/* ============================================================
   판매 사이트 — 디자인 토큰
   돈콩나무(IBM Plex Sans KR · 네이비 · 그림자 3단계)의 결을 따른다.
   숫자는 JetBrains Mono 고정폭 — 표에서 자리가 맞아야 회계 자료로 보인다.
   ============================================================ */

:root {
  --ink:      #0F172A;
  --ink-2:    #1E293B;
  --ink-3:    #475569;
  --muted:    #94A3B8;
  --line:     #E2E8F0;
  --line-2:   #CBD5E1;
  --bg:       #FAFBFC;
  --surface:  #FFFFFF;

  --brand:      #0A3D62;
  --brand-2:    #0E5A8A;
  --brand-soft: #DAE6F0;
  --accent:     #12B981;
  --accent-soft:#D1FAE5;
  --warning:    #F59E0B;
  --warning-soft:#FEF3C7;
  --danger:     #DC2626;

  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(15,23,42,.04);
  --shadow-md: 0 4px 16px rgba(15,23,42,.06);
  --shadow-lg: 0 12px 40px rgba(15,23,42,.08);

  /* 어두운 면 — 히어로·강조 배너. 밝은 면과 겹쳐 제품 카드를 경계에 걸친다 */
  --dark:      #0B2942;
  --dark-2:    #0A3D62;
  --dark-line: rgba(255,255,255,.09);
  --on-dark:   #E2ECF4;
  --on-dark-2: #9FBBD0;

  --max: 1080px;
  --sans: 'IBM Plex Sans KR', -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo',
          'Malgun Gothic', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { color-scheme: light; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.7;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.num { font-family: var(--mono); font-feature-settings: 'tnum'; font-variant-numeric: tabular-nums; }

/* ── 헤더 ───────────────────────────────────────────────── */
header.top {
  background: rgba(11,41,66,.88);            /* 어두운 히어로와 이어지도록 */
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  position: sticky; top: 0; z-index: 50;
}
header.top .wrap { display: flex; align-items: center; gap: 28px; height: 64px; }
.brand {
  font-weight: 700; font-size: 17px; letter-spacing: -.02em; color: #fff;
  display: flex; align-items: center; gap: 9px;
}
.brand::before {
  content: ''; width: 9px; height: 22px; border-radius: 2px; flex: none;
  background: linear-gradient(180deg, #7FB3D5 0%, #2E7DB0 100%);
}
.brand:hover { text-decoration: none; }
nav.main { display: flex; align-items: stretch; gap: 22px; font-size: 14.5px; margin-left: auto; align-self: stretch; }
/* 링크를 헤더 높이만큼 늘려 밑줄이 아래 경계선에 정확히 붙게 한다 (떠 있으면 어긋나 보인다) */
nav.main a {
  color: var(--on-dark-2); font-weight: 500; position: relative;
  display: flex; align-items: center;
}
nav.main a:hover { color: #fff; text-decoration: none; }
nav.main a.on { color: #fff; font-weight: 600; }
nav.main a.on::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: #7FB3D5;
}
nav.main a.cta {
  background: #fff; color: var(--dark); padding: 8px 16px; border-radius: var(--r-sm);
  font-weight: 600; box-shadow: var(--shadow-sm); align-self: center;
}
nav.main a.cta:hover { background: #DCE9F2; color: var(--dark); }
nav.main a.cta::after { display: none; }

/* ── 히어로 (어두운 면 + 장부 괘선) ────────────────────── */
.dark {
  background: var(--dark);
  /* 장부 괘선 — 32px 간격 가로줄. 아래로 갈수록 옅어진다 */
  background-image:
    repeating-linear-gradient(to bottom, transparent 0 31px, var(--dark-line) 31px 32px),
    radial-gradient(120% 80% at 15% 0%, rgba(14,90,138,.55) 0%, transparent 60%);
  color: var(--on-dark);
  position: relative;
}
.dark::after {                       /* 아래쪽에서 괘선을 서서히 지운다 */
  content: ''; position: absolute; inset: auto 0 0 0; height: 260px;
  background: linear-gradient(to bottom, transparent, var(--dark)); pointer-events: none;
}
.dark > * { position: relative; z-index: 1; }

