@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{color-scheme:dark;font-family:'DM Sans',system-ui,sans-serif;color:#eff5ff;background:#0b1220;font-synthesis:none;--blue:#55baff;--muted:#98abc4;--line:#28374d}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 75% 0%,#152c48 0%,transparent 52%),#0b1220;min-height:100vh}button,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:1px solid var(--line);border-radius:10px;background:#172338;color:inherit;padding:12px 16px;font-size:14px;font-weight:600}button:hover{background:#233754;border-color:#4c6b92}button:disabled{cursor:default;opacity:.4}button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid #70c6ff;outline-offset:3px}a{color:inherit;text-decoration:none}a:hover{color:var(--blue)}.site-header{max-width:1280px;margin:auto;padding:24px 40px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #243047}.brand{display:flex;align-items:center;gap:8px;font:800 25px 'Manrope',sans-serif;letter-spacing:-1px}.brand span span{color:var(--blue)}nav{display:flex;align-items:center;gap:26px;font-size:14px;color:#b8c9df}.quiet{background:transparent}.primary{background:#67c3ff;border-color:#67c3ff;color:#08172b}.primary:hover{background:#9bd8ff;color:#08172b}main{max-width:1130px;margin:36px auto 0;padding:0 32px;display:grid;grid-template-columns:minmax(0,600px) minmax(250px,320px);gap:64px;justify-content:center}.game-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.eyebrow{font-size:12px;letter-spacing:2px;font-weight:600;color:#8fa4c1}h1{font:700 30px 'Manrope',sans-serif;margin:5px 0 0;letter-spacing:-.7px}.time-controls{display:flex;align-items:center;gap:14px}#timer{font-size:20px;font-variant-numeric:tabular-nums;color:#bbcee7}.board-wrap{position:relative;border-radius:10px;overflow:hidden;border:3px solid #182b45;box-shadow:0 16px 55px #0004}#board{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));background:#becbdc;gap:1px}.cell{font-family:'DM Sans',sans-serif;aspect-ratio:1;min-width:0;border:0;border-radius:0;padding:0;color:#2472c6;background:#f5f8fc;font-size:clamp(20px,2.9vw,33px);font-weight:500;position:relative;display:flex;align-items:center;justify-content:center}.cell:hover{background:#d6e9fc;border:0}.cell.given{color:#172b43;font-weight:700}.cell.peer{background:#e7eef7}.cell.same{background:#d0e6fa}.cell.selected{background:#b8dcfa;box-shadow:inset 0 0 0 3px #388bcf;z-index:1}.cell.conflict{color:#b4273e;background:#ffe4e9}.cell.box-right{border-right:2px solid #344c69}.cell.box-bottom{border-bottom:2px solid #344c69}.cell:focus-visible{outline:0;box-shadow:inset 0 0 0 3px #166ac0;z-index:2}.pencil{display:grid;grid-template-columns:repeat(3,1fr);width:90%;height:88%;font-size:clamp(10px,1.1vw,13px);color:#456486;line-height:1}.pencil span{display:flex;align-items:center;justify-content:center}.board-bottom{display:flex;justify-content:space-between;margin-top:15px;gap:14px;font-size:12px;color:var(--muted);line-height:1.5}#progress{white-space:nowrap;color:#b7c9df}.controls{padding-top:8px}.puzzle-picker{display:grid;grid-template-columns:1fr 1fr;gap:10px}.puzzle-picker label{grid-column:1/-1;color:#c4d2e4;font-size:14px}.puzzle-picker select{width:100%;padding:12px;color:#eff5ff;background:#121e30;border:1px solid var(--line);border-radius:10px;font-size:14px}.puzzle-picker button{display:flex;justify-content:space-between;gap:10px}.entry-panel{border:1px solid #304057;border-radius:16px;padding:22px;margin-top:24px;background:#121d2eab}.panel-heading{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-bottom:20px}.panel-heading h2{font-size:16px;margin:0;font-weight:600}.panel-heading>span{font-size:12px;color:#9bb2ce}.numberpad{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.numberpad button{font-size:26px;padding:10px;min-height:57px;background:#1e3049;border-color:#314866;font-weight:500}.numberpad button small{font-size:10px;color:#a4b9d4;margin-left:6px}.tools{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;margin-top:20px}.tools button{border:0;background:transparent;padding:7px 2px;font-size:12px;color:#bfd0e5}.tool-icon{display:block;font-size:25px;line-height:1.5;color:#deecff}.tools button[aria-pressed=true]{color:#73c8ff;background:#254665}.tools kbd{font:10px inherit;color:#95abc8}.check{width:100%;margin-top:18px;background:transparent;color:#badfff;border-color:#385775}#status{font-size:14px;line-height:1.6;min-height:44px;margin:18px 0 0;color:#9fb5d0}.small-note{display:flex;gap:12px;margin:20px 4px;color:#98adc9;font-size:14px;line-height:1.7}.small-note p{margin:0}.spark{color:#59baff}.camera-space{display:none}footer{max-width:1066px;margin:30px auto 0;padding:20px 0 26px;border-top:1px solid #263247;display:flex;justify-content:space-between;font-size:12px;color:#7e94b1}footer span{font-weight:700}#paused{position:absolute;inset:0;background:#111e30;z-index:3;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px}#paused[hidden]{display:none}#paused h2{font:600 30px 'Manrope';margin:0}dialog{max-width:min(430px,90vw);border:1px solid #3c5572;border-radius:18px;background:#132138;color:#f0f6ff;padding:28px;box-shadow:0 20px 100px #0008}dialog::backdrop{background:#020814b8;backdrop-filter:blur(5px)}dialog h2{margin-top:0;font-family:'Manrope';font-size:24px}dialog p{color:#b6c8df;line-height:1.7}.dialog-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:24px}body.streaming main{grid-template-columns:minmax(0,650px) 320px;gap:54px}body.streaming .entry-panel{padding:14px}body.streaming .numberpad{grid-template-columns:repeat(9,1fr);gap:3px}body.streaming .numberpad button{font-size:17px;padding:8px 0;min-height:38px}body.streaming .numberpad small{display:none}body.streaming .panel-heading,body.streaming .small-note{display:none}body.streaming .camera-space{display:flex;aspect-ratio:16/9;border:1px dashed #42607e;border-radius:14px;margin-top:24px;align-items:center;justify-content:center;flex-direction:column;color:#5d789b;background:#0d1829}body.streaming .camera-space span{font-size:10px;letter-spacing:3px}body.streaming .camera-space p{font-size:14px}body.streaming footer{display:none}
@media(min-width:1500px){main{margin-top:48px}}@media(max-width:900px){main,body.streaming main{gap:24px;padding:0 24px;grid-template-columns:minmax(0,1fr) 260px}.entry-panel{padding:15px}.board-bottom{flex-direction:column;gap:4px}.tools{gap:0}footer{margin:25px 24px 0}.site-header{padding:20px 24px}.cell{font-size:25px}}
@media(max-width:680px){.site-header{padding:14px 16px}.brand{font-size:22px}.brand img{width:36px;height:36px}nav{gap:10px}nav>a{display:none}main,body.streaming main{display:flex;flex-direction:column;padding:0 14px;margin-top:22px;gap:22px}.game-top{margin-bottom:15px}h1{font-size:26px}.cell{font-size:clamp(22px,6vw,34px)}.pencil{font-size:12px}.board-bottom{flex-direction:row;font-size:11px}.board-bottom>span:last-child{display:none}.controls{padding:0}.puzzle-picker{grid-template-columns:1fr 1fr;align-items:center}.puzzle-picker label{display:none}.entry-panel{margin-top:16px}.panel-heading{display:none}.numberpad{grid-template-columns:repeat(9,1fr);gap:4px}.numberpad button{font-size:23px;padding:9px 0;min-height:48px}.numberpad small{display:none}.tools{margin-top:12px}.tools button{font-size:14px}.tool-icon{font-size:23px}.check{margin-top:10px}#status{min-height:0;margin-top:12px}.small-note{display:none}footer{margin:24px 14px 0}.camera-space{display:none!important}}
.tools button{font-size:14px}.tools kbd{font-size:12px}
@media(min-width:901px){main{grid-template-columns:minmax(0,min(600px,calc(100svh - 280px))) 320px}body.streaming main{margin-top:24px;grid-template-columns:minmax(0,min(650px,calc(100svh - 250px))) 320px}}

