/* ============================================================
   ELOI — 지구·생명기원연구소
   디자인 시스템: _claude/assets/design-picks/design-md/elevenlabs.md
   파스텔은 지구·생명 톤으로 대체 (이끼·사암·현무암·황토·심해청록)
   ============================================================ */

:root {
  /* 표면 */
  --canvas:        #f5f5f5;
  --canvas-soft:   #fafafa;
  --surface-card:  #ffffff;
  --surface-strong:#f0efed;
  --surface-dark:  #0c0a09;

  /* 선 */
  --hairline:      #e7e5e4;
  --hairline-soft: #f0efed;
  --hairline-strong:#d6d3d1;

  /* 글자 */
  --ink:        #0c0a09;
  --body:       #4e4e4e;
  --body-strong:#292524;
  --muted:      #777169;
  --muted-soft: #a8a29e;
  --on-primary: #ffffff;

  /* 동작 */
  --primary:        #292524;
  --primary-active: #0c0a09;

  /* 지구·생명 톤 (배경 분위기 전용 — 버튼·글자 금지) */
  --orb-moss:   156, 178, 155;
  --orb-sand:   216, 198, 166;
  --orb-basalt: 147, 162, 176;
  --orb-ochre:  199, 161, 132;
  --orb-teal:   127, 158, 155;

  /* 간격 */
  --section: 96px;
  --container: 1200px;
  --gutter: 120px;

  /* 모서리 */
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-pill: 9999px;

  --font-ko: 'Noto Sans KR', system-ui, sans-serif;
  --font-la: 'Inter', system-ui, sans-serif;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --canvas:        #0c0a09;
    --canvas-soft:   #141210;
    --surface-card:  #1c1917;
    --surface-strong:#292524;
    --hairline:      #292524;
    --hairline-soft: #1c1917;
    --hairline-strong:#3a3532;
    --ink:        #f5f5f5;
    --body:       #b8b3ad;
    --body-strong:#e7e5e4;
    --muted:      #a8a29e;
    --muted-soft: #777169;
    --primary:        #f5f5f5;
    --primary-active: #ffffff;
    --on-primary: #0c0a09;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--body);
  font-family: var(--font-ko);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.62;
  letter-spacing: 0.16px;
  -webkit-font-smoothing: antialiased;
}

:lang(en) body, .lat { font-family: var(--font-la); }

a { color: inherit; text-decoration: none; }
a:hover { color: var(--muted); }
img { max-width: 100%; height: auto; }

h1, h2, h3, h4 {
  color: var(--ink);
  font-weight: 300;
  letter-spacing: -0.4px;
  text-wrap: pretty;
  margin: 0;
}

p { margin: 0; text-wrap: pretty; }

/* ---------- 레이아웃 ---------- */

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

.band { padding: var(--section) 0; }
.band--soft { background: var(--canvas-soft); border-top: 1px solid var(--hairline-soft); }
.band--line { border-top: 1px solid var(--hairline-soft); }

.grid { display: grid; gap: 24px; }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.stack { display: flex; flex-direction: column; }
.row { display: flex; align-items: center; }

/* ---------- 상단 내비 ---------- */

.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; border-bottom: 1px solid var(--hairline);
  background: var(--canvas);
  position: sticky; top: 0; z-index: 10;
}
.nav__inner { max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter);
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: baseline; gap: 12px; }
.brand__mark { font-family: var(--font-la); font-size: 20px; font-weight: 500;
  letter-spacing: 1.6px; color: var(--ink); }
.brand__name { font-size: 13px; font-weight: 300; color: var(--muted); letter-spacing: 0.3px; }
.menu { display: flex; align-items: center; gap: 28px; }
.menu a { font-size: 15px; color: var(--ink); white-space: nowrap; }
.menu a[aria-current="page"] { font-weight: 500; border-bottom: 1px solid var(--ink); padding-bottom: 2px; }
.lang { display: flex; align-items: center; gap: 16px; font-family: var(--font-la);
  font-size: 13px; letter-spacing: 0.5px; }
.lang a { color: var(--muted-soft); }
.lang [aria-current] { color: var(--ink); font-weight: 500; }

.nav__toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; color: var(--ink); }

/* ---------- 히어로 ---------- */

.hero { position: relative; overflow: hidden; padding: 128px 0 112px; }
.hero--sub { padding: 80px 0 64px; border-bottom: 1px solid var(--hairline); }
.hero__inner { position: relative; }

.orb { position: absolute; border-radius: var(--r-pill); filter: blur(8px); pointer-events: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .orb { opacity: 0.5; } }

.eyebrow { font-family: var(--font-la); font-size: 12px; font-weight: 500;
  letter-spacing: 1.6px; color: var(--muted); text-transform: uppercase; }

