/* Taylan Özgür Demirkaya — kişisel site · v1 (7 Kas 2026) */
:root{
  --bg:#0a0b0e; --bg-2:#0f1116; --panel:#13161c; --panel-2:#181c24;
  --ink:#f4f5f7; --ink-2:#c9cdd6; --muted:#8f96a3;
  --line:rgba(255,255,255,.10); --line-2:rgba(255,255,255,.18);
  --accent:#5fb3ff; --accent-2:#39d3e6; --accent-ink:#0a0b0e;
  --glow:rgba(63,150,255,.28); --glow-2:rgba(57,211,230,.16);
  --radius:22px; --radius-s:14px;
  --max:1200px; --gutter:24px;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --serif:"Playfair Display",Georgia,"Times New Roman",serif;
  color-scheme:dark;
}
:root[data-theme="light"]{
  --bg:#f5f6f8; --bg-2:#eef0f3; --panel:#ffffff; --panel-2:#f7f8fa;
  --ink:#121419; --ink-2:#2b2f38; --muted:#5d6470;
  --line:rgba(10,12,20,.10); --line-2:rgba(10,12,20,.18);
  --accent:#1765d8; --accent-2:#0b9eb3; --accent-ink:#ffffff;
  --glow:rgba(23,101,216,.16); --glow-2:rgba(11,158,179,.12);
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
a:hover{color:var(--accent)}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0;line-height:1.1;letter-spacing:-.02em;font-weight:600}
h2{font-size:clamp(30px,4.2vw,46px)}
h3{font-size:clamp(20px,2.2vw,24px);letter-spacing:-.01em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.muted{color:var(--muted)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin-bottom:18px}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent)}
.lead{font-size:clamp(18px,1.6vw,21px);color:var(--ink-2);max-width:62ch}
.sec{padding:clamp(72px,9vw,120px) 0;border-top:1px solid var(--line)}
.sec-head{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:end;margin-bottom:48px}
.sec-head .lead{margin:0}
@media (max-width:860px){.sec-head{grid-template-columns:1fr;gap:16px;margin-bottom:36px}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:12px;white-space:nowrap;padding:14px 22px;border-radius:999px;border:1px solid var(--line-2);
  background:transparent;color:var(--ink);font:inherit;font-weight:500;font-size:16px;cursor:pointer;transition:border-color .2s,background .2s,transform .2s,color .2s}
.btn:hover{border-color:var(--accent);color:var(--ink);transform:translateY(-1px)}
.btn .ic{width:34px;height:34px;border-radius:50%;background:var(--ink);color:var(--bg);display:grid;place-items:center;flex:none;transition:transform .2s}
.btn:hover .ic{transform:rotate(45deg)}
.btn .ic svg{width:15px;height:15px}
.btn-solid{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn-solid:hover{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn-solid .ic{background:var(--bg);color:var(--ink)}
.btn-sm{padding:10px 16px;font-size:14.5px}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:color-mix(in srgb,var(--bg) 78%,transparent);border-bottom:1px solid var(--line)}
.nav .wrap{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:72px;gap:16px}
.nav-links{display:flex;gap:clamp(14px,1.8vw,26px);font-size:15px;color:var(--ink-2)}
.nav-links a{position:relative;padding:6px 0;white-space:nowrap}
.nav-links a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;background:var(--accent);transition:right .25s}
.nav-links a:hover::after{right:0}
.brand{font-family:var(--serif);font-weight:500;font-size:20px;letter-spacing:.16em;text-transform:uppercase;white-space:nowrap;text-align:center}
.brand:hover{color:var(--ink)}
.nav-right{display:flex;justify-content:flex-end;align-items:center;gap:10px}
.lang{display:inline-flex;border:1px solid var(--line-2);border-radius:999px;overflow:hidden;font-size:13px;font-weight:600;letter-spacing:.06em}
