:root {
  --navy: #111a29;
  --navy-2: #182338;
  --ink: #11120f;
  --paper: #f3f0e8;
  --paper-2: #e7e2d5;
  --acid: #d8ff42;
  --coral: #ff7548;
  --muted: #6c6d67;
  --line: rgba(17, 18, 15, .15);
  --white: #fff;
  --shell: min(1180px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Pretendard, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif; word-break: keep-all; }
a { color: inherit; }
img { display: block; max-width: 100%; height: auto; }
.shell { width: var(--shell); margin-inline: auto; }
.narrow { max-width: 980px; }
.skip-link { position: fixed; left: 16px; top: -100px; z-index: 100; padding: 12px 18px; background: var(--acid); color: var(--ink); font-weight: 800; }
.skip-link:focus { top: 16px; }

.topbar { position: absolute; inset: 0 0 auto; z-index: 20; color: var(--white); border-bottom: 1px solid rgba(255,255,255,.14); }
.topbar-inner { height: 76px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.brand span { font-weight: 900; font-size: 20px; letter-spacing: -.06em; }
.brand i { width: 1px; height: 20px; background: rgba(255,255,255,.35); }
.brand small { color: var(--acid); font-size: 10px; letter-spacing: .12em; }
.topbar nav { display: flex; align-items: center; gap: 26px; }
.topbar nav a { font-size: 14px; text-decoration: none; color: #dce2ec; }
.topbar nav .nav-cta { padding: 10px 15px; border: 1px solid rgba(255,255,255,.28); color: var(--white); }

.hero { position: relative; overflow: hidden; min-height: 760px; background: var(--navy); color: var(--white); }
.hero-grid { position: absolute; inset: 0; opacity: .08; background-image: linear-gradient(rgba(255,255,255,.7) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.7) 1px, transparent 1px); background-size: 64px 64px; mask-image: linear-gradient(to bottom, black, transparent 80%); }
.hero-circle { position: absolute; border-radius: 50%; }
.hero-circle-one { width: 430px; height: 430px; right: -180px; top: -150px; background: var(--acid); }
.hero-circle-two { width: 240px; height: 240px; left: -150px; bottom: -90px; border: 46px solid var(--coral); }
.hero-layout { position: relative; z-index: 2; min-height: 760px; padding: 140px 0 84px; display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 80px; }
.eyebrow, .kicker { margin: 0 0 22px; color: var(--coral); font-size: 12px; font-weight: 850; letter-spacing: .14em; }
.hero h1 { margin: 0; font-size: clamp(50px, 6vw, 82px); line-height: 1.08; letter-spacing: -.055em; font-weight: 760; }
.hero h1 em { color: var(--acid); font-style: normal; }
.hero-lede { margin: 28px 0 0; color: #c6cfdd; font-size: 19px; line-height: 1.85; }
.hero-actions { display: flex; align-items: center; gap: 24px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 56px; padding: 0 22px; border: 0; text-decoration: none; font: inherit; font-weight: 850; cursor: pointer; transition: transform .18s ease, box-shadow .18s ease; }
.button:hover { transform: translateY(-2px); }
.button-acid { background: var(--acid); color: var(--ink); box-shadow: 0 10px 30px rgba(216,255,66,.16); }
.button-acid span { font-size: 20px; }
.sample-link { color: var(--white); font-weight: 750; text-underline-offset: 6px; }
.hero-facts { display: flex; gap: 0; margin: 40px 0 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.16); max-width: 610px; }
.hero-facts li { flex: 1; padding: 18px 18px 0 0; display: grid; gap: 4px; }
.hero-facts strong { font-size: 19px; }
.hero-facts span { color: #9ea9bb; font-size: 12px; }
.honest-note { max-width: 620px; margin: 24px 0 0; color: #8f9bad; font-size: 12px; line-height: 1.7; }

.book-stage { position: relative; display: grid; place-items: center; perspective: 1100px; }
.book-stage img { position: relative; z-index: 2; width: min(360px, 82%); border-radius: 2px 12px 12px 2px; transform: rotateY(-9deg) rotateZ(1deg); transform-origin: left center; box-shadow: 22px 28px 55px rgba(0,0,0,.38), inset 10px 0 15px rgba(0,0,0,.25); }
.book-stage::before { content: ""; position: absolute; z-index: 3; width: min(360px, 82%); height: 100%; max-height: 510px; pointer-events: none; border-left: 7px solid rgba(255,255,255,.1); transform: rotateY(-9deg) rotateZ(1deg); border-radius: 3px 12px 12px 3px; }
.book-shadow { position: absolute; bottom: -28px; width: 72%; height: 70px; border-radius: 50%; background: rgba(0,0,0,.45); filter: blur(16px); }
.price-sticker { position: absolute; z-index: 5; right: -12px; bottom: 34px; width: 116px; height: 116px; border-radius: 50%; background: var(--coral); color: var(--white); display: flex; align-items: center; justify-content: center; flex-wrap: wrap; align-content: center; transform: rotate(9deg); box-shadow: 0 12px 25px rgba(0,0,0,.25); }
.price-sticker small { width: 100%; text-align: center; font-weight: 800; }
.price-sticker strong { font-size: 24px; letter-spacing: -.05em; }
.price-sticker span { font-size: 13px; margin-left: 2px; }

