/*! Alfatek EdTech — 01-tokens.css · 02-base.css · 03-chrome.css · 04-elements.css · 05-sections.css */
/* =========================================================================
   Tasarım jetonları — Alfatek EdTech kurumsal kimliği

   Bu palet bilinçli olarak herhangi bir ürünün paletinden bağımsızdır.
   Alfatek bir yazılım şirketi; Masal Hazinesi bugünkü ürünü, tek ürünü
   değil. Şirket sitesi bir ürünün renk sistemini miras alırsa, ikinci ürün
   geldiğinde kimlik çöker.

   Yön: "mürekkep ve kâğıt". Grafit nötr bir sistem ve tek bir okra aksan.
   Yayınevi / üniversite yayınları ciddiyeti — çocuk uygulamasının oyuncu
   dilinden ayrışır, kurumsal muhataba (okul, rehberlik servisi, yatırımcı)
   doğru sesle konuşur.

   Aksan tek renktir ve az kullanılır: numaralar, alt çizgiler, ince kurallar.
   Koyu tema gerçek nötrdür; mor/lacivert tonlaması yoktur.
   ========================================================================= */

:root {
  color-scheme: light;

  /* Kâğıt */
  --paper: #fbfaf8;
  --paper-2: #f3f1ec;
  --paper-3: #e8e5dd;

  /* Mürekkep */
  --ink: #15171a;
  --ink-2: #15171a;
  --ink-3: #585d64;

  /* Tek aksan: okra. Dekoratif ton ve küçük puntoda AA geçen koyu tonu. */
  --accent: #b8862b;
  --accent-text: #8a5f13;

  /* Geriye dönük adlandırma — bileşenler bu adları kullanıyor */
  --deep: #15171a;
  --deep-2: #0d0e10;
  --ember: var(--accent);
  --amber: var(--accent);
  --sage: var(--ink-3);

  /* Koyu bant (alt bilgi, kapanış çağrısı) ve üzerindeki metin */
  --deep-surface: #15171a;
  --on-deep: #f3f1ec;
  --on-deep-accent: #d9a94a;

  --link: #15171a;

  /* Çizgiler ve odak */
  --rule: color-mix(in oklab, var(--ink) 12%, transparent);
  --rule-strong: color-mix(in oklab, var(--ink) 26%, transparent);
  --focus: #8a5f13;

  /* Ebru: tek renkli mürekkep damarları, aksan olarak okra.
     Çok renkli desen kurumsal tonu bozuyordu. */
  --ebru-0: #efece4;
  --ebru-1: #15171a;
  --ebru-2: #b8862b;
  --ebru-3: #585d64;
  --ebru-4: #8a7a5e;
  --ebru-opacity: 0.1;
  --ebru-saturation: 0.85;

  /* Tipografi */
  --font-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --font-text: "Lexend", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --step--2: clamp(0.72rem, 0.7rem + 0.08vw, 0.78rem);
  --step--1: clamp(0.84rem, 0.82rem + 0.1vw, 0.9rem);
  --step-0: clamp(1rem, 0.97rem + 0.16vw, 1.0625rem);
  --step-1: clamp(1.14rem, 1.08rem + 0.3vw, 1.3rem);
  --step-2: clamp(1.4rem, 1.26rem + 0.7vw, 1.85rem);
  --step-3: clamp(1.7rem, 1.45rem + 1.25vw, 2.55rem);
  --step-4: clamp(2.05rem, 1.65rem + 2vw, 3.4rem);
  --step-5: clamp(2.4rem, 1.75rem + 3.2vw, 4.6rem);

  /* Ölçü ve boşluk */
  --shell: 76rem;
  --shell-narrow: 46rem;
  --gutter: clamp(1.25rem, 4vw, 3rem);

  --s-1: 0.5rem;
  --s-2: 0.75rem;
  --s-3: 1rem;
  --s-4: 1.5rem;
  --s-5: 2rem;
  --s-6: 3rem;
  --s-7: 4rem;
  --s-8: clamp(4rem, 9vw, 7.5rem);

  --radius: 3px;
  --radius-lg: 8px;