.display-1 { font-size: 76px; line-height: 1.08; letter-spacing: -2.2px; }
.display-2 { font-size: 52px; line-height: 1.18; letter-spacing: -1.1px; }
.display-3 { font-size: 40px; line-height: 1.28; letter-spacing: -0.5px; }
.display-4 { font-size: 36px; line-height: 1.17; letter-spacing: -0.4px; }
.display-5 { font-size: 30px; line-height: 1.25; letter-spacing: -0.3px; }
.display-6 { font-size: 24px; line-height: 1.25; letter-spacing: 0; }

.lede { font-size: 20px; font-weight: 300; line-height: 1.62; color: var(--body-strong); }
.lede--lg { font-size: 22px; line-height: 1.72; }

/* ---------- 버튼 ---------- */

.btn { display: inline-flex; align-items: center; height: 44px; padding: 0 24px;
  border-radius: var(--r-pill); font-size: 15px; font-weight: 500; }
.btn--primary { background: var(--primary); color: var(--on-primary); }
.btn--primary:hover { background: var(--primary-active); color: var(--on-primary); }
.btn--outline { border: 1px solid var(--hairline-strong); color: var(--ink); }
.btn--outline:hover { border-color: var(--ink); color: var(--ink); }
.btn--sm { height: 32px; padding: 0 16px; font-size: 14px; }

/* ---------- 카드 ---------- */

.card { background: var(--surface-card); border: 1px solid var(--hairline);
  border-radius: var(--r-xl); overflow: hidden; }
.card__body { padding: 28px 24px 32px; }
.card--pad { padding: 32px; }
.card--pad-sm { padding: 24px 28px; }

.badge { display: inline-flex; align-items: center; height: 24px; padding: 0 10px;
  border-radius: var(--r-pill); background: var(--surface-strong);
  font-family: var(--font-la); font-size: 12px; font-weight: 600;
  letter-spacing: 0.96px; color: var(--ink); }
.badge--out { background: transparent; border: 1px solid var(--hairline); color: var(--body);
  font-family: var(--font-ko); font-weight: 500; letter-spacing: 0; }

.meta { font-size: 14px; color: var(--muted); }
.eg { font-family: var(--font-la); color: var(--muted-soft); font-weight: 400; }

/* ---------- 자리표시 ---------- */

.ph { display: flex; align-items: center; justify-content: center;
  border: 1px dashed var(--hairline-strong); color: var(--muted);
  font-family: var(--font-la); font-size: 12px; font-weight: 500; letter-spacing: 1px; }
.ph--card { border-bottom: 1px dashed var(--hairline-strong); border-width: 0 0 1px; height: 200px; }
.ph--video { position: relative; height: 216px; border-radius: var(--r-xl); background: var(--surface-strong); }
.ph--video span { position: absolute; bottom: 12px; right: 14px; }
.ph--fig { height: 380px; border-radius: var(--r-xl); }
.ph--avatar { width: 56px; height: 56px; border-radius: var(--r-pill);
  background: var(--surface-strong); flex-shrink: 0; }

.tex-moss   { background: repeating-linear-gradient(45deg, rgba(var(--orb-moss),.07) 0 12px, rgba(var(--orb-moss),.14) 12px 24px); }
.tex-sand   { background: repeating-linear-gradient(45deg, rgba(var(--orb-sand),.07) 0 12px, rgba(var(--orb-sand),.14) 12px 24px); }
.tex-basalt { background: repeating-linear-gradient(45deg, rgba(var(--orb-basalt),.07) 0 12px, rgba(var(--orb-basalt),.14) 12px 24px); }
.tex-ochre  { background: repeating-linear-gradient(45deg, rgba(var(--orb-ochre),.07) 0 12px, rgba(var(--orb-ochre),.14) 12px 24px); }
.tex-teal   { background: repeating-linear-gradient(45deg, rgba(var(--orb-teal),.07) 0 12px, rgba(var(--orb-teal),.14) 12px 24px); }

/* ---------- 본문 조판 ---------- */

.prose { max-width: 720px; }
.prose p { font-size: 17px; line-height: 1.85; color: var(--body-strong); }
.prose p + p { margin-top: 20px; }
.prose h2 { margin-top: 0; }
.prose strong { font-weight: 500; color: var(--ink); }
.prose em { font-style: normal; border-bottom: 1px solid var(--hairline-strong); }

.pull { padding: 32px 36px; background: var(--surface-card);
  border-left: 2px solid rgb(var(--orb-teal)); border-radius: 0 var(--r-lg) var(--r-lg) 0; }
.pull p { font-size: 21px; font-weight: 300; line-height: 1.62; letter-spacing: -0.1px; color: var(--ink); }

.figcap { font-size: 14px; line-height: 1.6; color: var(--muted); }

.step { display: flex; align-items: baseline; gap: 16px; }
.step__no { font-family: var(--font-la); font-size: 13px; font-weight: 600;
  letter-spacing: 0.96px; color: var(--muted-soft); }

