/* FitBoost 사이트 스타일.
   앱과 같은 토큰을 쓴다. 근사 블랙 위에 라임 하나로 강조하고, 깊이는
   그림자가 아니라 표면 밝기와 얇은 보더로 만든다.
   움직임은 스크롤에 물려 있다. scroll-driven animation을 쓰고,
   지원하지 않는 브라우저에서는 IntersectionObserver가 같은 자리를 메운다. */

:root {
  --ink-base: #08080A;
  --ink-surface: #0E0E12;
  --ink-card: #17171C;
  --ink-raised: #202028;
  --line: #33333D;
  --line-strong: #45454F;

  --text-hi: #F5F5F7;
  --text-mid: #A8A8B3;
  --text-lo: #6E6E7A;

  --accent: #C5F04A;
  --accent-dim: #8FAF37;
  --on-accent: #0B0B0F;

  --max: 1120px;
  --pad: clamp(20px, 5vw, 48px);
  --radius: 22px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Pretendard",
    "Apple SD Gothic Neo", "Noto Sans KR", "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--ink-base);
  color: var(--text-hi);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* ── 상단 바 ─────────────────────────────────────────────── */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  background: rgba(8, 8, 10, 0.55);
  border-bottom: 1px solid transparent;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease);
}
.nav.is-stuck {
  background: rgba(8, 8, 10, 0.82);
  border-bottom-color: var(--line);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 56px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--text-hi);
}
.brand:hover { text-decoration: none; }
.brand__mark { width: 26px; height: 26px; border-radius: 7px; }
.brand__boost { color: var(--accent); }

.nav__links {
  display: flex;
  gap: 22px;
  margin-left: auto;
  font-size: 14px;
}
.nav__links a { color: var(--text-mid); }
.nav__links a:hover { color: var(--text-hi); text-decoration: none; }

/* ── 히어로 ──────────────────────────────────────────────── */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  margin-top: -56px;
  padding: 120px 0 96px;
  display: grid;
  place-items: center;
  text-align: center;
  overflow: clip;
}

/* 라임 글로우 두 겹. 아주 천천히 흐른다. */
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(30px);
}
.hero::before {
  width: 118vw;
  height: 78vh;
  top: -26%;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(197, 240, 74, 0.17), transparent 62%);
  animation: drift 22s ease-in-out infinite alternate;
}
.hero::after {
  width: 62vw;
  height: 46vh;
  bottom: -18%;
  right: -12%;
  background: radial-gradient(ellipse at center, rgba(124, 92, 255, 0.14), transparent 66%);
  animation: drift 28s ease-in-out infinite alternate-reverse;
}
@keyframes drift {
  from { transform: translate(-50%, 0) scale(1); }
  to   { transform: translate(-50%, 4vh) scale(1.12); }
}

.hero__inner { position: relative; z-index: 1; }

.hero__eyebrow {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: rgba(197, 240, 74, 0.08);
}

h1 {
  margin: 26px 0 0;
  font-size: clamp(44px, 10.5vw, 112px);
  line-height: 1.02;
  letter-spacing: -0.045em;
  font-weight: 800;
}

/* 히어로 헤드라인은 단어 단위로 올라온다. */
.w {
  display: inline-block;
  will-change: transform, opacity;
}
.hero h1 .w {
  opacity: 0;
  transform: translateY(0.5em);
  animation: wordUp 0.95s var(--ease) forwards;
  animation-delay: calc(var(--i, 0) * 78ms + 140ms);
}
@keyframes wordUp {
  to { opacity: 1; transform: none; }
}

.hero__lede {
  margin: 24px auto 0;
  max-width: 32ch;
  font-size: clamp(17px, 2.2vw, 22px);
  color: var(--text-mid);
  opacity: 0;
  animation: wordUp 0.9s var(--ease) 0.62s forwards;
}
.hero .badges,
.hero .badges__note {
  opacity: 0;
  animation: wordUp 0.9s var(--ease) 0.78s forwards;
}

.hero__cue {
  position: absolute;
  left: 50%;
  bottom: 30px;
  translate: -50% 0;
  width: 22px;
  height: 36px;
  border: 2px solid var(--line-strong);
  border-radius: 12px;
  opacity: 0;
  animation: wordUp 0.9s var(--ease) 1s forwards;
}
.hero__cue::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 7px;
  translate: -50% 0;
  width: 3px;
  height: 7px;
  border-radius: 2px;
  background: var(--accent);
  animation: cue 1.9s var(--ease) infinite;
}
@keyframes cue {
  0%   { opacity: 0; transform: translateY(0); }
  30%  { opacity: 1; }
  100% { opacity: 0; transform: translateY(12px); }
}

/* ── 스토어 배지 ─────────────────────────────────────────── */

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-top: 36px;
}
.badge { display: inline-block; transition: transform 0.2s var(--ease); }
.badge:hover { transform: translateY(-3px); text-decoration: none; }
.badge img { height: 54px; width: auto; }
.badge--soon { opacity: 0.55; pointer-events: none; }