.hero { padding: 96px 0 0; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 12.5px; font-weight: 600;
  color: var(--on-dark); background: rgba(255,255,255,.08); padding: 7px 14px;
  border: 1px solid var(--dark-line); border-radius: 999px;
  letter-spacing: .01em; margin-bottom: 26px;
}
.eyebrow::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 3px rgba(18,185,129,.22);
}
.hero h1 {
  font-size: 60px; font-weight: 700; line-height: 1.16; letter-spacing: -.042em;
  color: #fff; margin-bottom: 26px;
}
.hero h1 em { font-style: normal; color: #7FB3D5; }
.hero .lead { font-size: 19px; color: var(--on-dark-2); max-width: 640px; line-height: 1.7; }
.hero .lead b { color: #fff; font-weight: 600; }

/* 어두운 면 위 밝은 면 — 제품 카드가 경계에 걸치게 (Stripe·Linear 구성) */
.overlap { margin-top: 56px; margin-bottom: -140px; }
.after-overlap { padding-top: 172px; }

/* 페이지 제목(하위 페이지) */
.pagehead { padding: 76px 0 44px; border-bottom: 1px solid var(--line); }
.pagehead h1 { font-size: 40px; font-weight: 700; letter-spacing: -.03em; color: var(--ink); margin-bottom: 16px; }
.pagehead .lead { font-size: 17.5px; color: var(--ink-3); max-width: 720px; }

/* ── 제품 미리보기 (실제 산출물 재현) ──────────────────── */
.shot {
  margin-top: 52px; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-lg); box-shadow: var(--shadow-lg); overflow: hidden;
}
.overlap .shot {
  margin-top: 0;
  box-shadow: 0 30px 70px -20px rgba(4,20,35,.55), 0 0 0 1px rgba(255,255,255,.06);
}
.shot .bar {
  display: flex; align-items: center; gap: 8px; padding: 12px 18px;
  background: #F8FAFC; border-bottom: 1px solid var(--line);
}
.shot .bar i { width: 10px; height: 10px; border-radius: 50%; background: #E2E8F0; display: block; }
.shot .bar span { font-size: 12.5px; color: var(--muted); margin-left: 8px; font-weight: 500; }
.shot .body { padding: 26px 28px 30px; }
.shot .cap {
  padding: 14px 28px; border-top: 1px solid var(--line); background: #FCFDFE;
  font-size: 13px; color: var(--muted);
}

.kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 24px; }
.kpi { border: 1px solid var(--line); border-radius: var(--r-md); padding: 15px 17px; background: var(--surface); }
.kpi.hot { border-color: #FCA5A5; background: #FEF2F2; }
.kpi .k { font-size: 12.5px; color: var(--muted); font-weight: 500; margin-bottom: 6px; }
.kpi .v { font-size: 21px; font-weight: 700; letter-spacing: -.02em; color: var(--ink); }
.kpi.hot .v { color: var(--danger); }
.kpi .u { font-size: 13px; font-weight: 500; color: var(--ink-3); margin-left: 2px; }

/* ── 표 ─────────────────────────────────────────────────── */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.grid { width: 100%; border-collapse: collapse; font-size: 14px; }
table.grid th {
  text-align: left; font-weight: 600; color: var(--ink-3); background: #F8FAFC;
  padding: 10px 14px; border-bottom: 1px solid var(--line); white-space: nowrap;
}
table.grid td { padding: 11px 14px; border-bottom: 1px solid var(--line); color: var(--ink-2); vertical-align: top; }
table.grid tr:last-child td { border-bottom: 0; }
table.grid td.r, table.grid th.r { text-align: right; }
table.grid tbody tr:hover td { background: #FAFBFC; }

.pill {
  display: inline-block; font-size: 11.5px; font-weight: 600; padding: 2px 9px;
  border-radius: 999px; line-height: 1.6; white-space: nowrap;
}
.pill.high { background: #FEE2E2; color: #B91C1C; }
.pill.mid  { background: var(--warning-soft); color: #B45309; }
.pill.low  { background: #F1F5F9; color: var(--ink-3); }
.pill.law  { background: #F1F5F9; color: var(--ink-3); font-family: var(--mono); font-size: 11px; font-weight: 500; }
.pill.soon { background: var(--warning-soft); color: #B45309; }

