:root{
  --bg:#fdfdff; --bg2:#f6f8fd; --surface:#ffffff;
  --ink:#1e2748; --ink-dim:#4c5878; --ink-faint:#828bab;
  --paper:#edf2ff; --paper-ink:#1e2748; --paper-dim:#5b6588;
  --accent:#c3cfff; --accent-2:#8398db; --accent-on:#1e2748; --accent-bg:#8ea4f8;
  --line:#e6ebfb; --line-strong:#d3ddf8;
  --font-display:"Pretendard Variable", Pretendard, -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  --font-body:"Pretendard Variable", Pretendard, -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  --font-mono:"IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --radius:12px; --radius-lg:20px;
  --border-w:1px;
  --gutter:clamp(20px, 4.5vw, 64px);
  --section-y:clamp(54px, 6vw, 88px);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --ease-inout:cubic-bezier(.7,0,.16,1);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:auto;scroll-padding-top:84px}
html.no-motion{scroll-behavior:smooth}
body{
  font-family:var(--font-body);background:var(--bg);color:var(--ink);
  font-size:clamp(15.5px,1.08vw,17.5px);line-height:1.8;letter-spacing:-0.006em;
  word-break:keep-all;overflow-wrap:break-word;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
::selection{background:var(--accent);color:var(--accent-on)}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
/* hidden 속성이 display 지정 규칙(.at-btn 등)에 지지 않도록 — admin 오버라이드로 켜지는 요소의 기본 숨김 */
[hidden]{display:none!important}

/* ---- 톤 시스템 ---- */
.tone-dark,.tone-light{--s-bg:var(--bg);--s-bg2:var(--bg2);--s-ink:var(--ink);--s-dim:var(--ink-dim);--s-faint:var(--ink-faint);--s-line:var(--line);--s-line-strong:var(--line-strong);--s-accent:var(--accent-bg)}
.tone-paper,.tone-inverse{--s-bg:var(--paper);--s-ink:var(--paper-ink);--s-dim:color-mix(in srgb,var(--paper-ink) 62%,var(--paper));--s-faint:color-mix(in srgb,var(--paper-ink) 40%,var(--paper));--s-line:color-mix(in srgb,var(--paper-ink) 16%,transparent);--s-line-strong:color-mix(in srgb,var(--paper-ink) 34%,transparent);--s-accent:var(--accent)}
.tone-inverse{--s-accent:color-mix(in srgb,var(--accent) 70%,var(--paper-ink))}
.tone-paper{--s-accent:var(--accent-2)}
.tone-accentBlock{--s-bg:var(--accent);--s-ink:var(--accent-on);--s-dim:color-mix(in srgb,var(--accent-on) 78%,var(--accent));--s-faint:color-mix(in srgb,var(--accent-on) 55%,var(--accent));--s-line:color-mix(in srgb,var(--accent-on) 25%,transparent);--s-line-strong:color-mix(in srgb,var(--accent-on) 45%,transparent);--s-accent:var(--accent-on)}
/* 채움 버튼 fill은 강조 텍스트 대비(--s-accent)와 분리 — 밝은/종이 톤에선 브랜드 원색을 그대로 채운다(버튼 위 글자는 --accent-on이 대비 보장). 짙은 accent 디렉션에선 accent-bg==accent라 무영향 */
.tone-light,.tone-paper{--s-btn:var(--accent)}
section[class*="at-"]{background:var(--s-bg);color:var(--s-ink)}

/* ---- 컨테이너/그리드 ---- */
.at-wrap{max-width:1440px;margin-inline:auto;padding-inline:var(--gutter)}
.at-section{padding-block:var(--section-y);position:relative;overflow:clip}

/* ---- 타이포 시스템 ---- */
.at-label{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;
  color:var(--s-accent);display:flex;align-items:center;gap:12px;font-weight:500;
}
.at-label::before{content:"";width:34px;height:1px;background:var(--s-accent);display:inline-block}
.at-title{
  font-family:var(--font-display);font-weight:760;
  font-size:clamp(1.9rem,4.4vw,3.5rem);line-height:1.22;letter-spacing:-0.035em;
  margin-top:22px;
}
.at-title .at-em{color:var(--s-accent);font-style:normal}
.at-sub{margin-top:18px;color:var(--s-dim);max-width:56ch;font-size:clamp(15px,1.15vw,17px)}
.at-shead{margin-bottom:clamp(36px,4.6vw,60px)}
.at-shead.center{text-align:center}
.at-shead.center .at-label{justify-content:center}
.at-shead.center .at-label::before{display:none}
.at-shead.center .at-sub{margin-inline:auto}

/* 섹션 메타 행 (인덱스 넘버 + 구분선) */
.at-meta-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:18px;
  border-top:var(--border-w) solid var(--s-line-strong);padding-top:16px;margin-bottom:clamp(32px,4vw,52px);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--s-faint);
}

/* ---- 버튼 ---- */
.at-btn{
  position:relative;display:inline-flex;align-items:center;gap:14px;
  padding:17px 30px;border-radius:var(--radius);
  font-weight:700;font-size:15px;letter-spacing:-0.01em;line-height:1;
  background:var(--s-btn, var(--s-accent, var(--accent)));color:var(--accent-on);
  overflow:hidden;transition:transform .5s var(--ease-out);
  border:var(--border-w) solid transparent;
}
.tone-accentBlock .at-btn{background:var(--accent-on);color:var(--accent)}
.at-btn .at-ic{width:17px;height:17px;transition:transform .45s var(--ease-out)}
