/* 동작 페이지(exercise/*.html) — JS 없이 읽히는 정적 문서. tools/gen_seo.mjs 생성물 */
:root{--bg:#0b0d11;--card:#13171e;--card2:#181d26;--line:#232a35;--text:#e6e9ef;--muted:#8a93a3;--accent:#ff4d3a;--radius:14px;
  --font:system-ui,-apple-system,"Apple SD Gothic Neo","Malgun Gothic","Noto Sans KR","Nanum Gothic",sans-serif}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.65}
a{color:#7cc8ff}
.logo{color:var(--accent)}
.sx-top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:12px 18px;border-bottom:1px solid var(--line);background:#0e1116}
.sx-brand{font-weight:800;font-size:17px;color:var(--text);text-decoration:none}
.sx-nav{display:flex;gap:14px;flex-wrap:wrap;font-size:14px}.sx-nav a{color:var(--text);text-decoration:none;opacity:.85}.sx-nav a:hover{opacity:1;text-decoration:underline}
.sx-main{max-width:820px;margin:0 auto;padding:18px 18px 40px}
.sx-crumb{font-size:13px;color:var(--muted)}.sx-crumb a{color:var(--muted)}
h1{font-size:28px;line-height:1.3;margin:10px 0 6px;letter-spacing:-.4px}
h2{font-size:20px;margin:28px 0 10px;padding-top:6px;border-top:1px solid var(--line)}
h3{font-size:16px;margin:0;display:inline}
.sx-en{font-size:.6em;font-weight:500;color:var(--muted);margin-left:6px}
.sx-tags{display:flex;gap:6px;flex-wrap:wrap;margin:6px 0 10px}.sx-tags span{font-size:12px;padding:2px 10px;border-radius:99px;background:var(--card2);border:1px solid var(--line)}
.sx-lead{font-size:17px}
.sx-sub{font-size:13px;color:var(--muted)}
.sx-ctas{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}
.sx-btn{display:inline-flex;align-items:center;min-height:44px;padding:8px 16px;border-radius:10px;background:#232a35;border:1px solid #2e3643;color:var(--text);text-decoration:none;font-weight:700}
.sx-btn.primary{background:linear-gradient(180deg,#ff5a45,#e63e2b);border-color:#ff6a55;color:#fff}
.sx-steps li,.sx-list li{margin:6px 0}
.sx-scroll{overflow-x:auto}
.sx-table{width:100%;border-collapse:collapse;font-size:14px}.sx-table th,.sx-table td{border-bottom:1px solid var(--line);padding:8px 6px;text-align:left;vertical-align:top}
.sx-table thead th{color:var(--muted);font-size:12px}.sx-table tbody th{white-space:nowrap}.sx-table .sx-en{display:block;margin:0;font-size:11px}
.sx-pain{background:#2a1714;border:1px solid #5a2a24;border-radius:10px;padding:10px 12px}
.sx-faq{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px;margin:10px 0}
.sx-faq summary{cursor:pointer}.sx-faq p{margin:8px 0 0}
.sx-cards{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:8px}
.sx-cards a{display:flex;flex-direction:column;padding:10px 12px;border-radius:10px;background:var(--card);border:1px solid var(--line);color:var(--text);text-decoration:none;min-height:44px}
.sx-cards a:hover{border-color:#3b4555}.sx-cards span{font-size:12px;color:var(--muted)}
.sx-jump{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.sx-jump a{font-size:13px;padding:4px 10px;border-radius:99px;background:var(--card2);border:1px solid var(--line);color:var(--text);text-decoration:none}
.sx-cta{margin-top:28px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:4px 16px 8px}.sx-cta h2{border:0}
.sx-foot{border-top:1px solid var(--line);padding:16px 18px 28px;font-size:13px;color:var(--muted);max-width:820px;margin:0 auto}
.sx-disc{color:#ffcf99}
@media (max-width:600px){h1{font-size:23px}.sx-main{padding:14px 14px 32px}}
.sx-table td:nth-child(2),.sx-table td:nth-child(3),.sx-table thead th{white-space:nowrap}

/* 동작 쇼츠 임베드(퍼사드) — js/shorts_embed.js */
.vshort{margin:12px 0}
.vshort-bar{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.vshort-btn{min-height:44px;padding:8px 16px;border-radius:10px;border:1px solid #ff6a55;background:linear-gradient(180deg,#ff5a45,#e63e2b);color:#fff;font:inherit;font-weight:700;cursor:pointer}
.vshort-btn[hidden],.vshort-stage[hidden],.vshort-note[hidden]{display:none}
