:root {
  --bg: #0b0d10;
  --text: #f4f4f0;
  --muted: #a7a7a0;
  --card: #15181d;
  --line: rgba(255,255,255,0.12);
  --accent: #d6b36a;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 40px;
  background: linear-gradient(to bottom, rgba(0,0,0,0.55), transparent);
}

.logo {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.15em;
}

nav {
  display: flex;
  gap: 24px;
}

nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero {
  height: 220vh;
  position: relative;
  background: #000;
}

.hero video {
  position: sticky;
  top: 0;
  width: 100%;
  height: 100vh;
  object-fit: cover;
  display: block;
  opacity: 0.78;
}

.hero::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle, transparent 20%, rgba(0,0,0,0.55) 100%);
  z-index: 2;
}

.hero-text {
  position: fixed;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  pointer-events: none;
  text-align: center;
  padding: 24px;
  transform-origin: center;
}

.hero-text h1 {
  margin: 0;
  font-size: clamp(42px, 9vw, 120px);
  letter-spacing: 0.08em;
  line-height: 0.95;
}

.hero-text p {
  max-width: 760px;
  color: var(--muted);
  font-size: clamp(16px, 2vw, 22px);
}

.section {
  position: relative;
  z-index: 5;
  padding: 120px 8vw;
  background: var(--bg);
}

.intro {
  padding-top: 150px;
}

.section h2 {
  font-size: clamp(34px, 5vw, 72px);
  max-width: 1050px;
  line-height: 1.02;
  margin: 0 0 32px;
}

.section p {
  max-width: 850px;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.7;
}

.eyebrow {
  color: var(--accent) !important;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 13px !important;
  margin-bottom: 20px;
}

.cards,
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 50px;
}

.cards article,
.project-grid article,
.estimator-box {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 28px;
  min-height: 230px;
}

.cards h3,
.project-grid h3,
.estimator-box h3 {
  margin-top: 0;
  font-size: 24px;
}

.project-grid span {
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0.2em;
}

.dark {
  background: #050607;
}

.estimator-box {
  margin-top: 45px;
  max-width: 760px;
}

button {
  margin-top: 20px;
  padding: 14px 22px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.contact a {
  color: var(--accent);
}

@media (max-width: 900px) {
  .site-header {
    padding: 20px;
  }

  nav {
    display: none;
  }

  .cards,
  .project-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 90px 24px;
  }
}