@font-face{font-family:IBM Plex Sans Arabic;font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/ibm-plex-sans-arabic-arabic-400-normal.woff2)format("woff2");unicode-range:U+6??,U+750-77F,U+8A0-8FF,U+FB50-FDFF,U+FE70-FEFF}@font-face{font-family:IBM Plex Sans Arabic;font-style:normal;font-weight:700;font-display:swap;src:url(/fonts/ibm-plex-sans-arabic-arabic-700-normal.woff2)format("woff2");unicode-range:U+6??,U+750-77F,U+8A0-8FF,U+FB50-FDFF,U+FE70-FEFF}:root{color-scheme:light dark;--bg:#fff;--surface:#f5f7fa;--border:#d9dee5;--text:#1a2230;--muted:#566274;--accent:#0b5cad;--accent-text:#fff;--focus:#e08a00;--radius:10px;--content-width:760px;--page-width:1080px;--font-latin:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-arabic:"IBM Plex Sans Arabic", "Segoe UI", Tahoma, system-ui, sans-serif}@media (prefers-color-scheme:dark){:root{--bg:#11161d;--surface:#1a212b;--border:#2d3745;--text:#e8edf3;--muted:#a3afbf;--accent:#6cb2ff;--accent-text:#0b1118;--focus:#ffb347}}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text);font-family:var(--font-latin);flex-direction:column;min-height:100vh;margin:0;line-height:1.65;display:flex}html[lang=ar] body{font-family:var(--font-arabic);line-height:1.85}.lang-switch{font-family:system-ui,Segoe UI,Tahoma,sans-serif}a{color:var(--accent)}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.container{width:100%;max-inline-size:var(--page-width);margin-inline:auto;padding-inline:16px}main{flex:1;padding-block:24px 48px}.prose{max-inline-size:var(--content-width)}h1{margin-block:.4em .6em;font-size:clamp(1.6rem,4vw,2.2rem);line-height:1.25}h2{margin-block:1.6em .5em;font-size:1.35rem;line-height:1.3}h3{font-size:1.1rem}.site-header{border-block-end:1px solid var(--border);background:var(--surface)}.site-header .container{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;min-block-size:56px;display:flex}.brand{color:var(--text);font-size:1.15rem;font-weight:700;text-decoration:none}.header-nav{flex-wrap:wrap;align-items:center;gap:16px;display:flex}.header-nav a{text-decoration:none}.lang-switch{border:1px solid var(--border);color:var(--text);background:var(--bg);border-radius:999px;padding:4px 14px}.site-footer{border-block-start:1px solid var(--border);background:var(--surface);color:var(--muted);padding-block:24px;font-size:.92rem}.footer-links{flex-wrap:wrap;gap:8px 20px;margin:0 0 12px;padding:0;list-style:none;display:flex}.footer-links a{color:var(--text)}.breadcrumbs ol{color:var(--muted);flex-wrap:wrap;gap:4px 8px;margin:0;padding:0;font-size:.9rem;list-style:none;display:flex}.breadcrumbs li:not(:last-child):after{content:"›";margin-inline-start:8px}html[dir=rtl] .breadcrumbs li:not(:last-child):after{content:"‹"}.breadcrumbs a{color:var(--muted)}.card-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;margin:0;padding:0;list-style:none;display:grid}.card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);height:100%;color:var(--text);padding:16px;text-decoration:none;display:block}.card:hover{border-color:var(--accent)}.card strong{color:var(--accent);margin-block-end:4px;display:block}.card span{color:var(--muted);font-size:.93rem}.tool-box{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);margin-block:16px;padding:16px}.trust-note{color:var(--muted);margin-block:8px 0;font-size:.9rem}label{margin-block-end:6px;font-weight:600;display:block}textarea,input,select{font:inherit;color:inherit;background:var(--bg);border:1px solid var(--border);border-radius:8px;inline-size:100%;padding:10px 12px}textarea{resize:vertical;min-block-size:160px}button,.button{font:inherit;cursor:pointer;background:var(--accent);color:var(--accent-text);border:0;border-radius:8px;padding:10px 16px}.ad-slot{text-align:center;min-block-size:var(--ad-min-height,280px);margin-block:24px;display:block;overflow:hidden}.ad-slot small{color:var(--muted);font-size:.75rem;display:block}.faq details{border:1px solid var(--border);border-radius:var(--radius);margin-block:8px;padding:10px 14px}.faq summary{cursor:pointer;font-weight:600}.related-list{flex-wrap:wrap;gap:8px;padding:0;list-style:none;display:flex}.related-list a{border:1px solid var(--border);border-radius:999px;padding:6px 14px;text-decoration:none;display:inline-block}.visually-hidden{clip-path:inset(50%);white-space:nowrap;block-size:1px;inline-size:1px;position:absolute;overflow:hidden}.text-tool