:root {
  --paper: #f4ede3;
  --paper-lift: #fcf6ee;
  --sand: #e3d5be;
  --ink: #2b241c;
  --ink-soft: #6f6355;
  --ink-faint: #9e9080;
  --clay: #c15e32;
  --clay-deep: #9c4925;
  --sage: #537058;
  --night: #1a1612;
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, "Songti SC", serif;
  line-height: 1.5;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 40;
  opacity: 0.09;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 18px 32px;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid color-mix(in srgb, var(--sand) 55%, transparent);
}

.mark {
  font-size: 15px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  font-weight: 600;
}

.nav nav {
  display: flex;
  gap: 22px;
  font-family: "Avenir Next", "PingFang SC", sans-serif;
  font-size: 14px;
}

.nav nav a { text-decoration: none; color: var(--ink-soft); }
.nav nav a:hover { color: var(--ink); }
.nav-end { margin-left: auto; display: flex; align-items: center; gap: 14px; }

.lang, .nav-cta, .btn, .text-link {
  font-family: "Avenir Next", "PingFang SC", sans-serif;
}

.lang {
  border: 1px solid var(--sand);
  background: transparent;
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 6px 12px;
  cursor: pointer;
}

.nav-cta, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  background: var(--clay);
  color: var(--paper-lift);
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 10px 24px color-mix(in srgb, var(--clay) 28%, transparent);
}

.btn { padding: 16px 28px; font-size: 16px; }
.text-link { color: var(--ink-soft); margin-left: 18px; }

main { overflow: clip; }
section { padding: 92px 32px; max-width: var(--max); margin: 0 auto; scroll-margin-top: 72px; }

.eyebrow, .chapter {
  font-family: "Avenir Next", "PingFang SC", sans-serif;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-size: 12px;
  font-weight: 600;
}

.chapter { margin-bottom: 18px; }
h1, h2, h3 { font-weight: 500; letter-spacing: -0.02em; }
h1 { font-size: clamp(40px, 7vw, 76px); line-height: 1.08; margin: 16px 0 0; }
h1 .soft { color: var(--ink-soft); }
h2 { font-size: clamp(32px, 4.6vw, 52px); line-height: 1.15; margin: 0 0 22px; }
h3 { font-size: 24px; margin: 16px 0 8px; }
.lede, .after { max-width: 38rem; color: var(--ink-soft); font-size: 20px; }
.hero-actions { margin: 32px 0 56px; }

.phones {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 28px;
  max-height: 620px;
  overflow: hidden;
  mask-image: linear-gradient(to bottom, #000 70%, transparent);
}

.phone {
  width: min(300px, 42vw);
  border-radius: 42px;
  overflow: hidden;
  box-shadow:
    0 30px 70px rgba(40, 28, 16, 0.16),
    0 0 0 1px color-mix(in srgb, var(--sand) 70%, transparent);
  background: var(--paper-lift);
}

.phone.small { width: min(240px, 100%); }
.phone.tall,
.pair .phone {
  width: min(320px, 86vw);
  max-height: 540px;
  mask-image: linear-gradient(to bottom, #000 72%, transparent);
}
.tilt-left { transform: rotate(-6deg) translateY(18px); }
.tilt-right { transform: rotate(5deg) translateY(-10px); }
.lift { z-index: 2; }

.dialogue .talk { margin: 36px 0; max-width: 28rem; }
.line {
  margin: 0 0 14px;
  padding: 14px 18px;
  border-radius: 20px;
  font-size: 22px;
}
.line.parent { background: var(--paper-lift); width: fit-content; }
.line.child { background: color-mix(in srgb, var(--sand) 45%, white); margin-left: 48px; width: fit-content; }
.line.faint { color: var(--ink-faint); }

.steps {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin: 48px 0 0;
}

.steps p, .feat-grid p, .plan li, .dont li, .parents li {
  font-family: "Avenir Next", "PingFang SC", sans-serif;
  color: var(--ink-soft);
  font-size: 16px;
}

.feat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px 40px;
  margin: 36px 0 56px;
}

.pair, .parents, .dont-grid, .plans {
  display: grid;
  gap: 36px;
}

.pair { grid-template-columns: 1fr 1fr; justify-items: center; }
.parents { grid-template-columns: 1.1fr 0.9fr; align-items: start; }
.dont-grid { grid-template-columns: 1fr 1fr; }
.plans { grid-template-columns: 1fr 1fr; margin-top: 40px; }

.parents ul, .dont ul, .plan ul {
  padding-left: 18px;
  margin: 0;
}

.plan {
  background: var(--paper-lift);
  border-radius: 28px;
  padding: 32px;
  box-shadow: 0 18px 40px rgba(40, 28, 16, 0.06);
  border: 1px solid color-mix(in srgb, var(--sand) 70%, transparent);
}

.plan.featured { background: var(--night); color: #f0ddd0; }
.plan.featured .plan-note, .plan.featured li { color: #d8c4b0; }
.plan-name {
  font-family: "Avenir Next", "PingFang SC", sans-serif;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 12px;
  margin: 0 0 8px;
}
.plan-cost { font-size: 36px; margin: 0 0 6px; }
.plan-note { margin: 0 0 20px; font-family: "Avenir Next", "PingFang SC", sans-serif; }

footer {
  padding: 72px 32px 48px;
  text-align: center;
  color: var(--ink-soft);
  border-top: 1px solid color-mix(in srgb, var(--sand) 60%, transparent);
}
footer .fine { font-family: "Avenir Next", "PingFang SC", sans-serif; font-size: 13px; color: var(--ink-faint); }

@media (max-width: 860px) {
  .nav nav { display: none; }
  .nav { padding: 14px 18px; }
  section { padding: 64px 20px; }
  h1 { font-size: clamp(34px, 9vw, 48px); }
  .phones {
    flex-direction: column;
    align-items: center;
    max-height: none;
    overflow: visible;
    mask-image: none;
    gap: 20px;
  }
  .tilt-left, .tilt-right { transform: none; }
  .phone { width: min(300px, 78vw); }
  .phones .phone,
  .phone.tall,
  .pair .phone {
    max-height: 460px;
    mask-image: linear-gradient(to bottom, #000 72%, transparent);
  }
  .steps, .feat-grid, .pair, .parents, .dont-grid, .plans { grid-template-columns: 1fr; }
  .hero-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; }
  .text-link { margin-left: 0; }
}