/* Mert Çetin — mrtctns.github.io */

:root {
  --bg:        #07070b;
  --bg-soft:   #0c0c13;
  --ink:       #f2f2f7;
  --ink-dim:   #a6a6b8;
  --ink-faint: #6f6f85;
  --line:      rgba(255,255,255,.09);
  --line-soft: rgba(255,255,255,.055);
  --card:      rgba(255,255,255,.028);
  --violet:    #8b5cf6;
  --cyan:      #22d3ee;
  --pink:      #f472b6;
  --grad:      linear-gradient(115deg, var(--violet), var(--cyan));
  --shell:     min(1140px, 100% - 2.5rem);
  --measure:   820px;
  --ease:      cubic-bezier(.22,1,.36,1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
  -webkit-text-size-adjust: 100%;
  overflow-x: clip;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.65 Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: "Space Grotesk", Inter, sans-serif;
  font-weight: 600;
  letter-spacing: -.02em;
  line-height: 1.12;
  margin: 0;
}

p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
ul, ol { margin: 0; padding: 0; list-style: none; }

::selection { background: rgba(139,92,246,.4); color: #fff; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip {
  position: fixed; top: .75rem; left: .75rem; z-index: 100;
  padding: .6rem 1rem; border-radius: 10px;
  background: var(--violet); color: #fff; font-size: .875rem;
  transform: translateY(-160%);
  transition: transform .2s var(--ease);
}
.skip:focus { transform: none; }

/* ── language switching ─────────────────────────────────────── */

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

/* ── cinematic background ───────────────────────────────────── */

.aurora {
  position: fixed; inset: 0; z-index: 0;
  pointer-events: none; overflow: hidden;
}

.blob {
  position: absolute;
  width: 62vw; height: 62vw;
  min-width: 420px; min-height: 420px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: .5;
  will-change: transform;
}
.b1 { background: radial-gradient(circle, #7c3aed 0%, transparent 68%); top: -22vw; left: -14vw;
      animation: drift1 26s var(--ease) infinite alternate; }
.b2 { background: radial-gradient(circle, #0891b2 0%, transparent 68%); top: 24vh; right: -22vw;
      animation: drift2 32s var(--ease) infinite alternate; }
.b3 { background: radial-gradient(circle, #db2777 0%, transparent 70%); bottom: -28vw; left: 22vw;
      opacity: .32; animation: drift3 38s var(--ease) infinite alternate; }

@keyframes drift1 { to { transform: translate3d(14vw, 10vh, 0) scale(1.15); } }
@keyframes drift2 { to { transform: translate3d(-12vw, -14vh, 0) scale(1.2); } }
@keyframes drift3 { to { transform: translate3d(10vw, -8vh, 0) scale(.85); } }

.grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: radial-gradient(ellipse 80% 55% at 50% 0%, #000 25%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 55% at 50% 0%, #000 25%, transparent 75%);
}

.grain {
  position: absolute; inset: -50%;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
}

body::after {
  content: ""; position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(180deg, transparent 55%, rgba(7,7,11,.85) 100%);
}

.nav, main, .foot { position: relative; z-index: 2; }

/* ── nav ────────────────────────────────────────────────────── */

.nav {
  position: sticky; top: 0; z-index: 50;
  border-bottom: 1px solid transparent;
  transition: background .3s var(--ease), border-color .3s var(--ease);
}
.nav-in {
  display: flex; align-items: center; gap: 1.5rem;
  width: var(--shell); margin: 0 auto;
  padding: 1.1rem 0;
  transition: padding .3s var(--ease);
}
body.scrolled .nav {
  background: rgba(7,7,11,.72);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom-color: var(--line);
}
body.scrolled .nav-in { padding: .7rem 0; }

.brand {
  display: flex; align-items: center; gap: .6rem;
  font-size: .95rem; letter-spacing: -.01em;
  margin-right: auto;
}
.brand b { font-weight: 500; }
.mono {
  display: grid; place-items: center;
  width: 30px; height: 30px; border-radius: 9px;
  background: var(--grad);
  font: 600 12px/1 "Space Grotesk", sans-serif;
  letter-spacing: 0; color: #fff;
  box-shadow: 0 4px 18px rgba(139,92,246,.4);
}