.vshort-link{font-size:14px}
.vshort-stage{margin:12px 0 4px}
.vshort-frame{position:relative;width:min(100%,320px);aspect-ratio:9/16;margin:0 auto;border-radius:12px;overflow:hidden;background:#000 center/cover no-repeat}
.vshort-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.vshort-note{margin:8px 0 0;font-size:13px;color:#ffb4a8}

/* 운동 가이드 블로그(blog/*.html) — tools/gen_blog.mjs 생성물 (t_e33bf83b) */
.bx-answer{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:var(--radius);padding:4px 16px;margin:12px 0}
.bx-answer p{font-size:17px}
.bx-follow{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;margin:14px 0}.bx-follow .sx-sub{margin:0}
/* 하단 챌린지 시작 카드·모바일 가독성 (t_2671983b) */
.bx-follow-end{margin:28px 0 18px;padding:16px;border-radius:var(--radius);background:rgba(24,29,38,.72);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,77,58,.35)}
.bx-follow-h{flex-basis:100%;margin:0;font-size:17px;font-weight:700;color:var(--text)}
@media (max-width:600px){.bx-follow{flex-direction:column;align-items:stretch;text-align:center}.bx-follow-btn{display:flex;align-items:center;justify-content:center;width:100%;min-height:48px;font-size:16px;box-sizing:border-box}.bx-follow .sx-sub{font-size:14px}}
.bx-disclosure{font-size:13px;color:#ffcf99;background:#1f1a12;border:1px solid #4a3a20;border-radius:10px;padding:8px 12px;margin:6px 0}
.bx-cards span{display:block}
/* 블로그 대표 이미지·동작 루프 (t_a49974a1) */
.bx-hero{margin:12px 0;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:#141a23}
.bx-hero img{display:block;width:100%;height:auto;aspect-ratio:1200/630}
.bx-loop{margin:10px auto;max-width:360px;text-align:center}
.bx-loop img{display:block;width:100%;height:auto;aspect-ratio:1;border-radius:var(--radius);border:1px solid var(--line);background:#141a23}
.bx-loop figcaption{font-size:13px;color:var(--muted);margin-top:6px}
.bx-thumb{display:block;width:calc(100% + 24px);height:auto;aspect-ratio:1200/630;object-fit:cover;margin:-10px -12px 8px;border-radius:10px 10px 0 0}
.bx-gear-list{list-style:none;padding:0;margin:8px 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}
.bx-gear-list a{display:flex;flex-direction:column;gap:6px;height:100%;padding:12px;border-radius:18px;background:rgba(255,255,255,.05);backdrop-filter:blur(24px) saturate(140%);-webkit-backdrop-filter:blur(24px) saturate(140%);border:1px solid rgba(255,255,255,.1);color:var(--text);text-decoration:none;transition:border-color .15s,transform .15s}
.bx-gear-list a:hover,.bx-gear-list a:focus-visible{border-color:rgba(99,102,241,.6);transform:translateY(-1px)}
.bx-gear-img{display:block;width:100%;aspect-ratio:1;border-radius:10px;background:#fff;overflow:hidden}.bx-gear-img img{width:100%;height:100%;object-fit:contain}
.bx-gear-t{font-size:14px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.bx-gear-p{font-size:15px;font-weight:700}.bx-gear-p small{font-weight:400;font-size:12px;color:#7cc8ff}
.bx-gear-btn{margin-top:auto;display:flex;align-items:center;justify-content:center;min-height:40px;border-radius:12px;background:linear-gradient(135deg,#6366f1,#0ea5c6);box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 8px 18px -8px rgba(79,70,229,.8);color:#fff;font-size:14px;font-weight:700;transition:transform .1s}
.bx-gear-list a:active .bx-gear-btn{transform:translateY(1px) scale(.98)}
.bx-gear-mid{margin:22px 0;padding:10px 12px;border-radius:18px;background:rgba(255,255,255,.04);backdrop-filter:blur(24px) saturate(140%);-webkit-backdrop-filter:blur(24px) saturate(140%);border:1px solid rgba(255,255,255,.1)}
.bx-gear-mid .bx-gear-list a{flex-direction:row;align-items:center;flex-wrap:wrap}.bx-gear-mid .bx-gear-img{width:72px;flex:none}.bx-gear-mid .bx-gear-t{flex:1;min-width:120px}.bx-gear-mid .bx-gear-btn{flex-basis:100%}