/* ORBIT Lab — 가상의 궤도역학·초소형위성 연구실 디자인 샘플 (디코랩)
   우주 검정 · 주황 · 은. 제목 Saira Condensed(OFL), 본문 Pretendard(OFL). 큰 면은 검정·흰색만, 주황은 버튼·궤적·강조 글자에만. */
:root {
  --space: #05060A;
  --space-2: #0B0D12;
  --space-3: #151922;
  --orange: #FF7A00;
  --orange-ink: #B84E00;      /* 흰 바탕 위 주황 글자(대비 5:1) */
  --silver: #C9CED6;
  --steel: #8A93A3;           /* 검은 바탕 위 보조 글자 */
  --paper: #FFFFFF;
  --mist: #F1F2F4;
  --line: #E1E4E9;
  --ink: #0B0D12;
  --muted: #5A616E;
  --cyan: #00A3E0;            /* 군집 주제 */
  --t-smallsat: var(--orange);
  --t-debris: #7B8494;
  --t-constellation: var(--cyan);
  --font: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, system-ui, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  --display: "Saira Condensed", "Pretendard Variable", Pretendard, sans-serif;
  --radius: 18px;
  --gut: 24px;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font); font-size: 17px; line-height: 1.75; letter-spacing: -0.01em;
  word-break: keep-all; overflow-wrap: anywhere; overflow-x: clip;
}
html[lang="en"] body { letter-spacing: 0; line-height: 1.65; }
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { text-wrap: balance; margin: 0; line-height: 1.25; letter-spacing: -0.015em; }
p { text-wrap: pretty; margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
[role="list"] { list-style: none; }
[hidden] { display: none !important; }
button { font: inherit; color: inherit; }
.num { font-variant-numeric: tabular-nums; }
.wrap { width: 100%; max-width: 1280px; margin-inline: auto; padding-inline: var(--gut); }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 16px; top: -60px; z-index: 300; padding: 10px 16px; background: var(--orange); color: var(--space); border-radius: 10px; font-weight: 700; }
.skip-link:focus { top: 12px; }
.ph { display: inline-block; padding: 0 8px; border: 1px dashed currentColor; border-radius: 6px; font-size: .92em; opacity: .8; }
.fine { font-size: 14px; color: var(--muted); margin-top: 24px; }
.fict { color: var(--muted); font-weight: 400; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }

/* ---------- 디자인 샘플 안내 띠 (고정은 /demo/_shared/sample-banner.*) ---------- */
.sample-banner { background: #1B1F28; color: rgba(255,255,255,.88); font-size: .8125rem; line-height: 1.5; }
.sample-banner__inner { display: flex; align-items: center; gap: 10px; padding-block: 8px; }
.sample-banner__inner p { margin: 0; }
.sample-banner__tag { flex: none; padding: 2px 8px; border-radius: 100px; background: var(--orange); color: var(--space); font-weight: 700; font-size: .75rem; }
.sample-banner__link { color: #fff; text-decoration: underline; text-underline-offset: 3px; }

/* ---------- 버튼 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; min-height: 50px; padding: 0 24px; border-radius: 100px; border: 2px solid transparent;
  font-weight: 700; font-size: 16px; text-decoration: none; line-height: 1.2; cursor: pointer;
  transition: background-color .2s, color .2s, border-color .2s, transform .2s;
}
.btn--orange { background: var(--orange); color: var(--space); }
.btn--orange:hover { background: #FF9433; }
.btn--line { border-color: currentColor; color: inherit; }
.btn--line:hover { background: rgba(255,255,255,.1); }
.btn--ink { background: var(--ink); color: #fff; }
.btn--ink:hover { background: #262B36; }
.linkbtn { background: none; border: 0; padding: 0; color: var(--orange-ink); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }

/* ---------- 위 얇은 투명 띠 (글자는 아래 색과 반전) ---------- */
.strip { position: fixed; top: 0; left: 0; right: 0; z-index: 90; color: #fff; mix-blend-mode: difference; pointer-events: none; }
.strip__in { display: flex; align-items: center; gap: 24px; height: 52px; padding-inline: var(--gut); max-width: 1440px; margin-inline: auto; }
.strip a, .strip button { pointer-events: auto; }
.logo { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; color: inherit; flex: none; }
.logo__mark { width: 28px; height: 28px; }
.logo__t { font-family: var(--display); font-size: 22px; font-weight: 800; letter-spacing: .02em; line-height: 1; }
.logo__t b { font-weight: 400; }
.strip__where { margin: 0; font-family: var(--display); font-size: 16px; letter-spacing: .04em; opacity: .9; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
html[lang="ko"] .strip__where { font-family: var(--font); letter-spacing: 0; font-size: 15px; }
.tdots { flex: 1; display: flex; justify-content: center; }
.tdots ol { display: flex; gap: 4px; }
.tdots a { display: flex; align-items: center; gap: 7px; padding: 6px 8px; text-decoration: none; font-family: var(--display); font-size: 15px; letter-spacing: .04em; opacity: .62; transition: opacity .2s; }
html[lang="ko"] .tdots a { font-family: var(--font); letter-spacing: 0; font-size: 14px; }
.tdots__dot { width: 7px; height: 7px; border-radius: 50%; border: 1.5px solid currentColor; transition: background-color .2s; }
.tdots a:hover, .tdots a.is-active { opacity: 1; }
.tdots a.is-active .tdots__dot { background: currentColor; }
.strip__utc { margin: 0 0 0 auto; font-family: var(--display); font-size: 16px; letter-spacing: .06em; white-space: nowrap; opacity: .85; }
.strip__utc span { opacity: .7; }
.tdots + .strip__utc { margin-left: 0; }
.lang { display: flex; align-items: center; gap: 4px; font-size: 14px; font-weight: 700; }
.lang svg { width: 18px; height: 18px; margin-right: 2px; }
.lang a { padding: 4px 4px; text-decoration: none; opacity: .65; border-bottom: 2px solid transparent; }
.lang a[aria-current] { opacity: 1; border-bottom-color: currentColor; }
.lang__sep { opacity: .5; }

/* ---------- 오른쪽 아래 둥근 메뉴 단추 + 펼쳐지는 판 ---------- */
.orb {
  position: fixed; right: 24px; bottom: calc(24px + env(safe-area-inset-bottom)); z-index: 130; width: 78px; height: 78px; border-radius: 50%;
  border: 0; background: var(--orange); color: var(--space); cursor: pointer; display: grid; place-items: center; align-content: center; gap: 2px;
  box-shadow: 0 8px 24px rgba(5,6,10,.28); transition: background-color .25s, color .25s, transform .25s;
}
.orb:hover { transform: scale(1.05); }
.orb__ring { position: relative; width: 30px; height: 14px; border: 2px solid currentColor; border-radius: 50%; transform: rotate(-20deg); transition: transform .4s; }
.orb__ring i { position: absolute; right: -4px; top: -3px; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.orb__t { font-family: var(--display); font-weight: 800; font-size: 15px; letter-spacing: .08em; text-transform: uppercase; line-height: 1; }
html[lang="ko"] .orb__t { font-family: var(--font); letter-spacing: 0; font-size: 13px; text-transform: none; }
.orb[aria-expanded="true"] { background: var(--paper); color: var(--space); }
.orb[aria-expanded="true"] .orb__ring { transform: rotate(160deg); }
body.menu-open .orb { box-shadow: none; }

