* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: #f7f3eb; color: #0b1f3a; font-family: 'DM Sans', Arial, sans-serif; font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
h1, h2, h3, p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
button, summary { cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; }
img { display: block; max-width: 100%; }
[hidden] { display: none !important; }
button:focus-visible, a:focus-visible, summary:focus-visible { outline: 2px solid #167b78; outline-offset: 5px; }
.skip-link { position: fixed; top: -80px; left: 16px; z-index: 20; background: #0b1f3a; color: #f7f3eb; padding: 12px 18px; border-radius: 5px; }
.skip-link:focus { top: 12px; }
h1, h2 { font-family: 'Playfair Display', Georgia, serif; font-weight: 700; letter-spacing: -1.6px; }
h1 { font-size: clamp(38px, 4.6vw, 60px); line-height: 1.08; }
h2 { font-size: clamp(36px, 4.2vw, 50px); line-height: 1.1; }
h1 span, h2 span { color: #167b78; }
h3 { font-size: 18px; line-height: 1.3; font-weight: 600; letter-spacing: -.35px; }
.site-header { background: #f7f3eb; }
.header-inner { width: min(100% - 48px, 1040px); height: 72px; margin: auto; display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.wordmark { display: flex; align-items: center; gap: 9px; font-family: 'Playfair Display', Georgia, serif; font-size: 21px; font-weight: 600; line-height: 1; letter-spacing: -.5px; }
.wordmark img { width: 34px; height: 34px; object-fit: cover; border-radius: 4px; }
.wordmark-small { display: block; font-family: 'DM Sans', Arial, sans-serif; font-size: 8px; font-weight: 400; letter-spacing: 2px; padding-top: 5px; }
.site-header nav, .footer-inner > div { display: flex; gap: 24px; align-items: center; }
.quiet-link { border: 0; padding: 0; background: transparent; color: #51627a; font-size: 12px; transition: color .18s ease; }
.quiet-link:hover { color: #167b78; }
.header-content-link { font-size: 12px; color: #167b78; font-weight: 600; }
.header-content-link span { margin-left: 8px; }
.hero { overflow: hidden; padding: 30px 22px 0; background: #f7f3eb; }
.hero-inner { width: min(100%, 900px); margin: auto; display: flex; flex-direction: column; align-items: center; text-align: center; }
.hero-subtitle { max-width: 560px; margin-top: 20px; font-size: 16px; line-height: 1.7; color: #51627a; }
.product-mockup { width: min(100%, 540px); height: auto; margin: -8px auto -22px; object-fit: contain; background: transparent; }
.hero-purchase { width: min(100%, 350px); }
.purchase-button { display: flex; align-items: center; justify-content: center; gap: 28px; min-height: 56px; width: 100%; max-width: 350px; padding: 15px 24px; border: 1px solid #167b78; border-radius: 6px; background: #167b78; box-shadow: 0 8px 20px rgba(22, 123, 120, .1); color: #ffffff; font-weight: 700; font-size: 15px; line-height: 1.25; transition: transform .18s ease, background-color .18s ease; }
.purchase-button:hover { transform: translateY(-2px); background: #126b69; }
.button-arrow { font-size: 22px; line-height: 1; font-weight: 400; }
.purchase-note { color: #51627a; margin-top: 11px; font-size: 11px; }
.purchase-note span { margin: 0 6px; }
.hero-details { width: min(100%, 860px); margin: 38px auto 0; padding: 24px 0; display: flex; justify-content: center; border-top: 1px solid #dfd9cd; }
.hero-details > span { flex: 1; text-align: center; padding: 0 20px; border-right: 1px solid #dfd9cd; }
.hero-details > span:last-child { border: 0; }
.hero-details strong { display: block; color: #0b1f3a; font-size: 17px; font-weight: 600; }
.hero-details small { display: block; font-size: 12px; color: #51627a; margin-top: 4px; }
.section { padding: 80px 24px; }
.narrow-container { width: min(100%, 940px); margin: auto; }
.section-label { font-size: 10px; letter-spacing: 1.7px; font-weight: 700; color: #167b78; text-transform: uppercase; line-height: 1.5; }
.section-label::before { content: ''; display: inline-block; width: 24px; height: 1px; background: #b39b62; margin: 0 10px 3px 0; }
.section > .narrow-container > .section-label, .section > .narrow-container > h2 { text-align: center; }
.section > .narrow-container > h2 { margin-top: 16px; }
