/* ============================================================
   tridi. — landing styles
   디자인 토큰은 앱과 동일: paper / ink / 시간대 3색
   ============================================================ */

:root {
  --paper: #F4F2EE;
  --ink: #1A1A1A;
  --gray: #73716D;
  --line: rgba(0, 0, 0, 0.08);
  --card: #FFFFFF;

  --morning-a: #F9D9A8;
  --morning-b: #F0A868;
  --day-a: #BFE0FA;
  --day-b: #7FB8EE;
  --evening-a: #A9A3D6;
  --evening-b: #6C63AC;

  --font-kr: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", monospace;

  --max: 1080px;
  --r-card: 16px;
  --r-pill: 24px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-kr);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img { max-width: 100%; display: block; }

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

.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gray);
}

/* ── 헤더 ─────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(244, 242, 238, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.logo {
  display: inline-flex; align-items: center;
  text-decoration: none;
}
/* 워드마크 이미지 로고 — 잉크색 SVG(assets/wordmark.svg 복사본) */
.logo .wordmark-img { height: 22px; width: auto; display: block; }
.site-footer .logo .wordmark-img { height: 20px; }
.nav { display: flex; gap: 28px; }
.nav a {
  text-decoration: none; font-size: 14px; font-weight: 500; color: var(--gray);
  transition: color 0.15s;
}
.nav a:hover, .nav a:focus-visible { color: var(--ink); }

/* ── 히어로 ───────────────────────────── */
.hero .wrap {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 64px;
  align-items: center;
  padding-top: 96px;
  padding-bottom: 96px;
}
.hero h1 {
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.15;
}
.hero .sub {
  margin-top: 20px;
  font-size: 18px;
  color: var(--gray);
  max-width: 42ch;
}
.hero .define {
  margin-top: 28px;
  font-size: 14px;
  color: var(--gray);
  border-left: 2px solid var(--ink);
  padding-left: 14px;
  max-width: 52ch;
}
.store-row { margin-top: 36px; display: flex; gap: 12px; flex-wrap: wrap; }
.store-btn {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--ink); color: #fff;
  border-radius: var(--r-pill);
  padding: 13px 24px;
  font-size: 15px; font-weight: 700;
  text-decoration: none;
  transition: transform 0.15s ease, opacity 0.15s;
}
.store-btn:hover { transform: translateY(-1px); }
.store-btn.soon { background: transparent; color: var(--ink); border: 1px solid var(--line); cursor: default; }
.store-btn.soon:hover { transform: none; }
.store-btn .tag { font-family: var(--font-mono); font-size: 10px; opacity: 0.6; }

/* ── 시그니처: 3밴드 프레임 ─────────────── */
.tri-frame {
  aspect-ratio: 9 / 16;
  width: 100%;
  max-width: 340px;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.14);
  display: grid;
  grid-template-rows: 1fr 1fr 1fr;
  position: relative;
}
.band { position: relative; opacity: 0; animation: bandIn 0.7s ease forwards; }
.band.morning { background: linear-gradient(180deg, var(--morning-a), var(--morning-b)); animation-delay: 0.15s; }
.band.day     { background: linear-gradient(180deg, var(--day-a), var(--day-b)); animation-delay: 0.4s; }
.band.evening { background: linear-gradient(180deg, var(--evening-a), var(--evening-b)); animation-delay: 0.65s; }
@keyframes bandIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.band .ts {
  position: absolute; right: 14px; bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px; color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 0 6px rgba(0, 0, 0, 0.25);
}
.tri-frame .wm {
  position: absolute; left: 14px; bottom: 10px;
  font-family: var(--font-mono);
  font-size: 10px; color: rgba(255, 255, 255, 0.75);
  letter-spacing: 0.08em;
}

/* ── 섹션 공통 ─────────────────────────── */
section { padding: 88px 0; }
section + section { border-top: 1px solid var(--line); }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px; letter-spacing: 0.12em; color: var(--gray);
  margin-bottom: 16px;
}
h2 {
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 800; letter-spacing: -0.03em;
  line-height: 1.3;
}
.section-sub { margin-top: 12px; color: var(--gray); max-width: 56ch; }

/* 333 규칙 — 3열 */
.tri-grid {
  margin-top: 48px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.tri-card {
  background: var(--card);
  border-radius: var(--r-card);
  padding: 28px 24px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}
.tri-card .chip {
  width: 40px; height: 40px; border-radius: 12px; margin-bottom: 18px;
}
.tri-card.morning .chip { background: linear-gradient(160deg, var(--morning-a), var(--morning-b)); }
.tri-card.day .chip { background: linear-gradient(160deg, var(--day-a), var(--day-b)); }
.tri-card.evening .chip { background: linear-gradient(160deg, var(--evening-a), var(--evening-b)); }
.tri-card h3 { font-size: 17px; font-weight: 700; }
.tri-card .window { font-family: var(--font-mono); font-size: 11px; color: var(--gray); margin-top: 2px; }
.tri-card p { margin-top: 10px; font-size: 14px; color: var(--gray); }

/* 작동 방식 — 실제 시퀀스라 번호 사용 */
.steps { margin-top: 48px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step .num {
  font-family: var(--font-mono); font-size: 13px; color: var(--gray);
}
.step h3 { margin-top: 8px; font-size: 17px; font-weight: 700; }
.step p { margin-top: 8px; font-size: 14px; color: var(--gray); }

/* 프라이버시 문단 */
.privacy-strip {
  margin-top: 40px;
  background: var(--ink); color: var(--paper);
  border-radius: var(--r-card);
  padding: 36px 32px;
}
.privacy-strip h3 { font-size: 20px; font-weight: 800; letter-spacing: -0.02em; }
.privacy-strip p { margin-top: 10px; font-size: 14px; color: rgba(244, 242, 238, 0.75); max-width: 62ch; }
.privacy-strip .mono { color: rgba(244, 242, 238, 0.5); }

/* 가격 */
.price-grid { margin-top: 48px; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.price-card {
  background: var(--card); border-radius: var(--r-card);
  padding: 32px 28px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}
.price-card.plus { background: var(--ink); color: var(--paper); }
.price-card h3 { font-size: 17px; font-weight: 800; }
.price-card .amount { margin-top: 14px; font-size: 28px; font-weight: 800; letter-spacing: -0.02em; }
.price-card .amount span { font-size: 14px; font-weight: 500; color: var(--gray); }
.price-card.plus .amount span { color: rgba(244, 242, 238, 0.6); }
.price-card ul { margin-top: 18px; list-style: none; }
.price-card li { font-size: 14px; padding: 6px 0; color: var(--gray); }
.price-card.plus li { color: rgba(244, 242, 238, 0.8); }
.price-card li::before { content: "· "; }
.price-note { margin-top: 20px; font-size: 12px; color: var(--gray); }

/* FAQ */
.faq { margin-top: 40px; }
.faq details {
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}
.faq summary {
  cursor: pointer; font-weight: 700; font-size: 16px;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--font-mono); color: var(--gray); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: 12px; font-size: 14px; color: var(--gray); }

/* ── 문서 페이지 (약관/개인정보) ─────────── */
.doc { padding: 72px 0 96px; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: 32px; font-weight: 800; letter-spacing: -0.03em; }
.doc .updated { margin-top: 8px; }
.doc h2 { font-size: 19px; margin-top: 48px; }
.doc h3 { font-size: 16px; font-weight: 700; margin-top: 28px; }
.doc p, .doc li { font-size: 15px; color: #3A3936; margin-top: 12px; }
.doc ul, .doc ol { padding-left: 22px; margin-top: 8px; }
.doc li { margin-top: 6px; }
.doc table {
  width: 100%; border-collapse: collapse; margin-top: 16px; font-size: 14px;
}
.doc th, .doc td {
  text-align: left; padding: 10px 12px;
  border: 1px solid var(--line); vertical-align: top;
}
.doc th { background: rgba(0, 0, 0, 0.03); font-weight: 700; }

/* ── 푸터 ─────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 48px 0 64px;
}
.site-footer .wrap { display: flex; flex-direction: column; gap: 20px; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { font-size: 13px; color: var(--gray); text-decoration: none; }
.footer-links a:hover { color: var(--ink); }
.biz { font-size: 12px; color: var(--gray); line-height: 1.9; }

/* ── 반응형 ───────────────────────────── */
@media (max-width: 820px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 48px; padding-top: 64px; padding-bottom: 64px; }
  .tri-frame { margin: 0 auto; max-width: 280px; }
  .tri-grid, .steps { grid-template-columns: 1fr; }
  .price-grid { grid-template-columns: 1fr; }
  section { padding: 64px 0; }
  .nav { gap: 18px; }
}

/* 접근성 */
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 4px; }