/* Dr. Alper Özbilen — ozbilen.net */
:root{
  --bg:#F6F6F1; --paper:#FFFFFF; --ink:#14172B; --body:#33374F; --muted:#454965;
  --mono:#6A6E88; --line:rgba(20,23,43,.14); --line-strong:rgba(20,23,43,.25);
  --accent:#2A56C6; --accent:oklch(.5 .18 262); --accent-soft:oklch(.72 .14 262);
  --sans:'IBM Plex Sans',system-ui,-apple-system,'Segoe UI',sans-serif;
  --display:'Space Grotesk',var(--sans); --code:'IBM Plex Mono',ui-monospace,monospace;
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--ink);text-decoration:none}
a:hover,a:focus-visible{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
h1,h2,h3{margin:0;font-family:var(--display);letter-spacing:-.015em;text-wrap:pretty}
p{margin:0;text-wrap:pretty}
ol,ul{margin:0;padding:0;list-style:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:24px;width:100%}
.wrap--narrow{max-width:880px}
.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--bg);padding:12px 18px;z-index:200}
.skip:focus{left:8px;top:8px}
.mono{font-family:var(--code);font-size:12px;letter-spacing:.16em;color:var(--mono);text-transform:uppercase}
.mono--accent{color:var(--accent)}
.dots{background-image:radial-gradient(rgba(20,23,43,.10) 1px,transparent 1px);background-size:28px 28px}
.dots--dark{background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);background-size:28px 28px}
.rule{border-bottom:1px solid var(--line)}

/* header */
.site-head{position:sticky;top:0;z-index:100;background:rgba(246,246,241,.93);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.site-head__bar{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px}
.site-head__logo img{height:40px;width:auto;object-fit:contain}
.nav{display:flex;align-items:center;gap:28px}
.nav a{font-size:14px;padding:4px 0;border-bottom:2px solid transparent}
.nav a:hover{color:var(--accent)}
.nav a[aria-current="page"]{font-weight:600;color:var(--accent);border-bottom-color:var(--accent)}
.lang{font-family:var(--code);font-size:12px;letter-spacing:.1em;border:1px solid var(--line-strong);padding:5px 10px}
.lang:hover{border-color:var(--accent)}
.burger{display:none;background:none;border:1px solid var(--line-strong);padding:9px 12px;cursor:pointer;font-family:var(--code);font-size:12px;letter-spacing:.1em;color:var(--ink);min-height:44px}
.nav-mobile{display:none;flex-direction:column;border-top:1px solid var(--line);background:var(--bg);padding:4px 24px 16px}
.nav-mobile a{font-size:16px;padding:14px 0;border-bottom:1px solid rgba(20,23,43,.08)}
.nav-mobile a[aria-current="page"]{font-weight:600;color:var(--accent)}
.nav-mobile[data-open="true"]{display:flex}
@media (max-width:960px){.nav{display:none}.burger{display:block}}

/* hero + sections */
.section{padding-block:clamp(48px,7vw,80px)}
.section--tight{padding-block:clamp(40px,6vw,64px)}
.hero{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:clamp(32px,5vw,56px);align-items:center;padding-block:clamp(48px,8vw,96px)}
.stack{display:flex;flex-direction:column;gap:22px}
.stack--sm{gap:14px}
.hero h1{font-size:clamp(32px,5vw,60px);line-height:1.08;font-weight:700;letter-spacing:-.02em}
.lede{font-size:clamp(16px,1.6vw,18px);line-height:1.7;color:var(--body);max-width:58ch}
.sub{font-size:15px;line-height:1.7;color:var(--muted);max-width:58ch}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:6px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:12px 26px;font-size:14px;font-weight:500;border:1px solid transparent}
.btn--solid{background:var(--ink);color:var(--bg)}
.btn--solid:hover{background:var(--accent);color:#fff}
.btn--ghost{border-color:var(--line-strong);color:var(--ink)}
.btn--ghost:hover{border-color:var(--accent);color:var(--accent)}
.portrait{position:relative;justify-self:center;width:min(100%,420px)}
.portrait::before,.portrait::after{content:"+";position:absolute;font-family:var(--code);font-size:16px;color:var(--accent)}
.portrait::before{top:-14px;left:-14px}.portrait::after{bottom:-14px;right:-14px}
.portrait__frame{border:1px solid rgba(20,23,43,.2);background:var(--paper);padding:12px;aspect-ratio:4/5}
.portrait__frame img{width:100%;height:100%;object-fit:cover}
.portrait__cap{margin-top:10px;text-align:right}
.page-head{padding-block:clamp(48px,7vw,80px)}
.page-head h1{font-size:clamp(32px,5vw,56px);font-weight:700;letter-spacing:-.02em}
.split{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px 64px;align-items:start}
.section-title{font-size:clamp(24px,3vw,36px);font-weight:700}

