:root{--bg:#fff;--surface:#f4f5f7;--fg:#14161a;--muted:#5b6270;--border:#e2e5ea;--accent:#2563eb;--accent-fg:#fff;--accent-2:#f59e0b;--font-sans:system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-display:var(--font-sans);--radius:12px;--maxw:1120px;--measure:68ch;--gutter:clamp(16px, 4vw, 32px);color-scheme:light dark}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}body{background:var(--bg);color:var(--fg);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;margin:0;font-size:1.0625rem;line-height:1.65;overflow-x:hidden}img,svg,video,iframe{max-width:100%;height:auto;display:block}h1,h2,h3,h4{font-family:var(--font-display);text-wrap:balance;margin:0 0 .5em;line-height:1.15}p{text-wrap:pretty;margin:0 0 1em}a{color:var(--accent);text-underline-offset:.18em}a:hover{text-decoration-thickness:2px}:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.container{width:min(100% - 2 * var(--gutter), var(--maxw));margin-inline:auto}.prose{max-width:var(--measure)}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link{z-index:100;background:var(--accent);color:var(--accent-fg);border-radius:8px;padding:8px 14px;position:absolute;top:8px;left:-9999px}.skip-link:focus{left:8px}.breadcrumbs ol{color:var(--muted);flex-wrap:wrap;gap:.25rem .5rem;margin:0 0 1rem;padding:0;font-size:.875rem;list-style:none;display:flex}.breadcrumbs li+li:before{content:"›";opacity:.6;margin-right:.5rem}.breadcrumbs a{color:inherit}.yt{aspect-ratio:16/9;border-radius:var(--radius);background:#000;position:relative;overflow:hidden}.yt iframe,.yt-play,.yt-play img{border:0;width:100%;height:100%;position:absolute;inset:0}.yt-play{cursor:pointer;background:0 0;padding:0}.yt-play img{object-fit:cover}.yt-icon{transition:transform .15s;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.yt-play:hover .yt-icon{transform:translate(-50%,-50%)scale(1.08)}.waitlist{gap:.6rem;max-width:520px;display:grid}.waitlist-row{flex-wrap:wrap;gap:.5rem;display:flex}.waitlist input[type=email]{min-width:0;font:inherit;border:1px solid var(--border);background:var(--surface);color:var(--fg);border-radius:10px;flex:220px;padding:.8rem 1rem}.waitlist button{font:inherit;background:var(--accent);color:var(--accent-fg);cursor:pointer;border:0;border-radius:10px;padding:.8rem 1.3rem;font-weight:600}.waitlist button:disabled{opacity:.6;cursor:progress}.waitlist-consent{color:var(--muted);align-items:flex-start;gap:.5rem;font-size:.85rem;display:flex}.waitlist-consent input{margin-top:.3rem}.waitlist-msg{min-height:1.4em;margin:0;font-size:.9rem}.hp{position:absolute;left:-9999px}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}}@font-face{font-family:Inter;src:url(/fonts/Inter-Regular.woff2)format("woff2");font-weight:400;font-display:swap}@font-face{font-family:Inter;src:url(/fonts/Inter-SemiBold.woff2)format("woff2");font-weight:600;font-display:swap}@font-face{font-family:Bricolage Grotesque;src:url(/fonts/BricolageGrotesque-Bold.woff2)format("woff2");font-weight:700;font-display:swap}@font-face{font-family:Bricolage Grotesque;src:url(/fonts/BricolageGrotesque-ExtraBold.woff2)format("woff2");font-weight:800;font-display:swap}:root{--bg:#0b1020;--surface:#121a33;--surface-2:#18223f;--fg:#e9edf7;--muted:#a3adc6;--border:#243055;--accent:#4cc9f0;--accent-fg:#0b1020;--accent-2:#f8961e;--font-sans:"Inter", system-ui, -apple-system, "Segoe UI", sans-serif;--font-display:"Bricolage