.at-btn::after{content:"";position:absolute;inset:0;background:color-mix(in srgb,#000 14%,transparent);transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease-out)}
.at-btn:hover::after{transform:scaleX(1)}
.at-btn:hover .at-ic{transform:translateX(5px)}
.at-btn>*{position:relative;z-index:1}
.at-btn--ghost{background:transparent;color:var(--s-ink, var(--ink));border-color:var(--s-line-strong, var(--line-strong))}
.at-btn--ghost::after{background:var(--s-ink);opacity:.06}
.at-link{
  display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:14.5px;
  color:var(--s-accent);position:relative;padding-bottom:3px;
}
.at-link::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;background:currentColor;transform:scaleX(1);transform-origin:right;transition:transform .45s var(--ease-out)}
.at-link:hover::after{transform:scaleX(0)}
.at-link:hover{opacity:.85}
.at-link .at-ic{width:15px;height:15px}

/* ---- 아이콘 ---- */
.at-ic{width:22px;height:22px;flex:none}

/* ---- 리빌 준비 상태 (JS 활성 시에만 숨김 → JS 실패에도 안전) ---- */
html.js:not(.no-motion) [data-reveal],
html.js:not(.no-motion) [data-reveal-group]>*{will-change:transform,opacity}
.at-ch-w{display:inline-block;overflow:hidden;vertical-align:top}
.at-ch{display:inline-block}

/* ---- 커스텀 커서 ---- */
.at-cursor-dot,.at-cursor-ring{position:fixed;top:0;left:0;pointer-events:none;z-index:9999;border-radius:50%;display:none;opacity:0}
body.has-cursor .at-cursor-dot,body.has-cursor .at-cursor-ring{display:block}
body.cursor-seen .at-cursor-dot,body.cursor-seen .at-cursor-ring{opacity:1}
.at-cursor-dot{width:6px;height:6px;background:var(--accent);margin:-3px 0 0 -3px}
.at-cursor-ring{width:34px;height:34px;border:1px solid color-mix(in srgb,var(--accent) 65%,transparent);margin:-17px 0 0 -17px;transition:width .3s,height .3s,margin .3s,background .3s}
body.cursor-active .at-cursor-ring{width:52px;height:52px;margin:-26px 0 0 -26px;background:color-mix(in srgb,var(--accent) 12%,transparent)}
@media (pointer:coarse){.at-cursor-dot,.at-cursor-ring{display:none!important}}

/* ---- 진행 헤어라인 (CSS 스크롤 타임라인 우선 — research/notes/2026-07-12) ---- */
.at-progress{position:fixed;top:0;left:0;width:100%;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;z-index:1001}
@supports (animation-timeline: scroll()) {
  .at-progress{animation:at-progress-grow linear both;animation-timeline:scroll(root)}
  @keyframes at-progress-grow{from{transform:scaleX(0)}to{transform:scaleX(1)}}
}

/* ---- 접근성 ---- */
.at-skip{position:fixed;top:-72px;left:16px;z-index:2000;background:var(--accent);color:var(--accent-on);padding:12px 18px;border-radius:4px;font-weight:700;transition:top .2s}
.at-skip:focus{top:12px}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.at-sr{position:absolute;width:1px;height:1px;clip-path:inset(50%);overflow:hidden}

/* ---- 스크롤바 ---- */
@supports (scrollbar-width:thin){html{scrollbar-width:thin;scrollbar-color:var(--line-strong) transparent}}



/* ---- 페이지 전환 (cross-document View Transitions — 미지원 브라우저는 at-rule 무시=일반 내비, notes/2026-07-12-view-transitions) ---- */
@view-transition{navigation:auto}

/* ---- 모션 축소 ---- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  ::view-transition-group(*),::view-transition-old(*),::view-transition-new(*){animation:none!important}
}

/* §nav */
.at-nav{position:fixed;top:0;left:0;right:0;z-index:1101;transition:background .4s,border-color .4s;border-bottom:1px solid transparent}
.at-nav.is-scrolled{background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-color:var(--line)}
/* 메뉴 열림 중엔 nav를 오버레이 위(z 1101 > .at-menu 1100)로 올려 버거(X) 재탭 닫힘 보장 —
   단 스크롤 배경/블러가 메뉴 위로 새지 않게 무력화 (iter-26 z-index 스택 컨텍스트 버그 수정) */
body.menu-open .at-nav{background:transparent;border-color:transparent;backdrop-filter:none;-webkit-backdrop-filter:none}
.at-nav-in{max-width:1440px;margin-inline:auto;padding:0 var(--gutter);height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.at-nav-brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:16.5px;letter-spacing:-0.02em}
.at-nav-brand img{width:34px;height:auto}
.at-nav-links{display:flex;gap:6px}
.at-nav-links a{font-size:14px;font-weight:600;color:var(--ink-dim);padding:9px 13px;border-radius:var(--radius);position:relative;transition:color .3s}
.at-nav-links a:hover{color:var(--ink)}
.at-nav-links a::after{content:"";position:absolute;left:13px;right:13px;bottom:4px;height:1px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease-out)}
.at-nav-links a:hover::after{transform:scaleX(1)}
.at-nav-links a[aria-current]{color:var(--ink)}
.at-nav-links a[aria-current]::after{transform:scaleX(1)}
.at-nav-cta{padding:12px 20px;font-size:13.5px}
.at-nav-right{display:flex;align-items:center;gap:14px}
.at-burger{display:none;width:40px;height:40px;flex-direction:column;justify-content:center;align-items:center;gap:7px;z-index:1102}
.at-burger span{display:block;width:24px;height:2px;background:var(--ink);transition:transform .4s var(--ease-out),opacity .3s}
body.menu-open .at-burger span:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
body.menu-open .at-burger span:nth-child(2){transform:translateY(-4.5px) rotate(-45deg)}
.at-menu{position:fixed;inset:0;background:var(--bg);z-index:1100;display:flex;flex-direction:column;justify-content:center;gap:40px;padding:var(--gutter);opacity:0;pointer-events:none;visibility:hidden;transition:opacity .45s var(--ease-out),visibility 0s .45s}
body.menu-open .at-menu{opacity:1;pointer-events:auto;visibility:visible;transition-delay:0s}
body.menu-open .at-burger{position:fixed;top:16px;right:var(--gutter)}
.at-menu-links{display:flex;flex-direction:column;gap:4px}
.at-menu-links a{font-family:var(--font-display);font-size:clamp(2rem,8vw,3.2rem);font-weight:700;letter-spacing:-0.03em;display:flex;align-items:baseline;gap:18px;padding:10px 0;border-bottom:1px solid var(--line);transform:translateY(24px);opacity:0;transition:transform .6s var(--ease-out),opacity .6s}
.at-menu-links a i{font-family:var(--font-mono);font-style:normal;font-size:13px;color:var(--accent-bg)}
body.menu-open .at-menu-links a{transform:none;opacity:1}
body.menu-open .at-menu-links a:nth-child(1){transition-delay:0.11s}
body.menu-open .at-menu-links a:nth-child(2){transition-delay:0.16s}
body.menu-open .at-menu-links a:nth-child(3){transition-delay:0.21000000000000002s}
body.menu-open .at-menu-links a:nth-child(4){transition-delay:0.26s}
body.menu-open .at-menu-links a:nth-child(5){transition-delay:0.31s}
body.menu-open .at-menu-links a:nth-child(6){transition-delay:0.36000000000000004s}
body.menu-open .at-menu-links a:nth-child(7){transition-delay:0.41000000000000003s}
body.menu-open .at-menu-links a:nth-child(8){transition-delay:0.46s}
@media (max-width:960px){
  .at-nav-links{display:none}
  .at-nav-cta{display:none}
  .at-burger{display:flex}
  .at-nav-in{height:64px}
}
/* §hero */
.at-hero{min-height:100svh;display:flex;flex-direction:column;justify-content:center;position:relative;overflow:clip;padding-top:88px}
#at-scene{position:absolute;inset:0;width:100%;height:100%;display:block}
.at-hero-veil{position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(100deg,var(--s-bg) 6%,color-mix(in srgb,var(--s-bg) 55%,transparent) 46%,transparent 78%),
  linear-gradient(to top,var(--s-bg) 0%,transparent 26%)}
.is-center .at-hero-veil{background:radial-gradient(ellipse 90% 62% at 50% 46%,color-mix(in srgb,var(--s-bg) 62%,transparent),transparent 72%),linear-gradient(to top,var(--s-bg),transparent 30%)}
.at-hero-in{position:relative;z-index:2;width:100%}
.is-center .at-hero-in{text-align:center}
.at-hero-eyebrow{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.24em;color:var(--s-dim);display:flex;align-items:center;gap:10px;margin-bottom:clamp(22px,3vw,34px)}
.is-center .at-hero-eyebrow{justify-content:center}
.at-hero-dot{width:7px;height:7px;border-radius:50%;background:var(--s-accent);box-shadow:0 0 12px var(--s-accent);display:inline-block}
.at-hero-title{
  font-family:var(--font-display);font-weight:760;
  font-size:clamp(2.45rem,6.6vw,5.3rem);line-height:1.16;letter-spacing:-0.035em;
  max-width:18ch;
}
.is-center .at-hero-title{margin-inline:auto}
.at-hero-title .at-em{color:var(--s-accent);font-style:normal;position:relative}
.at-hero-sub{margin-top:clamp(20px,2.6vw,30px);color:var(--s-dim);max-width:56ch;font-size:clamp(14.5px,1.15vw,17px)}
.is-center .at-hero-sub{margin-inline:auto}
.at-hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px;list-style:none}
.is-center .at-hero-tags{justify-content:center}
.at-hero-tags li{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--s-dim);border:1px solid var(--s-line-strong);padding:7px 13px;border-radius:100px}
.at-hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:clamp(28px,3.4vw,42px)}
.is-center .at-hero-cta{justify-content:center}
.at-hero-foot{position:absolute;bottom:26px;left:0;right:0;display:flex;justify-content:space-between;align-items:center;z-index:2;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.18em;color:var(--s-faint)}