textarea+label,.text-tool fieldset+label{margin-block-start:16px}.options{border:1px solid var(--border);border-radius:8px;gap:8px;margin-block:12px 0;padding:8px 14px 12px;display:grid}.options legend{color:var(--muted);padding-inline:6px;font-size:.9rem}.option-check{align-items:center;gap:8px;margin:0;font-weight:400;display:flex}.option-check input{inline-size:auto;margin:0}.option-select select{max-inline-size:320px}.tool-actions{flex-wrap:wrap;gap:8px;margin-block-start:12px;display:flex}button.secondary{color:var(--text);border:1px solid var(--border);background:0 0}button:disabled{opacity:.5;cursor:not-allowed}.stats{grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin:16px 0 0;display:grid}.stats dt{color:var(--muted);font-size:.9rem}.stats dd{margin:0;font-size:1.6rem;font-weight:700}.calc-fields{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;display:grid}.calc-field label{font-size:.95rem}.calc-results{margin-block-start:20px}.calc-heading{margin-block:0 8px;font-size:1.1rem}.calc-rows{gap:8px;margin:0;display:grid}.calc-rows>div{border-block-end:1px solid var(--border);justify-content:space-between;align-items:baseline;gap:16px;padding-block:8px;display:flex}.calc-rows dt{color:var(--muted)}.calc-rows dd{text-align:end;margin:0;font-weight:600}.calc-rows .strong dd{color:var(--accent);font-size:1.5rem}.calc-error{color:#b3261e;margin:0;font-weight:600}@media (prefers-color-scheme:dark){.calc-error{color:#ffb4ab}}.calc-note{color:var(--muted);margin-block:12px 0;font-size:.92rem}.notice{border:1px solid var(--border);border-inline-start:4px solid var(--focus);background:var(--surface);border-radius:8px;margin-block:16px;padding:10px 14px;font-size:.93rem}.game:focus-visible{outline:3px solid var(--focus);outline-offset:4px;border-radius:8px}.game-bar{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:12px 20px;margin-block-end:14px;display:flex}.game-stat span{color:var(--muted);font-size:.85rem;display:block}.game-stat strong{font-size:1.5rem}.game-options{grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;margin-block-end:14px;display:grid}.game-status{text-align:center;color:var(--muted);min-block-size:1.7em;margin-block:12px 0}.dpad{grid-template-rows:repeat(3,48px);grid-template-columns:repeat(3,56px);justify-content:center;gap:6px;margin-block:14px 0;display:grid}.dpad button{padding:0;font-size:1.3rem}.dpad-up{grid-area:1/2}.dpad-left{grid-area:2/1}.dpad-right{grid-area:2/3}.dpad-down{grid-area:3/2}.board-2048{background:var(--border);touch-action:none;border-radius:10px;grid-template-columns:repeat(4,1fr);gap:8px;max-inline-size:420px;margin-inline:auto;padding:8px;display:grid}.tile{aspect-ratio:1;color:#1a1a1a;background:#80808040;border-radius:6px;place-items:center;font-size:clamp(1.1rem,5.5vw,2rem);font-weight:700;display:grid}.t2{background:#eee4da}.t4{background:#ede0c8}.t8{background:#f2b179}.t16{background:#f59563}.t32{background:#f67c5f}.t64{background:#f65e3b}.t128{background:#edcf72;font-size:clamp(1rem,4.6vw,1.7rem)}.t256{background:#edcc61;font-size:clamp(1rem,4.6vw,1.7rem)}.t512{background:#edc850;font-size:clamp(1rem,4.6vw,1.7rem)}.t1024{background:#edc53f;font-size:clamp(.9rem,3.8vw,1.4rem)}.t2048{background:#edc22e;font-size:clamp(.9rem,3.8vw,1.4rem)}.t4096{color:#fff;background:#3c3a32;font-size:clamp(.9rem,3.8vw,1.4rem)}.snake-canvas{aspect-ratio:1;border:1px solid var(--border);touch-action:none;border-radius:8px;inline-size:100%;max-inline-size:400px;margin-inline:auto;display:block}.ttt-board{grid-template-columns:repeat(3,1fr);gap:8px;max-inline-size:320px;margin-inline:auto;display:grid}.ttt-cell{aspect-ratio:1;background:var(--bg);color:var(--text);border:2px solid var(--border);padding:0;font-size:2.6rem;font-weight:700}.ttt-cell:disabled{opacity:1;cursor:default}.ttt-cell.x{color:var(--accent)}.ttt-cell.o{color:#c5221f}@media (prefers-color-scheme:dark){.ttt-cell.o{color:#ff8a80}}.ttt-cell.win{background:var(--accent);color:var(--accent-text)}.memory-grid{grid-template-columns:repeat(var(--cols,4), 1fr);gap:8px;max-inline-size:440px;margin-inline:auto;display:grid}.memory-card{aspect-ratio:1;border:2px solid #0000;padding:0;font-size:clamp(1.4rem,7vw,2.4rem)}.memory-card.up{background:var(--bg);color:var(--text);border-color:var(--border)}.memory-card.matched{border-color:#1e8e3e}