:root{--ink:#0b1020;--paper:#edf2ff;--accent:#7cbcff;--muted:#a0adc9;--line:#2c3857;--mono:"Courier New",monospace}*{box-sizing:border-box}body{margin:0;background:var(--ink);color:var(--paper);font-family:Arial,Helvetica,sans-serif;height:100vh;height:100svh;overflow:hidden;display:flex;flex-direction:column;padding-bottom:env(safe-area-inset-bottom)}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer;touch-action:manipulation}button:disabled{opacity:.3;cursor:default}button:focus-visible,a:focus-visible,canvas:focus-visible{outline:2px solid var(--accent);outline-offset:3px}p,h1{margin:0}header{height:54px;min-height:54px;border-bottom:1px solid var(--line);padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{display:flex;align-items:center;gap:8px;font-size:11px}.brand>b{background:var(--accent);color:var(--ink);height:27px;width:27px;display:grid;place-items:center;font-size:21px;letter-spacing:-3px;padding-right:3px}header>strong{font-size:12px;letter-spacing:1.6px}.back{font:9px var(--mono);color:var(--muted)}.back:hover{color:var(--accent)}main{flex:1;min-height:0;display:flex;flex-direction:column;width:min(100% - 30px,760px);margin:auto}.hud{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;height:55px;min-height:55px;max-width:560px;margin:auto}.hud>div>span{display:block;font:8px var(--mono);letter-spacing:.6px;color:var(--muted);text-transform:uppercase;margin-bottom:4px}.hud>div>b{font:17px var(--mono);font-weight:700}.icon-button{display:grid;place-items:center;width:32px;height:32px;background:transparent;border:1px solid var(--line);font-size:18px;padding:0;flex:0 0 auto}.icon-button:hover{border-color:var(--accent);color:var(--accent)}.play-area{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;gap:20px}.board-wrap{position:relative;width:250px;height:500px;max-width:100%;max-height:100%;border:1px solid #3b4c73;background:#141a30;overflow:hidden;isolation:isolate}.board-wrap>canvas{display:block;width:100%;height:100%;touch-action:none}.side-panel{width:86px;flex:0 0 86px;align-self:flex-start;padding-top:8px;font:10px var(--mono);color:#a6b4cf}.side-panel>span{font-size:8px;letter-spacing:.7px}.side-panel>canvas{width:86px;height:86px;display:block;margin:8px 0 12px;border:1px solid var(--line);background:#141a30}.side-panel>p{font:11px Arial,sans-serif;line-height:1.65}.side-panel .side-tip{font:8px var(--mono);color:#9aabd0;margin-top:20px}.side-panel #feedback{display:block;color:var(--accent);font-size:9px;line-height:1.7;margin-top:20px}.overlay{position:absolute;inset:0;display:grid;place-items:center;padding:17px;background:#0b1020ed;z-index:2}.overlay[hidden]{display:none}.overlay>section{text-align:center;width:min(100%,320px)}.eyebrow{font:7px var(--mono);letter-spacing:1px;color:var(--accent);margin-bottom:18px}.overlay h1{font-size:clamp(28px,5vw,43px);letter-spacing:-2px;line-height:1.05}.overlay h1>span{color:var(--accent)}#dialog-description{font-size:11px;line-height:1.7;color:#bcc8e3;margin-top:16px}#dialog-meta{font:8px var(--mono);color:#a1b1d4;margin-top:20px;line-height:1.6}.primary{display:block;width:100%;background:var(--accent);color:var(--ink);border:0;min-height:43px;margin-top:23px;font-size:12px;font-weight:700;padding:10px}.primary:hover{filter:brightness(1.15)}.tips{font:8px var(--mono);line-height:1.8;color:#afbedb;margin-top:16px}.overlay a{font:8px var(--mono);color:#b2c2e1;display:inline-block;padding:6px;margin-top:17px}.overlay a:hover{color:var(--paper)}.controls{height:58px;min-height:58px;display:flex;align-items:center;justify-content:center;gap:9px;max-width:560px;width:100%;margin:auto}.controls>button{height:35px;min-width:36px;border:1px solid #465880;background:#1a2442;color:#d2def8;font-size:17px;padding:0 10px}.controls>button:hover{border-color:var(--accent);color:var(--accent)}.controls>.wide{font:9px var(--mono);color:var(--accent);padding:0 14px}.controls>#restart{background:transparent;border-color:var(--line);min-width:32px;width:32px;padding:0;margin-left:7px}footer{font:8px var(--mono);line-height:1.5;min-height:26px;padding-bottom:11px;width:100%;max-width:560px;display:flex;justify-content:space-between;gap:12px;margin:auto;color:#a3b2d0}footer>span:last-child{color:#9cadd2;text-align:right}.