:root {
  --bg: #272727;
  --bg-deep: #1e1e1e;
  --bg-raise: #2f2f2f;
  --gold: #c5a47e;
  --gold-dim: #86774c;
  --text: #ffffff;
  --muted: #a8a8a8;
  --line: rgba(255, 255, 255, 0.07);

  --font-body: 'Montserrat', sans-serif;
  --font-head: 'Oswald', sans-serif;

  --pad-x: clamp(16px, 6vw, 120px);
  --section-y: clamp(80px, 10vw, 150px);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --header-h: 96px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 70px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 300 15px/1.8 var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--font-head); font-weight: 400; margin: 0; letter-spacing: 0.02em; }
:focus-visible { outline: 1px solid var(--gold); outline-offset: 4px; }
[hidden] { display: none !important; }
main, .footer { transition: opacity .6s var(--ease); }
.is-loading main, .is-loading .footer { opacity: 0; }
.contact__info dd, .about__body p { white-space: pre-line; }

.container { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 var(--pad-x); position: relative; z-index: 1; }

/* ---------- Izgara çizgileri & sol şerit ---------- */
.grid-lines { position: fixed; inset: 0; display: flex; justify-content: space-evenly; pointer-events: none; z-index: 0; }
.grid-lines span { width: 1px; background: var(--line); }

.side-rail {
  position: fixed; left: 0; bottom: 0; width: 70px; z-index: 40;
  display: flex; flex-direction: column; align-items: center; gap: 18px; padding-bottom: 32px;
}
.side-rail__line { width: 1px; height: 70px; background: rgba(255,255,255,.3); }
.side-rail svg { width: 16px; height: 16px; fill: none; stroke: var(--muted); stroke-width: 1.6; stroke-linecap: round; transition: stroke .3s; }
.side-rail a:hover svg { stroke: var(--gold); }

/* ---------- Header ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  height: var(--header-h); padding: 0 var(--pad-x);
  display: flex; align-items: center; justify-content: space-between;
  transition: height .4s var(--ease), background .4s;
}
.header.is-scrolled { height: 70px; background: rgba(30, 30, 30, .94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }

.logo { display: flex; align-items: center; gap: 12px; }
.logo__mark { width: 40px; height: 40px; fill: none; stroke: var(--gold); stroke-width: 1.5; stroke-linejoin: round; }
.logo__img { height: 44px; width: auto; max-width: 200px; object-fit: contain; }
.logo__text { font: 500 22px/1 var(--font-head); letter-spacing: .3em; display: flex; flex-direction: column; }
.logo__text small { font: 400 9px/1 var(--font-body); letter-spacing: .55em; color: var(--gold); margin-top: 6px; }

.nav { display: flex; gap: clamp(18px, 2.4vw, 38px); }
.nav a {
  font: 600 11px/1 var(--font-body); text-transform: uppercase; letter-spacing: .18em;
  position: relative; padding: 8px 0; transition: color .3s;
}
.nav a::after { content: ''; position: absolute; left: 0; bottom: 0; height: 1px; width: 100%; background: var(--gold); transform: scaleX(0); transform-origin: right; transition: transform .4s var(--ease); }
.nav a:hover, .nav a.is-active { color: var(--gold); }
.nav a:hover::after, .nav a.is-active::after { transform: scaleX(1); transform-origin: left; }

.nav-toggle { display: none; background: none; border: 0; width: 34px; height: 24px; position: relative; cursor: pointer; padding: 0; }
.nav-toggle span { position: absolute; left: 0; height: 1px; width: 100%; background: var(--text); transition: transform .3s, opacity .3s; }
.nav-toggle span:nth-child(1) { top: 2px; }
.nav-toggle span:nth-child(2) { top: 11px; width: 70%; }
.nav-toggle span:nth-child(3) { top: 20px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* ---------- Butonlar ---------- */
.btn {
  display: inline-block; cursor: pointer;
  font: 600 11px/1 var(--font-body); letter-spacing: .25em; text-transform: uppercase;
  padding: 18px 42px; border: 1px solid var(--gold); color: var(--text); background: transparent;
  position: relative; overflow: hidden; z-index: 0; transition: color .4s;
}
.btn::before { content: ''; position: absolute; inset: 0; background: var(--gold); transform: translateX(-101%); transition: transform .5s var(--ease); z-index: -1; }
.btn:hover { color: var(--bg-deep); }
.btn:hover::before { transform: translateX(0); }
.btn--solid { background: var(--gold); color: var(--bg-deep); }
.btn--solid::before { background: var(--text); }

