:root{--bg: #f5f7f8;--surface: #ffffff;--surface-soft: #eef3f8;--ink: #1f2933;--muted: #60717c;--line: #d7e1e6;--accent: #0f2d59;--accent-strong: #0a1f3d;--accent-blue: #2563eb;--danger: #b42318;--success: #166534;--success-bg: #ecfdf3;--shadow: 0 16px 40px rgba(31, 41, 51, .08);--radius: 8px;--content: 1120px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.65;margin:0}a{color:var(--accent-strong);text-underline-offset:.18em}a:hover{color:var(--accent-blue)}.skip-link{background:var(--ink);color:#fff;left:16px;padding:8px 10px;position:absolute;top:-48px;z-index:100}.skip-link:focus{top:12px}.site-header{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.header-inner,.section,.footer-inner{margin:0 auto;width:min(100% - 32px,var(--content))}.header-inner{align-items:center;display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;min-height:72px;padding:12px 0}.brand{align-items:center;color:var(--ink);display:inline-flex;font-weight:800;gap:10px;text-decoration:none}.brand-mark{align-items:center;background:var(--accent);border-radius:6px;color:#fff;display:inline-flex;height:36px;justify-content:center;width:36px}.site-nav{display:flex;flex-wrap:wrap;gap:8px 18px}.site-nav a{color:var(--ink);font-size:.95rem;font-weight:700;text-decoration:none}.site-nav a:hover,.site-nav a[aria-current=page]{color:var(--accent-strong)}main{min-height:70vh}.main-primary{min-width:0}.category-sidebar{display:none}.section{padding:36px 0}.section.tight{padding-top:22px}.hero,.page-header{background:var(--surface);border-bottom:1px solid var(--line)}.hero-grid{display:grid;gap:28px;padding:48px 0 30px}.hero-copy{max-width:800px}.eyebrow,.badge{color:var(--accent-strong);font-size:.84rem;font-weight:800;letter-spacing:0;margin:0 0 10px;text-transform:uppercase}h1,h2,h3{line-height:1.22;margin:0 0 14px}h1{font-size:clamp(1.5rem,5vw,2rem)}h2{font-size:clamp(1.3rem,4vw,1.75rem)}h3{font-size:1.05rem}p{margin:0 0 16px}.lead{color:var(--muted);font-size:1.08rem;max-width:780px}.button-row,.hero-actions{align-items:center;display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.button{align-items:center;background:var(--accent);border:1px solid var(--accent);border-radius:var(--radius);color:#fff;cursor:pointer;display:inline-flex;font:inherit;font-weight:800;justify-content:center;min-height:44px;padding:10px 16px;text-decoration:none}.button:hover{background:var(--accent-strong);border-color:var(--accent-strong);color:#fff}.button.secondary{background:#fff;border-color:var(--line);color:var(--ink)}.grid,.cards-grid,.related-grid{display:grid;gap:18px}.card,.content-panel,.calculator-panel,.result-panel,.game-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.card,.content-panel,.calculator-panel,.result-panel,.game-panel{padding:22px}.card p{color:var(--muted)}.card a{font-weight:800}.breadcrumb{color:var(--muted);font-size:.92rem;margin-bottom:12px}.breadcrumb a{color:var(--muted)}.calculator-layout,.game-layout{display:grid;gap:22px}.form-grid{display:grid;gap:16px}.field{display:grid;gap:7px}label,.field span{font-weight:800}input,select,textarea{background:#fff;border:1px solid #b9c7d0;border-radius:6px;color:var(--ink);font:inherit;min-height:44px;padding:10px 12px;width:100%}input:focus,select:focus,textarea:focus,button:focus-visible,a:focus-visible{outline:3px solid rgba(37,99,235,.28);outline-offset:2px}textarea{min-height:140px;resize:vertical}.range-control{gap:9px}input[type=range].linked-range{accent-color:var(--accent);border:0;min-height:30px;padding:0}.form-message{color:var(--danger);font-weight:800;min-height:24px}.result-box{background:var(--success-bg);border:1px