/* Keskin Yapı İnşaat Malzemeleri — koyu tema */
:root {
  --bg: #0e0f11;
  --bg-2: #16181b;
  --bg-3: #1d2024;
  --line: #2b2f34;
  --text: #c9c6c0;
  --muted: #8d8a85;
  --white: #f4f2ee;
  --accent: #c4a27c;      /* bronz / kum */
  --accent-2: #d8b994;
  --wa: #25a35a;
  --head: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --body: "Inter", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { font-family: var(--body); color: var(--text); background: var(--bg); font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.wrap { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: var(--head); color: var(--white); line-height: 1.12; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.1rem, 4.2vw, 3.4rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3vw, 2.5rem); font-weight: 700; }
h3 { font-size: 1.08rem; font-weight: 600; }
.eyebrow { font-family: var(--head); font-size: .76rem; font-weight: 600; letter-spacing: .18em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; }
.muted { color: var(--muted); }

.btn { display: inline-block; font-family: var(--head); font-weight: 600; font-size: .92rem; letter-spacing: .02em; padding: 14px 26px; border: 1.5px solid transparent; transition: background .2s, color .2s, border-color .2s; }
.btn--accent { background: var(--accent); color: #111; }
.btn--accent:hover { background: var(--accent-2); }
.btn--line { border-color: #4a4f55; color: var(--white); }
.btn--line:hover { border-color: var(--white); }

/* Üst şerit ve menü */
.topbar { background: #08090a; font-size: .82rem; color: var(--muted); border-bottom: 1px solid var(--line); }
.topbar__in { display: flex; justify-content: space-between; gap: 16px; padding-top: 8px; padding-bottom: 8px; }
.topbar__left { display: flex; gap: 20px; }
.topbar__left a:first-child { color: var(--white); }
.topbar a:hover { color: var(--accent); }
.topbar .sep { opacity: .35; margin: 0 10px; }

.header { position: sticky; top: 0; z-index: 50; background: rgba(14,15,17,.96); border-bottom: 1px solid var(--line); }
.header__in { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.logo { display: flex; align-items: center; gap: 12px; color: var(--white); }
.logo__mark { width: 42px; height: 42px; }
.logo__text { display: flex; flex-direction: column; line-height: 1; font-family: var(--head); }
.logo__text strong { font-size: 1.2rem; font-weight: 800; letter-spacing: .04em; }
.logo__text small { font-size: .62rem; font-weight: 600; letter-spacing: .26em; color: var(--accent); margin-top: 6px; }
.nav { display: flex; align-items: center; gap: 34px; font-family: var(--head); font-weight: 500; font-size: .95rem; }
.nav a:not(.btn) { color: var(--white); position: relative; }
.nav a:not(.btn)::after { content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px; background: var(--accent); transition: width .2s; }
.nav a:not(.btn):hover::after { width: 100%; }
.nav__cta { padding: 11px 20px; }
.burger { display: none; background: none; border: 0; cursor: pointer; width: 40px; height: 40px; padding: 8px; }
.burger span { display: block; height: 2px; background: var(--white); margin: 5px 0; }

/* Giriş */
.hero { padding: 40px 0 0; }
.hero__img img { width: 100%; aspect-ratio: 2 / 1; object-fit: cover; object-position: 50% 40%; }
.hero__text { display: grid; grid-template-columns: 6fr 5fr; gap: 56px; align-items: end; margin-top: 48px; }
.hero__text .lead { font-size: 1.06rem; color: var(--muted); margin-bottom: 28px; max-width: 32em; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.strip { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 72px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.strip > div { padding: 26px 24px; border-left: 1px solid var(--line); }
.strip > div:first-child { border-left: 0; padding-left: 0; }
.strip strong { display: block; font-family: var(--head); color: var(--white); }
.strip span { font-size: .9rem; color: var(--muted); }

/* Bölümler */
.section { padding: 110px 0; }
.section--alt { background: var(--bg-2); }
.section__head { margin-bottom: 40px; }
.section__head--split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: end; }

/* Katalog */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.filter { background: transparent; color: var(--text); border: 1px solid var(--line); padding: 10px 18px; font-family: var(--head); font-size: .86rem; font-weight: 500; cursor: pointer; transition: all .2s; }
.filter:hover { border-color: var(--muted); color: var(--white); }
.filter.is-active { background: var(--white); border-color: var(--white); color: #111; }

.catalog { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.item { background: var(--bg-2); border: 1px solid var(--line); display: flex; flex-direction: column; transition: border-color .2s, transform .2s; }
.item:hover { border-color: #4a4f55; transform: translateY(-2px); }
.item[hidden] { display: none; }
.item__img { aspect-ratio: 4 / 3; overflow: hidden; background: var(--bg-3); }
.item__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.item:hover .item__img img { transform: scale(1.04); }
.item__body { padding: 18px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.item__cat { font-size: .7rem; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }
.item h3 { margin-bottom: 6px; }
.item p { font-size: .88rem; color: var(--muted); line-height: 1.55; }
.item__ask { margin-top: auto; padding-top: 14px; font-family: var(--head); font-size: .85rem; font-weight: 600; color: var(--white); }
.item__ask:hover { color: var(--accent); }

