:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,sans-serif;color-scheme:dark;--bg:#191b1b;--panel:#202322;--raised:#292d2a;--border:#414440;--text:#d6d5ce;--strong:#f0eee5;--muted:#92958c;--accent:#b9c7a2;--slot:#151817;--ink:#20271c;--tint:#b9c7a20b;--tilew:clamp(44px,5vw,66px)}
[data-theme=light]{color-scheme:light;--bg:#e6dac0;--panel:#ece1ca;--raised:#dacbad;--border:#bead8d;--text:#494336;--strong:#302d24;--muted:#766b58;--accent:#526144;--slot:#d7c8aa;--ink:#fffbed;--tint:#5261440b}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-size:13px;min-height:100svh;display:flex;flex-direction:column}body:has(dialog[open]){overflow:hidden}button,input{font:inherit}button{cursor:pointer;color:inherit;border:0;background:none}a{color:var(--accent)}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}button:disabled{cursor:default;opacity:.3}header{width:min(1240px,100%);margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:21px 30px;gap:20px} .brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-size:25px;font-weight:650;letter-spacing:-1.4px;color:var(--strong)}.brand-dot{color:var(--accent);margin-left:-9px}.brand-mark{font-family:serif;font-size:27px;color:var(--accent);font-weight:400;letter-spacing:0;margin-right:4px}.header-tools{display:flex;align-items:center;gap:24px}#terms{font-size:10px;letter-spacing:1px;color:var(--accent);padding:8px}#terms span{color:var(--muted)}.icon-btn{font-size:24px;width:30px;padding:0}.primary{background:var(--accent);color:var(--ink);border-radius:5px;padding:10px 17px;font-weight:600;font-size:12px}.primary span{margin-left:20px}main{width:min(1180px,100%);padding:0 30px;margin:auto;flex:1;display:flex;flex-direction:column;justify-content:center;gap:clamp(28px,5vh,62px)}h1,h2,h3,p{margin:0}h2{font-size:10px;font-weight:500;letter-spacing:1.3px;text-transform:uppercase;color:var(--muted)}h3{font-size:13px;font-weight:550}p{line-height:1.7;color:var(--muted)}.setup{display:grid;grid-template-columns:1fr 1.1fr;gap:64px;padding:20px 20px 0;align-items:start}.indicators{padding-top:3px}.indicator-pair{display:flex;flex-direction:column;gap:17px;margin-top:18px}.indicator-pair>div{display:flex;align-items:center;gap:22px}.label-row{width:84px;flex-shrink:0;font-size:11px;color:var(--muted)}.indicator-slots{display:flex;gap:9px}.slot{width:var(--tilew);aspect-ratio: .72;flex-shrink:0;border:1px dashed var(--border);border-radius:5px;background:var(--slot);display:grid;place-items:center;position:relative;padding:0;transition:background .15s,border-color .15s}.slot.empty{color:var(--muted);font-size:15px}.slot.selected{border:1px solid var(--accent);box-shadow:0 0 0 3px var(--tint);background:var(--raised)}.slot.filled.selected{outline:2px solid var(--accent);outline-offset:4px}.slot img,.key img{width:100%;height:100%;object-fit:contain;pointer-events:none}.slot.dragover{outline:2px solid var(--accent);outline-offset:3px}.indicator-slots .slot,.winds .slot{width:32px}.indicator-slots .slot:disabled{opacity:.22}.section-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.section-heading{display:flex;align-items:center;gap:13px}.help{border:1px solid var(--border);border-radius:50%;color:var(--muted);font-size:10px;width:20px;height:20px;display:inline-grid;place-items:center;padding:0;flex-shrink:0}.condition-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:22px;margin-top:16px}.condition-meta{display:flex;flex-direction:column;gap:15px}.segmented{display:flex;background:var(--slot);padding:3px;border-radius:5px}.segmented button{padding:7px 10px;font-size:10px;flex:1;border-radius:3px;white-space:nowrap}.segmented button.active{background:var(--raised);color:var(--accent)}.winds{display:flex;gap:26px}.winds>div{display:flex;gap:10px;align-items:center}.winds