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}noscript{position:fixed;inset:40% 10%;background:var(--ink);border:1px solid var(--accent);padding:20px;z-index:10;text-align:center;font-size:13px}@media(max-width:600px){header{height:49px;min-height:49px;padding:0 14px}.brand{font-size:10px}.brand>span{display:none}header>strong{font-size:11px}.back{font-size:8px}.hud{min-height:55px;height:55px;gap:9px}.hud>div>span{font-size:7px;letter-spacing:.2px}.hud>div>b{font-size:15px}.icon-button{width:29px;height:29px;font-size:16px}.play-area{gap:12px}.side-panel{width:64px;flex-basis:64px}.side-panel>canvas{width:64px;height:64px}.side-panel>span{font-size:7px}.side-panel>p{font-size:10px}.side-panel .side-tip{font-size:7px}.controls{gap:6px;height:59px;min-height:59px}.controls>button{min-width:32px;height:35px;padding:0 8px;font-size:16px}.controls>.wide{padding-inline:11px;font-size:8px}.controls>#restart{margin-left:2px;width:29px;min-width:29px}footer{font-size:7px;min-height:25px;padding-bottom:10px}footer>span:last-child{max-width:160px}.overlay{padding:15px}.overlay h1{font-size:31px}.eyebrow{font-size:6px;margin-bottom:14px}#dialog-description{font-size:10px;margin-top:13px}#dialog-meta{font-size:7px;margin-top:16px}.primary{margin-top:18px;min-height:40px;font-size:11px}.tips{font-size:7px;margin-top:14px}.overlay a{font-size:7px;margin-top:14px}}@media(max-height:550px){header{height:37px;min-height:37px}.brand>b{height:23px;width:23px;font-size:18px}.hud{height:40px;min-height:40px}.hud>div>span{font-size:7px;margin-bottom:1px}.hud>div>b{font-size:13px}.icon-button{height:27px;width:27px}.controls{height:40px;min-height:40px}.controls>button{height:28px;min-width:29px;font-size:14px}.controls>.wide{font-size:8px}footer{min-height:17px;padding-bottom:4px;font-size:7px}.side-panel{padding-top:0}.side-panel .side-tip{margin-top:10px}.side-panel #feedback{margin-top:8px}.overlay{padding:8px}.overlay h1{font-size:20px;letter-spacing:-1px}.eyebrow{font-size:5px;margin-bottom:5px}#dialog-description{font-size:7px;line-height:1.4;margin-top:5px}#dialog-meta{font-size:6px;margin-top:7px}.primary{min-height:26px;padding:5px;font-size:8px;margin-top:8px}.tips{font-size:6px;line-height:1.4;margin-top:6px}.overlay a{font-size:6px;margin-top:6px;padding:3px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
:root{--accent:#7cbcff}.control-label{font:8px var(--mono);letter-spacing:.5px;color:var(--muted);margin-right:8px}.overlay{padding:25px}.overlay h1{font-size:58px;letter-spacing:-3px}.overlay #dialog-description{font-size:13px}.overlay #dialog-meta{font-size:9px}.overlay .primary{min-height:48px}.overlay .tips{font-size:9px}@media(max-width:600px){.control-label{display:none}.overlay h1{font-size:49px}.overlay #dialog-description{font-size:12px}.overlay #dialog-meta{font-size:8px}}@media(max-height:550px){.overlay{padding:10px}.overlay h1{font-size:25px}.overlay #dialog-description{font-size:8px}.overlay #dialog-meta{font-size:6px}.overlay .primary{min-height:28px}.overlay .tips{font-size:6px}.control-label{font-size:7px;display:inline}}
:root{--accent:#b9a0ff}.controls>.jump-button{min-width:135px;min-height:39px;font:12px var(--mono);background:#2b2248;color:#dbc9ff;border-color:#675488}footer>span:first-child{max-width:170px}@media(max-width:600px){.control-label{display:inline;font-size:7px}.controls>.jump-button{min-width:126px;font-size:11px}}@media(max-height:550px){.controls>.jump-button{min-height:28px;height:28px;font-size:9px}}
/* Touch controls remain usable in narrow viewports and short phone landscapes. */