/* Calm background, readable board, and a single warm action accent. */
:root{--blue:#66dec6;--muted:#afbfce;--line:#34495d;background:#101c2b}
body{background:radial-gradient(ellipse at 75% 0%,#193f46 0%,transparent 60%),#101c2b}
.primary{background:#f4bc63;border-color:#f4bc63;color:#202535}.primary:hover{background:#ffd493;color:#202535}
.cell{background:#fffaf0;color:#086955}.cell.given{color:#203044}.cell.peer{background:#edf0e7}.cell.same{background:#c5e9dc}.cell.selected{background:#a8ddcd;box-shadow:inset 0 0 0 3px #12725f}.cell:hover{background:#d8eee4}.cell.selected:hover{background:#a8ddcd}.cell.conflict{background:#ffe1df;color:#a32135}.cell.conflict:after{content:'!';position:absolute;right:3px;top:2px;font-size:12px;font-weight:800}.cell:focus-visible{box-shadow:inset 0 0 0 3px #12725f}
.pencil{color:#395d54}.tools button[aria-pressed=true]{background:#244e49;color:#9cf0dc}.check{color:#a5ebdc;border-color:#47796d}.spark{color:#79dec5}#status{color:#bdced9}.numberpad button small{color:#c1d2df}button:focus-visible,a:focus-visible,select:focus-visible{outline-color:#f4bc63}
.difficulty-help{font-size:13px;color:#bdced9;line-height:1.6;margin:12px 0 0;min-height:42px}
#difficulty-title{display:flex;align-items:center;gap:12px}#difficulty-title:before{content:'';width:10px;height:10px;border-radius:50%;background:#73dfbe}body[data-difficulty=medium] #difficulty-title:before{background:#f4bc63}body[data-difficulty=hard] #difficulty-title:before{background:#c4adff}
.entry-panel{margin-top:14px}body.streaming .difficulty-help{min-height:0;font-size:12px}
@media(max-width:680px){.puzzle-picker label{display:block}.difficulty-help{min-height:0}}

