/* zeynalkarabulut.com – tasarım sistemi
   Tek yazı ailesi (cihazın sistem fontu), ölçülü tipografi ölçeği, 8px ızgara.
   Üçüncü taraf font ya da istek yok. */

:root {
  --bg: #FAFAF8;
  --bg-2: #F2F2EE;
  --card: #FFFFFF;
  --ink: #111318;
  --ink-2: #3D424C;
  --muted: #6E737D;
  --line: #E6E6E1;
  --accent: #24497A;
  --night: #0E1626;
  --night-2: #16223A;
  --night-ink: #EEF1F6;
  --night-muted: #A6B0C3;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --radius: 16px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0E0F12;
    --bg-2: #15171B;
    --card: #16181C;
    --ink: #EDEEF0;
    --ink-2: #C3C7CE;
    --muted: #8C919A;
    --line: #25282E;
    --accent: #8FB1E3;
    --night: #0B1220;
    --night-2: #121C30;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16.5px/1.7 var(--sans); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
::selection { background: var(--accent); color: #fff; }

.wrap { width: min(1080px, 100% - 48px); margin-inline: auto; }
.narrow { width: min(720px, 100% - 48px); margin-inline: auto; }

/* ---------- Tipografi ---------- */
h1, h2, h3 { font-family: var(--display); color: var(--ink); margin: 0; }
h1 { font-size: clamp(34px, 4.4vw, 50px); line-height: 1.1; font-weight: 650; letter-spacing: -0.032em; }
h2 { font-size: clamp(26px, 2.8vw, 32px); line-height: 1.2; font-weight: 650; letter-spacing: -0.025em; }
h3 { font-size: 17px; line-height: 1.35; font-weight: 620; letter-spacing: -0.012em; }
.kicker { margin: 0 0 14px; font-size: 12.5px; font-weight: 650; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.lead { font-size: 18px; line-height: 1.65; color: var(--ink-2); max-width: 60ch; margin: 0; }
.muted { color: var(--muted); }

/* ---------- Menü ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(14px); -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent; transition: border-color .3s;
}
.nav.scrolled { border-bottom-color: var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 650; font-size: 15.5px; letter-spacing: -0.01em; }
.mark {
  width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center;
  background: var(--ink); color: var(--bg); font-size: 12px; font-weight: 750; letter-spacing: .02em;
}
.nav ul { list-style: none; display: flex; align-items: center; gap: 28px; margin: 0; padding: 0; }
.nav ul a { text-decoration: none; font-size: 14.5px; font-weight: 520; color: var(--muted); transition: color .2s; }
.nav ul a:hover { color: var(--ink); }

/* ---------- Düğmeler ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; height: 42px; padding: 0 18px; border-radius: 10px;
  font: 560 14.5px/1 var(--sans); text-decoration: none; color: var(--ink);
  border: 1px solid var(--line); background: var(--card);
  transition: background .2s, border-color .2s, color .2s;
}
.btn:hover { border-color: color-mix(in srgb, var(--ink) 35%, var(--line)); }
.btn.solid { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn.solid:hover { background: color-mix(in srgb, var(--ink) 85%, var(--bg)); }
.btn svg { width: 16px; height: 16px; fill: currentColor; flex: none; }
.row { display: flex; flex-wrap: wrap; gap: 10px; }

/* ---------- Bölümler ---------- */
section { padding: 88px 0; }
.section-head { margin-bottom: 40px; max-width: 640px; }
.section-head p { margin: 12px 0 0; color: var(--muted); }
.rule { border: 0; border-top: 1px solid var(--line); margin: 0; }

/* Giriş */
.hero { padding: 104px 0 88px; }
.hero h1 { max-width: 20ch; }
.hero .lead { margin: 22px 0 32px; }

/* Hakkımda */
.about-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 72px; align-items: start; }
.about-grid .copy p { color: var(--ink-2); margin: 0 0 16px; }
.facts { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.facts li { display: flex; justify-content: space-between; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.facts span { color: var(--muted); }
.facts b { font-weight: 560; text-align: right; }

