:root{
  --ink:#3b3446;--muted:#7d7486;--rose:#b15d79;--rose-deep:#8f3f5c;--paper:#fffaf6;--cream:#f6ece6;--line:#e6d3da;
  --felt:#2f7a4f;--felt-dark:#1f5a39;--felt-line:#1a4a2f;--gold:#c99a4a;--ok:#2d7a52;--bad:#b0453f;
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%}
html{background:#ead6cf}
body{background:radial-gradient(1200px 600px at 20% -10%,#fdf3ee 0,#f2e3dc 55%,#ead6cf 100%) fixed;color:var(--ink);
  font-family:"Yu Gothic","YuGothic","Hiragino Sans","Meiryo",sans-serif;line-height:1.7}
button,input,select{font:inherit;color:inherit}
button,.button{display:inline-flex;align-items:center;justify-content:center;gap:6px;cursor:pointer;border:1px solid var(--line);
  border-radius:12px;background:var(--paper);color:var(--ink);padding:11px 18px;min-height:46px;text-decoration:none;transition:background .15s,transform .12s,box-shadow .15s}
button:hover:not(:disabled),.button:hover{background:#fbe9ef;transform:translateY(-1px)}
button:focus-visible,.button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #a94a71;outline-offset:2px}
button:disabled{opacity:.5;cursor:default}
button.primary,.button.primary{background:linear-gradient(#c06a87,var(--rose-deep));color:#fff;border-color:transparent;box-shadow:0 6px 16px #8f3f5c33}
button.primary:hover:not(:disabled){background:linear-gradient(#c8738f,#94435f)}
button.subtle{background:transparent;min-height:38px;padding:6px 12px;font-size:14px}
input,select{padding:11px 12px;border:1px solid #d5b3c1;border-radius:10px;background:#fff;width:100%}
input[type=range]{padding:0;accent-color:var(--rose)}
label{display:block;margin:14px 0 6px;font-size:14px;color:var(--muted)}
h1,h2,h3{font-weight:600;line-height:1.35;margin:0 0 10px}
h2{color:var(--rose-deep);font-size:22px}
h3{font-size:16px;margin-top:18px}
p{margin:0 0 10px}
.muted,.help{color:var(--muted)}
.help{font-size:13px}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px clamp(14px,3vw,30px);
  background:#fffaf6cc;backdrop-filter:blur(8px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.brand{color:var(--rose-deep);font-weight:700;letter-spacing:.08em;text-decoration:none;font-size:17px;white-space:nowrap}
.brand span{font-weight:400;color:var(--muted);font-size:13px;margin-left:6px;letter-spacing:.04em}
.topbar nav{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.topbar nav button{min-height:38px;padding:6px 12px;font-size:14px}
main{max-width:1280px;margin:0 auto;padding:clamp(14px,2.5vw,28px)}
.loading{text-align:center;padding:80px 0;color:var(--muted)}
footer{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;padding:18px 16px 26px;font-size:13px;color:var(--muted)}
footer a{color:var(--muted)}
footer details{max-width:820px}
footer summary{cursor:pointer}
#notice{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);z-index:50;max-width:min(92vw,560px);display:none;
  background:#3b3446ee;color:#fff;padding:12px 18px;border-radius:12px;box-shadow:0 10px 30px #0004;text-align:center}
dialog{border:none;border-radius:18px;padding:26px clamp(18px,3vw,30px);max-width:min(94vw,640px);width:100%;background:var(--paper);color:var(--ink);box-shadow:0 30px 80px #0005}
dialog::backdrop{background:#2a222f99}
.close{position:absolute;right:10px;top:10px;min-height:36px;width:36px;padding:0;border-radius:50%;font-size:18px}
.code{font-family:Consolas,monospace;word-break:break-all;background:#fff;border:1px dashed var(--rose);padding:12px;border-radius:10px;user-select:all}
table{border-collapse:collapse;width:100%;font-size:14px}th,td{padding:7px 6px;border-bottom:1px solid var(--line);text-align:left}
.table-wrap{max-height:55vh;overflow:auto}
.tag{font-size:12px;color:var(--rose)}
.grid-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.grid-list div{border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:#fff;font-size:13px;color:var(--muted)}
.grid-list .earned{border-color:var(--rose);color:var(--ink)}
.grid-list strong{display:block;color:var(--rose-deep)}

