/* Layout: a physicist's notebook. Hero = a path-integral canvas (career as the stationary path),
   then a vertical "worldline" timeline, then present work, ideas, writing, contact. */
:root{
  --paper:#f2f4f7;
  --surface:#ffffff;
  --ink:#101a2c;
  --muted:#586477;
  --rule:#d3d9e2;
  --accent:#c94f0c;
  --accent-soft:#f6e3d6;
  --f-display:"Newsreader",Georgia,"Times New Roman",serif;
  --f-body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --s-1:.8125rem; --s0:1rem; --s1:1.1875rem; --s2:1.5rem; --s3:2.25rem; --s4:clamp(2.6rem,6.4vw,4.6rem);
  --wrap:1100px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#0b111d; --surface:#111a2b; --ink:#e3e8f1; --muted:#8e9aae; --rule:#22304a;
  --accent:#ff8a3d; --accent-soft:#2a1d14; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#0b111d; --surface:#111a2b; --ink:#e3e8f1; --muted:#8e9aae; --rule:#22304a;
  --accent:#ff8a3d; --accent-soft:#2a1d14; color-scheme:dark}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{background:var(--paper);color:var(--ink);font:400 var(--s0)/1.65 var(--f-body);-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:var(--paper)}
a{color:inherit;text-decoration-color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
::selection{background:var(--accent);color:var(--paper)}

/* language switching */
html:not([data-lang="tr"]) .tr{display:none!important}
html[data-lang="tr"] .en{display:none!important}

.wrap{max-width:var(--wrap);margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.mono{font-family:var(--f-mono)}
.label{font:500 .75rem/1.2 var(--f-mono);letter-spacing:.08em;color:var(--muted)}

/* header */
header.bar{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--rule)}
.bar .wrap{display:flex;align-items:center;gap:20px;height:56px}
.brand{font:500 .95rem var(--f-mono);text-decoration:none;white-space:nowrap}
.brand b{color:var(--accent);font-weight:500}
.brand .cur{display:inline-block;width:.55em;height:1em;vertical-align:-.15em;background:var(--accent);margin-left:2px;animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
nav.links{display:flex;gap:18px;overflow-x:auto;scrollbar-width:none;flex:1;min-width:0}
nav.links::-webkit-scrollbar{display:none}
nav.links a{font:400 .85rem var(--f-mono);color:var(--muted);text-decoration:none;white-space:nowrap;padding:4px 0}
nav.links a:hover,nav.links a.on{color:var(--ink)}
nav.links a.on::before{content:"> ";color:var(--accent)}
.tools{display:flex;gap:6px;margin-left:auto}
.tbtn{font:500 .78rem var(--f-mono);color:var(--ink);background:transparent;border:1px solid var(--rule);border-radius:6px;height:32px;min-width:36px;padding:0 9px;cursor:pointer}
.tbtn:hover{border-color:var(--ink)}
@media (max-width:720px){nav.links{display:none}}

/* hero */
.hero{padding-block:clamp(40px,7vw,88px) 32px}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:clamp(24px,5vw,64px);align-items:center}
@media (max-width:860px){.hero .wrap{grid-template-columns:1fr}}
.prompt{font:400 .9rem/1.6 var(--f-mono);color:var(--muted)}
.prompt .p{color:var(--accent)}
.prompt .out{color:var(--ink)}
h1{font:400 var(--s4)/1.02 var(--f-display);letter-spacing:-.02em;margin:18px 0 18px;text-wrap:balance}
h1 em{font-style:italic;color:var(--accent)}
.lede{font-size:var(--s1);line-height:1.55;max-width:34em;margin:0 0 26px;color:var(--ink)}
.facts{display:flex;flex-wrap:wrap;gap:8px 22px;margin:0;padding:0;list-style:none;font:400 .82rem var(--f-mono);color:var(--muted)}
.facts b{color:var(--ink);font-weight:500}
.figure{margin:0}
.figure canvas{display:block;width:100%;aspect-ratio:5/4;max-width:100%}
.figure figcaption{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid var(--rule);padding-top:10px;margin-top:6px;font-size:var(--s-1);color:var(--muted)}
.figure .eq{font-family:var(--f-display);font-style:italic;font-size:1.05rem;color:var(--ink);white-space:nowrap}

