@font-face {
  font-family: "App HarmonyOS Sans SC";
  src: url("assets/HarmonyOS-Sans-SC-Medium.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "App Noto Sans KR";
  src: url("assets/NotoSansKR-VF.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  unicode-range: U+1100-11FF, U+302E-302F, U+3130-318F, U+3200-321E, U+3260-327F, U+A960-A97F, U+AC00-D7FF, U+FFA0-FFDC;
}

:root {
  --green-950: #0e2d1c;
  --green-900: #123a24;
  --green-800: #16512e;
  --green-700: #176a39;
  --green-600: #238449;
  --green-500: #38a85b;
  --green-200: #b8dec1;
  --green-100: #dfeee3;
  --green-50: #eff7f1;
  --paper: #f4f8f5;
  --white: #fff;
  --ink: #132a1b;
  --muted: #607267;
  --line: #dbe6de;
  --coral: #e88062;
  --yellow: #e2ad46;
  --blue: #547aa5;
  --header-height: 72px;
  --container: 1180px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "App Noto Sans KR", "App HarmonyOS Sans SC", "Noto Sans KR", "Apple SD Gothic Neo", system-ui, sans-serif;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

body.menu-open { overflow: hidden; }

a { color: inherit; text-decoration: none; }
button, summary { font: inherit; }
button { border: 0; cursor: pointer; }
img, svg { display: block; }
.icon-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
svg:not(.icon-sprite) { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.skip-link {
  position: fixed;
  z-index: 200;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  background: var(--ink);
  color: white;
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  height: var(--header-height);
  background: rgba(244, 248, 245, .94);
  border-bottom: 1px solid rgba(23, 106, 57, .1);
  backdrop-filter: blur(16px);
}

.header-inner {
  width: min(calc(100% - 48px), var(--container));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
}

.brand { display: inline-flex; align-items: center; min-width: 188px; }
.brand img { width: 42px; height: 42px; object-fit: contain; }
.brand-name { margin-left: 9px; font-size: 21px; font-weight: 800; }
.brand-reading { margin-left: 9px; padding-left: 9px; border-left: 1px solid #b9c9be; color: var(--muted); font-size: 10px; font-weight: 700; }

.desktop-nav { display: flex; gap: 34px; margin: auto; }
.desktop-nav a { position: relative; padding: 25px 0; color: #3d5546; font-size: 14px; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 18px; height: 2px; background: var(--green-600); transition: right .25s ease; }
.desktop-nav a:hover::after, .desktop-nav a:focus-visible::after { right: 0; }

.header-cta {
  min-width: 132px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--ink);
  color: var(--white);
  border-radius: 6px;
  font-size: 13px;
  transition: background .2s, transform .2s;
}
.header-cta:hover { background: var(--green-700); transform: translateY(-1px); }
.header-cta svg { width: 17px; height: 17px; }
.menu-button, .mobile-nav { display: none; }

.hero {
  position: relative;
  height: calc(100svh - 118px);
  min-height: 620px;
  max-height: 760px;
  overflow: hidden;
  background: #eaf3ec;
  border-bottom: 1px solid var(--green-100);
}

.hero::before {
  content: "";
  position: absolute;
  right: -4%;
  top: 0;
  width: 56vw;
  height: 100%;
  background: #d4e8d9;
  border: 1px solid rgba(23,106,57,.1);
  clip-path: polygon(22% 0, 100% 0, 100% 100%, 0 100%);
}

.hero::after {
  content: "";
  position: absolute;
  right: 4%;
  top: 0;
  width: 1px;
  height: 100%;
  opacity: .15;
  background: #6e9a7c;
  box-shadow: -46px 0 #6e9a7c, -92px 0 #6e9a7c, -138px 0 #6e9a7c, -184px 0 #6e9a7c, -230px 0 #6e9a7c, -276px 0 #6e9a7c, -322px 0 #6e9a7c, -368px 0 #6e9a7c, -414px 0 #6e9a7c, -460px 0 #6e9a7c;
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: min(calc(100% - 48px), var(--container));
  height: 100%;
  margin: 0 auto;
}