/* top page */
.hero{display:grid;grid-template-columns:1.35fr 1fr;gap:clamp(18px,3vw,36px);align-items:center}
.hero-art{border-radius:24px;overflow:hidden;box-shadow:0 20px 50px #8f3f5c2e;aspect-ratio:16/9;background:url(/assets/title-cast.png) center/cover}
.hero-copy .eyebrow{color:var(--rose);letter-spacing:.2em;font-size:13px;margin-bottom:4px}
.hero-copy h1{font-size:clamp(30px,4.4vw,52px);letter-spacing:.04em;color:var(--rose-deep)}
.panel{background:#fffaf6e6;border:1px solid var(--line);border-radius:20px;padding:clamp(18px,3vw,28px)}
.hero-copy form{margin-top:14px}
.connection{font-size:13px;color:var(--rose)}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}
.features div{background:#fffaf6cc;border:1px solid var(--line);border-radius:14px;padding:14px;font-size:14px}
.features strong{display:block;color:var(--rose-deep)}
.sales{margin:26px auto 0;text-align:center;max-width:720px}
.sales p{font-size:13px;color:var(--muted);margin-top:10px}

/* waiting / offer */
.waiting{text-align:center;max-width:640px;margin:20px auto;padding:clamp(22px,4vw,40px)}
.waiting h1{color:var(--rose-deep)}
.orbit{width:72px;height:72px;margin:10px auto 12px;position:relative;border-radius:50%;border:2px dashed #d9bcc8}
.orbit i{position:absolute;width:24px;height:24px;border-radius:50%;left:22px;top:-12px;animation:orbit 2.4s linear infinite;transform-origin:12px 46px}
.orbit i:nth-child(1){background:radial-gradient(circle at 35% 30%,#666,#111)}
.orbit i:nth-child(2){background:radial-gradient(circle at 35% 30%,#fff,#d8d2cc);animation-delay:-1.2s;box-shadow:0 0 0 1px #0002}
@keyframes orbit{to{transform:rotate(360deg)}}
.match-timer{font-size:28px;font-weight:700;color:var(--rose-deep)}
.offer-host{width:120px;height:120px;border-radius:50%;object-fit:cover;object-position:top;border:3px solid #fff;box-shadow:0 8px 20px #0002;margin:0 auto 10px;display:block;background:#fff}