/* sections */
section.sec{padding-block:clamp(48px,7vw,84px);border-top:1px solid var(--rule)}
.sec-head{display:grid;grid-template-columns:200px minmax(0,1fr);gap:24px;margin-bottom:36px;align-items:baseline}
.sec-head h2{font:400 var(--s3)/1.1 var(--f-display);letter-spacing:-.01em;margin:0;text-wrap:balance}
.sec-head p{grid-column:2;margin:10px 0 0;color:var(--muted);max-width:40em}
.body-grid{display:grid;grid-template-columns:200px minmax(0,1fr);gap:24px}
.body-grid > *{grid-column:2;min-width:0}
@media (max-width:720px){.sec-head,.body-grid{grid-template-columns:1fr}.sec-head p,.body-grid > *{grid-column:1}}

/* worldline timeline */
.worldline{list-style:none;margin:0;padding:0;position:relative}
.worldline::before{content:"";position:absolute;left:84px;top:8px;bottom:8px;width:1px;background:var(--rule)}
.worldline li{display:grid;grid-template-columns:72px 24px minmax(0,1fr);gap:0 0;padding:9px 0;align-items:baseline}
.worldline .yr{font:500 .9rem var(--f-mono);font-variant-numeric:tabular-nums;color:var(--muted);text-align:right;padding-right:0}
.worldline .dot{justify-self:center;width:9px;height:9px;border-radius:50%;background:var(--paper);border:1.5px solid var(--muted);transform:translateY(1px);position:relative;z-index:1}
.worldline .txt{max-width:44em}
.worldline .role{padding:18px 0}
.worldline .role .yr{color:var(--accent)}
.worldline .role .dot{width:13px;height:13px;background:var(--accent);border-color:var(--accent)}
.worldline .role h3{font:500 var(--s2)/1.2 var(--f-display);margin:0 0 4px}
.worldline .role .org{font:400 .85rem var(--f-mono);color:var(--muted);margin:0 0 8px}
.worldline .role p{margin:0}
.worldline .now .dot{box-shadow:0 0 0 5px var(--accent-soft)}

/* now */
.focus{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0}
.focus article{padding:4px 24px 4px 0;min-width:0}
.focus article + article{border-left:1px solid var(--rule);padding-left:24px}
@media (max-width:900px){.focus{grid-template-columns:1fr}.focus article{padding:20px 0}.focus article + article{border-left:0;border-top:1px solid var(--rule);padding-left:0}}
.focus .k{font:500 .78rem var(--f-mono);color:var(--accent)}
.focus h3{font:500 1.35rem/1.25 var(--f-display);margin:8px 0 10px;text-wrap:balance}
.focus p{margin:0 0 14px;font-size:.95rem;color:var(--ink)}
.tags{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:0;padding:0}
.tags li{font:400 .74rem var(--f-mono);color:var(--muted);border:1px solid var(--rule);border-radius:4px;padding:2px 7px}
.pipeline{margin-top:36px;overflow-x:auto;border:1px solid var(--rule);border-radius:8px;background:var(--surface);padding:16px 18px}
.pipeline pre{margin:0;font:400 .8rem/1.7 var(--f-mono);color:var(--muted);white-space:pre}
.pipeline pre b{color:var(--ink);font-weight:500}
.pipeline pre i{color:var(--accent);font-style:normal}