.section-intro { max-width: 540px; text-align: center; color: #51627a; margin: 22px auto 36px; font-size: 16px; line-height: 1.7; }
.problem-section { background: #fffdf8; border-top: 1px solid #e5dfd3; }
.problem-list { display: flex; gap: 18px; }
.problem-item { flex: 1; padding: 25px 23px 28px; border: 1px solid #e3ddcf; border-radius: 8px; background: #f7f3eb; }
.line-icon { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 50%; background: #e6efeb; color: #167b78; font-size: 12px; font-weight: 600; margin-bottom: 20px; }
.problem-item p { color: #51627a; font-size: 15px; line-height: 1.65; margin-top: 12px; }
.problem-item p + p { margin-top: 14px; }
.problem-section h2 { max-width: 850px; margin-left: auto; margin-right: auto; }
.context-note { max-width: 620px; text-align: center; margin: 32px auto 0; padding: 20px 24px; background: #e6efeb; border-radius: 6px; color: #167b78; font-size: 17px; line-height: 1.6; }
.context-note br { display: none; }
.context-note strong { color: #0b1f3a; margin-right: 5px; }
.contents-section { background: #f7f3eb; }
.contents-heading { display: flex; justify-content: space-between; align-items: center; gap: 44px; margin-bottom: 32px; }
.contents-heading > div { flex: 1; }
.contents-heading h2 { margin-top: 16px; }
.contents-heading .section-intro { text-align: left; margin: 22px 0 0; max-width: 430px; }
.page-graphic { display: block; height: auto; background: transparent; border: 0; border-radius: 0; box-shadow: none; }
.skill-graphic { width: 240px; flex: 0 0 240px; }
.contents-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.chapter { display: flex; gap: 16px; padding: 26px; border-radius: 8px; background: #fffdf8; border: 1px solid #e3ddcf; min-width: 0; }
.chapter-number { font-family: 'Playfair Display', Georgia, serif; color: #9caeaa; font-size: 24px; flex-shrink: 0; line-height: 1.2; }
.chapter h3 { font-size: 21px; }
.chapter p { font-size: 15px; color: #51627a; line-height: 1.65; margin-top: 10px; }
.chapter-tag { display: inline-block; font-size: 10px; letter-spacing: .3px; font-weight: 600; color: #167b78; margin-top: 19px; padding: 4px 9px; background: #e6efeb; border-radius: 3px; }
.chapter-reading { background: #0b1f3a; border-color: #0b1f3a; color: #f7f3eb; }
.chapter-reading .chapter-number { color: #91bdb2; }
.chapter-reading p { color: #d1dae3; }
.chapter-reading .chapter-tag { background: #224653; color: #b7d7cf; }
.chapter-writing { grid-column: 1 / -1; background: #e6efeb; border-color: #c9d9d1; }
.writing-body { display: flex; align-items: center; gap: 35px; min-width: 0; width: 100%; }
.writing-copy { flex: 1; min-width: 0; }
.writing-graphic { width: 220px; flex: 0 0 220px; }
.chapter-writing .chapter-tag { background: #fffdf8; }
.chapter-speaking { grid-column: 1 / -1; }
.chapter-speaking > div { max-width: 660px; }
.chapter-routine, .chapter-tracking { background: #efe9de; border-color: #e1d9ca; }
.chapter-routine h3, .chapter-tracking h3 { font-size: 17px; }
.contents-footnote { max-width: 720px; margin: 22px auto 0; color: #51627a; font-size: 12px; line-height: 1.7; text-align: center; }
.why-section { background: #fffdf8; }
.why-section h2 { font-size: clamp(32px, 3.6vw, 44px); }
.self-study-layout { display: flex; align-items: center; gap: 48px; margin-top: 42px; }
.self-study-visual { flex: 1.2; min-width: 0; }
.study-graphic { width: 100%; max-width: 530px; margin: auto; }
.visual-caption { font-size: 12px; text-align: center; color: #167b78; margin-top: 16px; }
.benefit-list { flex: 1; min-width: 0; }
.benefit-list article { display: flex; gap: 13px; padding: 19px 0; border-bottom: 1px solid #e3ddcf; }
.benefit-list article:last-child { border: 0; }
.benefit-check { color: #167b78; background: #e6efeb; border-radius: 50%; width: 23px; height: 23px; flex: 0 0 23px; display: flex; align-items: center; justify-content: center; font-size: 12px; margin-top: 1px; }
.benefit-list h3 { font-size: 17px; }
.benefit-list p { color: #51627a; font-size: 15px; line-height: 1.65; margin-top: 7px; }
.creator-card { margin: 44px auto 0; padding: 34px; border-radius: 8px; background: #0b1f3a; color: #f7f3eb; display: flex; align-items: center; gap: 40px; }
.creator-heading { display: flex; gap: 15px; align-items: center; flex: 0 0 240px; }
.creator-monogram { width: 50px; height: 50px; background: #244c57; color: #f7f3eb; display: flex; align-items: center; justify-content: center; font-family: 'Playfair Display', Georgia, serif; font-size: 30px; line-height: 1; border-radius: 50%; flex-shrink: 0; }
.creator-heading h3 { font-family: 'Playfair Display', Georgia, serif; font-size: 30px; margin-top: 6px; font-weight: 600; }
.creator-heading .section-label { font-size: 8px; color: #a0c9bf; letter-spacing: 1.4px; }
.creator-heading .section-label::before { display: none; }
.creator-credential { display: block; color: #a0c9bf; font-size: 11px; margin-top: 5px; }
.creator-story > p { color: #cdd7e0; font-size: 15px; line-height: 1.7; }
.creator-story > p + p { margin-top: 12px; }
.creator-story strong { color: #f7f3eb; font-weight: 500; }
.creator-link { display: inline-flex; gap: 20px; align-items: center; color: #a0c9bf; font-size: 12px; margin-top: 17px; border-bottom: 1px solid #436771; padding-bottom: 3px; }
.offer-section { background: #e6efeb; padding-top: 68px; padding-bottom: 68px; }
.offer-panel { width: min(100%, 650px); margin: auto; text-align: center; }
.offer-panel h2 { margin-top: 16px; }
.offer-graphic { width: min(100%, 460px); margin: 27px auto 18px; }
.offer-description { color: #51627a; font-size: 16px; line-height: 1.7; max-width: 440px; margin: 0 auto 20px; }
.offer-inclusions { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: 0 auto 26px; }
.offer-inclusions span { padding: 5px 10px; border: 1px solid #bfcfc7; border-radius: 4px; font-size: 10px; color: #31594f; }
.offer-panel .purchase-button { margin: auto; }
.offer-price { font-size: 46px; line-height: 1.2; font-weight: 600; color: #0b1f3a; letter-spacing: -1.5px; margin: 0 0 22px; }
.offer-status { color: #51627a; font-size: 11px; margin-top: 14px; }
.faq-section { background: #f7f3eb; }
.faq-section .narrow-container { max-width: 720px; }
.faq-list { margin-top: 32px; display: flex; flex-direction: column; gap: 10px; }
.faq-list details { background: #fffdf8; border: 1px solid #e3ddcf; border-radius: 6px; }
.faq-list summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 20px 22px; font-size: 15px; font-weight: 600; color: #0b1f3a; line-height: 1.5; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-symbol { width: 13px; height: 13px; position: relative; flex-shrink: 0; }
.faq-symbol::before, .faq-symbol::after { content: ''; position: absolute; background: #167b78; }
.faq-symbol::before { top: 6px; left: 0; width: 13px; height: 1px; }
.faq-symbol::after { top: 0; left: 6px; width: 1px; height: 13px; transition: transform .15s ease; }
details[open] .faq-symbol::after { transform: rotate(90deg); }
.faq-list details > p { font-size: 15px; line-height: 1.7; color: #51627a; padding: 0 22px 22px; }
.site-footer { padding: 28px 24px; background: #f7f3eb; border-top: 1px solid #e3ddcf; }
.footer-inner { width: min(100%, 940px); margin: auto; display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.footer-inner p, .footer-inner .quiet-link { color: #51627a; font-size: 11px; }
.info-dialog { width: min(calc(100% - 36px), 470px); padding: 27px; border: 1px solid #c5d6cf; border-radius: 8px; color: #0b1f3a; background: #f7f3eb; box-shadow: 0 25px 90px rgba(11, 31, 58, .2); }
.info-dialog::backdrop { background: rgba(11, 31, 58, .65); backdrop-filter: blur(5px); }
.dialog-header { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 17px; }
.close-dialog { font-size: 28px; color: #51627a; background: transparent; border: 0; width: 34px; height: 34px; line-height: 1; }
.info-dialog h2 { font-size: 29px; line-height: 1.2; letter-spacing: -.6px; }
.info-dialog > p { color: #51627a; font-size: 15px; margin-top: 18px; line-height: 1.7; }
.dialog-action { display: inline-block; color: #167b78; margin-top: 21px; font-size: 13px; border-bottom: 1px solid #9ebfba; }
@media (max-width: 800px) {
  .problem-list { gap: 12px; }
  .problem-item { padding: 22px 17px; }
  .contents-heading { gap: 24px; }
  .skill-graphic { width: 200px; flex-basis: 200px; }
  .self-study-layout { flex-direction: column; gap: 20px; }
  .self-study-visual { width: min(100%, 530px); }
  .benefit-list { width: 100%; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 28px; }
