/* ============================================================
   Biografi — Furkan Göksun
   "Sinema Salonu": warm near-black, projektör ışığı kahraman,
   sodyum-amber tek aksan. Clash Display + Hanken Grotesk.
   Hareket: Lenis + GSAP (main.js). CSS varsayılanları her zaman görünür.
   ============================================================ */

:root {
  color-scheme: dark;

  /* Warm monochrome cinema (OKLCH) */
  --bg:          oklch(0.145 0.006 70);  /* warm near-black */
  --bg-deep:     oklch(0.110 0.005 70);  /* hero/contact edges */
  --surface:     oklch(0.190 0.008 70);
  --surface-2:   oklch(0.235 0.010 70);
  --ink:         oklch(0.955 0.008 85);  /* warm projector white */
  --ink-soft:    oklch(0.82 0.010 75);
  --muted:       oklch(0.66 0.012 70);   /* >=6:1 on bg */
  --accent:      oklch(0.80 0.13 72);    /* sodium amber */
  --accent-bright:oklch(0.87 0.12 80);
  --accent-deep: oklch(0.60 0.12 66);
  --on-accent:   oklch(0.16 0.02 60);    /* dark text on amber fills */
  --line:        oklch(0.955 0.008 85 / 0.14);
  --line-strong: oklch(0.955 0.008 85 / 0.26);

  /* Type */
  --font-display: "Clash Display", Georgia, serif;
  --font-body:    "Hanken Grotesk", system-ui, sans-serif;
  --font-mono:    "Spline Sans Mono", ui-monospace, monospace;

  /* Spacing */
  --sp-sm: 1rem;
  --sp-md: 2rem;
  --sp-lg: 4rem;
  --sp-xl: clamp(5rem, 11vw, 9.5rem);

  --r-sm: 6px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-pill: 999px;

  --measure: 62ch;
  --container: 78rem;
  --gutter: clamp(1.25rem, 5vw, 4.5rem);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-expo: cubic-bezier(0.16, 1, 0.3, 1);

  --beam-amber: oklch(0.80 0.13 72 / 0.30);
  --glow: 0 14px 50px oklch(0.80 0.13 72 / 0.16);

  --z-sticky: 100;
  --z-menu: 210;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
/* Lenis controls scroll; native smooth only as fallback */
html:not(.lenis) { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html:not(.lenis) { scroll-behavior: auto; } }

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: clamp(1rem, 0.95rem + 0.2vw, 1.15rem);
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
ul, ol { list-style: none; padding: 0; }
:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--bg), 0 0 0 6px var(--accent);
  border-radius: var(--r-sm);
}

.skip-link {
  position: absolute; left: 1rem; top: -4rem;
  background: var(--ink); color: var(--bg);
  padding: 0.75rem 1.25rem; border-radius: var(--r-pill);
  font-weight: 600; z-index: 300; transition: top 0.2s var(--ease-out);
}
.skip-link:focus { top: 1rem; }

/* Lenis */
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }

/* ---------- Shared ---------- */
.section__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 1.2rem + 3.4vw, 3.25rem);
  line-height: 1.0;
  letter-spacing: -0.02em;
  text-wrap: balance;
  max-width: 18ch;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body); font-weight: 600; font-size: 1rem;
  letter-spacing: -0.01em;
  padding: 0.95rem 1.7rem;
  border-radius: var(--r-pill);
  border: 1.5px solid transparent;
  text-decoration: none; cursor: pointer;
  transition: transform 0.4s var(--ease-out), background-color 0.25s var(--ease-out),
              box-shadow 0.3s var(--ease-out), color 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--accent { background: var(--accent); color: var(--on-accent); }
.btn--accent:hover { background: var(--accent-bright); box-shadow: var(--glow); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--ink); background: oklch(0.955 0.008 85 / 0.06); }

