:root {
  --navy: #1F2A44;
  --navy-deep: #151D31;
  --sun: #F2A541;
  --cream: #F7F3EA;
  --paper: #FFFFFF;
  --ink: #16181D;
  --ink-soft: #3A3F4B;
  --muted: #5A5F6B;
  --line: #E4E0D6;
  --link: #1F2A44;
  --radius: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #12161F;
    --cream: #1A2030;
    --ink: #F2EFE8;
    --ink-soft: #CDD1DA;
    --muted: #A6ACB8;
    --line: #2C3446;
    --link: #F2A541;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans KR", "Apple SD Gothic Neo", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.7;
}

a { color: var(--link); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* 상단 메뉴 */
.nav { border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; justify-content: space-between; min-height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); text-decoration: none; font-weight: 800; font-size: 19px; }
.brand img { width: 36px; height: 36px; }
.nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 20px; margin: 0; padding: 0; font-size: 15px; }
.nav ul a { color: var(--ink-soft); text-decoration: none; display: inline-block; padding: 10px 0; }
.nav ul a:hover { color: var(--ink); text-decoration: underline; }

/* 첫 화면 */
.hero { background: var(--navy); color: #F7F3EA; }
.hero .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 48px; padding-top: 88px; padding-bottom: 88px; }
.hero-text { flex: 1 1 420px; min-width: 0; }
.hero h1 { margin: 0 0 16px; font-size: clamp(34px, 6vw, 54px); line-height: 1.2; letter-spacing: -0.02em; font-weight: 800; }
.hero p { margin: 0; font-size: 19px; color: #D9DDE6; max-width: 34em; }
.hero-icon { flex: 0 1 240px; display: flex; justify-content: center; }
.hero-icon img { width: 100%; max-width: 240px; height: auto; border-radius: 54px; box-shadow: 0 0 0 1px rgba(255,255,255,0.08); }
.hero .actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; min-height: 48px; padding: 0 22px; border-radius: 999px; font-weight: 700; font-size: 16px; text-decoration: none; }
.btn-sun { background: var(--sun); color: #16181D; }
.btn-sun:hover { background: #F6B964; }
.btn-ghost { color: #F7F3EA; box-shadow: inset 0 0 0 1.5px rgba(247,243,234,0.5); }
.btn-ghost:hover { box-shadow: inset 0 0 0 1.5px #F7F3EA; }

/* 본문 구역 */
section { padding: 80px 0; }
section.alt { background: var(--cream); }
h2 { margin: 0 0 12px; font-size: clamp(26px, 4vw, 34px); line-height: 1.3; letter-spacing: -0.01em; }
.lead { margin: 0 0 40px; color: var(--ink-soft); max-width: 40em; }
h3 { margin: 0 0 8px; font-size: 19px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
section.alt .card { border-color: transparent; }
.card p { margin: 0; color: var(--ink-soft); font-size: 16px; }
.step { display: inline-flex; width: 36px; height: 36px; border-radius: 50%; align-items: center; justify-content: center; background: var(--navy); color: var(--sun); font-weight: 800; margin-bottom: 16px; }
.card svg { width: 28px; height: 28px; margin-bottom: 14px; color: var(--link); }

.chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; padding: 0; list-style: none; }
.chips li { border: 1px solid var(--line); border-radius: 999px; padding: 6px 16px; font-size: 15px; background: var(--paper); }

.notice { border-radius: var(--radius); background: var(--paper); border: 1px solid var(--line); padding: 28px; }
.notice p { margin: 0 0 12px; }
.notice p:last-child { margin-bottom: 0; }

/* 문서 페이지 */
.doc { padding: 64px 0 96px; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: clamp(30px, 5vw, 40px); line-height: 1.3; margin: 0 0 8px; }
.doc .meta { color: var(--muted); font-size: 15px; margin: 0 0 40px; }
.doc h2 { font-size: 22px; margin: 48px 0 12px; }
.doc ul { padding-left: 1.3em; }
.doc li { margin-bottom: 6px; }
.doc table { width: 100%; border-collapse: collapse; font-size: 15px; }
.doc .table-box { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; }
.doc th, .doc td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc tr:last-child td { border-bottom: 0; }
.doc th { background: var(--cream); font-weight: 700; white-space: nowrap; }

/* 바닥글 */
footer { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 32px; justify-content: space-between; }
footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 20px; }
footer a { color: var(--ink-soft); }

@media (max-width: 600px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .hero .wrap { padding-top: 56px; padding-bottom: 56px; gap: 32px; }
  .hero-icon { order: -1; flex-basis: 120px; justify-content: flex-start; }
  .hero-icon img { max-width: 120px; border-radius: 27px; }
  section { padding: 56px 0; }
}