:root{color:#16201f;background:#f7faf8;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button{border:1px solid #b9c8c3;border-radius:8px;background:#fff;color:inherit;cursor:pointer;font:inherit}button:hover:not(:disabled){border-color:#127c72}button:disabled{cursor:not-allowed;opacity:.45}.app{min-height:100vh;padding:28px}.topbar{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:0 auto 28px;max-width:1180px}.eyebrow{margin:0 0 6px;color:#697c78;font-size:.78rem;font-weight:700;letter-spacing:0;text-transform:uppercase}h1,h2,h3,p{margin-top:0}h1{margin-bottom:0;font-size:clamp(2rem,5vw,4.4rem);line-height:.95}h2{margin-bottom:14px;font-size:1.7rem}h3{margin-bottom:12px;font-size:1rem}.level-switcher,.action-row,.top-actions{display:flex;align-items:center;gap:10px}.level-switcher button,.action-row button,.complete-panel button,.top-actions>button,.primary-action{min-height:42px;padding:0 14px;font-weight:700}.primary-action{border-color:#0f766e;background:#0f766e;color:#fff}.level-switcher span{min-width:54px;text-align:center;font-weight:800}.game-layout{display:grid;grid-template-columns:minmax(220px,.85fr) minmax(0,1.5fr) minmax(220px,.9fr);gap:24px;margin:0 auto;max-width:1180px}.lesson,.controls{align-self:start;border:1px solid #d8e3df;border-radius:8px;background:#fff;padding:20px}.lesson p{color:#40514d;line-height:1.7}.difficulty{display:inline-block;margin-bottom:16px;border:1px solid #bfc6ee;border-radius:999px;background:#f0f2ff;padding:5px 10px;color:#27305f;font-size:.82rem;font-weight:900}.difficulty.medium{border-color:#d99b2b;background:#fff7e8;color:#4e3b18}.difficulty.hard{border-color:#7e5aa8;background:#f4edff;color:#4f2873}.difficulty.expert{border-color:#be123c;background:#fff1f2;color:#9f1239;box-shadow:0 2px 8px 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#ffffff8c}.tile:disabled{opacity:1}.tile-off{background:#fff}.tile-on{border-color:#0f766e;background:#1a9b8f;color:#fff}.tile-random{border-color:#5868b7;background:#eef1ff}.phase-shifted{border-style:dashed}.phase-shifted:after{position:absolute;top:10px;right:10px;width:18px;height:18px;border:2px solid currentColor;border-left-color:transparent;border-radius:50%;content:""}.pending{outline:4px solid #d99b2b;outline-offset:3px}.tile-label{font-size:clamp(1rem,4vw,1.65rem);font-weight:900}.tile-mark{display:grid;gap:8px;width:54%;transform:rotate(-12deg)}.phase-shifted .tile-mark{transform:rotate(12deg)}.random-line{height:10px;border-radius:999px;background:#5868b7}.gate-grid{display:grid;grid-template-columns:repeat(2,minmax(78px,1fr));gap:10px}.gate{min-height:58px;border-width:2px;font-size:1.35rem;font-weight:900}.gate.selected{border-color:#0f766e;background:#dff6f2;color:#075f57}.mini-guide{margin-bottom:22px;border-bottom:1px solid #d8e3df;padding-bottom:16px}.mini-guide 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p{margin-bottom:0}.comparison-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-bottom:16px}.comparison-grid div{border-top:3px solid #5868b7;background:#f0f2ff;padding:16px}.comparison-grid p{margin:8px 0 0}.comparison-grid.compact{grid-template-columns:repeat(2,minmax(0,1fr));margin-bottom:14px}.state-table{display:grid;gap:10px}.state-row{display:grid;grid-template-columns:96px 72px 1fr;gap:12px;align-items:start;border-left:4px solid #5868b7;background:#f7f8ff;padding:14px}.state-row strong{color:#27305f}.state-row span{display:inline-grid;place-items:center;min-height:30px;border:1px solid #bfc6ee;border-radius:8px;background:#fff;color:#27305f;font-weight:900}.state-row p{margin-bottom:0}.learning-path{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.learning-path span{display:block;border-top:3px solid #d99b2b;background:#fff7e8;padding:14px;color:#4e3b18;font-weight:800;line-height:1.55}@media(max-width:920px){.topbar{align-items:stretch;flex-direction:column}.game-layout{grid-template-columns:1fr}.top-actions{align-items:stretch;flex-direction:column}.intro-grid,.concept-grid,.lesson-grid,.comparison-grid,.learning-path,.comparison-grid.compact{grid-template-columns:1fr}}@media(min-width:761px)and (max-width:1100px){.app{padding:22px}.topbar{align-items:stretch;flex-direction:column;margin-bottom:20px}.top-actions{justify-content:space-between}.game-layout{grid-template-columns:minmax(0,1fr) minmax(230px,280px);gap:18px}.lesson{grid-column:1 / -1}.board-area{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.board{max-width:none;gap:10px}.controls{align-self:start}.gate-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:560px){.app{padding:18px}.board-area{grid-template-columns:1fr}.board{grid-template-columns:repeat(2,minmax(104px,1fr))}.level-switcher{align-items:stretch;display:grid;grid-template-columns:1fr auto 1fr}.legend-item{grid-template-columns:62px 1fr}.legend-tile{width:62px;min-height:62px}.state-row{grid-template-columns:1fr}.state-row span{justify-self:start;min-width:72px}}@media(max-width:760px){body{background:#f7faf8}button{min-height:46px}.app{padding:14px}.topbar{gap:14px;margin-bottom:16px}h1{font-size:2rem;line-height:1}h2{font-size:1.28rem}.top-actions{gap:8px}.top-actions>button{width:100%}.level-switcher{display:grid;grid-template-columns:minmax(0,1fr) 56px minmax(0,1fr);gap:8px}.level-switcher button{padding:0 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button{width:100%}.complete-panel{margin-top:12px;padding:12px}.learning-goal,.quantum-note{margin-bottom:12px;padding:10px}.stats{margin-top:16px}.stats div{padding:10px}.stats dd{font-size:1.45rem}.intro-page{gap:18px}.intro-hero{gap:12px}.intro-hero p{font-size:1rem;line-height:1.7}.intro-actions,.primary-action{width:100%}.intro-panel{padding:16px}.legend-item{grid-template-columns:56px 1fr;gap:12px}.legend-tile{width:56px;min-height:56px}.concept-card{grid-template-columns:48px 1fr;padding:12px}.concept-gate{width:48px;height:48px}}