/* Neural Academy
   Renkler: ink/petrol tonları assets/logo.png dosyasından, Lumia yeşilleri
   assets/lumia/lumia-logo.png dosyasından ölçülmüştür. */
:root {
  --bg: #FAFAF6;
  --surface: #FFFFFF;
  --surface-alt: #F3F3EC;
  --ink: #10222A;
  --navy: #152A33;
  --petrol: #2C4951;
  --teal: #74979D;
  --muted: #4A5F66;
  --line: #E2E3DA;
  --line-strong: #C9CDC3;

  --lumia-deep: #1A4336;
  --lumia-mid: #5E8663;
  --lumia-soft: #ACBD96;
  --lumia-bg: #E0E6C7;

  --radius: 20px;
  --radius-sm: 10px;
  --max: 1140px;
  --serif: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--petrol); text-decoration-thickness: 1px; text-underline-offset: 3px; transition: color .15s; }
a:hover { color: var(--ink); }
:focus-visible { outline: 3px solid var(--teal); outline-offset: 3px; border-radius: 4px; }

h1, h2 { font-family: var(--serif); font-weight: 400; line-height: 1.1; margin: 0 0 .5em; color: var(--ink); letter-spacing: -.015em; }
h2 { font-size: clamp(1.9rem, 1.4rem + 2vw, 2.75rem); }
h3 { font-size: 1.15rem; line-height: 1.3; margin: 0 0 .5em; font-weight: 600; }
p { margin: 0 0 1em; }
address { font-style: normal; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .container { padding: 0 32px; } }

.eyebrow {
  display: flex; align-items: center; gap: 12px;
  font-size: .78rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
  color: var(--petrol); margin-bottom: 1.1em;
}
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--teal); }

.label {
  font-size: .74rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 .55em;
}

.skip-link {
  position: absolute; left: 16px; top: -100px;
  background: var(--ink); color: #fff; padding: 8px 14px; border-radius: 6px; z-index: 100;
}
.skip-link:focus { top: 12px; color: #fff; }

/* Üst bar */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(250, 250, 246, .92);
  border-bottom: 1px solid var(--line);
}
@supports (backdrop-filter: blur(10px)) {
  .site-header { backdrop-filter: blur(10px); background: rgba(250, 250, 246, .8); }
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 4px 24px; min-height: 68px; padding-top: 10px; padding-bottom: 10px;
}
.brand {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--serif); font-size: 1.25rem; letter-spacing: -.01em;
  color: var(--ink); text-decoration: none;
}
.nav-list { display: flex; align-items: center; gap: 2px; list-style: none; margin: 0; padding: 0; }
.nav-list a {
  display: block; padding: 8px 12px; border-radius: 8px;
  color: var(--ink); text-decoration: none; font-weight: 500; font-size: .98rem;
}
.nav-list a:hover { background: var(--surface-alt); }
.nav-lang { margin-left: 10px; }
.nav-lang a {
  padding: 5px 12px; border: 1px solid var(--line-strong); border-radius: 999px;
  font-size: .8rem; font-weight: 600; letter-spacing: .1em; color: var(--petrol);
}
.nav-lang a:hover { border-color: var(--petrol); background: transparent; color: var(--ink); }
@media (max-width: 560px) {
  .header-inner { justify-content: center; }
  .nav-list a { padding: 6px 9px; }
  .nav-lang { margin-left: 4px; }
}

section[id] { scroll-margin-top: 84px; }
#lumia { scroll-margin-top: 100px; }
@media (max-width: 560px) {
  section[id] { scroll-margin-top: 124px; }
  #lumia { scroll-margin-top: 136px; }
}

