:root{--ink:#14241c;--paper:#f3f0e7;--card:#fffdf7;--lime:#caff42;--wood:#d4a45e;--muted:#68766f}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,"Noto Sans JP",sans-serif}.app{max-width:1180px;margin:auto;padding:20px}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.brand{font-size:18px;font-weight:800;letter-spacing:.1em;color:inherit;text-decoration:none}.tag{background:var(--ink);color:white;padding:7px 12px;border-radius:99px;font-size:11px}.screen{display:none}.screen.on{display:block}.lobby{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}.hero,.card{border-radius:24px;padding:28px;background:var(--card);box-shadow:0 18px 55px #263a2e18}.hero{background:var(--ink);color:white;min-height:490px;display:flex;flex-direction:column;justify-content:center}.hero h1{font-size:clamp(45px,7vw,80px);line-height:.95;letter-spacing:-.07em;margin:18px 0}.hero p{color:#dce4df;line-height:1.8}.accent{color:var(--lime);font-size:12px;font-weight:800;letter-spacing:.13em}.darkText{color:var(--muted)}.side{display:grid;gap:14px}.card h2{font-size:18px;margin-top:0}label{display:grid;gap:6px;margin:12px 0}input{padding:14px;border:1px solid #d3ccbd;border-radius:11px;font:inherit;width:100%}.btns,.tabs,.boardtools{display:flex;gap:8px;flex-wrap:wrap}button{border:0;border-radius:11px;padding:13px 17px;font:inherit;font-weight:700;cursor:pointer;background:#e8e4da;color:var(--ink)}button.primary,.tabs button[aria-pressed="true"]{background:var(--lime)}button.dark{background:var(--ink);color:white}button:disabled{opacity:.4}.tabs button{flex:1}.rating{font-size:44px;font-weight:800}.prob{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:15px 0}.prob span{background:#eeeadf;padding:10px;border-radius:10px}.prob b{display:block}.status{font-size:13px;color:var(--muted);line-height:1.6;min-height:25px}.game{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:16px}.boardbox{background:var(--wood);border-radius:18px;padding:12px}.boardtools{margin-bottom:9px}.boardtools button{padding:8px 12px}.boardtools span{align-self:center}.scroll{overflow:auto;max-height:calc(100vh - 160px);border-radius:8px}canvas{display:block;background:var(--wood);touch-action:none}.panel{display:grid;gap:12px;align-content:start}.players{display:grid;gap:8px;margin-top:12px}.player{padding:11px;border-radius:12px;background:#eee9dd;display:flex;justify-content:space-between}.player.turn{outline:3px solid var(--lime)}.piece{display:grid;grid-template-columns:repeat(4,24px);grid-template-rows:repeat(4,24px);justify-content:center;margin:16px}.piece i{border-radius:50%;margin:2px}.b{background:#18201c}.w{background:white;border:1px solid #aaa}.empty{visibility:hidden}.timer{font-size:30px;font-weight:800;margin-top:8px}.centerText{text-align:center;font-weight:700}.waiting{text-align:center;padding:70px 20px}.spin{width:42px;height:42px;border:5px solid #ddd;border-top-color:var(--ink);border-radius:50%;animation:s 1s linear infinite;margin:20px auto}@keyframes s{to{transform:rotate(360deg)}}.result{font-size:28px;font-weight:800;margin-bottom:15px}.notice{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(100px);background:var(--ink);color:white;padding:11px 16px;border-radius:10px;transition:.2s;z-index:5}.notice.on{transform:translateX(-50%)}footer{max-width:1180px;margin:25px auto;padding:24px 20px;border-top:1px solid #d8d2c5;color:var(--muted)}footer nav{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:15px}a{color:#315d49}@media(max-width:780px){.lobby,.game{grid-template-columns:1fr}.hero{min-height:380px}.panel{grid-template-columns:1fr 1fr}.scroll{max-height:58vh}}@media(max-width:500px){.panel{grid-template-columns:1fr}.app{padding:12px}.prob{grid-template-columns:1fr}.brand{font-size:15px}}