/* ============================================================
   NAV
   ============================================================ */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: var(--z-sticky);
  background: oklch(0.145 0.006 70 / 0);
  transition: background 0.4s var(--ease-out), border-color 0.4s var(--ease-out), backdrop-filter 0.4s var(--ease-out);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: oklch(0.130 0.006 70 / 0.72);
  backdrop-filter: saturate(1.2) blur(12px);
  border-bottom-color: var(--line);
}
.nav {
  max-width: var(--container); margin-inline: auto;
  padding: 1rem var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-md);
}
.nav__brand { display: inline-flex; align-items: center; gap: 0.6rem; text-decoration: none; font-weight: 600; letter-spacing: -0.01em; font-size: 1.05rem; }
.nav__mark {
  display: grid; place-items: center; width: 1.9rem; height: 1.9rem; border-radius: var(--r-sm);
  background: var(--accent); color: var(--on-accent);
  font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; line-height: 1;
}
.nav__name { white-space: nowrap; }
.nav__links { display: flex; align-items: center; gap: clamp(1rem, 2.4vw, 2.2rem); }
.nav__links a {
  text-decoration: none; font-weight: 500; font-size: 0.96rem; color: var(--ink-soft);
  position: relative; padding-block: 0.35rem; transition: color 0.2s var(--ease-out);
}
.nav__links a:not(.nav__cta)::after {
  content: ""; position: absolute; left: 0; bottom: -1px; width: 100%; height: 2px;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s var(--ease-out);
}
.nav__links a:not(.nav__cta):hover { color: var(--ink); }
.nav__links a:not(.nav__cta):hover::after,
.nav__links a.is-active::after { transform: scaleX(1); }
.nav__links a.is-active { color: var(--accent-bright); }
.nav__cta {
  background: var(--accent); color: var(--on-accent) !important;
  padding: 0.55rem 1.15rem !important; border-radius: var(--r-pill);
  transition: background 0.25s var(--ease-out), box-shadow 0.3s var(--ease-out);
}
.nav__cta:hover { background: var(--accent-bright); box-shadow: var(--glow); }
.nav__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.nav__toggle-bar { display: block; width: 26px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform 0.3s var(--ease-out), opacity 0.2s; }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: 0; z-index: var(--z-menu);
  background: var(--bg-deep);
  display: grid; place-items: center; opacity: 0; pointer-events: none;
  transition: opacity 0.35s var(--ease-out);
}
.mobile-menu::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(60% 50% at 50% 0%, var(--beam-amber), transparent 70%);
}
.mobile-menu.is-open { opacity: 1; pointer-events: auto; }
.mobile-menu__inner { position: relative; display: flex; flex-direction: column; gap: 0.4rem; text-align: center; }
.mobile-menu__inner a {
  font-family: var(--font-display); font-weight: 600; font-size: clamp(2rem, 9vw, 3rem);
  color: var(--ink); text-decoration: none; letter-spacing: -0.01em; line-height: 1.25;
  opacity: 0.9; transition: opacity 0.2s, transform 0.3s var(--ease-out), color 0.2s;
}
.mobile-menu__inner a:hover { opacity: 1; color: var(--accent-bright); transform: translateX(6px); }

/* ============================================================
   HERO — projector light in the dark
   ============================================================ */
.hero {
  position: relative; min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  padding: clamp(6rem, 14vh, 11rem) var(--gutter) clamp(4rem, 8vh, 7rem);
  background: var(--bg-deep); color: var(--ink);
  overflow: hidden; isolation: isolate;
}
/* Warm projector beam from top */
.hero__beam {
  position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(58% 50% at 50% -6%, oklch(0.80 0.13 72 / 0.34), transparent 62%),
    radial-gradient(90% 70% at 50% 120%, oklch(0.110 0.005 70 / 0.9), transparent 70%);
}
.hero__grain {
  position: absolute; inset: 0; z-index: -1; opacity: 0.05; mix-blend-mode: screen;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.hero__inner { max-width: var(--container); margin-inline: auto; width: 100%; }
.hero__hello {
  font-family: var(--font-mono); font-size: 0.9rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 1.4rem;
}
.hero__title {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(2.9rem, 1.4rem + 7.5vw, 5.75rem);
  line-height: 0.96; letter-spacing: -0.025em; text-wrap: balance; max-width: 15ch;
}
.hero__title .hline { display: block; overflow: hidden; padding-bottom: 0.05em; }
.hero__title .hline__in { display: block; }
.hero__title em { font-style: italic; color: var(--accent); font-weight: 600; }
.hero__lead {
  margin-top: 1.7rem; max-width: 46ch;
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.3rem); font-weight: 400; line-height: 1.55;
  color: var(--ink-soft); text-wrap: pretty;
}
.hero__cta { margin-top: 2.4rem; display: flex; flex-wrap: wrap; gap: 0.9rem; }
.hero__hint {
  position: absolute; left: var(--gutter); bottom: 1.8rem;
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); text-decoration: none;
}
.hero__hint svg { animation: nudge 1.9s var(--ease-out) infinite; }
@keyframes nudge { 0%,100%{transform:translateY(0);} 50%{transform:translateY(4px);} }

/* ============================================================
   ABOUT
   ============================================================ */
.about { padding: var(--sp-xl) var(--gutter); }
.about__inner {
  max-width: var(--container); margin-inline: auto;
  display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 5vw, 5rem); align-items: start;
}
.about__media { overflow: hidden; border-radius: var(--r-lg); }
.about__media img { width: 100%; aspect-ratio: 4/5; object-fit: cover; filter: saturate(0.85) contrast(1.05) brightness(0.92); }
.about__prose { margin-top: 1.6rem; max-width: var(--measure); display: grid; gap: 1.1rem; }
.about__prose p { color: var(--ink-soft); text-wrap: pretty; }
.about__prose strong { color: var(--accent); font-weight: 600; }
.about__facts { margin-top: 2.4rem; display: flex; flex-wrap: wrap; gap: 2.5rem; padding-top: 1.6rem; border-top: 1px solid var(--line); }
.about__facts dt { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em; color: var(--muted); margin-bottom: 0.3rem; }
.about__facts dd { font-family: var(--font-display); font-weight: 500; font-size: 1.2rem; letter-spacing: -0.01em; }

