/* VISION-PARTS — blog.css
 * 블로그 목록(/blog/)과 글(/blog/<slug>/) 전용.
 * core.css 의 토큰만 쓰고, 다른 CSS 파일의 선택자와 겹치지 않는다
 * (tools/vp_css_check.py 가 강제하는 불변식).
 * 로드 순서: core -> components -> page -> blog
 */

/* ───────── 목록 ───────── */
.blog-list{padding:72px 0 96px;background:var(--bg-soft)}
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}

.blog-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.blog-card:hover{transform:translateY(-6px);border-color:var(--cyan);
  box-shadow:0 18px 40px rgba(11,31,58,.12)}
.blog-card__link{display:flex;flex-direction:column;height:100%;color:inherit;text-decoration:none}
.blog-card__thumb{aspect-ratio:16/9;overflow:hidden;background:var(--navy-800)}
.blog-card__thumb img{width:100%;height:100%;object-fit:cover;display:block;
  transition:transform .4s ease}
.blog-card:hover .blog-card__thumb img{transform:scale(1.05)}
.blog-card__body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1;gap:10px}
.blog-card__date{font-size:13px;color:var(--gray);font-family:var(--mono);letter-spacing:.02em}
.blog-card__title{font-size:19px;line-height:1.45;font-weight:800;color:var(--ink);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.blog-card__desc{font-size:14.5px;line-height:1.7;color:var(--gray);margin:0;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.blog-card__more{margin-top:auto;padding-top:8px;font-size:14px;font-weight:700;color:var(--blue)}

.blog-empty{text-align:center;padding:80px 20px;background:var(--white);
  border:1px solid var(--line);border-radius:var(--radius)}
.blog-empty__t{font-size:22px;font-weight:800;color:var(--ink);margin:0 0 12px}
.blog-empty__d{font-size:15px;line-height:1.8;color:var(--gray);margin:0 0 28px}

.blog-pager{display:flex;justify-content:center;gap:8px;margin-top:48px;flex-wrap:wrap}
.blog-pager a{min-width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;
  padding:0 12px;border:1px solid var(--line);border-radius:10px;background:var(--white);
  color:var(--gray);font-weight:700;font-size:14px;text-decoration:none;transition:.2s}
.blog-pager a:hover{border-color:var(--cyan);color:var(--blue)}
.blog-pager a.on{background:var(--navy-800);border-color:var(--navy-800);color:var(--white)}

/* ───────── 글 ───────── */
/* 서브페이지(.page-hero)의 틀을 그대로 쓰고 배경 사진만 단색으로 대체한다.
   구조·여백·크럼블 위치가 다른 페이지와 어긋나지 않게 하기 위함. */
.post-hero{background:linear-gradient(160deg,var(--navy-950),var(--navy-700));min-height:330px}
.post-hero .page-hero-inner{padding:150px 0 54px}
.post-hero h1{margin-top:14px;font-size:clamp(25px,3.2vw,40px);line-height:1.35;
  max-width:900px}
.post-hero__meta{display:flex;gap:10px;align-items:center;font-size:14px;color:#9fb4d4;
  font-family:var(--mono);margin:18px 0 0}

.post-wrap{padding:48px 0 96px;background:var(--white)}
.post-wrap .container{max-width:860px}

.post-cover{margin:0 0 36px;border-radius:var(--radius);overflow:hidden}
.post-cover img{width:100%;height:auto;display:block}
.post-cover figcaption{font-size:12.5px;color:var(--gray);padding:10px 2px 0}

.post-toc{background:var(--bg-soft);border:1px solid var(--line);border-radius:14px;
  padding:22px 26px;margin:0 0 36px}
.post-toc h2{font-size:15px;font-weight:800;color:var(--ink);margin:0 0 12px;letter-spacing:.02em}
.post-toc ol{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:7px}
.post-toc li{font-size:14.5px;line-height:1.5}
.post-toc li.lv3{padding-left:14px;font-size:13.5px}
.post-toc a{color:var(--gray);text-decoration:none}
.post-toc a:hover{color:var(--blue);text-decoration:underline}

.post-body{font-size:16.5px;line-height:1.9;color:#2b3443}
.post-body h2{font-size:clamp(21px,2.4vw,27px);font-weight:900;color:var(--ink);
  margin:52px 0 18px;padding-top:6px;scroll-margin-top:96px;word-break:keep-all}
.post-body h3{font-size:19px;font-weight:800;color:var(--ink);margin:34px 0 12px;
  scroll-margin-top:96px;word-break:keep-all}
.post-body img{max-width:100%;height:auto;border-radius:12px;margin:22px 0}
.post-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.post-body th,.post-body td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.post-body th{background:var(--bg-soft);font-weight:800;color:var(--ink)}
.post-body blockquote{margin:24px 0;padding:16px 22px;border-left:4px solid var(--cyan);
  background:var(--bg-soft);border-radius:0 12px 12px 0;color:#3b4657}
.post-body a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}

.post-faq{margin:56px 0 0;border-top:1px solid var(--line);padding-top:40px}
.post-faq h2{font-size:24px;font-weight:900;color:var(--ink);margin:0 0 18px}
.post-faq__item{border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:10px;
  background:var(--white)}
.post-faq__item summary{cursor:pointer;font-weight:700;color:var(--ink);font-size:15.5px;
  list-style:none;line-height:1.6}
.post-faq__item summary::-webkit-details-marker{display:none}
.post-faq__item summary::after{content:'+';float:right;color:var(--cyan);font-weight:900;font-size:18px}
.post-faq__item[open] summary::after{content:'–'}
.post-faq__item>div{padding-top:12px;font-size:15px;line-height:1.8;color:var(--gray)}

.post-cta{margin:56px 0 0;padding:36px 34px;border-radius:var(--radius);
  background:linear-gradient(140deg,var(--navy-900),var(--navy-700));color:var(--white)}
.post-cta__t{font-size:21px;font-weight:900;margin:0 0 10px;word-break:keep-all}
.post-cta__d{font-size:15px;line-height:1.75;color:#c2d4ec;margin:0 0 22px;word-break:keep-all}
.post-cta__btns{display:flex;gap:12px;flex-wrap:wrap}
.post-cta__btns .btn-line{background:transparent;color:var(--white);border-color:rgba(255,255,255,.45)}
.post-cta__btns .btn-line:hover{background:rgba(255,255,255,.1);border-color:var(--cyan);color:var(--white)}

.post-rel{margin:52px 0 0;border-top:1px solid var(--line);padding-top:32px}
.post-rel h2{font-size:18px;font-weight:800;color:var(--ink);margin:0 0 14px}
.post-rel ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.post-rel a{color:var(--gray);text-decoration:none;font-size:15.5px;line-height:1.6}
.post-rel a:hover{color:var(--blue);text-decoration:underline}

.post-back{margin-top:40px}
.post-back a{color:var(--gray);text-decoration:none;font-size:15px;font-weight:700}
.post-back a:hover{color:var(--blue)}

@media (max-width:1100px){
  .blog-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .blog-list{padding:52px 0 72px}
  .blog-grid{grid-template-columns:1fr;gap:20px}
  .post-hero{padding:120px 0 40px}
  .post-wrap{padding:34px 0 72px}
  .post-body{font-size:16px}
  .post-toc{padding:18px 20px}
  .post-cta{padding:28px 22px}
  .post-cta__btns{flex-direction:column}
  .post-cta__btns .btn-primary,.post-cta__btns .btn-line{width:100%}
  .post-body table{display:block;overflow-x:auto;white-space:nowrap}
}