.mode-picker{margin-bottom:18px}.mode-picker label{display:block;color:#c4d2e4;font-size:14px;margin-bottom:8px}.mode-picker select{width:100%;padding:12px;color:#eff5ff;background:#121e30;border:1px solid var(--line);border-radius:10px;font:inherit;font-size:14px}.mode-picker p{font-size:13px;line-height:1.5;color:#bdced9;margin:10px 0 0}.running-low{color:#f4bc63!important;font-weight:700}body[data-mode=zen] .time-controls{gap:0}
body.streaming .mode-picker{margin-bottom:12px}body.streaming .mode-picker p{font-size:12px}body.streaming .tools{margin-top:8px}body.streaming .camera-space{margin-top:14px}
@media(min-width:901px){.mode-picker{display:grid;grid-template-columns:auto 1fr;align-items:center;gap:8px}.mode-picker label{margin:0}.mode-picker p{grid-column:1/-1;margin:0}.controls{padding-top:0}.entry-panel{padding:16px}.panel-heading{margin-bottom:12px}.tools{margin-top:12px}.small-note{margin-top:12px}.difficulty-help{min-height:0}}

body[data-difficulty=expert] #difficulty-title:before{background:#ffb879}body[data-difficulty=master] #difficulty-title:before{background:#f2a6d0}.puzzle-picker select:disabled{opacity:1;color:#d8e4ef;border-style:dashed;cursor:default}

.puzzle-progress{margin-top:12px}.progress-heading{display:flex;align-items:center;justify-content:space-between;font-size:12px;margin-bottom:7px}.progress-heading strong{font-size:14px;color:#85e7ce;font-variant-numeric:tabular-nums}#progress-bar{display:block;width:100%;height:8px;appearance:none;border:0;border-radius:8px;overflow:hidden;background:#283c4b;color:#66dec6}#progress-bar::-webkit-progress-bar{background:#283c4b;border-radius:8px}#progress-bar::-webkit-progress-value{background:#66dec6;border-radius:8px}#progress-bar::-moz-progress-bar{background:#66dec6;border-radius:8px}.board-bottom{margin-top:9px}@media(min-width:901px){main{grid-template-columns:minmax(0,min(600px,calc(100svh - 315px))) 320px}body.streaming main{grid-template-columns:minmax(0,min(650px,calc(100svh - 285px))) 320px}}