/* ── 장부의 두 줄 (합계 아래 긋는 그 줄) — 이 사이트의 서명 ── */
.dbl { border-bottom: 3px double var(--ink-3); }
table.grid tr.total td { border-bottom: 3px double var(--ink); font-weight: 700; color: var(--ink); }
table.grid tr.total:hover td { background: transparent; }
.sechead h2 { position: relative; display: inline-block; padding-bottom: 12px; }
.sechead h2::after {
  content: ''; position: absolute; left: 0; bottom: 0; width: 34px; height: 0;
  border-bottom: 3px double var(--brand);
}

/* ── 증명 숫자 띠 ───────────────────────────────────────── */
.proof {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.proof div { padding: 26px 24px; border-left: 1px solid var(--line); }
.proof div:first-child { border-left: 0; padding-left: 0; }
.proof .v {
  font-family: var(--mono); font-size: 30px; font-weight: 600; color: var(--ink);
  letter-spacing: -.03em; line-height: 1.2;
}
.proof .v span { font-size: 15px; color: var(--ink-3); font-family: var(--sans); margin-left: 3px; }
.proof .k { font-size: 13.5px; color: var(--muted); margin-top: 7px; }

/* ── 섹션 ───────────────────────────────────────────────── */
section { padding: 72px 0; }
section + section { border-top: 1px solid var(--line); }
.sechead { margin-bottom: 36px; max-width: 700px; }
.sechead h2 { font-size: 32px; font-weight: 700; letter-spacing: -.032em; color: var(--ink); margin-bottom: 14px; }
.sechead p { font-size: 16.5px; color: var(--ink-3); }

/* 스크롤 등장 — 아주 약하게.
   ★ 기본값은 '보임'이다. JS 가 살아 있을 때만 숨긴다(html.anim).
     관찰자가 안 돌거나 JS 가 죽으면 내용이 그냥 보인다 — 안 보이는 것이 최악이다. */
.rise { transition: opacity .5s ease, transform .5s ease; }
html.anim .rise { opacity: 0; transform: translateY(14px); }
html.anim .rise.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html.anim .rise { opacity: 1; transform: none; transition: none; }
}

/* 고객군 입구 — 큰 카드 */
.doors { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.door {
  display: block; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 26px 24px 24px; color: inherit;
  box-shadow: var(--shadow-sm); transition: box-shadow .18s ease, border-color .18s ease, transform .18s ease;
}
.door:hover {
  text-decoration: none; border-color: var(--brand); box-shadow: var(--shadow-md); transform: translateY(-2px);
}
.door .n { font-family: var(--mono); font-size: 12px; color: var(--muted); font-weight: 500; }
.door h3 { font-size: 19px; font-weight: 700; color: var(--ink); margin: 8px 0 10px; letter-spacing: -.02em; }
.door p { font-size: 14.5px; color: var(--ink-3); line-height: 1.65; }
.door .go { margin-top: 16px; font-size: 14px; font-weight: 600; color: var(--brand); }
.door:hover .go::after { margin-left: 8px; }
.door .go::after { content: '→'; margin-left: 5px; transition: margin .18s ease; display: inline-block; }

/* 원칙 — 카드 아님, 번호 붙은 줄 */
.rules { display: grid; gap: 0; border-top: 1px solid var(--line); }
.rule {
  display: grid; grid-template-columns: 56px 1fr 1.35fr; gap: 24px;
  padding: 26px 4px; border-bottom: 1px solid var(--line); align-items: baseline;
}
.rule .n { font-family: var(--mono); font-size: 13px; color: var(--brand); font-weight: 600; }
.rule h3 { font-size: 18px; font-weight: 700; color: var(--ink); letter-spacing: -.02em; }
.rule p { font-size: 15px; color: var(--ink-3); line-height: 1.7; }

/* 제품 목록 줄 */
.items { border-top: 1px solid var(--line); }
.item {
  display: grid; grid-template-columns: 220px 1fr; gap: 28px;
  padding: 22px 4px; border-bottom: 1px solid var(--line); align-items: baseline;
}
.item .nm { font-size: 16px; font-weight: 700; color: var(--ink); letter-spacing: -.015em; }
.item .nm .sub { display: block; font-size: 12.5px; font-weight: 500; color: var(--muted); margin-top: 3px; }
.item .ds { font-size: 14.8px; color: var(--ink-3); line-height: 1.7; }
.item .ds .pill { margin-right: 6px; vertical-align: 1px; }