.links { display: flex; gap: 1.75rem; font-size: .9rem; color: var(--ink-dim); }
.links a { position: relative; transition: color .2s; }
.links a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -5px; height: 1px;
  background: var(--grad); transition: right .3s var(--ease);
}
.links a:hover { color: var(--ink); }
.links a:hover::after { right: 0; }

.lang {
  display: flex; padding: 3px; gap: 2px;
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--card); cursor: pointer;
  font: 500 .74rem/1 Inter, sans-serif; letter-spacing: .06em; color: var(--ink-faint);
}
.lang span {
  padding: .42rem .62rem; border-radius: 999px;
  transition: color .2s, background .2s;
}
html[data-lang="tr"] .lang [data-for="tr"],
html[data-lang="en"] .lang [data-for="en"] { background: rgba(255,255,255,.1); color: var(--ink); }

/* ── layout ─────────────────────────────────────────────────── */

/* Every section shares one left gutter; "narrow" only caps the text column,
   so the left edge stays aligned from section to section. */
.wrap { width: var(--shell); margin: 0 auto; }
.wrap.narrow > * { max-width: var(--measure); }
.wrap.center { text-align: center; }
.wrap.center > * { margin-inline: auto; }

.section { padding: clamp(5rem, 12vh, 8.5rem) 0; }
.section.alt { background: linear-gradient(180deg, transparent, rgba(255,255,255,.018), transparent); }

.wrap .head { max-width: 46ch; margin-bottom: 3.25rem; }
.head h2 { font-size: clamp(1.9rem, 4.2vw, 2.75rem); margin-bottom: .85rem; }
.head h2:only-child { margin-bottom: 0; }
.head p { color: var(--ink-dim); font-size: 1.02rem; }

/* ── hero ───────────────────────────────────────────────────── */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 7rem 0 5rem;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: .6rem;
  padding: .45rem 1rem .45rem .7rem;
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--card);
  font-size: .82rem; color: var(--ink-dim);
  margin-bottom: 1.9rem;
}
.dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 10px rgba(139,92,246,.8);
}

.hero h1 {
  font-size: clamp(3.2rem, 12vw, 8rem);
  font-weight: 700; letter-spacing: -.045em;
  background: linear-gradient(100deg, #fff 12%, #cbb8ff 38%, #7dd3fc 62%, #fff 88%);
  background-size: 220% 100%;
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  animation: sweep 9s linear infinite;
  margin-bottom: .35rem;
}
@keyframes sweep { to { background-position: -220% 0; } }

.role {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.05rem, 2.4vw, 1.4rem);
  color: var(--ink-dim); font-weight: 500;
  margin-bottom: 1.75rem;
}

.lede { max-width: 54ch; font-size: clamp(1rem, 1.6vw, 1.14rem); color: var(--ink-dim); }
.lede b { color: var(--ink); font-weight: 600; }

.cta { display: flex; flex-wrap: wrap; gap: .85rem; margin-top: 2.4rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .82rem 1.6rem;
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--card);
  font-size: .94rem; font-weight: 500;
  transition: transform .25s var(--ease), border-color .25s, background .25s;
}
.btn:hover { transform: translateY(-2px); border-color: rgba(255,255,255,.24); background: rgba(255,255,255,.06); }
.btn.primary {
  border-color: transparent; color: #fff;
  background: var(--grad);
  box-shadow: 0 8px 30px -8px rgba(139,92,246,.65);
}
.btn.primary:hover { box-shadow: 0 14px 40px -10px rgba(139,92,246,.8); }
.btn.big { margin-top: 2rem; padding: 1rem 2.2rem; font-size: 1.02rem; }