.at-hero-scroll{display:inline-flex;align-items:center;gap:8px}
.at-hero-scroll .at-ic{width:13px;height:13px;animation:at-bob 2.2s var(--ease-inout) infinite}
@keyframes at-bob{0%,100%{transform:translateY(0)}50%{transform:translateY(5px)}}
@media (max-width:720px){
  /* 모바일: 100svh 강제+가운데정렬이 만들던 상하 과여백 제거 → 콘텐츠 높이에 맞춤 */
  .at-hero{padding-top:92px;padding-bottom:60px;min-height:auto;justify-content:flex-start}
  .at-hero-title{font-size:clamp(2.1rem,9.5vw,2.9rem)}
  .at-hero-foot{display:none}
}
/* §rollbanner */
.at-roll{background:var(--s-bg);color:var(--s-ink);padding-bottom:clamp(20px,3vw,44px)}
.at-roll-frame{position:relative;border:var(--border-w) solid var(--s-line-strong);border-radius:var(--radius-lg);
  background:color-mix(in srgb,var(--s-ink) 3.5%,var(--s-bg));overflow:hidden;min-height:clamp(240px,24vw,300px);display:grid}
.at-roll-slide{grid-area:1/1;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:clamp(18px,3vw,48px);align-items:center;
  padding:clamp(26px,3.4vw,48px) clamp(24px,3.4vw,52px) clamp(56px,5vw,72px);
  opacity:0;transform:translateY(14px);pointer-events:none;visibility:hidden;
  transition:opacity .65s var(--ease-out),transform .65s var(--ease-out),visibility 0s .65s}
.at-roll-slide.is-on{opacity:1;transform:none;pointer-events:auto;visibility:visible;transition-delay:0s}
.at-roll-kicker{font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;color:var(--s-accent);display:flex;align-items:center;gap:10px;margin-bottom:14px}
.at-roll-kicker i{width:7px;height:7px;border-radius:50%;background:var(--s-accent);box-shadow:0 0 10px var(--s-accent)}
.at-roll-title{font-family:var(--font-display);font-weight:760;font-size:clamp(1.45rem,2.8vw,2.3rem);line-height:1.24;letter-spacing:-0.035em}
.at-roll-title .at-em{color:var(--s-accent);font-style:normal}
.at-roll-sub{margin-top:12px;color:var(--s-dim);font-size:clamp(14px,1.1vw,15.5px);max-width:62ch}
.at-roll-meta{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.at-roll-meta li{font-family:var(--font-mono);font-size:12px;color:var(--s-dim);border:1px solid var(--s-line);padding:6px 12px;border-radius:100px}
.at-roll-side{display:flex;flex-direction:column;align-items:flex-end;gap:18px}
.at-roll-num{font-family:var(--font-mono);font-size:13px;letter-spacing:.14em;color:var(--s-faint)}
.at-roll-cta{white-space:nowrap}
.at-roll-nav{position:absolute;left:clamp(24px,3.4vw,52px);right:calc(clamp(24px,3.4vw,52px) + 50px);bottom:20px;display:flex;gap:14px;z-index:3}
.at-roll-nav button{display:flex;align-items:center;gap:8px;flex:1;max-width:130px;padding:6px 0;cursor:pointer;color:var(--s-faint)}
.at-roll-nav button i{font-family:var(--font-mono);font-style:normal;font-size:10.5px;letter-spacing:.12em;transition:color .3s}
.at-roll-nav button[aria-selected="true"] i{color:var(--s-accent)}
.at-roll-bar{flex:1;height:2px;background:var(--s-line);border-radius:2px;overflow:hidden}
.at-roll-bar b{display:block;height:100%;width:0;background:var(--s-accent)}
.at-roll-nav button.is-run .at-roll-bar b{animation:at-roll-run var(--roll-iv,5200ms) linear forwards}
.at-roll-nav button[aria-selected="true"]:not(.is-run) .at-roll-bar b{width:100%}
@keyframes at-roll-run{from{width:0}to{width:100%}}
/* 정지/재생 토글(iter-22 KWCAG) — 번호 탭과 같은 컨트롤 군, 우측 하단. 탭은 max-width 캡으로
   예약 레인(+50px)에 닿지 않아 기존 지오메트리 불변. JS 없이는 동작이 없으므로 html.js에서만 표시 */
.at-roll-toggle{position:absolute;right:clamp(24px,3.4vw,52px);bottom:18px;z-index:4;width:36px;height:36px;
  display:none;align-items:center;justify-content:center;color:var(--s-dim);
  border:1px solid var(--s-line);border-radius:var(--radius);touch-action:manipulation;
  transition:color .3s,border-color .3s}
html.js .at-roll-toggle{display:flex}
.at-roll-toggle:hover{color:var(--s-accent);border-color:var(--s-accent)}
.at-roll-toggle svg{display:block}
.at-roll-toggle .at-rt-play{display:none}
.at-roll-toggle[aria-pressed="true"] .at-rt-pause{display:none}
.at-roll-toggle[aria-pressed="true"] .at-rt-play{display:block}
@media (max-width:840px){
  .at-roll-slide{grid-template-columns:1fr;padding-bottom:84px}
  .at-roll-side{flex-direction:row;align-items:center;justify-content:space-between;width:100%}
  .at-roll-num{order:2}
  /* 모바일: 탭이 스트립 전폭을 쓰므로(탭 축소 금지) 토글은 스트립 위 여유 밴드(84px 패딩 − 스트립 51.9px = 33.1px)로 */
  .at-roll-nav{right:clamp(24px,3.4vw,52px)}
  .at-roll-toggle{width:32px;height:32px;bottom:53px}
}
/* §quicklinks */
.at-quick{padding-block:clamp(10px,1.4vw,20px) clamp(52px,6vw,84px);background:var(--s-bg);color:var(--s-ink)}