/* ideas / toolbox */
.two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 48px}
@media (max-width:720px){.two{grid-template-columns:1fr}}
.idea{border-top:1px solid var(--ink);padding-top:14px}
.idea h3{font:500 1.25rem/1.3 var(--f-display);margin:0 0 6px}
.idea p{margin:0;color:var(--muted);font-size:.95rem}
.kit{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 48px;margin-top:48px}
@media (max-width:720px){.kit{grid-template-columns:1fr}}
.kit dt{margin-bottom:8px}
.kit dd{margin:0;font:400 .9rem/1.8 var(--f-mono)}
.kit dd span:not(:last-child)::after{content:" · ";color:var(--muted)}

/* kızımla yapay zeka sohbetleri */
.series .sec-head h2{font-style:italic}
.motto{margin:0 0 32px;font:400 1.15rem/1.5 var(--f-display);color:var(--muted);max-width:32em}
.ruler-wrap{overflow-x:auto;padding-bottom:6px;scrollbar-width:thin}
.ruler{display:flex;gap:4px;min-width:max-content;align-items:flex-end}
.ruler a,.ruler button{all:unset;box-sizing:border-box;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:6px;width:30px;font:500 .72rem var(--f-mono);font-variant-numeric:tabular-nums;color:var(--muted)}
.ruler .bar{display:block;width:100%;height:var(--h,22px);border-radius:3px 3px 0 0;background:var(--rule);transition:background .15s}
.ruler .has .bar{background:color-mix(in srgb,var(--accent) 35%,var(--rule))}
.ruler .has:hover .bar{background:color-mix(in srgb,var(--accent) 65%,var(--rule))}
.ruler .on{color:var(--accent)}
.ruler .on .bar{background:var(--accent)}
.ruler a:focus-visible,.ruler button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:3px}
.ruler-key{display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;margin:10px 0 0;font:400 .75rem var(--f-mono);color:var(--muted)}
.ruler-key .sw{display:inline-block;width:10px;height:10px;border-radius:2px;background:var(--rule);margin-right:-8px}
.ruler-key .sw.has{background:color-mix(in srgb,var(--accent) 35%,var(--rule))}
.ruler-key .sw.on{background:var(--accent)}
.pick{margin:28px 0 40px;padding:24px 0 0;border-top:1px solid var(--ink)}
.pick-meta{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;font-size:.8rem;color:var(--muted)}
.pick-meta #pickNo{color:var(--accent);font-weight:500}
.chip{border:1px solid var(--rule);border-radius:4px;padding:1px 8px}
.chip:empty{display:none}
.pick-sub{font:400 clamp(1.6rem,3.6vw,2.4rem)/1.2 var(--f-display);font-style:italic;margin:12px 0 16px;max-width:22em;text-wrap:balance}
.pick-sub.q::before{content:"“";color:var(--accent)}
.pick-sub.q::after{content:"”";color:var(--accent)}
.pick-go{font-size:.85rem;font-weight:500}
.layers{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;counter-reset:none}
.layers li{display:flex;flex-direction:column;gap:4px;padding:14px 18px 14px 0;font-size:.88rem;color:var(--muted);min-width:0}
.layers li + li{border-left:1px solid var(--rule);padding-left:18px}
.layers .n{font:500 .75rem var(--f-mono);color:var(--accent)}
.layers b{font-weight:600;color:var(--ink);font-size:.95rem}
@media (max-width:720px){.layers{grid-template-columns:repeat(2,minmax(0,1fr))}.layers li:nth-child(3){border-left:0;padding-left:0}.layers li:nth-child(n+3){border-top:1px solid var(--rule)}}
.series-links{display:flex;flex-wrap:wrap;gap:8px 22px;margin:28px 0 0;font-size:.85rem}
.series-links a{font-weight:500}
.series-links .m{color:var(--muted)}

/* writing */
.posts{list-style:none;margin:0;padding:0}
.posts li{border-bottom:1px solid var(--rule)}
.posts a{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px;align-items:baseline;padding:18px 0;text-decoration:none}
.posts .t{font:400 1.4rem/1.3 var(--f-display)}
.posts a:hover .t{color:var(--accent)}
.posts .d{font:400 .82rem var(--f-mono);color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}
.posts .s{grid-column:1/-1;margin-top:-10px;font-size:.9rem;color:var(--muted)}
.more{display:inline-block;margin-top:22px;font:500 .85rem var(--f-mono)}

