:root{
  --bg:#f5f7fb;
  --surface:#ffffff;
  --ink:#142033;
  --muted:#667085;
  --line:#e7ebf2;
  --accent:#2563eb;
  --accent-2:#06b6d4;
  --dark:#0b1220;
  --radius:20px;
  --shadow:0 18px 55px rgba(15,23,42,.08);
  --max:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.72}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(calc(100% - 40px),var(--max));margin:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(18px);border-bottom:1px solid rgba(231,235,242,.85)}
.nav{min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:30px}
.brand img{width:185px;height:auto}
.nav-links{display:flex;align-items:center;gap:8px}
.nav-links a{padding:10px 15px;border-radius:12px;font-size:14px;font-weight:700;color:#344054}
.nav-links a:hover,.nav-links a.active{background:#eef4ff;color:var(--accent)}
.menu-btn{display:none;border:0;background:#eef4ff;border-radius:12px;padding:10px;cursor:pointer}
.hero{padding:76px 0 56px;background:
 radial-gradient(circle at 80% 20%,rgba(37,99,235,.16),transparent 30%),
 radial-gradient(circle at 20% 20%,rgba(6,182,212,.12),transparent 28%),
 linear-gradient(180deg,#fff 0%,#f5f8ff 100%)}
.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:50px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);background:#eaf1ff;border:1px solid #dbe7ff;padding:8px 12px;border-radius:999px}
.hero h1{font-size:clamp(38px,5vw,66px);line-height:1.05;letter-spacing:-.045em;margin:18px 0 20px}
.hero p{font-size:18px;color:var(--muted);max-width:680px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:13px;padding:12px 17px;font-weight:800;font-size:14px;border:1px solid var(--line);background:#fff}
.btn-primary{background:var(--dark);color:#fff;border-color:var(--dark)}
.btn:hover{transform:translateY(-1px)}
.hero-card{background:var(--dark);border-radius:28px;padding:26px;box-shadow:0 25px 70px rgba(15,23,42,.2);color:#fff;position:relative;overflow:hidden}
.hero-card:before{content:"";position:absolute;width:220px;height:220px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-2));right:-70px;top:-90px;opacity:.7}
.hero-card .window{position:relative;border:1px solid rgba(255,255,255,.14);border-radius:18px;background:rgba(255,255,255,.06);padding:20px}
.window-bar{display:flex;gap:6px;margin-bottom:26px}
.window-bar i{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.35)}
.hero-stat{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.stat{padding:16px;border-radius:15px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08)}
.stat b{display:block;font-size:23px}.stat span{font-size:12px;color:#aab5c7}
.section{padding:72px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:28px}
.section-head h2{margin:0;font-size:32px;letter-spacing:-.03em}
.section-head p{margin:0;color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 10px 35px rgba(15,23,42,.04);transition:.2s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card-media{aspect-ratio:16/9;overflow:hidden;background:#edf1f7}
.card-media img{width:100%;height:100%;object-fit:cover}
.card-body{padding:22px}
.meta{font-size:12px;color:var(--muted);font-weight:700}
.card h3{font-size:19px;line-height:1.25;margin:8px 0 10px;letter-spacing:-.02em}
.card p{font-size:14px;color:var(--muted);margin:0 0 17px}
.read{font-size:13px;font-weight:800;color:var(--accent)}
.feature{margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:24px;background:var(--dark);color:#fff;border-radius:28px;overflow:hidden}
.feature-media{min-height:330px;background:#111827;position:relative}
.feature-media img{width:100%;height:100%;object-fit:cover;opacity:.82}
.feature-body{padding:42px}
.feature-body .meta{color:#aeb9ca}.feature-body h2{font-size:34px;line-height:1.15;margin:10px 0 14px;letter-spacing:-.03em}.feature-body p{color:#c3ccd9}
.article-wrap{padding:62px 0 80px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:34px;align-items:start}