/* ============================================================
   WORKS — cinematic gallery (pinned horizontal on desktop w/ JS)
   ============================================================ */
.works { padding: var(--sp-xl) 0; background: var(--bg-deep); position: relative; }
.works__intro { max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); margin-bottom: clamp(2rem, 5vw, 4rem); }
.works__note { color: var(--muted); margin-top: 0.8rem; max-width: 34ch; }
.works__viewport { }
.works__track {
  display: grid; gap: clamp(1.5rem, 4vw, 3rem);
  max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter);
}
.work { }
.work__link { display: grid; gap: 1.25rem; text-decoration: none; color: inherit; }
.work__media { overflow: hidden; border-radius: var(--r-lg); background: var(--surface); }
.work__media img {
  width: 100%; aspect-ratio: 16/10; object-fit: cover;
  filter: saturate(0.9) brightness(0.85);
  transition: transform 0.7s var(--ease-expo), filter 0.5s var(--ease-out);
}
.work__link:hover .work__media img { transform: scale(1.04); filter: saturate(1.05) brightness(1); }
.work__link:hover .work__media { box-shadow: var(--glow); }
.work__title { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.4rem, 1.1rem + 1vw, 2rem); letter-spacing: -0.02em; margin-bottom: 0.5rem; transition: color 0.2s var(--ease-out); }
.work__link:hover .work__title { color: var(--accent-bright); }
.work__desc { color: var(--muted); margin-bottom: 0.85rem; max-width: 44ch; }
.work__tags { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.02em; color: var(--accent); }

/* Pinned horizontal mode — enabled by JS (desktop + GSAP + motion ok) */
html.has-pin .works__viewport { overflow: hidden; }
html.has-pin .works__track {
  display: flex; flex-wrap: nowrap; align-items: center;
  gap: clamp(2rem, 5vw, 5rem); max-width: none; width: max-content;
  padding-inline: max(var(--gutter), calc((100vw - var(--container)) / 2 + var(--gutter)));
}
html.has-pin .work { flex: 0 0 min(78vw, 60rem); }
html.has-pin .work__link { grid-template-columns: 1.25fr 1fr; align-items: center; gap: clamp(1.5rem, 3vw, 3rem); }
html.has-pin .work__media img { aspect-ratio: 4/3; }

/* ============================================================
   SKILLS — slim light strip
   ============================================================ */
.skills { padding: var(--sp-xl) var(--gutter); }
.skills__inner { max-width: var(--container); margin-inline: auto; }
.skills__cols { margin-top: clamp(2.5rem, 5vw, 3.5rem); display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: clamp(2rem, 4vw, 3.5rem); }
.skills__group-title { font-family: var(--font-mono); font-weight: 500; font-size: 0.8rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--accent); padding-bottom: 0.9rem; margin-bottom: 1.1rem; border-bottom: 1px solid var(--line); }
.skills__list { display: grid; gap: 0.6rem; }
.skills__list li { font-family: var(--font-display); font-weight: 500; font-size: clamp(1.1rem, 1rem + 0.5vw, 1.35rem); letter-spacing: -0.01em; color: var(--ink); transition: color 0.2s var(--ease-out), transform 0.25s var(--ease-out); }
.skills__list li:hover { color: var(--accent-bright); transform: translateX(4px); }

/* ============================================================
   JOURNEY
   ============================================================ */
.journey { padding: var(--sp-xl) var(--gutter); background: var(--surface); }
.journey__inner { max-width: var(--container); margin-inline: auto; }
.timeline { margin-top: clamp(2.5rem, 5vw, 4rem); }
.timeline__item { display: grid; grid-template-columns: 7rem 1fr; gap: clamp(1rem, 3vw, 3rem); padding-block: clamp(1.4rem, 3vw, 2.2rem); border-top: 1px solid var(--line); align-items: baseline; }
.timeline__item:last-child { border-bottom: 1px solid var(--line); }
.timeline__year { font-family: var(--font-mono); font-weight: 500; font-size: 0.95rem; color: var(--accent); }
.timeline__content h3 { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.25rem, 1.1rem + 0.6vw, 1.55rem); letter-spacing: -0.01em; margin-bottom: 0.4rem; transition: color 0.2s var(--ease-out); }
.timeline__content p { color: var(--muted); max-width: 52ch; text-wrap: pretty; }
.timeline__item:hover .timeline__content h3 { color: var(--accent-bright); }