.proof-strip { background: var(--acid); overflow: hidden; }
.proof-track { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 18px; white-space: nowrap; font-size: 13px; font-weight: 850; }
.proof-track i { color: var(--coral); font-style: normal; }

.section { padding: 110px 0; }
.kicker { margin-bottom: 18px; }
.kicker.light { color: var(--acid); }
.problem h2, .contents h2, .truth h2, .section-title h2, .buy h2 { margin: 0; font-size: clamp(38px, 5vw, 64px); line-height: 1.16; letter-spacing: -.045em; }
mark { color: inherit; background: linear-gradient(transparent 60%, var(--acid) 60%); }
.intro { max-width: 820px; margin: 28px 0 0; color: var(--muted); font-size: 19px; line-height: 1.9; }
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 54px; }
.problem-grid article { min-height: 250px; padding: 28px; border: 1px solid var(--line); background: rgba(255,255,255,.32); }
.problem-grid span { color: var(--coral); font-size: 12px; font-weight: 850; }
.problem-grid h3 { margin: 58px 0 12px; font-size: 25px; letter-spacing: -.035em; }
.problem-grid p { margin: 0; color: var(--muted); line-height: 1.75; }

.contents { background: var(--navy); color: var(--white); }
.contents-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 90px; align-items: start; }
.contents-heading { position: sticky; top: 36px; }
.contents-heading h2 { font-size: clamp(38px, 4.4vw, 58px); }
.outline-link { display: inline-block; margin-top: 30px; color: var(--acid); font-weight: 800; text-underline-offset: 6px; }
.chapter-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.18); }
.chapter-list li { display: grid; grid-template-columns: 54px 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid rgba(255,255,255,.18); }
.chapter-list li > span { color: var(--coral); font-size: 12px; font-weight: 850; }
.chapter-list div { display: grid; gap: 8px; }
.chapter-list strong { font-size: 19px; letter-spacing: -.02em; }
.chapter-list small { color: #9da8bb; font-size: 14px; line-height: 1.55; }

.truth { background: var(--paper-2); }
.truth-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; align-items: center; }
.truth-card { padding: 46px; background: var(--paper); border: 1px solid var(--line); box-shadow: 18px 18px 0 var(--coral); }
.zero { display: block; color: var(--coral); font-size: 130px; line-height: .9; letter-spacing: -.08em; }
.truth-card h2 { margin-top: 20px; font-size: 39px; }
.truth-card p { margin: 22px 0 0; color: var(--muted); line-height: 1.85; }
.truth-copy h3 { margin: 0; font-size: 34px; letter-spacing: -.04em; }
.truth-copy > p { color: var(--muted); font-size: 18px; line-height: 1.9; }
.truth-copy ul { margin: 30px 0 0; padding: 0; list-style: none; display: grid; gap: 14px; }
.truth-copy li { display: flex; gap: 12px; font-weight: 700; }
.truth-copy li span { color: var(--coral); }

.section-title { max-width: 800px; }
.tool-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 52px; }
.tool-grid article { min-height: 260px; padding: 28px; border: 1px solid var(--line); display: flex; flex-direction: column; }
.tool-grid article:nth-child(2), .tool-grid article:nth-child(4) { background: var(--navy); color: var(--white); }
.tool-grid span { color: var(--coral); font-size: 11px; font-weight: 850; letter-spacing: .12em; }
.tool-grid h3 { margin: auto 0 12px; font-size: 24px; }
.tool-grid p { margin: 0; color: var(--muted); line-height: 1.7; }
.tool-grid article:nth-child(2) p, .tool-grid article:nth-child(4) p { color: #aeb7c7; }

