/* 제품 소개 사이트(#739) — 프론트엔드 앱과 독립된 정적 스타일.
   색·폰트 토큰은 frontend/src/theme.css와 같은 값을 쓰되, 앱 CSS를 import하지 않는다
   (마케팅 페이지가 앱 빌드에 의존하지 않아야 한다). 토큰 값을 바꿀 때는 두 곳을 함께 본다. */
@import url('https://fonts.googleapis.com/css2?family=Hanken+Grotesk:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&family=Kaisei+Decol:wght@500;700&display=swap');
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.css');

:root {
  --ember: #C15433;
  --ember-700: #9A3F23;
  --ember-100: #F5CDBC;
  --ink: #1A1714;
  --ink-2: #3B3530;
  --ink-3: #6B635D;
  --rule: #E6DFD6;
  --rule-strong: #D2C9BD;
  --paper: #FAF7F2;
  --paper-2: #F2EDE4;
  --canvas: #FFFFFF;
  --void: #15110E;
  --void-2: #221C18;
  --void-ink-2: #BCB3AB;
  --void-ink-3: #7C726A;
  --horizon: #2C5C8A;
  --moss: #2E7D5B;
  --font-sans: "Hanken Grotesk", "Pretendard", ui-sans-serif, system-ui, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  --font-brand: "Kaisei Decol", ui-serif, Georgia, serif;
  --shadow-1: 0 1px 0 rgba(26,23,20,0.04), 0 1px 2px rgba(26,23,20,0.06);
  --shadow-2: 0 1px 0 rgba(26,23,20,0.04), 0 4px 12px rgba(26,23,20,0.08);
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }
::selection { background: var(--ember-100); }

a { color: var(--horizon); text-underline-offset: 2px; }
a:hover { color: var(--ember-700); }

:focus-visible {
  outline: 2px solid var(--ember);
  outline-offset: 2px;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 12px;
  top: 12px;
  z-index: 20;
  background: var(--canvas);
  padding: 10px 14px;
  border-radius: 8px;
  box-shadow: var(--shadow-2);
}

/* ── 버튼 ───────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn-primary {
  background: var(--ember);
  color: var(--paper);
}
.btn-primary:hover { background: var(--ember-700); color: var(--paper); }
.btn-primary:disabled { background: var(--ink-3); cursor: not-allowed; }
.btn-ghost {
  border-color: rgba(250, 247, 242, 0.28);
  color: var(--paper);
}
.btn-ghost:hover {
  border-color: var(--paper);
  color: var(--paper);
  background: rgba(250, 247, 242, 0.07);
}
.btn-sm { padding: 9px 16px; font-size: 14px; }
.btn-block { width: 100%; }

/* ── 네비게이션 ─────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(21, 17, 14, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(250, 247, 242, 0.08);
}
.nav-in {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.brand-tag {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--void-ink-3);
  border: 1px solid rgba(250, 247, 242, 0.14);
  border-radius: 999px;
  padding: 3px 7px;
}
.nav-links {
  display: flex;
  gap: 22px;
  margin-left: auto;
}
.nav-links a {
  color: var(--void-ink-2);
  font-size: 14.5px;
  text-decoration: none;
}
.nav-links a:hover { color: var(--paper); }
.site-login-link {
  color: var(--void-ink-2);
  font-size: 14.5px;
  text-decoration: none;
}
.site-login-link:hover { color: var(--paper); }

/* ── 히어로 ─────────────────────────────────────── */
.hero {
  background: var(--void);
  color: var(--paper);
  border-bottom: 1px solid rgba(250, 247, 242, 0.08);
}
.hero-in {
  padding: 96px 24px 104px;
  max-width: 860px;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ember);
  margin: 0 0 22px;
  text-transform: uppercase;
}
.hero h1 {
  font-family: var(--font-brand);
  font-size: clamp(34px, 5.4vw, 60px);
  line-height: 1.22;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 26px;
}
.lede {
  font-size: clamp(16.5px, 1.9vw, 19px);
  color: var(--void-ink-2);
  margin: 0 0 34px;
  max-width: 620px;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero-note {
  margin: 28px 0 0;
  font-size: 14px;
  color: var(--void-ink-3);
  padding-left: 13px;
  border-left: 2px solid var(--ember);
}

/* ── 섹션 공통 ──────────────────────────────────── */
.section { padding: 88px 0; }
/* 상단 고정 네비(64px) 아래로 제목이 가려지지 않게 앵커 이동 지점을 내린다. */
section[id] { scroll-margin-top: 76px; }
.section-tint { background: var(--paper-2); }
.section-dark {
  background: var(--void);
  color: var(--paper);
}
.section-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ember);
  margin: 0 0 16px;
}
.section-title {
  font-family: var(--font-brand);
  font-size: clamp(25px, 3.4vw, 37px);
  line-height: 1.32;
  font-weight: 500;
  margin: 0 0 22px;
  letter-spacing: -0.005em;
}
.section-lede {
  font-size: 17px;
  color: var(--ink-2);
  max-width: 660px;
  margin: 0 0 46px;
}
.section-dark .section-lede { color: var(--void-ink-2); }

/* ── 문제 카드 ──────────────────────────────────── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 44px;
}
.card {
  background: var(--canvas);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 28px 26px 26px;
  box-shadow: var(--shadow-1);
}
.card-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ember);
  letter-spacing: 0.08em;
}
.card h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 12px 0 10px;
  line-height: 1.4;
}
.card p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-3);
}

/* ── 흐름 다이어그램 ────────────────────────────── */
.flow { margin: 0; }
.flow svg {
  width: 100%;
  height: auto;
  /* 좁은 화면에서 viewBox가 그대로 축소되면 라벨 글자가 6~7px까지 줄어 읽을 수 없다 —
     최소 폭을 두고 .flow-scroll이 가로 스크롤을 맡는다. */
  min-width: 620px;
}
.fl-cap {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  fill: var(--void-ink-3);
  text-transform: uppercase;
}
.fl-box rect {
  fill: rgba(250, 247, 242, 0.045);
  stroke: rgba(250, 247, 242, 0.16);
}
.fl-box-out rect {
  fill: rgba(193, 84, 51, 0.13);
  stroke: rgba(193, 84, 51, 0.5);
}
.fl-label text {
  font-family: var(--font-sans);
  font-size: 13px;
  fill: var(--paper);
}
.fl-arrow path {
  stroke: rgba(250, 247, 242, 0.3);
  stroke-width: 1.5;
  stroke-dasharray: 4 4;
  fill: none;
}
.fl-core rect {
  fill: var(--ember);
  stroke: none;
}
.fl-core text {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  fill: var(--paper);
  text-anchor: middle;
}
.fl-core text.fl-core-sub {
  font-size: 12px;
  font-weight: 500;
  fill: rgba(250, 247, 242, 0.82);
  font-family: var(--font-mono);
}
.flow figcaption {
  margin-top: 22px;
  font-size: 14px;
  color: var(--void-ink-3);
}
.flow-scroll {
  overflow-x: auto;
  padding-bottom: 6px;
}

/* ── 표준 커버리지 ──────────────────────────────── */
.std-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.std {
  background: var(--canvas);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 26px 24px;
  box-shadow: var(--shadow-1);
}
.std header {
  border-bottom: 1px solid var(--rule);
  padding-bottom: 16px;
  margin-bottom: 18px;
}
.std-code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--ember);
}
.std h3 {
  font-size: 21px;
  margin: 6px 0 0;
  font-weight: 700;
}
.std ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.std li {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 10px;
  align-items: baseline;
  font-size: 15px;
  color: var(--ink-2);
}
.clause {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-3);
  background: var(--paper-2);
  border-radius: 5px;
  padding: 3px 6px;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.disclaimer {
  margin: 34px 0 0;
  padding: 20px 22px;
  background: var(--paper-2);
  border-left: 3px solid var(--rule-strong);
  border-radius: 0 10px 10px 0;
  font-size: 14.5px;
  color: var(--ink-3);
  max-width: 760px;
}

/* ── 증적 ───────────────────────────────────────── */
.ev-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 44px;
}
.ev {
  background: var(--canvas);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 26px 24px;
}
.ev h3 {
  font-size: 17.5px;
  margin: 0 0 10px;
  font-weight: 700;
  padding-left: 13px;
  border-left: 3px solid var(--moss);
}
.ev p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-3);
}

/* ── 도입 단계 ──────────────────────────────────── */
.steps {
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
}
.steps li {
  border-top: 2px solid var(--rule-strong);
  padding-top: 22px;
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--ember);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
}
.steps h3 {
  font-size: 18px;
  margin: 15px 0 9px;
  font-weight: 700;
}
.steps p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-3);
}

/* ── 문의 ───────────────────────────────────────── */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.contact-copy .section-title { margin-bottom: 18px; }
.contact-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.contact-points li {
  font-size: 14.5px;
  color: var(--void-ink-2);
  padding-left: 18px;
  position: relative;
}
.contact-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--ember);
}
.contact-form {
  background: var(--void-2);
  border: 1px solid rgba(250, 247, 242, 0.1);
  border-radius: 16px;
  padding: 30px 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.field label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--paper);
}
.field label span[aria-hidden] { color: var(--ember); }
.field .opt {
  font-weight: 400;
  font-size: 12px;
  color: var(--void-ink-3);
}
.field input,
.field textarea {
  font-family: inherit;
  font-size: 15px;
  color: var(--paper);
  background: rgba(250, 247, 242, 0.05);
  border: 1px solid rgba(250, 247, 242, 0.16);
  border-radius: 9px;
  padding: 11px 13px;
  width: 100%;
  resize: vertical;
}
.field input:focus,
.field textarea:focus {
  border-color: var(--ember);
  background: rgba(250, 247, 242, 0.08);
}
.field input[aria-invalid="true"],
.field textarea[aria-invalid="true"] {
  border-color: var(--ember);
}
.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.form-status {
  margin: 0;
  font-size: 14px;
  min-height: 20px;
  color: var(--void-ink-2);
}
.form-status.ok { color: #7FC0A0; }
.form-status.err { color: #E9A08C; }
.form-privacy {
  margin: 0;
  font-size: 12.5px;
  color: var(--void-ink-3);
  line-height: 1.5;
}

/* ── 푸터 ───────────────────────────────────────── */
.foot {
  background: var(--void);
  border-top: 1px solid rgba(250, 247, 242, 0.09);
  padding: 34px 0;
}
.foot-in {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.foot p {
  margin: 0;
  font-size: 13.5px;
  color: var(--void-ink-3);
}
.foot a {
  margin-left: auto;
  font-size: 13.5px;
  color: var(--void-ink-2);
  text-decoration: none;
}
.foot a:hover { color: var(--paper); }
/* 약관·개인정보처리방침 링크(#1205) — 첫 링크만 오른쪽으로 밀고 나머지는 붙여 배치 */
.foot a ~ a { margin-left: 0; }

/* ── 반응형 ─────────────────────────────────────── */
@media (max-width: 860px) {
  .contact-wrap { grid-template-columns: 1fr; gap: 36px; }
  .nav-links { display: none; }
  .nav-in { gap: 12px; }
  .brand-tag { display: none; }
  .nav-links { margin-left: 0; }
  .btn-sm { margin-left: auto; }
  .hero-in { padding: 68px 24px 76px; }
  .section { padding: 64px 0; }
}

@media (max-width: 560px) {
  body { font-size: 15.5px; }
  .wrap { padding: 0 18px; }
  .card, .std, .ev, .contact-form { padding: 22px 20px; }
  .std li { grid-template-columns: 66px 1fr; }
  .cta-row .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}