/* match */
.match{display:grid;grid-template-columns:minmax(200px,260px) minmax(0,1fr) minmax(220px,280px);gap:clamp(12px,2vw,24px);align-items:start}
.host{position:sticky;top:76px}
.host-card{background:#fffaf6ee;border:1px solid var(--line);border-radius:18px;overflow:hidden}
.host-portrait{height:280px;background:linear-gradient(#f9eee9,#efdcd3);display:flex;align-items:flex-end;justify-content:center;overflow:hidden}
.host-portrait img{max-width:100%;max-height:100%;object-fit:contain;object-position:bottom;transition:opacity .2s}
.host-body{padding:12px 14px}
.host-name{font-size:13px;color:var(--rose)}
.host-line{font-size:15px;min-height:4.2em}
.board-wrap{display:flex;flex-direction:column;align-items:center;gap:10px}
.board-frame{width:min(100%,640px,calc(100vh - 230px));min-width:280px;padding:clamp(10px,1.6vw,18px);border-radius:18px;
  background:linear-gradient(145deg,#6b4a2f,#4a3220);box-shadow:0 18px 40px #3b221333,inset 0 2px 0 #ffffff22}
.board{display:grid;grid-template-columns:repeat(8,1fr);aspect-ratio:1;background:var(--felt);border:2px solid var(--felt-line);position:relative}
.cell{position:relative;border:1px solid var(--felt-line);padding:0;min-height:0;border-radius:0;background:transparent;display:block}
.cell:hover:not(:disabled){background:transparent;transform:none}
.cell.legal{cursor:pointer}
.cell.legal::after{content:"";position:absolute;inset:36%;border-radius:50%;background:#ffffff55;box-shadow:0 0 0 2px #ffffff44}
.cell.legal:hover::after{background:#ffffffa0}
.cell.legal.preview::after{inset:12%;background:#ffffff40}
.board.hide-hints .cell.legal::after{display:none}
.board.hide-hints .cell.legal:hover::after{display:block}
.cell:disabled{opacity:1;cursor:default}
.stone{position:absolute;inset:9%;border-radius:50%;transition:transform .35s}
.stone.b{background:radial-gradient(circle at 35% 30%,#5b5b5b,#0d0d0d 70%);box-shadow:0 3px 4px #0007}
.stone.w{background:radial-gradient(circle at 35% 30%,#fff,#ddd6cf 75%);box-shadow:0 3px 4px #0005}
.stone.flip{animation:flip .45s ease}
.stone.new{animation:drop .25s ease}
@keyframes flip{0%{transform:rotateY(90deg) scale(.9)}100%{transform:rotateY(0)}}
@keyframes drop{0%{transform:scale(.4);opacity:.3}100%{transform:scale(1);opacity:1}}
.cell.last::before{content:"";position:absolute;z-index:2;width:18%;height:18%;left:41%;top:41%;border-radius:50%;background:#e2524f;box-shadow:0 0 0 2px #fff8}
.dot{position:absolute;width:9px;height:9px;border-radius:50%;background:var(--felt-line);transform:translate(-50%,-50%);z-index:1;pointer-events:none}
.coords{display:grid;grid-template-columns:repeat(8,1fr);color:#f3e7d6;font-size:12px;text-align:center;letter-spacing:.05em}
.coord-row{display:grid;grid-template-columns:18px 1fr;gap:4px}
.coord-side{display:grid;grid-template-rows:repeat(8,1fr);color:#f3e7d6;font-size:12px;align-items:center;text-align:center}
.event{min-height:1.7em;font-size:14px;color:var(--ink);text-align:center}
.side{display:flex;flex-direction:column;gap:12px}
.player{background:#fffaf6ee;border:1px solid var(--line);border-radius:16px;padding:12px 14px;display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center}
.player.turn{border-color:var(--rose);box-shadow:0 0 0 3px #b15d7926}
.player .chip{width:34px;height:34px;border-radius:50%}
.chip.b{background:radial-gradient(circle at 35% 30%,#5b5b5b,#0d0d0d 70%)}
.chip.w{background:radial-gradient(circle at 35% 30%,#fff,#ddd6cf 75%);box-shadow:0 0 0 1px #0002}
.player .name{font-weight:600;overflow-wrap:anywhere}
.player .meta{font-size:12px;color:var(--muted)}
.player .count{font-size:28px;font-weight:700;color:var(--rose-deep);min-width:2ch;text-align:right}
.turn-timer{font-size:13px;color:var(--rose-deep)}
.turn-timer.hurry{color:var(--bad);font-weight:700}
.controls{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.controls button{min-height:42px;font-size:14px;padding:8px}
.result{position:absolute;inset:0;z-index:4;display:grid;place-content:center;text-align:center;background:#1d281fcc;color:#fff;padding:20px;border-radius:2px}
.result h2{color:#ffe7a8;font-size:clamp(26px,4vw,40px);margin:0}
.result .score{font-size:20px;margin:6px 0}
.result .badges{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin:8px 0}
.result .badges span{background:#ffe7a822;border:1px solid #ffe7a866;border-radius:20px;padding:3px 10px;font-size:13px}
.result button:not(.primary){color:var(--ink)}
.disconnect{color:var(--bad);font-size:14px;text-align:center}
.rules{max-width:820px;margin:0 auto;padding:24px}

/* practice */
.picker{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}
.picker button{flex-direction:column;align-items:stretch;padding:10px;gap:6px;text-align:center;height:auto}
.picker img{width:100%;height:170px;object-fit:contain;object-position:bottom}
.picker small{color:var(--muted)}
.picker button.chosen{border-color:var(--rose);box-shadow:0 0 0 3px #b15d7933}
.pause{position:fixed;inset:0;z-index:60;display:grid;place-content:center;text-align:center;background:#2a222ff0;color:#fff;padding:24px}
.pause h2{color:#ffe7a8}
.waiting-note{background:#fff3c8;border:1px solid #e8cf7a;border-radius:12px;padding:10px 14px;font-size:14px;margin-bottom:12px}

@media (max-width:1020px){
  .match{grid-template-columns:minmax(0,1fr) minmax(200px,250px)}
  .host{grid-column:1/-1;position:static}
  .host-card{display:grid;grid-template-columns:110px 1fr}
  .host-portrait{height:120px}
  .host-line{min-height:0}
}
@media (max-width:760px){
  .hero{grid-template-columns:1fr}
  .features{grid-template-columns:1fr}
  .match{grid-template-columns:1fr}
  .board-frame{width:100%}
  .side{display:grid;grid-template-columns:1fr 1fr}
  .side .controls{grid-column:1/-1}
  .player{grid-template-columns:auto 1fr;padding:10px}
  .player .count{grid-column:1/-1;text-align:left;font-size:22px}
  .picker{grid-template-columns:repeat(2,1fr)}
  .picker img{height:120px}
  .topbar{flex-wrap:wrap}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}