  .creator-card { gap: 25px; }
  .creator-heading { flex-basis: 200px; }
}
@media (max-width: 600px) {
  .header-inner { width: calc(100% - 36px); height: 62px; }
  .wordmark { font-size: 19px; gap: 6px; }
  .wordmark img { width: 28px; height: 28px; }
  .wordmark-small { font-size: 7px; letter-spacing: 1.6px; }
  .site-header nav { gap: 12px; }
  .site-header nav .quiet-link { display: none; }
  .header-content-link { font-size: 10px; }
  .hero { padding: 25px 20px 0; }
  h1 { font-size: clamp(30px, 9vw, 38px); letter-spacing: -1.1px; line-height: 1.12; }
  h2 { font-size: clamp(31px, 8.7vw, 36px); letter-spacing: -.9px; line-height: 1.12; }
  .hero-subtitle { font-size: 15px; line-height: 1.65; margin-top: 18px; max-width: 350px; }
  .product-mockup { width: calc(100% + 12px); max-width: none; margin: 0 -6px -5px; }
  .hero-purchase { width: 100%; max-width: 340px; }
  .purchase-button { min-height: 55px; font-size: 15px; }
  .purchase-note { font-size: 10px; }
  .hero-details { margin-top: 30px; padding: 20px 0; }
  .hero-details > span { padding: 0 8px; }
  .hero-details strong { font-size: 13px; }
  .hero-details small { font-size: 9px; line-height: 1.5; margin-top: 5px; }
  .section { padding: 54px 20px; }
  .section-label { font-size: 9px; letter-spacing: 1.5px; }
  .section > .narrow-container > h2 { margin-top: 14px; }
  .section-intro { font-size: 15px; margin-top: 20px; margin-bottom: 27px; line-height: 1.65; }
  .problem-list { flex-direction: column; gap: 11px; }
  .problem-item { display: flex; gap: 15px; padding: 20px; }
  .line-icon { flex: 0 0 28px; height: 28px; margin: 1px 0 0; font-size: 11px; }
  .problem-item h3 { font-size: 17px; }
  .problem-item p { font-size: 15px; line-height: 1.6; margin-top: 8px; }
  .context-note { margin-top: 24px; padding: 18px 14px; font-size: 16px; }
  .context-note br { display: block; }
  .contents-heading { flex-direction: column; text-align: center; gap: 21px; margin-bottom: 24px; }
  .contents-heading h2 { margin-top: 14px; }
  .contents-heading .section-intro { text-align: center; margin: 18px auto 0; }
  .skill-graphic { width: 195px; flex: none; }
  .contents-list { grid-template-columns: minmax(0, 1fr); gap: 11px; }
  .chapter { padding: 22px 20px; gap: 14px; }
  .chapter-number { font-size: 22px; }
  .chapter h3 { font-size: 20px; }
  .chapter p { font-size: 15px; line-height: 1.6; margin-top: 9px; }
  .chapter-tag { margin-top: 14px; font-size: 10px; }
  .chapter-writing, .chapter-speaking { grid-column: auto; }
  .writing-body { flex-direction: column; align-items: stretch; gap: 17px; }
  .writing-graphic { flex: none; width: min(100%, 230px); align-self: center; }
  .chapter-routine h3, .chapter-tracking h3 { font-size: 17px; }
  .contents-footnote { font-size: 11px; text-align: left; padding: 0 6px; margin-top: 20px; }
  .why-section h2 { font-size: clamp(29px, 7.8vw, 34px); }
  .self-study-layout { margin-top: 28px; gap: 18px; }
  .self-study-visual { width: calc(100% + 8px); max-width: none; }
  .visual-caption { font-size: 11px; margin-top: 12px; }
  .benefit-list { display: block; }
  .benefit-list article { padding: 18px 0; gap: 12px; }
  .benefit-list h3 { font-size: 17px; }
  .benefit-list p { font-size: 15px; line-height: 1.6; margin-top: 7px; }
  .creator-card { display: block; padding: 25px 23px; margin-top: 30px; }
  .creator-heading { margin-bottom: 20px; }
  .creator-heading h3 { font-size: 28px; }
  .creator-story > p { font-size: 15px; line-height: 1.7; }
  .offer-section { padding-top: 52px; padding-bottom: 52px; }
  .offer-graphic { width: calc(100% + 6px); max-width: none; margin: 24px -3px 18px; }
  .offer-description { max-width: 330px; font-size: 15px; line-height: 1.65; }
  .offer-inclusions { gap: 6px; margin-bottom: 25px; }
  .offer-inclusions span { font-size: 9px; padding: 5px 8px; }
  .offer-status { font-size: 10px; }
  .faq-list { margin-top: 28px; gap: 9px; }
  .faq-list summary { font-size: 14px; padding: 19px 17px; gap: 12px; }
  .faq-list details > p { font-size: 15px; line-height: 1.65; padding: 0 17px 20px; }
  .footer-inner { flex-direction: column; gap: 14px; }
  .footer-inner > div { gap: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}