#game-controls[hidden]{display:none!important}body.controls-collapsed main{grid-template-columns:minmax(0,min(760px,calc(100svh - 315px)));justify-content:center}body.controls-collapsed.streaming main{grid-template-columns:minmax(0,min(800px,calc(100svh - 285px)))}#toggle-controls{white-space:nowrap}@media(max-width:680px){.site-header{flex-wrap:wrap;gap:12px}.site-header nav{margin-left:auto;gap:8px}.site-header nav button{font-size:12px;padding:10px 12px}body.controls-collapsed main{display:flex}.controls-collapsed .game{width:100%}}

select[hidden]{display:none!important}.inline-picker{position:relative;min-width:0}.inline-picker summary{list-style:none;padding:12px;border:1px solid var(--line);border-radius:10px;background:#121e30;color:#eff5ff;font-size:14px;cursor:pointer}.inline-picker summary::-webkit-details-marker{display:none}.inline-picker summary:focus-visible{outline:3px solid #f4bc63;outline-offset:3px}.inline-picker.locked summary{cursor:default;border-style:dashed}.picker-options{display:grid;gap:5px;padding:8px;margin-top:6px;border:1px solid #47796d;border-radius:10px;background:#142b35}.picker-options button{width:100%;text-align:left;display:block!important;padding:10px 12px}.picker-options button[aria-pressed=true]{background:#28574e;border-color:#66dec6;color:#b8f4e3}.mode-picker>.inline-picker{width:100%}.inline-picker[open]{z-index:4}.puzzle-picker{align-items:start}

/* Recording view uses the available capture height instead of a small fixed board. */
@media(min-width:901px){
 body.streaming{--record-board:min(1000px,calc(100svh - 260px),calc(100vw - 480px));background:#101e2c}
 body.streaming .site-header{max-width:1440px;padding:14px 28px;border-bottom:0}
 body.streaming main{max-width:none;width:max-content;max-width:100%;margin:12px auto 0;padding:0 24px;grid-template-columns:var(--record-board) 360px;gap:40px;align-items:start}
 body.streaming .game{width:100%;min-width:0}
 body.streaming .game-top{height:64px;margin-bottom:12px}
 body.streaming h1{font-size:36px}
 body.streaming .eyebrow{font-size:15px;letter-spacing:2px;color:#bdced9}
 body.streaming #timer{font-size:28px;color:#eff5ff}
 body.streaming .board-wrap{border:3px solid #526474;border-radius:4px;box-shadow:none}
 body.streaming #board{gap:1px;background:#80918f}
 body.streaming .cell{font-size:clamp(28px,calc(var(--record-board) / 17),60px);font-weight:600}
 body.streaming .cell.given{font-weight:800}
 body.streaming .cell.box-right{border-right:3px solid #203044}
 body.streaming .cell.box-bottom{border-bottom:3px solid #203044}
 body.streaming .pencil{font-size:clamp(13px,calc(var(--record-board) / 44),23px);font-weight:600;color:#294d45}
 body.streaming .progress-heading{font-size:16px}
 body.streaming .progress-heading strong{font-size:20px}
 body.streaming #progress-bar{height:10px}
 body.streaming .board-bottom{font-size:13px;color:#afbfce}
 body.streaming .controls{padding-top:12px;max-height:calc(100svh - 112px);overflow-y:auto;padding-bottom:12px}
 body.streaming .mode-picker{display:block;margin-bottom:18px}
 body.streaming .mode-picker label{margin-bottom:8px}
 body.streaming .mode-picker label,body.streaming .puzzle-picker label{font-size:17px}
 body.streaming .inline-picker summary,body.streaming .puzzle-picker button{font-size:17px;padding:14px}
 body.streaming .entry-panel{padding:18px;margin-top:20px;background:#132538}
 body.streaming .numberpad{grid-template-columns:repeat(3,1fr);gap:8px}
 body.streaming .numberpad button{font-size:32px;min-height:60px;padding:8px}
 body.streaming .tools{margin-top:16px}
 body.streaming .tools button{font-size:15px}
 body.streaming .tool-icon{font-size:28px}
 body.streaming .check{font-size:17px}
 body.streaming #status{font-size:16px}
 body.streaming .difficulty-help{font-size:14px;line-height:1.5}
 body.streaming .camera-space{display:none}
 body.controls-collapsed.streaming main{grid-template-columns:var(--record-board)}
}
@media(min-width:901px) and (max-height:800px){
 body.streaming{--record-board:min(1000px,calc(100svh - 245px),calc(100vw - 420px))}
 body.streaming main{grid-template-columns:var(--record-board) 300px;gap:24px;margin-top:0}
 body.streaming .site-header{padding-top:8px;padding-bottom:8px}
 body.streaming .numberpad button{min-height:42px;font-size:25px}
 body.streaming .entry-panel{padding:12px;margin-top:10px}
 body.streaming .mode-picker{margin-bottom:10px}
 body.streaming .inline-picker summary,body.streaming .puzzle-picker button{padding:10px}
 body.streaming .tools{margin-top:8px}
 body.streaming #status{margin-top:10px;min-height:0}
}

