:root {
  --black: #000;
  --white: #fff;
  --gold: #c9a24b;
  --gold-dark: #b08c3c;
  --grey: #a3a3a3;
  --line: rgba(255, 255, 255, .18);
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  margin: 0;
  background: var(--black);
  color: var(--white);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--sans); font-weight: 700; line-height: 1.15; letter-spacing: -.02em; margin: 0; }
p { margin: 0; }

.wrap { width: min(1080px, 100% - 40px); margin-inline: auto; }

:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 15px 28px;
  font: 700 15px/1 var(--sans);
  text-decoration: none;
  border: 1.5px solid transparent;
  border-radius: 2px;
  transition: background .2s, color .2s, border-color .2s;
}
.btn--gold { background: var(--gold); color: var(--black); }
.btn--gold:hover { background: var(--gold-dark); }
.btn--line { border-color: var(--white); color: var(--white); }
.btn--line:hover { background: var(--white); color: var(--black); }
.btn--sm { padding: 11px 20px; font-size: 14px; }

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(0, 0, 0, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header__in { display: flex; align-items: center; justify-content: space-between; padding-block: 12px; }
.brand img { width: 150px; }
.nav { display: flex; align-items: center; gap: 32px; }
.nav a:not(.btn) { text-decoration: none; font-weight: 500; color: var(--grey); transition: color .2s; }
.nav a:not(.btn):hover { color: var(--white); }

.burger { display: none; background: none; border: 0; padding: 10px; cursor: pointer; }
.burger span { display: block; width: 26px; height: 2px; background: var(--white); }
.burger span + span { margin-top: 7px; }

/* Hero */
.hero { padding: clamp(80px, 14vw, 170px) 0 clamp(70px, 11vw, 130px); }
.hero h1 { font-size: clamp(34px, 5.6vw, 66px); max-width: 18ch; letter-spacing: -.03em; line-height: 1.1; }
.hero h1 span { display: block; color: var(--grey); font-weight: 500; }
.hero__lead { max-width: 52ch; margin-top: 28px; font-size: 18px; color: #d4d4d4; }
.hero__cta, .contact__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 40px; }

/* Services (white section) */
.services { background: var(--white); color: var(--black); padding: clamp(60px, 9vw, 110px) 0; }
.services h2 { font-size: clamp(28px, 4vw, 40px); margin-bottom: 36px; }
.service {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: 24px 48px;
  padding: 34px 0;
  border-top: 1.5px solid var(--black);
}
.service:last-child { border-bottom: 1.5px solid var(--black); }
.service h3 { font-size: clamp(20px, 2.4vw, 26px); }
.service p { color: #3a3a3a; max-width: 56ch; }

/* About */
.about { padding: clamp(70px, 10vw, 120px) 0; }
.about__in { max-width: 760px; }
.about h2 { font-size: clamp(26px, 3.8vw, 38px); }
.about p { margin: 24px 0 32px; color: #d4d4d4; }

/* Contact */
.contact { padding: clamp(70px, 10vw, 120px) 0; border-top: 1px solid var(--line); }
.contact h2 { font-size: clamp(28px, 4.6vw, 48px); }
.contact__lead { margin-top: 20px; color: #d4d4d4; }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 26px 0; font-size: 14px; color: var(--grey); }
.footer__in { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer a { text-decoration: none; }
.footer a:hover { color: var(--white); }

/* Mobile */
@media (max-width: 760px) {
  body { font-size: 16px; }
  .burger { display: block; }
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding: 24px 20px 28px;
    background: var(--black);
    border-bottom: 1px solid var(--line);
  }
  .nav.is-open { display: flex; }
  .brand img { width: 125px; }
  .service { grid-template-columns: 1fr; gap: 12px; padding: 28px 0; }
  .btn { width: 100%; text-align: center; }
  .btn--sm { width: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}