.word-cloud span {
  position: absolute;
  z-index: 1;
  left: var(--x);
  top: var(--y);
  color: rgba(23,106,57,.075);
  font-family: "App Noto Sans KR", sans-serif;
  font-size: calc(30px * var(--s));
  font-weight: 750;
  white-space: nowrap;
  animation: word-drift 8s ease-in-out infinite alternate;
}
.word-cloud span:nth-child(2n) { animation-delay: -2.4s; }
.word-cloud span:nth-child(3n) { animation-delay: -4.8s; }
@keyframes word-drift { from { translate: 0 -3px; } to { translate: 8px 7px; } }

.dancheong-band { position: absolute; z-index: 5; top: 0; left: 0; right: 0; height: 5px; display: grid; grid-template-columns: repeat(12, 1fr); overflow: hidden; }
.dancheong-band i:nth-child(4n+1) { background: #176a39; }
.dancheong-band i:nth-child(4n+2) { background: #d65f4a; }
.dancheong-band i:nth-child(4n+3) { background: #e0ad45; }
.dancheong-band i:nth-child(4n) { background: #406e93; }

.hero-copy {
  position: absolute;
  z-index: 4;
  top: 50%;
  left: 0;
  width: min(49%, 560px);
  transform: translateY(-54%);
}

.eyebrow, .section-index {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--green-700);
  font-size: 12px;
  font-weight: 700;
}
.eyebrow span { width: 30px; height: 1px; background: currentColor; }
.hero h1 { margin: 10px 0 0; font-size: clamp(80px, 8.5vw, 132px); line-height: .95; font-weight: 900; }
.hero-korean { margin: 16px 0 0; color: var(--green-700); font-size: 18px; font-weight: 650; }
.hero-lead { max-width: 500px; margin: 23px 0 0; color: #405748; font-size: 17px; line-height: 1.9; }
.hero-actions { margin-top: 30px; display: flex; align-items: center; gap: 26px; }

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 22px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
}
.button-primary { background: var(--green-700); color: white; box-shadow: 0 12px 28px rgba(23,106,57,.18); transition: background .2s, transform .2s, box-shadow .2s; }
.button-primary:hover { background: var(--green-800); transform: translateY(-2px); box-shadow: 0 16px 32px rgba(23,106,57,.23); }
.text-link { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); font-size: 14px; font-weight: 700; }
.text-link svg { width: 18px; transition: transform .2s; }
.text-link:hover svg { transform: translateX(4px); }
.hero-note { display: flex; align-items: center; gap: 8px; margin-top: 18px; color: #708177; font-size: 11px; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green-500); box-shadow: 0 0 0 4px rgba(56,168,91,.12); }
.korean-seal { position: absolute; left: -62px; bottom: -34px; width: 43px; height: 58px; padding: 6px 4px; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 1px solid #c95d4a; color: #b84f3f; font-family: "App Noto Sans KR", sans-serif; text-align: center; transform: rotate(-5deg); }
.korean-seal::after { content: ""; position: absolute; inset: 3px; border: 1px solid rgba(184,79,63,.5); }
.korean-seal strong, .korean-seal span { position: relative; z-index: 1; font-size: 8px; line-height: 1.5; }

.hero-product { position: absolute; z-index: 3; top: 0; right: 3%; width: 46%; height: 100%; perspective: 1000px; }
.product-caption { position: absolute; right: -28px; top: 50%; color: rgba(19,42,27,.34); font-size: 8px; font-weight: 700; writing-mode: vertical-rl; }
.phone { --tilt-x: 0deg; --tilt-y: 0deg; position: absolute; right: 13%; bottom: -74px; width: 295px; height: 615px; filter: drop-shadow(0 32px 36px rgba(14,45,28,.2)); transform: rotateX(var(--tilt-x)) rotateY(var(--tilt-y)); transform-style: preserve-3d; transition: transform .18s ease-out; }
.phone-frame { position: relative; width: 100%; height: 100%; padding: 9px; overflow: hidden; background: #14241a; border: 2px solid #32453a; border-radius: 42px; }
.phone-status { position: absolute; z-index: 20; top: 15px; left: 0; width: 100%; padding: 0 25px; display: flex; align-items: center; justify-content: space-between; color: var(--ink); font-size: 9px; font-weight: 800; }
.phone-island { position: absolute; left: 50%; top: -2px; width: 82px; height: 22px; border-radius: 16px; background: #14241a; transform: translateX(-50%); }
.phone-screen { position: absolute; inset: 9px; overflow: hidden; background: #f7faf7; border-radius: 32px; opacity: 0; transform: translateY(12px); pointer-events: none; transition: opacity .35s, transform .35s; }
.phone-screen.is-active { opacity: 1; transform: translateY(0); pointer-events: auto; }
.home-indicator { position: absolute; z-index: 22; left: 50%; bottom: 14px; width: 98px; height: 4px; border-radius: 4px; background: #233b2d; transform: translateX(-50%); }

