/* ============================================================
   needforai landing — 흰/검 미니멀
   ============================================================ */
:root {
  --bg: #FFFFFF;
  --bg-soft: #F6F6F6;
  --panel: #FFFFFF;
  --ink: #111111;
  --ink-soft: #333333;
  --muted: #767676;
  --border: #E6E6E6;
  --accent: #111111;
  --accent-hover: #000000;
  --accent-soft: #F0F0F0;
  --radius: 14px;
  --serif: 'Pretendard Variable', Pretendard, -apple-system, 'Noto Sans KR', sans-serif;
  --sans: 'Pretendard Variable', Pretendard, -apple-system, 'Noto Sans KR', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
a { color: inherit; text-decoration: none; }

/* ---------- 버튼 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--sans); font-size: 14.5px; font-weight: 600;
  padding: 9px 18px; border-radius: 10px; border: 1px solid transparent;
  cursor: pointer; transition: all .15s ease; white-space: nowrap;
}
.btn-lg { padding: 13px 26px; font-size: 16px; border-radius: 12px; }
.btn-block { width: 100%; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-primary .arrow { transition: transform .15s; }
.btn-primary:hover .arrow { transform: translateX(3px); }
.btn-outline { background: transparent; color: var(--ink-soft); border-color: var(--border); }
.btn-outline:hover { border-color: var(--ink-soft); background: var(--bg-soft); }
.btn-ghost { background: transparent; color: var(--ink-soft); }
.btn-ghost:hover { background: var(--bg-soft); }
.btn-google { background: #fff; color: var(--ink); border-color: var(--border); font-size: 15px; padding: 12px; }
.btn-google:hover { background: var(--bg-soft); }

/* ---------- 헤더 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .85); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 32px; height: 64px; }
.logo { font-size: 20px; font-weight: 800; letter-spacing: -.03em; display: inline-flex; align-items: center; gap: 8px; }
.logo-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; border-radius: 8px;
  background: var(--ink); color: #fff; font-size: 14px; font-weight: 800;
}
.logo-mark-lg { width: 44px; height: 44px; border-radius: 12px; font-size: 22px; }
.logo-tld { color: var(--muted); font-size: 14px; font-weight: 400; }
.header-nav { display: flex; gap: 22px; font-size: 14.5px; color: var(--muted); }
.header-nav a:hover { color: var(--ink); }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.user-chip { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; padding: 4px 10px 4px 4px; border: 1px solid var(--border); border-radius: 99px; background: #fff; }
.user-chip img { width: 26px; height: 26px; border-radius: 50%; }

/* ---------- 히어로 ---------- */
.hero { text-align: center; padding: 88px 0 64px; }
.hero-badge {
  display: inline-block; font-size: 13.5px; font-weight: 600; color: var(--accent);
  background: var(--accent-soft); padding: 6px 14px; border-radius: 99px; margin-bottom: 22px;
}
.hero-title {
  font-size: clamp(34px, 6vw, 58px);
  font-weight: 800; line-height: 1.22; letter-spacing: -.035em; color: var(--ink);
}
.hero-title em { font-style: normal; background: var(--bg-soft); padding: 0 10px; border-radius: 10px; }
.hero-sub { font-size: 18px; color: var(--muted); margin: 22px auto 34px; max-width: 560px; }
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.g-icon { flex-shrink: 0; }

/* ---------- 앱 미리보기 목업 ---------- */
.hero-preview { margin-top: 64px; perspective: 1200px; }
.preview-window {
  max-width: 860px; margin: 0 auto; background: #fff;
  border: 1px solid var(--border); border-radius: 16px; overflow: hidden;
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, .12);
}
.preview-titlebar {
  display: flex; align-items: center; gap: 7px; padding: 12px 16px;
  background: var(--bg-soft); border-bottom: 1px solid var(--border);
}
.preview-titlebar i { width: 11px; height: 11px; border-radius: 50%; background: #DCDCDC; }
.preview-titlebar span { margin-left: 10px; font-size: 12.5px; color: var(--muted); }
.preview-body { display: flex; min-height: 330px; text-align: left; }
.preview-sidebar { width: 200px; background: var(--bg); border-right: 1px solid var(--border); padding: 16px 10px; }
.pv-logo { font-weight: 800; font-size: 15px; letter-spacing: -.02em; padding: 6px 10px 14px; }
.pv-item { font-size: 13.5px; color: var(--ink-soft); padding: 7px 10px; border-radius: 8px; margin-bottom: 2px; }
.pv-item i { width: 16px; text-align: center; font-size: 12px; margin-right: 4px; }
.pv-item.active { background: var(--accent-soft); color: var(--ink); font-weight: 600; }
.pv-divider { height: 1px; background: var(--border); margin: 10px 6px; }
.preview-content { flex: 1; padding: 26px; }
.pv-line { height: 13px; background: var(--bg-soft); border-radius: 6px; margin-bottom: 14px; }
.pv-line.w60 { width: 60%; height: 20px; } .pv-line.w70 { width: 70%; }
.pv-line.w80 { width: 80%; } .pv-line.w90 { width: 90%; }
.pv-card-row { display: flex; gap: 14px; margin: 18px 0 22px; }
.pv-card { flex: 1; height: 74px; background: var(--bg); border: 1px solid var(--border); border-radius: 10px; }