.link { font: 600 11px/1 var(--font-body); letter-spacing: .2em; text-transform: uppercase; color: var(--gold); display: inline-flex; align-items: center; gap: 12px; }
.link::after { content: ''; width: 30px; height: 1px; background: currentColor; transition: width .4s var(--ease); }
.link:hover::after { width: 54px; }

/* ---------- Hero ---------- */
.hero { position: relative; height: 100vh; min-height: 620px; overflow: hidden; background: var(--bg-deep); }
.hero__slide {
  position: absolute; inset: 0; display: flex; align-items: center;
  padding: 0 var(--pad-x) 0 calc(var(--pad-x) + 40px);
  opacity: 0; visibility: hidden; transition: opacity 1.2s var(--ease), visibility 1.2s;
}
.hero__slide::before {
  content: ''; position: absolute; inset: 0;
  background: var(--img) center / cover no-repeat, var(--bg-deep);
  transform: scale(1.12); transition: transform 7s linear;
}
.hero__slide::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(20,20,20,.88) 0%, rgba(20,20,20,.5) 55%, rgba(20,20,20,.25) 100%); }
.hero__slide.is-active { opacity: 1; visibility: visible; }
.hero__slide.is-active::before { transform: scale(1); }

.hero__content { position: relative; z-index: 2; max-width: 640px; }
.hero__content > * { opacity: 0; transform: translateY(30px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.hero__slide.is-active .hero__content > * { opacity: 1; transform: none; }
.hero__slide.is-active .hero__content > :nth-child(2) { transition-delay: .15s; }
.hero__slide.is-active .hero__content > :nth-child(3) { transition-delay: .3s; }
.hero__slide.is-active .hero__content > :nth-child(4) { transition-delay: .45s; }

.hero__eyebrow { display: block; font: 500 12px/1 var(--font-body); letter-spacing: .35em; text-transform: uppercase; color: var(--gold); margin-bottom: 26px; }
.hero__title { font-size: clamp(48px, 8vw, 112px); line-height: .98; text-transform: uppercase; font-weight: 500; }
.hero__title em { font-style: normal; font-weight: 300; color: transparent; -webkit-text-stroke: 1px var(--text); }
.hero__text { max-width: 460px; color: #d0d0d0; margin: 28px 0 40px; }

.hero__controls { position: absolute; right: var(--pad-x); bottom: 48px; z-index: 3; display: flex; align-items: center; gap: 28px; }
.hero__arrow { background: none; border: 0; cursor: pointer; color: var(--text); font: 600 11px/1 var(--font-body); letter-spacing: .25em; text-transform: uppercase; padding: 8px 0; transition: color .3s; }
.hero__arrow:hover { color: var(--gold); }
.hero__counter { font: 300 14px/1 var(--font-head); letter-spacing: .1em; color: var(--muted); }
.hero__counter b { font-weight: 500; font-size: 26px; color: var(--gold); }

.hero__scroll { position: absolute; left: 50%; bottom: 36px; z-index: 3; width: 22px; height: 36px; border: 1px solid rgba(255,255,255,.4); border-radius: 12px; transform: translateX(-50%); }
.hero__scroll span { position: absolute; left: 50%; top: 8px; width: 2px; height: 7px; margin-left: -1px; background: var(--gold); animation: scrollDot 1.8s infinite; }
@keyframes scrollDot { 0% { opacity: 0; transform: translateY(0); } 40% { opacity: 1; } 100% { opacity: 0; transform: translateY(12px); } }