.app-head { padding: 54px 20px 0; display: flex; align-items: flex-start; justify-content: space-between; }
.app-head span { color: #789080; font-size: 9px; }
.app-head h2 { margin: 5px 0 0; font-size: 18px; }
.app-head img { width: 38px; height: 38px; }
.progress-ring { width: 160px; height: 160px; margin: 38px auto 0; display: grid; place-items: center; border: 14px solid #e4eee7; border-top-color: var(--green-600); border-right-color: var(--green-600); border-radius: 50%; transform: rotate(30deg); }
.progress-ring div { display: flex; flex-direction: column; align-items: center; transform: rotate(-30deg); }
.progress-ring strong { font-size: 43px; line-height: 1; }
.progress-ring span { margin-top: 4px; color: #74887b; font-size: 10px; }
.progress-copy { margin: 20px 20px 14px; text-align: center; color: #718279; font-size: 10px; }
.app-primary { width: calc(100% - 40px); height: 45px; margin: 0 20px; display: flex; align-items: center; justify-content: center; gap: 8px; background: var(--green-700); color: white; border-radius: 7px; font-size: 11px; font-weight: 700; }
.app-primary svg { width: 14px; height: 14px; }
.app-shortcuts { margin: 12px 20px; display: grid; grid-template-columns: 1fr 1fr; border: 1px solid #dfe9e1; border-radius: 7px; }
.app-shortcuts span { padding: 10px 6px; color: #708177; text-align: center; font-size: 8px; }
.app-shortcuts span + span { border-left: 1px solid #dfe9e1; }
.app-shortcuts b { margin-right: 3px; color: var(--green-700); font-size: 15px; }
.app-nav { position: absolute; left: 0; right: 0; bottom: 0; height: 72px; display: grid; grid-template-columns: repeat(4,1fr); padding-top: 12px; background: white; border-top: 1px solid #e8eeea; }
.app-nav span { display: flex; flex-direction: column; align-items: center; gap: 4px; color: #96a39a; font-size: 7px; }
.app-nav i { width: 15px; height: 15px; border: 2px solid currentColor; border-radius: 4px; }
.app-nav .active { color: var(--green-700); }

.review-top { padding: 52px 18px 0; display: flex; align-items: center; justify-content: space-between; }
.review-top button { width: 28px; height: 28px; background: transparent; color: var(--ink); font-size: 21px; }
.review-top span { font-size: 10px; color: #718279; }
.review-meter { height: 4px; margin: 14px 20px 0; overflow: hidden; background: #e1ebe3; border-radius: 4px; }
.review-meter i { display: block; width: 50%; height: 100%; background: var(--green-600); }
.word-card { margin: 52px 18px 0; text-align: center; }
.word-type { display: inline-block; padding: 5px 8px; color: var(--green-700); background: var(--green-50); border-radius: 4px; font-size: 8px; }
.word-card > strong { display: block; margin-top: 18px; font-size: 32px; }
.pronunciation { display: block; margin-top: 4px; color: #7b8b81; font-size: 10px; }
.word-divider { width: 24px; height: 2px; margin: 22px auto; background: var(--green-500); }
.word-card p { margin: 0; font-size: 16px; font-weight: 800; }
.word-card small { display: block; margin-top: 18px; color: #718279; font-size: 10px; }
.review-actions { position: absolute; left: 16px; right: 16px; bottom: 40px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 5px; }
.review-actions button { height: 54px; border: 1px solid #d9e5dc; border-radius: 6px; background: white; color: #476052; font-size: 9px; }
.review-actions button:last-child { border-color: var(--green-700); background: var(--green-700); color: white; }
.review-actions small { display: block; margin-top: 4px; opacity: .7; font-size: 7px; }

