:root {
  --black: #0d0d0d;
  --white: #ffffff;
  --off-white: #f7f7f4;
  --text-dark: #111111;
  --text-light: #f5f2ea;
  --muted-dark: #666666;
  --muted-light: #beb8ad;
  --line-dark: #deded8;
  --line-light: rgba(255, 255, 255, 0.16);
  --card: #f3f3ef;
  --max: 1120px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--white);
  color: var(--text-dark);
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
}

.wrap {
  width: min(100% - 40px, var(--max));
  margin: 0 auto;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #151515;
  border-bottom: 1px solid var(--line-light);
  backdrop-filter: blur(18px);
  color: var(--text-light);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  gap: 20px;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 1.05rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.92rem;
  color: var(--muted-light);
}

.nav-links a:hover {
  color: var(--text-light);
}

.language-switch {
  display: flex;
  gap: 8px;
  border: 1px solid var(--line-light);
  border-radius: 999px;
  padding: 4px;
}

.language-switch button {
  border: 0;
  border-radius: 999px;
  padding: 6px 12px;
  background: transparent;
  color: var(--muted-light);
  cursor: pointer;
  font: inherit;
  font-size: 0.86rem;
}

.language-switch button.active {
  background: var(--white);
  color: var(--black);
  font-weight: 700;
}

.hero {
  position: relative;
  overflow: hidden;
  background: var(--black);
  color: var(--text-light);
  padding: 116px 0 86px;
  min-height: 78vh;
  display: flex;
  align-items: center;
}

.hero-bg-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;

  z-index: 0;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(13, 13, 13, 0.96) 0%,
    rgba(13, 13, 13, 0.82) 42%,
    rgba(13, 13, 13, 0.55) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 980px;
}

.eyebrow {
  color: var(--muted-light);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 24px;
}

h1 {
  font-size: clamp(3.4rem, 10vw, 8.2rem);
  line-height: 0.95;
  letter-spacing: 0;
  margin-bottom: 30px;
}

.lead {
  font-size: clamp(1.13rem, 2vw, 1.48rem);
  color: #dfd8cd;
  max-width: 860px;
  line-height: 1.5;
  margin-bottom: 36px;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 13px 20px;
  font-weight: 700;
  border: 1px solid currentColor;
  transition: 0.2s ease;
}

.button.primary {
  background: var(--text-light);
  border-color: var(--text-light);
  color: var(--black);
}

.button:hover {
  transform: translateY(-2px);
}

section.content-section {
  background: var(--white);
  color: var(--text-dark);
  padding: 82px 0;
  border-top: 1px solid var(--line-dark);
}

section.content-section:nth-of-type(odd) {
  background: var(--off-white);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1;
  letter-spacing: 0;
  margin-bottom: 26px;
}

.two-col {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 52px;
  align-items: start;
}

.body-text {
  color: #222222;
  font-size: 1.04rem;
}

.body-text p + p {
  margin-top: 18px;
}

/* Contact details */
.contact-details {
  margin-top: 18px;
}

.contact-details p {
  margin: 0;
}

.contact-details p + p {
  margin-top: 4px;
}


.book-title {
  font-style: normal;
  font-weight: 800;
  color: var(--text-dark);
  border-bottom: 1px solid currentColor;
  transition: opacity 0.2s ease;
}

.book-title:hover {
  opacity: 0.65;
}

.muted {
  color: var(--muted-dark);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line-dark);
  border-radius: 22px;
  padding: 24px;
  min-height: 180px;
}

.card h3 {
  font-size: 1.12rem;
  margin-bottom: 10px;
  color: var(--text-dark);
}

.card p {
  color: var(--muted-dark);
  font-size: 0.97rem;
}


.about-photo {
  display: block;
  width: 100%;
  max-width: 340px;
  aspect-ratio: 4 / 4;
  object-fit: cover;
  margin-top: 32px;
  border-radius: 22px;
    
}



.timeline {
  display: grid;
  gap: 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  border-bottom: 1px solid var(--line-dark);
  padding: 20px 0;
}

.timeline-item:first-child {
  border-top: 1px solid var(--line-dark);
}

.timeline-item strong {
  color: var(--text-dark);
}


/* Highlight title links */
.timeline-item strong a {
  color: var(--text-dark);
  border-bottom: 1px solid currentColor;
  transition: opacity 0.2s ease;
}

.timeline-item strong a:hover {
  opacity: 0.65;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.social-links a {
  border-bottom: 1px solid var(--text-dark);
  padding-bottom: 2px;
  font-weight: 700;
}

.social-links a:hover {
  color: var(--muted-dark);
  border-color: var(--muted-dark);
}

footer {
  background: var(--white);
  padding: 36px 0;
  border-top: 1px solid var(--line-dark);
  color: var(--muted-dark);
  font-size: 0.92rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

[data-lang="en"] {
  display: none;
}

body.lang-en [data-lang="tr"] {
  display: none;
}

body.lang-en [data-lang="en"] {
  display: initial;
}


/* Language-specific highlight timelines */
.timeline[data-lang="tr"] {
  display: grid;
}

.timeline[data-lang="en"] {
  display: none;
}

body.lang-en .timeline[data-lang="tr"] {
  display: none;
}

body.lang-en .timeline[data-lang="en"] {
  display: grid;
}



body.lang-en .contact-copy[data-lang="en"] {
  display: block;
}

/* Language-specific hero buttons */

body.lang-en .buttons[data-lang="en"] {
  display: flex;
}

body.lang-en .buttons[data-lang="tr"] {
  display: none;
}



@media (max-width: 860px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
  }

  .hero {
    min-height: auto;
    padding: 86px 0 72px;
  }

  h1 {
    font-size: clamp(3rem, 16vw, 5rem);
  }

  .two-col,
  .grid {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}