.pmenu {
  position: fixed; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 120; width: min(980px, calc(100vw - 32px));
  max-height: calc(100dvh - var(--sample-banner-h, 0px) - 32px); overflow: auto; overscroll-behavior: contain;
  background: var(--space); color: #fff; border-radius: 32px; border: 1px solid #262B36;
  clip-path: circle(0 at calc(100% - 55px) calc(100% - 55px)); transition: clip-path .55s cubic-bezier(.6,0,.2,1);
}
.pmenu.is-open { clip-path: circle(150% at calc(100% - 55px) calc(100% - 55px)); }
.pmenu__in { padding: 36px 40px 40px; }
.pmenu__home { margin: 0 0 18px; }
.pmenu__home a { font-family: var(--display); font-size: 18px; letter-spacing: .06em; color: var(--steel); text-decoration: none; }
html[lang="ko"] .pmenu__home a { font-family: var(--font); letter-spacing: 0; }
.pmenu__groups { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px 32px; }
.pmenu__g { display: block; font-family: var(--display); font-weight: 800; font-size: 36px; line-height: 1; letter-spacing: .01em; text-transform: uppercase; text-decoration: none; color: #fff; margin-bottom: 10px; }
.pmenu__g small { display: block; font-family: var(--font); font-size: 14px; font-weight: 500; text-transform: none; color: var(--steel); margin-top: 6px; letter-spacing: 0; }
.pmenu__group.is-current .pmenu__g span { color: var(--orange); }
.pmenu__group ul { display: grid; gap: 2px; }
.pmenu__group li a { display: block; padding: 5px 0; color: var(--silver); text-decoration: none; font-size: 16px; line-height: 1.4; }
.pmenu__group li a:hover { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.pmenu__group li a[aria-current="page"] { color: var(--orange); font-weight: 700; }
.pmenu a[aria-current="page"]::before { content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--orange); margin-right: 8px; vertical-align: 3px; }
.pmenu__foot { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 24px; margin-top: 36px; padding-top: 24px; padding-right: 90px; border-top: 1px solid #262B36; }
.lang--menu { color: #fff; }
.lang--menu a[aria-current] { color: var(--orange); border-bottom-color: var(--orange); }
.pmenu__mail { color: var(--silver); }
body.menu-open .strip { visibility: hidden; }

/* ---------- 섹션 공통 ---------- */
.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 12px; font-family: var(--display); font-size: 17px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--orange-ink); }
html[lang="ko"] .eyebrow { font-family: var(--font); letter-spacing: 0; text-transform: none; font-size: 15px; font-weight: 700; }
.eyebrow::before { content: ""; width: 22px; height: 2px; background: currentColor; }
.eyebrow--dark { color: var(--orange); }
.sechead { margin-bottom: 40px; }
.sechead__t { font-size: clamp(28px, 2rem + 1.2vw, 44px); font-weight: 700; }
html[lang="en"] .sechead__t { font-family: var(--display); font-weight: 800; font-size: clamp(34px, 2rem + 2vw, 58px); line-height: 1.02; letter-spacing: 0; }
.sechead__lead { max-width: 40em; color: var(--muted); margin-top: 14px; }
.sechead--row { display: grid; grid-template-columns: 1fr 1.2fr; column-gap: 48px; align-items: end; }
.sechead--row .eyebrow { grid-column: 1 / -1; justify-self: start; }
.sechead--row .sechead__lead { margin: 0; }
.sechead--split { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; }
.more { margin-top: 28px; }
.more a:not(.btn) { font-weight: 700; color: var(--orange-ink); text-underline-offset: 4px; }
.h2 { font-size: 24px; font-weight: 700; margin: 0 0 16px; }
html[lang="en"] .h2 { font-family: var(--display); font-weight: 800; font-size: 30px; letter-spacing: .01em; line-height: 1.1; }
.lead { font-size: 20px; line-height: 1.6; font-weight: 500; }
.autonote { display: flex; align-items: center; gap: 10px; margin: 0; font-size: 14px; color: var(--muted); }
.autonote__dot { width: 9px; height: 9px; border-radius: 50%; background: #1DB954; box-shadow: 0 0 0 4px rgba(29,185,84,.18); flex: none; }

/* 주제 꼬리표·점 */
.tag { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; color: var(--ink); line-height: 1.3; }
.tag i, .dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; flex: none; background: var(--t-smallsat); }
.tag--debris i, .dot--debris { background: var(--t-debris); }
.tag--constellation i, .dot--constellation { background: var(--t-constellation); }
.ptype { display: inline-block; padding: 2px 9px; border-radius: 100px; border: 1px solid var(--line); font-size: 12px; font-weight: 700; color: var(--muted); white-space: nowrap; }
.ptype--ij { border-color: var(--ink); color: var(--ink); }
.ptype--ic { border-color: var(--orange-ink); color: var(--orange-ink); }

/* ---------- 히어로: 캔버스 지구 ---------- */
.hero { position: relative; background: var(--space); color: #fff; min-height: max(680px, calc(100svh - var(--sample-banner-h, 0px))); display: grid; grid-template-rows: 1fr auto; overflow: hidden; }
.hero__stage { position: absolute; top: 0; bottom: 0; right: -4%; width: 66%; }
.hero__canvas { width: 100%; height: 100%; }
.hero__still { position: absolute; inset: 0; margin: auto; width: min(100%, 720px); height: auto; aspect-ratio: 1; display: none; }
html:not(.js) .hero__still { display: block; }
html:not(.js) .hero__canvas { display: none; }
.hero__copy { position: relative; z-index: 2; align-self: center; padding-top: 110px; padding-bottom: 24px; }
.hero__copy > * { max-width: 600px; }
.hero__kicker { font-family: var(--display); font-size: 18px; letter-spacing: .08em; color: var(--silver); text-transform: uppercase; margin-bottom: 18px; }
html[lang="ko"] .hero__kicker { font-family: var(--font); text-transform: none; letter-spacing: 0; font-size: 15px; }
.hero__t { font-family: var(--display); font-weight: 600; font-size: clamp(52px, 2.4rem + 4vw, 104px); line-height: .95; letter-spacing: 0; margin-bottom: 26px; }
.hero__t b { font-weight: 800; color: var(--orange); }
html[lang="ko"] .hero__t { font-family: var(--font); font-weight: 300; font-size: clamp(36px, 1.6rem + 2.8vw, 64px); line-height: 1.2; letter-spacing: -0.015em; }
html[lang="ko"] .hero__t b { font-weight: 700; }
.hero__lead { font-size: 18px; color: rgba(255,255,255,.82); max-width: 33em; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero__foot { position: relative; z-index: 2; display: flex; align-items: center; gap: 18px 32px; flex-wrap: wrap; padding-bottom: 28px; padding-right: 120px; }
.hleg { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.hleg__i { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--silver); }
.hleg__i b { font-family: var(--display); font-size: 17px; letter-spacing: .04em; color: #fff; }
.hleg__sw { width: 22px; height: 2px; background: var(--silver); opacity: .7; }
.hleg__i--smallsat .hleg__sw { background: var(--orange); opacity: 1; height: 3px; }
.hero__scale { margin: 0; font-size: 13px; color: var(--steel); }
.hero__pause { display: inline-flex; align-items: center; gap: 8px; height: 40px; padding: 0 16px; border-radius: 100px; border: 1px solid rgba(255,255,255,.35); background: transparent; color: #fff; cursor: pointer; font-size: 14px; font-weight: 600; }
.hero__pause svg { width: 14px; height: 14px; fill: currentColor; }
.hero__pause .i-play { display: none; }
.hero__pause[aria-pressed="true"] .i-play { display: inline; }
.hero__pause[aria-pressed="true"] .i-pause { display: none; }
html:not(.js) .hero__pause { display: none; }