.at-quick-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.at-quick-title{font-size:14px;font-weight:600;color:var(--s-dim)}
.at-quick-grid{list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border:var(--border-w) solid var(--s-line-strong);border-radius:var(--radius-lg);overflow:hidden}
.at-quick-grid li+li{border-left:var(--border-w) solid var(--s-line-strong)}
.at-quick-card{display:flex;flex-direction:column;gap:8px;padding:clamp(22px,2.6vw,34px);min-height:clamp(170px,16vw,230px);position:relative;transition:background .45s var(--ease-out),color .45s var(--ease-out)}
.at-quick-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:auto}
.at-quick-idx{font-family:var(--font-mono);font-style:normal;font-size:12px;letter-spacing:.12em;color:var(--s-faint);transition:color .4s}
.at-quick-ic{width:26px;height:26px;color:var(--s-accent);transition:color .4s,transform .5s var(--ease-out)}
.at-quick-label{font-size:clamp(16.5px,1.35vw,19px);font-weight:800;letter-spacing:-0.02em}
.at-quick-desc{font-size:13.5px;color:var(--s-dim);transition:color .4s}
.at-quick-go{position:absolute;right:20px;bottom:18px;opacity:0;transform:translate(-6px,6px);transition:opacity .4s,transform .5s var(--ease-out)}
.at-quick-go .at-ic{width:16px;height:16px}
.at-quick-card:hover{background:var(--s-accent);color:var(--accent-on)}
.at-quick-card:hover .at-quick-idx,.at-quick-card:hover .at-quick-desc{color:color-mix(in srgb,var(--accent-on) 90%,transparent)}
.at-quick-card:hover .at-quick-ic{color:var(--accent-on);transform:translateY(-4px)}
.at-quick-card:hover .at-quick-go{opacity:1;transform:none}
@media (max-width:960px){
  .at-quick-grid{grid-template-columns:1fr 1fr}
  .at-quick-grid li:nth-child(n+3){border-top:var(--border-w) solid var(--s-line-strong)}
  .at-quick-grid li:nth-child(3){border-left:0}
  .at-quick-card{min-height:150px}
}
/* §marquee */
.at-marquee{border-block:var(--border-w) solid var(--s-line);padding-block:20px;overflow:clip;background:var(--s-bg);color:var(--s-ink)}
.at-marquee-track{display:flex;width:max-content;animation:at-marq 34s linear infinite}
.at-marquee-seq{display:flex;align-items:center;gap:34px;padding-right:34px}
.at-marquee-seq span{font-family:var(--font-display);font-size:clamp(1.5rem,2.8vw,2.3rem);font-weight:760;letter-spacing:-0.02em;white-space:nowrap}
.at-marquee-seq span.is-outline{color:transparent;-webkit-text-stroke:1.3px color-mix(in srgb,var(--s-ink) 46%,transparent)}
@supports not (-webkit-text-stroke:1px black){.at-marquee-seq span.is-outline{color:var(--s-faint)}}
.at-marquee-seq i{color:var(--s-accent);display:flex}
.at-marquee-seq i .at-ic{width:19px;height:19px}
@keyframes at-marq{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.at-marquee-track{animation:none}}
/* §why */
.at-why-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,4fr);gap:clamp(28px,4vw,72px);align-items:end}
.at-why .at-shead{margin-bottom:0}
.at-why-note{color:var(--s-dim);font-size:14.5px;border-left:var(--border-w) solid var(--s-line-strong);padding-left:22px;max-width:38ch;justify-self:end;align-self:end}
.at-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin-top:clamp(40px,5.4vw,72px);border-top:var(--border-w) solid var(--s-line-strong)}
.at-stat{padding:30px 26px 8px 0;border-right:var(--border-w) solid var(--s-line)}
.at-stat:last-child{border-right:0}
.at-stat+.at-stat{padding-left:26px}
.at-stat{transition:background .4s}
.at-stat dt{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--s-faint);margin-bottom:18px;transition:color .35s}
.at-stat:hover dt{color:var(--s-accent)}
.at-stat:hover .at-stat-num{transform:translateY(-3px)}
.at-stat-num{font-family:var(--font-body);font-weight:760;font-size:clamp(2.6rem,5.4vw,4.6rem);line-height:1;letter-spacing:-0.03em;color:var(--s-ink);display:flex;align-items:baseline;gap:4px;font-variant-numeric:tabular-nums;transition:transform .45s var(--ease-out)}
.at-stat-num i{font-style:normal;font-size:.42em;color:var(--s-accent);font-family:var(--font-body);font-weight:700}
.at-stat-note{display:block;margin-top:12px;font-size:13.5px;color:var(--s-dim)}
@media (max-width:960px){
  .at-why-grid{grid-template-columns:1fr}
  .at-why-note{justify-self:start;border-left:0;border-top:var(--border-w) solid var(--s-line);padding:18px 0 0}
  .at-stats{grid-template-columns:1fr 1fr}
  .at-stat{border-right:0;border-bottom:var(--border-w) solid var(--s-line);padding:24px 0 20px}
  .at-stat+.at-stat{padding-left:0}
  .at-stat:nth-child(odd){padding-right:24px;border-right:var(--border-w) solid var(--s-line)}