.article{background:#fff;border:1px solid var(--line);border-radius:24px;padding:clamp(24px,4vw,52px);box-shadow:0 12px 45px rgba(15,23,42,.05)}
.article-header{margin-bottom:30px;padding-bottom:24px;border-bottom:1px solid var(--line)}
.article-header .meta{display:flex;gap:10px;align-items:center}.article-header h1{font-size:clamp(34px,5vw,52px);line-height:1.1;letter-spacing:-.045em;margin:12px 0}
.article-header .lead{color:var(--muted);font-size:17px;margin:0}
.article-body{font-size:17px;color:#273449}
.article-body p{margin:0 0 20px}
.article-body h2,.article-body .legacy-heading{font-size:27px;line-height:1.2;letter-spacing:-.025em;color:var(--ink);margin:34px 0 13px}
.article-body ul,.article-body ol{padding-left:24px;margin:0 0 24px}
.article-body li{margin:6px 0}
.article-body a{color:var(--accent);font-weight:700;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.article-media{margin:26px 0;border-radius:18px;overflow:hidden;background:#f2f4f7;border:1px solid var(--line)}
.article-media img{width:100%;height:auto;max-height:650px;object-fit:contain;margin:auto}
.sidebar{position:sticky;top:105px;display:grid;gap:16px}
.side-box{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px}
.side-box h3{margin:0 0 14px;font-size:15px}
.side-link{display:block;padding:11px 0;border-top:1px solid var(--line);font-size:13px;font-weight:700}
.side-link:first-of-type{border-top:0}
.side-link span{display:block;color:var(--muted);font-weight:500;font-size:11px;margin-top:3px}
.contact{display:grid;grid-template-columns:.8fr 1.2fr;gap:24px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:32px;box-shadow:var(--shadow)}
.contact-card h2{margin-top:0}
.form{display:grid;gap:14px}
label{font-size:12px;font-weight:800;color:#475467}
input,textarea{width:100%;margin-top:7px;border:1px solid #dfe4ec;border-radius:13px;padding:13px 14px;font:inherit;outline:none;background:#fff}
input:focus,textarea:focus{border-color:#9dbbff;box-shadow:0 0 0 4px #edf3ff}
textarea{min-height:150px;resize:vertical}
.notice{font-size:13px;color:var(--muted);background:#f7f9fc;border:1px solid var(--line);padding:14px;border-radius:14px}
.footer{background:#0b1220;color:#c7d0df;padding:44px 0 28px;margin-top:30px}
.footer-grid{display:flex;justify-content:space-between;gap:30px;align-items:flex-start}
.footer img{width:175px;filter:grayscale(1) brightness(0) invert(1);opacity:.9}
.footer p{font-size:13px;max-width:480px}
.footer-nav{display:flex;gap:18px;font-size:13px;font-weight:700}
.footer-bottom{margin-top:28px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);font-size:12px;color:#8995a8}
.breadcrumb{font-size:12px;color:var(--muted);margin-bottom:18px}
.empty-image{display:grid;place-items:center;height:100%;min-height:210px;color:#98a2b3;font-size:12px}
@media (max-width:900px){
 .hero-grid,.feature,.contact,.article-layout{grid-template-columns:1fr}
 .cards{grid-template-columns:repeat(2,1fr)}
 .sidebar{position:static}
 .feature-media{min-height:250px}
}
@media (max-width:680px){
 .container{width:min(calc(100% - 28px),var(--max))}
 .nav{min-height:70px}.brand img{width:155px}
 .menu-btn{display:block}.nav-links{display:none;position:absolute;left:14px;right:14px;top:70px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:8px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav-links.open{display:flex}.nav-links a{padding:12px}
 .hero{padding:50px 0 42px}.hero p{font-size:16px}.hero-card{padding:18px}
 .section{padding:52px 0}.section-head{display:block}.section-head h2{font-size:28px;margin-bottom:7px}
 .cards{grid-template-columns:1fr}.feature-body{padding:28px}.feature-body h2{font-size:29px}
 .article-wrap{padding:42px 0 60px}.article{padding:24px 20px}.article-body{font-size:16px}
 .contact-card{padding:24px}.footer-grid{flex-direction:column}.footer-nav{flex-wrap:wrap}
}

/* Dark feature alanındaki beyaz butonun metni görünür olsun. */
.feature .btn:not(.btn-primary){color:var(--ink);background:#fff;border-color:#fff}