solid #bbf7d0;border-radius:var(--radius);margin-top:14px;padding:18px}.result-box.is-empty{background:#fff;border-color:var(--line);color:var(--muted)}.result-label{color:var(--muted);display:block;font-weight:800;margin-bottom:6px}.result-value{color:var(--success);display:block;font-size:clamp(1.7rem,8vw,2.25rem);font-weight:900;line-height:1.15;overflow-wrap:anywhere}.result-detail{color:var(--muted);margin-top:8px}.formula{background:#f8fafc;border-left:4px solid var(--accent);border-radius:0 6px 6px 0;font-family:Courier New,Courier,monospace;overflow-x:auto;padding:14px 16px;white-space:nowrap}.definition-list{display:grid;gap:12px;margin:16px 0 0}.definition-list div{border-top:1px solid var(--line);padding-top:12px}.definition-list dt{font-weight:800}.definition-list dd{color:var(--muted);margin:4px 0 0}.note-list{margin:0;padding-left:20px}.note-list li+li{margin-top:8px}.metric-grid{display:grid;gap:10px;margin-top:16px}.metric{background:#fff;border:1px solid var(--line);border-radius:6px;padding:12px}.metric span{color:var(--muted);display:block;font-size:.88rem;font-weight:800;margin-bottom:4px}.metric strong{color:var(--ink);display:block;font-size:1.05rem;overflow-wrap:anywhere}.utility-privacy-note{align-items:start;background:#edf7f4;border:1px solid #b7ded5;border-radius:var(--radius);color:#164e43;display:grid;gap:4px;padding:14px 16px}.utility-privacy-note strong{font-size:1rem}.utility-dropzone{align-items:center;background:#f8fafc;border:2px dashed #9fb2c1;border-radius:var(--radius);color:var(--accent-strong);cursor:pointer;display:grid;gap:6px;justify-items:center;margin-bottom:12px;min-height:154px;padding:22px;text-align:center}.utility-dropzone span{font-size:1.05rem;font-weight:900}.utility-dropzone small,.field small,.utility-file-status{color:var(--muted)}.utility-dropzone.is-dragging{background:#eaf2ff;border-color:var(--accent-blue)}.utility-file-status{font-size:.94rem;margin-bottom:18px}.utility-result-list{display:grid;gap:12px;margin-top:14px}.utility-result-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);display:grid;gap:12px;padding:14px}.utility-result-card h3{margin:0;overflow-wrap:anywhere}.utility-result-card .metric-grid{margin-top:0}.utility-metric-grid{display:grid;gap:10px;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:14px}.text-counter-area{min-height:320px}.qr-preview{align-items:center;background:#f8fafc;border:1px solid var(--line);border-radius:var(--radius);display:grid;gap:12px;justify-items:center;margin-top:14px;padding:18px;text-align:center}.qr-preview canvas{background:#fff;border:1px solid var(--line);height:min(100%,320px);image-rendering:pixelated;max-width:100%;width:min(100%,320px)}.section-nav{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));margin-top:18px}.section-nav a{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);font-weight:800;padding:12px 14px;text-decoration:none}.section-nav a:hover{border-color:var(--accent);color:var(--accent-strong)}.unit-result-list{display:grid;gap:8px;list-style:none;margin:16px 0 0;max-height:360px;overflow:auto;padding:0}.unit-result-list li{align-items:baseline;background:#fff;border:1px solid var(--line);border-radius:6px;display:grid;gap:4px;padding:10px 12px}.unit-result-list strong{color:var(--ink);overflow-wrap:anywhere}.unit-result-list span{color:var(--muted);font-size:.9rem}.dual-calculator{display:grid;gap:22px}.formula-list{display:grid;gap:10px;list-style:none;margin:16px 0 0;padding:0}.formula-list li{background:#f8fafc;border:1px solid