:root {
  --ink: #15231d;
  --forest: #1c3328;
  --forest-deep: #0e1914;
  --gold: #c19a43;
  --gold-soft: #d8ba73;
  --paper: #f5f2e9;
  --paper-deep: #e8e3d6;
  --white: #fffdf7;
  --line: rgba(28, 51, 40, 0.16);
  --line-dark: rgba(255, 255, 255, 0.16);
  --shadow: 0 24px 70px rgba(15, 32, 24, 0.14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Manrope", Arial, sans-serif;
  line-height: 1.65;
}
a { color: inherit; }
a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--gold-soft);
  outline-offset: 4px;
}
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 1000;
  padding: 10px 14px;
  color: var(--forest-deep);
  background: var(--white);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }
.wrap { width: min(1180px, calc(100% - 80px)); margin: 0 auto; }
.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  min-height: 72px;
  padding: 0 3.5vw;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--white);
  background: rgba(9, 12, 11, 0.4);
  backdrop-filter: blur(10px);
}
.site-logo {
  color: var(--white);
  font-family: Georgia, serif;
  font-size: 1.03rem;
  font-weight: 600;
  letter-spacing: 0.38em;
  text-decoration: none;
  text-transform: uppercase;
}
.site-logo span { color: var(--gold); }
.desktop-nav { display: flex; justify-content: center; gap: clamp(18px, 3vw, 46px); }
.desktop-nav a {
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-decoration: none;
  text-transform: uppercase;
}
.desktop-nav a:hover,
.desktop-nav a:focus-visible { color: var(--gold-soft); }
.site-phone {
  color: var(--white);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
}
.mobile-menu { display: none; }
.hero {
  position: relative;
  display: flex;
  min-height: 820px;
  align-items: center;
  overflow: hidden;
  color: var(--white);
  background:
    url("assets/hero-communication-charging-v2.webp") center / cover no-repeat,
    var(--forest-deep);
}
.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 12, 10, 0.94) 0%, rgba(7, 12, 10, 0.72) 40%, rgba(7, 12, 10, 0.2) 74%, rgba(7, 12, 10, 0.25) 100%),
    linear-gradient(0deg, rgba(7, 12, 10, 0.6), transparent 48%);
}
.hero-content { position: relative; z-index: 2; padding-top: 118px; }
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 92px;
  padding: 0;
  color: rgba(255, 255, 255, 0.64);
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  list-style: none;
  text-transform: uppercase;
}
.breadcrumbs li + li::before { margin-right: 10px; color: var(--gold); content: "/"; }
.breadcrumbs a { text-decoration: none; }
.eyebrow {
  display: block;
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}
h1, h2, h3 {
  margin-top: 0;
  font-family: "Cormorant Garamond", Georgia, serif;
  font-weight: 500;
  line-height: 1.04;
}
.hero h1 {
  max-width: 820px;
  margin: 24px 0 28px;
  font-size: clamp(4rem, 7vw, 7.1rem);
  letter-spacing: -0.045em;
}
.hero h1 em { display: block; color: var(--gold-soft); font-weight: 500; }
.hero-copy {
  max-width: 720px;
  margin: 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(1.05rem, 1.6vw, 1.28rem);
  line-height: 1.75;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 38px; }
.button {
  display: inline-flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  padding: 0 30px;
  border: 1px solid transparent;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-decoration: none;
  text-transform: uppercase;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: #181710; background: var(--gold); }
.button-primary:hover,
.button-primary:focus-visible { background: var(--gold-soft); }
.button-ghost { border-color: rgba(255,255,255,.44); color: var(--white); background: rgba(0,0,0,.08); }
.button-ghost:hover,
.button-ghost:focus-visible { border-color: var(--white); background: rgba(255,255,255,.08); }
.opening { padding: 110px 0; background: var(--white); }
.opening-grid,
.offline-grid,
.weather-grid,
.before-trip-grid {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  gap: 90px;
  align-items: start;
}
.opening h2,
.section-heading h2,
.offline h2,
.weather h2,
.before-trip h2 {
  margin: 18px 0 0;
  font-size: clamp(2.8rem, 5vw, 5rem);
  letter-spacing: -.035em;
}
.prose { max-width: 690px; font-size: 1.08rem; }
.prose p { margin: 0; }
.prose p + p { margin-top: 22px; }
.signal,
.energy,
.mistakes { padding: 116px 0; }
.signal,
.mistakes { background: var(--paper); }
.section-heading { max-width: 840px; margin-bottom: 54px; }
.section-heading > p {
  max-width: 720px;
  margin: 20px 0 0;
  color: rgba(21,35,29,.7);
  font-size: 1.03rem;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 22px;
}
.feature-grid article,
.energy-grid article,
.mistake-grid article {
  position: relative;
  min-height: 300px;
  padding: 42px;
  border: 1px solid var(--line);
  background: var(--white);
}
.card-number {
  color: rgba(28,51,40,.14);
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 3.8rem;
  line-height: 1;
}
.feature-grid h3,
.energy-grid h3,
.mistake-grid h3,
.group-grid h3,
.kit-grid h3 {
  margin: 22px 0 14px;
  font-size: 2rem;
}
.kit,
.group { padding: 122px 0; color: var(--white); background: var(--forest-deep); }
.section-heading.light h2 { color: var(--white); }
.kit-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0,1fr));