  --header-h: 4.25rem;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

:root[data-theme="dark"] {
  color-scheme: dark;

  /* Nötr grafit — renk tonlaması yok. */
  --paper: #121316;
  --paper-2: #191b1f;
  --paper-3: #23262b;

  --ink: #eceae5;
  --ink-2: #eceae5;
  --ink-3: #9ba1a9;

  --accent: #d9a94a;
  --accent-text: #d9a94a;

  --deep: #eceae5;
  --deep-2: #23262b;
  --ember: var(--accent);
  --amber: var(--accent);
  --sage: var(--ink-3);

  --deep-surface: #0d0e10;
  --on-deep: #eceae5;
  --on-deep-accent: #d9a94a;

  --link: #eceae5;

  --rule: color-mix(in oklab, var(--ink) 16%, transparent);
  --rule-strong: color-mix(in oklab, var(--ink) 30%, transparent);
  --focus: #d9a94a;

  --ebru-0: #17191c;
  --ebru-1: #383d44;
  --ebru-2: #6b5220;
  --ebru-3: #2a2d32;
  --ebru-4: #4a443a;
  --ebru-opacity: 0.5;
  --ebru-saturation: 0.9;
}

/* =========================================================================
   Sıfırlama ve temel tipografi
   ========================================================================= */

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

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  background: var(--paper);
  color: var(--ink-2);
  font-family: var(--font-text);
  font-size: var(--step-0);
  line-height: 1.65;
  font-synthesis-weight: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
  line-height: 1.08;
  letter-spacing: -0.015em;
  text-wrap: balance;
  font-variation-settings: "opsz" 48, "SOFT" 20;
}

p {
  text-wrap: pretty;
}

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

a:hover {
  text-decoration-thickness: 2px;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  color: inherit;
}

cite {
  font-style: italic;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection {
  background: color-mix(in oklab, var(--amber) 40%, transparent);
  color: var(--ink);
}

/* Yardımcılar ------------------------------------------------------------ */

.u-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 100;
  padding: 0.7rem 1rem;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
  text-decoration: none;
  font-size: var(--step--1);
  transform: translateY(-160%);
  transition: transform 0.18s var(--ease);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

#main:focus {
  outline: none;
}

/* Kabuk ------------------------------------------------------------------ */

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.shell--narrow {
  max-width: var(--shell-narrow);
}

.section {
  padding-block: var(--s-8);
  border-top: 1px solid var(--rule);
}

.section--tight {
  padding-block: var(--s-7);
}

.section:first-child {
  border-top: 0;
}

.section--panel {
  background: var(--paper-2);
}

/* Hareket tercihi -------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* =========================================================================
   Site çerçevesi: başlık, gezinme, mobil menü, alt bilgi
   ========================================================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--paper) 86%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.site-header[data-scrolled] {
  border-bottom-color: var(--rule);
}

.site-header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: var(--s-4);
}

/* Marka ------------------------------------------------------------------ */

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
  margin-inline-end: auto;
}

.brand .mark {
  flex: none;
}

.brand-text {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  font-family: var(--font-display);
  font-size: 1.12rem;
  letter-spacing: -0.01em;
  font-variation-settings: "opsz" 20, "SOFT" 30;
}

.brand-name {
  font-weight: 700;
}

.brand-sub {
  font-weight: 400;
  color: var(--ink-3);
  font-size: 0.88em;
}

/* Gezinme ---------------------------------------------------------------- */

.site-nav {
  display: none;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0.85rem, 1.6vw, 1.6rem);
}

.nav-link {
  position: relative;
  display: inline-block;
  padding-block: 0.4rem;
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--ink-2);
  text-decoration: none;
  white-space: nowrap;
}

.nav-link::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: 0.1rem;
  height: 1.5px;
  background: var(--ember);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.24s var(--ease);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

