:root {
  --ink: #171922;
  --muted: #747784;
  --paper: #f7f7f4;
  --line: #e5e5e0;
  --blue: #4c70f5;
  --blue-dark: #3859dc;
  --mint: #b9f1c7;
  --navy: #11131d;
  --radius-lg: 28px;
  --radius-md: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Noto Sans KR", sans-serif; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
.site-shell { overflow: hidden; }
.topbar { width: min(1160px, calc(100% - 56px)); height: 84px; margin: 0 auto; display: flex; align-items: center; gap: 42px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -.06em; font-size: 18px; white-space: nowrap; }
.brand-mark { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 10px; background: var(--blue); color: #fff; font-family: "Outfit", sans-serif; font-size: 17px; letter-spacing: 0; }
.nav-links { display: flex; align-items: center; gap: 30px; margin-left: auto; color: #757783; font-size: 13px; font-weight: 600; }
.nav-links a, .footer a { transition: color .2s ease; }
.nav-links a:hover, .footer a:hover { color: var(--blue); }
.nav-cta { background: var(--ink); color: #fff; border-radius: 999px; padding: 12px 18px; font-size: 12px; font-weight: 700; transition: transform .2s, background .2s; }
.nav-cta:hover { transform: translateY(-2px); background: var(--blue); }
.section-pad { width: min(1160px, calc(100% - 56px)); margin: 0 auto; }
.hero { min-height: 640px; display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 40px; padding-top: 50px; padding-bottom: 65px; }
.eyebrow { display: flex; align-items: center; gap: 9px; color: var(--blue); font-family: "Outfit", sans-serif; font-size: 11px; font-weight: 700; letter-spacing: .14em; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 4px rgba(185,241,199,.38); }
.hero h1 { margin: 22px 0 20px; font-size: clamp(52px, 6vw, 82px); line-height: 1.02; letter-spacing: -.09em; font-weight: 800; }
h1 em, h2 em { color: var(--blue); font-style: normal; }
.hero-lead { color: var(--muted); font-size: 16px; line-height: 1.85; letter-spacing: -.04em; }
.hero-actions { display: flex; align-items: center; gap: 22px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; gap: 17px; border-radius: 999px; padding: 16px 20px 16px 23px; font-size: 13px; font-weight: 700; }
.button-primary { color: #fff; background: var(--blue); box-shadow: 0 11px 25px rgba(76,112,245,.22); transition: transform .2s, background .2s; }
.button-primary:hover { background: var(--blue-dark); transform: translateY(-2px); }
.button-primary span { font-size: 18px; line-height: 0; }
.text-link { color: var(--muted); font-size: 12px; font-weight: 700; }
.text-link span { margin-left: 7px; color: var(--blue); }
.hero-note { display: flex; align-items: center; gap: 8px; margin-top: 62px; color: #a1a2a8; font-size: 11px; }
.note-icon { color: var(--blue); font-size: 16px; }
.hero-visual { position: relative; min-height: 520px; display: grid; place-items: center; }
.glow { position: absolute; border-radius: 50%; filter: blur(1px); }
.glow-one { width: 375px; height: 375px; background: rgba(76,112,245,.1); top: 82px; left: 50%; transform: translateX(-50%); }
.glow-two { width: 120px; height: 120px; background: rgba(185,241,199,.5); right: 0; bottom: 30px; filter: blur(18px); }
.phone { position: relative; z-index: 2; width: 268px; height: 522px; padding: 9px; border-radius: 35px; background: #282b36; box-shadow: 22px 28px 55px rgba(28,34,62,.25), inset 0 0 0 1px rgba(255,255,255,.12); transform: rotate(5deg); }
.phone::after { content: ""; position: absolute; inset: 7px; border: 1px solid rgba(255,255,255,.12); border-radius: 29px; pointer-events: none; }
.phone-speaker { position: absolute; z-index: 3; top: 17px; left: 50%; width: 60px; height: 5px; border-radius: 9px; background: #11131d; transform: translateX(-50%); }
.phone-screen { height: 100%; overflow: hidden; padding: 40px 18px 18px; border-radius: 27px; background: #f8f8f5; }
.app-top { display: flex; align-items: center; gap: 7px; color: var(--ink); font-family: "Outfit", sans-serif; font-size: 10px; font-weight: 700; }
.app-logo { display: grid; place-items: center; width: 21px; height: 21px; border-radius: 7px; color: #fff; background: var(--blue); font-size: 12px; }
.app-menu { margin-left: auto; color: #b6b7bd; letter-spacing: 2px; }
.session-label { display: flex; justify-content: space-between; margin: 42px 0 15px; color: #a2a3a9; font-size: 9px; font-weight: 700; }
.session-label span { color: var(--blue); }
