/* One public theme and page frame for the profile, categories and articles. */
:root{--ink:#173454;--muted:#607590;--line:#dce6f3;--paper:#fff;--accent:#2563b8;--surface:#f8fbff;--selected:#edf4ff}
html{scrollbar-gutter:stable}
body{background:var(--paper);color:var(--ink)}
/* Reading pages keep a gentle warm canvas; the shared blue UI stays unchanged. */
body.reading-page{background:#fbfbf7;--surface:#f6f7f2}
body.reading-page .post-card,body.reading-page .post-sidebar{background:#fff}
body .site-header{position:fixed;top:0;left:50%;transform:translateX(-50%);width:100%;max-width:1200px;height:76px;min-height:76px;margin:0;padding:0 32px;z-index:40;background:#ffffff;backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
body .site-header .brand{font-family:Inter,'Noto Sans KR',sans-serif;font-size:25px;font-weight:700;letter-spacing:-1px;white-space:nowrap}
body .site-header .brand small{font-size:13px;color:var(--accent)}
body main.page-main{max-width:1200px;margin:76px auto 0;padding:128px 32px 90px}
body footer{max-width:1136px;border-color:var(--line);color:var(--muted)}
.category-nav>.category-tree>li>.nav-panel{background:var(--paper);border-color:var(--line);box-shadow:0 12px 28px #17345414}
.post-card{border-radius:12px;background:var(--paper);border-color:var(--line);transition:transform .2s,border-color .2s}
.post-card:hover{transform:translateY(-3px);border-color:#9cbee8}
.post-card h2,.post-card h3{font-family:inherit;font-size:24px;font-weight:600;line-height:1.5;letter-spacing:-.5px}
.page-title h1,.article h1{font-family:inherit;font-size:clamp(30px,4vw,46px);font-weight:700;line-height:1.4;letter-spacing:-1.2px;overflow-wrap:anywhere}
.page-title{padding-bottom:30px}.page-title>.eyebrow{margin:0 0 10px;color:var(--accent)}
.empty{border:1px solid var(--line);border-radius:12px;background:var(--surface);font-size:15px}
.record-category>summary:hover,.record-subcategories .record-category,.sidebar-posts a:hover,.sidebar-category:hover{background:var(--surface)}
.sidebar-posts a.is-active,.sidebar-category.is-active{background:var(--selected);color:var(--accent)}
.post-sidebar{top:100px;background:var(--paper);border-color:var(--line)}
.post-sidebar nav{max-height:calc(100dvh - 152px)}
.sidebar-disclosure>summary{background:var(--surface)}
.reading-layout{grid-template-columns:240px minmax(0,1fr);gap:36px}
.article-body blockquote{background:var(--surface);border-color:var(--accent)}
.article-body pre{background:#173454;border-radius:8px}
.post-series{margin-top:56px;padding:24px;border:1px solid var(--line);border-radius:12px;background:#fff;font-size:15px}
.post-series h2{margin:0 0 18px;font-size:23px}.post-series ol{list-style:none;padding:0;margin:0}.post-series li{padding-left:calc(min(var(--depth),4)*12px)}
.post-series li a{display:flex;gap:12px;align-items:baseline;overflow-wrap:anywhere;padding:10px;border-radius:8px;text-decoration:none}.post-series li a>span{color:var(--muted);flex:0 0 22px}.post-series a[aria-current=page]{background:var(--selected);color:var(--accent);font-weight:600}.post-series small{margin-left:auto;white-space:nowrap;font-size:12px}.series-navigation{display:flex;gap:16px;justify-content:space-between;border-top:1px solid var(--line);margin-top:18px;padding-top:18px}.series-navigation a{max-width:48%;font-size:13px;color:var(--accent);text-decoration:none}.series-navigation span{display:block;color:var(--ink);font-size:15px;overflow-wrap:anywhere}.series-next{margin-left:auto;text-align:right}
.article-body{overflow-wrap:anywhere}.article-body table{display:block;max-width:100%;overflow:auto}