/* focus grid */
.grid-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,420px),1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.card{background:var(--bg);padding:32px 28px;display:flex;flex-direction:column;gap:14px}
.card:hover{background:var(--paper)}
.card h3{font-size:21px;line-height:1.3;font-weight:500}
.card__lead{font-size:15px;line-height:1.6;color:var(--ink);font-weight:500}
.card__body{font-size:14px;line-height:1.65;color:var(--muted)}
.card--wide{grid-column:1/-1}

/* dark band */
.band{background:var(--ink);color:#F6F6F1;padding-block:clamp(56px,8vw,96px)}
.band h2{color:#F6F6F1;font-size:clamp(24px,3.4vw,40px);line-height:1.2;font-weight:700;max-width:26ch}
.band p{color:#B8BACC}
.band .mono{color:#8B8EA6}
.qlist li{display:flex;gap:24px;align-items:baseline;padding:22px 4px;border-top:1px solid rgba(255,255,255,.14)}
.qlist span{font-family:var(--code);font-size:13px;letter-spacing:.1em;color:var(--accent-soft);flex-shrink:0}
.qlist p{font-size:clamp(15px,1.6vw,17px);line-height:1.65;color:#E8E9F0}

/* article list */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.filters button{font-family:var(--code);font-size:11px;letter-spacing:.12em;padding:10px 14px;min-height:40px;cursor:pointer;border:1px solid var(--line-strong);background:transparent;color:var(--ink)}
.filters button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#fff}
.list{display:flex;flex-direction:column}
.list__item{border-bottom:1px solid var(--line);padding:26px 8px;display:flex;flex-direction:column;gap:10px}
.list__item:hover{background:var(--paper)}
.list__meta{display:flex;flex-wrap:wrap;gap:16px;font-family:var(--code);font-size:11px;letter-spacing:.14em;color:var(--mono)}
.list__meta .n{color:var(--accent)}
.list__item h2,.list__item h3{font-size:clamp(18px,2.2vw,24px);line-height:1.3;font-weight:500}
.list__item p{font-size:14px;line-height:1.65;color:var(--muted);max-width:78ch}
.more{font-family:var(--code);font-size:11px;letter-spacing:.14em;margin-top:2px}

/* prose */
.prose{display:flex;flex-direction:column;gap:22px;max-width:68ch}
.prose p{font-size:16px;line-height:1.8;color:var(--body)}
.prose .intro{font-size:18px;line-height:1.8;color:var(--ink);font-weight:500}
.prose h2{font-size:24px;font-weight:500;border-top:1px solid var(--line);padding-top:26px;margin-top:12px}
blockquote{margin:0;border-left:2px solid var(--accent);padding:6px 0 6px 24px;font-family:var(--display);font-size:clamp(19px,2.4vw,21px);line-height:1.5}
blockquote footer{margin-top:10px;font-family:var(--code);font-size:11px;letter-spacing:.16em;color:var(--mono)}
.bio-layout{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:clamp(32px,5vw,56px);align-items:start}
.bio-sec{display:flex;flex-direction:column;gap:14px;border-top:1px solid var(--line);padding-top:26px}
.bio-sec h2{font-size:24px;font-weight:500}
.bio-sec p{font-size:16px;line-height:1.75;color:var(--body)}
.bullet{display:flex;gap:14px;align-items:baseline;border:1px solid var(--line);background:var(--paper);padding:14px 18px}
.bullet span{font-family:var(--code);font-size:11px;letter-spacing:.1em;color:var(--accent);flex-shrink:0}
.bullet p{font-size:15px;line-height:1.6;color:var(--body)}
.aside{display:flex;flex-direction:column;gap:24px;position:sticky;top:96px}
.facts{margin:0;display:flex;flex-direction:column;border:1px solid var(--line);background:var(--paper)}
.facts>div{padding:16px 20px;border-bottom:1px solid rgba(20,23,43,.08);display:flex;flex-direction:column;gap:4px}
.facts dt{font-family:var(--code);font-size:10px;letter-spacing:.16em;color:var(--mono)}
.facts dd{margin:0;font-size:14px;font-weight:500;line-height:1.5}
@media (max-width:860px){.aside{position:static}}

