:root {
  --surface: #FAF8F5;
  --surface-subtle: #F4EFEA;
  --surface-card: #FFFFFF;
  --surface-dim: #EFE9E0;
  --surface-warm: #FCFAF7;
  --primary: #1B4332;
  --primary-container: #2D6A4F;
  --primary-light: #D8F3DC;
  --accent: #744210;
  --on-surface: #1F2421;
  --on-surface-variant: #4A524D;
  --outline: #828D87;
  --outline-variant: #D5DDD8;
  --sand-border: #E3DCCF;
  --sand: #F0EAE1;
  --noise: #9B2C2C;

  --font-serif: 'Newsreader', 'Noto Serif KR', serif;
  --font-sans: 'Manrope', 'Pretendard', -apple-system, 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;

  --radius-sm: 4px;
  --radius: 8px;
  --max-w: 1280px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--surface);
  color: var(--on-surface);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
  overflow-wrap: break-word;
}
::selection { background: var(--primary-light); color: var(--primary); }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p, ul, ol, blockquote { margin: 0; }
ul { padding: 0; list-style: none; }
button { font: inherit; }

.mono { font-family: var(--font-mono); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

.wrap { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.wrap-6xl { max-width: 1152px; }
.wrap-4xl { max-width: 896px; }
.wrap-2xl { max-width: 672px; }

.paper { background-image: radial-gradient(rgba(27, 67, 50, 0.04) 1px, transparent 1px); background-size: 24px 24px; }

.icon { width: 1em; height: 1em; flex: none; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

.eyebrow { font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.16em; color: var(--accent); font-weight: 600; }

/* 버튼 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 12px;
  min-height: 48px; padding: 14px 28px;
  border-radius: var(--radius-sm); border: 1px solid var(--primary);
  font-size: 14px; font-weight: 500; letter-spacing: 0.02em;
  transition: background-color .2s, color .2s, transform .1s;
  cursor: pointer; white-space: nowrap;
}
.btn:active { transform: scale(0.99); }
.btn-primary { background: var(--primary); color: var(--surface); box-shadow: 0 6px 16px -6px rgba(27, 67, 50, 0.25); }
.btn-primary:hover { background: var(--primary-container); border-color: var(--primary-container); }
.btn-ghost { background: transparent; color: var(--primary); border-color: var(--sand-border); }
.btn-ghost:hover { background: var(--surface-subtle); border-color: var(--primary); }
.btn .icon { width: 16px; height: 16px; }
.btn-sm { min-height: 40px; padding: 8px 16px; font-size: 12px; gap: 8px; }
.btn-sm .icon { width: 14px; height: 14px; }

/* 머리 */
.masthead {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 248, 245, 0.9);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(227, 220, 207, 0.8);
}
.masthead .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 68px; padding-top: 10px; padding-bottom: 10px; }
.brand { display: flex; align-items: center; gap: 12px; min-height: 44px; }
.monogram {
  width: 32px; height: 32px; border-radius: 50%;
  border: 1px solid var(--primary); background: var(--surface);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-serif); font-size: 18px; font-weight: 500; color: var(--primary);
}
.brand-text { display: flex; flex-direction: column; }
.brand-name { font-family: var(--font-serif); font-size: 18px; font-weight: 500; letter-spacing: -0.01em; color: var(--primary); line-height: 1.2; }
.brand-sub { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--outline); white-space: nowrap; }
@media (max-width: 479px) { .brand-sub { display: none; } }
.nav { display: none; align-items: center; gap: 32px; font-size: 13px; letter-spacing: 0.02em; color: var(--on-surface-variant); font-weight: 500; }
.nav a { display: inline-flex; align-items: center; min-height: 44px; }
.nav a:hover { color: var(--primary); }
.masthead-actions { display: flex; align-items: center; gap: 16px; }
.dot { width: 6px; height: 6px; border-radius: 50%; background: #059669; }
@media (min-width: 900px) { .nav { display: flex; } }

/* 히어로 */
.hero { position: relative; padding: 48px 0 72px; border-bottom: 1px solid var(--sand-border); }
@media (min-width: 768px) { .hero { padding: 64px 0 96px; } }
.dateline {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px 16px;
  padding-bottom: 20px; border-bottom: 1px solid rgba(227, 220, 207, 0.8);
  font-family: var(--font-mono); font-size: 12px; color: var(--outline);
}