Grotesque", "Inter", system-ui, sans-serif;color-scheme:dark}h1,h2,h3{letter-spacing:-.01em;font-weight:800}h1{font-size:clamp(2rem,5vw,3.4rem)}h2{margin-top:2.2em;font-size:clamp(1.4rem,3vw,1.9rem)}h3{font-size:1.2rem}strong{font-weight:600}.site-header{z-index:20;background:color-mix(in srgb, var(--bg) 88%, transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);position:sticky;top:0}.site-header .container{align-items:center;gap:1rem;min-height:64px;display:flex}.brand{color:var(--fg);font-family:var(--font-display);letter-spacing:.04em;white-space:nowrap;align-items:center;gap:.6rem;font-weight:800;text-decoration:none;display:flex}.brand svg{flex:none}.nav{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:.25rem 1.1rem;margin-left:auto;display:flex}.nav a:not(.btn){color:var(--muted);font-size:.95rem;font-weight:600;text-decoration:none}.nav a:not(.btn):hover,.nav a[aria-current=page]{color:var(--fg)}.btn{border:1px solid #0000;border-radius:999px;align-items:center;gap:.5rem;padding:.7rem 1.2rem;font-weight:600;text-decoration:none;display:inline-flex}.btn-primary{background:var(--accent);color:var(--accent-fg)}.btn-ghost{border-color:var(--border);color:var(--fg)}.btn-yt{background:var(--accent-2);color:#1a0e00}.btn:hover{filter:brightness(1.08)}.nav .btn{padding:.45rem .95rem;font-size:.9rem}@media (width<=640px){.site-header .container{flex-wrap:wrap;gap:.4rem;padding-block:.6rem}.nav{justify-content:flex-start;width:100%;margin-left:0}.nav .btn{display:none}}.grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:1.25rem;display:grid}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);color:inherit;flex-direction:column;text-decoration:none;transition:transform .15s,border-color .15s;display:flex;overflow:hidden}.card:hover{border-color:var(--accent);transform:translateY(-3px)}.card img{aspect-ratio:16/9;object-fit:cover;background:var(--surface-2);width:100%}.card-body{gap:.4rem;padding:1rem 1.1rem 1.2rem;display:grid}.card-title{font-family:var(--font-display);margin:0;font-size:1.12rem;font-weight:700;line-height:1.25}.card-meta{color:var(--muted);flex-wrap:wrap;align-items:center;gap:.6rem;font-size:.85rem;display:flex}.badge{letter-spacing:.04em;text-transform:uppercase;background:var(--surface-2);color:var(--muted);border:1px solid var(--border);border-radius:999px;padding:.15rem .55rem;font-size:.72rem;font-weight:600;display:inline-block}.badge-accent{color:var(--accent);border-color:color-mix(in srgb, var(--accent) 45%, transparent)}.badge-orange{color:var(--accent-2);border-color:color-mix(in srgb, var(--accent-2) 45%, transparent)}.section{padding-block:clamp(2.5rem,7vw,5rem)}.section-head{flex-wrap:wrap;justify-content:space-between;align-items:end;gap:1rem;margin-bottom:1.5rem;display:flex}.section-head h2{margin:0}.lead{color:var(--muted);max-width:60ch;font-size:clamp(1.1rem,2.2vw,1.3rem)}.eyebrow{color:var(--accent);letter-spacing:.12em;text-transform:uppercase;margin-bottom:.8rem;font-size:.8rem;font-weight:600}.panel{background:var(--surface);border:1px solid var(--border);border-radius:calc(var(--radius) + 4px);padding:clamp(1.25rem,4vw,2.5rem)}.answer{border-left:4px solid var(--accent);background:var(--surface);border-radius:0 var(--radius) var(--radius) 0;margin:1.5rem 0;padding:1.1rem 1.3rem;font-size:1.1rem}.answer-label{color:var(--accent);letter-spacing:.1em;text-transform:uppercase;margin-bottom:.3rem;font-size:.8rem;font-weight:600;display:block}.formula{font-family:var(--font-display);text-align:center;border:1px