:root {
  --ink: #172444;
  --muted: #52627e;
  --paper: #f7f4eb;
  --blue: #2666c7;
  --red: #e44c43;
  --border: #d7dddf;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Noto Sans KR", "Malgun Gothic", sans-serif; line-height: 1.65; }
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid #3778df; outline-offset: 4px; }
.site-shell { width: min(1200px, calc(100% - 64px)); margin: 0 auto; }
.site-header { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--border); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; text-decoration: none; font-size: 16px; white-space: nowrap; }
.brand-mark { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 10px; color: white; background: #294f9a; font-size: 18px; }
.site-header nav { display: flex; flex-wrap: wrap; gap: 24px; font-size: 14px; font-weight: 700; }
.site-header nav a { text-decoration: none; }
.site-header nav a:hover, .text-link:hover { color: var(--blue); }
.hero { display: grid; grid-template-columns: .88fr 1.12fr; align-items: center; gap: clamp(28px,5vw,70px); padding: 74px 0 88px; }
.eyebrow { margin: 0 0 14px; font-size: 13px; font-weight: 800; letter-spacing: .02em; color: var(--blue); }
h1,h2,h3,p,figure { margin-top: 0; }
h1 { margin-bottom: 20px; font-family: "Jua","Noto Sans KR",sans-serif; font-size: clamp(49px,5.4vw,72px); line-height: 1.09; letter-spacing: -.03em; }
h1 span { color: var(--red); }
.hero-lead { margin-bottom: 15px; font-size: clamp(22px,2.4vw,30px); font-weight: 800; line-height: 1.45; letter-spacing: -.035em; }
.hero-description { max-width: 480px; margin-bottom: 25px; color: var(--muted); font-size: 16px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 22px; }
.store-status { display: inline-flex; min-height: 48px; align-items: center; padding: 11px 18px; border-radius: 12px; background: #e3e7e7; color: #43516a; font-size: 14px; font-weight: 800; }
.text-link { font-size: 14px; font-weight: 800; text-decoration: none; }
.hero-caption { margin: 14px 0 0; color: #68758a; font-size: 13px; }
.hero-visual { margin: 0; overflow: hidden; border: 1px solid #cad7df; border-radius: 20px; background: #fff; box-shadow: 0 18px 50px rgba(27,55,85,.12); transform: rotate(1deg); }
.visual-top { display: flex; justify-content: space-between; align-items: center; min-height: 42px; padding: 0 16px; font-size: 12px; font-weight: 800; color: #4c5b72; }
.visual-top span:last-child { color: #9ca9b8; letter-spacing: 3px; font-size: 9px; }
.hero-visual img, .home-visual img { display: block; width: 100%; height: auto; }
.hero-visual figcaption, .home-visual figcaption { padding: 9px 14px 11px; color: #69768b; font-size: 12px; }
.intro-section { padding: 78px 0; border-top: 1px solid var(--border); }
.section-heading { max-width: 680px; margin-bottom: 32px; }
.section-heading h2, .classroom-copy h2 { margin-bottom: 12px; font-family: "Jua","Noto Sans KR",sans-serif; font-size: clamp(32px,3.5vw,44px); line-height: 1.25; letter-spacing: -.03em; }
.section-heading > p:last-child { color: var(--muted); margin: 0; }
.feature-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
.feature-grid article { min-height: 210px; padding: 26px; border: 1px solid #e2e4df; border-radius: 16px; background: #fff; }
.feature-icon { display: grid; place-items: center; width: 43px; height: 43px; border-radius: 13px; font-size: 21px; font-weight: 800; }
.icon-blue { color: #275daf; background: #e2edff; }
.icon-yellow { color: #835400; background: #fff1bd; }
.icon-red { color: #a93631; background: #ffe1dc; }
.feature-grid h3, .steps h3 { margin: 17px 0 7px; font-size: 17px; line-height: 1.5; }
.feature-grid p, .steps p { margin: 0; color: var(--muted); font-size: 14px; }
.classroom-section { display: grid; grid-template-columns: 1fr 1fr; gap: 65px; align-items: start; padding: 78px 0; border-top: 1px solid var(--border); }
.steps { list-style: none; padding: 0; margin: 27px 0 0; display: grid; gap: 20px; }
.steps li { display: grid; grid-template-columns: 34px 1fr; gap: 12px; align-items: start; }
.steps li > span { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: #e4ebfa; color: #285ab0; font-size: 14px; font-weight: 800; }
.steps h3 { margin: 2px 0 3px; }
.home-visual { margin: 38px 0 0; overflow: hidden; border: 1px solid #cbdbe5; border-radius: 18px; background: #fff; box-shadow: 0 12px 35px rgba(27,55,85,.09); }
.network-note { display: flex; align-items: flex-start; gap: 15px; margin-bottom: 65px; padding: 24px 28px; border: 1px solid #c9d8ee; border-radius: 16px; background: #edf4ff; }
.note-icon { display: grid; flex: 0 0 auto; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: #2f67b5; color: white; font-weight: 800; }
.network-note h2 { margin: 0 0 5px; font-size: 17px; }
.network-note p { margin: 0; color: #455a76; font-size: 14px; }
.site-footer { margin-bottom: 12px; }
@media (max-width: 760px) {
  .site-shell { width: min(100% - 36px, 600px); }
  .site-header { min-height: 72px; flex-wrap: wrap; padding: 14px 0; gap: 12px; }
  .site-header nav { gap: 16px; font-size: 13px; }
  .hero { grid-template-columns: 1fr; gap: 32px; padding: 46px 0 60px; }
  h1 { font-size: clamp(46px,11vw,62px); }
  .hero-visual { transform: none; }
  .intro-section, .classroom-section { padding: 55px 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid article { min-height: 0; padding: 22px; }
  .classroom-section { grid-template-columns: 1fr; gap: 24px; }
  .home-visual { margin: 0; }
  .network-note { margin-bottom: 42px; padding: 20px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }