/* ============================================================
   bans.co.kr — 공통 스타일시트
   브랜드 색·타이포·컴포넌트 단일 소스 (디자인설계서 §1~§3 반영)
   색은 로고 PNG 실측값: Navy #1D2756 · Amber #FAB82B
   ============================================================ */

:root {
  --navy:       #1D2756; /* Ink Navy: 헤더/푸터 배경, 제목, 강한 텍스트 */
  --amber:      #FAB82B; /* Amber: 주 CTA, 강조 라벨, 포인트 보더, 링크 호버 */
  --amber-text: #3A2606; /* 앰버 배경 위 텍스트(짙은 브라운) */
  --ivory:      #F7F5F0; /* 히어로/섹션 교차 배경 */
  --white:      #FFFFFF; /* 기본 페이지/카드 배경 */
  --body:       #454B5E; /* 본문 텍스트 */
  --muted:      #8B97B4; /* 보조 텍스트 */
  --nav-muted:  #C6CEE0; /* 네이비 헤더 메뉴 텍스트 */
  --footer-notice: #8FA3C4; /* 푸터 고지 바 텍스트 */
  --border:     #E5E8F0; /* 헤어라인 구분선 */

  --maxw: 1080px;
  --docw: 720px;
  --radius-card: 12px;
  --radius-btn: 8px;
}

/* ---------- 리셋 ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: 'Pretendard', 'Noto Sans KR', -apple-system, BlinkMacSystemFont,
               'Segoe UI', 'Malgun Gothic', 'Apple SD Gothic Neo', sans-serif;
  font-weight: 400;
  font-size: 17px;
  line-height: 1.7;
  color: var(--body);
  background: var(--white);
}
img { max-width: 100%; display: block; }
a { color: var(--navy); text-decoration: none; }
a:hover { color: var(--amber); }
h1, h2, h3 { font-weight: 500; color: var(--navy); line-height: 1.35; margin: 0 0 .5em; }
h1 { font-size: 30px; }
h2 { font-size: 22px; }
h3 { font-size: 17px; }
p  { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.3em; }
li { margin-bottom: .35em; }
.caption { font-size: 13px; color: var(--muted); }

/* ---------- 레이아웃 ---------- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
section { padding: 56px 0; }
.section-ivory { background: var(--ivory); }
.section-tight { padding: 40px 0; }
.lead { font-size: 18px; color: var(--body); max-width: 640px; }
.center { text-align: center; }

/* ---------- 헤더 ---------- */
.site-header {
  background: var(--navy);
  position: sticky; top: 0; z-index: 50;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 56px; gap: 16px;
}
.brand { display: flex; align-items: center; }
.brand .logo { height: 28px; width: auto; }
.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav a { color: var(--nav-muted); font-size: 16px; }
.site-nav a:hover, .site-nav a.active { color: var(--white); }
.nav-soon { color: #6E7BA0; font-size: 16px; }
.nav-soon em { font-style: normal; font-size: 12px; color: #6E7BA0; }
.nav-cta { margin-left: 4px; }

/* 모바일 메뉴 토글 (CSS 체크박스 핵 — JS 불필요) */
.nav-toggle { display: none; }
.nav-burger { display: none; cursor: pointer; padding: 8px; }
.nav-burger span {
  display: block; width: 24px; height: 2px; background: var(--white);
  margin: 5px 0; border-radius: 2px;
}

/* ---------- 버튼 ---------- */
.btn {
  display: inline-block; font-size: 16px; font-weight: 500;
  padding: 12px 22px; border-radius: var(--radius-btn);
  border: 1px solid transparent; cursor: pointer;
  min-height: 44px; line-height: 1.25;
  transition: background-color .15s ease, color .15s ease;
}
.btn-amber { background: var(--amber); color: var(--amber-text); }
.btn-amber:hover { background: #E9A821; color: var(--amber-text); }
.btn-outline { background: transparent; border-color: var(--navy); color: var(--navy); }
.btn-outline:hover { background: var(--navy); color: var(--white); }
.btn-pill { border-radius: 999px; padding: 9px 20px; min-height: 0; }
.btn-lg { font-size: 17px; padding: 14px 28px; }
.btn-group { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- 히어로 ---------- */
.hero { background: var(--ivory); text-align: center; padding: 72px 0; }
.hero-logo { height: 40px; margin: 0 auto 22px; }
.hero .eyebrow {
  display: inline-block; color: #B07E12; background: transparent;
  font-size: 13px; font-weight: 500; letter-spacing: .18em;
  text-transform: uppercase; margin-bottom: 16px;
}
.hero h1 { font-size: 30px; margin-bottom: 18px; }
.hero .subcopy { color: var(--body); max-width: 420px; margin: 0 auto 28px; }
.hero .btn-group { justify-content: center; }
.hero-small { padding: 52px 0; }

/* ---------- 3분할 특징 스트립 ---------- */
.feature-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.strip-card {
  background: var(--white); border: 1px solid var(--border);
  border-top: 3px solid var(--navy); border-radius: var(--radius-card);
  padding: 26px 22px;
}
.strip-card:nth-child(2) { border-top-color: var(--amber); }
.strip-card h3 { margin-bottom: 8px; }
.strip-card p { margin: 0; }

/* ---------- 제품 카드 2열 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.product-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-card); padding: 30px 28px;
}
.product-card h2 { font-size: 20px; }
.product-card .btn { margin-top: 8px; }

/* ---------- 기능 상세 블록 (교차) ---------- */
.feature-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
  align-items: center; margin-bottom: 48px;
}
.feature-row:last-child { margin-bottom: 0; }
.feature-row.reverse .feature-media { order: 2; }
.feature-row.reverse .feature-text  { order: 1; }
.feature-text h2 { font-size: 20px; }

/* 스크린샷 placeholder */
.shot {
  background: #EEF0F5; border: 1px solid var(--border);
  border-radius: var(--radius-card);
  aspect-ratio: 16 / 10; width: 100%;
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 14px; text-align: center; padding: 16px;
}

/* ---------- 프로세스 스텝 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.step { text-align: center; }
.step .num {
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--navy); color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 500; margin: 0 auto 14px;
}
.step h3 { margin-bottom: 6px; }
.step p { margin: 0; font-size: 15px; }

/* ---------- 2열 카드(타겟 고객 등) ---------- */
.two-col { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.info-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-card); padding: 26px 24px;
}
.info-card h3 { margin-bottom: 8px; }

/* 강조 카드(개인정보 원칙 등) */
.note-card {
  background: var(--ivory); border: 1px solid var(--border);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius-card); padding: 24px 26px;
}
.note-card h3 { margin-bottom: 10px; }

/* ---------- 비교표 ---------- */
.compare-wrap { overflow-x: auto; }
.compare {
  width: 100%; border-collapse: collapse; min-width: 560px;
  border: 1px solid var(--border); border-radius: var(--radius-card);
  overflow: hidden;
}
.compare th, .compare td {
  padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--border);
}
.compare thead th { background: var(--navy); color: var(--white); font-weight: 500; }
.compare tbody th { font-weight: 500; color: var(--navy); background: var(--ivory); width: 34%; }
.compare .yes { color: #1E7A46; font-weight: 500; }
.compare .no  { color: var(--muted); }
.compare tr:last-child th, .compare tr:last-child td { border-bottom: none; }

/* 시스템 요구사항 목록 */
.req-list { background: var(--ivory); border: 1px solid var(--border);
  border-radius: var(--radius-card); padding: 22px 26px; }

/* ---------- FAQ 아코디언 ---------- */
.faq details {
  border: 1px solid var(--border); border-radius: var(--radius-card);
  padding: 4px 20px; margin-bottom: 12px; background: var(--white);
}
.faq summary {
  cursor: pointer; list-style: none; padding: 14px 0;
  font-size: 17px; font-weight: 500; color: var(--navy);
  display: flex; justify-content: space-between; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '＋'; color: var(--amber); font-size: 20px; margin-left: 12px; }
.faq details[open] summary::after { content: '－'; }
.faq details[open] summary { border-bottom: 1px solid var(--border); }
.faq .answer { padding: 14px 0 6px; }
.faq .answer p:last-child { margin-bottom: 0; }

/* ---------- CTA 밴드 ---------- */
.cta-band { background: var(--navy); text-align: center; padding: 56px 0; }
.cta-band h2 { color: var(--white); font-size: 24px; }
.cta-band p { color: var(--nav-muted); max-width: 520px; margin: 0 auto 24px; }

/* ---------- 신뢰 고지 ---------- */
.trust { text-align: center; }
.trust p { max-width: 640px; margin: 0 auto; color: var(--body); }

/* ---------- 문서형 본문 ---------- */
.doc { max-width: var(--docw); margin: 0 auto; }
.doc h1 { margin-bottom: 8px; }
.doc .updated { color: var(--muted); font-size: 14px; margin-bottom: 28px; }
.doc h2 { font-size: 20px; margin-top: 36px; }
.doc h3 { margin-top: 24px; }

/* 페이지 제목 헤더 */
.page-head { background: var(--ivory); text-align: center; padding: 52px 0; }
.page-head h1 { margin-bottom: 10px; }
.page-head p { max-width: 620px; margin: 0 auto; color: var(--body); }

/* ---------- 푸터 ---------- */
.site-footer { background: var(--navy); color: var(--nav-muted); margin-top: 8px; }
.footer-notice {
  border-bottom: 1px solid rgba(255,255,255,.08);
  color: var(--footer-notice); font-size: 14px; text-align: center; padding: 14px 0;
}
.footer-inner {
  display: flex; flex-wrap: wrap; align-items: center; gap: 16px;
  padding-top: 26px; padding-bottom: 26px;
}
.footer-logo { height: 24px; width: auto; }
.footer-links { display: flex; gap: 20px; flex: 1; flex-wrap: wrap; }
.footer-links a { color: var(--nav-muted); font-size: 15px; }
.footer-links a:hover { color: var(--white); }
.copyright { margin: 0; color: var(--muted); font-size: 14px; }

/* ---------- 반응형 ---------- */
@media (max-width: 900px) {
  .feature-strip { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  h1, .hero h1 { font-size: 26px; }
  section { padding: 44px 0; }

  /* 모바일 내비: 세로 펼침 */
  .nav-burger { display: block; }
  .site-nav {
    position: absolute; top: 56px; left: 0; right: 0;
    background: var(--navy); flex-direction: column; align-items: stretch;
    gap: 0; padding: 8px 0; display: none;
    border-top: 1px solid rgba(255,255,255,.08);
  }
  .nav-toggle:checked ~ .site-nav { display: flex; }
  .site-nav a, .nav-soon { padding: 12px 20px; }
  .nav-cta { margin: 8px 20px; text-align: center; }

  .product-grid, .two-col, .feature-row { grid-template-columns: 1fr; }
  .feature-row { gap: 20px; margin-bottom: 36px; }
  .feature-row.reverse .feature-media { order: 1; }
  .feature-row.reverse .feature-text  { order: 2; }
}
@media (max-width: 520px) {
  .steps { grid-template-columns: 1fr; }
}

/* 실제 스크린샷 이미지 (placeholder .shot 의 이미지판) */
.shot-img{display:block;width:100%;height:auto;border:1px solid var(--border);border-radius:12px}