.dictionary-head { padding: 53px 20px 0; display: flex; align-items: center; justify-content: space-between; }
.dictionary-head h2 { margin: 0; font-size: 18px; }
.dictionary-head span { color: var(--green-700); font-size: 9px; }
.search-box { height: 40px; margin: 17px 18px 0; display: flex; align-items: center; gap: 8px; padding: 0 12px; background: #e9f0eb; border-radius: 6px; color: var(--ink); font-size: 11px; }
.search-box svg { width: 14px; color: #6d8174; }
.search-box i { margin-left: auto; color: #819087; font-style: normal; }
.dictionary-result { margin: 15px 18px 0; }
.result-badge { color: var(--green-700); font-size: 8px; }
.dictionary-result h3 { margin: 6px 0 0; font-size: 28px; }
.dictionary-result > p { margin: 2px 0 0; color: #809087; font-size: 9px; }
.meaning { margin-top: 23px; display: flex; gap: 10px; }
.meaning b { width: 20px; height: 20px; display: grid; place-items: center; border-radius: 50%; background: var(--green-700); color: white; font-size: 8px; }
.meaning span { display: flex; flex-direction: column; }
.meaning strong { font-size: 12px; }
.meaning small { margin-top: 6px; color: #738379; font-size: 8px; }
.example { margin-top: 21px; padding: 13px; background: #eaf3ec; border-left: 3px solid var(--green-500); color: #3f5748; font-size: 9px; line-height: 1.6; }
.example small { display: block; color: #809087; }
.dictionary-result button { width: 100%; height: 40px; margin-top: 17px; display: flex; align-items: center; justify-content: center; gap: 7px; border: 1px solid var(--green-700); border-radius: 6px; background: white; color: var(--green-700); font-size: 9px; font-weight: 700; }
.dictionary-result button svg { width: 13px; }

.screen-switcher { position: absolute; z-index: 20; right: -20px; bottom: 56px; display: flex; flex-direction: column; gap: 5px; }
.screen-switcher button { width: 55px; height: 34px; background: rgba(255,255,255,.85); border: 1px solid rgba(23,106,57,.16); border-radius: 5px; color: var(--muted); font-size: 10px; backdrop-filter: blur(8px); }
.screen-switcher button.active { background: var(--ink); color: white; }
.orbit-card { position: absolute; z-index: 6; width: 122px; padding: 12px; display: grid; grid-template-columns: 30px 1fr; background: rgba(255,255,255,.88); border: 1px solid rgba(23,106,57,.16); border-radius: 7px; box-shadow: 0 14px 28px rgba(14,45,28,.1); backdrop-filter: blur(10px); }
.orbit-card svg { grid-row: span 2; align-self: center; width: 20px; color: var(--green-700); }
.orbit-card strong { font-size: 16px; }
.orbit-card span { color: var(--muted); font-size: 8px; }
.orbit-one { top: 23%; left: -6%; }
.orbit-two { right: -10%; top: 46%; }
.orbit-two .mini-bars { grid-row: span 2; align-self: center; width: 23px; height: 24px; display: flex; align-items: flex-end; gap: 2px; }
.mini-bars i { width: 4px; background: var(--green-500); }
.mini-bars i:nth-child(1) { height: 35%; }.mini-bars i:nth-child(2) { height: 70%; }.mini-bars i:nth-child(3) { height: 50%; }.mini-bars i:nth-child(4) { height: 100%; }
.scroll-cue { position: absolute; z-index: 5; left: 50%; bottom: 14px; width: 22px; height: 34px; border: 1px solid rgba(19,42,27,.3); border-radius: 14px; }
.scroll-cue span { position: absolute; left: 50%; top: 8px; width: 3px; height: 7px; border-radius: 3px; background: var(--green-700); transform: translateX(-50%); animation: scroll-cue 1.8s infinite; }
@keyframes scroll-cue { 0% { transform: translate(-50%,0); opacity: 0; } 30% { opacity: 1; } 100% { transform: translate(-50%,10px); opacity: 0; } }