  .at-stat:nth-child(even){padding-left:24px}
  .at-stat:nth-last-child(-n+2){border-bottom:0}
}
/* §banners */
.at-ledger{border-top:var(--border-w) solid var(--s-line-strong)}
.at-ledger-row{display:flex;align-items:center;gap:clamp(20px,2.6vw,40px);
  padding:clamp(24px,3vw,40px) clamp(4px,1vw,18px);border-bottom:var(--border-w) solid var(--s-line-strong);position:relative;transition:padding .5s var(--ease-out)}
.at-ledger-row::before{content:"";position:absolute;inset:0;background:color-mix(in srgb,var(--s-ink) 4%,transparent);transform:scaleY(0);transform-origin:bottom;transition:transform .5s var(--ease-out);pointer-events:none}
.at-ledger-row:hover::before{transform:scaleY(1)}
.at-ledger-row:hover{padding-left:clamp(12px,1.6vw,26px)}
.at-ledger-idx{flex:0 0 auto;font-family:var(--font-mono);font-size:13px;letter-spacing:.1em;color:var(--s-faint);align-self:start;padding-top:6px}
.at-ledger-main{flex:0 1 auto;max-width:600px;display:flex;flex-direction:column;gap:9px;min-width:0}
.at-ledger-act{flex:0 0 auto;margin-left:auto;display:inline-flex;align-items:center;gap:clamp(16px,1.6vw,24px)}
.at-ledger-kicker{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.2em;color:var(--s-accent)}
.at-ledger-title{font-family:var(--font-display);font-weight:760;font-size:clamp(1.3rem,2.5vw,2rem);line-height:1.28;letter-spacing:-0.035em}
.at-ledger-title .at-em{color:var(--s-accent);font-style:normal}
.at-ledger-sub{font-size:15px;color:var(--s-dim);max-width:60ch}
.at-ledger-cta{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:13.5px;color:var(--s-ink);white-space:nowrap;
  border:var(--border-w) solid var(--s-line-strong);padding:13px 20px;border-radius:100px;transition:background .4s,color .4s,border-color .4s}
.at-ledger-cta .at-ic{width:15px;height:15px;transition:transform .45s var(--ease-out)}
.at-ledger-row:hover .at-ledger-cta{background:var(--s-accent);border-color:var(--s-accent);color:var(--accent-on)}
.at-ledger-row:hover .at-ledger-cta .at-ic{transform:translate(2px,-2px)}
.at-ledger-icon{flex:0 0 auto;width:72px;height:72px;border-radius:50%;border:var(--border-w) solid var(--s-line);display:grid;place-items:center;color:var(--s-accent);transition:transform .55s var(--ease-out),background .4s}
.at-ledger-icon .at-ic{width:28px;height:28px}
.at-ledger-row:hover .at-ledger-icon{transform:rotate(8deg) scale(1.06)}
@media (max-width:960px){
  .at-ledger-row{flex-wrap:wrap;column-gap:14px;row-gap:8px}
  .at-ledger-main{flex:1 1 0;max-width:none}
  .at-ledger-act{flex-basis:100%;margin-left:0;margin-top:6px;justify-content:flex-start}
  .at-ledger-icon{display:none}
}
/* §faculty */
.at-fac-rows{border-top:var(--border-w) solid var(--s-line-strong)}
.at-fac-row{display:grid;grid-template-columns:minmax(0,2.4fr) minmax(0,4.4fr) minmax(0,5fr);gap:clamp(18px,3vw,52px);
  padding:clamp(26px,3.4vw,44px) 0;border-bottom:var(--border-w) solid var(--s-line-strong);align-items:start;position:relative}
.at-fac-row.has-photo{grid-template-columns:clamp(120px,13vw,180px) minmax(0,2fr) minmax(0,4fr) minmax(0,4.6fr);align-items:center}
.at-fac-photo{aspect-ratio:3/3.6;border-radius:var(--radius-lg);overflow:hidden;background:color-mix(in srgb,var(--s-accent) 8%,var(--s-bg));border:var(--border-w) solid var(--s-line)}
.at-fac-photo img{width:100%;height:100%;object-fit:cover;object-position:top;transition:transform .8s var(--ease-out)}
.at-fac-row:hover .at-fac-photo img{transform:scale(1.045)}
.at-fac-photo.is-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:var(--s-faint)}
.at-fac-photo.is-empty .at-ic{width:30px;height:30px;color:var(--s-accent);opacity:.6}
.at-fac-photo.is-empty span{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em}
.at-fac-meta{display:flex;flex-direction:column;gap:12px}
.at-fac-idx{font-family:var(--font-mono);font-size:13px;color:var(--s-faint);letter-spacing:.1em}
.at-fac-subject{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.18em;color:var(--s-accent);border:1px solid color-mix(in srgb,var(--s-accent) 40%,transparent);padding:6px 12px;border-radius:100px;width:fit-content}
.at-fac-name{font-family:var(--font-display);font-weight:760;font-size:clamp(1.7rem,3.6vw,2.9rem);letter-spacing:-0.035em;line-height:1.15;transition:color .35s}
.at-fac-row:hover .at-fac-name{color:var(--s-accent)}
.at-fac-role{margin-top:10px;font-size:13.5px;font-weight:600;color:var(--s-dim)}
.at-fac-desc{color:var(--s-dim);font-size:15px;max-width:56ch;padding-top:8px}
@media (max-width:960px){