.word-card { position: relative; display: flex; flex-direction: column; align-items: center; padding: 28px 10px 23px; border-radius: 19px; background: #fff; box-shadow: 0 9px 20px rgba(20,25,45,.06); }
.word-kana { font-family: "Outfit", sans-serif; font-size: 29px; font-weight: 700; letter-spacing: .03em; }
.word-card strong { margin-top: 4px; font-size: 13px; }
.word-romaji { margin-top: 7px; color: #a3a5ad; font-family: "Outfit", sans-serif; font-size: 10px; }
.sound-button { position: absolute; right: 12px; bottom: 12px; border: 0; color: var(--blue); background: transparent; font-size: 15px; cursor: pointer; }
.sound-button span { font-size: 8px; letter-spacing: -3px; }
.cassette { position: relative; height: 127px; margin-top: 17px; padding-top: 18px; border-radius: 12px; background: #dce8ff; box-shadow: inset 0 0 0 1px rgba(76,112,245,.08); }
.cassette-label { position: relative; z-index: 1; text-align: center; color: #5a77cc; font-family: "Outfit", sans-serif; font-size: 8px; font-weight: 700; letter-spacing: .18em; }
.cassette-label small { margin-left: 6px; color: #8196d5; font-size: 7px; letter-spacing: .05em; }
.reel { position: absolute; top: 48px; width: 37px; height: 37px; border: 7px solid #8da5e8; border-radius: 50%; background: #cfddfb; box-shadow: inset 0 0 0 5px #dce8ff; }
.reel::after { content: ""; position: absolute; inset: 10px; border-radius: 50%; background: #8da5e8; }
.reel-left { left: 40px; } .reel-right { right: 40px; }
.cassette-line { position: absolute; left: 32px; right: 32px; bottom: 13px; height: 3px; border-radius: 2px; background: #9db3ec; }
.progress { height: 4px; margin: 19px 0 10px; overflow: hidden; border-radius: 5px; background: #e5e5e1; }
.progress span { display: block; width: 42%; height: 100%; border-radius: inherit; background: var(--blue); }
.phone-footer { display: flex; justify-content: space-between; color: #a4a5aa; font-size: 8px; }
.floating-card { position: absolute; z-index: 3; display: flex; align-items: center; gap: 10px; padding: 13px 16px 13px 12px; border: 1px solid rgba(255,255,255,.7); border-radius: 14px; background: rgba(255,255,255,.86); box-shadow: 0 13px 30px rgba(41,48,83,.1); backdrop-filter: blur(12px); }
.floating-card b, .floating-card small { display: block; }
.floating-card b { font-size: 10px; letter-spacing: -.04em; }
.floating-card small { margin-top: 3px; color: #999ba3; font-size: 8px; }
.floating-card-top { top: 100px; right: 3px; } .floating-card-bottom { bottom: 88px; left: 0; }
.mini-icon { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 9px; color: var(--blue); background: #e7edff; font-size: 16px; }
.mini-icon-green { color: #23945a; background: #e1f6e7; }
.tape-deco { position: absolute; z-index: 1; width: 170px; height: 120px; border-radius: 15px; opacity: .78; transform: rotate(-17deg); }
.tape-deco-back { right: 30px; bottom: 52px; background: #cbd8ff; box-shadow: inset 0 0 0 12px #b9caff; }
.trust-strip { width: 100%; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 24px max(28px, calc((100% - 1160px) / 2)); display: flex; align-items: center; justify-content: space-between; color: #aaaab0; font-size: 11px; }
.trust-items { display: flex; gap: 32px; color: #6d6f79; font-size: 11px; font-weight: 600; }
.trust-items i { display: inline-grid; place-items: center; width: 23px; height: 23px; margin-right: 6px; border-radius: 50%; color: var(--blue); background: #e8edff; font-style: normal; font-family: "Outfit", sans-serif; font-size: 9px; }
.why { padding-top: 145px; padding-bottom: 146px; }
.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 40px; }
.section-heading h2, .flow-intro h2 { margin: 18px 0 0; font-size: clamp(34px, 4vw, 51px); line-height: 1.14; letter-spacing: -.09em; }
.section-heading p { max-width: 300px; margin: 35px 0 0; color: var(--muted); font-size: 13px; line-height: 1.8; letter-spacing: -.05em; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 68px; }
.feature-card { position: relative; min-height: 284px; overflow: hidden; padding: 27px 28px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; }
.feature-card-dark { color: #fff; border-color: var(--navy); background: var(--navy); }
.feature-number { color: #b0b1b8; font-family: "Outfit", sans-serif; font-size: 10px; font-weight: 600; }
.feature-card-dark .feature-number { color: #717681; }
