var(--bad);transition:.2s width,.2s background}
@media (max-aspect-ratio: 4/3){
  .panel{height:auto;min-height:0}
  .hero,.split-result{grid-template-columns:1fr}
  .hero-copy,.result-copy{border-right:0;border-bottom:1px solid var(--line)}
}
@media (max-width: 760px){
  .topbar{padding:12px 14px}
  .studio-stamp{display:none}
  .brand-copy small{display:none}
  .screen{padding:12px}
  .panel{border-radius:20px;width:100%;min-height:calc(100svh - 132px)}
  .hero{display:flex;flex-direction:column}
  .hero-copy{padding:30px 24px}
  .hero h1{font-size:64px}
  .hero-visual{padding:24px}
  .mode-grid{grid-template-columns:1fr;padding:18px}
  .mode-card{min-height:130px}
  .game-head,.game-foot{padding:14px}
  .game-main{padding:16px 14px;gap:16px}
  .game-title{font-size:clamp(24px,6vw,40px);margin-bottom:2px}
  .game-subtitle{font-size:13px}
  .slider-row{grid-template-columns:80px 1fr 44px;font-size:12px}
  .art-chips{gap:14px}
  .art-chip{width:clamp(80px,26vw,120px)!important}
  .chip-label{font-size:10px}
  .slider-wrap{gap:8px}
  .match-meter{height:8px}
  .feedback{min-height:0;font-size:clamp(15px,3.6vw,20px);line-height:1.25}
  .score-box{grid-template-columns:1fr 1fr}
  .footer{padding:10px 14px;font-size:10px}
  .share-preview-card{aspect-ratio:auto;min-height:420px}
}
@media (max-width: 400px){
  .game-main{gap:10px}
  .art-chip{width:72px!important}
  .game-title{font-size:22px}
  .game-subtitle{font-size:12px}
}