@font-face{font-family:"Source Sans 3";src:url("fonts/SourceSans3-Variable.woff2") format("woff2");font-style:normal;font-weight:200 900;font-display:swap}
@font-face{font-family:"Source Serif 4";src:url("fonts/SourceSerif4-Variable.woff2") format("woff2");font-style:normal;font-weight:200 900;font-display:swap}
:root{--bg:#F2F4F3;--surface:#FFFFFF;--ink:#172522;--muted:#52635D;--jade:#176F65;--line:#344C44;--soft:#E8EFED;--peer:#F0F5F3;--evidence:#E4F1ED;--error:#A13E35;--board-size:min(calc(100vw - 20px - env(safe-area-inset-left) - env(safe-area-inset-right)),calc(100dvh - 266px - env(safe-area-inset-top) - env(safe-area-inset-bottom)),520px);font-family:"Source Sans 3",Arial,sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}
*{box-sizing:border-box}html,body{width:100%;min-height:100%;margin:0}body{height:100dvh;overflow:hidden;padding:max(5px,env(safe-area-inset-top)) max(10px,env(safe-area-inset-right)) max(5px,env(safe-area-inset-bottom)) max(10px,env(safe-area-inset-left));background:var(--bg);font-size:16px}button,input,summary{font:inherit}button{color:inherit}.icon-sprite{position:absolute;width:0;height:0;overflow:hidden}.skip-link{position:fixed;z-index:20;top:4px;left:4px;transform:translateY(-150%);padding:8px 12px;background:var(--surface);border:2px solid var(--jade);border-radius:6px;color:var(--ink)}.skip-link:focus{transform:none}
.site-header{width:var(--board-size);height:38px;margin:0 auto 2px;display:flex;align-items:center;justify-content:space-between}.site-header h1{margin:0;font:650 1.32rem/1 "Source Serif 4",serif;letter-spacing:-.02em}.site-header h1 span{display:block;margin-bottom:2px;font:700 .52rem/1 "Source Sans 3",sans-serif;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}.header-actions{display:flex;align-items:center;gap:5px}.icon-button,.close,.track-controls button{display:inline-grid;place-items:center;min-width:34px;height:34px;padding:0;border:1px solid transparent;border-radius:6px;background:transparent;color:var(--muted);cursor:pointer}.icon-button:hover,.close:hover,.track-controls button:hover{border-color:#B9C5C1;color:var(--ink)}.icon-button svg,.close svg,.track-controls svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.audio-button{grid-auto-flow:column;gap:4px;padding:0 7px}.audio-state{font-size:.72rem;font-weight:700}
main{display:grid;place-items:start center}.game-card{width:100%;display:grid;justify-items:center}.game-meta{width:var(--board-size);height:25px;display:flex;align-items:center;justify-content:space-between}.game-meta>strong{font-size:.86rem;font-weight:760;letter-spacing:.02em}.compact-stats{position:relative;color:var(--muted);font-size:.72rem}.compact-stats summary{list-style:none;cursor:pointer;padding:3px 0;border-bottom:1px solid transparent}.compact-stats summary::-webkit-details-marker{display:none}.compact-stats summary:hover{border-color:currentColor}.compact-stats>div{position:absolute;z-index:8;right:0;top:24px;min-width:138px;display:grid;gap:5px;padding:10px 12px;text-align:right;background:var(--surface);border:1px solid #AEBDB8;border-radius:7px;color:var(--muted)}#originDisplay{font-weight:750;color:var(--ink)}
.status-wrap{width:var(--board-size);height:29px;margin:0 0 3px;display:flex;align-items:center;gap:6px}.status{flex:1;min-width:0;padding:4px 1px;color:var(--muted);font-size:.73rem;line-height:21px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.status.idle{visibility:hidden}.status.error{color:var(--error);font-weight:650}.status-more{flex:0 0 auto;padding:3px 0;border:0;border-bottom:1px solid var(--jade);background:transparent;color:var(--jade);font-size:.72rem;font-weight:750;cursor:pointer}