.feature-symbol { margin: 34px 0 23px; color: var(--blue); font-family: "Outfit", sans-serif; font-size: 29px; font-weight: 700; letter-spacing: -.15em; }
.symbol-repeat { font-size: 39px; letter-spacing: 0; } .symbol-quiz { font-size: 25px; }
.feature-card h3 { margin: 0 0 10px; font-size: 17px; letter-spacing: -.06em; }
.feature-card p { max-width: 230px; margin: 0; color: #85868d; font-size: 11px; line-height: 1.75; letter-spacing: -.04em; }
.feature-card-dark p { color: #a6a8b1; }
.feature-line { position: absolute; right: 28px; bottom: 29px; left: 28px; height: 1px; background: #ededeb; }
.feature-card-dark .feature-line { background: #2d303b; }
.flow { display: grid; grid-template-columns: .78fr 1.22fr; gap: 100px; padding-top: 102px; padding-bottom: 132px; border-top: 1px solid var(--line); }
.flow-intro p { margin-top: 24px; color: var(--muted); font-size: 13px; }
.flow-steps { padding-top: 10px; }
.flow-step { display: flex; align-items: center; gap: 24px; min-height: 110px; border-bottom: 1px solid var(--line); }
.step-index { width: 30px; color: var(--blue); font-family: "Outfit", sans-serif; font-size: 11px; font-weight: 700; }
.flow-step h3 { margin: 0 0 6px; font-size: 17px; letter-spacing: -.06em; }
.flow-step p { margin: 0; color: var(--muted); font-size: 12px; }
.step-arrow { margin-left: auto; color: #b5b6ba; font-family: "Outfit", sans-serif; font-size: 20px; }
.flow-step:last-child .step-arrow { color: var(--blue); }
.start-banner { padding-bottom: 80px; }
.start-inner { display: flex; align-items: center; justify-content: space-between; min-height: 280px; padding: 46px 65px; overflow: hidden; border-radius: var(--radius-lg); color: #fff; background: var(--blue); }
.eyebrow-light { color: #becaff; }
.start-inner h2 { margin: 18px 0 12px; font-size: clamp(32px, 4vw, 48px); line-height: 1.13; letter-spacing: -.09em; }
.start-inner p { margin: 0; color: #d3dcff; font-size: 13px; }
.start-badge { display: flex; flex-direction: column; align-items: center; justify-content: center; width: 155px; height: 155px; border: 1px solid rgba(255,255,255,.3); border-radius: 50%; transform: rotate(8deg); }
.start-badge span { display: grid; place-items: center; width: 36px; height: 36px; margin-bottom: 10px; border-radius: 12px; color: var(--blue); background: #fff; font-family: "Outfit", sans-serif; font-size: 20px; }
.start-badge b { font-size: 13px; } .start-badge small { margin-top: 4px; color: #d1d9ff; font-size: 8px; }
.footer { width: min(1160px, calc(100% - 56px)); margin: 0 auto; padding: 30px 0 36px; display: flex; align-items: center; gap: 25px; color: #a4a5aa; font-size: 10px; }
.footer .brand { color: var(--ink); font-size: 15px; }
.footer p { margin: 0 auto 0 0; } .footer a:last-of-type { color: #777982; }
.copyright { color: #bbbcc0; }
@media (max-width: 800px) {
  .topbar { width: min(100% - 36px, 580px); height: 72px; }
  .nav-links { display: none; }
  .nav-cta { margin-left: auto; }
  .section-pad { width: min(100% - 36px, 580px); }
  .hero { display: flex; flex-direction: column; align-items: stretch; padding-top: 55px; gap: 25px; }
  .hero h1 { font-size: clamp(51px, 15vw, 75px); }
  .hero-note { margin-top: 39px; }
  .hero-visual { min-height: 530px; margin-top: 6px; }
  .phone { transform: rotate(3deg) scale(.94); }
  .floating-card-top { right: -2px; top: 75px; } .floating-card-bottom { left: -4px; bottom: 65px; }
  .trust-strip { display: block; padding: 23px 18px; text-align: center; }
  .trust-items { justify-content: center; flex-wrap: wrap; gap: 14px 18px; margin-top: 18px; }
  .why { padding-top: 98px; padding-bottom: 98px; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 24px; }
  .feature-grid { grid-template-columns: 1fr; margin-top: 42px; }
  .feature-card { min-height: 220px; }
  .feature-symbol { margin-top: 23px; }
  .flow { display: block; padding-top: 80px; padding-bottom: 90px; }
  .flow-steps { margin-top: 45px; }
  .start-inner { display: block; min-height: 400px; padding: 38px 29px; }
  .start-badge { margin: 38px auto 0; }
  .footer { width: min(100% - 36px, 580px); flex-wrap: wrap; gap: 12px 20px; }
  .footer p { width: 100%; order: 5; }
  .copyright { margin-left: auto; }
}
@media (max-width: 380px) {
  .nav-cta { padding: 11px 13px; font-size: 11px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 17px; }
  .floating-card { transform: scale(.86); transform-origin: center; }
  .floating-card-top { right: -22px; } .floating-card-bottom { left: -23px; }
}