/* Giriş */
.hero { padding: 48px 0 64px; }
.hero-grid { display: grid; gap: 40px; align-items: center; }
.hero h1 {
  font-size: clamp(2.75rem, 1.9rem + 3.8vw, 4.75rem);
  margin-bottom: .4em;
}
.hero .lead {
  font-family: var(--serif); font-size: clamp(1.25rem, 1.05rem + .9vw, 1.6rem); line-height: 1.35;
  color: var(--petrol); max-width: 26ch; margin-bottom: 1em;
}
.hero-note { color: var(--muted); max-width: 46ch; margin-bottom: 1.8em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-figure { margin: 0; order: -1; }
.hero-figure img {
  width: 100%; aspect-ratio: 4 / 3; object-fit: cover; object-position: 30% 25%;
  border-radius: var(--radius);
  box-shadow: 0 24px 48px -24px rgba(16, 34, 42, .35);
  outline: 1px solid rgba(16, 34, 42, .08); outline-offset: -1px;
}
@media (min-width: 900px) {
  .hero { padding: 88px 0 104px; }
  .hero-grid { grid-template-columns: 1.15fr .85fr; gap: 72px; }
  .hero-figure { order: 0; }
  .hero-figure img { aspect-ratio: 3 / 4; object-position: center; }
}

.button {
  display: inline-block;
  background: var(--navy); color: #fff; text-decoration: none; font-weight: 600;
  padding: 13px 24px; border-radius: 999px; border: 1px solid var(--navy);
  transition: background .15s, border-color .15s, color .15s;
}
.button:hover { background: var(--petrol); border-color: var(--petrol); color: #fff; }
.button-ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.button-ghost:hover { background: var(--surface-alt); border-color: var(--petrol); color: var(--ink); }

/* Bölümler */
.section { padding: 80px 0; border-top: 1px solid var(--line); }
.section-alt { background: var(--surface-alt); }
.section-head { max-width: 62ch; margin-bottom: 44px; }
.section-head h2 { margin-bottom: .45em; }
.section-head h2:last-child { margin-bottom: 0; }
.section-intro { color: var(--muted); font-size: 1.1rem; margin: 0; }
@media (min-width: 900px) { .section { padding: 104px 0; } .section-head { margin-bottom: 56px; } }

/* Hakkımızda */
.pillars {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 32px;
}
.pillars li { border-top: 1px solid var(--line-strong); padding-top: 22px; }
.pillars .num {
  display: block; font-family: var(--serif); font-size: 1rem; color: var(--petrol);
  letter-spacing: .04em; margin-bottom: 1.4em;
}
.pillars p { margin: 0; color: var(--muted); }
@media (min-width: 820px) { .pillars { grid-template-columns: repeat(3, 1fr); gap: 40px; } }

/* Lumia */
.product {
  display: grid; overflow: hidden;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 30px 60px -40px rgba(16, 34, 42, .3);
}
.product-visual {
  position: relative; aspect-ratio: 16 / 9; background: var(--lumia-bg); overflow: hidden;
}
.product-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 40%; }
.product-body { padding: 32px 24px 36px; }
.product-logo { display: block; width: 110px; margin: 0 0 24px auto; }
@media (min-width: 640px) {
  .product-logo { width: 130px; margin-bottom: 28px; }
}
.product-tag { color: var(--lumia-deep); font-size: .82rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 1.2em; }
.product-text { max-width: 60ch; margin-bottom: 1.8em; padding-bottom: 1.8em; border-bottom: 1px solid var(--line); }

.product-links { display: grid; gap: 22px 28px; clear: both; }
.link-list { list-style: none; padding: 0; margin: 0; }
.link-list li { margin-bottom: .3em; }

@media (min-width: 640px) {
  .product-links { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 900px) {
  .product { grid-template-columns: 5fr 7fr; }
  .product-visual { aspect-ratio: auto; min-height: 100%; }
  .product-body { padding: 44px 52px 48px; }
  .product-logo { width: 150px; margin-bottom: 32px; }
}

/* İletişim */
.contact-grid { display: grid; gap: 32px; }
@media (min-width: 720px) { .contact-grid { grid-template-columns: 1fr 1fr; gap: 48px; } }
.contact-item { border-top: 1px solid var(--line-strong); padding-top: 22px; }
.contact-big {
  display: inline-block; font-family: var(--serif);
  font-size: clamp(1.35rem, 1rem + 1.6vw, 2rem); letter-spacing: -.01em; line-height: 1.2;
  overflow-wrap: anywhere;
}
.contact-org { font-weight: 600; font-size: 1.05rem; margin-bottom: .35em; }
.contact-item address { font-size: 1.1rem; }

/* Alt bilgi */
.site-footer { background: var(--ink); color: #C8D3D4; padding: 28px 0; font-size: .95rem; }
.site-footer p { margin: 0; }