.proof-strip { min-height: 116px; display: grid; grid-template-columns: repeat(4, 1fr); width: min(calc(100% - 48px), var(--container)); margin: 0 auto; border-bottom: 1px solid var(--line); }
.proof-strip div { position: relative; display: flex; flex-direction: column; justify-content: center; padding-left: 32px; }
.proof-strip div + div { border-left: 1px solid var(--line); }
.proof-strip div::before { content: ""; position: absolute; left: 15px; width: 4px; height: 4px; border-radius: 50%; background: var(--green-500); }
.proof-strip strong { font-size: 14px; }
.proof-strip span { margin-top: 5px; color: var(--muted); font-size: 10px; }

.hangul-ribbon { height: 42px; overflow: hidden; display: flex; align-items: center; background: #d75f4c; color: white; border-bottom: 1px solid rgba(19,42,27,.16); }
.hangul-ribbon > div { width: max-content; display: flex; animation: ribbon 28s linear infinite; }
.hangul-ribbon span { flex: 0 0 auto; font-family: "App Noto Sans KR", "App HarmonyOS Sans SC", sans-serif; font-size: 11px; font-weight: 700; white-space: nowrap; word-spacing: 20px; }
@keyframes ribbon { to { transform: translateX(-50%); } }

.section { width: min(calc(100% - 48px), var(--container)); margin: 0 auto; padding: 120px 0; }
.method { position: relative; }
.vertical-hangul { position: absolute; right: -54px; top: 124px; color: rgba(23,106,57,.22); font-family: "App Noto Sans KR", sans-serif; font-size: 10px; font-weight: 700; line-height: 1.8; text-align: center; writing-mode: vertical-rl; }
.section-index { margin: 0 0 18px; text-transform: uppercase; }
.section-index.light { color: #9ad7a8; }
.section-heading { display: grid; grid-template-columns: 1fr 1fr; column-gap: 70px; align-items: end; }
.section-heading .section-index { grid-column: 1 / -1; }
.section-heading h2, .features-intro h2, .wordbooks h2, .faq h2, .download h2 { margin: 0; font-size: clamp(38px, 4.6vw, 66px); line-height: 1.18; font-weight: 850; }
.section-heading > p:last-child { margin: 0 0 5px; color: var(--muted); font-size: 15px; line-height: 1.9; }

.method-flow { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 86px; }
.method-flow::before { content: ""; position: absolute; left: 9%; right: 9%; top: 49px; height: 1px; background: var(--green-200); }
.method-step { position: relative; padding: 0 11%; }
.method-step + .method-step { border-left: 1px solid var(--line); }
.step-number { color: #8da096; font-size: 10px; }
.step-icon { position: relative; z-index: 1; width: 72px; height: 72px; margin: 19px 0 30px; display: grid; place-items: center; background: var(--paper); border: 1px solid var(--green-200); border-radius: 50%; color: var(--green-700); }
.step-icon svg { width: 28px; height: 28px; }
.method-step h3 { margin: 0; font-size: 21px; }
.method-step p { margin: 13px 0 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

.wordbooks { overflow: hidden; padding: 115px 0 100px; background: var(--green-950); color: white; }
.wordbooks-inner { width: min(calc(100% - 48px), var(--container)); margin: 0 auto; display: grid; grid-template-columns: .82fr 1.18fr; gap: 70px; align-items: center; }
.wordbooks-copy > p:not(.section-index) { max-width: 470px; margin: 28px 0; color: #b8c9bd; font-size: 14px; line-height: 1.9; }
.light-link { color: white; }
.book-shelf { position: relative; min-height: 455px; display: flex; align-items: flex-end; gap: 10px; padding: 0 0 36px; perspective: 900px; }
.book { position: relative; width: 25%; height: 350px; flex-shrink: 0; padding: 24px 16px; overflow: hidden; color: white; border: 1px solid rgba(255,255,255,.25); border-radius: 3px 7px 7px 3px; box-shadow: -10px 16px 22px rgba(0,0,0,.16); transform: rotateY(-8deg); transition: transform .3s, translate .3s; }
.book:hover { transform: rotateY(0); translate: 0 -12px; }
.book::after { content: ""; position: absolute; left: 0; right: 0; top: -28%; height: 14%; background: rgba(255,255,255,.16); transform: skewY(-14deg); transition: top .5s ease; }
.book:hover::after { top: 110%; }
.book::before { content: ""; position: absolute; inset: 0 auto 0 7px; width: 1px; background: rgba(255,255,255,.24); }
.book span { font-size: 9px; opacity: .78; }
.book strong { display: block; margin-top: 38px; font-size: 19px; line-height: 1.45; }
.book small { display: block; margin-top: 12px; font-size: 10px; opacity: .8; }
.book b { position: absolute; left: 16px; bottom: 23px; font-family: "App Noto Sans KR"; font-size: 9px; font-weight: 500; opacity: .72; writing-mode: vertical-rl; }
.book-green { height: 390px; background: #2b7246; }.book-coral { height: 338px; background: var(--coral); }.book-yellow { height: 370px; background: var(--yellow); color: #302817; }.book-blue { height: 315px; background: var(--blue); }
.shelf-line { position: absolute; left: -4%; right: -4%; bottom: 30px; height: 7px; background: #8ca899; box-shadow: 0 14px 0 rgba(140,168,153,.15); }

