:root {
  --bg: #000000;          /* Deep pitch black */
  --ink: #F2F0EA;         /* warm off-white */
  --muted: #7C7B76;       /* grey for labels / secondary */
  --faint: #3A3A38;       /* very dim */
  --line: rgba(255,255,255,0.11);
  --accent: #C8443A;      /* muted brick red */
  --pad: clamp(20px, 5vw, 64px);
  --maxw: 1240px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Inter", -apple-system, system-ui, sans-serif;
  font-weight: 400;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--accent); color: #fff; }
a { color: inherit; text-decoration: none; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

/* ---- utility label ---- */
.label {
  font-size: 0.68rem; font-weight: 500; text-transform: uppercase;
  letter-spacing: 0.15em; color: var(--muted);
}

/* ---- top bar (Carl Sagan style) ---- */
.topbar-carl {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: relative;
  z-index: 1000;
}

/* Topbar for project pages (no .nav-links) */
header.topbar-carl:not(:has(.nav-links)) {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
}
header.topbar-carl:not(:has(.nav-links)) > a,
header.topbar-carl:not(:has(.nav-links)) > button {
  display: flex; align-items: center; justify-content: center;
  padding: 24px 0; font-size: 1.05rem;
  text-transform: uppercase; letter-spacing: 0.1em; color: #ffffff;
  font-weight: 500; transition: background 0.3s, color 0.3s;
  background: transparent; border: none; font-family: inherit; cursor: none;
  border-right: 1px solid var(--line);
}
header.topbar-carl:not(:has(.nav-links)) > :last-child {
  border-right: none;
}
header.topbar-carl:not(:has(.nav-links)) > a:hover,
header.topbar-carl:not(:has(.nav-links)) > button:hover {
  background: #ffffff; color: var(--bg);
}

@media(max-width: 768px) {
  header.topbar-carl:not(:has(.nav-links)) {
    grid-template-columns: 1fr 1fr;
  }
  header.topbar-carl:not(:has(.nav-links)) > a,
  header.topbar-carl:not(:has(.nav-links)) > button {
    font-size: 0.75rem; padding: 15px 0;
  }
  header.topbar-carl:not(:has(.nav-links)) > :nth-child(1),
  header.topbar-carl:not(:has(.nav-links)) > :nth-child(2) {
    border-bottom: 1px solid var(--line);
  }
  header.topbar-carl:not(:has(.nav-links)) > :nth-child(even) {
    border-right: none;
  }
}
.nav-links {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
}
.nav-links a, .nav-links button.lang-toggle {
  display: block;
  text-align: center;
  padding: 24px 0;
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #ffffff;
  font-weight: 500;
  transition: background 0.3s, color 0.3s;
  background: transparent;
  border: none;
  font-family: inherit;
  cursor: none;
  width: 100%;
}
.nav-links a:not(:last-child), .nav-links button.lang-toggle:not(:last-child) {
  border-right: 1px solid var(--line);
}
.nav-links a:hover, .nav-links button.lang-toggle:hover {
  background: #ffffff;
  color: var(--bg);
}

.mobile-topbar {
  display: none;
  justify-content: space-between;
  align-items: center;
  padding: 20px var(--pad);
}
.mobile-logo {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--ink);
}
.hamburger {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 5px;
  z-index: 1001;
}
.hamburger .bar {
  width: 30px;
  height: 2px;
  background-color: var(--ink);
  transition: all 0.3s ease;
}
.hamburger.active .bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}
.hamburger.active .bar:nth-child(2) {
  transform: translateY(-4px) rotate(-45deg);
}

.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg);
  z-index: 999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s;
}
.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}
.mobile-menu-content {
  display: flex;
  flex-direction: column;
  gap: 30px;
  text-align: center;
}
.mobile-menu-content a, .mobile-menu-content button {
  font-size: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: none;
  border: none;
  font-family: inherit;
  font-weight: 300;
  cursor: pointer;
}

/* contact form style (Carl Sagan) */
.contact-section h2 {
  font-weight: 300; font-size: clamp(3rem, 10vw, 7rem); letter-spacing: -0.04em; line-height: 1; margin-bottom: 60px; text-align: center;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 800px;
  margin: 0 auto;
}
.contact-form input, .contact-form textarea {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: 1px solid var(--faint);
  color: var(--ink);
  font-family: inherit;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.3s;
}
.contact-form input:focus, .contact-form textarea:focus {
  border-color: var(--muted);
}
.contact-form button {
  padding: 22px 32px;
  background: #111;
  color: var(--ink);
  border: 1px solid var(--faint);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.3s, border-color 0.3s;
  align-self: stretch;
}
.contact-form button:hover {
  background: var(--faint);
  border-color: var(--muted);
}
.social-links a {
  color: #ffffff;
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color 0.3s;
  position: relative;
  padding-bottom: 4px;
}
.social-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 0;
  background: #ffffff;
  transition: width 0.3s ease;
}
.social-links a:hover {
  color: var(--ink);
}
.social-links a:hover::after {
  width: 100%;
}