/* Reuse the same action buttons so quick controls share all game state. */
.compact-tools[hidden]{display:none!important}
.compact-tools{display:flex;gap:6px;align-items:center}
.compact-tools button{display:flex;align-items:center;gap:6px;padding:9px 10px;font-size:13px;white-space:nowrap}
.compact-tools .tool-icon{display:none}
.compact-tools kbd{font:600 11px 'DM Sans',sans-serif;color:#b8cddd;border:1px solid #486071;border-radius:4px;padding:2px 4px}
.compact-tools button[aria-pressed=true]{background:#28574e;border-color:#66dec6;color:#b8f4e3}
.tools kbd{display:block;margin-top:3px;font-size:11px}
body.controls-collapsed .game-top{flex-wrap:wrap;gap:8px}
@media(min-width:901px){body.controls-collapsed:not(.streaming) .game-top{display:grid;grid-template-columns:1fr auto}.controls-collapsed:not(.streaming) .compact-tools{grid-row:2;grid-column:1/-1;justify-content:center}}
@media(max-width:1100px){body.controls-collapsed.streaming .game-top{height:auto;min-height:64px}.controls-collapsed .compact-tools{order:3;width:100%;justify-content:center}body.controls-collapsed.streaming{--record-board:min(1000px,calc(100svh - 290px),calc(100vw - 100px))}}
@media(max-width:680px){.compact-tools{order:3;width:100%;justify-content:center}.compact-tools button{flex:1;justify-content:center;padding:9px 6px}.compact-tools kbd{font-size:10px}}

/* Full-height capture: move navigation and game information beside the board. */
@media(min-width:1200px){
 body.streaming{--record-board:min(calc(100svh - 32px),calc(100vw - 760px));background:#101e2c}
 body.streaming .site-header{position:absolute;left:24px;top:24px;width:280px;padding:0;display:flex;flex-direction:column;align-items:flex-start;gap:24px;z-index:5}
 body.streaming .site-header nav{flex-wrap:wrap;gap:12px;font-size:16px}
 body.streaming .site-header nav>a{width:100%}
 body.streaming .site-header nav button{font-size:16px;padding:12px}
 body.streaming main,body.controls-collapsed.streaming main{display:grid;width:max-content;max-width:100%;padding:0 24px;margin:16px 0;grid-template-columns:auto 360px;gap:32px}
 body.controls-collapsed.streaming main{grid-template-columns:auto}
 body.streaming .game{display:grid;grid-template-columns:280px var(--record-board);grid-template-rows:1fr auto auto;column-gap:24px;align-items:start}
 body.streaming .board-wrap{grid-column:2;grid-row:1/4;width:var(--record-board);align-self:start}
 body.streaming .game-top,body.controls-collapsed.streaming .game-top{grid-column:1;grid-row:1;margin:250px 0 0;height:auto;min-height:0;display:flex;flex-direction:column;align-items:flex-start;gap:28px}
 body.streaming h1{font-size:44px}
 body.streaming .eyebrow{font-size:17px}
 body.streaming #timer{font-size:38px}
 body.streaming .compact-tools{width:100%;order:0;display:flex;flex-direction:column;align-items:stretch;gap:12px}
 body.streaming .compact-tools button{justify-content:space-between;font-size:22px;padding:14px 18px}
 body.streaming .compact-tools kbd{font-size:16px;padding:4px 7px}
 body.streaming .puzzle-progress{grid-column:1;grid-row:2;margin-top:28px}
 body.streaming .progress-heading{font-size:17px;flex-wrap:wrap;gap:8px}
 body.streaming .progress-heading strong{font-size:28px}
 body.streaming .board-bottom{grid-column:1;grid-row:3;margin:14px 0 0;font-size:15px}
 body.streaming .cell{font-size:clamp(36px,calc(var(--record-board) / 13.5),86px);font-weight:700}
 body.streaming .pencil{font-size:clamp(16px,calc(var(--record-board) / 38),30px)}
 body.streaming .controls{padding-top:16px;max-height:calc(100svh - 32px)}
}
@media(min-width:1200px) and (max-height:800px){
 body.streaming .site-header{gap:12px;top:16px}
 body.streaming .game-top,body.controls-collapsed.streaming .game-top{margin-top:220px;gap:16px}
 body.streaming .compact-tools{gap:8px}
 body.streaming .compact-tools button{font-size:18px;padding:9px 12px}
 body.streaming h1{font-size:34px}
 body.streaming #timer{font-size:28px}
}