/* ---------- 고도 눈금 띠 ---------- */
.lad { padding: 110px 0 100px; background: var(--paper); }
.lad__scale { position: relative; height: 560px; margin-top: 20px; }
.lad__axis { position: absolute; left: 0; right: 0; top: 50%; height: 2px; background: var(--ink); }
.lad__axis > span:not(.lad__earth):not(.lad__karman):not(.lad__unit) { position: absolute; left: var(--x); top: 10px; transform: translateX(-50%); font-family: var(--display); font-size: 15px; color: var(--muted); }
.lad__axis > span:not(.lad__earth):not(.lad__karman):not(.lad__unit)::before { content: ""; position: absolute; left: 50%; top: -12px; width: 1px; height: 8px; background: var(--ink); }
.lad__unit { position: absolute; right: 0; top: 34px; font-size: 13px; color: var(--muted); }
.lad__earth { position: absolute; left: -8px; top: -46px; width: 8px; height: 92px; border-radius: 0 8px 8px 0; background: var(--ink); }
.lad__karman { position: absolute; left: var(--x); top: -60px; height: 120px; border-left: 1px dashed var(--muted); }
.lad__karman i { position: absolute; left: 8px; top: 0; font-style: normal; font-size: 12px; color: var(--muted); white-space: nowrap; }
.lad__list { position: absolute; inset: 0; }
.lad__m { position: absolute; inset: 0; pointer-events: none; }
.lad__tick { position: absolute; left: var(--x); top: 50%; width: 15px; height: 15px; margin: -7px 0 0 -7px; border-radius: 50%; background: var(--paper); border: 3px solid var(--ink); z-index: 2; }
.lad__m--smallsat .lad__tick { background: var(--orange); border-color: var(--orange); }
.lad__m--ref .lad__tick { border-style: dotted; }
.lad__tick::after { content: ""; position: absolute; left: 50%; width: 1px; background: var(--ink); }
.lad__m:nth-child(odd) .lad__tick::after { bottom: 12px; height: 60px; }
.lad__m:nth-child(even) .lad__tick::after { top: 12px; height: 60px; }
.lad__card { position: absolute; pointer-events: auto; width: 236px; left: clamp(0px, calc(var(--x) - 118px), calc(100% - 236px)); padding: 16px 18px; border-radius: var(--radius); background: var(--mist); }
.lad__m:nth-child(odd) .lad__card { bottom: calc(50% + 74px); }
.lad__m:nth-child(even) .lad__card { top: calc(50% + 74px); }
.lad__m--smallsat .lad__card { background: var(--space); color: #fff; }
.lad__name { margin: 0; font-family: var(--display); font-weight: 800; font-size: 22px; letter-spacing: .03em; line-height: 1.1; }
.lad__alt { margin: 0 0 6px; font-family: var(--display); font-weight: 600; font-size: 40px; line-height: 1; }
.lad__alt small { font-size: 18px; color: var(--muted); }
.lad__m--smallsat .lad__alt small, .lad__m--smallsat .lad__dl dt, .lad__m--smallsat .lad__desc { color: var(--silver); }
.lad__dl { display: grid; grid-template-columns: repeat(3, auto); gap: 4px 14px; margin: 0 0 6px; }
.lad__dl div { display: flex; flex-direction: column-reverse; }
.lad__dl dt { font-size: 11px; color: var(--muted); line-height: 1.3; }
.lad__dl dd { margin: 0; font-family: var(--display); font-size: 20px; font-weight: 600; line-height: 1.1; }
.lad__m--smallsat .lad__dl dd { color: var(--orange); }
.lad__desc { margin: 0; font-size: 13px; color: var(--muted); line-height: 1.45; }

/* ---------- 세 가지 문제 ---------- */
.probs { padding: 100px 0; background: var(--mist); }
.probs__list { border-top: 2px solid var(--ink); }
.prob { display: grid; grid-template-columns: 120px 1fr 120px 200px; gap: 32px; align-items: center; padding: 28px 0; border-bottom: 1px solid #CDD1D8; }
.prob .glyph { width: 120px; height: 120px; color: var(--ink); }
.prob__t { font-size: 26px; font-weight: 700; margin-bottom: 8px; }
html[lang="en"] .prob__t { font-family: var(--display); font-weight: 800; font-size: 32px; letter-spacing: .01em; line-height: 1.05; }
.prob__q { margin: 0; color: #3A404C; max-width: 40em; }
.prob__n { margin: 0; font-size: 15px; color: var(--muted); }
.prob__n .num { display: block; font-family: var(--display); font-weight: 800; font-size: 54px; line-height: 1; color: var(--ink); }
.prob__links { display: grid; gap: 6px; margin: 0; }
.prob__links a { font-weight: 700; text-underline-offset: 4px; }
.prob__links a:first-child { color: var(--orange-ink); }

/* ---------- 계산기 판(메인) ---------- */
.cteaser { padding: 110px 0; background: var(--space); color: #fff; }
.cteaser__in { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 56px; align-items: center; }
.cteaser__t { font-size: clamp(26px, 1.4rem + 1.4vw, 40px); font-weight: 700; margin-bottom: 16px; }
html[lang="en"] .cteaser__t { font-family: var(--display); font-weight: 800; font-size: clamp(34px, 1.6rem + 2vw, 54px); line-height: 1.02; letter-spacing: 0; }
.cteaser__lead { color: rgba(255,255,255,.78); }
.cteaser__dl { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin: 28px 0 32px; background: #262B36; border: 1px solid #262B36; border-radius: 14px; overflow: hidden; }
.cteaser__case { grid-column: 1 / -1; margin: 0; padding: 10px 16px; background: var(--space-3); font-family: var(--display); letter-spacing: .06em; font-size: 16px; color: var(--silver); }
.cteaser__dl div { background: var(--space-2); padding: 14px 16px; }
.cteaser__dl dt { font-size: 13px; color: var(--steel); }
.cteaser__dl dd { margin: 0; }
.cteaser__dl .num { font-family: var(--display); font-weight: 600; font-size: 34px; color: var(--orange); line-height: 1.1; }
.cteaser__dl small { color: var(--silver); font-size: 13px; }
.cteaser__map { margin: 0; }
.cteaser__map figcaption { font-size: 13px; color: var(--steel); margin-top: 10px; }

/* 지상 궤적 지도 */
.gmap { width: 100%; height: auto; border-radius: 14px; background: var(--space-2); }
.gmap__sea { fill: var(--space-2); }
.gmap__grid { stroke: #1D222C; stroke-width: 1; fill: none; }
.gmap__eq { stroke: #343A47; stroke-width: 1; stroke-dasharray: 3 5; }
.gmap__land { fill: #2B303B; stroke: #3B414E; stroke-width: .6; }
.gmap__vis { fill: rgba(255,122,0,.13); stroke: var(--orange); stroke-width: 1; stroke-dasharray: 3 3; }
.gmap__day { fill: none; stroke: var(--silver); stroke-opacity: .32; stroke-width: 1; }
.gmap__rev { fill: none; stroke: var(--orange); stroke-width: 2.4; stroke-linejoin: round; }
.gmap__start { fill: var(--orange); stroke: var(--space); stroke-width: 2; }
.gmap__gs path { fill: #fff; stroke: var(--space); stroke-width: 1.5; }

/* ---------- 논문 기록 ---------- */
.plog { padding: 110px 0; }
.plog__list { border-top: 2px solid var(--ink); }
.plog__i { display: grid; grid-template-columns: 64px 96px 1fr auto; gap: 24px; align-items: baseline; padding: 22px 0; border-bottom: 1px solid var(--line); }
.plog__no { font-family: var(--display); font-weight: 800; font-size: 30px; color: var(--orange-ink); line-height: 1; }
.plog__when { font-family: var(--display); font-size: 20px; color: var(--muted); letter-spacing: .04em; }
.plog__t { margin: 0 0 4px; font-size: 19px; font-weight: 700; line-height: 1.4; }
.plog__t a { text-decoration: none; }
.plog__t a:hover { text-decoration: underline; text-underline-offset: 4px; }
.plog__v { margin: 0; color: var(--muted); font-size: 15px; }

