:root{color-scheme:light;--ink:#073e7c;--blue:#0088f3;--line:#b9dbeb;--cream:#fffaf0;font-family:"Noto Sans JP",system-ui,sans-serif;color:var(--ink);background:#fbfaf5}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 10% 0,#e2f6ff,transparent 65%),#fffdf7}button,input{font:inherit}button{color:var(--ink);background:#fff;border:1px solid #9accea;border-radius:16px;padding:12px 17px;min-height:46px;cursor:pointer;font-weight:700}button:hover:not(:disabled){background:#eaf7ff}button:disabled{opacity:.48;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #a65a00;outline-offset:3px}button.primary{background:linear-gradient(#009eff,#0075e9);box-shadow:inset 0 2px 2px #86eaff;color:#fff;border-color:#008afa}button.quiet{background:transparent;border-color:transparent}h1,h2,h3,p{margin-top:0}h2{font-size:1.45rem}rt{font-size:.52em}main{max-width:1000px;margin:auto;padding:18px 24px 30px}.draft{font-size:.75rem;color:#5b7390;margin:0 0 12px}.hero{text-align:center;padding:12px 16px 24px}.eyebrow{font-size:.85rem;font-weight:700;letter-spacing:.04em}.hero h1{font-size:clamp(2.3rem,6vw,3.7rem);letter-spacing:.02em;margin:5px 0}.hero h1 span{color:#0088ed;font-size:1.4em;display:inline-block;transform:rotate(-6deg);text-shadow:3px 3px #bdeaff}.lead{font-size:1.25rem;font-weight:800;margin-bottom:8px}.example{display:flex;align-items:center;justify-content:center;gap:12px;margin:24px auto 0}.example i{font-style:normal;background:white;border:2px solid #83cbe9;border-radius:15px;box-shadow:0 5px #c4e8f2;width:54px;padding:6px;font-size:1.8rem;font-weight:800}.example strong{font-size:2rem;color:#087e96}.modes{display:grid;grid-template-columns:1fr 1fr;gap:20px}.modes article{background:white;border:1px solid var(--line);border-radius:24px;padding:25px;box-shadow:0 5px 16px #184c6a09}.modes h2{margin:16px 0 10px}.modes p{line-height:1.8}.modes .primary{width:100%}.tag{display:inline-block;border-radius:20px;background:#e4f7f3;color:#116d68;padding:6px 12px;font-size:.8rem;font-weight:750}.sunny{background:#fff1ba;color:#835500}.small{font-size:.83rem;line-height:1.7;color:#4a627d}.consent{display:flex;gap:9px;align-items:flex-start;font-size:.9rem;font-weight:700;margin:10px 0}.consent input{min-width:20px;height:20px;margin-top:1px;accent-color:var(--blue)}.rules{background:#f0f8fc;border:1px solid var(--line);padding:17px 20px;border-radius:18px;margin:20px 0;line-height:1.8}.rules summary{cursor:pointer;font-weight:750}.rules p{margin:12px 0}.screen[hidden],[hidden]{display:none!important}#play{max-width:540px;margin:auto}.play-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:6px;margin-bottom:10px}.play-head h2{font-size:1rem;margin:0}.play-head .small{width:100%;text-align:right;margin-top:-8px;font-size:.72rem}.hud{display:flex;align-items:center;justify-content:space-between;margin:8px 0 14px;padding:10px 18px;background:#fff;border:1px solid var(--line);border-radius:20px}.hud small{display:block;font-size:.8rem}.hud strong{font-size:2rem;margin-right:5px;font-variant-numeric:tabular-nums}.hud #clock-box{text-align:right}.hud #clock-box.urgent{color:#a74e07}.board-wrap{position:relative;max-width:440px;margin:auto;background:#ddecf2;padding:7px;border-radius:22px;box-shadow:0 7px 0 #c0dbe7,0 12px 30px #186e9710}.board{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:7px;touch-action:none;user-select:none;-webkit-user-select:none}.tile{padding:0;min-height:0;aspect-ratio:1;border:2px