.lang a{padding:7px 11px;color:var(--muted)}
.lang a[aria-current="true"]{background:var(--ink);color:var(--bg)}
.lang a:hover{color:var(--ink)}
.lang a[aria-current="true"]:hover{color:var(--bg)}
.icon-btn{width:40px;height:40px;border-radius:50%;border:1px solid var(--line-2);background:transparent;color:var(--ink);display:grid;place-items:center;cursor:pointer}
.icon-btn:hover{border-color:var(--accent)}
.icon-btn svg{width:18px;height:18px}
.burger{display:none}
:root[data-theme="light"] .sun{display:none}
:root:not([data-theme="light"]) .moon{display:none}
@media (max-width:960px){
  .nav .wrap{grid-template-columns:auto 1fr auto;height:64px}
  .brand{text-align:left;font-size:17px;letter-spacing:.14em;order:-1}
  .nav-links{position:fixed;inset:64px 0 auto 0;flex-direction:column;gap:0;background:var(--bg);border-bottom:1px solid var(--line);
    padding:8px var(--gutter) 16px;transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;font-size:18px}
  .nav-links a{padding:12px 0;border-bottom:1px solid var(--line)}
  .nav-links a:last-child{border-bottom:0}
  .nav.open .nav-links{opacity:1;transform:none;pointer-events:auto}
  .burger{display:grid}
  .nav-cta{display:none}
}
@media (max-width:520px){
  .nav .wrap{gap:10px}
  .brand{font-size:15px;letter-spacing:.1em}
  #themeBtn{display:none}
  .lang a{padding:6px 9px;font-size:12px}
}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;isolation:isolate}
.hero-bg{position:absolute;inset:0;z-index:-2;background:
  radial-gradient(1100px 600px at 82% 18%,var(--glow),transparent 60%),
  radial-gradient(700px 500px at 10% 95%,var(--glow-2),transparent 60%),
  var(--bg)}
.hero-bg::after{content:"";position:absolute;inset:0;background:url("../assets/hero-bg.jpg") center/cover no-repeat;opacity:.22;filter:saturate(.9)}
:root[data-theme="light"] .hero-bg::after{opacity:.10}
.hero-bg::before{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,transparent 40%,var(--bg) 100%)}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding-top:clamp(40px,7vw,96px);padding-bottom:clamp(40px,6vw,72px);min-height:calc(100vh - 72px)}
.hero h1{font-size:clamp(38px,5.4vw,74px);font-weight:600;letter-spacing:-.03em;line-height:1.05;max-width:16ch}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero .sub{margin:28px 0 36px;max-width:48ch;font-size:clamp(17px,1.5vw,20px);color:var(--ink-2)}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}
.photo-card{position:relative;border:1px solid var(--line-2);border-radius:var(--radius);overflow:hidden;aspect-ratio:4/5;
  background:var(--panel);box-shadow:0 30px 80px rgba(0,0,0,.45),0 0 0 1px rgba(255,255,255,.03) inset}
:root[data-theme="light"] .photo-card{box-shadow:0 30px 80px rgba(20,30,60,.18)}
.photo-card img{width:100%;height:100%;object-fit:cover;object-position:50% 18%}
.photo-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,0) 55%,rgba(5,6,10,.92) 100%)}
.photo-cap{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:26px 24px 28px;text-align:center;color:#fff}
.photo-cap b{display:block;font-size:clamp(22px,2.4vw,30px);font-weight:600;letter-spacing:-.02em}
.photo-cap span{display:block;color:rgba(255,255,255,.75);font-size:14.5px;margin-top:4px}
@media (max-width:960px){
  .hero .wrap{grid-template-columns:1fr;gap:32px;min-height:0;padding-top:40px}
  .hero h1{max-width:none}
  .photo-card{aspect-ratio:4/5;max-width:520px;margin:0 auto}
}