label{font-size:10px;color:var(--muted)}.flags{display:grid;grid-template-columns:1fr 1fr;gap:5px 10px}.flag{font-size:11px;padding:5px 0;color:var(--muted);display:flex;align-items:center;gap:8px;text-align:left;min-height:28px}.flag:before{content:'';width:11px;height:11px;flex-shrink:0;border:1px solid var(--border);border-radius:3px}.flag.active{color:var(--accent)}.flag.active:before{content:'✓';background:var(--accent);border-color:var(--accent);font-size:9px;color:var(--ink);display:grid;place-items:center}.hand-panel{padding:22px 20px 0;border-block:1px solid var(--border);background:linear-gradient(90deg,transparent,var(--tint),transparent)}h1{font-size:21px;font-weight:450;letter-spacing:-.7px;color:var(--strong)}.badge{font-family:ui-monospace,monospace;font-size:10px;color:var(--muted)}.tools{display:flex;gap:18px;align-items:center}.tools button{font-size:10px;color:var(--muted);padding:4px 0}.tools button:hover{color:var(--accent)}.hand-scroll{overflow-x:auto;padding:6px}.hand{display:flex;gap:9px;justify-content:center;padding:42px 0 30px;min-width:820px}.winner{margin-left:15px}.winner:after{content:'WIN';position:absolute;top:-22px;left:50%;transform:translateX(-50%);font-size:8px;letter-spacing:1.6px;color:var(--accent);white-space:nowrap}.hand-footer{display:flex;justify-content:space-between;align-items:center;min-height:42px;font-size:10px;color:var(--muted);gap:12px}#score-summary{color:var(--accent);font-size:12px;padding:9px 0;text-align:right}#score-summary span{margin-left:12px}.keyboard-panel{align-self:center;width:max-content;max-width:100%;padding-bottom:12px}.keyboard-heading{margin-bottom:18px;padding-left:0}.keyboard{display:grid;gap:8px}.tile-row{display:flex;align-items:center;justify-content:center;gap:8px;position:relative;min-height:52px}.suit-label{position:absolute;right:calc(100% + 14px);font-size:8px;color:var(--muted);white-space:nowrap}.key{width:39px;aspect-ratio:.72;padding:0;border-radius:5px;transition:transform .13s,opacity .13s}.key:hover{transform:translateY(-3px)}.key:disabled{transform:none;opacity:.2}.red-key{margin-left:5px}.key,.slot.filled{background:#f5f0df url('/assets/tiles/Front.svg') center/100% 100% no-repeat;box-shadow:0 2px 0 #8d9281,0 3px 5px #0003;overflow:visible;border:0}.key img,.slot.filled img{padding:4px}.indicator-slots .slot img,.winds .slot img{padding:2px}footer{margin:24px auto 0;padding:10px 20px 20px;font-size:9px;color:var(--muted);text-align:center}footer a{text-decoration:none}dialog{background:var(--panel);border:1px solid var(--border);border-radius:10px;color:var(--text);padding:24px;max-width:min(430px,calc(100vw - 32px));box-shadow:0 16px 70px #0005}dialog::backdrop{background:#0007}dialog p{font-size:12px;margin-top:16px}dialog .section-top h2{font-size:15px;letter-spacing:0;text-transform:none;color:var(--strong)}dialog .section-top button,.drawer-header button{font-size:17px;padding:5px 0 5px 16px;color:var(--muted)}form{display:flex;border:1px solid var(--border);border-radius:5px;overflow:hidden;background:var(--slot);margin-top:15px}input{min-width:0;width:100%;border:0;color:var(--text);background:transparent;padding:12px;font-family:ui-monospace,monospace;font-size:13px}form button{color:var(--accent);padding:0 15px}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%) translateY(100px);opacity:0;transition:.2s;background:var(--accent);color:var(--ink);border-radius:6px;padding:12px 18px;font-size:12px;z-index:10;max-width:90vw;box-shadow:0 5px 30px #0005}#toast.show{transform:translateX(-50%);opacity:1}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