@media (max-width:600px), (max-height:550px) and (max-width:1000px){
  .hud{height:64px;min-height:64px;gap:8px}
  .hud>.icon-button,.controls>#restart{width:44px;height:44px;min-width:44px;min-height:44px;font-size:22px}
  .controls{height:70px;min-height:70px;gap:6px}
  .controls>button{height:44px;min-height:44px;min-width:44px;padding:0 10px;font-size:20px}
  .controls>.wide{font-size:11px;padding-inline:12px}
  .controls>.jump-button{min-height:44px;height:44px;min-width:145px;font-size:12px}
  .controls>#restart{margin-left:0;padding:0}
  .overlay .primary{min-height:44px;font-size:11px}
}
@media (max-width:600px) and (min-height:551px){
  .hud>div>span{font-size:8px;letter-spacing:.1px}
  .hud>div>b{font-size:16px}
  .overlay .tips{font-size:10px;line-height:1.7}
  .overlay #dialog-description{font-size:12px}
  .overlay #dialog-meta{font-size:9px}
  .overlay a{font-size:9px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;margin-top:9px}
  .side-panel .side-tip{font-size:9px;line-height:1.6}
  .side-panel #feedback{font-size:10px}
  .control-label{font-size:10px}
}
@media (max-width:360px) and (min-height:551px){
  .controls{flex-wrap:wrap;height:104px;min-height:104px;align-content:center;gap:6px}
  .controls>.wide{min-width:86px}
  .hud>div>span{font-size:7px}
  .hud>div>b{font-size:14px}
}

@media (min-width:601px) and (min-height:551px){.overlay .tips{font-size:11px;line-height:1.7}.overlay a{font-size:11px}.control-label{font-size:11px}.overlay #dialog-description{font-size:13px}}
@media (min-height:551px){.overlay .primary{min-height:48px;font-size:13px}}
/* Dialogs use the viewport so narrow playfields do not compress help or results. */
.overlay{position:fixed;inset:0;z-index:20;padding:16px;display:flex;align-items:center;justify-content:center;background:#0b1020e8}
.overlay>section{width:min(100%,360px);max-height:calc(100svh - 32px);overflow:auto;overscroll-behavior:contain;padding:24px;border:1px solid var(--line);border-radius:12px;background:var(--ink);box-shadow:0 22px 70px #0006}
.overlay .eyebrow{font-size:9px;letter-spacing:1.2px;margin-bottom:18px}
.overlay h1{font-size:40px;line-height:1.05;letter-spacing:-2px;overflow-wrap:anywhere}
.overlay #dialog-description{font-size:14px;line-height:1.55;margin-top:16px}
.overlay #dialog-meta{font-size:11px;line-height:1.5;margin-top:14px;color:#afbedb}
.overlay .dialog-results{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:18px 0 0;padding:14px;border:1px solid var(--line);background:#141a30;text-align:left}
#dialog-results[hidden]{display:none}
.dialog-results dt{font:10px var(--mono);line-height:1.4;color:#afbedb}
.dialog-results dd{margin:7px 0 0;font:24px var(--mono);line-height:1.2;color:var(--paper);letter-spacing:-.7px;overflow-wrap:anywhere}
.overlay .primary{min-height:48px;font-size:14px;margin-top:20px}
.overlay .tips{font-size:12px;line-height:1.55;margin-top:14px;color:#b6c5e3}
.overlay a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;font-size:11px;margin-top:10px;color:#b6c5e3}
@media (max-height:550px) and (min-width:480px){
  .overlay>section{width:min(100%,620px);padding:18px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);grid-template-areas:'kicker results' 'title results' 'description action' 'meta tips' '. back';gap:10px 24px;text-align:left}
  .overlay .eyebrow{grid-area:kicker;margin:0;font-size:8px}
  .overlay #dialog-title{grid-area:title;font-size:28px;margin:0}
  .overlay #dialog-description{grid-area:description;margin:0;font-size:12px;line-height:1.5}
  .overlay #dialog-meta{grid-area:meta;margin:0;font-size:10px}
  .overlay #dialog-results{grid-area:results;margin:0;padding:12px}
  .dialog-results dd{font-size:22px}
  .overlay #primary{grid-area:action;margin:0;min-height:44px;font-size:13px}
  .overlay #dialog-controls{grid-area:tips;margin:0;font-size:11px}
  .overlay #dialog-back{grid-area:back;margin:0;min-height:44px}
}