.nav-link.is-current {
  color: var(--ink);
}

.nav-link.is-current::after {
  transform: scaleX(1);
}

/* Araçlar ---------------------------------------------------------------- */

.header-tools {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.lang-switch {
  display: inline-grid;
  place-items: center;
  min-width: 2.25rem;
  height: 2.25rem;
  padding-inline: 0.5rem;
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius);
  font-size: var(--step--2);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink-2);
  text-decoration: none;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.lang-switch:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--ink-2);
  cursor: pointer;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.icon-btn:hover {
  border-color: var(--rule-strong);
  color: var(--ink);
}

:root[data-theme="light"] .icon-moon,
:root[data-theme="dark"] .icon-sun {
  display: none;
}

.menu-bars {
  display: grid;
  gap: 5px;
  width: 18px;
}

.menu-bars span {
  height: 1.6px;
  background: currentColor;
  transition: transform 0.22s var(--ease), opacity 0.16s var(--ease);
}

[data-menu-toggle][aria-expanded="true"] .menu-bars span:first-child {
  transform: translateY(3.3px) rotate(45deg);
}

[data-menu-toggle][aria-expanded="true"] .menu-bars span:last-child {
  transform: translateY(-3.3px) rotate(-45deg);
}

/* Mobil menü ------------------------------------------------------------- */

.mobile-menu {
  position: fixed;
  inset: var(--header-h) 0 0;
  z-index: 45;
  background: var(--paper);
  border-top: 1px solid var(--rule);
  overflow-y: auto;
  padding-block: var(--s-5) var(--s-7);
  animation: menu-in 0.22s var(--ease);
}

@keyframes menu-in {
  from {
    opacity: 0;
    transform: translateY(-0.5rem);
  }
}

.mobile-nav-list {
  display: grid;
  border-top: 1px solid var(--rule);
}

.mobile-nav-list .nav-link {
  display: block;
  padding-block: 1rem;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.mobile-nav-list .nav-link::after {
  display: none;
}

.mobile-menu-meta {
  margin-top: var(--s-5);
}

body[data-menu-open] {
  overflow: hidden;
}

@media (min-width: 62rem) {
  .site-nav {
    display: block;
  }

  .menu-btn {
    display: none;
  }
}

/* Alt bilgi -------------------------------------------------------------- */

.site-footer {
  background: var(--deep-surface);
  color: color-mix(in oklab, var(--on-deep) 78%, transparent);
  padding-top: var(--s-8);
  --rule: color-mix(in oklab, var(--on-deep) 16%, transparent);
}

.site-footer a {
  color: color-mix(in oklab, var(--on-deep) 90%, transparent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in oklab, var(--on-deep) 25%, transparent);
  transition: border-color 0.18s var(--ease);
}

.site-footer a:hover {
  border-bottom-color: var(--on-deep-accent);
}

.footer-grid {
  display: grid;
  gap: var(--s-6);
  padding-bottom: var(--s-7);
}

.footer-wordmark {
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 600;
  color: var(--on-deep);
  margin-top: var(--s-2);
}

.footer-note {
  max-width: 34ch;
  margin-top: var(--s-2);
  font-size: var(--step--1);
  line-height: 1.6;
}

.footer-status {
  margin-top: var(--s-3);
}

.footer-heading {
  font-family: var(--font-text);
  font-size: var(--step--2);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: color-mix(in oklab, var(--on-deep) 74%, transparent);
  margin-bottom: var(--s-3);
}

.footer-col ul {
  display: grid;
  gap: 0.55rem;
  font-size: var(--step--1);
}

.footer-plain {
  color: color-mix(in oklab, var(--on-deep) 76%, transparent);
}

.footer-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
  padding-block: var(--s-4);
  border-top: 1px solid var(--rule);
  font-size: var(--step--2);
}

.lang-switch--footer {
  border-color: color-mix(in oklab, var(--on-deep) 28%, transparent);
  color: color-mix(in oklab, var(--on-deep) 85%, transparent);
}

.lang-switch--footer:hover {
  border-color: var(--on-deep-accent);
  color: var(--on-deep);
}

@media (min-width: 48rem) {
  .footer-grid {
    grid-template-columns: 1.6fr 1fr 1fr;
    gap: var(--s-7);
  }
}