var(--line);border-radius:6px;display:grid;gap:4px;padding:12px}.formula-list strong{color:var(--accent-strong)}.tag-list{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:14px 0 0;padding:0}.tag-list li{background:var(--surface-soft);border:1px solid var(--line);border-radius:999px;color:var(--accent-strong);font-size:.86rem;font-weight:800;padding:3px 10px}.site-footer{background:#1f2933;color:#d7e0e5;margin-top:40px}.footer-inner{padding:32px 0}.footer-grid{display:grid;gap:20px}.site-footer a{color:#d2f5ef}.footer-links{display:flex;flex-wrap:wrap;gap:10px 18px}.fine-print{color:#aab7c0;font-size:.92rem;margin-top:20px}.article-body{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.article-body h2{margin-top:28px}.article-figure{display:grid;gap:8px;justify-items:center;margin:28px 0}.article-figure img{background:#fff;border:1px solid var(--line);border-radius:var(--radius);display:block;height:auto;max-width:100%;width:min(100%,480px)}.article-figure figcaption{color:var(--muted);font-size:.92rem;text-align:center}.article-section-heading{align-items:end;display:grid;gap:8px;margin-bottom:18px}.article-section-heading p{color:var(--muted);margin:0}.ranked-list,.article-category-stack,.article-list{display:grid;gap:12px}.ranked-item,.article-list a{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);text-decoration:none}.ranked-item{align-items:center;display:grid;gap:10px;grid-template-columns:42px minmax(0,1fr) auto;padding:14px 16px}.ranked-item span{align-items:center;background:var(--accent);border-radius:50%;color:#fff;display:inline-flex;font-weight:900;height:32px;justify-content:center;width:32px}.ranked-item small,.article-list time,.article-list span{color:var(--muted)}.article-list a{display:grid;gap:4px;padding:14px}.ranked-item:hover,.article-list a:hover{border-color:var(--accent)}.game-board{display:grid;gap:6px;grid-template-columns:repeat(3,minmax(0,1fr));margin:18px auto;max-width:360px}.tile{align-items:center;aspect-ratio:1;background:#fff;border:1px solid var(--line);border-radius:var(--radius);cursor:pointer;display:inline-flex;font:inherit;font-size:1.5rem;font-weight:900;justify-content:center}.tile.is-empty{background:transparent;border-color:transparent;cursor:default}.game-message{background:var(--surface-soft);border:1px solid var(--line);border-radius:var(--radius);font-weight:800;padding:10px 12px}.game-share{display:flex;justify-content:flex-start}.game-start-panel{align-items:center;background:#ffffffe6;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 18px 44px #0f1f3d1f;display:grid;gap:14px;justify-items:center;margin:0 auto;max-width:420px;min-height:180px;padding:24px;text-align:center;width:min(100%,420px)}.game-start-panel p{color:var(--ink);font-weight:900;margin:0}.game-start-button{min-width:150px}.quicktap-start-panel{grid-column:1 / -1}.game-shell{display:grid;gap:16px}.game-status-grid{display:grid;gap:10px;grid-template-columns:repeat(2,minmax(0,1fr))}.game-stat{background:#f8fafc;border:1px solid var(--line);border-radius:var(--radius);padding:12px}.game-stat span{color:var(--muted);display:block;font-size:.9rem;font-weight:800}.game-stat strong{display:block;font-size:1.25rem;line-height:1.2;overflow-wrap:anywhere}.othello-board,.quicktap-grid,.tic-grid,.memory-grid,.slide-grid,.lights-grid{display:grid;gap:6px;margin-inline:auto;width:min(100%,520px)}.othello-board{aspect-ratio:1;background:#0f5f4a;border:8px solid #28483e;border-radius:var(--radius);gap:2px;grid-template-columns:repeat(8,minmax(0,1fr));padding:2px}.othello-cell{align-items:center;aspect-ratio:1;background:#178365;border:1px solid