dashed var(--accent-2);color:var(--accent-2);border-radius:var(--radius);padding:1.2rem;font-size:clamp(1.2rem,3vw,1.6rem);font-weight:700}figure{margin:1.5rem 0 2rem}figure img{border-radius:var(--radius);width:100%}figcaption{color:var(--muted);margin-top:.45rem;font-size:.82rem}.site-footer{border-top:1px solid var(--border);color:var(--muted);margin-top:4rem;padding-block:2.5rem;font-size:.92rem}.site-footer .container{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;display:grid}.site-footer a{color:var(--fg);text-decoration:none}.site-footer a:hover{text-decoration:underline}.site-footer ul{gap:.35rem;margin:0;padding:0;list-style:none;display:grid}.site-footer h2{letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 0 .6rem;font-size:.85rem}.ders{padding-top:2rem}.ders-head{max-width:820px;margin-bottom:2rem}.ders-badges{margin-bottom:.8rem}.ders-outcomes{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);margin-top:1rem;padding:.6rem 1rem}.ders-outcomes summary{cursor:pointer;font-weight:600}.ders-outcomes ul{color:var(--muted);margin:.6rem 0 .2rem;padding-left:1.2rem}.ders-body{max-width:760px;font-size:1.1rem}.ders-body h2{margin-top:2.4em}.ders-body table{border-collapse:collapse;width:100%;margin:1.2rem 0 1.6rem;font-size:.98rem}.ders-body th,.ders-body td{text-align:left;border-bottom:1px solid var(--border);vertical-align:top;padding:.55rem .7rem}.ders-body th{color:var(--accent);font-weight:600}.ders-body li{margin-bottom:.35em}.ders-video{margin-top:2.5rem}.ders-foot{border-top:1px solid var(--border);color:var(--muted);max-width:760px;margin-top:3rem;padding-top:1.5rem;font-size:.95rem}.ders-foot h2{letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:1.5rem 0 .6rem;font-size:1rem}.ders-links{gap:.35rem;padding:0;list-style:none;display:grid}.ders-meta ol{padding-left:1.2rem}.ders-policy{font-size:.85rem}.tahmin{background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--accent-2);border-radius:var(--radius);margin:1.5rem 0 2rem;padding:1.1rem 1.3rem 1rem}.tahmin .eyebrow{color:var(--accent-2);margin-bottom:.4rem}.tahmin fieldset{border:0;margin:0;padding:0}.tahmin legend{margin-bottom:.8rem;padding:0;font-size:1.08rem;font-weight:600}.tahmin-ops,.test-ops{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:.5rem;display:grid}.test-ops{grid-template-columns:1fr}.tahmin-op,.test-op{border:1px solid var(--border);cursor:pointer;background:var(--surface-2);border-radius:10px;align-items:center;gap:.6rem;padding:.55rem .8rem;display:flex}.tahmin-op:has(input:checked),.test-op:has(input:checked){border-color:var(--accent)}.tahmin-op.is-correct,.test-op.is-correct{background:color-mix(in srgb, #5ad67d 14%, var(--surface-2));border-color:#5ad67d}.test-op.is-wrong{background:color-mix(in srgb, #ff6b6b 12%, var(--surface-2));border-color:#ff6b6b}.tahmin-actions,.test-actions{flex-wrap:wrap;align-items:center;gap:1rem;margin-top:.9rem;display:flex}.tahmin-hint,.test-fb{color:var(--muted);margin:0;font-size:.92rem}.tahmin-result.is-ok,.test-fb.is-ok{color:#5ad67d}.tahmin-result{margin:0 0 .3rem;font-weight:600}.tahmin-answer{border-top:1px dashed var(--border);margin-top:1rem;padding-top:.8rem}.tahmin-answer p:last-child{margin-bottom:0}.btn[disabled]{opacity:.5;cursor:not-allowed}.btn-ghost{background:0 0}.sim{background:var(--surface);border:1px solid