/* off-screen */
.offs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
@media (max-width:900px){.offs{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:460px){.offs{grid-template-columns:1fr}}
.off .g{font:400 2rem/1 var(--f-display);font-style:italic;color:var(--accent);display:block;margin-bottom:10px}
.off h3{font:500 1.05rem/1.3 var(--f-body);margin:0 0 4px}
.off p{margin:0;font-size:.9rem;color:var(--muted)}

/* contact */
.contact-line{font:400 clamp(1.8rem,4.2vw,3rem)/1.15 var(--f-display);margin:0 0 32px;max-width:20em;text-wrap:balance}
.socials{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin:0;padding:0}
.socials a{display:inline-flex;gap:10px;align-items:baseline;border:1px solid var(--rule);border-radius:999px;padding:9px 16px;text-decoration:none;font-size:.92rem;background:var(--surface)}
.socials a:hover{border-color:var(--accent)}
.socials .h{font:400 .8rem var(--f-mono);color:var(--muted)}

footer{border-top:1px solid var(--rule);padding-block:28px 40px;font:400 .8rem var(--f-mono);color:var(--muted)}
footer .wrap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .brand .cur{animation:none}
}

/* inner pages */
.page-top{border-top:0;padding-block:clamp(40px,6vw,72px) clamp(56px,8vw,96px)}
.post-head{max-width:46rem;margin:0 auto 40px}
.post-head .back{text-decoration:none}
.post-title{font:400 clamp(2rem,5vw,3.2rem)/1.1 var(--f-display);letter-spacing:-.015em;margin:14px 0 12px;text-wrap:balance}
.post-meta{font-size:.82rem;color:var(--muted);margin:0}
.prose{max-width:46rem;margin:0 auto;font-size:1.05rem;line-height:1.75}
.prose > *{margin-top:0;margin-bottom:1.1em}
.prose h2,.prose h3,.prose h4{font-family:var(--f-display);font-weight:500;line-height:1.25;margin-top:1.8em;text-wrap:balance}
.prose h2{font-size:1.75rem}.prose h3{font-size:1.4rem}.prose h4{font-size:1.15rem}
.prose img,.prose video{max-width:100%;height:auto;border-radius:6px}
.prose figure{margin-left:0;margin-right:0}
.prose figcaption{font-size:.85rem;color:var(--muted);margin-top:6px}
.prose pre{background:var(--surface);border:1px solid var(--rule);border-radius:8px;padding:14px 16px;overflow-x:auto;font:400 .85rem/1.6 var(--f-mono)}
.prose code{font-family:var(--f-mono);font-size:.88em}
.prose :not(pre) > code{background:var(--accent-soft);border-radius:4px;padding:1px 5px}
.prose blockquote{margin-left:0;padding-left:18px;border-left:2px solid var(--accent);color:var(--muted)}
.prose table{border-collapse:collapse;display:block;overflow-x:auto;max-width:100%;font-size:.92rem}
.prose th,.prose td{border-bottom:1px solid var(--rule);padding:8px 12px;text-align:left}
.prose hr{border:0;border-top:1px solid var(--rule);margin:2.4em 0}
.post-nav{max-width:46rem;margin:56px auto 0;padding-top:20px;border-top:1px solid var(--rule);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.85rem}
footer a{color:var(--muted)}
.posts .tg{grid-column:1/-1;margin-top:-6px;font:400 .74rem var(--f-mono);color:var(--muted)}
.posts .tg span:not(:last-child)::after{content:" · "}
.posts .ext{font:400 .8rem var(--f-mono);color:var(--muted);margin-left:6px}
.more-ext{margin-left:22px;color:var(--muted)}