:root{--bg: #eff1f5;--fg: #131822;--muted: #6b7686;--hole: #c4ccd8;--shell: #dbe0e9;--bar-bg: #dde2ea;--ok: #16a34a;--ok-ink: #06281a;--bad: #dc2626;--line: #d8dde6;--surface: #ffffff;--tile-lift: 0%;--c: 20px}@media(prefers-color-scheme:dark){:root{--bg: #0c111c;--fg: #f0f3f8;--muted: #8d97a8;--hole: #070b13;--shell: #1a2130;--bar-bg: #232b3d;--ok: #22c55e;--bad: #ef4444;--line: #252e40;--surface: #141b29;--tile-lift: 10%}}*{box-sizing:border-box;margin:0}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap}[hidden]{display:none!important}html{overscroll-behavior:none}body{background:var(--bg);color:var(--fg);font-family:system-ui,-apple-system,sans-serif;max-width:420px;margin:0 auto;padding:12px 16px calc(24px + env(safe-area-inset-bottom));user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}.challenge-banner{margin:0 0 12px;padding:10px 12px;border:1px solid color-mix(in srgb,var(--ok) 45%,var(--line));border-radius:12px;background:color-mix(in srgb,var(--ok) 10%,var(--surface));color:var(--fg);font-size:.86rem;font-weight:650;text-align:center}.tier-streaks{display:grid;gap:7px;margin-top:16px;padding-top:14px;border-top:1px solid var(--line)}.tier-streaks>div{display:flex;justify-content:space-between;gap:16px;color:var(--muted);font-size:.84rem}.tier-streaks b{color:var(--fg);font-variant-numeric:tabular-nums}.header{display:flex;align-items:baseline;gap:8px}.header h1{font-size:1.4rem;letter-spacing:.08em}.logo-tiles{display:grid;grid-template-columns:repeat(2,9px);gap:2px;align-self:center;flex:none}.logo-tile{width:9px;height:9px;border-radius:3px;background:var(--piece-c)}.day{color:var(--muted);font-size:.8rem;border:1px solid var(--line);border-radius:999px;padding:1px 8px;align-self:center}.header-tools{margin-left:auto;display:flex;gap:6px;align-self:center}.icon-btn{width:44px;height:44px;display:grid;place-items:center;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--muted);font:inherit;font-size:1rem;font-weight:700;cursor:pointer}.icon-btn:hover{color:var(--fg)}.score{display:flex;align-items:flex-end;gap:8px;margin-top:12px}.fill-pct{font-size:2.4rem;line-height:1;font-weight:700;letter-spacing:-.02em;font-variant-numeric:tabular-nums;color:var(--ok)}.fill-caption{color:var(--muted);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;padding-bottom:4px}.gaps-left{margin-left:auto;color:var(--muted);font-size:.78rem;font-weight:600;font-variant-numeric:tabular-nums;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:3px 10px}.fill-bar{position:relative;height:10px;border-radius:5px;background:var(--bar-bg);margin:10px 0 0}.fill-bar-inner{height:100%;border-radius:5px;background:var(--ok);transform-origin:0 50%;transform:scaleX(0);transition:transform .15s ease}.board-wrap{position:relative;max-width:min(100%,var(--fit, 100%));margin-inline:auto;--frame-pad: 8px;padding:var(--frame-pad);background:var(--shell);border-radius:14px;box-shadow:inset 0 2px 6px #00000024,0 1px #ffffff59}.board{display:grid;grid-template-columns:repeat(var(--size),1fr);aspect-ratio:1}.bcell{background:var(--hole);background-clip:padding-box;border:2px solid transparent;border-radius:9px;box-shadow:inset 0 2px 3px #00000038,inset 0 -1px #ffffff0d}.bcell.ghost-ok{background-color:color-mix(in srgb,var(--ok) 45%,var(--hole))}.bcell.ghost-bad{background-color:color-mix(in srgb,var(--bad) 40%,var(--hole))}.bcell.blocked{visibility:hidden}.pieces-layer{position:absolute;inset:var(--frame-pad);pointer-events:none}.piece{position:relative;touch-action:none;cursor:grab}.piece:focus-visible{outline:3px solid var(--fg);outline-offset:3px;border-radius:4px}.pcell{position:absolute;--hl: .25;--sd: .18;--bw: 1.5px;background:color-mix(in srgb,var(--piece-c),white var(--tile-lift));box-shadow:inset 0 1px rgb(255 255 255 / var(--hl)),inset 0 -2px rgb(0 0 0 / var(--sd))}.board-piece{position:absolute;left:0;top:0;pointer-events:none}.board-piece .pcell{pointer-events:auto}.board-piece .pcell:after{content:"";position:absolute;inset:-2px}.drag-layer{position:fixed;inset:0;pointer-events:none;z-index:40}.drag-piece{position:absolute;left:0;top:0;transform-origin:0 0;will-change:transform;filter:drop-shadow(0 10px 18px rgb(0 0 0 / .3))}.tray{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-start;padding:12px;margin-top:14px;background:var(--surface);border:1px solid var(--line);border-radius:14px;min-height:100px}.tray-piece{min-width:calc(var(--c) * var(--slot, 1));min-height:calc(var(--c) * var(--slot, 1))}.tray-hint{margin:8px 2px 