#score-drawer{position:fixed;inset:0 0 0 auto;width:min(540px,100%);max-width:100%;height:100%;max-height:100%;margin:0;border:0;border-left:1px solid var(--border);border-radius:0;padding:0;overflow:hidden}#score-drawer[open]{display:flex;flex-direction:column;animation:slide-in .25s ease-out}#score-drawer.closing{animation:slide-out .18s ease-in forwards}@keyframes slide-in{from{transform:translateX(100%)}to{transform:translateX(0)}}@keyframes slide-out{to{transform:translateX(100%)}}.drawer-header{display:flex;align-items:center;justify-content:space-between;padding:24px 28px;border-bottom:1px solid var(--border);flex-shrink:0}.drawer-header h2{font-size:16px;letter-spacing:-.3px;text-transform:none;color:var(--strong)}.drawer-content{overflow-y:auto;padding:26px 28px;display:flex;flex-direction:column;gap:30px;flex:1}.score-number{font-size:46px;font-weight:400;letter-spacing:-2px;color:var(--strong);line-height:1.1}.score-number small{font-size:12px;letter-spacing:0;color:var(--muted);margin-left:8px}.score-meta{margin-top:8px;color:var(--accent);font-size:12px}.result-message{padding:15px 0;color:var(--muted);font-size:13px;line-height:1.7}.algorithm{list-style:none;counter-reset:step;padding:0;margin:28px 0 0;display:grid;gap:24px}.algorithm>li{counter-increment:step;position:relative;padding-left:31px}.algorithm>li:before{content:counter(step,decimal-leading-zero);position:absolute;left:0;top:2px;font-size:9px;font-family:ui-monospace,monospace;color:var(--accent)}.algorithm h3{margin-bottom:10px}.score-row{display:flex;justify-content:space-between;gap:15px;padding:6px 0;font-size:11px;color:var(--muted)}.score-row strong{color:var(--text);font-weight:500;white-space:nowrap}.score-row.total{border-top:1px solid var(--border);margin-top:5px;padding-top:10px;color:var(--accent)}.score-row.total strong{color:var(--accent)}.fine{font-size:10px;line-height:1.7;color:var(--muted);margin-top:9px}.formula{font-family:ui-monospace,monospace;font-size:11px;background:var(--slot);padding:12px;border-radius:5px;line-height:1.8;overflow-wrap:anywhere}.mini-hand{display:flex;gap:9px;flex-wrap:wrap;margin:10px 0}.mini-set{display:flex;gap:2px}.mini-tile{width:21px;aspect-ratio:.72;background:#f5f0df url('/assets/tiles/Front.svg') center/100% 100% no-repeat;border-radius:3px}.mini-tile img{width:100%;height:100%;padding:2px}.reference{margin-top:auto;border-top:1px solid var(--border);padding-top:22px}.reference .segmented button{font-size:9px;padding:5px 8px}.table-scroll{overflow-x:auto;margin-top:14px}table{border-collapse:collapse;width:100%;font-size:9px;font-variant-numeric:tabular-nums;text-align:center}th,td{padding:8px 4px;border:1px solid var(--border);white-space:nowrap}th{font-weight:500;color:var(--muted);background:var(--slot)}td{color:var(--text)}td.limit{background:var(--tint);color:var(--accent)}td.match{outline:2px solid var(--accent);outline-offset:-2px;background:var(--raised)}.table-limits{margin-top:14px}.rules{border-top:1px solid var(--border);padding-top:16px}.rules summary{font-size:10px;color:var(--muted);cursor:pointer}.rules p{font-size:10px}.group-caption{font-size:10px;color:var(--muted)}
@media(min-height:1000px){main{gap:60px}.hand{padding:55px 0 42px}.key{width:44px}.tile-row{gap:9px}}
@media(max-width:1000px){:root{--tilew:48px}.setup{gap:26px;padding-inline:0;grid-template-columns:1fr 1fr}.condition-grid{gap:14px}.condition-meta .segmented{flex-direction:column}.winds{gap:14px}.winds>div{flex-direction:column;gap:6px}.flags{grid-template-columns:1fr;gap:0}.indicator-pair{margin-top:22px;gap:24px}.indicator-pair>div{flex-direction:column;align-items:start;gap:9px}.label-row{width:auto}.hand{min-width:800px}.hand-panel{padding-inline:6px}.suit-label{display:none}}
