* {
  box-sizing: border-box;
}

:root {
  --bg: #f6f2eb;
  --surface: #ffffff;
  --surface-soft: #fbf8f3;
  --text: #1c1b19;
  --muted: #6d675f;
  --accent: #9a7750;
  --line: rgba(28, 27, 25, 0.12);
  --line-soft: rgba(28, 27, 25, 0.07);
  --shadow: 0 20px 42px rgba(0, 0, 0, 0.08);
  --shadow-soft: 0 10px 24px rgba(0, 0, 0, 0.05);
  --max-width: 1240px;
  --radius: 22px;
  --radius-sm: 16px;
  --transition: 0.28s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* Header */

.site-header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 30;
}

.navbar {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding: 36px 0;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.nav-links li {
  display: flex;
  align-items: center;
}

.nav-links a {
  color: #ffffff;
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  position: relative;
  transition: opacity 0.3s ease;
  opacity: 0.9;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

.nav-links a:hover {
  opacity: 0.7;
}

.menu-btn {
  display: none;
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  border: 0;
  background: rgba(255, 255, 255, 0.18);
  color: #ffffff;
  border-radius: 999px;
  padding: 12px 18px;
  font: inherit;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.menu-btn:hover {
  background: rgba(255, 255, 255, 0.24);
  transform: translateY(-1px);
}

/* Hero */

.hero-section {
  min-height: 100vh;
  background-image:
    linear-gradient(rgba(10, 12, 16, 0.28), rgba(10, 12, 16, 0.45)),
    url("../images/MaletsunyaneFalls.jpg");
  background-size: cover;
  background-position: 65% center;
  display: flex;
  align-items: center;
}

.hero-overlay {
  width: 100%;
}

.hero-content {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding-top: 140px;
  padding-bottom: 90px;
}

.hero-content-centered {
  text-align: center;
  max-width: 940px;
  margin-left: 18%;
  margin-right: auto;
}

.hero-branding {
  text-align: center;
  transform: translateY(-20px);
}

.hero-logo {
  display: block;
  width: auto;
  height: 80px;
  margin: 0 auto 22px;
}

.hero-content h1 {
  margin: 0;
  font-size: clamp(3.4rem, 9vw, 7.6rem);
  font-weight: 600;
  line-height: 0.93;
  letter-spacing: -0.06em;
  color: #ffffff;
}

.hero-subtitle {
  margin: 22px auto 0;
  max-width: 680px;
  font-size: clamp(1.02rem, 2vw, 1.28rem);
  color: rgba(255, 255, 255, 0.94);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.22);
}

/* Shared sections */

main section:not(.hero-section) {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding: 92px 0 0;
  position: relative;
}

main section:not(.hero-section)::before {
  content: "";
  display: block;
  width: 100%;
  max-width: 260px;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    rgba(28, 27, 25, 0.16),
    transparent
  );
  margin: 0 auto 28px;
}

main section.welcome-section::before {
  content: none;
}

.eyebrow {
  margin: 0 0 18px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.82rem;
  color: var(--accent);
}

.section-heading {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.05em;
}

/* Welcome */

.welcome-section {
  padding-top: 90px;
}

.welcome-text-block {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.welcome-text-block h2 {
  margin: 0 auto 28px;
  max-width: 600px;
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: -0.06em;
}

.welcome-text-block p {
  margin: 0 auto 22px;
  max-width: 620px;
  color: var(--muted);
  font-size: 1.05rem;
}

.welcome-text-block p:last-child {
  margin-bottom: 10px;
}

main section.continents-section {
  padding-top: 60px;
}

/* Continents */

.continents-section .section-heading {
  margin-bottom: 4px;
}

.continent-icons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  justify-content: center;
  gap: 30px;
  margin-top: 48px;
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
  justify-items: center;
}

.continent-icon-card a {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 14px;
  padding: 12px 8px;
  border-radius: var(--radius-sm);
  transition: transform var(--transition), background var(--transition);
}

.continent-icon-card a:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.35);
}

.continent-icon {
  width: 100%;
  height: 170px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.continent-icon img {
  max-width: 160px;
  max-height: 130px;
  object-fit: contain;
  filter: grayscale(1) opacity(0.85);
  transition: filter var(--transition), transform var(--transition);
}

.continent-icon-card a:hover .continent-icon img {
  filter: grayscale(0.3) opacity(0.95);
  transform: scale(1.03);
}

.continent-icon-card h3 {
  position: relative;
  margin: 0 auto;
  padding-top: 20px;
  font-size: 1.25rem;
  font-weight: 400;
  line-height: 1.3;
  max-width: 170px;
  min-height: 3em;
}

.continent-icon-card h3::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 50%;
  width: 64px;
  height: 1px;
  background: rgba(28, 27, 25, 0.2);
  transform: translateX(-50%);
}

/* Featured */

.featured-section .section-heading h2 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 46px;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.featured-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.featured-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.12);
}