/* ---------- stats ---------- */
.stats{border-top:1px solid var(--line);background:var(--bg)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-top:36px;padding-bottom:36px}
.stat{text-align:center}
.stat b{display:block;font-size:clamp(30px,3.4vw,44px);font-weight:600;letter-spacing:-.03em;line-height:1}
.stat span{display:block;margin-top:8px;color:var(--muted);font-size:14.5px}
@media (max-width:760px){.stats .wrap{grid-template-columns:repeat(2,1fr);gap:28px 16px}}

/* ---------- about ---------- */
.about{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:start}
.about .prose p{color:var(--ink-2)}
.about .prose p+p{margin-top:.2em}
.timeline{list-style:none;margin:28px 0 0;padding:0;border-left:1px solid var(--line-2)}
.timeline li{position:relative;padding:0 0 18px 26px;color:var(--ink-2)}
.timeline li::before{content:"";position:absolute;left:-5px;top:9px;width:9px;height:9px;border-radius:50%;background:var(--accent)}
.timeline b{color:var(--ink);font-weight:600;margin-right:8px;font-variant-numeric:tabular-nums}
.aside-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.aside-card+.aside-card{margin-top:18px}
.aside-card h3{font-size:14px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:600;margin-bottom:16px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}
.chips li{padding:8px 13px;border:1px solid var(--line-2);border-radius:999px;font-size:14.5px;color:var(--ink-2)}
.questions{margin:0;padding:0;list-style:none;counter-reset:q}
.questions li{counter-increment:q;position:relative;padding:10px 0 10px 36px;border-top:1px solid var(--line);color:var(--ink-2)}
.questions li:first-child{border-top:0;padding-top:0}
.questions li::before{content:counter(q,decimal-leading-zero);position:absolute;left:0;top:10px;color:var(--accent);font-weight:600;font-size:13px;letter-spacing:.06em}
.questions li:first-child::before{top:0}
@media (max-width:960px){.about{grid-template-columns:1fr;gap:36px}}

/* ---------- cards grid ---------- */
.grid{display:grid;gap:18px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media (max-width:1060px){.grid-4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.grid-4,.grid-2{grid-template-columns:1fr}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:28px;display:flex;flex-direction:column;gap:14px;transition:border-color .2s,transform .2s}
.card:hover{border-color:var(--accent);transform:translateY(-2px)}
.card .num{font-family:var(--serif);font-size:15px;letter-spacing:.14em;color:var(--accent)}
.card h3{font-size:21px}
.card p{color:var(--ink-2);margin:0;font-size:16px}
.card .tags{margin-top:auto;padding-top:6px;color:var(--muted);font-size:13.5px}
.card-ico{width:44px;height:44px;border-radius:12px;background:var(--panel-2);border:1px solid var(--line);display:grid;place-items:center;color:var(--accent)}
.card-ico svg{width:22px;height:22px}

/* ---------- badegem ---------- */
.quote{font-family:var(--serif);font-weight:500;font-size:clamp(24px,3vw,36px);line-height:1.25;letter-spacing:-.01em;max-width:28ch;margin:0 0 40px}
.quote em{font-style:italic;color:var(--accent)}
.spiral{counter-reset:s}
.layers{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:18px}
.layer{border:1px dashed var(--line-2);border-radius:var(--radius-s);padding:16px 18px;font-size:15px;color:var(--ink-2)}
.layer b{display:block;color:var(--ink);margin-bottom:4px}
@media (max-width:1060px){.layers{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.layers{grid-template-columns:1fr}}
.badegem-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:40px;align-items:center}
.note{font-size:14px;color:var(--muted)}