/* ---------- 구성원 명단 ---------- */
.crew { padding: 100px 0; background: var(--mist); }
.crew__in { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 56px; align-items: start; }
.crew__prof { display: grid; grid-template-columns: 120px 1fr; gap: 22px; margin-top: 28px; align-items: start; }
.crew__sil { width: 120px; height: 140px; border-radius: 14px; overflow: hidden; }
.crew__role { margin: 0; font-size: 14px; color: var(--orange-ink); font-weight: 700; }
.crew__name { margin: 0 0 6px; font-size: 26px; font-weight: 700; line-height: 1.2; }
.crew__line { color: #3A404C; font-size: 16px; }
.crew__links { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0; }
.crew__links a { font-weight: 700; text-underline-offset: 4px; }
.crew__t { width: 100%; border-collapse: collapse; }
.crew__t caption { text-align: left; font-size: 14px; color: var(--muted); padding-bottom: 10px; caption-side: top; }
.crew__t th, .crew__t td { text-align: left; vertical-align: top; padding: 16px 12px 16px 0; border-top: 1px solid #CDD1D8; }
.crew__t tr:first-child th, .crew__t tr:first-child td { border-top: 2px solid var(--ink); }
.crew__t th { font-weight: 700; width: 34%; }
.crew__t td.num { font-family: var(--display); font-weight: 800; font-size: 28px; line-height: 1; width: 48px; }
.crew__names { display: flex; flex-wrap: wrap; gap: 4px 16px; }
.crew__names li { display: inline-flex; align-items: center; gap: 6px; }
.crew__key { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 16px; font-size: 14px; color: var(--muted); }
.crew__key li { display: inline-flex; align-items: center; gap: 6px; }

/* ---------- 공지·소식 ---------- */
.log { padding: 110px 0 90px; }
.log__cols { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.log__h { font-size: 20px; font-weight: 700; padding-bottom: 12px; border-bottom: 2px solid var(--ink); margin-bottom: 4px; }
.nlist li { display: grid; grid-template-columns: auto auto 1fr; gap: 6px 14px; align-items: baseline; padding: 14px 0; border-bottom: 1px solid var(--line); }
.nlist time { font-size: 14px; color: var(--muted); white-space: nowrap; }
.nlist__c { font-size: 12px; font-weight: 700; color: var(--orange-ink); white-space: nowrap; }
.nlist a { font-weight: 600; text-decoration: none; }
.nlist a:hover { text-decoration: underline; text-underline-offset: 4px; }
.ncards { display: grid; gap: 14px; margin-top: 14px; }
.ncard { display: grid; grid-template-columns: 150px 1fr; gap: 16px; align-items: center; }
.nart { width: 100%; height: auto; border-radius: 10px; }
.ncard time { font-size: 13px; color: var(--muted); }
.ncard__t { margin: 2px 0 0; font-weight: 700; line-height: 1.4; }
.ncard__t a { text-decoration: none; }
.ncard__t a:hover { text-decoration: underline; }
.cband { padding: 80px 0 90px; border-top: 1px solid var(--line); }
.cband__in { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; flex-wrap: wrap; }
.cband__t { max-width: 22em; font-size: clamp(24px, 1.2rem + 1.2vw, 36px); font-weight: 700; }
html[lang="en"] .cband__t { font-family: var(--display); font-weight: 800; font-size: clamp(32px, 1.4rem + 2vw, 52px); line-height: 1.02; letter-spacing: 0; }
.cband__cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 0; }
.cband .btn--line { color: var(--ink); }
.cband .btn--line:hover { background: var(--mist); }

/* ---------- 푸터 ---------- */
.foot { background: var(--space); color: var(--silver); padding: 64px 0 120px; font-size: 15px; }
.foot__in { display: grid; grid-template-columns: 1fr 1.3fr; gap: 40px; }
.logo--foot { color: #fff; margin: 0 0 10px; }
.foot__sub { color: var(--steel); max-width: 30em; }
.foot__info { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 28px; margin: 0; }
.foot__info dt { font-size: 12px; color: var(--steel); }
.foot__info dd { margin: 0; color: #fff; }
.foot__bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 44px; padding-top: 20px; border-top: 1px solid #1F232C; font-size: 13px; color: var(--steel); }
.foot__bottom p { margin: 0; }
.foot__credit { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.credit-link { display: inline-flex; align-items: center; gap: 6px; color: #fff; text-decoration: none; }
.credit-link img { filter: brightness(0) invert(1); opacity: .9; }

/* ---------- 서브 머리: 궤도 호가 지나는 검은 띠 + 아래로 잘린 초대형 그룹명 ---------- */
.shead { position: relative; overflow: hidden; background: var(--space); color: #fff; min-height: 330px; padding-top: 92px; }
.shead__arc { position: absolute; inset: 0; width: 100%; height: 100%; color: var(--silver); }
.shead__in { position: relative; z-index: 1; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 24px; }
.crumb ol { display: flex; flex-wrap: wrap; gap: 4px 0; font-size: 14px; color: var(--silver); }
.crumb li + li::before { content: "/"; margin: 0 10px; opacity: .5; }
.crumb a { text-decoration: none; }
.crumb a:hover { text-decoration: underline; }
.crumb [aria-current] { color: #fff; }
.shead__seq { margin-left: auto; font-family: var(--display); font-size: 18px; letter-spacing: .06em; color: var(--silver); text-decoration: none; border: 1px solid #3A404D; border-radius: 100px; padding: 4px 14px; }
.shead__seq b { color: var(--orange); font-weight: 800; }
.shead__seq:hover { border-color: var(--silver); }
.shead__ko { width: 100%; margin: 10px 0 0; font-size: 18px; font-weight: 700; color: #fff; }
.shead__big {
  position: absolute; left: calc(var(--gut) - .04em); right: 0; bottom: -.2em; margin: 0; z-index: 1;
  font-family: var(--display); font-weight: 800; text-transform: uppercase; letter-spacing: -.01em; line-height: .8;
  font-size: clamp(92px, 2rem + 13vw, 248px); color: var(--silver); white-space: nowrap; pointer-events: none;
}
@media (min-width: 1328px) { .shead__big { left: calc((100vw - 1280px) / 2 + var(--gut) - .04em); } }
.shead--research .shead__big { color: #fff; }
.ptitle { padding-top: 56px; padding-bottom: 34px; }
.ptitle h1 { font-size: clamp(30px, 1.4rem + 1.8vw, 46px); font-weight: 700; }
html[lang="en"] .ptitle h1 { font-family: var(--display); font-weight: 800; font-size: clamp(40px, 1.8rem + 2.6vw, 72px); line-height: 1; letter-spacing: 0; }
.ptitle__desc { margin: 14px 0 0; font-size: 19px; color: var(--muted); max-width: 40em; }
.updated { display: inline-flex; align-items: center; gap: 8px; margin: 14px 0 0; font-size: 14px; color: var(--muted); }
.updated::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--orange); }
.page { padding-bottom: 72px; }