/* ---------- 목차 ---------- */

.toc { display: flex; flex-direction: column; gap: 4px; }
.toc__row { display: flex; gap: 12px; padding: 10px 0; border-top: 1px solid var(--hairline); }
.toc__row:last-of-type { border-bottom: 1px solid var(--hairline); }
.toc__no { font-family: var(--font-la); font-size: 13px; color: var(--muted-soft); width: 16px; }

/* ---------- 목록 행 ---------- */

.listrow { display: flex; align-items: center; gap: 20px; padding: 16px 0;
  border-top: 1px solid var(--hairline); }
.listrow:last-child { border-bottom: 1px solid var(--hairline); }

.datecard { display: flex; gap: 24px; }
.datecard__d { display: flex; flex-direction: column; align-items: center; justify-content: center;
  width: 64px; flex-shrink: 0; border-right: 1px solid var(--hairline); padding-right: 20px;
  font-family: var(--font-la); }
.datecard__m { font-size: 12px; font-weight: 600; letter-spacing: 0.96px; color: var(--muted); }
.datecard__n { font-size: 28px; font-weight: 300; color: var(--ink); }

/* ---------- 푸터 ---------- */

.foot { padding: 64px 0 48px; border-top: 1px solid var(--hairline); }
.foot__cols { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 32px; margin-bottom: 56px; }
.foot__h { font-family: var(--font-la); font-size: 12px; font-weight: 600;
  letter-spacing: 0.96px; color: var(--muted-soft); }
.foot__col { display: flex; flex-direction: column; gap: 10px; }
.foot__col a { font-size: 15px; color: var(--body); }
.foot__bottom { display: flex; align-items: center; justify-content: space-between;
  padding-top: 28px; border-top: 1px solid var(--hairline-soft);
  font-family: var(--font-la); font-size: 14px; color: var(--muted-soft); }

/* ---------- 유틸 ---------- */

.mb-8 { margin-bottom: 8px; } .mb-12 { margin-bottom: 12px; } .mb-16 { margin-bottom: 16px; }
.mb-20 { margin-bottom: 20px; } .mb-24 { margin-bottom: 24px; } .mb-28 { margin-bottom: 28px; }
.mb-32 { margin-bottom: 32px; } .mb-36 { margin-bottom: 36px; } .mb-44 { margin-bottom: 44px; }
.mb-48 { margin-bottom: 48px; } .mb-56 { margin-bottom: 56px; }
.gap-6 { gap: 6px; } .gap-8 { gap: 8px; } .gap-10 { gap: 10px; } .gap-12 { gap: 12px; }
.gap-16 { gap: 16px; } .gap-20 { gap: 20px; } .gap-24 { gap: 24px; }
.between { justify-content: space-between; } .baseline { align-items: baseline; }
.start { align-self: flex-start; } .grow { flex-grow: 1; }
.center { text-align: center; align-items: center; }
.nowrap { white-space: nowrap; }

/* ============================================================
   반응형
   ============================================================ */

@media (max-width: 1080px) {
  :root { --gutter: 48px; --section: 72px; }
  .display-1 { font-size: 56px; letter-spacing: -1.5px; }
  .display-2 { font-size: 42px; letter-spacing: -0.8px; }
  .foot__cols { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px 32px; }
}

@media (max-width: 860px) {
  .menu { display: none; }
  .nav__toggle { display: block; }
  .nav--open .menu { display: flex; position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--canvas); border-bottom: 1px solid var(--hairline);
    padding: 8px var(--gutter) 16px; }
  .nav--open .menu a { padding: 12px 0; width: 100%; }
  .grid--3, .grid--2 { grid-template-columns: minmax(0, 1fr); }
  .split { grid-template-columns: minmax(0, 1fr) !important; gap: 56px !important; }
  .article { grid-template-columns: minmax(0, 1fr) !important; gap: 40px !important; }
  .toc { order: -1; }
}

@media (max-width: 620px) {
  :root { --gutter: 20px; --section: 56px; }
  .hero { padding: 72px 0 64px; }
  .hero--sub { padding: 48px 0 40px; }
  .display-1 { font-size: 38px; letter-spacing: -1px; }
  .display-2 { font-size: 30px; letter-spacing: -0.5px; }
  .display-3 { font-size: 26px; }
  .display-4 { font-size: 26px; }
  .display-5 { font-size: 24px; }
  .lede, .lede--lg { font-size: 17px; }
  .prose p { font-size: 16px; line-height: 1.8; }
  .pull { padding: 24px; }
  .pull p { font-size: 18px; }
  .brand__name { display: none; }
  .foot__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .foot__bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
  .ph--fig { height: 220px; }
  .btn { width: 100%; justify-content: center; }
  .hero .row { flex-direction: column; align-items: stretch; }
}