/* ---- hero ---- */
.hero { padding-top: clamp(80px, 16vh, 180px); padding-bottom: clamp(60px, 11vh, 130px); border-top: none; }
.hero .eyebrow { margin-bottom: clamp(40px, 9vh, 90px); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.15em; color: var(--muted); }
.hero h1 {
  font-weight: 300; font-size: clamp(3rem, 9vw, 7.5rem);
  line-height: 1.0; letter-spacing: -0.04em; max-width: 14ch;
}
.hero .sub {
  margin-top: 36px; max-width: 46ch; font-size: clamp(1rem, 1.5vw, 1.18rem);
  color: #BDBCB6; font-weight: 400; line-height: 1.55;
}
.hero .meta { margin-top: clamp(46px, 8vh, 80px); display: flex; gap: 40px; flex-wrap: wrap; }
.hero .meta .item .k { font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.15em; color: var(--faint); margin-bottom: 6px; }
.hero .meta .item .v { font-size: 0.9rem; color: var(--muted); }

/* image wrap for visual breaks */
.hero-image-wrap { width: 100%; padding: 0 var(--pad); max-width: var(--maxw); margin: 0 auto; box-sizing: border-box; }
.hero-image { width: 100%; height: clamp(300px, 50vh, 600px); object-fit: cover; border-radius: 4px; }

/* divider image */
.divider-image-wrap { width: 100%; max-width: 100%; margin: clamp(60px, 10vh, 140px) 0; }
.divider-image { width: 100%; height: clamp(400px, 60vh, 800px); object-fit: cover; }


/* page-load and scroll reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .9s cubic-bezier(.2,.7,.2,1), transform .9s cubic-bezier(.2,.7,.2,1); will-change: transform, opacity; }
.in.reveal, body.in .hero .reveal { opacity: 1; transform: none; }
body.in .hero .d1, .in.d1 { transition-delay: .05s; }
body.in .hero .d2, .in.d2 { transition-delay: .15s; }
body.in .hero .d3, .in.d3 { transition-delay: .25s; }
body.in .hero .d4, .in.d4 { transition-delay: .35s; }

/* Split Layout for detail pages */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.split-layout .proj-grid {
  grid-template-columns: 1fr;
  gap: 15px;
}
.split-layout .anim-side {
  position: sticky;
  top: 120px;
}
@media (max-width: 950px) {
  .split-layout {
    display: flex;
    flex-direction: column;
    gap: 40px;
  }
  .split-layout .anim-side {
    position: static;
    width: 100%;
  }
  .split-layout .text-side {
    width: 100%;
  }
}
body.in .hero .d5, .in.d5 { transition-delay: .45s; }

/* ---- section frame ---- */
section { border-top: 1px solid var(--line); }
.sec { padding-top: clamp(54px, 8vh, 120px); padding-bottom: clamp(54px, 8vh, 120px); }
.sec-head { display: grid; grid-template-columns: 200px 1fr; gap: 30px; align-items: start; }
@media(max-width: 720px) { .sec-head { grid-template-columns: 1fr; gap: 20px; } }

/* about */
.about p { font-size: clamp(1.2rem, 2.5vw, 2rem); font-weight: 300; line-height: 1.4; letter-spacing: -0.01em; max-width: 30ch; color: var(--ink); }
.about .col2 { margin-top: 28px; color: #A2A19B; font-size: 1.05rem; font-weight: 400; line-height: 1.6; max-width: 42ch; }

/* ---- works (visual heavy) ---- */
.works-section .section-label { margin-bottom: clamp(40px, 8vh, 80px); }

.project-block {
  display: flex; align-items: center; gap: 6vw;
  margin-bottom: clamp(80px, 15vh, 180px); cursor: pointer;
}
.project-block:nth-child(even) { flex-direction: row-reverse; }
.project-block:last-child { margin-bottom: 0; }
.project-info { flex: 0 0 35%; margin-bottom: 0; position: relative; }
.project-info h3 { font-weight: 300; font-size: clamp(2rem, 5vw, 4rem); letter-spacing: -0.03em; line-height: 1; margin-bottom: 12px; transition: color 0.3s; }
.project-block:hover .project-info h3 { color: var(--ink); }
.project-info .tags { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); margin-bottom: 20px; }
.project-info .desc { max-width: 60ch; color: #A2A19B; font-size: 1.05rem; line-height: 1.6; }

.project-info .view-details {
  display: inline-block; margin-top: 20px; font-size: 0.8rem; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--ink); opacity: 0; transform: translateX(-10px);
  transition: all 0.4s; font-weight: 500;
}
.project-block:hover .view-details { opacity: 1; transform: translateX(0); }