/* gallery */
.tabs{display:flex;gap:10px;margin-top:6px}
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:28px 24px}
.video{margin:0;display:flex;flex-direction:column;gap:10px}
.video__frame{position:relative;border:1px solid rgba(20,23,43,.2);background:var(--ink);aspect-ratio:16/9;overflow:hidden}
.video__frame iframe{width:100%;height:100%;border:0;display:block}
.video__btn{position:absolute;inset:0;width:100%;height:100%;padding:0;border:0;background:transparent;cursor:pointer;display:flex;align-items:center;justify-content:center}
.video__btn img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.video__play{position:relative;width:60px;height:60px;border-radius:50%;background:rgba(20,23,43,.72);border:1px solid rgba(255,255,255,.45);color:#fff;font-size:20px;display:flex;align-items:center;justify-content:center}
.video__btn:hover .video__play{background:var(--accent)}
.video figcaption{display:flex;flex-direction:column;gap:8px}
.video__title{font-family:var(--display);font-size:16px;line-height:1.35;font-weight:500}
.video__meta{display:flex;justify-content:space-between;gap:12px;align-items:baseline;font-family:var(--code);font-size:11px;letter-spacing:.12em;color:var(--mono)}
.video__meta a{color:var(--mono);flex-shrink:0}
.video__meta a:hover{color:var(--accent)}

/* contact */
.form{display:flex;flex-direction:column;gap:20px;max-width:640px}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-family:var(--code);font-size:11px;letter-spacing:.16em;color:var(--mono)}
.field input,.field textarea{border:1px solid var(--line-strong);background:var(--paper);padding:14px 16px;font-family:var(--sans);font-size:16px;color:var(--ink);min-height:48px;border-radius:0}
.field textarea{resize:vertical;min-height:150px}
.field input:focus,.field textarea:focus{outline:2px solid var(--accent);outline-offset:-1px}
.linklist{display:flex;flex-direction:column;border:1px solid var(--line);background:var(--paper)}
.linklist>p{padding:20px 24px 12px}
.linklist a{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 24px;border-top:1px solid rgba(20,23,43,.08);font-size:15px;font-weight:500;min-height:52px}
.linklist a:hover{background:var(--bg);color:var(--accent)}
.notice{border:1px solid var(--line);background:var(--paper);padding:22px 24px;font-size:15px;line-height:1.7;color:var(--muted)}

/* footer */
.site-foot{background:var(--ink);color:#B8BACC;margin-top:auto}
.site-foot a{color:#B8BACC;font-size:14px}
.site-foot a:hover{color:#fff}
.site-foot__top{display:flex;flex-wrap:wrap;gap:40px;justify-content:space-between;align-items:flex-start;padding-block:56px 32px}
.site-foot img{height:56px;width:auto;align-self:flex-start;object-fit:contain}
.site-foot__col{display:flex;flex-direction:column;gap:10px;min-width:150px}
.site-foot__about{display:flex;flex-direction:column;gap:16px;max-width:320px}
.site-foot__about p{font-size:14px;line-height:1.6;color:#8B8EA6}
.site-foot .mono{color:#6A6E88}
.site-foot__bot{border-top:1px solid rgba(255,255,255,.1)}
.site-foot__bot div{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;padding-block:20px;font-family:var(--code);font-size:11px;letter-spacing:.08em;color:#6A6E88}
.page{display:flex;flex-direction:column;min-height:100vh}
@media (max-width:600px){.wrap{padding-inline:18px}.card{padding:26px 20px}.qlist li{gap:16px}}
@media print{.site-head,.site-foot,.filters,.tabs{display:none}body{background:#fff}}