.board{width:var(--board-size);height:var(--board-size);display:grid;grid-template-columns:repeat(9,1fr);grid-template-rows:repeat(9,1fr);gap:1px;padding:2px;background:var(--line);border:1px solid var(--line)}.cell{position:relative;display:grid;place-items:center;min-width:0;min-height:0;padding:0;border:0;border-radius:0;background:var(--surface);color:var(--jade);font-family:"Source Sans 3",Arial,sans-serif;font-size:clamp(1.35rem,4.8vw,1.7rem);font-weight:620;font-variant-numeric:tabular-nums;line-height:1;cursor:pointer}.cell:nth-child(3n+1):not(:nth-child(9n+1)){border-left:2px solid var(--line)}.cell:nth-child(n+28):nth-child(-n+36),.cell:nth-child(n+55):nth-child(-n+63){border-top:2px solid var(--line)}.cell.given{color:var(--ink);font-weight:780}.cell.peer{background:var(--peer)}.cell.match{background:#DDEBE7;color:var(--ink)}.cell.selected{background:#D3E8E2;box-shadow:inset 0 0 0 2px var(--jade)}.cell.evidence{background:var(--evidence);box-shadow:inset 0 0 0 2px var(--error)}.cell.wrong{color:var(--error);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px}.cell:focus-visible{z-index:4;outline:3px solid var(--jade);outline-offset:2px}.notes{position:absolute;inset:2px;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);color:#2C625B;font-size:clamp(.54rem,1.7vw,.72rem);font-weight:650;line-height:1;font-variant-numeric:tabular-nums}.notes i{display:grid;place-items:center;font-style:normal}
.number-pad{width:var(--board-size);display:grid;grid-template-columns:repeat(9,minmax(0,1fr));gap:3px;margin:5px auto 3px}.number-pad button{height:44px;min-width:0;padding:0;border:1px solid #A8B8B3;border-radius:6px;background:var(--surface);color:var(--ink);font-size:1.12rem;font-weight:690;font-variant-numeric:tabular-nums;cursor:pointer}.number-pad button:hover{border-color:var(--jade);color:var(--jade)}
.tool-row{width:var(--board-size);height:46px;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:3px}.tool{min-width:0;height:44px;padding:3px 1px;display:grid;place-items:center;align-content:center;gap:1px;border:1px solid transparent;border-radius:6px;background:transparent;color:var(--muted);font-size:.75rem;font-weight:650;cursor:pointer}.tool svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.tool span{display:block;white-space:nowrap}.tool b{font-size:.68rem;color:var(--jade)}.tool:hover{border-color:#B8C4C0;background:var(--surface);color:var(--ink)}.tool[aria-pressed="true"]{border-color:var(--jade);background:var(--soft);color:var(--jade)}.tool:disabled{opacity:.38;cursor:default}
.game-actions{height:38px;margin-top:2px;display:grid;place-items:start center}.new-puzzle,.secondary,.primary{height:36px;padding:0 16px;border-radius:7px;font-size:.78rem;font-weight:740;cursor:pointer}.new-puzzle,.secondary{border:1px solid #879A94;background:transparent;color:var(--ink)}.new-puzzle:hover,.secondary:hover{border-color:var(--jade);color:var(--jade)}.primary{border:1px solid var(--jade);background:var(--jade);color:#fff}.primary:hover{background:#105E56}button:focus-visible,summary:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid var(--jade);outline-offset:2px}