/* 히어로 쇼릴 — airirang 홈 히어로(.hero--reel) 포크. 영상은 화면 가득(머리글 68px + 테두리 1px 를 뺀 높이), 버튼은 영상 아래쪽 위에 */
.hero--reel { padding: 0; }
.reel-wrap { position: relative; height: calc(100vh - 69px); height: calc(100svh - 69px); min-height: 480px; overflow: hidden; background: var(--primary); }
.reel-still img, .reel-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.reel-video { z-index: 1; }
.reel-foot { position: absolute; left: 0; right: 0; bottom: 0; z-index: 2; padding-bottom: 36px; }
.reel-foot .hero-cta { justify-content: center; }
.reel-foot .btn-ghost { background: rgba(250, 248, 245, 0.94); } /* 투명이면 딥그린 장면에서 글자가 묻힌다 */
.reel-foot .btn-ghost:hover { background: var(--surface-subtle); }
.reel-foot .btn-primary { border-color: rgba(250, 248, 245, 0.7); } /* 딥그린 장면에서 단추 가장자리가 사라진다 */
@media (max-width: 639px) { .reel-foot { padding-bottom: 24px; } }
@media (prefers-reduced-motion: reduce) { .reel-video { display: none; } }

.hero-cta { display: flex; flex-direction: column; align-items: stretch; gap: 12px; }
@media (min-width: 640px) { .hero-cta { flex-direction: row; align-items: center; flex-wrap: wrap; gap: 16px; } }

/* 섹션 공통 */
.section { padding: 80px 0; border-bottom: 1px solid var(--sand-border); }
@media (min-width: 768px) { .section { padding: 96px 0; } }
.section-subtle { background: rgba(244, 239, 234, 0.5); }
.section-faint { background: rgba(244, 239, 234, 0.3); }
.section-head { display: flex; flex-direction: column; gap: 16px; padding-bottom: 32px; margin-bottom: 40px; border-bottom: 1px solid var(--sand-border); }
@media (min-width: 768px) { .section-head { flex-direction: row; align-items: flex-end; justify-content: space-between; } }
.section-head h2, .center-head h2 { font-family: var(--font-serif); font-weight: 400; font-size: clamp(28px, 4vw, 36px); line-height: 1.3; margin-top: 8px; color: var(--on-surface); }
.section-head p { font-size: 14px; color: var(--on-surface-variant); max-width: 448px; line-height: 1.7; }
.center-head { text-align: center; max-width: 672px; margin: 0 auto 56px; }
.center-head p { font-size: 15px; color: var(--on-surface-variant); line-height: 1.75; margin-top: 16px; }

/* 서재 목업 */
@media (max-width: 420px) {
}



/* 루틴 */

/* 문답 */
.faq { display: flex; flex-direction: column; gap: 16px; }
.faq-item { background: var(--surface-card); border: 1px solid var(--sand-border); border-radius: var(--radius-sm); padding: 24px; }
@media (max-width: 639px) { .faq-item { padding: 20px 16px; } }
.faq-item h3 { display: flex; align-items: baseline; gap: 12px; font-family: var(--font-serif); font-size: 18px; font-weight: 500; margin-bottom: 8px; line-height: 1.45; }
.faq-item h3 .q { font-family: var(--font-mono); font-size: 14px; font-weight: 700; color: var(--primary); flex: none; }
.faq-item p { font-size: 14px; color: var(--on-surface-variant); line-height: 1.75; padding-left: 36px; }
@media (max-width: 639px) { .faq-item p { padding-left: 0; } }

/* 마무리 */
.invite { padding: 96px 0; text-align: center; }
.invite .lede { font-family: var(--font-serif); font-style: italic; color: var(--primary); font-size: 16px; margin-bottom: 8px; display: block; }
.invite h2 { font-family: var(--font-serif); font-weight: 400; font-size: clamp(28px, 4vw, 36px); line-height: 1.35; margin-bottom: 24px; }
.invite p { font-size: 14px; color: var(--on-surface-variant); line-height: 1.75; margin: 0 auto 32px; max-width: 512px; }
.invite-cta { display: flex; flex-direction: column; align-items: stretch; justify-content: center; gap: 12px; max-width: 420px; margin: 0 auto; }
@media (min-width: 640px) { .invite-cta { flex-direction: row; max-width: none; gap: 16px; } }

.notice { padding: 32px 0; background: rgba(244, 239, 234, 0.8); border-top: 1px solid var(--sand-border); }
.notice-box { padding: 20px; border: 1px solid var(--sand-border); border-radius: var(--radius-sm); background: var(--surface-card); display: flex; align-items: flex-start; gap: 16px; }
.notice-box .icon { width: 20px; height: 20px; color: var(--outline); margin-top: 2px; }
.notice-box h2 { font-family: var(--font-serif); font-size: 14px; font-weight: 500; margin-bottom: 4px; }
.notice-box p { font-size: 12px; color: var(--on-surface-variant); line-height: 1.7; }

