:root {
  --blue: #0025c4;
  --lime: #bfff48;
  --ink: #191919;
  --paper: #f7f7ef;
  --line: #d6dac9;
  font-family: system-ui, "Malgun Gothic", sans-serif;
  color: var(--ink);
  background: var(--paper);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body, h1, h2, h3, p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid #914c00; outline-offset: 4px; }
.wrap { width: min(1120px, calc(100% - 64px)); margin-inline: auto; }
.top { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-inline: max(32px, calc((100% - 1120px)/2)); }
.return { font: 900 15px Nunito, sans-serif; white-space: nowrap; }
.return span { margin-left: 8px; font-size: 12px; color: #50584f; }
.edition, .eyebrow, .route-meta, .facts span, .foot { font: 900 11px Nunito, system-ui, sans-serif; letter-spacing: .12em; }
.hero { background: var(--blue); color: white; overflow: hidden; }
.hero-inner { display: grid; grid-template-columns: 1.14fr 1fr; align-items: center; gap: clamp(28px, 6vw, 90px); padding-block: clamp(52px, 7vw, 100px); }
.hero-copy { min-width: 0; }
.hero-copy .eyebrow { display: flex; align-items: center; gap: 8px; color: #e1e8ff; }
.hero-copy .eyebrow i { width: 8px; height: 8px; border-radius: 50%; background: var(--lime); }
h1 { font: 900 clamp(52px, 7.6vw, 118px)/.93 Nunito, system-ui, sans-serif; letter-spacing: -.075em; margin: 25px 0 21px; white-space: nowrap; }
h1 > span { color: var(--lime); }
h1 .ko-name { display: block; font: 800 clamp(17px, 2.2vw, 30px)/1.2 system-ui, sans-serif; letter-spacing: -.055em; margin-top: 12px; }
.hero-line { font-size: clamp(29px, 4.1vw, 54px); font-weight: 850; letter-spacing: -.075em; line-height: 1.13; word-break: keep-all; }
.hero-summary { color: #e3eaff; font-size: 15px; line-height: 1.75; margin-top: 17px; max-width: 32em; word-break: keep-all; }
.hero-link { display: inline-flex; align-items: center; gap: 22px; margin-top: 24px; padding: 13px 17px; border-radius: 8px; background: var(--lime); color: #192400; font-size: 14px; font-weight: 800; }
.hero-link:focus-visible { outline-color: white; }
.hero-link:hover { background: #dcff9b; }
.route-art { min-width: 0; padding: 20px; border-radius: 22px; transform: rotate(-3deg); color: var(--ink); background: linear-gradient(90deg,#13263519 1px,transparent 1px), linear-gradient(#13263519 1px,transparent 1px), var(--lime); background-size: 26px 26px; box-shadow: 12px 14px #07115e88; }
.route-art svg { display: block; width: 100%; height: auto; }
.route-meta { display: flex; justify-content: space-between; gap: 8px; }
.facts { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; border-bottom: 1px solid var(--line); padding-block: 25px; }
.facts div { display: grid; gap: 5px; }
.facts span, .section .eyebrow { color: var(--blue); }
.facts strong { font-size: 14px; }
.section { padding-block: clamp(54px, 8vw, 94px); }
.section h2 { margin-top: 12px; font-size: clamp(29px, 5.4vw, 54px); line-height: 1.14; letter-spacing: -.07em; word-break: keep-all; }
.problem-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 25px; }
.problem-grid article { border: 1px solid var(--line); border-radius: 14px; background: #fff; padding: 24px; }
.label { display: inline-block; background: #e9eefd; border-radius: 5px; color: #00209f; padding: 5px 8px; font-size: 12px; font-weight: 800; }
.problem-grid h3, .step h3 { font-size: 23px; letter-spacing: -.06em; margin: 12px 0 8px; }
.problem-grid p, .step-copy p:not(.eyebrow), .section-intro, .takeaway { color: #444f48; line-height: 1.75; font-size: 15px; word-break: keep-all; }
.takeaway { margin-top: 14px; padding: 13px 18px; border-left: 4px solid var(--blue); background: #edf0f9; }
.experience { background: #edf0e5; border-block: 1px solid var(--line); scroll-margin-top: 16px; }
.section-intro { margin-top: 12px; }
.demo { margin-top: 25px; }
.demo-controls { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.demo-controls button { cursor: pointer; border: 1px solid #b7c4ac; border-radius: 8px; min-height: 44px; padding: 8px 13px; color: #222f1a; background: white; font-weight: 750; }
.demo-controls button small { margin-right: 5px; color: #4d6651; }
.demo-controls button[aria-pressed="true"] { color: white; background: var(--blue); border-color: var(--blue); }
.demo-controls button[aria-pressed="true"] small { color: var(--lime); }
.step { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 24px; min-height: 224px; padding: clamp(20px,4vw,38px); background: white; border: 1px solid var(--line); border-radius: 16px; }
.step + .step { margin-top: 10px; }
.demo-controls:not([hidden]) ~ .step { margin-top: 0; }
.sample { display: grid; gap: 9px; padding: 20px; border: 1px solid #ced9b5; border-radius: 13px; background: #f6fae9; }
.sample > small { color: #354f25; font-weight: 800; }
.sample > strong { font-size: 18px; letter-spacing: -.035em; }
.sample p { color: #475440; font-size: 13px; }
.chips { display: flex; flex-wrap: wrap; gap: 5px; }
.chips span { color: #24360f; background: #e1f3c3; border-radius: 100px; padding: 5px 8px; font-size: 12px; font-weight: 750; }
.amount { white-space: nowrap; }
.bill { display: flex; justify-content: space-between; gap: 8px; border-top: 1px dashed #819175; padding-top: 8px; }
.foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-block: 25px; }
.foot a { color: var(--blue); letter-spacing: 0; }
@media (max-width: 760px) {
  .wrap { width: calc(100% - 40px); }
  .top { padding-inline: 20px; }
  .hero-inner { grid-template-columns: 1fr; gap: 35px; }
  .route-art { max-width: 460px; margin: 0 7px; }
  .problem-grid, .step { grid-template-columns: 1fr; }
}
@media (max-width: 410px) {
  .return span { display: none; }
  .route-meta { font-size: 9px; }
  .facts { gap: 10px; }
  .facts strong { font-size: 12px; }
  .demo-controls { display: grid; grid-template-columns: 1fr 1fr; }
  .foot { align-items: flex-start; flex-direction: column; }
}