/* ---------- 2차 메뉴: 형제 목록 + 이전/다음 ---------- */
.pager-wrap { padding-top: 8px; padding-bottom: 96px; }
.sib { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; padding: 18px 0; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--line); scroll-margin-top: 90px; }
.sib__g { margin: 0; font-family: var(--display); font-weight: 800; font-size: 22px; text-transform: uppercase; letter-spacing: .03em; }
.sib__g small { font-family: var(--font); font-size: 14px; font-weight: 600; text-transform: none; color: var(--muted); letter-spacing: 0; }
.sib ol { display: flex; flex-wrap: wrap; gap: 8px; }
.sib a { display: inline-flex; align-items: center; gap: 8px; min-height: 40px; padding: 4px 14px 4px 6px; border-radius: 100px; background: var(--mist); text-decoration: none; font-size: 15px; font-weight: 600; transition: background-color .2s; }
.sib a:hover { background: var(--line); }
.sib__n { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--paper); font-family: var(--display); font-weight: 800; font-size: 15px; }
.sib a[aria-current="page"] { background: var(--space); color: #fff; }
.sib a[aria-current="page"] .sib__n { background: var(--orange); color: var(--space); }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.pager__card { position: relative; display: grid; gap: 4px; padding: 24px 28px 26px; border-radius: var(--radius); background: var(--space); color: #fff; text-decoration: none; min-height: 128px; transition: background-color .2s; }
.pager__card:hover { background: #1A1E27; }
.pager__card--next { text-align: right; }
.pager__k { font-size: 13px; color: var(--steel); }
.pager__t { font-size: 22px; font-weight: 700; line-height: 1.25; }
html[lang="en"] .pager__t { font-family: var(--display); font-weight: 800; font-size: 30px; line-height: 1.05; }
.pager__arrow { font-size: 26px; color: var(--orange); line-height: 1; }
.pager__card--prev .pager__arrow { order: -1; }
.pager__gap { display: block; }

/* ---------- 서브 본문 ---------- */
.prose-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, .9fr); gap: 56px; align-items: start; }
.prose { max-width: 40em; }
.sign { font-weight: 700; margin-top: 28px; }
.facts { background: var(--space); color: #fff; border-radius: var(--radius); padding: 28px; position: sticky; top: 80px; }
.facts__t { font-size: 20px; font-weight: 700; margin-bottom: 14px; }
html[lang="en"] .facts__t { font-family: var(--display); font-weight: 800; font-size: 26px; }
.facts dl { margin: 0; display: grid; gap: 0; }
.facts dl div { display: grid; grid-template-columns: 130px 1fr; gap: 12px; padding: 10px 0; border-top: 1px solid #262B36; }
.facts dt { color: var(--steel); font-size: 14px; }
.facts dd { margin: 0; font-size: 15px; }
.facts .fine { color: var(--steel); }
.tl { margin-top: 72px; }
.tl__list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; border-top: 2px solid var(--ink); }
.tl__list li { position: relative; padding: 22px 18px 0 0; }
.tl__list li::before { content: ""; position: absolute; top: -8px; left: 0; width: 14px; height: 14px; border-radius: 50%; background: var(--paper); border: 3px solid var(--ink); }
.tl__list li:nth-child(4)::before { background: var(--orange); border-color: var(--orange); }
.tl__y { display: block; font-family: var(--display); font-weight: 800; font-size: 34px; line-height: 1; margin-bottom: 8px; }
.tl__list p { font-size: 15px; color: #3A404C; margin: 0; }

.kv { display: grid; gap: 0; margin: 0; }
.kv div { display: grid; grid-template-columns: 120px 1fr; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.kv dt { color: var(--muted); font-size: 15px; }
.kv dd { margin: 0; }
.kv--tight div { grid-template-columns: 70px 1fr; padding: 8px 0; font-size: 15px; }
.loc { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 48px; align-items: start; }
.loc__map { margin: 0; }
.cmap { width: 100%; height: auto; border-radius: var(--radius); }
.contact { margin-top: 72px; scroll-margin-top: 80px; }
.mailbox { margin-top: 20px; padding: 28px; border-radius: var(--radius); background: var(--mist); display: grid; grid-template-columns: 140px 1fr; gap: 12px 20px; align-items: center; }
.mailbox__k { margin: 0; font-size: 14px; color: var(--muted); }
.mailbox__v { margin: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-weight: 600; }
.mailbox__v code { font-family: var(--font); background: var(--paper); padding: 4px 10px; border-radius: 8px; }
.mailbox__list { grid-column: 1 / -1; display: grid; gap: 6px; margin-top: 8px; font-size: 15px; }
.copy { border: 1px solid var(--ink); background: var(--paper); border-radius: 100px; padding: 4px 14px; font-size: 13px; font-weight: 700; cursor: pointer; }
.copy.is-done { background: var(--ink); color: #fff; }

.prof { display: grid; grid-template-columns: 300px 1fr; gap: 56px; align-items: start; }
.prof__card { position: sticky; top: 80px; }
.prof__sil { width: 100%; height: auto; border-radius: var(--radius); }
.prof__name { margin: 18px 0 2px; font-size: 26px; font-weight: 700; }
html[lang="en"] .prof__name { font-family: var(--display); font-weight: 800; font-size: 34px; }
.prof__name span { font-size: 16px; color: var(--muted); font-weight: 500; font-family: var(--display); }
.prof__role { color: var(--orange-ink); font-weight: 700; font-size: 15px; }
.prof__body section { margin-top: 40px; }
.cv li { display: grid; grid-template-columns: 110px 1fr; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.cv li > span { font-family: var(--display); font-size: 20px; font-weight: 600; }
.cv p { margin: 0; }
.bul { list-style: none; display: grid; gap: 8px; }
.bul li { padding-left: 20px; position: relative; }
.bul li::before { content: ""; position: absolute; left: 0; top: .72em; width: 8px; height: 2px; background: var(--orange); }

.pos { margin-bottom: 56px; }
.pos__t { font-size: 22px; font-weight: 700; padding-bottom: 12px; border-bottom: 2px solid var(--ink); margin-bottom: 20px; display: flex; align-items: baseline; gap: 12px; }
html[lang="en"] .pos__t { font-family: var(--display); font-weight: 800; font-size: 30px; }
.pos__t .num { font-family: var(--display); color: var(--orange-ink); }
.badges { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.badge { display: grid; gap: 4px; padding: 22px; border-radius: var(--radius); background: var(--mist); }
.badge__ring { display: grid; place-items: center; width: 64px; height: 64px; border-radius: 50%; border: 2px solid var(--t-smallsat); margin-bottom: 10px; position: relative; }
.badge--debris .badge__ring { border-color: var(--t-debris); }
.badge--constellation .badge__ring { border-color: var(--t-constellation); }
.badge__ring::after { content: ""; position: absolute; right: -2px; top: 4px; width: 12px; height: 12px; border-radius: 50%; background: var(--t-smallsat); border: 2px solid var(--mist); }
.badge--debris .badge__ring::after { background: var(--t-debris); }
.badge--constellation .badge__ring::after { background: var(--t-constellation); }
.badge__ring span { font-family: var(--display); font-weight: 800; font-size: 24px; }
.badge__name { margin: 0; font-weight: 700; font-size: 18px; line-height: 1.3; }
.badge__name span { font-weight: 500; color: var(--muted); font-size: 15px; }
.badge__topic { margin: 0; font-size: 15px; color: #3A404C; line-height: 1.5; }
.badge__meta { display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 6px 0 0; font-size: 13px; color: var(--muted); }
.badge__mail { font-size: 14px; color: var(--orange-ink); font-weight: 600; }