.features { display: grid; grid-template-columns: .78fr 1.22fr; gap: 90px; }
.features-intro { position: sticky; top: 120px; align-self: start; }
.feature-list { border-top: 1px solid var(--line); }
.feature-item { display: grid; grid-template-columns: 30px 50px 1fr; gap: 22px; padding: 32px 0; border-bottom: 1px solid var(--line); }
.feature-item > span { color: #8a9b91; font-size: 10px; }
.feature-item > svg { width: 27px; height: 27px; color: var(--green-700); }
.feature-item h3 { margin: 0; font-size: 20px; }
.feature-item p { margin: 9px 0 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

.download { padding: 110px 0; overflow: hidden; background: #183e2a; color: white; }
.download-inner { width: min(calc(100% - 48px), var(--container)); margin: 0 auto; display: grid; grid-template-columns: 1.15fr .85fr; gap: 100px; align-items: end; }
.download-copy img { width: 92px; height: 92px; margin-bottom: 30px; border-radius: 20px; box-shadow: 0 15px 30px rgba(0,0,0,.2); }
.download-copy > p:last-child { max-width: 590px; margin: 28px 0 0; color: #b8c9bd; font-size: 14px; line-height: 1.9; }
.download-options { display: flex; flex-direction: column; gap: 10px; }
.store-button { width: 100%; min-height: 76px; display: grid; grid-template-columns: 34px 1fr 24px; align-items: center; gap: 15px; padding: 0 19px; background: white; color: var(--ink); border-radius: 7px; text-align: left; transition: transform .2s, background .2s; }
.store-button:hover { transform: translateX(5px); background: #eff7f1; }
.store-button > svg:first-child { width: 27px; height: 27px; color: var(--green-700); }
.store-button > svg.platform-icon { width: 27px; height: 27px; color: var(--green-700); }
.store-button span { display: flex; flex-direction: column; }
.store-button small { color: var(--muted); font-size: 9px; }
.store-button strong { margin-top: 3px; font-size: 15px; }
.store-button .arrow { width: 17px; }
.store-button.secondary { background: transparent; color: white; border: 1px solid rgba(255,255,255,.25); }
.store-button.secondary small { color: #a9baae; }
.store-button.harmony { background: #d8eddf; color: var(--ink); }
.store-button.harmony:hover { background: #c6e3cf; }

.faq { display: grid; grid-template-columns: .72fr 1.28fr; gap: 100px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; cursor: pointer; list-style: none; font-size: 16px; font-weight: 700; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary svg { flex: 0 0 auto; width: 18px; transition: transform .25s; }
.faq-list details[open] summary svg { transform: rotate(180deg); }
.faq-list details p { margin: -4px 48px 28px 0; color: var(--muted); font-size: 13px; line-height: 1.9; }

.site-footer { padding: 70px max(24px, calc((100% - var(--container)) / 2)) 28px; background: #0d2618; color: white; }
.footer-main { display: grid; grid-template-columns: 1fr 1.3fr; gap: 80px; }
.footer-brand .brand { min-width: 0; }
.footer-brand .brand img { width: 46px; height: 46px; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.footer-links div { display: flex; flex-direction: column; gap: 13px; }
.footer-links strong { margin-bottom: 6px; font-size: 12px; }
.footer-links a { color: #8fa298; font-size: 11px; }
.footer-links a:hover { color: white; }
.footer-bottom { margin-top: 54px; padding-top: 22px; display: flex; justify-content: space-between; border-top: 1px solid rgba(255,255,255,.1); color: #6f8478; font-size: 9px; }