0;color:var(--muted);font-size:.78rem;text-align:center}.board-piece.lifted{visibility:hidden}.tray-piece.placed{pointer-events:none;cursor:default}.tray-piece.placed .pcell,.tray-piece.lifted .pcell{background:transparent;box-shadow:none;border-style:dashed;border-width:var(--bw);border-color:color-mix(in srgb,var(--fg) 30%,transparent)}.level-goal{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:10px 0 14px}.level-goal-copy{color:var(--muted);font-size:.9rem;font-weight:600}.level-steps{display:flex;gap:5px;flex:none}.level-step{width:10px;height:10px;border:2px solid var(--line);border-radius:50%}.level-step.completed{border-color:var(--ok);background:var(--ok)}.level-step.current{border-color:var(--fg)}.rules-steps{margin:0;padding-left:1.25rem;display:grid;gap:.5rem;text-align:left}.primary{width:100%;min-height:44px;border:none;border-radius:10px;background:var(--fg);color:var(--bg);font:inherit;font-weight:700}.primary:disabled{cursor:default;opacity:.45}.ghost{width:100%;min-height:44px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--fg);font:inherit;font-weight:600}.sheet-layer{position:fixed;inset:0;z-index:60;display:flex;align-items:flex-end;justify-content:center}.sheet-scrim{position:absolute;inset:0;background:color-mix(in srgb,var(--hole) 62%,transparent);backdrop-filter:blur(3px);opacity:0;transition:opacity .22s ease}.sheet-layer.open .sheet-scrim{opacity:1}.sheet{position:relative;width:100%;max-width:420px;max-height:88%;overflow-y:auto;padding:10px 18px calc(20px + env(safe-area-inset-bottom));background:var(--surface);border-radius:22px 22px 0 0;box-shadow:0 -12px 40px -12px #0006;transform:translateY(18px);opacity:0;transition:transform .28s cubic-bezier(.2,.9,.25,1),opacity .2s ease;text-align:center}.sheet-layer.open .sheet{transform:translateY(0);opacity:1}.sheet-grab{width:38px;height:4px;border-radius:2px;background:color-mix(in srgb,var(--fg) 18%,transparent);margin:0 auto 12px}.sheet-close{position:absolute;top:6px;right:6px;width:44px;height:44px;border:0;border-radius:50%;background:transparent;color:var(--muted);font-size:1.4rem;line-height:1;cursor:pointer}.sheet-title{font-size:1.3rem;margin:0 0 4px}.sheet-body{display:grid;grid-template-columns:minmax(0,1fr);gap:12px}.sheet-note{margin:0;color:var(--muted);font-size:.85rem}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}.stat{padding:10px 4px 8px;border-radius:12px;background:color-mix(in srgb,var(--shell) 45%,var(--surface))}.stat b{display:block;font-size:1.15rem;line-height:1.2;font-weight:700;font-variant-numeric:tabular-nums}.stat span{color:var(--muted);font-size:.58rem;letter-spacing:.1em;text-transform:uppercase}.result{margin-top:18px}.result-screen{display:flex;flex-direction:column;gap:.75rem;text-align:center;min-width:0}.result-heading{font-size:1.4rem;font-weight:700}.result-score{margin-top:-.5rem;color:var(--muted)}.share-accent{background:var(--ok);color:var(--ok-ink)}.result-meta{color:var(--muted);font-size:.9rem}.result-percentile{margin:0 auto;padding:.25rem .75rem;border-radius:999px;background:var(--ok);color:#fff;font-weight:600}.result-statline{margin-top:-.25rem;color:var(--muted);font-size:.9rem}.share-preview{margin:0;padding:.75rem .5rem;border:1px solid var(--line);border-radius:14px;background:color-mix(in srgb,var(--shell) 28%,var(--surface));font-family:inherit;font-size:1rem;line-height:1.15;letter-spacing:.02em;max-width:100%;overflow-x:auto}.share-targets{display:flex;justify-content:center;gap:12px}.share-target{width:46px;height:46px;display:grid;place-items:center;border:0;border-radius:50%;color:#fff;cursor:pointer}.share-x{background:#14161a}@media(prefers-color-scheme:dark){.share-x{background:#f2f4f8;color:#14161a}}.share-wa{background:#22b25b}.share-copy{background:color-mix(in srgb,var(--fg) 55%,var(--surface))}.countdown{color:var(--muted);font-variant-numeric:tabular-nums}.confetti{position:fixed;inset:0;width:100%;height:100%;z-index:70;pointer-events:none}.pop{animation:pop .16s ease}@keyframes pop{40%{scale:1.08}}.shake{animation:shake .2s ease}.celebrate{animation:celebrate-pop .48s ease both}@keyframes celebrate-pop{35%{scale:1.07;filter:brightness(1.25)}}@keyframes shake{25%{translate:-3px 0}50%{translate:3px 0}75%{translate:-2px 0}}@media(prefers-reduced-motion:reduce){.pop,.shake,.celebrate{animation:none}.fill-bar-inner{transition:none}}.about{margin-top:48px;padding-top:16px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem;line-height:1.5;user-select:text;-webkit-user-select:text}.about h2{color:var(--fg);font-size:1rem;margin:16px 0 6px}.about p,.about ul{margin:0 0 10px}.about ul{padding-left:18px}