rgba(255,255,255,.18);border-radius:2px;cursor:default;display:inline-flex;justify-content:center;padding:0}.othello-cell.is-valid{cursor:pointer;position:relative}.othello-cell.is-valid:after{background:#ffffff6b;border-radius:50%;content:"";height:28%;width:28%}.othello-cell:disabled{color:inherit;opacity:1}.disc{border-radius:50%;box-shadow:inset 0 2px 4px #ffffff47,0 2px 4px #00000047;display:block;height:78%;width:78%}.disc.is-black{background:#12191f}.disc.is-white{background:#f8fafc}.quicktap-grid{grid-template-columns:repeat(3,minmax(0,1fr));max-width:430px}.tap-button,.tic-cell,.memory-card,.slide-tile,.light-cell{align-items:center;aspect-ratio:1;border:1px solid var(--line);border-radius:var(--radius);cursor:pointer;display:inline-flex;font:inherit;font-weight:900;justify-content:center;min-width:0;padding:0}.tap-button:disabled,.tic-cell:disabled,.memory-card:disabled,.slide-tile:disabled,.light-cell:disabled{opacity:1}.tap-button{background:#fff;color:var(--accent-strong);font-size:2rem}.tap-button.is-done{background:var(--success-bg);color:#166534;cursor:default}.tap-button.is-hidden-number{background:#f8fafc;color:transparent}.tic-grid{grid-template-columns:repeat(3,minmax(0,1fr));max-width:430px}.tic-cell{background:#fff;color:var(--ink);font-size:2.8rem}.tic-cell.is-human{color:var(--accent-strong)}.tic-cell.is-ai{color:var(--danger)}.tic-cell.is-winning{background:var(--success-bg);border-color:#22c55e}.memory-grid,.slide-grid{grid-template-columns:repeat(4,minmax(0,1fr));max-width:520px}.memory-card{background:#1f2933;color:#fff;font-size:1.7rem}.memory-card.is-open,.memory-card.is-matched{background:#dbeafe;color:#1d4ed8}.memory-card.is-matched{background:var(--success-bg);color:#166534;cursor:default}.slide-grid{background:#d6e0e5;border:1px solid var(--line);border-radius:var(--radius);gap:4px;padding:4px}.slide-tile{background:#fff;color:var(--ink);font-size:1.7rem}.slide-tile.is-movable{border-color:var(--accent);color:var(--accent-strong)}.slide-tile.is-empty{background:transparent;border-color:transparent;cursor:default}.slide-tile:not(.is-movable){cursor:default}.lights-grid{grid-template-columns:repeat(5,minmax(0,1fr));max-width:500px}.shogi-shell{gap:18px}.shogi-status-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.shogi-table{display:grid;gap:12px}.shogi-hand-box{background:#f8fafc;border:1px solid var(--line);border-radius:var(--radius);padding:12px}.shogi-hand-box h2{color:var(--muted);font-size:.9rem;margin-bottom:8px}.shogi-hand{display:flex;flex-wrap:wrap;gap:8px;min-height:40px}.shogi-hand-empty{color:var(--muted);font-weight:800;margin:0}.shogi-hand-piece{align-items:center;background:#fff;border:1px solid #b9c7d0;border-radius:6px;color:var(--ink);cursor:pointer;display:inline-flex;font:inherit;font-weight:900;gap:6px;min-height:38px;padding:6px 10px}.shogi-hand-piece span{color:var(--muted);font-size:.82rem}.shogi-hand-piece.is-selected{border-color:var(--accent);box-shadow:0 0 0 3px #0f766e29;color:var(--accent-strong)}.shogi-hand-piece:disabled{cursor:default;opacity:1}.shogi-board{background:#94612f;border:8px solid #5f3b1f;border-radius:var(--radius);display:grid;gap:2px;grid-template-columns:repeat(5,minmax(0,1fr));margin-inline:auto;padding:2px;width:min(100%,520px)}.shogi-cell{align-items:center;aspect-ratio:1;background:#f3c883;border:1px solid rgba(95,59,31,.35);border-radius:3px;cursor:pointer;display:inline-flex;justify-content:center;min-width:0;padding:4px;position:relative}.shogi-cell.has-computer{background:#edbd73}.shogi-cell.is-selected{box-shadow:inset 0 0 0 4px #2563eb5c}.shogi-cell.is-legal:after{background:#0f766ec7;border-radius:999px;bottom:7px;content:"";height:10px;position:absolute;right:7px;width:10px}.shogi-cell.is-check{background:#fecaca}.shogi-cell:disabled{cursor:default;opacity:1}.shogi-piece{align-items:center;background:#fff8e8;border:1px solid rgba(95,59,31,.42);border-radius:7px 7px 10px 10px;box-shadow:0 2px 3px #1f293329;color:#2b2118;display:grid;height:82%;justify-items:center;line-height:1;min-width:0;padding:4px 2px;width:78%}.shogi-piece strong{font-size:clamp(1.35rem,8vw,2rem)}.shogi-piece.is-computer{background:#edf5f3;border-color:#0f766e59;transform:rotate(180deg)}.shogi-hand-piece.is-computer strong{display:inline-block;transform:rotate(180deg)}.shogi-history-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);display:grid;gap:10px;padding:12px}.shogi-history-panel h2{color:var(--muted);font-size:.95rem;margin:0}.shogi-kifu-list{display:grid;gap:6px;list-style:none;margin:0;max-height:180px;overflow:auto;padding:0}.shogi-kifu-list li{align-items:center;background:var(--surface-soft);border:1px solid var(--line);border-radius:6px;display:grid;gap:10px;grid-template-columns:2.4rem minmax(0,1fr);padding:7px 10px}.shogi-kifu-list span{color:var(--muted);font-size:.84rem;font-weight:800}.shogi-kifu-list strong{color:var(--ink);font-size:1rem}.shogi-kifu-empty{color:var(--muted);font-weight:800}.light-cell{background:#e2e8f0}.light-cell.is-on{background:#facc15;border-color:#d97706;box-shadow:0 0 0 4px #facc152e}.hitblow-form{display:grid;gap:14px}.hitblow-input{font-size:1.6rem;font-weight:900;letter-spacing:.18em;text-align:center}.hitblow-history{display:grid;gap:10px;list-style:none;margin:0;padding:0}.hitblow-history li{align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);display:grid;gap:6px 12px;grid-template-columns:minmax(86px,auto) minmax(0,1fr) auto;padding:10px 12px}.hitblow-history small{color:var(--muted);font-weight:800}.hitblow-digits{background:var(--surface-soft);border-radius:6px;color:var(--accent-strong);font-family:Courier New,Courier,monospace;font-size:1.15rem;font-weight:900;padding:4px 8px;text-align:center}.sudoku-controls{display:grid;gap:14px}.sudoku-board{background:var(--accent-strong);border:2px solid var(--accent-strong);display:grid;gap:0;grid-template-columns:repeat(9,minmax(0,1fr));margin:0 auto;width:min(100%,520px)}.sudoku-cell{aspect-ratio:1;background:#fff;border:1px solid #c9d4dc;border-radius:0;color:var(--accent-strong);font:inherit;font-size:clamp(1rem,5vw,1.55rem);font-weight:900;min-height:0;padding:0;text-align:center}.sudoku-cell.is-row-edge{border-bottom-color:var(--accent-strong);border-bottom-width:3px}.sudoku-cell.is-column-edge{border-right-color:var(--accent-strong);border-right-width:3px}.sudoku-cell.is-given{background:var(--surface-soft);color:var(--ink)}.sudoku-cell.is-error{background:#fee2e2;color:var(--danger)}.sudoku-cell.is-complete:not(.is-given){background:var(--success-bg);color:var(--success)}.viral-game-shell{touch-action:manipulation}.viral-stage{align-items:center;background:linear-gradient(180deg,#f8fafc,#edf5f3);border:1px solid var(--line);border-radius:var(--radius);display:grid;gap:16px;justify-items:center;min-height:360px;overflow:hidden;padding:18px;position:relative;text-align:center;touch-action:none}.viral-result{align-items:center;background:#ffffffe6;border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);display:flex;flex-wrap:wrap;gap:10px 12px;font-weight:900;justify-content:center;min-height:44px;padding:10px 