.download-dialog { width: min(calc(100% - 32px), 430px); padding: 0; border: 0; border-radius: 8px; color: var(--ink); box-shadow: 0 28px 80px rgba(5,24,13,.3); }
.download-dialog::backdrop { background: rgba(8,29,17,.58); backdrop-filter: blur(4px); }
.dialog-head { min-height: 82px; padding: 16px 18px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.dialog-head > div { display: flex; align-items: center; gap: 12px; }
.dialog-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 7px; background: var(--green-50); color: var(--green-700); }
.dialog-icon svg { width: 20px; }
.dialog-head strong, .dialog-head small { display: block; }
.dialog-head strong { font-size: 15px; }.dialog-head small { margin-top: 3px; color: var(--muted); font-size: 9px; }
.dialog-head button { width: 40px; height: 40px; display: grid; place-items: center; background: transparent; color: var(--muted); border-radius: 50%; }
.dialog-head button:hover { background: var(--green-50); }
.dialog-content { padding: 24px; }
.dialog-content p { margin: 0 0 22px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.dialog-content .button { width: 100%; }
.dialog-cancel { width: 100%; height: 40px; margin-top: 7px; background: transparent; color: var(--muted); font-size: 11px; }
.toast { position: fixed; z-index: 300; left: 50%; bottom: 24px; min-width: 180px; max-width: calc(100% - 32px); padding: 12px 18px; background: var(--ink); color: white; border-radius: 6px; text-align: center; font-size: 11px; opacity: 0; transform: translate(-50%, 20px); pointer-events: none; transition: opacity .2s, transform .2s; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1020px) {
  .desktop-nav { gap: 20px; }
  .hero-product { right: -2%; width: 51%; }
  .phone { right: 10%; width: 270px; height: 565px; }
  .orbit-two { display: none; }
  .screen-switcher { right: -5px; }
  .wordbooks-inner, .features, .faq { gap: 50px; }
  .book { padding: 20px 12px; }.book strong { font-size: 16px; }
}

@media (max-width: 780px) {
  :root { --header-height: 64px; }
  .header-inner { width: calc(100% - 32px); }
  .brand { min-width: 0; }.brand img { width: 38px; height: 38px; }.brand-reading { display: none; }
  .desktop-nav, .header-cta { display: none; }
  .menu-button { margin-left: auto; width: 44px; height: 44px; display: grid; place-items: center; background: transparent; color: var(--ink); }
  .menu-button svg { width: 23px; height: 23px; }
  .mobile-nav { position: fixed; inset: var(--header-height) 0 auto; padding: 18px 24px 26px; display: flex; flex-direction: column; gap: 0; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 20px 30px rgba(14,45,28,.1); }
  .mobile-nav[hidden] { display: none; }
  .mobile-nav a { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
  .mobile-nav a:last-child { margin-top: 12px; padding: 14px; background: var(--ink); color: white; border: 0; border-radius: 6px; text-align: center; }

  .hero { height: calc(100svh - 98px); min-height: 570px; max-height: 720px; }
  .hero::before { right: -42%; top: 35%; width: 115vw; }
  .hero::before { right: -42%; top: 42%; width: 115vw; height: 58%; clip-path: polygon(20% 0, 100% 0, 100% 100%, 0 100%); }
  .hero::after { top: 42%; right: 3%; width: 1px; height: 58%; box-shadow: -32px 0 #6e9a7c, -64px 0 #6e9a7c, -96px 0 #6e9a7c, -128px 0 #6e9a7c, -160px 0 #6e9a7c, -192px 0 #6e9a7c, -224px 0 #6e9a7c; }
  .hero-inner { width: calc(100% - 32px); }
  .hero-copy { top: 7%; width: 100%; transform: none; }
  .hero h1 { margin-top: 8px; font-size: 66px; }
  .hero-korean { margin-top: 8px; font-size: 13px; }
  .hero-lead { max-width: 88%; margin-top: 13px; font-size: 13px; line-height: 1.7; }
  .hero-actions { margin-top: 17px; gap: 18px; }
  .button { min-height: 44px; padding: 0 17px; font-size: 12px; }
  .text-link { font-size: 12px; }
  .hero-note { display: none; }
  .korean-seal { left: auto; right: 8px; bottom: -14px; width: 37px; height: 48px; }
  .hero-product { top: auto; right: -4%; bottom: -1px; width: 78%; height: 52%; }
  .phone { right: 2%; bottom: -235px; width: 230px; height: 480px; }
  .screen-switcher { right: 4px; bottom: 22px; }
  .screen-switcher button { width: 48px; height: 30px; }
  .orbit-card { display: none; }
  .product-caption { display: none; }
  .scroll-cue { left: 22px; bottom: 12px; }
  .word-cloud span { font-size: calc(22px * var(--s)); }