/* 단계 */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: s; }
.step { counter-increment: s; }
.step::before {
  content: counter(s); display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 50%; background: var(--brand); color: #fff;
  font-family: var(--mono); font-size: 14px; font-weight: 600; margin-bottom: 14px;
}
.step h3 { font-size: 17px; font-weight: 700; color: var(--ink); margin-bottom: 8px; letter-spacing: -.02em; }
.step p { font-size: 14.5px; color: var(--ink-3); line-height: 1.68; }

/* 강조 배너 */
.callout {
  background: var(--dark); color: #fff; border-radius: var(--r-lg);
  padding: 44px 44px; box-shadow: var(--shadow-md); position: relative; overflow: hidden;
  background-image:
    repeating-linear-gradient(to bottom, transparent 0 31px, var(--dark-line) 31px 32px),
    radial-gradient(90% 120% at 100% 0%, rgba(14,90,138,.5) 0%, transparent 62%);
}
.callout > * { position: relative; z-index: 1; }
.callout h2 { font-size: 26px; font-weight: 700; letter-spacing: -.03em; margin-bottom: 12px; color: #fff; }
.callout p { font-size: 16.5px; color: #C7DDEC; max-width: 620px; }
.callout .actions { margin-top: 24px; }
.callout .btn.solid { background: #fff; color: var(--brand); border-color: #fff; }
.callout .btn.solid:hover { background: #EAF2F8; }
/* .btn 기본 배경이 흰색이라 어두운 면에서 흰 글씨가 묻힌다. 배경을 반드시 지운다 */
.callout .btn.ghost { border-color: rgba(255,255,255,.38); color: #fff; background: transparent; }
.callout .btn.ghost:hover { border-color: #fff; background: rgba(255,255,255,.10); }

.note {
  background: var(--warning-soft); border: 1px solid #FDE68A; color: #92400E;
  border-radius: var(--r-md); padding: 14px 18px; font-size: 14.5px; line-height: 1.65;
}
.quiet { color: var(--muted); font-size: 13.5px; line-height: 1.65; }
.ok { color: var(--accent); font-weight: 600; }

/* 버튼 */
.btn {
  display: inline-block; padding: 12px 22px; border-radius: var(--r-sm);
  border: 1px solid var(--brand); color: var(--brand); background: var(--surface);
  font-weight: 600; font-size: 15px; transition: all .16s ease;
}
.btn:hover { text-decoration: none; box-shadow: var(--shadow-sm); }
.btn.solid { background: var(--brand); color: #fff; }
.btn.solid:hover { background: var(--brand-2); }
.btn.ghost { border-color: var(--line-2); color: var(--ink-2); }
.btn.ghost:hover { border-color: var(--ink-3); }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }

/* 사장님이 채울 자리 */
.todo { background: #FEF08A; border-bottom: 2px dotted #A16207; padding: 0 4px; border-radius: 2px; }

/* 푸터 */
footer {
  border-top: 1px solid var(--line); background: var(--surface);
  padding: 34px 0 44px; margin-top: 24px; color: var(--muted); font-size: 13.5px;
}
footer .wrap { display: flex; gap: 24px; flex-wrap: wrap; justify-content: space-between; }