/* ---------- publications ---------- */
.pubs{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.pubs li{display:grid;grid-template-columns:90px 1fr auto;gap:20px;align-items:start;padding:22px 0;border-bottom:1px solid var(--line)}
.pubs .yr{font-variant-numeric:tabular-nums;color:var(--accent);font-weight:600;padding-top:2px}
.pubs .ti{font-weight:600;font-size:18px;letter-spacing:-.01em}
.pubs .me{color:var(--muted);font-size:15px;margin-top:4px}
.pubs .me a{text-decoration:underline;text-decoration-color:var(--line-2);text-underline-offset:3px}
.pubs .tag{padding:6px 11px;border:1px solid var(--line-2);border-radius:999px;font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);white-space:nowrap}
.pubs .soon .tag{border-style:dashed}
@media (max-width:700px){.pubs li{grid-template-columns:1fr;gap:6px}.pubs .tag{justify-self:start}}
.pub-group{margin-top:48px}
.pub-group h3{font-size:14px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}

/* ---------- writing ---------- */
.posts{list-style:none;margin:0;padding:0}
.posts li{border-top:1px solid var(--line);padding:16px 0}
.posts li:last-child{border-bottom:1px solid var(--line)}
.posts a{display:block;font-weight:500;font-size:17px;line-height:1.35}
.posts time{display:block;color:var(--muted);font-size:13.5px;margin-top:4px;font-variant-numeric:tabular-nums}
.col h3{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:16px}
.col h3 small{font-size:14px;color:var(--muted);font-weight:500}
.more{display:inline-block;margin-top:18px;font-weight:500;color:var(--accent)}
.more:hover{text-decoration:underline;text-underline-offset:4px}

/* ---------- talks ---------- */
.video{position:relative;aspect-ratio:16/9;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:#000;cursor:pointer}
.video img{width:100%;height:100%;object-fit:cover;opacity:.85;transition:opacity .2s,transform .4s}
.video:hover img{opacity:1;transform:scale(1.02)}
.video .play{position:absolute;inset:0;display:grid;place-items:center}
.video .play span{width:72px;height:72px;border-radius:50%;background:rgba(255,255,255,.92);color:#000;display:grid;place-items:center;box-shadow:0 10px 40px rgba(0,0,0,.5)}
.video .play svg{width:26px;height:26px;margin-left:4px}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video-cap{margin-top:14px}
.video-cap b{display:block;font-weight:600}
.video-cap span{color:var(--muted);font-size:14.5px}
.band{margin-top:56px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);position:relative;aspect-ratio:21/9;min-height:280px}
.band img{width:100%;height:100%;object-fit:cover;object-position:50% 30%}
.band::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,6,10,.88) 0%,rgba(5,6,10,.35) 55%,rgba(5,6,10,0) 100%)}
.band-txt{position:absolute;z-index:2;left:clamp(24px,5vw,56px);bottom:clamp(24px,5vw,48px);max-width:30ch;color:#fff}
.band-txt b{display:block;font-size:clamp(22px,2.6vw,32px);letter-spacing:-.02em;line-height:1.15;font-weight:600}
.band-txt span{display:block;margin-top:8px;color:rgba(255,255,255,.78)}
@media (max-width:640px){.band{aspect-ratio:4/5}.band::after{background:linear-gradient(0deg,rgba(5,6,10,.92) 0%,rgba(5,6,10,.2) 60%)}}

/* ---------- contact ---------- */
.contact{position:relative;overflow:hidden}
.contact .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.contact h2{font-size:clamp(36px,5vw,64px);letter-spacing:-.03em}
.contact .email{display:inline-block;font-size:clamp(18px,2vw,24px);font-weight:500;margin:22px 0 28px;text-decoration:underline;text-decoration-color:var(--line-2);text-underline-offset:6px}
.contact .email:hover{text-decoration-color:var(--accent)}
.socials{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin:0;padding:0}
.socials a{display:inline-flex;align-items:center;gap:10px;padding:12px 16px;border:1px solid var(--line-2);border-radius:999px;font-size:15px;transition:border-color .2s}
.socials a:hover{border-color:var(--accent)}
.socials svg{width:17px;height:17px}
.contact-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:32px}
.contact-card h3{margin-bottom:12px}
.contact-card ul{margin:0;padding:0 0 0 18px;color:var(--ink-2)}
.contact-card li+li{margin-top:6px}
@media (max-width:900px){.contact .wrap{grid-template-columns:1fr}}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--muted);font-size:14px}
.foot .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}
.foot a:hover{color:var(--accent)}