.featured-card a {
  position: relative;
  display: block;
}

.featured-card img {
  aspect-ratio: 16 / 11;
  object-fit: cover;
}

.featured-card-content {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 22px;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.7),
    rgba(0, 0, 0, 0.04)
  );
  color: #ffffff;
}

.featured-label {
  margin: 0 0 8px;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.88;
}

.featured-card h3 {
  margin: 0;
  font-size: 1.9rem;
  letter-spacing: -0.03em;
}

/* About */

.about-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: center;
}

.about-image-block {
  display: flex;
  justify-content: flex-start;
}

.about-image-block img {
  width: min(100%, 420px);
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.about-text-block {
  max-width: 720px;
  text-align: left;
}

.about-text-block h2 {
  margin: 0 0 22px;
  font-size: clamp(2.2rem, 5vw, 4.5rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.about-text-block p {
  margin: 0 0 20px;
  max-width: 620px;
  color: var(--muted);
  font-size: 1.03rem;
}

.about-text-block a {
  font-weight: 700;
}

/* Footer / Contact */

.site-footer {
  margin-top: 98px;
  padding: 42px 20px 46px;
  background: #111111;
  color: rgba(255, 255, 255, 0.86);
  text-align: center;
}

.footer-contact {
  margin-bottom: 32px;
}

.footer-label {
  margin: 0 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.72);
}

.footer-contact p,
.footer-meta p {
  margin: 8px 0;
}

.footer-meta {
  font-size: 0.95rem;
}

.site-footer a {
  color: #ffffff;
  text-decoration: underline;
}

/* Back to top */

.back-to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 52px;
  height: 52px;
  border: 0;
  border-radius: 999px;
  background: rgba(17, 17, 17, 0.92);
  color: #ffffff;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
  z-index: 70;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.25s ease,
    visibility 0.25s ease,
    transform 0.25s ease,
    background 0.25s ease;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-2px);
  background: #111111;
}

/* Responsive */

@media (max-width: 1024px) {
  .continent-icons-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .featured-grid,
  .about-layout {
    grid-template-columns: 1fr;
  }

  .about-image-block {
    justify-content: flex-start;
  }

  .hero-content-centered {
    margin-left: 8%;
    margin-right: auto;
    max-width: 720px;
  }

  .hero-logo {
    height: 64px;
    margin-bottom: 18px;
  }

  .hero-content {
    padding-top: 130px;
    padding-bottom: 80px;
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 22px 0;
    justify-content: center;
  }

  .hero-section {
    background-position: 60% center;
  }

  .hero-content {
    padding-top: 110px;
    padding-bottom: 70px;
  }

  .hero-content-centered {
    margin-left: auto;
    margin-right: auto;
    max-width: 500px;
  }

  .hero-logo {
    height: 56px;
    margin-bottom: 18px;
  }

  .menu-btn {
    display: inline-flex;
    position: absolute;
    right: 0;
    top: 36px;
    transform: none;
    z-index: 50;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 78px;
    left: 0;
    right: 0;
    z-index: 40;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 20px;
    margin: 0;
    border-radius: 18px;
    background: rgba(20, 20, 20, 0.94);
    backdrop-filter: blur(12px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
  }

  .nav-links.show {
    display: flex;
  }

  .nav-links li {
    width: 100%;
    display: block;
  }

  .nav-links a {
    display: block;
    width: 100%;
    color: #ffffff;
  }

  main section:not(.hero-section) {
    padding-top: 72px;
  }

  main section:not(.hero-section)::before {
    margin-bottom: 34px;
  }

  .continent-icons-grid,
  .featured-grid {
    grid-template-columns: 1fr;
  }

  .continent-icons-grid {
    gap: 18px;
  }

  .welcome-text-block h2,
  .about-text-block h2 {
    max-width: 100%;
  }
}

@media (max-width: 560px) {
  .hero-section {
    background-position: 58% center;
  }

  .hero-content {
    padding-top: 100px;
    padding-bottom: 60px;
  }

  .hero-content-centered {
    max-width: 320px;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-logo {
    height: 46px;
    margin-bottom: 14px;
  }

  .hero-content h1 {
    font-size: clamp(2.4rem, 12vw, 4rem);
  }

  .hero-subtitle {
    max-width: 300px;
    font-size: 0.95rem;
  }

  .menu-btn {
    top: 34px;
    padding: 10px 16px;
    font-size: 0.95rem;
  }

  .nav-links {
    top: 72px;
    padding: 18px;
    gap: 42px;
  }

  .continent-icons-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-image-block img {
    width: min(100%, 260px);
  }

  .welcome-text-block h2,
  .about-text-block h2 {
    font-size: 2.7rem;
  }

  .welcome-text-block p,
  .about-text-block p {
    font-size: 0.98rem;
  }

  .back-to-top {
    right: 14px;
    bottom: 14px;
    width: 48px;
    height: 48px;
  }
}