dialog{max-width:calc(100vw - 16px);max-height:calc(100dvh - 16px);padding:0;border:0;border-radius:8px;background:transparent;color:var(--ink)}dialog::backdrop{background:rgba(23,37,34,.42)}.dialog-card{width:min(420px,calc(100vw - 16px));max-height:calc(100dvh - 16px);overflow-y:auto;padding:20px;background:var(--surface);border:1px solid var(--line);border-radius:8px}.dialog-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:13px}.dialog-head h2,.completion h2{margin:0;font:720 1.3rem/1.1 "Source Sans 3",Arial,sans-serif}.close{flex:0 0 auto;margin:-5px -5px 0 0}.switch-row{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:10px 0;border-top:1px solid #D6DEDB}.switch-row strong{display:block;font-size:.86rem}.switch-row small{display:block;margin-top:1px;color:var(--muted);font-size:.72rem}.switch-row input{width:20px;height:20px;accent-color:var(--jade)}.music-settings{padding-top:12px;border-top:1px solid #D6DEDB;font-size:.84rem}.music-settings>input{width:100%;accent-color:var(--jade)}.track-controls{display:grid;grid-template-columns:34px 1fr 34px;align-items:center;gap:5px;margin-top:4px}.track-controls span{text-align:center;color:var(--muted);font-size:.76rem}.preference-action{width:100%;margin-top:13px}.credits-link{margin:12px 0 0;text-align:center;font-size:.7rem}.credits-link a{color:var(--muted)}
.difficulty-list{display:grid;gap:6px}.difficulty-list button,.daily-choice{width:100%;padding:9px 11px;text-align:left;border:1px solid #B3C0BC;border-radius:7px;background:var(--surface);cursor:pointer}.difficulty-list button{display:flex;align-items:baseline;justify-content:space-between;gap:12px}.difficulty-list strong{font-size:.9rem}.difficulty-list span{color:var(--muted);font-size:.72rem;text-align:right}.difficulty-list button:hover,.daily-choice:hover{border-color:var(--jade);color:var(--jade)}.daily-choice{margin-top:10px;text-align:center;color:var(--muted);font-size:.78rem}.generation-panel{margin-top:10px;padding:14px;border:1px solid #B3C0BC;border-radius:7px;text-align:center;background:var(--bg)}.generation-panel h3{margin:7px 0 3px;font:720 1.05rem "Source Sans 3",Arial,sans-serif}.generation-panel p{min-height:2.2em;margin:0;color:var(--muted);font-size:.76rem}.generation-actions{display:flex;gap:7px;justify-content:center;flex-wrap:wrap;margin-top:10px}.spinner{width:24px;height:24px;margin:auto;border:3px solid #BED3CD;border-top-color:var(--jade);border-radius:50%;animation:spin .8s linear infinite}.generation-panel.failed .spinner{display:none}.difficulty-list.generating,.daily-choice.generating{display:none}@keyframes spin{to{transform:rotate(360deg)}}
.completion{text-align:center}.seal{width:40px;height:40px;margin:0 auto 12px;display:grid;place-items:center;border:1px solid var(--jade);border-radius:7px;color:var(--jade);font-weight:800}.completion #completeStats{color:var(--muted);font-size:.82rem}.completion button{display:block;width:100%;margin-top:8px}.status-dialog p{margin:8px 0 0;color:var(--ink);font-size:.9rem;line-height:1.5}
@media(max-height:680px){:root{--board-size:min(calc(100vw - 20px - env(safe-area-inset-left) - env(safe-area-inset-right)),calc(100dvh - 253px - env(safe-area-inset-top) - env(safe-area-inset-bottom)),500px)}.site-header{height:34px;margin-bottom:1px}.site-header h1{font-size:1.16rem}.icon-button{height:31px;min-width:31px}.game-meta{height:22px}.status-wrap{height:26px;margin-bottom:2px}.status{line-height:18px}.number-pad{margin-top:4px}.number-pad button{height:42px}.tool-row{height:44px}.tool{height:42px}.game-actions{height:36px;margin-top:0}.new-puzzle{height:34px}}
@media(max-width:420px){body{padding-left:max(10px,env(safe-area-inset-left));padding-right:max(10px,env(safe-area-inset-right))}.site-header{padding:0}.game-meta>strong{font-size:.82rem}.cell{font-size:1.5rem}.compact-stats>div{right:0}.dialog-card{padding:17px}.difficulty-list button{padding:8px 10px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.spinner{animation:none;border-color:var(--jade)}}