/* photo gallery */
.photo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.photo{margin:0;border:1px solid rgba(20,23,43,.2);background:var(--paper);padding:10px;display:flex;flex-direction:column;gap:10px}
.photo img{width:100%;aspect-ratio:4/3;object-fit:cover;object-position:center 28%}
.photo figcaption{font-family:var(--code);font-size:11px;letter-spacing:.12em;color:var(--mono);display:flex;justify-content:space-between;gap:12px}
.subhead{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap}

/* video lightbox */
.lb{position:fixed;inset:0;z-index:300;background:rgba(10,11,22,.92);display:flex;align-items:center;justify-content:center;padding:24px}
.lb[hidden]{display:none}
.lb__inner{width:min(1200px,100%);display:flex;flex-direction:column;gap:14px}
.lb__frame{position:relative;width:100%;aspect-ratio:16/9;background:#000;border:1px solid rgba(255,255,255,.18)}
.lb__frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.lb__bar{display:flex;justify-content:space-between;align-items:center;gap:16px;color:#E8E9F0}
.lb__meta{display:flex;flex-direction:column;gap:6px}
.lb__watch{font-family:var(--code);font-size:11px;letter-spacing:.12em;color:#B8BACC}
.lb__watch:hover{color:#fff}
.lb__title{font-family:var(--display);font-size:clamp(15px,2vw,19px);font-weight:500;line-height:1.35}
.lb__close{flex-shrink:0;background:transparent;border:1px solid rgba(255,255,255,.45);color:#fff;font-family:var(--code);font-size:12px;letter-spacing:.12em;padding:10px 16px;min-height:44px;cursor:pointer}
.lb__close:hover{background:rgba(255,255,255,.12)}
body.lb-open{overflow:hidden}
@media (max-width:600px){.lb{padding:12px}}

/* articles v2 */
.searchbox{display:flex;align-items:center;gap:12px;max-width:520px;border:1px solid var(--line-strong);background:var(--paper);padding:0 16px;margin-top:6px}
.searchbox span{font-size:17px;color:var(--mono)}
.searchbox input{flex:1;border:0;background:transparent;padding:14px 0;font-family:var(--sans);font-size:16px;color:var(--ink)}
.searchbox input:focus{outline:none}
.searchbox:focus-within{outline:2px solid var(--accent);outline-offset:-1px}
.art-card{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px 40px;align-items:center;border:1px solid var(--line);background:var(--paper);padding:24px}
.art-card:hover{border-color:var(--accent)}
.art-card__img{display:block;border:1px solid rgba(20,23,43,.2)}
.art-card__img img{width:100%;aspect-ratio:16/9;object-fit:cover}
.art-card__body{display:flex;flex-direction:column;gap:12px}
.art-card__body h2{font-size:clamp(20px,2.4vw,26px);line-height:1.25;font-weight:500}
.art-card__body>p{font-size:15px;line-height:1.65;color:var(--muted);max-width:68ch}
.list__meta .src,.art-meta .src{color:var(--mono);text-decoration:underline;text-underline-offset:3px}
.list__meta .src:hover,.art-meta .src:hover{color:var(--accent)}
.art-meta{display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center;font-family:var(--code);font-size:11px;letter-spacing:.14em;color:var(--mono)}
.art-meta .n{color:var(--accent)}
.tts{font-family:var(--code);font-size:11px;letter-spacing:.12em;border:1px solid var(--line-strong);background:transparent;color:var(--ink);padding:10px 16px;min-height:40px;cursor:pointer}
.tts:hover{border-color:var(--accent);color:var(--accent)}
.tts[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#fff}
.art-cover{width:100%;aspect-ratio:16/9;object-fit:cover;border:1px solid rgba(20,23,43,.2)}
.prose .em{font-size:17px;line-height:1.75;color:var(--ink);font-weight:500;border-left:2px solid var(--accent);padding-left:20px}
.numlist{display:flex;flex-direction:column;gap:10px}
.numlist li{display:flex;gap:14px;align-items:baseline;border:1px solid var(--line);background:var(--paper);padding:14px 18px}
.numlist span{font-family:var(--code);font-size:11px;letter-spacing:.1em;color:var(--accent);flex-shrink:0}
.numlist p{font-size:15px;line-height:1.6;color:var(--body)}
.art-foot{border-top:1px solid var(--line);margin-top:20px;padding-top:24px;display:flex;flex-direction:column;gap:18px}
.art-foot .mono{text-transform:uppercase}
.share-row{display:flex;flex-wrap:wrap;gap:10px}
.share{border:1px solid var(--line-strong);background:transparent;padding:10px 18px;min-height:40px;display:inline-flex;align-items:center;font-family:var(--sans);font-size:13px;font-weight:500;color:var(--ink);cursor:pointer}
.share:hover{border-color:var(--accent);color:var(--accent)}
.art-foot__bot{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center}