.tablewrap { overflow-x: auto; }
.dtable { width: 100%; border-collapse: collapse; font-size: 16px; }
.dtable th, .dtable td { text-align: left; padding: 14px 16px 14px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.dtable thead th { font-size: 13px; color: var(--muted); font-weight: 700; border-bottom: 2px solid var(--ink); }
.dtable tbody th { font-weight: 700; }
.dtable--kv th { width: 180px; }
.board td:first-child { width: 64px; color: var(--muted); }
.board td:last-child { white-space: nowrap; color: var(--muted); }
.board th a { text-decoration: none; }
.board th a:hover { text-decoration: underline; }
.cat { font-size: 12px; font-weight: 700; color: var(--orange-ink); white-space: nowrap; }

.ovs { border-top: 2px solid var(--ink); }
.ov { display: grid; grid-template-columns: 140px 1fr; gap: 36px; padding: 36px 0; border-bottom: 1px solid var(--line); align-items: center; }
.ov .glyph { width: 140px; height: 140px; color: var(--ink); }
.ov__t { font-size: 26px; margin-bottom: 10px; }
html[lang="en"] .ov__t { font-family: var(--display); font-weight: 800; font-size: 34px; line-height: 1.05; }
.ov__t a { text-decoration: none; }
.ov__t a:hover { text-decoration: underline; text-underline-offset: 5px; }
.ov__meta { margin: 0; font-size: 15px; color: var(--muted); }
.ov__meta a { color: var(--orange-ink); font-weight: 700; }
.facil { margin-top: 64px; }
.facil__list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.facil__list li { padding: 24px; background: var(--space); color: #fff; border-radius: var(--radius); }
.facil__list h3 { font-size: 19px; margin-bottom: 8px; }
html[lang="en"] .facil__list h3 { font-family: var(--display); font-weight: 800; font-size: 24px; }
.facil__list p { margin: 0; color: var(--silver); font-size: 15px; }
.tocalc { margin-top: 40px; }

.topic > section { margin-top: 56px; }
.topic__fig { margin: 0; }
.tfig { width: 100%; height: auto; border-radius: var(--radius); }
.topic__fig figcaption { margin-top: 10px; font-size: 14px; color: var(--muted); }
.topic__q .lead { max-width: 38em; }
.pubs--short { border-top: 1px solid var(--line); }
.plist { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 8px 24px; }
.plist li { display: grid; grid-template-columns: auto 1fr; align-items: baseline; gap: 2px 10px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.plist small { grid-column: 2; color: var(--muted); font-size: 14px; line-height: 1.4; }
.others { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.others a { display: flex; align-items: center; gap: 18px; padding: 18px 22px; background: var(--mist); border-radius: var(--radius); text-decoration: none; font-weight: 700; font-size: 18px; }
.others .glyph { width: 64px; height: 64px; color: var(--ink); flex: none; }
.others a:hover { background: var(--line); }

.ncards--grid { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 28px; }
.ncard--big { grid-template-columns: 1fr; align-items: start; }
.ncard__c { margin: 6px 0 4px; font-size: 13px; color: var(--orange-ink); font-weight: 700; }
.ncard--big h2 { font-size: 22px; margin-bottom: 8px; }
html[lang="en"] .ncard--big h2 { font-family: var(--display); font-weight: 800; font-size: 28px; line-height: 1.05; }
.ncard--big p:last-child { color: #3A404C; font-size: 16px; }

/* ---------- 논문 목록 ---------- */
.publist { position: relative; }
.ptabs { display: flex; flex-wrap: wrap; gap: 0; border: 2px solid var(--ink); border-radius: 100px; padding: 4px; width: fit-content; max-width: 100%; }
.ptabs button { border: 0; background: none; padding: 9px 18px; border-radius: 100px; font-weight: 700; font-size: 15px; cursor: pointer; color: var(--ink); }
.ptabs button b { font-family: var(--display); font-weight: 800; margin-left: 2px; color: var(--muted); }
.ptabs button[aria-pressed="true"] { background: var(--space); color: #fff; }
.ptabs button[aria-pressed="true"] b { color: var(--orange); }
.autonote { margin-bottom: 20px; }
.pubtools { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px 24px; margin: 20px 0 10px; }
.tchips { display: flex; flex-wrap: wrap; gap: 8px; }
.tchip { display: inline-flex; align-items: center; gap: 7px; border: 1px solid var(--line); background: var(--paper); border-radius: 100px; padding: 7px 14px; font-size: 14px; font-weight: 600; cursor: pointer; }
.tchip i { width: 9px; height: 9px; border-radius: 50%; background: var(--t-smallsat); }
.tchip--debris i { background: var(--t-debris); }
.tchip--constellation i { background: var(--t-constellation); }
.tchip[aria-pressed="true"] { border-color: var(--ink); background: var(--ink); color: #fff; }
.psearch input { width: min(340px, 100%); height: 46px; padding: 0 16px; border: 1px solid #C3C8D0; border-radius: 100px; font: inherit; font-size: 16px; }
.pubcount { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 14px; color: var(--muted); padding-bottom: 14px; border-bottom: 2px solid var(--ink); margin: 0; }
.pubcount [data-pub-count] { font-weight: 700; color: var(--ink); }
.publist__body { display: grid; grid-template-columns: 150px 1fr; gap: 40px; margin-top: 24px; }
.yidx { position: sticky; top: 76px; align-self: start; }
.yidx__t { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.yidx ul { display: grid; gap: 2px; }
.yidx a { display: flex; justify-content: space-between; align-items: baseline; padding: 6px 12px; border-radius: 10px; text-decoration: none; }
.yidx__y { font-family: var(--display); font-weight: 800; font-size: 22px; }
.yidx b { font-size: 13px; color: var(--muted); }
.yidx a.is-active, .yidx a[aria-current] { background: var(--space); color: #fff; }
.yidx a.is-active b { color: var(--orange); }
.ygroup { scroll-margin-top: 76px; margin-bottom: 40px; }
.ygroup__head { display: flex; align-items: baseline; gap: 14px; padding-bottom: 8px; border-bottom: 1px solid var(--ink); }
.ygroup__year { font-family: var(--display); font-weight: 800; font-size: 46px; line-height: 1; }
.ygroup__count { font-size: 15px; color: var(--muted); font-weight: 600; }
.pub { display: grid; grid-template-columns: 52px 1fr; gap: 16px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.pub__no { font-family: var(--display); font-weight: 800; font-size: 26px; color: var(--orange-ink); line-height: 1.2; }
.pub__title { margin: 0 0 6px; font-size: 19px; font-weight: 700; line-height: 1.4; }
.pub__link { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 5px; }
.pub__link:hover { text-decoration-color: var(--orange); text-decoration-thickness: 2px; }
.pub__authors, .pub__venue { margin: 0; font-size: 15px; color: #3A404C; line-height: 1.55; }
.pub__authors b { color: var(--ink); }
.pub__foot { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 10px; margin-top: 10px; }
.pub__tags { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; margin: 0; }
.pub__files { display: flex; gap: 8px; margin: 0; }
.fbtn { display: inline-flex; align-items: center; gap: 6px; padding: 5px 13px; border: 1px solid #B9BFC8; border-radius: 100px; font-size: 13px; font-weight: 700; text-decoration: none; letter-spacing: .04em; }
.fbtn svg { width: 15px; height: 15px; }
.fbtn:hover { border-color: var(--ink); background: var(--mist); }
.empty { padding: 40px 0; text-align: center; color: var(--muted); }
.publist.is-fading .ygroups { opacity: .25; }
.ygroups { transition: opacity .18s; }