  .proof-strip { width: calc(100% - 32px); min-height: 156px; grid-template-columns: 1fr 1fr; }
  .proof-strip div { padding-left: 17px; }
  .proof-strip div:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); }
  .proof-strip div:nth-child(4) { border-top: 1px solid var(--line); }
  .proof-strip div::before { display: none; }
  .proof-strip strong { font-size: 12px; }.proof-strip span { font-size: 8px; }

  .section { width: calc(100% - 32px); padding: 78px 0; }
  .vertical-hangul { display: none; }
  .section-heading { display: block; }
  .section-heading h2, .features-intro h2, .wordbooks h2, .faq h2, .download h2 { font-size: 36px; }
  .section-heading > p:last-child { margin-top: 24px; font-size: 13px; }
  .method-flow { grid-template-columns: 1fr; margin-top: 50px; }
  .method-flow::before { display: none; }
  .method-step { padding: 28px 0; display: grid; grid-template-columns: 25px 58px 1fr; column-gap: 14px; align-items: center; border-top: 1px solid var(--line); }
  .method-step + .method-step { border-left: 0; }
  .step-icon { grid-row: span 2; grid-column: 2; width: 52px; height: 52px; margin: 0; }
  .step-icon svg { width: 22px; height: 22px; }
  .method-step h3 { grid-column: 3; font-size: 17px; }.method-step p { grid-column: 3; margin-top: 6px; font-size: 11px; }

  .wordbooks { padding: 78px 0 66px; }
  .wordbooks-inner { width: calc(100% - 32px); grid-template-columns: 1fr; gap: 48px; }
  .wordbooks-copy > p:not(.section-index) { font-size: 12px; }
  .book-shelf { min-height: 300px; gap: 5px; overflow: visible; }
  .book { height: 252px; padding: 16px 9px; }.book-green { height: 280px; }.book-coral { height: 242px; }.book-yellow { height: 263px; }.book-blue { height: 225px; }
  .book strong { margin-top: 24px; font-size: 12px; }.book b { left: 9px; bottom: 17px; font-size: 7px; }.book small, .book span { font-size: 7px; }

  .features, .faq { display: block; }
  .features-intro { position: static; margin-bottom: 50px; }
  .feature-item { grid-template-columns: 24px 39px 1fr; gap: 12px; padding: 25px 0; }
  .feature-item > svg { width: 23px; height: 23px; }.feature-item h3 { font-size: 16px; }.feature-item p { font-size: 11px; }

  .download { padding: 74px 0; }
  .download-inner { width: calc(100% - 32px); grid-template-columns: 1fr; gap: 44px; }
  .download-copy img { width: 74px; height: 74px; border-radius: 17px; }
  .download-copy > p:last-child { font-size: 12px; }
  .store-button { min-height: 68px; }
  .faq-intro { margin-bottom: 48px; }
  .faq-list summary { min-height: 70px; font-size: 13px; }.faq-list details p { font-size: 11px; }

  .site-footer { padding: 56px 24px 24px; }
  .footer-main { grid-template-columns: 1fr; gap: 45px; }
  .footer-links { gap: 20px; }
  .footer-bottom { margin-top: 45px; flex-direction: column; gap: 8px; }
}

@media (max-width: 380px) {
  .hero-copy { top: 5%; }
  .eyebrow { font-size: 10px; }
  .hero h1 { font-size: 56px; }
  .hero-lead { max-width: 95%; font-size: 12px; }
  .hero-product { height: 46%; }
  .phone { right: -5%; width: 210px; height: 440px; }
  .screen-switcher { right: -2px; }
  .footer-links { grid-template-columns: 1fr 1fr; row-gap: 34px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}