.brands { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--line); }
.brands__label { font-size: .88rem; color: var(--muted); }
.brands__list { font-family: var(--head); font-weight: 700; font-size: 1.15rem; color: var(--white); letter-spacing: .06em; display: flex; align-items: center; gap: 18px; }
.brands__list i { width: 6px; height: 6px; background: var(--accent); transform: rotate(45deg); }

/* Hakkımızda */
.about { display: grid; grid-template-columns: 5fr 7fr; gap: 56px; }
.about__body p { margin-bottom: 18px; max-width: 38em; }
.about__body strong { color: var(--white); }
.owners { display: grid; grid-template-columns: 1fr 1fr; margin-top: 36px; border-top: 2px solid var(--accent); }
.owner { padding: 20px 0; }
.owner + .owner { padding-left: 28px; border-left: 1px solid var(--line); }
.owner__role { display: block; font-size: .76rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.owner__name { font-family: var(--head); font-size: 1.4rem; font-weight: 700; color: var(--white); }

/* Çağrı */
.cta { background: var(--accent); color: #1a1a1a; padding: 64px 0; }
.cta__in { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta h2 { color: #111; }
.cta p { margin-top: 8px; }
.cta__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.cta .btn--accent { background: #111; color: var(--white); }
.cta .btn--accent:hover { background: #2a2a2a; }
.cta .btn--line { border-color: #111; color: #111; }
.cta .btn--line:hover { background: #111; color: var(--white); }

/* İletişim */
.contact { display: grid; grid-template-columns: 5fr 7fr; gap: 56px; }
.contact__list { margin: 32px 0 36px; border-top: 1px solid var(--line); }
.contact__list > div { display: grid; grid-template-columns: 90px 1fr; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.contact__list dt { font-size: .76rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); padding-top: 3px; }
.contact__list dd { color: var(--white); display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; }
.contact__list dd a:first-child { font-weight: 600; }
.contact__list dd a:hover { color: var(--accent); }
.wa { font-size: .76rem; font-weight: 600; color: var(--wa) !important; border: 1px solid currentColor; padding: 2px 10px; }
.wa:hover { background: var(--wa); color: #fff !important; }
.contact__map { min-height: 420px; background: var(--bg-2); }
.contact__map iframe { width: 100%; height: 100%; min-height: 420px; border: 0; filter: grayscale(1) invert(.9) contrast(.9); }

/* Alt bilgi */
.footer { background: #08090a; color: var(--muted); padding: 40px 0; font-size: .88rem; border-top: 1px solid var(--line); }
.footer__in { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; }
.footer__brand strong { display: block; font-family: var(--head); color: var(--white); letter-spacing: .06em; }
.footer__links { display: flex; flex-wrap: wrap; gap: 24px; }
.footer__links a:hover { color: var(--white); }

.wa-float { position: fixed; right: 22px; bottom: 22px; z-index: 60; width: 56px; height: 56px; border-radius: 50%; background: var(--wa); color: #fff; display: grid; place-items: center; box-shadow: 0 6px 18px rgba(0,0,0,.4); transition: transform .2s; }
.wa-float:hover { transform: scale(1.06); }
.wa-float svg { width: 30px; height: 30px; }

@media (max-width: 1080px) {
  .catalog { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 960px) {
  .hero__text, .about, .contact, .section__head--split { grid-template-columns: 1fr; gap: 28px; }
  .strip { grid-template-columns: 1fr 1fr; }
  .strip > div:nth-child(3) { border-left: 0; padding-left: 0; }
  .strip > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .catalog { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 80px 0; }
}
@media (max-width: 760px) {
  .wrap { padding: 0 16px; }
  .topbar__right { display: none; }
  .burger { display: block; }
  .nav { position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: var(--bg); border-bottom: 1px solid var(--line); display: none; }
  .nav.is-open { display: flex; }
  .nav a:not(.btn) { padding: 16px; border-top: 1px solid var(--line); }
  .nav a:not(.btn)::after { display: none; }
  .nav__cta { margin: 12px 16px 16px; text-align: center; }
  .header__in { height: 66px; }
  .logo__mark { width: 36px; height: 36px; }

  .hero { padding-top: 0; }
  .hero > .wrap:first-child { padding: 0; }
  .hero__img img { aspect-ratio: 4 / 3; object-position: 38% 50%; }
  .hero__text { padding: 0 16px; margin-top: 28px; gap: 18px; }
  .strip { grid-template-columns: 1fr; margin-top: 48px; }
  .strip > div { border-left: 0 !important; padding: 18px 0 !important; border-bottom: 1px solid var(--line); }
  .strip > div:last-child { border-bottom: 0; }

  .filters { flex-wrap: nowrap; overflow-x: auto; margin: 0 -16px 24px; padding: 0 16px 4px; scrollbar-width: none; }
  .filters::-webkit-scrollbar { display: none; }
  .filter { white-space: nowrap; flex-shrink: 0; }
  .catalog { grid-template-columns: 1fr 1fr; gap: 12px; }
  .item__body { padding: 12px 12px 14px; }
  .item p { display: none; }
  .item h3 { font-size: .95rem; }
  .item__cat { font-size: .62rem; }

  .owners { grid-template-columns: 1fr; }
  .owner + .owner { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .contact__list > div { grid-template-columns: 1fr; gap: 4px; }
  .contact__map, .contact__map iframe { min-height: 320px; }
  .footer__in { flex-direction: column; align-items: flex-start; }
}