.badges__note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-lo);
}

/* ── 섹션 ───────────────────────────────────────────────── */

section { padding: clamp(72px, 11vw, 132px) 0; position: relative; }

.section__eyebrow {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-dim);
}
h2 {
  margin: 12px 0 0;
  font-size: clamp(32px, 6vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.035em;
  font-weight: 800;
}
.section__lede {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-mid);
}

/* ── 숫자 띠 ─────────────────────────────────────────────── */

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding: clamp(40px, 6vw, 64px) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
}
.stat__num {
  display: block;
  font-size: clamp(38px, 7vw, 76px);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.stat__label {
  display: block;
  margin-top: 10px;
  font-size: clamp(13px, 1.6vw, 15px);
  color: var(--text-mid);
}

/* ── 스크롤 고정 쇼케이스 ────────────────────────────────── */

.showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }

.showcase__sticky {
  position: sticky;
  top: 92px;
  align-self: start;
  display: flex;
  justify-content: center;
  height: min(76vh, 680px);
}

.phone {
  position: relative;
  height: 100%;
  aspect-ratio: 1260 / 2736;
  border-radius: 42px;
  padding: 8px;
  background: linear-gradient(160deg, #2b2b33, #101014);
  border: 1px solid var(--line-strong);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
  transform-origin: center;
}
/* 화면에 들어올 때 한 번 자란다. */
.js .phone {
  opacity: 0;
  transform: scale(0.86) translateY(28px);
  transition: opacity 0.9s var(--ease), transform 1s var(--ease);
}
.js .phone.is-in { opacity: 1; transform: none; }

.phone__screen {
  position: relative;
  height: 100%;
  border-radius: 34px;
  overflow: hidden;
  background: var(--ink-base);
}
.phone__screen img {
  position: absolute;
  inset: 0;
  height: 100%;
  width: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.04);
  transition: opacity 0.55s var(--ease), transform 0.75s var(--ease);
}
.phone__screen img.is-active { opacity: 1; transform: none; }

.showcase__steps { display: flex; flex-direction: column; }
.step {
  min-height: min(76vh, 680px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px 0;
  transition: opacity 0.5s var(--ease);
}
/* 읽고 있는 단계만 또렷하게. */
.js .step { opacity: 0.32; }
.js .step.is-current { opacity: 1; }

.step h3 {
  margin: 10px 0 0;
  font-size: clamp(26px, 3.8vw, 40px);
  letter-spacing: -0.03em;
  line-height: 1.16;
  font-weight: 800;
}
.step p { margin: 14px 0 0; color: var(--text-mid); max-width: 42ch; }
.step__num {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--accent);
}

/* ── 큰 문장 ─────────────────────────────────────────────── */

.statement {
  min-height: 92vh;
  display: grid;
  place-items: center;
  text-align: center;
}
.statement h2 {
  font-size: clamp(38px, 9vw, 104px);
  letter-spacing: -0.05em;
  line-height: 1.02;
  max-width: 16ch;
}
.statement em {
  font-style: normal;
  color: var(--accent);
}
.statement .section__lede { margin-inline: auto; text-align: center; }

/* ── 기능 갤러리 (가로 스냅) ─────────────────────────────── */

.gallery {
  display: flex;
  gap: 18px;
  margin-top: 48px;
  margin-inline: calc(50% - 50vw);
  width: 100vw;
  padding-block: 6px 30px;
  padding-inline: max(var(--pad), calc((100vw - var(--max)) / 2));
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  overscroll-behavior-x: contain;
}
.gallery::-webkit-scrollbar { display: none; }

.card {
  flex: 0 0 clamp(258px, 74vw, 328px);
  scroll-snap-align: center;
  padding: 28px;
  border-radius: var(--radius);
  background: var(--ink-card);
  border: 1px solid var(--line);
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease);
}
.card:hover { transform: translateY(-6px); border-color: var(--line-strong); }
.card h3 {
  margin: 0 0 8px;
  font-size: 19px;
  letter-spacing: -0.015em;
  font-weight: 800;
}
.card p { margin: 0; color: var(--text-mid); font-size: 15px; }
.card__icon {
  width: 42px; height: 42px;
  margin-bottom: 18px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: rgba(197, 240, 74, 0.12);
  border: 1px solid rgba(197, 240, 74, 0.28);
}
.card__icon svg { width: 22px; height: 22px; stroke: var(--accent); }

