* {
  box-sizing: border-box;
}

:root {
  --ink: #241f1b;
  --muted: #6f6358;
  --paper: #f7f0e6;
  --sand: #d5b985;
  --clay: #9b5138;
  --reed: #3f6656;
  --sky: #e5eef0;
  --white: #fffaf2;
  --line: rgba(36, 31, 27, 0.14);
  --shadow: 0 18px 45px rgba(36, 31, 27, 0.16);
}

body {
  margin: 0;
  font-family: Arial, "Helvetica Neue", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 240, 230, 0.94);
  backdrop-filter: blur(14px);
}

.nav-wrap,
.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  color: var(--reed);
  font-family: Georgia, serif;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  color: var(--ink);
  font-size: 24px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav a {
  padding: 10px 12px;
  border-radius: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}

.site-nav a:hover,
.site-nav a.active {
  background: var(--white);
  color: var(--ink);
}

.hero {
  position: relative;
  min-height: 620px;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--white);
}

.hero-photo,
.page-hero-photo {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(20, 18, 15, 0.76), rgba(20, 18, 15, 0.18)), url("img/tanais-excavation-1.jpg");
  background-position: center;
  background-size: cover;
}

.hero .container,
.page-hero .container {
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 780px;
  padding: 130px 0 74px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--sand);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.08;
}

h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(42px, 7vw, 86px);
  max-width: 850px;
}

h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(30px, 4vw, 52px);
}

h3 {
  font-size: 22px;
}

.lead {
  max-width: 680px;
  margin: 22px 0 0;
  font-size: 20px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--white);
  border-radius: 6px;
  background: var(--white);
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.button.secondary {
  background: transparent;
  color: var(--white);
}

section {
  padding: 72px 0;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.section-head p {
  max-width: 520px;
  margin: 0;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 18px;
}

.grid.three {
  grid-template-columns: repeat(3, 1fr);
}

.grid.two {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  min-height: 100%;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 8px 22px rgba(36, 31, 27, 0.06);
}

.card p,
.split p,
.timeline p {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: center;
}

.photo-frame {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
  background: var(--sand);
}

.photo-frame img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.timeline {
  display: grid;
  gap: 16px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.timeline-item strong {
  color: var(--clay);
}

.page-hero {
  position: relative;
  display: grid;
  min-height: 360px;
  align-items: end;
  overflow: hidden;
  color: var(--white);
}

.page-hero-photo.alt {
  background-image: linear-gradient(90deg, rgba(20, 18, 15, 0.72), rgba(20, 18, 15, 0.18)), url("img/tanais-excavation-2.jpg");
}

.page-hero-content {
  max-width: 760px;
  padding: 96px 0 56px;
}

.notice {
  padding: 18px 20px;
  border-left: 4px solid var(--reed);
  background: var(--sky);
}

.gallery {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
}

.gallery img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
  border-radius: 8px;
}

.contact-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

form {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  color: var(--ink);
  font: inherit;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.form-button {
  min-height: 46px;
  border: 0;
  border-radius: 6px;
  background: var(--reed);
  color: var(--white);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.site-footer {
  padding: 34px 0;
  border-top: 1px solid var(--line);
  background: #efe2cf;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  gap: 18px;
  color: var(--muted);
}

.footer-grid strong {
  color: var(--ink);
}

.credit-list {
  padding-left: 20px;
  color: var(--muted);
}

@media (max-width: 780px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: var(--shadow);
  }

  .site-nav.open {
    display: flex;
  }

  .hero {
    min-height: 560px;
  }

  .grid.three,
  .grid.two,
  .split,
  .gallery,
  .contact-box,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .section-head {
    display: block;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}