/* gündem / basın */
.press-row{display:flex;flex-wrap:wrap;gap:8px 32px;align-items:baseline;justify-content:space-between;border-bottom:1px solid var(--line);padding:24px 8px;color:var(--ink);text-decoration:none}
.press-row:hover{background:var(--paper)}
.press-row__body{display:flex;flex-direction:column;gap:8px;min-width:min(100%,480px);flex:1}
.press-row__meta{display:flex;gap:16px;font-family:var(--code);font-size:11px;letter-spacing:.14em;color:var(--mono)}
.press-row__meta .n{color:var(--accent)}
.press-row__title{font-family:var(--display);font-size:20px;line-height:1.35;font-weight:500;text-wrap:pretty}
.press-row__src{font-family:var(--code);font-size:11px;letter-spacing:.12em;color:var(--mono)}
.press-row__go{font-family:var(--code);font-size:11px;letter-spacing:.14em;color:var(--accent);flex-shrink:0}
/* soru arşivi */
.q-archive{border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.04);margin-top:8px}
.q-archive summary{cursor:pointer;padding:16px 20px;font-family:var(--code);font-size:12px;letter-spacing:.16em;color:#B8BACC;list-style:none}
.q-archive summary::-webkit-details-marker{display:none}
.q-archive>div{padding:4px 20px 18px;display:flex;flex-direction:column;gap:10px}
.q-archive p{margin:0;display:flex;gap:16px;align-items:baseline;font-size:14px;color:#E8E9F0}
.q-archive p span{font-family:var(--code);font-size:11px;letter-spacing:.12em;color:#8FA6F0;flex-shrink:0}
.q-archive .q-archive__note{font-size:13px;color:#8B8EA6}
/* düşünce haritası */
.mindmap{background:#14172B;color:#F6F6F1;background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);background-size:28px 28px;border-top:1px solid var(--line)}
.mindmap__center{display:inline-flex;align-items:center;border:1px solid #8FA6F0;color:#AAB8F2;padding:10px 22px;font-family:var(--code);font-size:12px;letter-spacing:.16em;margin:4px 0 8px}
.mindmap__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,340px),1fr));gap:12px;width:100%;text-align:left}
.concept{border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.04)}
.concept summary{cursor:pointer;padding:16px 18px;display:flex;align-items:baseline;gap:12px;font-family:var(--display);font-size:16px;font-weight:500;color:#F6F6F1;list-style:none}
.concept summary::-webkit-details-marker{display:none}
.concept summary span{font-family:var(--code);font-size:10px;letter-spacing:.12em;color:#8FA6F0;flex-shrink:0}
.concept p{margin:0;padding:0 18px 16px 44px;font-size:14px;line-height:1.65;color:#B8BACC;text-wrap:pretty}

/* anasayfa kare portre */
.portrait .portrait__frame{aspect-ratio:1/1}