.project-images { flex: 0 0 55%; width: 100%; display: flex; flex-direction: column; gap: 2vw; overflow: hidden; border-radius: 4px; }
.project-images img { width: 100%; height: auto; border-radius: 2px; box-shadow: 0 10px 40px rgba(0,0,0,0.5); border: 1px solid rgba(255,255,255,0.05); transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1); will-change: transform; }
.project-block:hover .project-images img { transform: scale(1.03); }

@media(max-width: 900px) {
  .project-block, .project-block:nth-child(even) {
    flex-direction: column;
    align-items: flex-start;
  }
  .project-info, .project-images {
    flex: 1 1 auto;
    width: 100%;
  }
  .project-info { margin-bottom: 30px; }
}

/* ---- what i do ---- */
.dolist { display: flex; flex-wrap: wrap; gap: 10px 0; flex-direction: column; }
.dolist .row { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 1px solid var(--line); padding: 20px 0; }
.dolist .row:first-child { border-top: 1px solid var(--line); }
.dolist .row .n { font-size: clamp(1.2rem, 2.8vw, 2rem); font-weight: 300; letter-spacing: -0.02em; }
.dolist .row .x { font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--faint); }

/* ---- experience ---- */
.exp { width: 100%; border-collapse: collapse; border-top: 1px solid var(--line); }
.exp tr { border-bottom: 1px solid var(--line); transition: background-color 0.3s; }
.exp tr:hover { background-color: rgba(255,255,255,0.02); }
.exp td { padding: 24px 0; font-size: 1rem; vertical-align: baseline; }
.exp td.role { color: var(--ink); font-weight: 400; width: 42%; padding-left: 8px; }
.exp td.org { color: var(--muted); width: 38%; }
.exp td.yr { color: var(--faint); text-align: right; font-size: 0.85rem; letter-spacing: 0.06em; width: 20%; padding-right: 8px; }
@media(max-width: 600px) { 
  .exp, .exp tbody, .exp tr, .exp td { display: block; width: 100%; }
  .exp tr { padding: 20px 8px; position: relative; }
  .exp td { padding: 0; border: none; }
  .exp td.role { font-size: 1.1rem; margin-bottom: 4px; width: 100%; }
  .exp td.org { font-size: 0.95rem; color: var(--muted); display: block; margin-bottom: 0; width: 100%; }
  .exp td.yr { text-align: left; position: absolute; top: 20px; right: 8px; font-size: 0.85rem; width: auto; }
}

/* ---- contact ---- */
.contact h2 { font-weight: 300; font-size: clamp(3rem, 10vw, 7rem); letter-spacing: -0.04em; line-height: 1; max-width: 14ch; }
.contact .links { margin-top: 60px; display: flex; flex-wrap: wrap; gap: 14px 40px; }
.contact .links a { font-size: 1rem; color: var(--muted); position: relative; transition: color .25s; padding-bottom: 3px; }
.contact .links a::after { content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 0; background: var(--accent); transition: width .3s; }
.contact .links a:hover, .contact .links a:focus-visible { color: var(--ink); }
.contact .links a:hover::after, .contact .links a:focus-visible::after { width: 100%; }

/* ---- footer ---- */
.foot { border-top: 1px solid var(--line); background-color: var(--bg); }
.foot .big {
  padding-top: clamp(60px, 12vh, 120px); padding-bottom: 40px;
  font-weight: 300; font-size: clamp(3rem, 9.5vw, 12rem); letter-spacing: -0.04em; line-height: 0.85;
  text-align: center;
}
.foot .grid div:nth-child(2) { text-align: center; }
.foot .grid div:nth-child(3) { text-align: right; }
@media(max-width: 560px) {
  .foot .grid { grid-template-columns: 1fr; gap: 0; }
  .foot .grid div { text-align: left !important; padding: 16px 0; border-top: 1px solid var(--line); }
}

@media(prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* custom cursor follower */
html, body { cursor: none; }
a, button, input, textarea, .project-block { cursor: none; }
.cursor-follower {
  position: fixed;
  top: 0;
  left: 0;
  width: 14px;
  height: 14px;
  border: 1.5px solid var(--ink);
  pointer-events: none;
  z-index: 9999;
  will-change: transform;
  transition: background-color 0.2s ease;
}
.cursor-follower.hovered {
  background-color: var(--ink);
}

/* Language Toggle Logic */
html[lang="tr"] .en { display: none !important; }
html[lang="en"] .tr { display: none !important; }


@media (hover: none) and (pointer: coarse) {
  .cursor-follower { display: none; } /* hide on mobile/touch */
}

@media(max-width: 768px) {
  .nav-links { display: none; }
  .mobile-topbar { display: flex; }
  .hero { padding-top: clamp(60px, 12vh, 120px); }
  .hero h1 { word-break: break-word; }
  .topbar-carl { position: fixed; width: 100%; top: 0; left: 0; }
  main { margin-top: 73px; }
}