/* Kurumsal unvan alt bilgide tam hâliyle yer alır; uzun olduğu için sarılır. */
.footer-legal {
  max-width: 62ch;
  line-height: 1.5;
}

.footer-registry {
  flex-basis: 100%;
  line-height: 1.5;
  color: color-mix(in oklab, var(--on-deep) 76%, transparent);
}

.mobile-menu-meta a {
  font-size: var(--step--1);
  color: var(--ink-2);
}

/* =========================================================================
   Yeniden kullanılan öğeler: düğmeler, başlıklar, istatistik, alıntı, ebru
   ========================================================================= */

/* Ebru alanı ------------------------------------------------------------- */

.ebru {
  width: 100%;
  height: 100%;
  opacity: var(--ebru-opacity);
  filter: saturate(var(--ebru-saturation));
}

/* Dar ekranda desenin kaçacağı yer yok; metnin arkasına girmemesi için söndürülür. */
@media (max-width: 40rem) {
  .ebru {
    opacity: calc(var(--ebru-opacity) * 0.6);
  }
}

.hero-bg,
.page-hero-bg,
.founder-band {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

/* Desen metnin arkasından çekilir: sola doğru söner, altta tamamen biter.
   Böylece başlık her zaman düz kâğıt üzerinde okunur. */
.hero-bg {
  --ebru-mask: linear-gradient(100deg, transparent 0 30%, #000 82%),
    linear-gradient(to bottom, #000 0 45%, transparent 92%);
  -webkit-mask-image: var(--ebru-mask);
  mask-image: var(--ebru-mask);
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
}

.page-hero-bg {
  --ebru-mask: linear-gradient(115deg, transparent 0 42%, #000 95%),
    linear-gradient(to bottom, #000 0 40%, transparent 100%);
  -webkit-mask-image: var(--ebru-mask);
  mask-image: var(--ebru-mask);
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
}

.founder-band {
  -webkit-mask-image: linear-gradient(to left, #000 0%, transparent 62%);
  mask-image: linear-gradient(to left, #000 0%, transparent 62%);
}

/* Etiket / eyebrow -------------------------------------------------------- */

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--step--2);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.pin {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ember);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--ember) 22%, transparent);
}

/* Bölüm başlıkları -------------------------------------------------------- */

.section-head {
  max-width: 34ch;
  margin-bottom: var(--s-6);
}

.section-title {
  margin-top: var(--s-3);
  font-size: var(--step-3);
}

.section-lede {
  margin-top: var(--s-3);
  max-width: 46ch;
  font-size: var(--step-1);
  color: var(--ink-2);
  line-height: 1.5;
}

.section-foot {
  margin-top: var(--s-5);
}

/* Düğmeler ---------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 1.35rem;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.btn:hover {
  background: var(--deep-2);
  border-color: var(--deep-2);
  color: var(--paper);
}

:root[data-theme="dark"] .btn:hover {
  background: var(--paper-3);
  border-color: var(--paper-3);
  color: var(--ink);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule-strong);
}

.btn--ghost:hover {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}

/* Koyu bandın (alt bilgi, kapanış çağrısı) üzerinde durur. O bant iki temada da
   koyu olduğu için düğme --paper'a bağlanamaz: koyu temada --paper de koyudur ve
   metin zeminle aynı tona düşer. Her iki temada da açık yüzey + koyu metin. */
.btn--invert {
  background: var(--on-deep);
  color: var(--deep-surface);
  border-color: var(--on-deep);
}

.btn--invert:hover {
  background: var(--on-deep-accent);
  border-color: var(--on-deep-accent);
  color: var(--deep-surface);
}

.btn-arrow,
.tlink-arrow {
  display: inline-block;
  transition: transform 0.22s var(--ease);
}

.btn:hover .btn-arrow,
.tlink:hover .tlink-arrow {
  transform: translateX(3px);
}

.tlink {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1.5px solid var(--ember);
  padding-bottom: 0.2rem;
}

.tlink:hover {
  border-bottom-color: var(--ink);
}

/* İstatistik -------------------------------------------------------------- */

.stat-row {
  display: grid;
  gap: var(--s-5);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (min-width: 58rem) {
  .stat-row {
    grid-template-columns: repeat(var(--stat-cols, 4), minmax(0, 1fr));
  }
}