  .at-fac-row,.at-fac-row.has-photo{grid-template-columns:1fr;gap:14px}
  .at-fac-photo{max-width:220px}
  .at-fac-meta{flex-direction:row;align-items:center}
}
/* §youtube */
.at-tube-frame{position:relative;aspect-ratio:16/9;border-radius:var(--radius-lg);overflow:hidden;background:color-mix(in srgb,var(--s-ink) 6%,var(--s-bg));border:var(--border-w) solid var(--s-line)}
.at-tube-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.at-tube-poster{position:absolute;inset:0;width:100%;cursor:pointer;display:block}
.at-tube-poster img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease-out),opacity .4s;opacity:.88}
.at-tube-poster:hover img{transform:scale(1.03);opacity:1}
.at-tube-play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:92px;height:92px;border-radius:50%;
  background:color-mix(in srgb,var(--s-bg) 55%,transparent);backdrop-filter:blur(10px);border:1px solid var(--s-line-strong);
  display:grid;place-items:center;color:var(--s-ink);transition:transform .5s var(--ease-out),background .4s}
.at-tube-play .at-ic{width:34px;height:34px}
.at-tube-poster:hover .at-tube-play{transform:translate(-50%,-50%) scale(1.1);background:var(--s-accent);color:var(--accent-on)}
.at-tube-standby{position:relative;overflow:hidden;border-radius:var(--radius-lg);border:var(--border-w) solid var(--s-line);
  background:
    repeating-linear-gradient(115deg, color-mix(in srgb,var(--s-accent) 6%,transparent) 0 1px, transparent 1px 96px),
    color-mix(in srgb,var(--s-ink) 5%,var(--s-bg));
  display:flex;align-items:center;min-height:clamp(190px,22vw,264px);
  padding:clamp(30px,4.5vw,58px) clamp(24px,4vw,56px)}
.at-tube-ridge{position:absolute;right:-2%;top:50%;transform:translateY(-50%);width:min(58%,560px);height:82%;color:var(--s-accent);opacity:.2;pointer-events:none}
.at-tube-standby-copy{position:relative;display:flex;flex-direction:column;align-items:flex-start;gap:14px;text-align:left}
.at-tube-badge{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-mono);font-size:11px;letter-spacing:.28em;color:var(--s-accent);border:1px solid color-mix(in srgb,var(--s-accent) 45%,transparent);padding:8px 16px;border-radius:100px}
.at-pulse{width:7px;height:7px;border-radius:50%;background:var(--s-accent);animation:at-pulse 2.2s var(--ease-out) infinite}
@keyframes at-pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.72)}}
@media (prefers-reduced-motion:reduce){.at-pulse{animation:none}}
.at-tube-standby-note{font-family:var(--font-display);font-weight:700;font-size:clamp(1.25rem,2.2vw,1.7rem);color:var(--s-ink);letter-spacing:-0.02em;max-width:34ch}
.at-tube-hint{font-size:13px;color:var(--s-faint)}
/* CTA·채널 링크 행 — 대기카드/영상프레임 어느 상태에서도 동일하게 유지된다 */
.at-tube-foot{margin-top:clamp(16px,1.8vw,24px);display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.at-tube-cta{white-space:nowrap}
.at-tube-channel{margin-left:auto}
@media (max-width:760px){
  .at-tube-standby{align-items:flex-start;min-height:0}
  .at-tube-ridge{width:88%;height:46%;top:auto;bottom:-8%;transform:none;opacity:.13}
  .at-tube-foot{flex-direction:column;align-items:stretch}
  .at-tube-cta{width:100%;justify-content:center;white-space:normal}
  .at-tube-channel{margin-left:0;justify-content:center}
}
/* §admissions */
.at-adm-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(20px,2.6vw,36px);align-items:stretch}
.at-adm-kakao{border:var(--border-w) solid var(--s-line-strong);border-radius:var(--radius-lg);padding:clamp(30px,3.6vw,52px);display:flex;flex-direction:column;gap:26px;background:color-mix(in srgb,var(--s-ink) 3.5%,var(--s-bg))}
.at-adm-kakao-head{display:flex;gap:20px;align-items:center}
.at-adm-big-ic{width:52px;height:52px;color:var(--s-accent);flex:none}
.at-adm-k-label{font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;color:var(--s-faint)}
.at-adm-k-handle{font-family:var(--font-display);font-weight:760;font-size:clamp(1.4rem,2.4vw,2rem);letter-spacing:-0.035em;margin-top:6px}
.at-adm-k-id{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--s-dim);margin-top:8px}
.at-adm-k-id b{color:var(--s-accent);font-weight:600}
.at-adm-hours{display:flex;gap:12px;align-items:flex-start;color:var(--s-dim);font-size:14.5px;border-top:1px solid var(--s-line);padding-top:22px}
.at-adm-hours .at-ic{width:18px;height:18px;color:var(--s-accent);margin-top:3px}
.at-adm-kakao .at-btn{margin-top:auto;width:fit-content}
.at-adm-side{display:flex;flex-direction:column;gap:14px}