14px;width:min(100%,520px)}.viral-result-text{min-width:0}.x-share-link{background:#111827;border-radius:999px;color:#fff;display:inline-flex;font-size:.84rem;font-weight:900;line-height:1;min-height:34px;padding:10px 14px;text-decoration:none;white-space:nowrap}.x-share-link:hover,.x-share-link:focus-visible{background:#0f766e;color:#fff}.ten-stop-face{align-items:center;aspect-ratio:1;background:#1f2933;border:0;border-radius:50%;color:#fff;cursor:pointer;display:inline-flex;flex-direction:column;font:inherit;height:min(68vw,260px);justify-content:center}.ten-stop-face span{font-size:clamp(2.4rem,14vw,4.7rem);font-weight:900;line-height:1}.ten-stop-face small{color:#d7e0e5;font-weight:800;margin-top:12px}.viral-stage.is-time-hidden .ten-stop-face{animation:tempo-wobble .62s infinite alternate}.split-task{color:var(--accent-strong);font-size:clamp(1.5rem,8vw,2.4rem);font-weight:900}.split-line{background:#1f2933;border-radius:999px;cursor:crosshair;height:18px;position:relative;width:min(100%,620px)}.split-mark{background:#b42318;border-radius:999px;height:78px;position:absolute;top:50%;transform:translate(-50%,-50%);width:5px}.viral-stage.is-exploded .split-line{animation:pop-shake .45s ease both;background:#b42318}.center-canvas{background:#fff;border:1px solid var(--line);border-radius:var(--radius);max-width:100%}.balloon-wrap{align-items:end;display:grid;min-height:230px;place-items:center}.balloon{background:radial-gradient(circle at 34% 28%,#fecaca,#ef4444 58%,#b91c1c);border-radius:48% 48% 52% 52%;box-shadow:inset -18px -20px 24px #00000024;height:110px;transform-origin:50% 100%;transition:transform .05s linear;width:92px}.balloon.is-danger{animation:pop-shake .11s infinite}.balloon.is-popped{background:#7f1d1d;clip-path:polygon(50% 0,62% 38%,100% 44%,67% 62%,82% 100%,50% 76%,20% 100%,33% 62%,0 43%,38% 38%);transform:scale(1.5)}.ice-arena{background:linear-gradient(135deg,#e0f2fe,#f8fafc);border:1px solid #bae6fd;border-radius:var(--radius);height:min(58vh,420px);max-height:420px;min-height:300px;position:relative;width:min(100%,680px)}.ice-player,.ice-goal{border-radius:50%;position:absolute;transform:translate(-50%,-50%)}.ice-player{background:#0f766e;box-shadow:0 12px 20px #0f766e3d;height:28px;width:28px}.ice-goal{background:#facc15;border:5px solid #d97706;height:56px;width:56px}.pizza-scene{align-items:end;display:grid;justify-items:center;min-height:280px;position:relative;width:min(100%,420px)}.pizza-base{background:radial-gradient(circle,#fbbf24,#f97316);border:8px solid #b45309;border-radius:50% 50% 42% 42%;color:#7c2d12;font-weight:900;height:118px;padding-top:42px;text-transform:uppercase;width:230px}.cheese-strand{background:linear-gradient(90deg,#fde68a,#facc15,#fde68a);border-radius:999px;bottom:88px;height:30px;position:absolute;transform-origin:50% 100%;width:36px}.cheese-handle{background:#fff7ed;border:2px solid #f59e0b;border-radius:999px;color:#92400e;cursor:grab;font:inherit;font-weight:900;padding:10px 18px;position:absolute;bottom:132px;z-index:2}.pizza-scene.is-cheese-broken .cheese-strand{background:repeating-linear-gradient(180deg,#facc15 0 20px,transparent 20px 34px)}.phone-grid{display:grid;gap:12px;grid-template-columns:repeat(4,minmax(0,1fr));width:min(100%,430px)}.app-icon{aspect-ratio:1;background:linear-gradient(135deg,#dbeafe,#fff);border:1px solid var(--line);border-radius:18px;cursor:pointer;display:grid;font:inherit;font-weight:900;place-items:center;position:relative}.app-icon em{background:#dc2626;border-radius:999px;color:#fff;font-size:.74rem;font-style:normal;min-width:26px;padding:2px 6px;position:absolute;right:-5px;top:-7px}.app-icon.is-hot{animation:pop-shake .16s