.stats {
  display: flex; flex-wrap: wrap; gap: 2.75rem;
  margin-top: 4rem; padding-top: 2.25rem;
  border-top: 1px solid var(--line-soft);
}
.stats li { display: flex; flex-direction: column; gap: .2rem; }
.stats b {
  font-family: "Space Grotesk", sans-serif;
  font-size: 2.1rem; font-weight: 700; letter-spacing: -.03em;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stats span { font-size: .84rem; color: var(--ink-faint); }

.scroll {
  position: absolute; left: 50%; bottom: 2.2rem;
  translate: -50% 0;
  width: 22px; height: 36px;
  border: 1px solid var(--line); border-radius: 999px;
}
.scroll span {
  position: absolute; left: 50%; top: 8px;
  width: 3px; height: 7px; border-radius: 2px;
  background: var(--ink-faint);
  animation: wheel 1.9s var(--ease) infinite;
}
@keyframes wheel {
  0%   { opacity: 0; transform: translate(-50%, -4px); }
  40%  { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, 12px); }
}

/* ── apps ───────────────────────────────────────────────────── */

.apps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1rem;
}

/* icon + name + tags only — no description */
.apps.compact { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.apps.compact .app { align-items: center; padding: 1.15rem 1.25rem; }
.apps.compact .meta { display: block; }
.apps.compact h3 { margin-bottom: .5rem; }
.apps.compact .tags { margin-top: 0; padding-top: 0; }
.apps.compact .go { top: 50%; margin-top: -.6rem; }

.app {
  position: relative; isolation: isolate;
  display: flex; gap: 1.15rem; align-items: flex-start;
  padding: 1.35rem;
  border: 1px solid var(--line); border-radius: 20px;
  background: var(--card);
  overflow: hidden;
  transition: transform .4s var(--ease), border-color .4s, background .4s;
}
.app::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  border-radius: inherit; padding: 1px;
  background: var(--grad);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .4s var(--ease);
}
.app::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(340px circle at var(--mx, 50%) var(--my, 0%), rgba(139,92,246,.16), transparent 70%);
  opacity: 0; transition: opacity .4s var(--ease);
}
.app:hover { transform: translateY(-4px); background: rgba(255,255,255,.05); border-color: transparent; }
.app:hover::before, .app:hover::after { opacity: 1; }

.app img {
  width: 62px; height: 62px; flex: none;
  border-radius: 15px;
  border: 1px solid var(--line);
  transition: transform .4s var(--ease);
}
.app:hover img { transform: scale(1.06) rotate(-2deg); }

.app .meta { min-width: 0; display: flex; flex-direction: column; flex: 1; }
.app h3 { font-size: 1.03rem; margin-bottom: .4rem; }
.app p { font-size: .885rem; line-height: 1.6; color: var(--ink-dim); }

/* pinned to the card floor so tags line up across a row */
.tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: auto; padding-top: .85rem; }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .9rem; }
.tags i, .chips i {
  font-style: normal; font-size: .72rem; letter-spacing: .02em;
  padding: .25rem .6rem; border-radius: 999px;
  border: 1px solid var(--line-soft);
  background: rgba(255,255,255,.03);
  color: var(--ink-faint);
}

.go {
  position: absolute; top: 1.15rem; right: 1.25rem;
  font-size: .9rem; color: var(--ink-faint);
  opacity: 0; translate: -4px 4px;
  transition: opacity .3s var(--ease), translate .3s var(--ease), color .3s;
}
.app:hover .go, .post:hover .go { opacity: 1; translate: 0 0; color: var(--cyan); }

/* ── timeline ───────────────────────────────────────────────── */

.timeline { position: relative; padding-left: 1.9rem; }
.timeline::before {
  content: ""; position: absolute; left: 4px; top: .5rem; bottom: .5rem; width: 1px;
  background: linear-gradient(180deg, var(--violet), var(--cyan), transparent);
  opacity: .45;
}
.timeline li { position: relative; padding-bottom: 2.75rem; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: -1.9rem; top: .45rem;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--bg); border: 1.5px solid var(--violet);
}
.timeline li:first-child::before { background: var(--grad); border-color: transparent; box-shadow: 0 0 14px rgba(139,92,246,.85); }

