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0;font-size:clamp(2rem,5vw,3.2rem);line-height:1.2}.killer-guide p{font-size:1.05rem;line-height:1.9}.killer-guide section{border-top:1px solid var(--line);margin:36px 0;padding-top:24px}.killer-guide h2{margin:10px 0;font-size:1.5rem}.killer-academy-link{border:1px solid var(--line);background:var(--blue-soft);border-radius:16px;flex-wrap:wrap;align-items:center;gap:18px;margin-bottom:24px;padding:24px;display:flex}.killer-academy-link>div{flex:400px}.killer-academy-link p{margin-top:8px;font-size:1rem;line-height:1.7}.killer-academy-link>a{color:var(--blue);font-size:.875rem}@media (max-width:640px){.play-header nav{flex-wrap:wrap;height:auto}.play-header nav :is(a,button){padding-inline:10px;font-size:.875rem}.killer-difficulty>div{grid-template-columns:repeat(2,minmax(0,1fr))}.killer-difficulty>details{margin-left:12px}.killer-welcome{gap:10px;padding:14px}.killer-intro>div{grid-template-columns:1fr;gap:20px}.killer-site .play-board-footer>span:first-child{display:none}.killer-site .play-board-footer>span:last-child{margin-left:auto}}.mini-workspace{max-width:960px;margin:auto;padding:32px 24px 64px}.mini-workspace h1{letter-spacing:-.04em;margin:0 0 24px;font-size:clamp(26px,4vw,38px)}.mini-workspace h1 span{color:var(--blue);margin-left:16px;font-weight:400}.mini-game{grid-template-columns:minmax(0,460px) minmax(0,300px);align-items:center;gap:48px;display:grid}.mini-board{aspect-ratio:1;background:#fff;border:3px solid #243c64;border-radius:12px;grid-template-columns:repeat(4,1fr);display:grid;overflow:hidden}.mini-board button{color:#2866cd;cursor:pointer;background:#fff;border:1px solid #c9d5e6;border-top:0;border-left:0;min-width:0;font-family:inherit;font-size:clamp(28px,6vw,48px);font-weight:500;line-height:1}.mini-board button:nth-child(2n){border-right:3px solid #243c64}.mini-board button:nth-child(4n){border-right:0}.mini-board button:nth-child(n+5):nth-child(-n+8){border-bottom:3px solid #243c64}.mini-board button:nth-child(n+13){border-bottom:0}.mini-board button.given{color:#243c64;background:#f4f7fc;font-weight:700}.mini-board button.selected{background:#dceaff;box-shadow:inset 0 0 0 3px #3978dc}.mini-board button:focus-visible{outline-offset:-5px;outline:3px solid #215ebc}.mini-controls p{font-size:16px;line-height:1.6}.mini-controls .mini-digits{letter-spacing:.1em;color:#2866cd;font-size:30px}.mini-numpad,.mini-tools{gap:8px;margin:16px 0;display:flex}.mini-numpad button{color:#245fbb;cursor:pointer;background:#eaf1ff;border:0;border-radius:9px;flex:1;padding:12px 0;font-size:28px}.mini-tools button{cursor:pointer;background:#fff;border:1px solid #c9d5e6;border-radius:8px;flex:1;padding:10px 4px;font-size:14px}.mini-controls button:disabled{opacity:.45;cursor:default}.mini-controls small{color:#52647d;margin-top:18px;font-size:14px;line-height:1.6;display:block}.mini-guide{border-top:1px solid #c9d5e6;max-width:720px;margin-top:48px;padding-top:20px}.mini-guide p{font-size:17px;line-height:1.85}.mini-guide h2{margin-top:28px;font-size:23px}.mini-lesson-banner{background:var(--blue-soft);color:var(--blue-dark);border-radius:999px;margin:0 0 16px;padding:7px 12px;font-size:14px;display:inline-block}.mini-normal-link{color:var(--blue-dark);margin:8px 0 4px;font-size:14px;display:block}.mini-lesson{border:1px solid var(--line);background:#fff;border-radius:14px;margin-top:36px;padding:24px}.mini-lesson table{border-collapse:collapse;text-align:center;width:100%;max-width:280px;margin:18px 0}.mini-lesson td{border:1px solid #52617e;width:25%;height:52px;font-size:25px;font-weight:600}.mini-lesson tr:nth-child(2) td{border-bottom-width:3px}.mini-lesson td:nth-child(2){border-right-width:3px}.mini-lesson caption{text-align:left;margin-bottom:8px;font-weight:700}.mini-lesson h3{margin-top:24px;font-size:18px}.mini-lesson ol{padding-left:24px}.mini-lesson li{padding:9px 0 9px 4px;line-height:1.6}.mini-lesson li b{color:var(--blue-dark);display:block}.mini-lesson li span{display:block}.mini-lesson details{margin:20px 0}.mini-lesson summary{cursor:pointer;color:var(--blue-dark);font-weight:700}@media (max-width:680px){.mini-workspace{padding:24px 18px 48px}.mini-game{grid-template-columns:1fr;gap:12px}.mini-board{width:100%;max-width:420px;margin:auto}.mini-controls .mini-digits{display:none}.mini-controls{width:100%;max-width:420px;margin:auto}.mini-controls p{margin:10px 0}}.puzzle-print-button{border:1px solid var(--line);width:100%;color:var(--ink);font:inherit;cursor:pointer;background:0 0;border-radius:10px;margin:14px 0 6px;padding:12px 16px;font-size:14px;display:block}.puzzle-print-button:hover{background:var(--blue-soft)}.puzzle-print-button:disabled{opacity:.45;cursor:default}.game-focus-toggle{border:1px solid var(--line);color:var(--muted);font:inherit;cursor:pointer;background:#fff;border-radius:9px;padding:9px 13px;font-size:14px}.game-header nav{display:flex}.game-header nav a.active{background:var(--blue-soft);color:var(--blue-dark)}@media (max-width:1000px){.play-header.game-header{flex-wrap:wrap;gap:10px;height:auto;min-height:76px;padding-top:12px}.game-header .play-header-actions{order:1;margin-left:auto}.play-header.game-header nav{flex-wrap:wrap;order:2;justify-content:center;gap:4px;width:100%;height:auto;margin:0 0 10px}.play-header.game-header nav a{height:38px;padding-inline:10px;font-size:14px}}