@media(max-width:650px){header{padding:18px 18px}.header-tools{gap:12px}.primary{padding:9px 12px}.primary span{margin-left:10px}main{padding:0 16px;gap:28px}.setup{gap:18px;grid-template-columns:.85fr 1.15fr;padding-top:12px}.condition-grid{grid-template-columns:1fr;gap:14px}.condition-meta{gap:12px}.condition-meta .segmented{flex-direction:row}.winds{gap:22px}.winds>div{flex-direction:row}.flags{grid-template-columns:1fr 1fr;gap:3px 9px}.flag{font-size:9px;gap:5px;min-height:27px}.flag:before{width:10px;height:10px}.indicator-slots{gap:4px;flex-wrap:wrap}.indicator-slots .slot{width:25px}.indicator-pair{gap:18px}.hand{gap:7px;justify-content:flex-start;min-width:800px;padding-top:35px}.hand-scroll{margin-inline:-6px}h1{font-size:19px}.tools{gap:12px}.tools button{font-size:9px}.hand-panel{padding-top:17px}.badge{font-size:9px}.section-heading{gap:8px}#score-summary{font-size:10px;max-width:65%}.key{width:calc((100vw - 94px)/10);max-width:39px}.tile-row{gap:5px;min-height:0}.red-key{margin-left:0}.keyboard{gap:9px}.keyboard-heading{margin-bottom:16px}.drawer-content{padding:24px 20px}.drawer-header{padding:20px}.hand-footer{font-size:9px}footer{margin-top:20px;font-size:8px}.slot.winner:after{font-size:8px}.score-number{font-size:40px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}}
.key,.slot.filled{touch-action:none;user-select:none;-webkit-user-select:none}.drag-ghost{position:fixed;width:48px;aspect-ratio:.72;transform:translate(-50%,-75%) rotate(-5deg);pointer-events:none;z-index:100;background:#f5f0df url('/assets/tiles/Front.svg') center/100% 100% no-repeat;border-radius:5px;box-shadow:0 8px 22px #0005}.drag-ghost img{width:100%;height:100%;padding:4px;pointer-events:none}
/* Set controls, kan stacks, and native mathematical typesetting. */
.hand-footer{justify-content:flex-end}.winner:after{display:none}.winner{margin-left:15px}.section-heading .badge{font-size:12px;color:var(--text)}
.hand{align-items:flex-start;gap:8px;padding-top:45px;padding-bottom:38px;width:max-content;min-width:100%}.meld{position:relative;flex-shrink:0;padding-inline:3px}.meld-tiles{display:flex;gap:4px;position:relative}.meld-controls{position:absolute;top:calc(100% + 12px);left:50%;transform:translateX(-50%);display:flex;justify-content:center;align-items:center;gap:14px}.called-control{font-size:9px;color:var(--muted);display:flex;align-items:center;gap:5px;white-space:nowrap;cursor:pointer}.called-control input{appearance:auto;accent-color:var(--accent);width:11px;height:11px;margin:0;padding:0}.called-control:has(input:checked){color:var(--accent)}.kan .meld-tiles{padding-top:13px}.kan-fourth{position:absolute;top:0;left:50%;transform:translate(-50%,-55%) rotate(90deg);transform-origin:center;z-index:1}.kan .slot:not(.kan-fourth){margin-top:-13px}.kan-fourth.selected{outline-offset:3px}.meld.called .meld-tiles:after{content:'';position:absolute;inset:auto 0 -6px;border-bottom:1px solid var(--accent);opacity:.5;pointer-events:none}.required-indicator{border:1px solid #c49758!important;box-shadow:0 0 0 3px #c497581c;background:#c4975812}.indicator-notice{font-size:10px;color:var(--accent);margin-top:13px}#score-summary small{font-size:10px;color:var(--muted);margin-left:5px}.math-formula{font-family:math,'STIX Two Math','Cambria Math',serif;font-size:17px;padding:18px 14px;display:grid;gap:14px;overflow-x:auto}.math-formula math{margin:0;white-space:nowrap;text-align:left;math-style:normal}.math-formula mtext{font-family:ui-sans-serif,system-ui,sans-serif;font-size:11px}.math-formula mn{font-variant-numeric:tabular-nums}.math-formula mo{padding-inline:2px}#typing-buffer{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);font:14px ui-monospace,monospace;padding:8px 15px;background:var(--panel);border:1px solid var(--border);border-radius:5px;color:var(--accent);z-index:2}#typing-buffer[hidden],#typing-buffer:empty{display:none}#hand{cursor:text}#hand .slot{cursor:pointer}.hand-panel .section-top{min-height:28px}
@media(max-width:650px){.hand{min-width:100%;padding-top:40px}.meld-tiles{gap:3px}.called-control{font-size:8px}.math-formula{font-size:15px;padding:14px 10px}#score-summary small{font-size:9px;display:block;margin-top:4px}}
