/* 소개(landing) 화면 전용 — 레이아웃 없이 단독으로 그리는 페이지라 base.css 를 쓰지 않고
   여기서 필요한 토큰을 전부 정의한다. 색은 v4 실제 화면(base.css)의 브랜드 블루를 그대로 쓴다 —
   랜딩과 로그인 뒤 화면이 다른 제품처럼 보이면 안 된다. */
:root {
  --ink: #171a20; --ink-soft: #5c6472; --ink-faint: #8b93a1;
  --paper: #fff; --ground: #f4f5f7; --sunk: #f1f3f6;
  --rule: #dde1e8; --rule-soft: #eceef2;
  --key: #2f6fed; --key-deep: #1d4ed8; --key-tint: #e8f0fe;
  --ok: #1f9254; --ok-tint: #e6f6ec;
  --radius: 10px; --radius-sm: 6px; --radius-lg: 18px; --pill: 100px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 1px 2px rgba(20,21,26,.04), 0 8px 24px -12px rgba(20,21,26,.16);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: -apple-system, "Segoe UI", sans-serif; font-size: 16px; line-height: 1.7;
}
img { max-width: 100%; display: block; }

.wrap { width: 100%; max-width: 72rem; margin-inline: auto; padding-inline: 1.25rem; }
@media (min-width: 48rem) { .wrap { padding-inline: 2rem; } }

/* ── 상단바 ─────────────────────────────── */
.top {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 255, 255, .9); border-bottom: 1px solid var(--rule-soft);
}
.top-in { display: flex; align-items: center; gap: .75rem; padding-block: .7rem; }
.logo { font-weight: 800; font-size: 1.125rem; letter-spacing: -.02em; color: var(--ink); text-decoration: none; }
.logo span { color: var(--key); }
.top-sp { flex: 1; }
.enter {
  font-size: .875rem; font-weight: 700; color: var(--ink); text-decoration: none;
  padding: .5rem .9rem; border-radius: var(--radius-sm); min-height: 40px;
  display: inline-flex; align-items: center;
}
.enter:hover { background: var(--sunk); }

/* ── 단추 ───────────────────────────────── */
.btn {
  font: inherit; font-size: 1rem; font-weight: 700;
  background: var(--key); color: #fff; border: 1px solid transparent;
  border-radius: var(--radius); padding: .8rem 1.5rem; min-height: 52px;
  cursor: pointer; text-decoration: none;
  display: inline-flex; align-items: center; justify-content: center;
}
.btn:hover { background: var(--key-deep); }
.btn.ghost { background: var(--sunk); color: var(--ink); }
.btn.ghost:hover { background: var(--rule); }
.cta-row { display: flex; gap: .625rem; flex-wrap: wrap; justify-content: center; }
.share-btn {
  font: inherit; font-size: .9375rem; font-weight: 700; color: var(--key-deep);
  background: none; border: 0; cursor: pointer; min-height: 44px; padding: .4rem .75rem;
  display: inline-flex; align-items: center; gap: .4rem; border-radius: var(--radius-sm);
}
.share-btn:hover { background: var(--key-tint); }
.share-btn svg { width: 1.1rem; height: 1.1rem; }
.band.end .share-btn { color: #fff; }
.band.end .share-btn:hover { background: rgba(255, 255, 255, .12); }
.share-msg { min-height: 1.25rem; margin: .25rem 0 0; font-size: .8125rem; color: var(--ink-soft); }
.band.end .share-msg { color: #A7ADBF; }

/* ── 히어로 ─────────────────────────────── */
.hero { background: var(--ground); padding-block: 4rem; text-align: center; }
.eyebrow {
  font-family: var(--mono); font-size: .75rem; font-weight: 600;
  letter-spacing: .04em; text-transform: uppercase; color: var(--key);
  margin: 0 0 1rem;
}
.hero h1 {
  font-size: clamp(2.25rem, 6.2vw, 4.5rem); font-weight: 800; line-height: 1.12;
  letter-spacing: -.035em; margin: 0 0 1rem;
}
.hero h1 u { color: var(--key); text-decoration: none; }
.lede { margin: 0 auto 1.5rem; max-width: 34rem; font-size: 1.0625rem; color: var(--ink-soft); }
.under { margin: .9rem 0 0; font-size: .8125rem; color: var(--ink-faint); }