/* ---------- 섹션 공통 ---------- */
.section-title { font-size: clamp(26px, 4vw, 36px); font-weight: 800; text-align: center; letter-spacing: -.03em; }
.section-sub { text-align: center; color: var(--muted); margin: 12px 0 44px; font-size: 16px; }

/* ---------- 기능 ---------- */
.features { padding: 90px 0; background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 24px; transition: transform .15s ease, box-shadow .15s ease;
}
.feature-card:hover { transform: translateY(-3px); box-shadow: 0 14px 30px -14px rgba(0, 0, 0, .1); }
.feature-icon { font-size: 24px; margin-bottom: 14px; color: var(--ink); }
.feature-card h3 { font-size: 17px; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--muted); }

/* ---------- 요금제 ---------- */
.pricing { padding: 90px 0; }
.pricing-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 380px)); gap: 20px; justify-content: center; }
.price-card { position: relative; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 28px; }
.price-card.featured { border-color: var(--ink); box-shadow: 0 18px 40px -18px rgba(0, 0, 0, .15); }
.price-flag {
  position: absolute; top: -12px; right: 22px; background: var(--accent); color: #fff;
  font-size: 12px; font-weight: 700; padding: 3px 12px; border-radius: 99px;
}
.price-card h3 { font-size: 18px; }
.price { margin: 12px 0 20px; color: var(--muted); }
.price strong { font-size: 36px; font-weight: 800; color: var(--ink); letter-spacing: -.03em; }
.price-card ul { list-style: none; margin-bottom: 26px; }
.price-card li { font-size: 14.5px; color: var(--ink-soft); padding: 5px 0; }
.pricing-notice { text-align: center; font-size: 13px; color: var(--muted); margin-top: 22px; }
.pricing-notice a { text-decoration: underline; color: var(--ink-soft); }
.modal-terms a { text-decoration: underline; color: var(--ink-soft); }

/* ---------- FAQ ---------- */
.faq { padding: 20px 0 90px; }
.faq .container { max-width: 720px; }
.faq details { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 18px 22px; margin-bottom: 10px; }
.faq summary { font-weight: 600; font-size: 15.5px; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; float: right; color: var(--muted); }
.faq details[open] summary::after { content: '−'; }
.faq details p { margin-top: 12px; font-size: 14.5px; color: var(--muted); }

/* ---------- 푸터 ---------- */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-soft); padding: 40px 0 32px; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 20px; }
.footer-copy { font-size: 13px; color: var(--muted); margin-top: 18px; }
.footer-nav { display: flex; gap: 20px; font-size: 14px; color: var(--muted); flex-wrap: wrap; }
.footer-nav a:hover { color: var(--ink); }
.footer-nav a strong { color: var(--ink-soft); }
.footer-biz {
  margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--border);
  font-size: 12.5px; line-height: 1.9; color: var(--muted);
}
.footer-biz strong { color: var(--ink-soft); font-weight: 600; }

/* ---------- 약관/정책 페이지 ---------- */
.legal { max-width: 760px; margin: 0 auto; padding: 48px 24px 90px; }
.legal h1 { font-size: 28px; font-weight: 800; letter-spacing: -.03em; margin-bottom: 6px; }
.legal-date { font-size: 13px; color: var(--muted); margin-bottom: 34px; }
.legal h2 { font-size: 16.5px; font-weight: 700; margin: 30px 0 10px; }
.legal p, .legal li { font-size: 14.5px; color: var(--ink-soft); line-height: 1.8; }
.legal p { margin-bottom: 10px; }
.legal ul, .legal ol { padding-left: 22px; margin: 8px 0 14px; }
.legal li { margin-bottom: 4px; }
.legal table { width: 100%; border-collapse: collapse; font-size: 13.5px; margin: 12px 0 18px; }
.legal th, .legal td { border: 1px solid var(--border); padding: 9px 12px; text-align: left; color: var(--ink-soft); }
.legal th { background: var(--bg-soft); font-weight: 700; }
.legal .placeholder { background: #FFF3CD; padding: 0 4px; border-radius: 4px; }

/* ---------- 모달 ---------- */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 100; background: rgba(31, 30, 29, .45);
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal {
  position: relative; background: var(--bg); border-radius: 18px;
  padding: 40px 34px 30px; width: 100%; max-width: 400px; text-align: center;
  box-shadow: 0 30px 70px -20px rgba(0, 0, 0, .4);
}
.modal-close {
  position: absolute; top: 14px; right: 18px; background: none; border: none;
  font-size: 26px; color: var(--muted); cursor: pointer;
}
.modal-logo { display: flex; justify-content: center; margin-bottom: 14px; }
.modal h3 { font-size: 21px; font-weight: 800; letter-spacing: -.02em; margin-bottom: 8px; }
.modal-sub { font-size: 14px; color: var(--muted); margin-bottom: 24px; }
.modal-terms { font-size: 12px; color: var(--muted); margin-top: 18px; }

/* ---------- 토스트 ---------- */
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
  background: var(--ink); color: #fff; font-size: 14px; padding: 12px 22px;
  border-radius: 10px; z-index: 200; box-shadow: 0 10px 30px rgba(0, 0, 0, .3);
}

/* ---------- 반응형 ---------- */
@media (max-width: 860px) {
  .header-nav { display: none; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .preview-sidebar { display: none; }
}
@media (max-width: 560px) {
  .feature-grid { grid-template-columns: 1fr; }
  .header-actions .btn-outline { display: none; }
}