infinite}.viral-stage.is-notification-danger{background:#fee2e2}.sticker-board{background:#d1d5db;border:1px solid #9ca3af;border-radius:var(--radius);height:230px;position:relative;width:min(100%,420px)}.sticker,.sticker-glue{border-radius:var(--radius);height:138px;left:56px;position:absolute;top:46px;width:min(72%,300px)}.sticker{background:linear-gradient(135deg,#fff,#fef3c7);border:2px solid #f59e0b;box-shadow:0 12px 22px #1f293329}.sticker-glue{background:repeating-linear-gradient(45deg,#ffffffe6 0 9px,#cbd5e1e6 9px 18px);opacity:0}.sticker-tab{background:#fefce8;border:2px solid #f59e0b;border-radius:999px;cursor:grab;font:inherit;font-weight:900;padding:7px 10px;position:absolute;right:-18px;top:-18px}.viral-stage.is-torn .sticker{clip-path:polygon(0 0,72% 0,63% 32%,76% 54%,60% 100%,0 100%)}.phone-balance{align-items:center;display:grid;min-height:280px;perspective:700px;place-items:center}.falling-phone{align-items:center;background:#111827;border:10px solid #374151;border-radius:28px;color:#d2f5ef;display:flex;font-size:1.5rem;font-weight:900;height:230px;justify-content:center;line-height:1.15;transform-origin:50% 95%;width:135px}.viral-stage.is-face-hit{background:#111827;color:#fff}.toaster{align-items:center;background:#334155;border-radius:30px 30px 14px 14px;display:grid;height:210px;justify-items:center;padding:28px;width:min(100%,360px)}.toast{--toast: 0;background:linear-gradient(rgba(120,53,15,calc(var(--toast) * .7)),rgba(120,53,15,calc(var(--toast) * .7))),#fef3c7;border:7px solid #f59e0b;border-radius:42px 42px 14px 14px;height:150px;width:190px}.toast-stop{background:#b42318;border:0;border-radius:999px;color:#fff;cursor:pointer;font:inherit;font-size:1.2rem;font-weight:900;min-height:54px;padding:12px 28px}.viral-stage.is-burnt .toast{background:#111827;border-color:#000}.stroop-stage{background:linear-gradient(135deg,rgba(15,45,89,.12),transparent 30%),linear-gradient(315deg,rgba(96,113,124,.14),transparent 30%),#f5f7f8;gap:clamp(12px,2vw,18px);min-height:500px}.stroop-track{height:clamp(270px,44vh,390px);overflow:visible;perspective:900px;position:relative;width:min(100%,620px)}.stroop-card{align-items:center;border:1px solid rgba(255,255,255,.65);border-radius:var(--radius);box-shadow:0 22px 56px #0f1f3d29;display:grid;isolation:isolate;left:50%;min-height:clamp(210px,34vh,310px);opacity:var(--alpha, 1);overflow:hidden;place-items:center;position:absolute;top:50%;transform:translate(calc(-50% + var(--x, 0px)),calc(-50% + var(--y, 0px))) scale(var(--scale, 1));transition:opacity .17s ease,transform .17s ease,box-shadow .17s ease;width:min(74vw,330px);z-index:var(--z, 1)}.stroop-card.is-left-color{background:linear-gradient(145deg,#173f76,var(--accent))}.stroop-card.is-right-color{background:linear-gradient(145deg,#7a8790,#5d6d78)}.stroop-card.is-out-of-range{pointer-events:none}.stroop-card.is-active{box-shadow:0 28px 68px #0f1f3d3d}.stroop-glow{background:radial-gradient(circle at 20% 30%,rgba(255,255,255,.78),transparent 28%),radial-gradient(circle at 78% 70%,rgba(255,255,255,.42),transparent 30%);filter:blur(8px);inset:10%;opacity:.8;position:absolute;z-index:-1}.stroop-prompt{color:#fff;font-size:clamp(6.5rem,28vw,15rem);font-weight:900;line-height:.9;margin:0;opacity:0;text-shadow:0 8px 34px rgba(31,23,18,.24);transition:opacity .12s ease;user-select:none}.stroop-card.is-active .stroop-prompt{opacity:1}.stroop-card.pop .stroop-prompt{animation:stroop-pop .11s ease-out}.stroop-card.correct{animation:stroop-correct .18s ease-out}.stroop-card.wrong{animation:pop-shake .22s