/* base.css · 리셋·타이포·유틸 (01 이후 페이지 공용, ADR-0013) */
@font-face{
  font-family:"Pretendard Variable";
  src:url("assets/fonts/PretendardVariable.woff2") format("woff2-variations");
  font-style:normal;font-weight:45 920;font-display:swap;
}
@font-face{
  font-family:"Inter Variable";
  src:url("assets/fonts/InterVariable.woff2") format("woff2-variations");
  font-style:normal;font-weight:100 900;font-display:swap;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto} *{transition:none!important;animation:none!important} }
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:"Pretendard Variable",Pretendard,"Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",sans-serif;
  font-size:16px; line-height:1.6; -webkit-font-smoothing:antialiased;
  transition:background var(--dur-theme) var(--ease-out), color var(--dur-theme) var(--ease-out);
}
.latin,:lang(en){font-family:"Inter Variable","Helvetica Neue",Arial,sans-serif}
.num{font-variant-numeric:tabular-nums lining-nums}
.mono{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* 타입 램프 */
.t-display{font-size:var(--fs-display);font-weight:var(--fw-display);letter-spacing:-.02em;line-height:1.25}
.t-h1{font-size:32px;font-weight:700;letter-spacing:-.015em;line-height:1.3}
.t-h2{font-size:24px;font-weight:700;line-height:1.35}
.t-h3{font-size:20px;font-weight:600;line-height:1.4}
.t-body{font-size:16px;line-height:1.6;max-width:65ch}
.t-label{font-size:14px;font-weight:500}
.t-caption{font-size:13px;color:var(--text-2)}

/* 상단 컨트롤 바 + 스위처 */
.bar{position:sticky;top:0;z-index:10;background:var(--header-bg);color:var(--header-fg);box-shadow:var(--shadow-2)}
.bar-in{max-width:1240px;margin:0 auto;padding:12px 24px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
@media (max-width:599px){.bar-in{padding:10px 16px;gap:8px}.bar .ttl{font-size:13.5px}}
.bar .ttl{font-weight:800;font-size:15px;letter-spacing:-.01em;margin-right:auto}
.bar .ttl small{display:block;font-weight:500;font-size:11.5px;opacity:.75;letter-spacing:.02em}
.seg{display:flex;background:var(--seg-bg);border-radius:var(--radius-pill);padding:3px;gap:2px}
.seg button{appearance:none;border:0;background:transparent;color:inherit;cursor:pointer;font:inherit;font-size:13px;font-weight:600;padding:5px 14px;border-radius:var(--radius-pill);transition:background var(--dur-fast) var(--ease-out)}
.seg button[aria-pressed="true"]{background:var(--seg-active-bg);color:var(--seg-active-fg)}
.seg button:focus-visible{outline:2px solid var(--header-fg);outline-offset:2px}

/* 페이지 골격 */
.wrap{max-width:1240px;margin:0 auto;padding:0 24px 96px}
section{margin-top:56px}
.sec-h{display:flex;align-items:baseline;gap:12px;border-bottom:2px solid var(--line-strong);padding-bottom:10px;margin-bottom:18px}
.sec-h .no{font-size:12px;font-weight:800;color:var(--primary);letter-spacing:.08em}
.sec-h h2{margin:0;font-size:21px;font-weight:800;letter-spacing:-.01em}
.sec-h .note{margin-left:auto;font-size:12.5px;color:var(--text-3)}
.rule{font-size:13.5px;color:var(--text-2);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:10px 14px;margin:0 0 16px;max-width:900px}
.rule b{color:var(--text)}
footer{margin-top:72px;border-top:2px solid var(--line-strong);padding-top:16px;font-size:12.5px;color:var(--text-3)}

/* 시안별 레이아웃 분기 (완전 분기 화면 전용 · ADR-0001 매트릭스) */
[data-theme="A"] .only-b{display:none!important}
[data-theme="B"] .only-a{display:none!important}

/* 4조합 병렬 스코프 그리드 */
.quad{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:12px;margin-bottom:8px}
.quad > *{min-width:0}
.scope{border:1px solid var(--line);border-radius:10px;padding:16px;position:relative}
.scope::before{content:attr(data-label);display:block;font-size:10.5px;font-weight:800;letter-spacing:.08em;opacity:.55;margin-bottom:12px}