var(--border);border-radius:calc(var(--radius) + 4px);margin:1.5rem 0 2.5rem;overflow:hidden}.sim-head{border-bottom:1px solid var(--border);gap:.2rem;padding:1rem 1.2rem .8rem;display:grid}.sim-head .eyebrow{margin:0}.sim-head strong{font-family:var(--font-display);font-size:1.15rem}.sim-desc{color:var(--muted);font-size:.92rem}.sim-canvas{background:var(--bg);place-items:center;min-height:240px;display:grid}.sim-canvas canvas{touch-action:none;display:block}.sim-noscript{color:var(--muted);text-align:center;padding:2rem}.sim-ui{gap:1.2rem;padding:1rem 1.2rem 1.2rem;display:grid}.sim-controls{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));align-items:end;gap:.7rem 1.4rem;display:grid}.sim-control{grid-template-columns:1fr auto;gap:.15rem .6rem;font-size:.92rem;display:grid}.sim-control-name{color:var(--muted);font-weight:600}.sim-control-value{font-variant-numeric:tabular-nums;color:var(--accent);text-align:right;font-weight:600}.sim-control input[type=range]{width:100%;accent-color:var(--accent);grid-column:1/-1;min-height:28px}.sim-control.is-check{color:var(--fg);grid-template-columns:auto 1fr;align-items:center;min-height:44px}.sim-control.is-check input{width:18px;height:18px;accent-color:var(--accent)}.sim-reset{border:1px solid var(--border);color:var(--fg);font:inherit;cursor:pointer;background:0 0;border-radius:999px;place-self:center start;min-height:40px;padding:.5rem 1rem;font-weight:600}.sim-reset:hover{border-color:var(--accent)}.sim-readouts{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:.6rem;margin:0;display:grid}.sim-readouts dt{color:var(--muted);letter-spacing:.04em;text-transform:uppercase;font-size:.8rem}.sim-readouts dd{font-variant-numeric:tabular-nums;margin:0;font-size:1.05rem;font-weight:600}.sim-tasks h3{letter-spacing:.1em;text-transform:uppercase;color:var(--accent-2);margin:0 0 .5rem;font-size:.85rem}.sim-tasks ol{gap:.4rem;margin:0;padding-left:1.3rem;font-size:.95rem;display:grid}.sim-tasks li.is-done{color:var(--muted);text-decoration:line-through}.sim-tasks li.is-done::marker{color:#5ad67d}.sim-tasks-status{color:#5ad67d;margin:.6rem 0 0;font-size:.92rem;font-weight:600}.ornek{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);margin:1.5rem 0;padding:1.1rem 1.3rem}.ornek h3{flex-wrap:wrap;align-items:center;gap:.6rem;margin:0 0 .7rem;font-size:1.1rem;display:flex}.ornek-no{color:var(--accent)}.ornek-soru p:last-child{margin-bottom:.6rem}.ornek-cozum summary{cursor:pointer;color:var(--accent);font-weight:600}.ornek-cozum-body{border-top:1px dashed var(--border);margin-top:.7rem;padding-top:.7rem}.ornek-cozum-body p:last-child{margin-bottom:0}.formul-box{margin:2rem 0}.formul-box .eyebrow{margin-bottom:.5rem}.formul-aciklama{color:var(--muted);margin:.8rem 0 0;font-size:.95rem}.test{max-width:760px;margin-top:3rem}.test-note{color:var(--muted)}.test-list{gap:1.2rem;padding:0;list-style:none;display:grid}.test-q{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.1rem 1.3rem}.test-q fieldset{border:0;margin:0;padding:0}.test-q legend{margin-bottom:.8rem;padding:0;font-size:1.05rem;font-weight:600}.test-no{color:var(--accent)}.test-harf{color:var(--accent-2);min-width:1.2em;font-weight:700}.test-explain{border-top:1px dashed var(--border);color:var(--muted);margin-top:.9rem;padding-top:.8rem;font-size:.98rem}.test-summary{flex-wrap:wrap;align-items:center;gap:1rem;margin-top:1.5rem;font-size:1.05rem;display:flex}