ease-out}.stroop-controls{display:grid;gap:clamp(10px,2vw,16px);grid-template-columns:repeat(2,minmax(0,1fr));width:min(100%,620px)}.stroop-answer{border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 14px 30px #0f1f3d1a;cursor:pointer;display:grid;font:inherit;gap:6px;min-height:clamp(88px,14svh,132px);overflow:hidden;padding:14px;place-items:center;position:relative;touch-action:manipulation;transition:filter .12s ease,transform .12s ease,box-shadow .12s ease}.stroop-answer:before{border:1px solid rgba(255,255,255,.65);border-radius:calc(var(--radius) - 2px);content:"";inset:8px;position:absolute}.stroop-answer span,.stroop-answer small{position:relative}.stroop-answer span{font-size:clamp(2.8rem,11vw,5.3rem);font-weight:900;line-height:1}.stroop-answer small{color:#ffffffc7;font-size:.78rem;font-weight:800}.stroop-answer-left{background:linear-gradient(145deg,#173f76,var(--accent));color:#fff}.stroop-answer-right{background:linear-gradient(145deg,#7a8790,#5d6d78);color:#fff}.stroop-answer:hover,.stroop-answer:focus-visible{box-shadow:0 18px 38px #0f1f3d26;filter:saturate(1.08)}.stroop-answer:active{transform:translateY(2px) scale(.992)}.stroop-answer:disabled{cursor:default;filter:saturate(.7)}.stroop-result{align-items:center;background:#ffffffeb;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 12px 28px #2820141f;color:var(--ink);display:flex;flex-wrap:wrap;font-size:clamp(1.1rem,4vw,1.6rem);font-weight:900;gap:10px 12px;justify-content:center;padding:12px 16px;width:min(100%,620px)}.stroop-result[hidden]{display:none}.stroop-result.missed{color:#b42318}@keyframes tempo-wobble{0%{transform:rotate(-1.5deg) scale(1)}to{transform:rotate(1.5deg) scale(1.03)}}@keyframes stroop-pop{0%{transform:scale(.92)}}@keyframes stroop-correct{50%{box-shadow:0 22px 56px #28201429,0 0 0 8px #1d9a7038}}@keyframes pop-shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}@media(min-width:680px){.cards-grid,.related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(min-width:900px){.hero-grid,.calculator-layout,.game-layout{grid-template-columns:minmax(0,1fr) minmax(300px,.52fr)}.cards-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.footer-grid{grid-template-columns:1.2fr 1fr}.metric-grid,.dual-calculator{grid-template-columns:repeat(2,minmax(0,1fr))}.utility-metric-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.full-span{grid-column:1 / -1}.article-section-heading{grid-template-columns:minmax(0,1fr) minmax(260px,.7fr)}}@media(min-width:1120px){.site-main{align-items:start;display:grid;gap:22px;grid-template-columns:minmax(0,1fr) 240px;margin:0 auto;width:min(100% - 32px,1380px)}.site-main>.main-primary .section,.site-main>.main-primary .header-inner,.site-main>.main-primary .footer-inner{width:min(100%,var(--content))}.category-sidebar{background:#fffffff5;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);display:grid;gap:14px;max-height:calc(100vh - 120px);overflow:auto;padding:16px;position:sticky;top:92px}.category-sidebar section{border-top:1px solid var(--line);padding-top:12px}.category-sidebar section:first-of-type{border-top:0;padding-top:0}.sidebar-title,.category-sidebar h2{font-size:.86rem;line-height:1.3;margin:0}.sidebar-title{color:var(--muted);font-weight:900;text-transform:uppercase}.category-sidebar nav{display:grid;gap:6px;margin-top:8px}.category-sidebar a{border-radius:6px;color:var(--ink);font-size:.9rem;font-weight:800;padding:6px 8px;text-decoration:none}.category-sidebar a:hover{background:var(--surface-soft);color:var(--accent-strong)}}@media(max-width:520px){.site-nav,.button{width:100%}.ranked-item{grid-template-columns:36px minmax(0,1fr)}.ranked-item small{grid-column:2}}