.at-adm-phone{border:var(--border-w) solid var(--s-line-strong);border-radius:var(--radius-lg);padding:22px 26px;display:flex;flex-direction:column;gap:10px;transition:background .4s,color .4s,transform .45s var(--ease-out)}
.at-adm-phone:hover{background:var(--s-accent);color:var(--accent-on);transform:translateY(-3px)}
.at-adm-p-label{display:flex;align-items:center;gap:9px;font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--s-faint);transition:color .4s}
.at-adm-phone:hover .at-adm-p-label{color:color-mix(in srgb,var(--accent-on) 75%,transparent)}
.at-adm-p-label .at-ic{width:15px;height:15px}
.at-adm-p-num{font-family:var(--font-mono);font-size:clamp(1.3rem,2vw,1.7rem);font-weight:600;letter-spacing:.02em;font-variant-numeric:tabular-nums}
.at-adm-mini{display:flex;justify-content:space-between;align-items:center;padding:16px 22px;border:var(--border-w) solid var(--s-line);border-radius:var(--radius-lg);font-weight:700;font-size:14px;color:var(--s-dim);transition:border-color .35s,color .35s,padding .4s var(--ease-out)}
.at-adm-mini .at-ic{width:15px;height:15px}
.at-adm-mini:hover{border-color:var(--s-accent);color:var(--s-accent);padding-left:26px}
@media (max-width:960px){.at-adm-grid{grid-template-columns:1fr}}
/* §faq */
.at-faq-grid{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,7fr);gap:clamp(28px,4vw,72px);align-items:start}
.at-faq .at-shead{margin-bottom:0;position:sticky;top:110px}
.at-faq-list{border-top:var(--border-w) solid var(--s-line-strong)}
.at-faq-item{border-bottom:var(--border-w) solid var(--s-line-strong)}
.at-faq-item summary{display:grid;grid-template-columns:56px minmax(0,1fr) 30px;gap:14px;align-items:center;padding:24px 4px;cursor:pointer;list-style:none;transition:color .3s}
.at-faq-item summary::-webkit-details-marker{display:none}
.at-faq-idx{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.1em;color:var(--s-accent)}
.at-faq-q{font-weight:700;font-size:clamp(15.5px,1.25vw,17.5px);letter-spacing:-0.015em}
.at-faq-plus{color:var(--s-faint);transition:transform .45s var(--ease-out),color .3s}
.at-faq-plus .at-ic{width:17px;height:17px}
.at-faq-item[open] .at-faq-plus{transform:rotate(45deg);color:var(--s-accent)}
.at-faq-item summary:hover .at-faq-q{color:var(--s-accent)}
.at-faq-a{padding:0 4px 26px 70px;color:var(--s-dim);font-size:15px;max-width:64ch}
@media (max-width:960px){
  .at-faq-grid{grid-template-columns:1fr}
  .at-faq .at-shead{position:static}
  .at-faq-a{padding-left:4px}
}
/* §footer */
.at-footer{padding:clamp(60px,7.5vw,100px) 0 30px;background:var(--s-bg);color:var(--s-ink)}
.at-footer-top{display:flex;flex-direction:column;gap:24px;padding-bottom:clamp(40px,5vw,64px)}
.at-footer-mark{width:52px;height:auto;opacity:.9}
.at-footer-word{font-family:var(--font-display);font-weight:760;font-size:clamp(1.7rem,4.4vw,3.3rem);line-height:1.3;letter-spacing:-0.035em;max-width:24ch}
.at-footer-word .at-em{color:var(--s-accent);font-style:normal}
.at-footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:34px;padding-block:40px;border-top:var(--border-w) solid var(--s-line)}
.at-footer-h{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.22em;color:var(--s-faint);margin-bottom:16px}
.at-footer-a{display:block;padding:5px 0;font-size:14.5px;color:var(--s-dim);transition:color .3s,transform .3s var(--ease-out)}
.at-footer-a:hover{color:var(--s-accent);transform:translateX(4px)}
.at-footer-p{font-size:13.5px;color:var(--s-dim);padding:4px 0}
.at-footer-bot{display:flex;justify-content:space-between;align-items:center;gap:16px;border-top:var(--border-w) solid var(--s-line);padding-top:26px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--s-faint)}
.at-footer-top-btn{display:inline-flex;align-items:center;gap:7px;color:var(--s-dim)}
.at-footer-top-btn .at-ic{width:13px;height:13px}
.at-footer-top-btn:hover{color:var(--s-accent)}
@media (max-width:720px){.at-footer-grid{grid-template-columns:1fr 1fr}.at-footer-bot{flex-direction:column;align-items:flex-start}}
/* §dock */
.at-dock{position:fixed;bottom:0;left:0;right:0;z-index:990;display:none;grid-auto-flow:column;grid-auto-columns:1fr;
  background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-top:1px solid var(--line-strong);padding-bottom:env(safe-area-inset-bottom)}
.at-dock a{display:flex;flex-direction:column;align-items:center;gap:5px;padding:11px 6px 9px;font-size:11px;font-weight:700;color:var(--ink-dim)}
.at-dock a .at-ic{width:19px;height:19px}
.at-dock a.is-primary{background:var(--accent);color:var(--accent-on)}
@media (max-width:720px){.at-dock{display:grid} body{padding-bottom:64px}}