.buy { background: var(--navy); color: var(--white); }
.buy-layout { display: grid; grid-template-columns: 1fr .85fr; gap: 90px; align-items: start; }
.buy h2 { font-size: clamp(40px, 5vw, 66px); }
.price { display: flex; align-items: baseline; gap: 14px; margin: 34px 0 24px; }
.price span { color: #99a4b5; }
.price strong { color: var(--acid); font-size: 38px; letter-spacing: -.04em; }
.buy-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; color: #d3d9e2; }
.buy-list li::before { content: "✓"; color: var(--coral); margin-right: 12px; }
.policy-note { margin: 28px 0 0; color: #8d98a9; font-size: 13px; line-height: 1.75; }
.order-card { background: var(--paper); color: var(--ink); padding: 34px; }
.order-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.order-head span { font-size: 25px; font-weight: 850; }
.order-head small { color: var(--muted); }
form { margin-top: 24px; display: grid; gap: 18px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
label { display: grid; gap: 8px; font-size: 13px; font-weight: 750; }
input, select { width: 100%; height: 50px; border: 1px solid rgba(17,18,15,.2); border-radius: 0; background: #fff; color: var(--ink); padding: 0 13px; font: inherit; }
input:focus, select:focus { outline: 3px solid rgba(216,255,66,.72); border-color: var(--ink); }
.consent { grid-template-columns: 18px 1fr; align-items: start; font-weight: 500; line-height: 1.55; color: var(--muted); }
.consent input { width: 17px; height: 17px; margin: 2px 0 0; }
.consent a { color: var(--ink); }
.honey { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.button-full { width: 100%; }
button:disabled { opacity: .62; cursor: wait; transform: none; }
.form-message { min-height: 0; margin: 0; font-size: 13px; line-height: 1.7; }
.form-message.error { color: #b32c1b; }
.form-message.success { padding: 14px; background: #e7f7cf; color: #27430d; }
.direct-contact { margin: 20px 0 0; text-align: center; color: var(--muted); font-size: 12px; }
.direct-contact a { color: var(--ink); }

footer { background: #0b111c; color: #a0aaba; padding: 48px 0; }
.footer-inner { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 18px; }
.footer-inner > div:first-child { display: grid; gap: 8px; }
.footer-inner strong { color: var(--white); }
.footer-inner span, .footer-inner small { font-size: 12px; }
.footer-links { display: flex; gap: 20px; font-size: 12px; }
.footer-inner small { grid-column: 1 / -1; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.1); }

@media (max-width: 920px) {
  .topbar nav > a:not(.nav-cta) { display: none; }
  .hero-layout { grid-template-columns: 1fr; gap: 64px; padding-top: 130px; }
  .book-stage { order: -1; padding-top: 30px; }
  .book-stage img { width: 280px; }
  .book-stage::before { width: 280px; max-height: 397px; }
  .hero-copy { text-align: center; }
  .hero-actions, .hero-facts { justify-content: center; margin-inline: auto; }
  .honest-note { margin-inline: auto; }
  .contents-layout, .truth-layout, .buy-layout { grid-template-columns: 1fr; gap: 52px; }
  .contents-heading { position: static; }
  .tool-grid { grid-template-columns: 1fr 1fr; }
  .proof-track { justify-content: flex-start; overflow-x: auto; }
}

@media (max-width: 640px) {
  :root { --shell: min(100% - 28px, 1180px); }
  .topbar-inner { height: 66px; }
  .topbar nav { gap: 10px; }
  .topbar nav .nav-cta { padding: 9px 11px; font-size: 12px; }
  .hero { min-height: auto; }
  .hero-layout { min-height: auto; padding: 94px 0 66px; gap: 45px; }
  .book-stage img { width: 220px; }
  .book-stage::before { width: 220px; max-height: 313px; }
  .price-sticker { width: 92px; height: 92px; right: 0; bottom: 14px; }
  .price-sticker strong { font-size: 19px; }
  .hero h1 { font-size: 43px; }
  .hero-lede { font-size: 16px; line-height: 1.75; }
  .desktop-only { display: none; }
  .hero-actions { flex-direction: column; gap: 20px; }
  .hero-facts { width: 100%; }
  .hero-facts li { padding-right: 7px; }
  .proof-track { min-height: 56px; font-size: 12px; }
  .section { padding: 74px 0; }
  .problem h2, .contents h2, .truth h2, .section-title h2, .buy h2 { font-size: 36px; }
  .intro { font-size: 16px; }
  .problem-grid, .tool-grid { grid-template-columns: 1fr; }
  .problem-grid article { min-height: 210px; }
  .contents-layout { gap: 38px; }
  .chapter-list li { grid-template-columns: 40px 1fr; }
  .truth-card { padding: 28px; box-shadow: 10px 10px 0 var(--coral); }
  .zero { font-size: 100px; }
  .truth-card h2 { font-size: 32px; }
  .field-row { grid-template-columns: 1fr; }
  .order-card { padding: 24px 18px; }
  .order-head { display: grid; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}