@media(min-width:1000px){body.post-page main.page-main{max-width:1600px}.post-page .reading-layout .article{max-width:none;margin:0}}
.article-image-trigger{display:block;max-width:100%;width:fit-content;padding:0;margin:24px auto;border:0;background:transparent;cursor:zoom-in;border-radius:8px}
.article-body .article-image-trigger img{margin:0;max-width:100%;height:auto}
.article-image-trigger:focus-visible{outline:3px solid var(--accent);outline-offset:5px}
.image-viewer{width:calc(100vw - 48px);max-width:none;height:calc(100dvh - 48px);max-height:none;margin:24px;padding:0;border:1px solid var(--line);border-radius:16px;background:#fff;color:var(--ink);overflow:hidden}
.image-viewer::backdrop{background:#17345488;backdrop-filter:blur(3px)}
.image-viewer[open]{display:flex;flex-direction:column}
.image-viewer-toolbar{display:flex;align-items:center;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line);flex-shrink:0}
.image-viewer-title{margin:0 auto 0 0;font-size:15px;font-weight:600;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.image-viewer button{font:inherit;font-size:14px;cursor:pointer;border:1px solid var(--line);border-radius:8px;padding:7px 12px;background:#f4f8ff;color:var(--accent);white-space:nowrap}
.image-viewer-content{flex:1;min-height:0;overflow:auto;padding:24px;text-align:center;overscroll-behavior:contain}
.image-viewer-content img{display:block;margin:auto;max-width:none;max-height:none;width:auto;height:auto;object-fit:contain}
.image-viewer.is-original .image-viewer-content img{max-width:none;max-height:none}
.image-viewer.image-viewer{box-sizing:border-box;width:100vw;height:100dvh;margin:0;border:0;border-radius:0}
.image-viewer-toolbar{flex-wrap:wrap}
.image-viewer-status{min-width:42px;text-align:center;font-size:13px;font-variant-numeric:tabular-nums}
.image-viewer-toolbar a{font-size:13px;color:var(--accent);white-space:nowrap}
.article-image-trigger::after{content:'클릭해서 크게 보기 ↗';display:block;padding-top:8px;font-size:12px;color:var(--accent);text-align:center}
@media(max-width:650px){.image-viewer-title{flex-basis:100%}}
@media(max-width:650px){.image-viewer{width:calc(100vw - 16px);height:calc(100dvh - 16px);margin:8px;border-radius:12px}.image-viewer-toolbar{padding:10px;gap:6px}.image-viewer-title{font-size:13px}.image-viewer button{font-size:12px;padding:7px 9px}.image-viewer-content{padding:12px}}
.subcategories a{background:var(--surface);border-color:var(--line);color:var(--accent)}
@media(max-width:900px){.reading-layout{grid-template-columns:220px minmax(0,1fr);gap:24px}}
@media(max-width:650px){
  body .site-header{left:0;transform:none;max-width:none;padding:0 22px}
  body main.page-main{margin-top:76px;padding:25px 22px 60px}
  .reading-layout{grid-template-columns:1fr;gap:28px}
  .post-sidebar{position:static}.post-sidebar nav{max-height:280px}
  .post-card{padding:22px}.post-card h2,.post-card h3{font-size:22px}
  .reading-layout .article h1{font-size:32px}
}
@media(prefers-reduced-motion:reduce){.post-card{transition:none}}
@media print{body .site-header{position:static;transform:none}body main.page-main{margin-top:0;padding-top:24px}}

/* Blend from the previous page's canvas, keeping the shared header steady. */
html.page-arriving body{animation:canvas-arrive 320ms ease-in-out}
html.page-arriving .page-main{animation:content-arrive 260ms ease-out}
@keyframes canvas-arrive{from{background-color:var(--arrival-color)}}
@keyframes content-arrive{from{opacity:.75;transform:translateY(3px)}to{opacity:1;transform:translateY(0)}}
@media(prefers-reduced-motion:reduce){html.page-arriving body,html.page-arriving .page-main{animation:none}}