/* ---------- 과제 ---------- */
.bigtabs { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 1px solid var(--line); margin-bottom: 28px; }
.bigtabs a { padding: 18px 8px 16px; text-align: center; font-family: var(--display); font-weight: 800; font-size: 30px; text-decoration: none; color: var(--muted); border-bottom: 4px solid transparent; margin-bottom: -1px; }
.bigtabs a b { font-size: 20px; color: inherit; margin-left: 4px; }
.bigtabs a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--orange); }
.ychips { display: flex; flex-wrap: wrap; gap: 8px; }
.ychip { border: 1px solid var(--line); background: var(--paper); border-radius: 100px; padding: 7px 16px; font-family: var(--display); font-weight: 600; font-size: 17px; cursor: pointer; }
.ychip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: #fff; }
.projtotal { margin: 20px 0 8px; font-size: 15px; color: var(--muted); }
.projtotal b { color: var(--ink); font-size: 18px; }
.pgroup { margin-bottom: 36px; }
.pgroup__head { display: flex; align-items: baseline; gap: 12px; padding-bottom: 8px; border-bottom: 2px solid var(--ink); }
.pgroup__head span { font-family: var(--display); font-weight: 800; font-size: 40px; line-height: 1; }
.pgroup__head small { font-size: 14px; color: var(--muted); }
.proj { display: grid; grid-template-columns: 40px 1fr auto; gap: 16px; align-items: start; padding: 20px 0; border-bottom: 1px solid var(--line); }
.proj__no { font-family: var(--display); font-weight: 600; font-size: 18px; color: var(--muted); }
.proj__name { margin: 0 0 8px; font-weight: 700; font-size: 18px; line-height: 1.4; }
.proj__meta { display: flex; flex-wrap: wrap; gap: 4px 24px; margin: 0; font-size: 14px; }
.proj__meta div { display: flex; gap: 8px; }
.proj__meta dt { color: var(--muted); }
.proj__meta dd { margin: 0; }
.proj__meta .num { font-family: var(--display); font-size: 16px; letter-spacing: .03em; }

/* ---------- 궤도 계산기 ---------- */
.calc__badge { display: inline-block; padding: 10px 16px; border-radius: 12px; background: #FFF1E3; color: #6B3200; font-size: 15px; margin-bottom: 28px; }
.calc__badge span:first-child { font-weight: 800; }
.calc__badge span[lang="ko"] { font-weight: 700; }
.calc__grid { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 32px; align-items: start; }
.calc__ctl { padding: 28px; border-radius: var(--radius); background: var(--space); color: #fff; position: sticky; top: 72px; }
.calc__ctl .h2 { color: #fff; }
.field { margin-bottom: 24px; }
.field label { display: flex; justify-content: space-between; align-items: baseline; font-weight: 600; font-size: 15px; color: var(--silver); }
.field label output { font-family: var(--display); font-weight: 800; font-size: 40px; color: var(--orange); line-height: 1; margin-left: auto; margin-right: 6px; }
.field input[type="range"] { width: 100%; margin: 10px 0 4px; accent-color: var(--orange); height: 28px; }
.field__ends { display: flex; justify-content: space-between; font-size: 12px; color: var(--steel); }
.calc__sso { font-size: 15px; color: var(--silver); padding: 12px 0; border-top: 1px solid #262B36; border-bottom: 1px solid #262B36; }
.calc__sso b { color: #fff; font-family: var(--display); font-size: 20px; }
.calc__ctl .linkbtn { color: var(--orange); margin-left: 6px; }
.presets { border: 0; padding: 0; margin: 18px 0 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.presets legend { font-size: 13px; color: var(--steel); margin-bottom: 8px; padding: 0; }
.preset { display: grid; text-align: left; gap: 0; padding: 10px 14px; border-radius: 12px; border: 1px solid #2F3541; background: var(--space-2); color: #fff; font-family: var(--display); font-weight: 800; font-size: 18px; letter-spacing: .03em; cursor: pointer; line-height: 1.2; transition: border-color .2s, background-color .2s; }
.preset small { font-weight: 400; font-size: 14px; color: var(--steel); letter-spacing: .02em; }
.preset[aria-pressed="true"] { border-color: var(--orange); background: #1A120A; }
.preset:hover { border-color: var(--silver); }
.calc__ctl .fine { color: var(--steel); }
.calc__ctl code { font-family: var(--font); color: #fff; }
.res { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; margin: 0; border-top: 2px solid var(--ink); }
.res__i { padding: 18px 16px 18px 0; border-bottom: 1px solid var(--line); }
.res__i:nth-child(even) { padding-left: 16px; border-left: 1px solid var(--line); }
.res__i--big { grid-column: 1 / -1; padding-left: 0 !important; border-left: 0 !important; }
.res dt { font-size: 14px; color: var(--muted); font-weight: 600; }
.res dd { margin: 0; }
.res output { font-family: var(--display); font-weight: 800; font-size: 40px; line-height: 1.05; }
.res__i--big output { font-size: 96px; color: var(--orange-ink); line-height: .95; }
.res small { font-size: 15px; color: var(--muted); }
.res__f { margin: 4px 0 0; font-size: 13px; color: var(--muted); font-family: var(--display); letter-spacing: .02em; }
/* 국문 쪽: 압축 영문 글꼴·넓은 자간을 한글에 쓰지 않는다 */
html[lang="ko"] .res__f, html[lang="ko"] .preset { font-family: var(--font); letter-spacing: 0; }
html[lang="ko"] .preset { font-weight: 700; font-size: 16px; }
html[lang="ko"] .preset small, html[lang="ko"] .preset b { letter-spacing: 0; }
html[lang="ko"] .bigtabs a { font-family: var(--font); font-size: 24px; }
html[lang="ko"] .bigtabs a b { font-family: var(--display); font-size: 22px; }
html[lang="ko"] .ychip { font-family: var(--font); font-size: 15px; }
html[lang="ko"] .ychip[data-year=""] { font-weight: 700; }
.res.is-calc output { opacity: .6; }
.calc__map { margin: 40px 0 0; }
.calc__map figcaption { display: flex; flex-wrap: wrap; gap: 6px 20px; margin-top: 12px; font-size: 14px; color: var(--muted); }
.lg { display: inline-flex; align-items: center; gap: 8px; }
.lg::before { content: ""; width: 18px; height: 3px; background: var(--steel); }
.lg--rev::before { background: var(--orange); }
.lg--day::before { background: #9AA1AE; height: 1px; }
.lg--vis::before { height: 12px; width: 12px; border-radius: 50%; border: 1px dashed var(--orange); background: rgba(255,122,0,.13); }
.lg--gs::before { width: 0; height: 0; border-left: 6px solid transparent; border-right: 6px solid transparent; border-bottom: 11px solid var(--ink); background: none; }
.calc__how { margin-top: 32px; padding: 20px 24px; border-radius: var(--radius); background: var(--mist); }
.calc__how summary { cursor: pointer; font-weight: 700; }
.calc__how .kv { margin: 16px 0; }
.calc__how p { margin: 0; font-size: 15px; color: #3A404C; }