/* 히어로 아래 숫자 타일 */
.figs { display: grid; gap: .75rem; grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
        margin-top: 3rem; }
.fig {
  background: var(--paper); border: 1px solid var(--rule-soft);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
  padding: 1.25rem 1.15rem; text-align: center;
}
.fig b { display: block; font-size: 2rem; font-weight: 800; letter-spacing: -.03em;
         font-variant-numeric: tabular-nums; line-height: 1.15; }
.fig span { display: block; margin-top: .3rem; font-size: .8125rem; color: var(--ink-faint); }

/* ── 띠 ─────────────────────────────────── */
.band { padding-block: 5rem; }
.band.alt { background: var(--ground); }
.band.end { background: var(--ink); color: #fff; text-align: center; padding-bottom: 1.5rem; }
.band.end .sub { color: #A7ADBF; }
.h2 {
  font-size: clamp(1.625rem, 3.4vw, 2.5rem); font-weight: 800; line-height: 1.2;
  letter-spacing: -.03em; margin: 0 0 .625rem; text-align: center;
}
.sub { margin: 0 auto 2.5rem; max-width: 36rem; color: var(--ink-soft); font-size: 1rem; text-align: center; }
.pay-note { margin-top: 1.25rem; }

/* 다섯 단계. 번호가 실제 순서를 뜻한다. */
.thread { display: grid; gap: .75rem; }
.step {
  display: grid; gap: .15rem 1rem; align-items: start;
  grid-template-columns: 2.5rem 1fr;
  background: var(--paper); border: 1px solid var(--rule-soft);
  border-radius: var(--radius); box-shadow: var(--shadow-sm); padding: 1.15rem 1.25rem;
}
.step .no {
  font-family: var(--mono); font-size: .8125rem; font-weight: 600;
  color: var(--key-deep); background: var(--key-tint);
  border-radius: var(--radius-sm); text-align: center; padding: .3rem 0;
}
.step h3 { margin: 0; font-size: 1.0625rem; font-weight: 700; letter-spacing: -.01em; }
.step .tag {
  display: inline-block; font-family: var(--mono); font-size: .75rem;
  color: var(--ink-faint); background: var(--sunk);
  padding: .1rem .45rem; border-radius: var(--pill); margin-top: .2rem;
}
.step > p { grid-column: 2; margin: .45rem 0 0; font-size: .9375rem; color: var(--ink-soft); }

/* 누가 쓰나 */
.who-grid { display: grid; gap: .75rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.who-card {
  background: var(--paper); border: 1px solid var(--rule-soft);
  border-radius: var(--radius); box-shadow: var(--shadow-sm); padding: 1.25rem;
}
.who-card b { display: block; font-size: .9375rem; margin-bottom: .35rem; }
.who-card p { margin: 0; font-size: .875rem; color: var(--ink-soft); }

/* 요금 */
.tiers { display: grid; gap: .875rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.tier {
  background: var(--paper); border: 1px solid var(--rule-soft);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
  padding: 1.5rem 1.375rem; display: flex; flex-direction: column;
}
.tier.pick { border-color: var(--key); box-shadow: var(--shadow); }
.tier > b { font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-faint); }
.tier.pick > b { color: var(--key); }
.price { margin: .5rem 0 1.25rem; font-size: 1.875rem; font-weight: 800; letter-spacing: -.03em; }
.price em { font-style: normal; font-size: .875rem; font-weight: 500; color: var(--ink-faint); }
.tier ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; font-size: .9375rem; }
.tier li { position: relative; padding-inline-start: 1.15rem; color: var(--ink-soft); }
.tier li::before {
  content: ""; position: absolute; inset-inline-start: 0; top: .62em;
  width: .375rem; height: .375rem; border-radius: 50%; background: var(--rule);
}
.tier.pick li::before { background: var(--key); }

/* 자주 묻는 것 */
.qa { max-width: 46rem; margin-inline: auto; display: grid; gap: .5rem; }
.qa details {
  background: var(--paper); border: 1px solid var(--rule-soft);
  border-radius: var(--radius); box-shadow: var(--shadow-sm); padding: .9rem 1.15rem;
}
.qa summary {
  cursor: pointer; font-weight: 700; font-size: .9375rem; list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: "+"; color: var(--key); font-weight: 700; font-size: 1.1rem; }
.qa details[open] summary::after { content: "\2212"; }
.qa p { margin: .7rem 0 0; font-size: .9375rem; color: var(--ink-soft); }

.foot {
  display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; justify-content: center;
  margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid rgba(255, 255, 255, .12);
  font-size: .8125rem; color: #8A91A4;
}

:focus-visible { outline: 2px solid var(--key); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }