/* ============================================================
   main.css — novista1.com 메인 페이지 6 영역 와이어프레임
   디자인: manus 정합 라이트 미니멀 (베이지 베이스 + Instrument Serif italic 헤드라인)
   갱신: 2026-05-12 Phase 2 [2.5] 디자인 차용
   BEM 접두사: nv-
   외부 표준: Modern Minimalism with serif headline + sans body (manus.im 정합)
   ============================================================ */

:root {
  --page-bg:        #F7F6F2;
  --page-card:      #FFFFFF;
  --page-dark:      #0A0A0A;
  --page-ink:       #0A0A0A;
  --page-ink-soft:  #5C5C58;
  --page-ink-faint: #9C9C96;
  --page-ink-inv:   #F7F6F2;
  --page-rule:      #E5E3DC;

  --page-serif: 'Instrument Serif', 'Pretendard Variable', 'Pretendard', serif;
  --page-sans:  'Pretendard Variable', 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  --page-mono:  'SF Mono', ui-monospace, 'JetBrains Mono', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-font-smoothing: antialiased; }
html { scrollbar-gutter: stable; scroll-behavior: smooth; }

.nv-body {
  font-family: var(--page-sans);
  background: var(--page-bg);
  color: var(--page-ink);
  min-height: 100dvh;
  line-height: 1.55;
  letter-spacing: -0.01em;
  font-weight: 400;
}

.nv-body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.02;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.nv-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--page-ink);
  color: var(--page-ink-inv);
  padding: 10px 18px;
  z-index: 9999;
  font-size: 13px;
  border-radius: 100px;
}
.nv-skip:focus { left: 16px; top: 16px; }

/* ── 헤더 ── */
.nv-header {
  position: sticky;
  top: 0;
  background: rgba(247, 246, 242, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  z-index: 100;
  transition: border-color 0.3s;
}
.nv-header:hover,
.nv-body.is-scrolled .nv-header { border-bottom-color: var(--page-rule); }

.nv-header__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 22px 32px;
  display: flex;
  align-items: center;
  gap: 32px;
  position: relative;
  z-index: 2;
}
.nv-brand {
  font-family: var(--page-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--page-ink);
  text-decoration: none;
}
.nv-brand span { color: var(--page-ink); }

.nv-nav {
  display: flex;
  gap: 28px;
  margin-left: 16px;
  flex: 1;
  flex-wrap: wrap;
}
.nv-nav a {
  color: var(--page-ink-soft);
  text-decoration: none;
  font-size: 13px;
  font-weight: 400;
  transition: color 0.2s;
}
.nv-nav a:hover { color: var(--page-ink); }

.nv-header__cta { display: flex; gap: 10px; align-items: center; }
.nv-btn {
  padding: 9px 18px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 400;
  text-decoration: none;
  transition: all 0.2s;
  border: 1px solid transparent;
  font-family: var(--page-sans);
}
.nv-btn--ghost {
  color: var(--page-ink-soft);
  border-color: var(--page-rule);
}
.nv-btn--ghost:hover { border-color: var(--page-ink); color: var(--page-ink); }
.nv-btn--primary {
  background: var(--page-ink);
  color: var(--page-ink-inv);
}
.nv-btn--primary:hover { opacity: 0.85; }

/* ── main ── */
.nv-main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 2;
}

/* ── hero ── */
.nv-hero {
  padding: 140px 0 100px;
  max-width: 1100px;
}
.nv-hero__eyebrow {
  font-family: var(--page-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--page-ink-faint);
  text-transform: uppercase;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
}
.nv-hero__eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--page-ink);
}
.nv-hero__title {
  font-family: var(--page-serif);
  font-size: clamp(40px, 7vw, 88px);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--page-ink);
  margin-bottom: 36px;
  word-break: keep-all;
}
.nv-hero__title em { font-style: italic; }
.nv-hero__sub {
  font-family: var(--page-sans);
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 400;
  color: var(--page-ink-soft);
  line-height: 1.6;
  max-width: 620px;
  word-break: keep-all;
}
.nv-hero__sub strong { color: var(--page-ink); font-weight: 500; }

/* ── 6 section 공통 ── */
.nv-section {
  padding: 96px 0;
  border-top: 1px solid var(--page-rule);
}
.nv-section__head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 24px;
  flex-wrap: wrap;
}
.nv-section__head h2 {
  font-family: var(--page-serif);
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.025em;
  color: var(--page-ink);
}
.nv-section__sub {
  font-family: var(--page-sans);
  font-size: 16px;
  font-weight: 400;
  color: var(--page-ink-soft);
  margin-bottom: 40px;
  max-width: 640px;
  line-height: 1.6;
  word-break: keep-all;
}
.nv-link {
  font-family: var(--page-sans);
  font-size: 13.5px;
  color: var(--page-ink);
  text-decoration: none;
  transition: gap 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.nv-link:hover { gap: 14px; }

/* ── grid + card ── */
.nv-grid {
  display: grid;
  gap: 16px;
}
.nv-grid--popular,
.nv-grid--revenue,
.nv-grid--market { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.nv-grid--subscription,
.nv-grid--education { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }
.nv-grid--apps { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }

.nv-card {
  padding: 28px 24px;
  background: var(--page-card);
  border: 1px solid var(--page-rule);
  border-radius: 4px;
  transition: border-color 0.25s, transform 0.25s;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.nv-card:hover {
  border-color: var(--page-ink);
  transform: translateY(-2px);
}
.nv-card__label {
  display: inline-block;
  font-family: var(--page-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--page-ink-faint);
  margin-bottom: 6px;
  padding: 3px 8px;
  background: rgba(10, 10, 10, 0.06);
  border-radius: 3px;
  align-self: flex-start;
  font-weight: 500;
}
.nv-card__title {
  font-family: var(--page-serif);
  font-size: 22px;
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.015em;
  color: var(--page-ink);
  line-height: 1.2;
  word-break: keep-all;
}
.nv-card__meta {
  font-family: var(--page-sans);
  font-size: 13.5px;
  color: var(--page-ink-soft);
  line-height: 1.55;
  word-break: keep-all;
}
.nv-card--placeholder {
  background: transparent;
  border-style: dashed;
  border-color: var(--page-rule);
}
.nv-card--placeholder .nv-card__title { color: var(--page-ink-faint); }
.nv-card--app {
  background: var(--page-card);
  min-height: 140px;
  justify-content: space-between;
}
.nv-card--app .nv-card__title {
  font-family: var(--page-mono);
  font-style: normal;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--page-ink);
}
.nv-card--app .nv-card__meta {
  font-family: var(--page-serif);
  font-style: italic;
  font-size: 19px;
  color: var(--page-ink);
  letter-spacing: -0.015em;
  line-height: 1.25;
}

/* ── footer ── */
.nv-footer {
  margin-top: 80px;
  padding: 48px 32px;
  border-top: 1px solid var(--page-rule);
  position: relative;
  z-index: 2;
}
.nv-footer__inner {
  max-width: 1280px;
  margin: 0 auto;
  font-family: var(--page-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--page-ink-faint);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.nv-footer__inner a { color: var(--page-ink-soft); text-decoration: none; }
.nv-footer__inner a:hover { color: var(--page-ink); }
.nv-footer__inner p { margin: 0; }

/* ── 모바일 ── */
@media (max-width: 860px) {
  .nv-header__inner { flex-wrap: wrap; gap: 14px; padding: 16px 20px; }
  .nv-nav { order: 3; flex-basis: 100%; margin-left: 0; gap: 18px; font-size: 12.5px; }
  .nv-main { padding: 0 20px; }
  .nv-hero { padding: 88px 0 64px; }
  .nv-section { padding: 64px 0; }
  .nv-footer { padding: 32px 20px; flex-direction: column; gap: 10px; }
  .nv-footer__inner { flex-direction: column; gap: 10px; }
}