/* ---------- Bölüm ortakları ---------- */
.section { position: relative; padding: var(--section-y) 0; overflow: hidden; }
.section::before {
  content: attr(data-bg); position: absolute; top: calc(var(--section-y) * .25); left: -1vw;
  font: 600 clamp(90px, 17vw, 260px)/1 var(--font-head); letter-spacing: -.01em;
  color: rgba(255,255,255,.025); white-space: nowrap; pointer-events: none;
}
.section__eyebrow { display: block; font: 500 11px/1 var(--font-body); letter-spacing: .35em; text-transform: uppercase; color: var(--gold); margin-bottom: 18px; }
.section__title { font-size: clamp(34px, 4.5vw, 56px); text-transform: uppercase; line-height: 1.05; }
.section__head { margin-bottom: clamp(48px, 6vw, 80px); }
.section__head--row { display: flex; justify-content: space-between; align-items: flex-end; flex-wrap: wrap; gap: 30px; }
.lead { font-size: 18px; line-height: 1.7; color: var(--text); font-weight: 400; }
p { color: var(--muted); }

/* ---------- Kurumsal ---------- */
.about__grid { display: grid; grid-template-columns: 5fr 6fr; gap: clamp(40px, 7vw, 110px); align-items: center; }
.about__media { position: relative; }
.about__media img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; background: var(--bg-raise); filter: grayscale(.35); }
.about__media::before { content: ''; position: absolute; inset: 28px -28px -28px 28px; border: 1px solid var(--gold-dim); z-index: -1; }
.about__badge { position: absolute; right: -28px; bottom: 48px; background: var(--gold); color: var(--bg-deep); padding: 22px 26px; display: flex; align-items: center; gap: 14px; }
.about__badge b { font: 500 54px/1 var(--font-head); }
.about__badge span { font: 600 10px/1.5 var(--font-body); letter-spacing: .2em; text-transform: uppercase; }
.about__body .section__title { margin-bottom: 30px; }

.values { list-style: none; padding: 0; margin: 44px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.values li { background: var(--bg); padding: 24px 22px; transition: background .4s; }
.values li:hover { background: var(--bg-raise); }
.values b { display: block; font: 400 16px/1 var(--font-head); letter-spacing: .2em; text-transform: uppercase; color: var(--gold); margin-bottom: 10px; }
.values span { font-size: 13px; color: var(--muted); line-height: 1.6; }

/* ---------- Faaliyet Alanları ---------- */
.services { background: var(--bg-deep); }
.services__list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.service { background: var(--bg); border: 1px solid var(--line); display: flex; flex-direction: column; transition: transform .5s var(--ease), border-color .4s; }
.service:hover { transform: translateY(-8px); border-color: var(--gold-dim); }
.service__img { aspect-ratio: 4 / 3; background: var(--img) center / cover no-repeat, var(--bg-raise); filter: grayscale(.6); transition: filter .6s; }
.service:hover .service__img { filter: grayscale(0); }
.service__body { padding: 36px 34px 40px; position: relative; flex: 1; }
.service__no { position: absolute; top: -34px; right: 30px; font: 500 64px/1 var(--font-head); color: var(--gold); }
.service h3 { font-size: 28px; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 16px; }
.service ul { list-style: none; padding: 20px 0 0; margin: 20px 0 0; border-top: 1px solid var(--line); }
.service li { font-size: 13px; padding: 6px 0 6px 22px; position: relative; color: #d0d0d0; }
.service li::before { content: ''; position: absolute; left: 0; top: 50%; width: 10px; height: 1px; background: var(--gold); }

/* ---------- Sayaçlar ---------- */
.stats { position: relative; z-index: 1; padding: 70px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg); }
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.stat { text-align: center; }
.stat b { display: block; font: 400 clamp(40px, 5vw, 64px)/1 var(--font-head); color: var(--gold); }
.stat span { font: 600 11px/1 var(--font-body); letter-spacing: .25em; text-transform: uppercase; color: var(--muted); display: block; margin-top: 14px; }

/* ---------- Projeler ---------- */
.filters { display: flex; gap: 26px; flex-wrap: wrap; }
.filters button { background: none; border: 0; cursor: pointer; color: var(--muted); font: 600 11px/1 var(--font-body); letter-spacing: .2em; text-transform: uppercase; padding: 8px 0; border-bottom: 1px solid transparent; transition: color .3s, border-color .3s; }
.filters button:hover, .filters button.is-active { color: var(--gold); border-color: var(--gold); }

