/* 공통 스타일: 홈·허브 13곳이 </head> 직전에서 불러온다(페이지 자체 <style>보다 나중에 적용됨).
   다크 모드(OS 설정을 따름)와 2026-10 리뉴얼 공통 스타일(카드·제목·푸터·히어로)을 담고 있다. 색은 각 페이지의 :root 변수(--bg 등)를 덮어써서 바꾼다. */
:root { color-scheme: light dark; --nav-bg: rgba(255,255,255,.96); --nav-hover: #eef4fd; }
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1620; --panel: #18222f; --ink: #e6edf5; --sub: #9aabbd;
    --accent: #5aa2ff; --ok: #4fd08a; --border: #2a3647;
    --nav-bg: rgba(24,34,47,.96); --nav-hover: #1f2d42;
  }
  /* 페이지마다 색을 직접 쓴 부분 */
  .pill.done, .badge.done { background: #173826; color: #6fe0a0; }
  .pill.wip, .badge.wip { background: #3a2d12; color: #f0b44c; }
  .pill.tag { background: #243040; color: var(--sub); }
  .badge.cp { background: #2b2552; color: #b8a9ff; }
  .card .tag, code, kbd { background: #243040; color: var(--ink); }
  .card .thumb { background: #1d2836; border-color: var(--border); }
  .card:hover { box-shadow: 0 8px 22px rgba(0,0,0,.45); }
  .card.disabled .thumb { filter: grayscale(1); }
  .assignment-banner { background: linear-gradient(135deg, #1b5bb0, #0f2d5c); }
}

/* ── 2026-10 리뉴얼: 공통 정돈 ─────────────────────────────── */
:root { --ray: #ff9a1a; --ray2: #ffc233; --ease: cubic-bezier(.2,.7,.2,1); }
body { font-family: "Pretendard", "Segoe UI", "Malgun Gothic", system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.card { position: relative; overflow: hidden; border-radius: 12px; transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s; }
.card::before { content: ""; position: absolute; left: 0; top: 0; height: 2px; width: 100%; background: linear-gradient(90deg, var(--accent), var(--ray)); transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease); }
.card:hover::before, .card:focus-visible::before { transform: scaleX(1); }
.card .icon { width: 44px; height: 44px; display: grid; place-items: center; font-size: 1.5em; border-radius: 12px; background: color-mix(in srgb, var(--accent) 9%, transparent); }
h2.sec { border-bottom: 1px solid var(--border); position: relative; }
h2.sec::before { content: ""; position: absolute; left: 0; bottom: -1px; width: 56px; height: 2px; background: linear-gradient(90deg, var(--accent), var(--ray)); }
.pill { letter-spacing: .01em; }
.js-reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.js-reveal.in { opacity: 1; transform: none; }
/* 홈 히어로 */
.hero { text-align: left; position: relative; isolation: isolate; overflow: hidden; border-radius: 20px; margin: 0 0 24px; padding: 44px 28px 30px; color: #eaf1fb; background: radial-gradient(120% 140% at 0% 0%, #17325c 0%, #0b1424 62%); }
.hero { position: sticky; top: 0; z-index: 40; transition: padding .3s var(--ease), border-radius .3s; }
.hero .lead, .hero .stats, .hero .tag { transition: opacity .25s, max-height .3s var(--ease); max-height: 12em; }
.hero.compact { padding: 10px 18px; border-radius: 0 0 14px 14px; box-shadow: 0 6px 20px rgba(0,0,0,.25); }
.hero.compact .brand img { width: 38px; }
.hero.compact h1 { font-size: 1.35rem; }
.hero.compact .lead, .hero.compact .stats, .hero.compact .tag { opacity: 0; max-height: 0; margin: 0; overflow: hidden; pointer-events: none; }
body:has(.hero) section[id] { scroll-margin-top: 120px; }
.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }
.hero .brand { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.hero .brand img { width: 84px; height: auto; flex: none; }
.hero h1 { font-size: clamp(1.9rem, 5vw, 2.8rem); line-height: 1.1; letter-spacing: -.01em; font-weight: 600; }
.hero h1 b { font-weight: 800; }
.hero h1 .c, .hero h1 .r { font-weight: 800; font-size: 1.14em; }
.hero h1 .c { color: #5aa2ff; }
.hero h1 .r { color: var(--ray2); }
.hero .tag { margin-top: 4px; color: #aebdd2; font-size: .98em; }
.hero .lead { margin-top: 18px; max-width: 36em; color: #cfdbeb; }
.hero .stats { display: flex; flex-wrap: wrap; gap: 10px 26px; margin-top: 22px; }
.hero .stats a { color: inherit; text-decoration: none; border-left: 2px solid var(--ray); padding-left: 10px; }
.hero .stats b { display: block; font-size: 1.5em; font-variant-numeric: tabular-nums; line-height: 1.1; }
.hero .stats span { font-size: .8em; color: #9fb2cb; }
.hero .stats a:hover b { color: var(--ray2); }
/* 하단 공통 푸터 */
.site-foot { max-width: 1040px; margin: 40px auto 0; padding: 18px 12px 28px; border-top: 1px solid var(--border); color: var(--sub); font-size: .82em; text-align: center; line-height: 1.7; }
.site-foot a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }
.site-foot a:hover { color: var(--accent); }
/* 법적 안내·출처 페이지 */
.doc { max-width: 820px; margin: 0 auto; }
.doc h1 { font-size: 1.7em; margin: 8px 0 4px; }
.doc h2 { font-size: 1.15em; margin: 28px 0 8px; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
.doc h3 { font-size: 1em; margin: 20px 0 6px; }
.doc p, .doc li { color: var(--ink); }
.doc ul { padding-left: 1.3em; margin: 6px 0; }
.doc .box { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; margin: 12px 0; }
.doc .tw { overflow-x: auto; }
.doc table { border-collapse: collapse; width: 100%; font-size: .88em; background: var(--panel); }
.doc th, .doc td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; vertical-align: top; }
.doc th { background: color-mix(in srgb, var(--accent) 8%, var(--panel)); }
.doc .ok { color: var(--ok); font-weight: 600; }
.doc .todo { color: #c07c00; font-weight: 600; }
@media (prefers-reduced-motion: reduce) {
  .js-reveal { opacity: 1; transform: none; transition: none; }
  .card, .card::before { transition: none; }
}

