:root{color-scheme:dark;--accent:#6cf2c2;--ai-accent:#ff5f73;--bg:#17243a;--ink:#f6f8ff;--muted:#a8b3c8}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:Inter,ui-rounded,system-ui,sans-serif;color:var(--ink);background:radial-gradient(circle at 20% 0%,color-mix(in srgb,var(--accent) 18%,transparent),transparent 34%),linear-gradient(145deg,#080c16,var(--bg));display:grid;place-items:center;padding:24px;padding-top:max(24px,env(safe-area-inset-top));padding-bottom:max(24px,env(safe-area-inset-bottom));padding-left:max(24px,env(safe-area-inset-left));padding-right:max(24px,env(safe-area-inset-right))}.shell{width:min(720px,100%);background:#0a1020cc;border:1px solid #ffffff1c;border-radius:28px;padding:clamp(18px,4vw,38px);box-shadow:0 30px 100px #0008;backdrop-filter:blur(18px)}header{display:flex;align-items:start;justify-content:space-between;gap:20px}.eyebrow{text-transform:uppercase;letter-spacing:.15em;color:var(--accent);font-weight:800;font-size:.72rem;margin:0 0 8px}h1{font-size:clamp(2.2rem,7vw,4rem);line-height:.9;letter-spacing:-.05em;margin:0;max-width:760px}.pitch{color:var(--muted);font-size:1.05rem;max-width:620px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:25px 0 14px}.stats div{background:#ffffff0a;border:1px solid #ffffff12;border-radius:16px;padding:12px 16px;text-align:center}.stats span{display:block;color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.1em}.stats strong{font-size:1.6rem}.game{background:linear-gradient(160deg,#ffffff08,#0002);border:1px solid #ffffff14;border-radius:22px;padding:18px;display:flex;justify-content:center;overflow-x:auto}
.board-wrap{position:relative;width:min(520px,86vw,62vh);min-width:280px;aspect-ratio:1/1}
#lines{position:absolute;inset:0;width:100%;height:100%}
#lines line{stroke:#ffffff33;stroke-width:.6}
#points{position:absolute;inset:0}
.point{position:absolute;width:9%;height:9%;min-width:22px;min-height:22px;transform:translate(-50%,-50%);border-radius:50%;border:2px solid #ffffff3a;background:#0d1526;cursor:default;padding:0;touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.point.you{background:var(--accent);border-color:var(--accent)}
.point.ai{background:var(--ai-accent);border-color:var(--ai-accent)}
.point.empty.selectable{cursor:pointer;border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 35%,transparent)}
.point.own-selectable{cursor:pointer}
.point.own-selectable:hover{transform:translate(-50%,-50%) scale(1.15)}
.point.selected{box-shadow:0 0 0 4px #fff}
.point.removable{cursor:pointer;box-shadow:0 0 0 3px #ffd166;animation:removablepulse 1s infinite}
.point.removing{animation:removepiece .26s ease forwards}
@keyframes removablepulse{0%,100%{box-shadow:0 0 0 3px #ffd166}50%{box-shadow:0 0 0 6px color-mix(in srgb,#ffd166 40%,transparent)}}
@keyframes removepiece{to{transform:translate(-50%,-50%) scale(.15);opacity:0}}
.point.hinted{animation:hintFlash 1.1s ease}
@keyframes hintFlash{0%,100%{box-shadow:none}30%{box-shadow:0 0 0 4px #ffd166}}
@media(prefers-reduced-motion:reduce){.point.hinted{animation:none;box-shadow:0 0 0 4px #ffd166}}
.point.own-selectable:active{transform:translate(-50%,-50%) scale(1.05)}
.point.empty.selectable:active{transform:translate(-50%,-50%) scale(.9)}
.header-btns{display:flex;gap:8px;flex-wrap:wrap}
.stats strong.score-pop{animation:scorepop .5s ease}
@keyframes scorepop{0%{transform:scale(1.4);color:var(--accent)}100%{transform:scale(1)}}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.steps{margin:0 0 12px;padding-left:22px;display:flex;flex-direction:column;gap:10px}
.steps li{line-height:1.45}
.actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:14px}.actions p{color:var(--muted);margin:0}button,a{font:inherit}button{border:0;border-radius:999px;background:var(--accent);color:#101522;font-weight:850;padding:12px 20px;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;min-height:44px}button:active{transform:scale(.96)}.quiet{background:#ffffff0d;color:var(--ink);white-space:nowrap}footer{display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:.84rem;margin-top:28px}a{color:var(--accent);text-decoration:none}dialog{max-width:460px;max-height:88vh;overflow-y:auto;border:1px solid #ffffff20;border-radius:22px;background:#10182a;color:var(--ink);padding:28px;box-shadow:0 30px 100px #000}dialog::backdrop{background:#02040bd9}dialog button{margin-top:12px}@media(max-width:600px){body{padding:10px}.shell{border-radius:20px;padding:16px}header{display:block}.quiet{margin-top:8px}.stats strong{font-size:1.25rem}}@media(prefers-reduced-motion:reduce){.point.removable,.point.removing,.stats strong.score-pop,button{animation:none;transition:none}}
@media(max-height:480px){.board-wrap{width:min(520px,86vw,50vh);min-width:240px}}
#hint-btn:disabled{opacity:.4;cursor:not-allowed}
footer a:first-child{color:var(--ink);font-weight:700}
footer a.quiet-link{color:var(--muted)}
.hidden{display:none!important}
.campaign-head h2{margin:18px 0 4px;font-size:1.3rem}
.campaign-sub{color:var(--muted);margin:0 0 16px;max-width:640px}
.tier-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin-bottom:16px}
.tier-card{display:flex;flex-direction:column;align-items:flex-start;gap:2px;text-align:left;background:#ffffff0a;border:1px solid #ffffff18;border-radius:16px;padding:14px 16px;cursor:pointer;transition:transform .15s,border-color .15s,background .15s;font:inherit;color:var(--ink)}
.tier-card:hover:not(:disabled){transform:translateY(-3px);border-color:var(--accent)}
.tier-card:disabled{opacity:.45;cursor:not-allowed}
.tier-card.current{border-color:var(--accent);box-shadow:0 0 0 2px color-mix(in srgb,var(--accent) 45%,transparent)}
.tier-card.beaten{background:color-mix(in srgb,var(--accent) 12%,#ffffff0a)}
.tier-num{font-size:.72rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.tier-name{font-size:1.15rem;font-weight:800}
.tier-title{color:var(--muted);font-size:.85rem}
.tier-badge{margin-top:6px;font-size:.78rem;font-weight:700;color:var(--accent)}
.tier-card.locked .tier-badge{color:var(--muted)}
#practice-btn{margin-bottom:22px}
.opponent-banner{display:flex;align-items:baseline;gap:10px;margin:6px 0 2px;flex-wrap:wrap}
.opponent-banner span:first-child{font-weight:800;font-size:1.1rem}
.opponent-banner span:last-child{color:var(--muted);font-size:.85rem}
.opponent-flavor{color:var(--muted);font-size:.88rem;font-style:italic;margin:0 0 10px;max-width:640px}
.recap{color:var(--muted);font-size:.88rem;line-height:1.5;margin-top:2px}
.reward{color:var(--accent);font-weight:700}
.gameover-btns{display:flex;gap:10px;flex-wrap:wrap}
@media(max-width:600px){.tier-grid{grid-template-columns:repeat(auto-fill,minmax(130px,1fr))}}