solid #bbddea;border-radius:14px;font-size:clamp(1.4rem,5.5vw,2rem);position:relative;z-index:1;box-shadow:0 3px 0 #adcddd;color:#10466a;user-select:none}.tile[aria-pressed=true]{border:3px solid #007ad7;background:#fff1ba;color:#05386c;box-shadow:0 3px #4c9ac3}.tile::after{content:attr(data-order);position:absolute;top:1px;left:4px;font-size:.65rem;line-height:1.1}.tile.hint{outline:3px dashed #af6700;outline-offset:-6px}.tile.fall{animation:fall .18s ease-out}.board-wrap.clearing .tile[aria-pressed=true]{animation:pop .18s ease-out}.board-wrap.shuffling .tile{animation:shuffle .6s ease-in-out}#route{position:absolute;inset:7px;width:calc(100% - 14px);height:calc(100% - 14px);pointer-events:none;z-index:2}#route polyline{fill:none;stroke:#087fd3;stroke-width:5;stroke-linecap:round;stroke-linejoin:round;opacity:.6}#overlay{position:absolute;inset:0;display:grid;place-items:center;z-index:3;border-radius:22px;background:#edfaffdd;font-size:3.5rem;font-weight:850;white-space:pre-line;text-align:center}#overlay.shuffle{font-size:1.2rem}.sum{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:17px 0 10px;min-height:38px}#formula{font-size:.92rem;max-width:65%;overflow-wrap:anywhere}.sum strong{white-space:nowrap;font-size:1.15rem}.sum small{font-weight:400}.sum.ready{color:#007b6c}#input-guide{margin:8px 0}#message{font-size:.9rem;min-height:2.8em;line-height:1.4;margin:12px 0 0}.practice-tools{display:flex;justify-content:space-between;gap:8px}.practice-tools button{font-size:.85rem}.result,.ranking{max-width:650px;background:#fff;border:1px solid var(--line);border-radius:26px;padding:30px;margin:15px auto}.result{text-align:center}.big-score{margin:20px 0}.big-score strong{font-size:4.2rem;color:#007be5;letter-spacing:-.04em}.big-score span{margin-left:8px}.result-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.result-stats div{background:#edf8fc;border-radius:15px;padding:13px 6px}.result-stats dt{font-size:.75rem}.result-stats dd{font-size:1.3rem;font-weight:800;margin:6px 0}.result-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:20px}.ranking ol{list-style:none;padding:0}.ranking li{display:grid;grid-template-columns:3em 1fr auto;gap:10px;padding:13px 8px;border-bottom:1px solid #dce9f1;overflow-wrap:anywhere}.ranking li strong{white-space:nowrap}#my-rank{padding:15px;background:#eafaef;border-radius:15px}#my-rank:empty{display:none}footer{display:flex;justify-content:center;gap:25px;padding:25px;font-size:.8rem}a{color:#0069cc}#global-note{margin:15px auto;max-width:650px}.celebrate{animation:pop .5s ease-out}@keyframes pop{50%{transform:scale(1.04)}}@keyframes fall{from{transform:translateY(-12px);opacity:.7}to{transform:none;opacity:1}}@keyframes shuffle{50%{transform:scale(.93)}}@media(max-width:600px){main{padding:12px}.hero{padding:4px 0 20px}.modes{grid-template-columns:1fr;gap:14px}.modes article{padding:20px}.hero p{font-size:.92rem}.example{gap:8px}.example i{width:48px}.result,.ranking{padding:22px 15px}.play-head{margin-bottom:5px}.hud{margin:5px 0 12px;padding:8px 15px}.hud strong{font-size:1.6rem}.board-wrap{border-radius:17px;padding:6px}.board{gap:5px}.tile{border-radius:11px}#route{inset:6px;width:calc(100% - 12px);height:calc(100% - 12px)}.result-stats{grid-template-columns:1fr}.result-stats div{display:flex;justify-content:space-between;align-items:center;padding:10px 15px}.result-stats dd{margin:0}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}