/* ============================================================
   CONTACT — the lights come up
   ============================================================ */
.contact { position: relative; padding: var(--sp-xl) var(--gutter); background: var(--bg-deep); overflow: hidden; isolation: isolate; }
.contact__beam { position: absolute; inset: 0; z-index: 0; background: radial-gradient(55% 60% at 50% 120%, var(--beam-amber), transparent 65%); }
/* Interactive projector spotlight — follows the cursor, screen-blended above content.
   Text stays fully readable without it (legibility never depends on the light). */
.contact__spot {
  position: absolute; inset: 0; z-index: 2; pointer-events: none;
  mix-blend-mode: screen;
  /* --mx/--my are unitless numbers (0–100); calc adds the % so GSAP can animate cleanly */
  background:
    radial-gradient(circle 200px at calc(var(--mx, 50) * 1%) calc(var(--my, 30) * 1%), oklch(0.88 0.13 82 / 0.34), transparent 60%),
    radial-gradient(circle 440px at calc(var(--mx, 50) * 1%) calc(var(--my, 30) * 1%), oklch(0.80 0.13 72 / 0.16), transparent 66%);
}
.contact__inner { position: relative; z-index: 1; max-width: 52rem; margin-inline: auto; text-align: center; }
.contact__pre { font-family: var(--font-mono); font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.contact__title { font-family: var(--font-display); font-weight: 600; font-size: clamp(2.1rem, 1.3rem + 3.6vw, 3.5rem); line-height: 1.02; letter-spacing: -0.025em; text-wrap: balance; margin-block: 0.9rem 1.2rem; }
.contact__lead { max-width: 46ch; margin-inline: auto; font-size: 1.1rem; color: var(--ink-soft); text-wrap: pretty; }
.contact__btn { margin-top: 2rem; font-family: var(--font-mono); font-size: 0.95rem; }
.contact__socials { margin-top: 2.4rem; display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: center; }
.contact__socials a { font-weight: 500; text-decoration: none; color: var(--ink); position: relative; padding-bottom: 2px; }
.contact__socials a::after { content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 1.5px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 0.3s var(--ease-out); }
.contact__socials a:hover::after { transform: scaleX(1); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--bg-deep); color: var(--muted); padding: 1.5rem var(--gutter); border-top: 1px solid var(--line); }
.site-footer__inner { max-width: var(--container); margin-inline: auto; display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; font-family: var(--font-mono); font-size: 0.8rem; }
.site-footer__inner a { text-decoration: none; transition: color 0.2s; }
.site-footer__inner a:hover { color: var(--ink); }

/* ============================================================
   PROJECTOR-LENS CURSOR — accompanies the native cursor (not a replacement)
   ============================================================ */
.cursor-lens {
  position: fixed; top: 0; left: 0; width: 300px; height: 300px;
  margin: -150px 0 0 -150px; border-radius: 50%;
  pointer-events: none; z-index: 90; /* above content, below sticky header(100) */
  background: radial-gradient(circle, oklch(0.86 0.13 80 / 0.16), oklch(0.80 0.13 72 / 0.05) 45%, transparent 70%);
  mix-blend-mode: screen; opacity: 0; will-change: transform;
  /* Only opacity transitions in CSS; position + scale are GPU transforms driven by GSAP */
  transition: opacity 0.4s var(--ease-out);
}
html.has-lens .cursor-lens { opacity: 1; }
@media (prefers-reduced-motion: reduce) { .cursor-lens { display: none; } }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 860px) {
  .nav__links { display: none; }
  .nav__toggle { display: flex; }
  .site-header { background: oklch(0.130 0.006 70 / 0.72); backdrop-filter: saturate(1.2) blur(12px); }
  .about__inner { grid-template-columns: 1fr; }
  .about__media { max-width: 24rem; }
  body.menu-open { overflow: hidden; }
}
@media (max-width: 540px) {
  .timeline__item { grid-template-columns: 1fr; gap: 0.4rem; }
  .hero__cta .btn { flex: 1 1 auto; }
  .about__facts { gap: 1.75rem; }
}

/* ============================================================
   TOUCH TARGETS — comfortable tap areas on coarse pointers only
   (desktop pointer layout unchanged)
   ============================================================ */
@media (pointer: coarse) {
  .contact__socials { gap: 0.5rem 1.75rem; }
  .contact__socials a { padding-block: 0.6rem; }
  .nav__links a { padding-block: 0.7rem; }
  .site-footer__inner a { padding-block: 0.5rem; }
}

/* ============================================================
   REDUCED MOTION — kill all motion, content fully visible
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .hero__hint svg { animation: none; }
  .work__media img, .skills__list li, .mobile-menu__inner a, .nav__links a::after, .contact__socials a::after { transition: none; }
}