/* ── 무료 계산기 ────────────────────────────────────────── */
.calc { display: grid; gap: 20px; }
.calc fieldset {
  border: 1px solid var(--line); border-radius: var(--r-lg); padding: 22px 26px 26px;
  background: var(--surface); box-shadow: var(--shadow-sm);
}
.calc legend {
  font-weight: 700; font-size: 15px; color: var(--ink); padding: 0 10px;
  letter-spacing: -.02em;
}
.calc label.row {
  display: grid; grid-template-columns: 250px 1fr; gap: 14px; align-items: center;
  margin: 11px 0; font-size: 14.5px; color: var(--ink-2);
}
.calc input[type=number], .calc input[type=date] {
  width: 100%; max-width: 260px; padding: 9px 12px; border: 1px solid var(--line-2);
  border-radius: var(--r-sm); font: inherit; font-family: var(--mono); font-size: 14px;
  text-align: right; color: var(--ink); background: var(--surface);
}
.calc input[type=date] { text-align: left; }
.calc input:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.calc .reasons { display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px 24px; font-size: 14.5px; }
.calc .reasons label { display: flex; gap: 9px; align-items: baseline; cursor: pointer; padding: 3px 0; }
.calc .reasons label:hover { color: var(--brand); }
.calc .reasons small { color: var(--muted); font-family: var(--mono); font-size: 11.5px; }
.calc .group {
  grid-column: 1 / -1; font-weight: 700; color: var(--ink-3); margin-top: 12px;
  font-size: 12.5px; letter-spacing: .02em; text-transform: none;
}
.result {
  border: 1px solid var(--line); border-radius: var(--r-lg); padding: 24px 26px;
  background: var(--surface); box-shadow: var(--shadow-md);
}
.result .big {
  font-size: 34px; font-weight: 700; letter-spacing: -.03em; color: var(--ink);
  font-family: var(--mono); font-feature-settings: 'tnum';
}
.result .big small {
  font-size: 14px; color: var(--muted); font-weight: 500; margin-left: 10px;
  font-family: var(--sans); letter-spacing: 0;
}
tr.off td { color: var(--muted); text-decoration: line-through; }
tr.off td.why { text-decoration: none; color: var(--warning); font-size: 12.5px; }

/* ── 글 ─────────────────────────────────────────────────── */
article.post { max-width: 720px; padding: 56px 0 40px; }
article.post .meta { color: var(--muted); font-size: 13px; font-weight: 500; margin-bottom: 14px; }
article.post h1 { font-size: 34px; line-height: 1.32; letter-spacing: -.03em; color: var(--ink); margin-bottom: 26px; }
article.post h2 {
  font-size: 20px; margin: 40px 0 12px; color: var(--ink); letter-spacing: -.022em; font-weight: 700;
}
article.post p { font-size: 16.5px; margin-bottom: 16px; color: var(--ink-2); line-height: 1.8; }
article.post ol, article.post ul { margin: 0 0 16px 22px; }
article.post li { font-size: 16.5px; margin-bottom: 9px; color: var(--ink-2); line-height: 1.75; }
article.post b { font-weight: 600; color: var(--ink); }

/* ── 반응형 ─────────────────────────────────────────────── */
@media (max-width: 900px) {
  .kpis { grid-template-columns: repeat(2, 1fr); }
  .doors, .steps { grid-template-columns: 1fr; }
  .rule { grid-template-columns: 40px 1fr; }
  .rule p { grid-column: 2; }
  .item { grid-template-columns: 1fr; gap: 8px; }
}
@media (max-width: 640px) {
  .hero { padding: 56px 0 0; }
  .hero h1 { font-size: 34px; letter-spacing: -.035em; }
  .overlap { margin-top: 36px; margin-bottom: -100px; }
  .after-overlap { padding-top: 124px; }
  .proof { grid-template-columns: repeat(2, 1fr); }
  .proof div { border-left: 0; border-top: 1px solid var(--line); padding: 18px 0; }
  .proof div:first-child, .proof div:nth-child(2) { border-top: 0; }
  .proof .v { font-size: 24px; }
  .hero .lead { font-size: 17px; }
  .pagehead h1 { font-size: 30px; }
  .sechead h2 { font-size: 24px; }
  section { padding: 52px 0; }
  header.top .wrap { height: auto; padding: 12px 20px; flex-wrap: wrap; gap: 14px; }
  nav.main { margin-left: 0; gap: 16px; font-size: 14px; flex-wrap: wrap; align-items: center; align-self: auto; }
  nav.main a { padding: 4px 0; }
  nav.main a.on::after { display: none; }
  .calc .reasons, .calc label.row { grid-template-columns: 1fr; }
  /* 10자리 원화 금액이 고정폭으로 들어가야 한다 — 잘리면 회계 자료로 안 보인다 */
  .kpi .v { font-size: 16px; letter-spacing: -.03em; }
  .kpi .u { font-size: 11.5px; }
  .kpi { padding: 12px 13px; }
  .kpis { gap: 10px; }
  .shot .body { padding: 18px 16px 22px; }
  .shot .cap, .shot .bar { padding-left: 16px; padding-right: 16px; }
  .callout { padding: 28px 24px; }
  .result .big { font-size: 26px; }
}