.stat {
  padding-top: var(--s-3);
  border-top: 2px solid var(--ink);
}

.stat-value {
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-weight: 600;
  line-height: 1;
  color: var(--ink);
  font-variation-settings: "opsz" 144, "SOFT" 0;
  letter-spacing: -0.03em;
}

.stat-label {
  margin-top: 0.5rem;
  max-width: 22ch;
  font-size: var(--step--1);
  color: var(--ink-3);
  line-height: 1.45;
}

/* Metin blokları ---------------------------------------------------------- */

.prose {
  display: grid;
  gap: var(--s-3);
  max-width: 62ch;
}

.prose--lead > p:first-child {
  font-size: var(--step-1);
  line-height: 1.55;
  color: var(--ink);
}

/* Düz liste ---------------------------------------------------------------- */

.plain-list {
  display: grid;
  gap: 0.6rem;
  font-size: var(--step--1);
  color: var(--ink-3);
  line-height: 1.5;
}

/* Künye listesi ----------------------------------------------------------- */

.facts,
.contact-list {
  display: grid;
}

.fact,
.contact-item {
  display: grid;
  gap: 0.25rem;
  padding-block: var(--s-3);
  border-top: 1px solid var(--rule);
}

.fact:last-child,
.contact-item:last-child {
  border-bottom: 1px solid var(--rule);
}

.fact dt,
.contact-item dt {
  font-size: var(--step--2);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.fact dd,
.contact-item dd {
  margin: 0;
  color: var(--ink);
}

/* =========================================================================
   Sayfa bölümleri
   ========================================================================= */

/* Giriş alanı ------------------------------------------------------------- */

.hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(3.5rem, 9vw, 7.5rem) clamp(3rem, 7vw, 5.5rem);
  overflow: hidden;
}

.hero-inner {
  position: relative;
  display: grid;
  gap: var(--s-6);
  align-items: center;
}

@media (min-width: 56rem) {
  .hero-inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(2.5rem, 6vw, 5rem);
  }
}

.hero-shot {
  position: relative;
  justify-self: center;
  width: min(100%, 20rem);
}

.hero-shot > img:first-child {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
  box-shadow: 0 2px 4px color-mix(in oklab, var(--ink) 10%, transparent),
    0 30px 60px -30px color-mix(in oklab, var(--ink) 60%, transparent);
}

.hero-logo {
  position: absolute;
  left: -2.25rem;
  bottom: -1.5rem;
  width: 7.5rem;
  height: auto;
  filter: drop-shadow(0 8px 14px color-mix(in oklab, var(--ink) 30%, transparent));
}

@media (max-width: 40rem) {
  .hero-logo {
    left: -0.75rem;
    width: 5.5rem;
  }
}

.hero-eyebrow {
  color: var(--ink-2);
}

.hero-title {
  margin-top: var(--s-4);
  max-width: 18ch;
  font-size: var(--step-5);
  font-weight: 600;
  letter-spacing: -0.02em;
  /* Türkçe aksanlar (Ç, ğ, İ) satırlar arasında çarpışmasın diye 1'in altına inilmiyor. */
  line-height: 1.04;
  font-variation-settings: "opsz" 144, "SOFT" 12, "WONK" 1;
}

.hero-lede {
  margin-top: var(--s-4);
  max-width: 54ch;
  font-size: var(--step-1);
  line-height: 1.55;
  color: var(--ink-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  margin-top: var(--s-5);
}

/* İç sayfa başlığı -------------------------------------------------------- */

.page-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(2.25rem, 5vw, 3.75rem) clamp(2.5rem, 6vw, 4.5rem);
  overflow: hidden;
  border-bottom: 1px solid var(--rule);
}

.page-hero-inner {
  position: relative;
}

.breadcrumb {
  margin-bottom: var(--s-4);
  font-size: var(--step--2);
  color: var(--ink-3);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--rule-strong);
}