.when {
  display: block; font-size: .76rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--ink-faint); margin-bottom: .4rem;
}
.timeline h3 { font-size: 1.08rem; margin-bottom: .5rem; font-weight: 500; }
.timeline em { font-style: normal; color: var(--ink-dim); }
.timeline p { font-size: .93rem; color: var(--ink-dim); max-width: 60ch; }
.timeline .edu h3 { margin-bottom: 0; }
.timeline h3 + .chips { margin-top: .55rem; }

.stack { margin-top: 3.5rem; padding-top: 2.5rem; border-top: 1px solid var(--line-soft); }
.stack h3 { font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 1.1rem; font-weight: 500; }
.stack ul { display: flex; flex-wrap: wrap; gap: .5rem; }
.stack li {
  padding: .45rem .9rem; border-radius: 10px;
  border: 1px solid var(--line-soft); background: rgba(255,255,255,.028);
  font-size: .84rem; color: var(--ink-dim);
  transition: color .25s, border-color .25s, transform .25s var(--ease);
}
.stack li:hover { color: var(--ink); border-color: rgba(139,92,246,.5); transform: translateY(-2px); }

/* ── writing ────────────────────────────────────────────────── */

.posts { display: grid; gap: .75rem; }
.post {
  position: relative;
  padding: 1.4rem 3rem 1.4rem 1.4rem;
  border: 1px solid var(--line); border-radius: 16px;
  background: var(--card);
  transition: transform .3s var(--ease), border-color .3s, background .3s;
}
.post:hover { transform: translateX(4px); border-color: rgba(255,255,255,.2); background: rgba(255,255,255,.05); }
.post h3 { font-size: 1rem; font-weight: 500; line-height: 1.45; }
.post .when { margin-bottom: .35rem; }
.post .go { top: 50%; margin-top: -.6rem; }

.more {
  display: inline-block; margin-top: 1.75rem;
  font-size: .92rem; color: var(--ink-dim);
  transition: color .2s;
}
.more:hover { color: var(--cyan); }

/* ── contact ────────────────────────────────────────────────── */

#contact .lede { margin: 1.1rem auto 0; }
.big { font-size: clamp(2.4rem, 7vw, 4.25rem); letter-spacing: -.035em; }

.social {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem;
  margin-top: 4rem; padding-top: 2.25rem;
  border-top: 1px solid var(--line-soft);
  font-size: .9rem; color: var(--ink-faint);
}
.social a { transition: color .2s; }
.social a:hover { color: var(--ink); }

/* ── footer ─────────────────────────────────────────────────── */

.foot { border-top: 1px solid var(--line-soft); padding: 2rem 0 2.5rem; }
.foot .wrap {
  display: flex; flex-wrap: wrap; gap: 1rem;
  align-items: center; justify-content: space-between;
  font-size: .82rem; color: var(--ink-faint);
}
.foot nav { display: flex; gap: 1.5rem; }
.foot a { transition: color .2s; }
.foot a:hover { color: var(--ink-dim); }

/* ── reveal on scroll ───────────────────────────────────────── */

.reveal { opacity: 0; transform: translateY(22px); }
.reveal.in {
  opacity: 1; transform: none;
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  transition-delay: var(--d, 0ms);
}
html.no-js .reveal { opacity: 1; transform: none; }

/* ── responsive ─────────────────────────────────────────────── */

@media (max-width: 860px) {
  :root { --shell: min(1140px, 100% - 2rem); }
  .links { display: none; }
  .apps { grid-template-columns: 1fr; }
  .stats { gap: 1.75rem 2.25rem; margin-top: 3rem; }
  .stats b { font-size: 1.75rem; }
  .scroll { display: none; }
  .hero { min-height: auto; padding: 6rem 0 4.5rem; }
}

@media (max-width: 480px) {
  .app { flex-direction: column; gap: .95rem; }
  .foot .wrap { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}