/* ---------- reveal ---------- */
.js .rv{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.js .rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.js .rv{opacity:1;transform:none;transition:none}}

/* ---------- BADEGEM sayfası ---------- */
.page-hero{padding:clamp(56px,8vw,96px) 0 clamp(32px,5vw,56px)}
.page-hero h1{font-size:clamp(34px,5vw,64px);letter-spacing:-.03em;line-height:1.05;max-width:18ch}
.page-hero h1 em{font-style:normal;color:var(--accent)}
.page-hero .sub{margin:22px 0 0;max-width:60ch;font-size:clamp(17px,1.5vw,20px);color:var(--ink-2)}
.diagram{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(18px,3vw,36px)}
.diagram svg{width:100%;height:auto;display:block;font-family:var(--sans)}
.diagram .cap{margin:16px 0 0;color:var(--muted);font-size:14.5px;text-align:center}
.d-ink{fill:var(--ink)} .d-muted{fill:var(--muted)} .d-accent{fill:var(--accent)}
.d-line{stroke:var(--line-2);fill:none} .d-arrow{stroke:var(--accent);fill:none}
.d-node{fill:var(--panel-2);stroke:var(--line-2)} .d-node-a{fill:var(--accent);stroke:var(--accent)}
.d-ring{fill:none;stroke:var(--line-2);stroke-dasharray:7 5}
.d-fill-1{fill:color-mix(in srgb,var(--accent) 7%,var(--panel))} .d-fill-2{fill:color-mix(in srgb,var(--accent) 14%,var(--panel))} .d-fill-3{fill:color-mix(in srgb,var(--accent) 24%,var(--panel))}
.two{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}
@media (max-width:900px){.two{grid-template-columns:1fr}}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;margin-top:8px}
.steps::before{content:"";position:absolute;left:8%;right:8%;top:22px;height:2px;background:linear-gradient(90deg,var(--line-2),var(--accent))}
.step{position:relative;padding:0 14px;text-align:center}
.step .dot{width:46px;height:46px;border-radius:50%;margin:0 auto 14px;display:grid;place-items:center;background:var(--panel);border:2px solid var(--accent);color:var(--accent);font-weight:700;position:relative;z-index:1}
.step:last-child .dot{background:var(--accent);color:var(--accent-ink)}
.step h3{font-size:19px;margin-bottom:6px}
.step p{color:var(--ink-2);font-size:15px;margin:0}
@media (max-width:760px){.steps{grid-template-columns:1fr 1fr;gap:28px 0}.steps::before{display:none}}
.card .lead-sm{font-size:14px;color:var(--accent);font-weight:600;letter-spacing:.06em;text-transform:uppercase}
.kv{list-style:none;margin:0;padding:0}
.kv li{display:grid;grid-template-columns:110px 1fr;gap:12px;padding:8px 0;border-top:1px solid var(--line);font-size:15px;color:var(--ink-2)}
.kv li:first-child{border-top:0}
.kv b{color:var(--muted);font-weight:600;font-size:13px;letter-spacing:.06em;text-transform:uppercase;padding-top:2px}
.grid-3{grid-template-columns:repeat(3,1fr)}
@media (max-width:1000px){.grid-3{grid-template-columns:1fr}}

/* mobil taşma düzeltmesi: uzun düğme etiketi sütunu genişletiyordu */
.hero .wrap>div,.two>*,.grid>*{min-width:0}
@media (max-width:600px){
  .btn{white-space:normal;text-align:left;line-height:1.3}
  .hero-cta .btn{width:100%;justify-content:space-between}
  .hero h1{font-size:clamp(34px,9.6vw,42px);max-width:none;overflow-wrap:anywhere}
  .page-hero h1{font-size:clamp(30px,8.6vw,38px);max-width:none}
}