/* 꼬리 */
.footer { background: var(--surface-subtle); border-top: 1px solid var(--sand-border); }
.footer .wrap { padding-top: 48px; padding-bottom: 48px; display: flex; flex-direction: column; gap: 24px; }
.footer-top { display: flex; flex-direction: column; gap: 20px; padding-bottom: 24px; border-bottom: 1px solid rgba(227, 220, 207, 0.6); }
@media (min-width: 768px) { .footer-top { flex-direction: row; align-items: center; justify-content: space-between; } }
.footer-brand { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.footer-brand .monogram { width: 24px; height: 24px; font-size: 12px; }
.footer-brand .name { font-family: var(--font-serif); font-size: 16px; font-weight: 500; }
.footer-brand .domain { font-family: var(--font-mono); font-size: 12px; color: var(--outline); }
.footer-links { display: flex; flex-wrap: wrap; gap: 4px 24px; font-size: 12px; color: var(--on-surface-variant); }
.footer-links a { display: inline-flex; align-items: center; min-height: 44px; }
.footer-links a:hover { color: var(--primary); }
.footer-legal { font-size: 12px; color: var(--outline); line-height: 1.75; }
.footer-legal p + p { margin-top: 6px; }
.footer-legal a { text-decoration: underline; text-underline-offset: 2px; }

/* 문서 쪽(약관·처리방침·404) */
.doc { padding: 56px 0 96px; }
.doc .wrap { max-width: 800px; }
.doc-back { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; font-family: var(--font-mono); font-size: 12px; color: var(--outline); margin-bottom: 16px; }
.doc-back:hover { color: var(--primary); }
.doc h1 { font-family: var(--font-serif); font-weight: 500; font-size: clamp(28px, 4vw, 40px); letter-spacing: -0.02em; line-height: 1.3; }
.doc .meta { font-family: var(--font-mono); font-size: 12px; color: var(--outline); margin: 8px 0 32px; }
.doc .lead-box { background: var(--surface-card); border: 1px solid var(--sand-border); border-left: 3px solid var(--primary); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 20px 24px; margin-bottom: 8px; font-size: 15px; line-height: 1.75; color: var(--on-surface); }
.doc h2 { font-family: var(--font-serif); font-weight: 500; font-size: 22px; margin: 40px 0 14px; color: var(--on-surface); }
.doc p, .doc li { font-size: 15px; color: var(--on-surface-variant); line-height: 1.85; }
.doc p + p { margin-top: 10px; }
.doc ol, .doc ul.list { padding-left: 1.4em; margin: 0; }
.doc ul.list { list-style: disc; }
.doc li + li { margin-top: 6px; }
.doc a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.doc table { width: 100%; border-collapse: collapse; margin: 8px 0; font-size: 14px; }
.doc th, .doc td { border: 1px solid var(--sand-border); padding: 10px 12px; text-align: left; vertical-align: top; color: var(--on-surface-variant); line-height: 1.65; }
.doc th { background: var(--surface-subtle); color: var(--on-surface); font-weight: 600; }
.doc .table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.doc .contact-box { margin-top: 48px; padding: 28px; background: var(--surface-subtle); border: 1px solid var(--sand-border); border-radius: var(--radius); }
.doc .contact-box h2 { margin-top: 0; }

.notfound { min-height: 70vh; display: flex; align-items: center; text-align: center; }
.notfound .wrap { max-width: 640px; }
.notfound .code { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.2em; color: var(--accent); }
.notfound h1 { font-family: var(--font-serif); font-weight: 400; font-size: clamp(30px, 5vw, 44px); margin: 12px 0 16px; line-height: 1.3; }
.notfound p { color: var(--on-surface-variant); margin-bottom: 32px; }
.notfound .invite-cta { max-width: 420px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ── 10-28 «차트 프로그램» 판 — 차트 기본기 · 그리기 도구 · 요금제 ── */
.feat-grid { display: grid; grid-template-columns: 1fr; gap: 16px; margin-bottom: 48px; }
@media (min-width: 640px) { .feat-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .feat-grid { grid-template-columns: repeat(3, 1fr); } }
.feat { border-top: 2px solid var(--primary); padding-top: 16px; }
.feat h3 { font-family: var(--font-serif); font-size: 19px; font-weight: 500; margin-bottom: 8px; }
.feat p { font-size: 14px; color: var(--on-surface-variant); line-height: 1.75; }