.projects__grid { display: grid; grid-template-columns: repeat(3, 1fr); grid-auto-rows: 300px; gap: 20px; grid-auto-flow: dense; }
.project { position: relative; overflow: hidden; background: var(--bg-raise); }
.project--tall { grid-row: span 2; }
.project--wide { grid-column: span 2; }
.project img { width: 100%; height: 100%; object-fit: cover; transition: transform 1s var(--ease), filter .6s; filter: grayscale(.5) brightness(.8); }
.project:hover img { transform: scale(1.07); filter: grayscale(0) brightness(.65); }
.project__info { position: absolute; left: 0; right: 0; bottom: 0; padding: 30px; background: linear-gradient(transparent, rgba(0,0,0,.75)); }
.project__info span { font: 600 10px/1 var(--font-body); letter-spacing: .25em; text-transform: uppercase; color: var(--gold); }
.project__info h3 { font-size: 22px; text-transform: uppercase; letter-spacing: .06em; margin-top: 10px; transform: translateY(6px); transition: transform .5s var(--ease); }
.project:hover .project__info h3 { transform: none; }
.project.is-hidden { display: none; }

/* ---------- Haberler ---------- */
.news { background: var(--bg-deep); }

/* ---------- İletişim ---------- */
.contact__grid { display: grid; grid-template-columns: 4fr 6fr; gap: clamp(40px, 7vw, 110px); }
.contact__info { margin: 40px 0 0; }
.contact__info dt { font: 600 10px/1 var(--font-body); letter-spacing: .3em; text-transform: uppercase; color: var(--gold); margin-top: 28px; }
.contact__info dd { margin: 10px 0 0; color: #d0d0d0; }
.contact__info a:hover { color: var(--gold); }

.form { display: grid; gap: 26px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.form label { display: grid; gap: 10px; font: 600 10px/1 var(--font-body); letter-spacing: .25em; text-transform: uppercase; color: var(--muted); }
.form input, .form select, .form textarea {
  font: 300 15px/1.6 var(--font-body); color: var(--text); background: transparent;
  border: 0; border-bottom: 1px solid rgba(255,255,255,.2); padding: 10px 0; border-radius: 0; resize: vertical;
  transition: border-color .3s;
}
.form select option { background: var(--bg-deep); }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--gold); }
.form .is-invalid { border-color: #d27a6a; }
.form__msg { margin: 0; min-height: 1.5em; font-size: 13px; color: var(--gold); }
.form .btn { justify-self: start; }

/* ---------- Footer ---------- */
.footer { position: relative; z-index: 1; background: #181818; padding: 48px 0; border-top: 1px solid var(--line); }
.footer__inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.footer nav { display: flex; gap: 28px; flex-wrap: wrap; }
.footer nav a { font: 600 10px/1 var(--font-body); letter-spacing: .2em; text-transform: uppercase; color: var(--muted); transition: color .3s; }
.footer nav a:hover { color: var(--gold); }
.footer small { color: #6e6e6e; font-size: 12px; }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .services__list { grid-template-columns: 1fr; max-width: 640px; }
  .about__grid, .contact__grid { grid-template-columns: 1fr; }
  .about__media { max-width: 520px; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); row-gap: 50px; }
}

@media (max-width: 860px) {
  :root { --header-h: 76px; }
  .side-rail { display: none; }
  .nav-toggle { display: block; z-index: 2; }
  .nav {
    position: fixed; inset: 0; background: var(--bg-deep);
    flex-direction: column; justify-content: center; align-items: center; gap: 30px;
    opacity: 0; visibility: hidden; transition: opacity .4s, visibility .4s;
  }
  .nav.is-open { opacity: 1; visibility: visible; }
  .nav a { font-size: 14px; }
  .hero__slide { padding: 0 var(--pad-x); }
  .hero__controls { left: var(--pad-x); right: auto; }
  .hero__scroll { display: none; }
  .projects__grid { grid-template-columns: 1fr 1fr; grid-auto-rows: 240px; }
  .project--wide { grid-column: span 2; }
}

@media (max-width: 560px) {
  .projects__grid { grid-template-columns: 1fr; }
  .project--tall { grid-row: span 1; }
  .project--wide { grid-column: span 1; }
  .values, .form__row { grid-template-columns: 1fr; }
  .about__badge { right: 0; }
  .about__media::before { inset: 16px -12px -16px 12px; }
  .grid-lines span:nth-child(odd) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}