.breadcrumb a {
  color: var(--ink-3);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--ink);
}

.page-title {
  margin-top: var(--s-3);
  max-width: 20ch;
  font-size: var(--step-4);
  letter-spacing: -0.028em;
  font-variation-settings: "opsz" 144, "SOFT" 16, "WONK" 1;
}

.page-lede {
  margin-top: var(--s-3);
  max-width: 52ch;
  font-size: var(--step-1);
  line-height: 1.55;
  color: var(--ink-2);
}

/* İki sütunlu düzen ------------------------------------------------------- */

.split {
  display: grid;
  gap: var(--s-6);
  align-items: start;
}

.stack {
  display: grid;
  gap: var(--s-5);
}

@media (min-width: 56rem) {
  .split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: clamp(2.5rem, 6vw, 5rem);
  }

  .split--reverse .split-main {
    order: 2;
  }

  .split--reverse .split-aside {
    order: 1;
  }
}

/* Terim ızgarası ---------------------------------------------------------- */

.terms {
  display: grid;
  gap: 0 clamp(1.5rem, 4vw, 3rem);
  border-top: 1px solid var(--rule);
}

.term {
  padding-block: var(--s-4) var(--s-5);
  border-bottom: 1px solid var(--rule);
}

.term dt {
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.term dd {
  margin-top: var(--s-2);
  max-width: 52ch;
  color: var(--ink-2);
  line-height: 1.6;
}

.terms--lead .term dt {
  font-size: var(--step-2);
  letter-spacing: -0.018em;
}

.terms--lead .term dd {
  font-size: var(--step-1);
  line-height: 1.55;
}

@media (min-width: 46rem) {
  .terms[data-cols] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 64rem) {
  .terms[data-cols="3"] {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .terms[data-cols="4"] {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* Uygulama ekranları ------------------------------------------------------- */

/* Dar ekranda şerit yatay kayar; sayfa değil yalnızca şerit taşar. */
.shell--bleed {
  padding-inline: 0;
}

.screens {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(10.5rem, 1fr);
  gap: clamp(0.75rem, 2vw, 1.25rem);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: var(--gutter);
  padding-inline: var(--gutter);
  padding-block: var(--s-2) var(--s-3);
}

.screens:focus-visible {
  outline-offset: -3px;
}

.screen {
  scroll-snap-align: start;
}

.screen img,
.world img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  background: var(--paper-3);
  box-shadow: 0 1px 2px color-mix(in oklab, var(--ink) 10%, transparent),
    0 12px 32px -18px color-mix(in oklab, var(--ink) 45%, transparent);
}

.screen figcaption,
.world figcaption {
  margin-top: var(--s-2);
  font-size: var(--step--1);
  color: var(--ink-3);
}

@media (min-width: 64rem) {
  .shell--bleed {
    padding-inline: var(--gutter);
  }

  .screens {
    overflow-x: visible;
    padding-inline: 0;
  }
}

.section--showcase .section-head {
  margin-bottom: var(--s-5);
}

.section-foot--row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3) var(--s-5);
}

/* Masal dünyaları ---------------------------------------------------------- */

.worlds {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(0.75rem, 2vw, 1.25rem);
}

.world img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

@media (min-width: 52rem) {
  .worlds {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.product-logo {
  display: block;
  width: min(100%, 16rem);
  height: auto;
  margin-inline: auto;
}

/* Yaklaşım bölümleri ------------------------------------------------------- */

.chapters {
  display: grid;
  border-top: 1px solid var(--rule);
}

.chapter {
  display: grid;
  gap: var(--s-3);
  padding-block: var(--s-6);
  border-bottom: 1px solid var(--rule);
}

.chapter-title {
  font-size: var(--step-3);
  letter-spacing: -0.024em;
}

@media (min-width: 56rem) {
  .chapter {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
    gap: clamp(1.5rem, 5vw, 4rem);
  }
}

/* Okullar notu ------------------------------------------------------------- */

.schools-note {
  padding-top: var(--s-3);
  border-top: 2px solid var(--ink);
  color: var(--ink-2);
  line-height: 1.6;
}