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}
.kit-grid article {
  min-height: 340px;
  padding: 32px 26px;
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}
.kit-grid article > span,
.offline ol li > span {
  color: var(--gold);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .2em;
}
.kit-grid p,
.group-grid p { color: rgba(255,255,255,.7); }
.offline { padding: 116px 0; background: var(--paper-deep); }
.offline-intro { position: sticky; top: 40px; }
.offline-intro > p { max-width: 470px; margin-top: 24px; color: rgba(21,35,29,.7); }
.offline ol { margin: 0; padding: 0; list-style: none; }
.offline li {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 18px;
  padding: 30px 0;
  border-top: 1px solid var(--line);
}
.offline li:last-child { border-bottom: 1px solid var(--line); }
.offline h3 { margin: 0 0 8px; font-size: 2rem; }
.offline p { margin: 0; }
.energy { background: var(--white); }
.energy-grid,
.mistake-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 22px;
}
.energy-grid article { min-height: 250px; box-shadow: var(--shadow); }
.weather { padding: 116px 0; background: var(--paper); }
.weather-copy { max-width: 680px; font-size: 1.04rem; }
.weather-copy p { margin: 0; }
.weather-copy p + p { margin-top: 22px; }
.group-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  margin-top: 54px;
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}
.group-grid article {
  min-height: 320px;
  padding: 40px 34px;
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}
.mistake-grid article { min-height: 230px; }
.conversion {
  position: relative;
  padding: 140px 0;
  overflow: hidden;
  color: var(--white);
  background:
    url("assets/hero-communication-charging-v2.webp") center 55% / cover no-repeat,
    var(--forest-deep);
}
.conversion-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8,15,11,.95), rgba(8,15,11,.73) 55%, rgba(8,15,11,.3));
}
.conversion-content { position: relative; z-index: 2; max-width: 850px; margin-left: max(40px, calc((100vw - 1180px)/2)); }
.conversion h2 { margin: 18px 0 20px; font-size: clamp(3rem,6vw,6rem); letter-spacing: -.04em; }
.conversion p { max-width: 700px; color: rgba(255,255,255,.78); font-size: 1.06rem; }
.before-trip { padding: 104px 0; background: var(--white); }
.before-trip p { margin-top: 0; font-size: 1.04rem; }
.before-trip ul { display: grid; gap: 10px; padding-left: 20px; }
.before-trip a { text-decoration-color: var(--gold); text-underline-offset: 4px; }
.site-footer { padding: 64px 0; color: var(--white); background: #080e0b; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 54px; align-items: start; }
.footer-grid p { max-width: 420px; color: rgba(255,255,255,.6); }
.footer-grid nav { display: grid; gap: 10px; }
.footer-grid nav a { color: rgba(255,255,255,.72); text-decoration: none; }
.footer-contact { display: grid; gap: 10px; justify-items: end; }
.footer-contact a { color: var(--white); font-weight: 700; text-decoration: none; }
.footer-contact span { color: var(--gold-soft); }

@media (max-width: 1020px) {
  .desktop-nav,
  .site-phone { display: none; }
  .site-header { grid-template-columns: 1fr auto; }
  .mobile-menu { display: block; position: relative; }
  .mobile-menu summary { display: grid; gap: 5px; padding: 14px; cursor: pointer; list-style: none; }
  .mobile-menu summary::-webkit-details-marker { display: none; }
  .mobile-menu summary span { display: block; width: 26px; height: 2px; background: var(--white); }
  .mobile-menu nav {
    position: absolute;
    top: 54px;
    right: 0;
    display: grid;
    min-width: 220px;
    padding: 18px;
    color: var(--white);
    background: var(--forest-deep);
    box-shadow: var(--shadow);
  }
  .mobile-menu nav a { padding: 10px; text-decoration: none; }
  .kit-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 760px) {
  .wrap { width: min(100% - 40px, 1180px); }
  .hero { min-height: 760px; background-position: 62% center; }
  .hero h1 { font-size: clamp(3.2rem, 15vw, 5.4rem); }
  .breadcrumbs { margin-bottom: 64px; }
  .opening-grid,
  .offline-grid,
  .weather-grid,
  .before-trip-grid { grid-template-columns: 1fr; gap: 42px; }
  .feature-grid,
  .group-grid { grid-template-columns: 1fr; }
  .offline-intro { position: static; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-contact { justify-items: start; }
  .conversion-content { margin-left: 20px; }
}

@media (max-width: 560px) {
  .site-header { min-height: 64px; padding: 0 20px; }
  .site-logo { font-size: .82rem; letter-spacing: .28em; }
  .hero { min-height: 730px; }
  .hero-content { padding-top: 104px; }
  .hero-copy { font-size: 1rem; }
  .hero-actions { display: grid; }
  .button { width: 100%; padding: 0 18px; }
  .opening,
  .signal,
  .energy,
  .weather,
  .mistakes,
  .before-trip { padding: 76px 0; }
  .kit,
  .group { padding: 82px 0; }
  .kit-grid,
  .energy-grid,
  .mistake-grid { grid-template-columns: 1fr; }
  .kit-grid article { min-height: auto; }
  .feature-grid article,
  .energy-grid article,
  .mistake-grid article { min-height: auto; padding: 32px 26px; }
  .offline li { grid-template-columns: 42px 1fr; }
  .conversion { padding: 96px 0; }
  .conversion-content { width: calc(100% - 40px); margin: 0 auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}