:root {
  --green-950: #062f2a;
  --green-800: #0b4a3f;
  --green-700: #116152;
  --blue-700: #087aa1;
  --blue-500: #20a3c7;
  --sand: #f5f1e8;
  --mist: #eef7f6;
  --ink: #18312f;
  --muted: #617673;
  --line: rgba(10, 55, 50, 0.14);
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(4, 38, 35, 0.14);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-size: 16px;
  line-height: 1.6;
}

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  width: 100%;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(18px);
}

.nav {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 22px;
}

.brand {
  display: grid;
  line-height: 1;
  color: var(--green-950);
  font-weight: 800;
  letter-spacing: 0;
  min-width: max-content;
}

.brand small {
  margin-top: 5px;
  color: var(--blue-700);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.nav-links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--green-950);
  font-size: 14px;
  font-weight: 700;
}

.nav-links a {
  padding: 8px 0;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--green-950);
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-weight: 800;
  font-size: 14px;
  line-height: 1.2;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--green-800);
  color: var(--white);
}

.btn-blue {
  background: var(--blue-700);
  color: var(--white);
}

.btn-light {
  background: var(--white);
  color: var(--green-950);
}

.btn-outline {
  border-color: rgba(255, 255, 255, 0.7);
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--green-950);
  background: var(--white);
}

.hero {
  min-height: 100svh;
  position: relative;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--white);
  background: var(--green-950);
}

.hero.compact {
  min-height: 72svh;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(3, 31, 28, 0.78), rgba(3, 45, 56, 0.38) 52%, rgba(3, 31, 28, 0.08)), linear-gradient(0deg, rgba(2, 28, 25, 0.68), rgba(2, 28, 25, 0.08) 55%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 126px 0 88px;
}

.eyebrow {
  color: var(--blue-500);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 860px;
  margin-bottom: 16px;
  font-size: clamp(44px, 7vw, 92px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  color: var(--green-950);
  font-size: clamp(31px, 4vw, 54px);
  line-height: 1.04;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  color: var(--green-950);
  font-size: 22px;
  line-height: 1.18;
  letter-spacing: 0;
}

.hero p {
  max-width: 650px;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(18px, 2.1vw, 24px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.section {
  padding: 92px 20px;
}

.section.alt {
  background: var(--mist);
}

.section.deep {
  background: var(--green-950);
  color: var(--white);
}

.section.deep h2,
.section.deep h3 {
  color: var(--white);
}

.container {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.section-head {
  max-width: 780px;
  margin-bottom: 34px;
}

.section-head p {
  color: var(--muted);
  font-size: 18px;
}

.section.deep .section-head p,
.section.deep p {
  color: rgba(255, 255, 255, 0.78);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.feature-card,
.area-card,
.course-card,
.purchase-card,
.faq-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 0 rgba(10, 55, 50, 0.04);
}

.feature-card .image,
.course-card .image {
  aspect-ratio: 4 / 3;
}

.feature-card .content,
.course-card .content,
.purchase-card {
  padding: 24px;
}

.feature-card p,
.course-card p,
.area-card p,
.purchase-card p,
.faq-item p {
  color: var(--muted);
}

.area-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.area-card {
  position: relative;
  min-height: 430px;
  display: grid;
  align-items: end;
  color: var(--white);
}

.area-card .image {
  position: absolute;
  inset: 0;
}

.area-card .image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(3, 31, 28, 0.84), rgba(3, 31, 28, 0.1) 68%);
}

.area-card .content {
  position: relative;
  z-index: 1;
  padding: 30px;
}

.area-card h3 {
  color: var(--white);
  font-size: clamp(27px, 3vw, 42px);
}

.area-card p {
  color: rgba(255, 255, 255, 0.83);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.8fr);
  gap: 42px;
  align-items: center;
}

.book-cover {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.check-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 18px;
  padding: 0;
  margin: 24px 0 30px;
  list-style: none;
}

.check-list li {
  font-weight: 800;
}

.check-list li::before {
  content: "✓";
  margin-right: 8px;
  color: var(--blue-500);
}

.preview-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.preview-page {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border-radius: 6px;
  box-shadow: var(--shadow);
  background: var(--sand);
}

.purchase-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.gallery .tile {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border-radius: 8px;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.faq-item {
  padding: 22px;
}

.contact-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: 46px;
  background: var(--green-950);
  color: var(--white);
  border-radius: 8px;
}

.contact-band h2 {
  color: var(--white);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.site-footer {
  padding: 44px 20px 92px;
  background: #052723;
  color: rgba(255, 255, 255, 0.8);
}

.footer-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-weight: 700;
}

.sticky-contact {
  display: none;
}

.language-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 30px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  color: var(--green-950);
  font-weight: 800;
}

@media (max-width: 980px) {
  .nav {
    align-items: flex-start;
  }

  .menu-toggle {
    display: block;
    margin-left: auto;
  }

  .nav-actions {
    display: none;
  }

  .nav-links {
    display: none;
    position: absolute;
    left: 20px;
    right: 20px;
    top: 68px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
  }

  .nav.is-open .nav-links {
    display: flex;
  }

  .nav-links a {
    padding: 12px 4px;
  }

  .card-grid,
  .area-grid,
  .split,
  .purchase-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .preview-strip,
  .gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-band,
  .footer-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 66px 18px;
  }

  .hero-content {
    width: min(100% - 36px, 1180px);
    padding-bottom: 74px;
  }

  h1 {
    font-size: 46px;
  }

  .hero-actions .btn,
  .contact-actions .btn {
    width: 100%;
  }

  .check-list {
    grid-template-columns: 1fr;
  }

  .area-card {
    min-height: 360px;
  }

  .contact-band {
    padding: 28px;
  }

  .sticky-contact {
    position: fixed;
    z-index: 25;
    left: 12px;
    right: 12px;
    bottom: 12px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .sticky-contact .btn {
    box-shadow: 0 10px 30px rgba(3, 31, 28, 0.18);
  }
}