.tool-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 640px) { .tool-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .tool-grid { grid-template-columns: repeat(4, 1fr); } }
.tool-card { position: relative; background: var(--surface-card); border: 1px solid var(--sand-border); border-radius: var(--radius); padding: 20px; display: flex; flex-direction: column; gap: 10px; }
.tool-card.pro { border-color: rgba(201, 166, 107, 0.7); }
.tool-top { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.tool-top h3 { font-family: var(--font-serif); font-size: 19px; font-weight: 500; }
.tool-n { font-family: var(--font-mono); font-size: 26px; font-weight: 600; color: var(--primary); }
.tool-card p { font-size: 13px; color: var(--on-surface-variant); line-height: 1.7; flex: 1; }
.tier { align-self: flex-start; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em; padding: 2px 8px; border-radius: 999px; background: var(--primary-light); color: var(--primary); }
.tool-card.pro .tier, .tool-extra .tier { background: #F5EBD8; color: var(--accent); }
.tool-extra { margin-top: 24px; display: grid; gap: 8px; font-size: 14px; color: var(--on-surface-variant); line-height: 1.75; }
.tool-extra b { color: var(--on-surface); font-weight: 600; margin-right: 8px; }
.tool-extra .tier { display: inline-block; margin-left: 6px; }

.price-grid { display: grid; grid-template-columns: 1fr; gap: 20px; align-items: stretch; max-width: 820px; margin: 0 auto; }
@media (min-width: 720px) { .price-grid { grid-template-columns: 1fr 1fr; } }
.price-card { background: var(--surface-card); border: 1px solid var(--sand-border); border-radius: var(--radius); padding: 28px; display: grid; grid-template-rows: auto auto 1fr; gap: 14px; min-width: 0; }
.price-card.hot { border: 2px solid rgba(27, 67, 50, 0.35); padding: 27px; box-shadow: 0 8px 24px -12px rgba(27, 67, 50, 0.25); }
.price-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 30px; }
.price-top h3 { font-family: var(--font-serif); font-size: 22px; font-weight: 500; margin: 0; }
.price-flag { flex: none; font-family: var(--font-mono); font-size: 11px; padding: 3px 10px; border-radius: 999px; background: var(--primary); color: var(--surface); }
.price-card .price { margin: 0; display: flex; align-items: baseline; gap: 6px; }
.price-card .price b { font-family: var(--font-serif); font-size: 34px; font-weight: 500; color: var(--primary); line-height: 1; }
.price-card .price span { font-size: 14px; color: var(--outline); }
.price-card ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; align-content: start; }
.price-card li { font-size: 14px; color: var(--on-surface-variant); line-height: 1.6; padding-left: 18px; position: relative; }
.price-card li::before { content: ''; position: absolute; left: 2px; top: 9px; width: 7px; height: 7px; border-radius: 50%; background: var(--primary-container); }
.price-note { margin: 24px auto 0; max-width: 720px; font-size: 13px; color: var(--on-surface-variant); line-height: 1.75; text-align: center; }
.price-note a, .faq-item p a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }


/* ── 10-28 개편 2판 — 출시 준비 표시 · 소개 2단 · 실제 앱 캡처 ── */
.login-link { font-size: 13px; color: var(--on-surface-variant); text-decoration: none; padding: 8px 6px; }
.login-link:hover { color: var(--primary); }
.status-pill { display: inline-flex; align-items: center; gap: 8px; min-height: 40px; padding: 0 14px; border-radius: 999px; background: rgba(250, 248, 245, 0.92); border: 1px solid var(--sand-border); font-size: 13px; color: var(--on-surface); }
.status-pill.sm { min-height: 34px; padding: 0 12px; font-size: 12px; }
.status-pill .dot { width: 8px; height: 8px; border-radius: 50%; background: #C9A66B; }
.intro-grid { display: grid; grid-template-columns: 1fr; gap: 40px; align-items: center; }
@media (min-width: 1024px) { .intro-grid { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 56px; } }
.intro-text h2 { font-family: var(--font-serif); font-weight: 400; font-size: clamp(30px, 4.2vw, 44px); line-height: 1.2; margin: 12px 0 16px; }
.intro-text > p { font-size: 16px; color: var(--on-surface-variant); line-height: 1.75; }
.facts { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 12px; }
.facts li { display: grid; grid-template-columns: 9.5em 1fr; gap: 12px; align-items: baseline; padding-top: 12px; border-top: 1px solid var(--sand-border); font-size: 14px; }
.facts b { font-family: var(--font-serif); font-weight: 500; font-size: 17px; color: var(--primary); }
.facts span { color: var(--on-surface-variant); }
@media (max-width: 479px) { .facts li { grid-template-columns: 1fr; gap: 2px; } }
.intro-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.shot { margin: 0; border: 1px solid var(--sand-border); border-radius: var(--radius); overflow: hidden; background: var(--surface-card); box-shadow: 0 24px 48px -28px rgba(31, 36, 33, 0.35); }
.shot img { display: block; width: 100%; height: auto; }
.shot-wide { margin: 0 0 40px; }
.shot figcaption { padding: 10px 16px; font-family: var(--font-mono); font-size: 12px; color: var(--outline); border-top: 1px solid var(--sand-border); }