.gallery__hint {
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-lo);
}

/* ── 가격 ───────────────────────────────────────────────── */

.tiers {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
}
.tier {
  padding: 34px;
  border-radius: var(--radius);
  background: var(--ink-card);
  border: 1px solid var(--line);
}
.tier--free {
  background: linear-gradient(180deg, rgba(197, 240, 74, 0.1), var(--ink-card));
  border-color: rgba(197, 240, 74, 0.4);
}
.tier__name {
  display: inline-block;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  background: var(--accent);
  color: var(--on-accent);
}
.tier--pro .tier__name { background: var(--ink-raised); color: var(--text-hi); }
.tier h3 { margin: 16px 0 6px; font-size: 25px; letter-spacing: -0.02em; }
.tier > p { margin: 0 0 18px; color: var(--text-mid); font-size: 15px; }
.tier ul { margin: 0; padding: 0; list-style: none; }
.tier li {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 7px 0; font-size: 15px; color: var(--text-hi);
}
.tier li svg { flex: none; width: 17px; height: 17px; margin-top: 4px; stroke: var(--accent); }

/* ── 언어 줄 ────────────────────────────────────────────── */

.langs {
  margin-top: 30px;
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: center;
}
.lang {
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--ink-card);
  font-size: 15px;
  font-weight: 700;
}

/* ── 문서 페이지 ─────────────────────────────────────────── */

.doc { padding: clamp(72px, 8vw, 112px) 0 96px; }
.doc h1 { font-size: clamp(32px, 5.5vw, 52px); }
.doc__meta { margin-top: 12px; color: var(--text-lo); font-size: 14px; }
.doc h2 {
  margin-top: 52px;
  font-size: clamp(21px, 2.8vw, 27px);
  padding-top: 26px;
  border-top: 1px solid var(--line);
}
.doc h3 { margin-top: 30px; font-size: 18px; letter-spacing: -0.01em; }
.doc p, .doc li { color: var(--text-mid); font-size: 16px; }
.doc ul { padding-left: 20px; }
.doc li { margin: 7px 0; }
.doc strong { color: var(--text-hi); }
.doc table {
  width: 100%; margin-top: 18px;
  border-collapse: collapse; font-size: 15px;
}
.doc th, .doc td {
  padding: 11px 14px; text-align: left;
  border-bottom: 1px solid var(--line);
}
.doc th { color: var(--text-hi); font-weight: 700; }
.doc td { color: var(--text-mid); }
.doc__scroll { overflow-x: auto; }

/* ── 푸터 ───────────────────────────────────────────────── */

footer {
  padding: 52px 0 64px;
  border-top: 1px solid var(--line);
  color: var(--text-lo);
  font-size: 14px;
}
.footer__row {
  display: flex; flex-wrap: wrap; gap: 22px;
  align-items: center; justify-content: space-between;
}
.footer__links { display: flex; flex-wrap: wrap; gap: 20px; }
.footer__links a { color: var(--text-mid); }

/* ── 스크롤 등장 ─────────────────────────────────────────── */
/* JS가 살아 있을 때만 숨긴다. 스크립트가 실패해도 본문은 보인다. */

.js .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  transition-delay: calc(var(--i, 0) * 65ms);
}
.js .reveal.is-in { opacity: 1; transform: none; }

/* 스크롤 타임라인을 쓸 수 있으면 스크롤 위치에 그대로 물린다. */
@supports (animation-timeline: view()) {
  .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
    animation: rise linear both;
    animation-timeline: view();
    animation-range: entry 4% cover 30%;
  }
  @keyframes rise {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: none; }
  }

  /* 히어로는 스크롤하는 만큼 뒤로 물러난다. */
  .hero__inner {
    animation: heroOut linear both;
    animation-timeline: scroll(root);
    animation-range: 0 88vh;
  }
  @keyframes heroOut {
    to { opacity: 0; transform: translateY(-52px) scale(0.93); }
  }

  .statement h2 {
    animation: swell linear both;
    animation-timeline: view();
    animation-range: entry 10% cover 48%;
  }
  @keyframes swell {
    from { opacity: 0; transform: scale(0.9); letter-spacing: -0.07em; }
    to   { opacity: 1; transform: none; }
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; animation: none; }
  .js .phone { opacity: 1; transform: none; transition: none; }
  .js .step { opacity: 1; }
  .hero h1 .w, .hero__lede, .hero .badges, .hero .badges__note, .hero__cue {
    opacity: 1; animation: none;
  }
  .hero::before, .hero::after { animation: none; }
  .hero__inner { animation: none; }
  .statement h2 { animation: none; }
  .phone__screen img { transition: none; }
  .card:hover, .badge:hover { transform: none; }
}

@media (max-width: 860px) {
  .hero { padding: 104px 0 84px; }
  .showcase { grid-template-columns: 1fr; gap: 0; }
  .showcase__sticky { height: min(56vh, 500px); top: 76px; margin-bottom: 10px; }
  .step { min-height: auto; padding: 36px 0; }
  .js .step { opacity: 1; }
  .statement { min-height: auto; }
  .nav__links { gap: 16px; font-size: 13px; }
}