/* ---------- 넓은 화면 아닌 경우 ---------- */
@media (max-width: 1100px) {
  .prob { grid-template-columns: 100px 1fr 120px; }
  .prob .glyph { width: 100px; height: 100px; }
  .prob__links { grid-column: 2 / -1; display: flex; gap: 20px; }
  .pmenu__g { font-size: 30px; }
}
@media (max-width: 960px) {
  .strip__utc { display: none; }
  .tdots__t { display: none; }
  .tdots a { padding: 8px 5px; }
  .hero { display: block; min-height: 0; }
  .hero__stage { position: relative; right: auto; width: 100%; height: min(92vw, 560px); margin-top: 52px; }
  .hero__copy { padding-top: 0; margin-top: -24px; }
  .hero__copy > * { max-width: none; }
  .hero__foot { padding-top: 24px; padding-right: 100px; }
  .sechead--row { grid-template-columns: 1fr; row-gap: 12px; }
  .cteaser__in, .crew__in, .log__cols, .prose-grid, .loc, .prof, .calc__grid, .foot__in { grid-template-columns: 1fr; gap: 40px; }
  .facts, .prof__card, .calc__ctl { position: static; }
  .prof__card { max-width: 420px; display: grid; grid-template-columns: 140px 1fr; gap: 0 20px; align-items: start; }
  .prof__card .prof__sil { grid-row: span 3; }
  .prof__card .prof__name { margin-top: 0; }
  .prof__card .kv { grid-column: 1 / -1; margin-top: 16px; }
  .publist__body { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .yidx, .ygroups { min-width: 0; }
  .yidx { position: sticky; top: 52px; z-index: 5; background: var(--paper); padding: 8px 0; margin-inline: calc(var(--gut) * -1); padding-inline: var(--gut); border-bottom: 1px solid var(--line); }
  .yidx__t { display: none; }
  .yidx ul { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; }
  .yidx a { gap: 8px; white-space: nowrap; border: 1px solid var(--line); border-radius: 100px; padding: 4px 12px; }
  .yidx__y { font-size: 18px; }
  .tl__list { grid-template-columns: 1fr; border-top: 0; border-left: 2px solid var(--ink); margin-left: 7px; }
  .tl__list li { padding: 0 0 26px 26px; }
  .tl__list li::before { top: 4px; left: -8px; }
  .facil__list { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  :root { --gut: 16px; }
  body { font-size: 16px; }
  .strip__in { gap: 12px; height: 48px; }
  .logo__t { font-size: 20px; }
  .strip__where { display: none; }
  .tdots { display: none; }
  .lang { margin-left: auto; }
  .orb { width: 64px; height: 64px; right: 14px; bottom: calc(14px + env(safe-area-inset-bottom)); }
  .orb__ring { width: 26px; height: 12px; }
  .orb__t { font-size: 13px; }
  html[lang="ko"] .orb__t { font-size: 12px; }
  .pmenu { inset: var(--sample-banner-h, 0px) 0 0 0; width: auto; max-height: none; border-radius: 0; border: 0; clip-path: circle(0 at calc(100% - 46px) calc(100% - 46px)); }
  .pmenu.is-open { clip-path: circle(160% at calc(100% - 46px) calc(100% - 46px)); }
  .pmenu__in { padding: 28px 20px 110px; }
  .pmenu__groups { grid-template-columns: 1fr 1fr; gap: 24px 16px; }
  .pmenu__g { font-size: 26px; }
  .pmenu__group li a { font-size: 15px; padding: 6px 0; }
  .pmenu__foot { padding-right: 70px; }
  .hero__stage { height: 100vw; margin-top: 44px; }
  .hero__t { font-size: clamp(44px, 12vw, 64px); }
  html[lang="ko"] .hero__t { font-size: clamp(32px, 8.6vw, 42px); }
  .hero__lead { font-size: 16px; }
  .hero__cta .btn { flex: 1 1 auto; justify-content: center; }
  .hero__foot { padding-right: 84px; gap: 12px 20px; }
  .lad { padding: 72px 0; }
  .lad__scale { height: auto; margin-top: 8px; }
  .lad__axis { display: none; }
  .lad__list { position: static; display: grid; gap: 12px; }
  .lad__m { position: relative; inset: auto; pointer-events: auto; padding-top: 18px; }
  .lad__m::before { content: ""; position: absolute; left: 0; top: 6px; width: var(--x); height: 4px; border-radius: 4px; background: var(--ink); }
  .lad__m--smallsat::before { background: var(--orange); }
  .lad__tick { top: 8px; left: var(--x); }
  .lad__tick::after { display: none; }
  .lad__card { position: static; width: auto; }
  .lad__m:nth-child(n) .lad__card { top: auto; bottom: auto; }
  .probs, .cteaser, .plog, .crew, .log { padding: 72px 0; }
  .prob { grid-template-columns: 72px 1fr; gap: 14px 18px; padding: 24px 0; }
  .prob .glyph { width: 72px; height: 72px; }
  .prob__n { grid-column: 2; }
  .prob__n .num { display: inline; font-size: 26px; margin-right: 4px; }
  .prob__links { grid-column: 1 / -1; }
  .plog__i { grid-template-columns: 44px 1fr; gap: 4px 14px; }
  .plog__when { grid-column: 2; grid-row: 1; font-size: 16px; }
  .plog__no { grid-row: 1 / span 3; font-size: 24px; }
  .plog__body { grid-column: 2; }
  .plog__i .ptype { grid-column: 2; justify-self: start; }
  .plog__t { font-size: 17px; }
  .cteaser__dl .num { font-size: 28px; }
  .crew__prof { grid-template-columns: 96px 1fr; }
  .crew__sil { width: 96px; height: 112px; }
  .crew__t th { width: auto; }
  .crew__t tr { display: grid; grid-template-columns: 1fr auto; }
  .crew__t td:last-child { grid-column: 1 / -1; padding-top: 0; border-top: 0; }
  .ncard { grid-template-columns: 112px 1fr; }
  .cband__in { flex-direction: column; align-items: flex-start; }
  .foot__info { grid-template-columns: 1fr; }
  .foot { padding-bottom: 110px; }
  .shead { min-height: 220px; padding-top: 70px; }
  .shead__big { font-size: clamp(64px, 21vw, 120px); }
  .shead__seq { margin-left: 0; }
  .ptitle { padding-top: 36px; padding-bottom: 24px; }
  .ptitle__desc { font-size: 17px; }
  .pager { grid-template-columns: 1fr; }
  .pager__card--next { text-align: left; }
  .pager__gap { display: none; }
  .pager-wrap { padding-bottom: 104px; }
  .badges { grid-template-columns: 1fr; }
  .mailbox { grid-template-columns: 1fr; gap: 4px; }
  .mailbox__v + .mailbox__k { margin-top: 10px; }
  .others { grid-template-columns: 1fr; }
  .ov { grid-template-columns: 1fr; gap: 12px; padding: 28px 0; }
  .ov .glyph { width: 96px; height: 96px; }
  .ptabs { border-radius: 16px; }
  .ptabs button { padding: 8px 12px; font-size: 14px; }
  .psearch, .psearch input { width: 100%; }
  .pub { grid-template-columns: 40px 1fr; gap: 10px; }
  .pub__no { font-size: 21px; }
  .pub__title { font-size: 17px; }
  .proj { grid-template-columns: 30px 1fr; }
  .proj .tag { grid-column: 2; }
  .bigtabs a { font-size: 24px; }
  .dtable { font-size: 15px; }
  .alumni-t td:nth-child(3) { min-width: 220px; }
  .res { grid-template-columns: 1fr; }
  .res__i:nth-child(even) { padding-left: 0; border-left: 0; }
  .res__i--big output { font-size: 72px; }
  .calc__ctl { padding: 22px 18px; }
  .kv div { grid-template-columns: 96px 1fr; }
  .cv li { grid-template-columns: 90px 1fr; }
  .facts dl div { grid-template-columns: 110px 1fr; }
}

/* ---------- 동작 줄이기 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .btn, a, .tchip, .ychip, .preset, .ygroups { transition-duration: .2s !important; }
  .pmenu { transition: opacity .2s !important; clip-path: none !important; opacity: 0; }
  .pmenu.is-open { opacity: 1; }
}
html.no-motion .pmenu { transition: opacity .2s; clip-path: none; opacity: 0; }
html.no-motion .pmenu.is-open { opacity: 1; }