/* Emphasize the result without changing the surrounding hand layout. */
#score-summary.has-score{font-size:17px;line-height:1.4;font-variant-numeric:tabular-nums}#score-summary .score-total{font-size:21px;font-weight:550;color:var(--strong)}#score-summary.has-score small{font-size:13px}.required-indicator{outline:1px solid #c49758;outline-offset:2px;border:1px solid #c49758!important;box-shadow:0 0 0 4px #c4975820;background:#c497581c;color:var(--strong)}.fu-reference{border-top:1px solid var(--border);padding-top:22px}.fu-table th:first-child{text-align:left}.fu-table th,.fu-table td{white-space:normal;line-height:1.5;padding:8px 7px}.fu-table td:last-child{max-width:160px}.fu-reference>.fine{margin-top:14px}
@media(max-width:650px){#score-summary.has-score{font-size:15px;max-width:100%}#score-summary .score-total{font-size:18px}#score-summary.has-score small{font-size:12px;display:inline;margin-left:4px}.hand-footer{min-height:48px}}
/* The numeric guide shares the tile grid; honors keep the same left edge. */
.keyboard{--key-width:39px;--key-gap:8px}.keyboard .key{width:var(--key-width)}.keyboard .tile-row{gap:var(--key-gap)}.tile-row[data-suit=z]{justify-content:flex-start}.suit-label{font-size:10px}.keyboard-index{display:flex;gap:var(--key-gap);color:var(--muted);font-size:10px;text-align:center;margin-top:3px}.keyboard-index>span{width:var(--key-width);flex-shrink:0}.keyboard-index>span:last-child{margin-left:5px}.drawer-tools{display:flex;align-items:center;gap:18px}#score-terms{font-size:10px;letter-spacing:1px;color:var(--accent);padding:6px}#score-terms span{color:var(--muted)}.guide-dialog{width:480px;max-width:calc(100vw - 32px);max-height:calc(100svh - 48px);overflow-y:auto}.guide-steps{padding-left:20px;margin:18px 0 0;display:grid;gap:14px;color:var(--muted);font-size:12px;line-height:1.7}.guide-steps strong{color:var(--text);font-weight:550}.guide-dialog code{color:var(--accent);font-size:11px;background:var(--slot);padding:2px 4px;border-radius:3px}.guide-dialog kbd{display:inline-block;min-width:18px;padding:1px 4px;border:1px solid var(--border);border-radius:3px;font:10px ui-monospace,monospace;color:var(--accent);text-align:center}.notation-legend{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:16px;font-size:11px;color:var(--muted)}.notation-legend kbd{margin-right:5px}.guide-dialog h3{margin-top:20px}.shortcut-table{margin-top:10px;text-align:left}.shortcut-table th,.shortcut-table td{padding:7px 8px;font-size:11px;white-space:normal}.shortcut-table th{width:82px}.shortcut-table .subtle{font-size:9px;color:var(--muted)}.table-limits th{white-space:normal}.guide-dialog .fine{font-size:10px}.guide-dialog p{margin-top:14px}
@media(min-height:1000px){.keyboard{--key-width:44px;--key-gap:9px}}
@media(max-width:650px){.keyboard{--key-width:calc((100vw - 94px)/10);--key-gap:5px}.keyboard .key{max-width:39px}.keyboard-index>span{max-width:39px}.keyboard-index>span:last-child{margin-left:0}.keyboard-index{font-size:10px}}
.language-control{display:flex;align-items:center;gap:0;white-space:nowrap;font-size:10px;letter-spacing:.4px}.language-control button{font:inherit;letter-spacing:inherit;color:var(--muted);padding:6px 3px}.language-control button+button:before{content:'/';margin-right:6px;color:var(--muted);opacity:.5}.language-control button[aria-pressed=true]{color:var(--accent)}#terms,#score-terms{padding:0}.drawer-header .language-control button{font-size:10px;padding:6px 3px}html[lang=ja] body{font-family:ui-sans-serif,system-ui,'Noto Sans JP',sans-serif}html[lang=ja] .flag{font-size:11px}html[lang=ja] .suit-label{letter-spacing:1px}html[lang=ja] .label-row{font-size:11px}html[lang=ja] .guide-steps{line-height:1.85}