.side-title {
  font-size: var(--step-2);
  letter-spacing: -0.018em;
  margin-bottom: var(--s-2);
}

.aud-rows {
  display: grid;
  border-top: 1px solid var(--rule);
}

.aud-row {
  display: grid;
  gap: var(--s-3);
  padding-block: var(--s-6);
  border-bottom: 1px solid var(--rule);
}

.aud-row-title {
  font-size: var(--step-3);
  letter-spacing: -0.026em;
}

.aud-row-body {
  max-width: 52ch;
  color: var(--ink-2);
  line-height: 1.6;
}

@media (min-width: 56rem) {
  .aud-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
    gap: clamp(1.5rem, 5vw, 4rem);
    align-items: baseline;
  }
}

/* Kurucu ------------------------------------------------------------------ */

.founder-role {
  font-size: var(--step--2);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-text);
  margin-bottom: var(--s-3);
}

.team-panel {
  position: relative;
  isolation: isolate;
  padding: clamp(2rem, 5vw, 3.5rem);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.team-panel-body {
  position: relative;
  max-width: 60ch;
}

.team-panel .section-head {
  margin-bottom: var(--s-3);
}

.team-fields {
  display: grid;
  gap: 0;
  margin-top: var(--s-5);
  border-top: 1px solid var(--rule);
}

.team-fields li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-2);
  padding-block: var(--s-3);
  border-bottom: 1px solid var(--rule);
}

.team-field-name {
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.team-field-note {
  font-size: var(--step--1);
  color: var(--ink-3);
}

/* Kurucu sayfasındaki istatistikler üç adet; dört sütunlu varsayılan boşluk bırakırdı. */
.split-main .stat-row {
  --stat-cols: 3;
  margin-top: var(--s-5);
}

.side-block {
  padding-top: var(--s-3);
  border-top: 2px solid var(--ink);
}

.side-heading {
  font-family: var(--font-text);
  font-size: var(--step--2);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: var(--s-3);
}

.works {
  display: grid;
  gap: 0.6rem;
}

.works cite {
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-style: italic;
  color: var(--ink);
  font-variation-settings: "opsz" 40, "SOFT" 40, "WONK" 1;
}

/* İletişim ---------------------------------------------------------------- */

.contact-link {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.018em;
  text-decoration: none;
  border-bottom: 2px solid var(--ember);
  padding-bottom: 0.1rem;
  word-break: break-word;
}

.contact-link:hover {
  border-bottom-color: var(--ink);
}

.contact-plain {
  font-size: var(--step-1);
}

.contact-note {
  margin-top: var(--s-5);
  max-width: 54ch;
  font-size: var(--step--1);
  color: var(--ink-3);
  line-height: 1.6;
}

/* Kapanış çağrısı --------------------------------------------------------- */

.cta-band {
  background: var(--deep-2);
  color: color-mix(in oklab, var(--on-deep) 82%, transparent);
  padding-block: var(--s-8);
}

.cta-band-inner {
  display: grid;
  gap: var(--s-5);
  align-items: end;
}

.cta-title {
  font-size: var(--step-3);
  color: var(--on-deep);
  max-width: 20ch;
  letter-spacing: -0.026em;
}

.cta-body {
  margin-top: var(--s-3);
  max-width: 46ch;
  line-height: 1.6;
}

.cta-actions {
  display: grid;
  gap: var(--s-3);
  justify-items: start;
}

.cta-mail {
  font-size: var(--step--1);
  color: color-mix(in oklab, var(--on-deep) 72%, transparent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in oklab, var(--on-deep) 30%, transparent);
  word-break: break-word;
}

.cta-mail:hover {
  border-bottom-color: var(--on-deep-accent);
  color: var(--on-deep);
}

@media (min-width: 56rem) {
  .cta-band-inner {
    grid-template-columns: 1.4fr 1fr;
    gap: var(--s-7);
  }

  .cta-actions {
    justify-items: end;
    text-align: right;
  }
}

/* 404 --------------------------------------------------------------------- */

.section--404 {
  padding-block: clamp(4rem, 14vw, 9rem);
}