/* İlkeler */
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 56px; }
.principle { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.principle .num { display: block; font-size: 13px; font-weight: 650; color: var(--muted); margin-bottom: 14px; font-variant-numeric: tabular-nums; }
.principle p { color: var(--muted); margin: 6px 0 0; font-size: 15px; line-height: 1.6; }

/* ---------- Öne çıkan proje ---------- */
.feature-project {
  display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 24px;
  background: radial-gradient(700px 420px at 90% 0%, rgba(96, 136, 214, .22), transparent 60%), linear-gradient(180deg, var(--night), var(--night-2));
  color: var(--night-ink); border-radius: 20px; overflow: hidden; padding: 56px; text-decoration: none;
}
.feature-project h3 { color: var(--night-ink); font-size: clamp(24px, 2.6vw, 30px); line-height: 1.2; letter-spacing: -0.025em; font-weight: 650; }
.feature-project p { color: var(--night-muted); margin: 12px 0 22px; max-width: 44ch; }
.app-id { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
.app-id img { width: 56px; height: 56px; border-radius: 13px; box-shadow: 0 6px 18px rgba(0,0,0,.35); }
.app-id b { font-weight: 620; }
.app-id small { display: block; color: var(--night-muted); font-size: 13.5px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 28px; }
.chip { font-size: 12.5px; font-weight: 520; padding: 5px 10px; border-radius: 6px; background: rgba(238, 241, 246, .08); color: var(--night-muted); }
.feature-project .btn, .app-hero .btn { background: transparent; color: var(--night-ink); border-color: rgba(238, 241, 246, .22); }
.feature-project .btn:hover, .app-hero .btn:hover { border-color: rgba(238, 241, 246, .5); }
.feature-project .btn.light, .app-hero .btn.light { background: var(--night-ink); color: var(--night); border-color: var(--night-ink); }
.app-hero .btn.light { cursor: default; }

.phones { position: relative; height: 480px; }
.phone {
  position: absolute; width: 212px; aspect-ratio: 1179 / 2556; border-radius: 36px; overflow: hidden;
  border: 6px solid #05070C; background: #05070C;
  box-shadow: 0 0 0 1px rgba(255,255,255,.07), 0 30px 60px -20px rgba(0,0,0,.6);
  transition: transform .6s var(--ease);
}
.phone img { width: 100%; height: 100%; object-fit: cover; border-radius: 30px; }
.phones .p1 { left: 10%; top: 44px; transform: rotate(-5deg); }
.phones .p2 { right: 8%; top: 0; transform: rotate(4deg); z-index: 2; }
.feature-project:hover .p1 { transform: rotate(-6deg) translateY(-4px); }
.feature-project:hover .p2 { transform: rotate(5deg) translateY(-6px); }
.more-soon { margin: 16px 0 0; color: var(--muted); font-size: 14.5px; }

/* ---------- İletişim ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: end; }
.contact-grid .lead { margin-top: 12px; }
.mail { display: inline-block; margin-top: 20px; font-size: 18px; font-weight: 560; color: var(--accent); text-decoration: none; }
.mail:hover { text-decoration: underline; text-underline-offset: 4px; }

/* ---------- Altbilgi ---------- */
footer { border-top: 1px solid var(--line); padding: 28px 0 40px; font-size: 13.5px; color: var(--muted); }
footer .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; }
footer nav { display: flex; flex-wrap: wrap; gap: 20px; }
footer a { text-decoration: none; }
footer a:hover { color: var(--ink); }

/* ---------- Uygulama sayfası ---------- */
.app-hero {
  background: radial-gradient(800px 460px at 90% 0%, rgba(96, 136, 214, .24), transparent 60%), linear-gradient(180deg, var(--night), var(--night-2));
  color: var(--night-ink); padding-top: 72px; overflow: hidden;
}
.app-hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 32px; align-items: end; }
.app-hero .copy { padding-bottom: 80px; }
.app-hero .kicker { color: var(--night-muted); }
.app-hero h1 { color: var(--night-ink); }
.app-hero .lead { color: var(--night-muted); margin: 18px 0 28px; }
.app-hero .app-id img { width: 64px; height: 64px; border-radius: 15px; }
.app-hero .meta { margin: 18px 0 0; font-size: 13.5px; color: var(--night-muted); }
.app-hero .phones { height: 520px; }
.app-hero .phones .p1 { top: 80px; }
.app-hero .phones .p2 { top: 24px; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.feat .ico { width: 36px; height: 36px; border-radius: 9px; display: grid; place-items: center; margin-bottom: 16px; background: var(--bg-2); color: var(--ink); }
.feat .ico svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.feat p { color: var(--muted); margin: 6px 0 0; font-size: 15px; line-height: 1.6; }

.gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.gallery figure { margin: 0; }
.gallery .phone { position: relative; width: 100%; box-shadow: 0 0 0 1px rgba(0,0,0,.04), 0 20px 40px -20px rgba(0,0,0,.35); }
.gallery figcaption { margin-top: 14px; font-size: 14px; color: var(--muted); text-align: center; line-height: 1.5; }
.gallery figcaption b { display: block; color: var(--ink); font-weight: 600; }

.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; padding: 20px 40px 20px 0; position: relative; font-weight: 600; font-size: 16.5px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 6px; top: 50%; width: 9px; height: 9px; margin-top: -7px;
  border-right: 1.5px solid var(--muted); border-bottom: 1.5px solid var(--muted); transform: rotate(45deg); transition: transform .25s var(--ease);
}
.faq details[open] summary::after { transform: rotate(-135deg); margin-top: -2px; }
.faq details p { margin: -4px 0 22px; color: var(--ink-2); max-width: 66ch; }

.support-card {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 32px; align-items: center;
  background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 40px;
}
.support-card p { color: var(--ink-2); margin: 10px 0 0; }
.support-card .side { display: grid; gap: 10px; justify-items: start; }
.support-card .side small { color: var(--muted); font-size: 13.5px; }

/* ---------- Metin sayfaları ---------- */
.doc { padding: 72px 0 96px; }
.doc h1 { font-size: clamp(30px, 3.6vw, 40px); margin: 0 0 8px; }
.doc .updated { font-size: 14px; color: var(--muted); margin: 0 0 32px; }
.doc .summary { font-size: 17px; padding: 18px 22px; border-left: 3px solid var(--accent); background: var(--bg-2); border-radius: 0 10px 10px 0; margin: 0 0 36px; color: var(--ink); }
.doc h2 { font-size: 18px; letter-spacing: -0.01em; margin: 36px 0 8px; }
.doc p { color: var(--ink-2); margin: 0 0 14px; }
.doc a { color: var(--accent); text-underline-offset: 3px; }
.back { display: inline-block; margin-bottom: 28px; text-decoration: none; font-size: 14.5px; font-weight: 560; color: var(--muted); }
.back:hover { color: var(--ink); }

/* ---------- Görünme animasyonu (JS yoksa içerik görünür kalır) ---------- */
.js .reveal { opacity: 0; transform: translateY(12px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .phone { transition: none; }
}

/* ---------- Duyarlı ---------- */
@media (max-width: 960px) {
  .feature-project, .app-hero .wrap, .about-grid, .support-card, .contact-grid { grid-template-columns: 1fr; }
  .about-grid { gap: 32px; }
  .feature-project { padding: 36px 28px 0; }
  .phones, .app-hero .phones { height: 400px; }
  .phone { width: 176px; border-radius: 30px; border-width: 5px; }
  .phone img { border-radius: 25px; }
  .phones .p1 { left: 50%; margin-left: -184px; top: 36px; }
  .phones .p2 { right: auto; left: 50%; margin-left: 8px; top: 0; }
  .app-hero .copy { padding-bottom: 0; }
  .features, .principles { grid-template-columns: 1fr 1fr; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .wrap, .narrow { width: calc(100% - 40px); }
  section { padding: 64px 0; }
  .hero { padding: 64px 0 56px; }
  .nav ul { gap: 18px; }
  .nav ul li:first-child { display: none; }
  .features, .principles { grid-template-columns: 1fr; }
  .principles { margin-top: 40px; }
  .gallery { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; gap: 16px; margin-inline: -20px; padding: 4px 20px 8px; }
  .gallery figure { flex: 0 0 62%; scroll-snap-align: center; }
  .phones, .app-hero .phones { height: 340px; }
  .phone { width: 150px; }
  .phones .p1 { margin-left: -158px; }
  .support-card { padding: 28px; }
}