/* 홈: 히어로 안의 메뉴 */
.hero #site-nav { position: absolute; top: 14px; right: 18px; left: auto; height: auto; width: auto; max-width: calc(100% - 36px); background: none; border: 0; z-index: 2; }
.hero #site-nav .in { max-width: none; padding: 0; }
.hero #site-nav .logo { display: none; }
.hero #site-nav .menu { overflow: visible; }
.hero #site-nav a { color: #cfdbeb; }
.hero #site-nav a:hover { color: #fff; background: rgba(255,255,255,.12); }
.hero #site-nav a.on { color: #fff; background: rgba(255,255,255,.16); }
.hero #site-nav a.cta { background: var(--ray); color: #1b1200; }
.hero #site-nav a.cta:hover { background: var(--ray2); color: #1b1200; }
.hero.compact #site-nav { top: 50%; transform: translateY(-50%); }
@media (max-width: 860px) {
  .hero #site-nav { position: static; max-width: none; margin-top: 12px; }
  .hero #site-nav .in { gap: 6px; }
  .hero #site-nav .menu { overflow-x: auto; }
  .hero.compact { padding-bottom: 6px; }
  .hero.compact #site-nav { transform: none; margin-top: 4px; }
}

/* 다른 페이지: 홈 히어로를 줄인 모양의 상단 고정 띠 */
.hero-fixed { position: fixed; top: 0; left: 50%; transform: translateX(-50%); width: min(1040px, 100%); margin: 0; z-index: 50; }
.hero .wm { color: #eaf1fb; font-size: 1.35rem; line-height: 1.1; font-weight: 600; margin: 0; }
.hero .wm .c, .hero .wm .r { font-weight: 800; font-size: 1.14em; }
.hero .wm .c { color: #5aa2ff; }
.hero .wm .r { color: var(--ray2); }
.hero .brand a { display: block; line-height: 0; }
.hero-fixed .brand img { width: 38px; }
body:has(.hero-fixed) section[id] { scroll-margin-top: 90px; }

/* 홈 소개 패널: 크기가 변하지 않는 고정 크기. 히어로(상단 띠)는 항상 같은 크기. */
.intro { position: relative; isolation: isolate; overflow: hidden; border-radius: 16px; margin: 16px 0 24px; padding: 26px 28px 24px; color: #eaf1fb; background: radial-gradient(120% 140% at 0% 0%, #17325c 0%, #0b1424 62%); }
.intro canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }
.intro .tag { color: #9fb2cb; font-size: .9em; letter-spacing: .02em; }
.intro .lead { margin-top: 6px; max-width: 36em; color: #e3ecf8; font-size: 1.05em; }
.intro .stats { display: flex; flex-wrap: wrap; gap: 10px 26px; margin-top: 18px; }
.intro .stats a { color: inherit; text-decoration: none; border-left: 2px solid var(--ray); padding-left: 10px; }
.intro .stats b { display: block; font-size: 1.5em; font-variant-numeric: tabular-nums; line-height: 1.1; }
.intro .stats span { font-size: .8em; color: #9fb2cb; }
.intro .stats a:hover b { color: var(--ray2); }