/*
Theme Name: QC Blog (Substack style)
Theme URI: https://www.qualitychampion.eu/blog/
Author: QualityChampion
Description: Clean, Substack-style blog theme for QualityChampion with navigation back to the main site.
Version: 1.0
Text Domain: qc-blog
*/
:root{--ink:#10233A;--soft:#4B6178;--line:#CFE0F1;--accent:#1F6FDB;--accent-d:#0B5CAD;--bg:#EEF5FD;--chip:#DCEBFA;--card:#fff;--display:'Bricolage Grotesque','Public Sans',system-ui,sans-serif}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:'Public Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;font-size:18px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%;height:auto}
.wrap{max-width:728px;margin:0 auto;padding:0 20px}
.site-head{position:sticky;top:0;z-index:50;background:rgba(238,245,253,.96);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.top{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px;padding:10px 20px;max-width:1100px;margin:0 auto}
.brand{justify-self:center;font-weight:700;font-size:20px;letter-spacing:-.01em;text-decoration:none;color:var(--ink);text-align:center}
.top .l{justify-self:start}.top .r{justify-self:end;display:flex;gap:8px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:999px;font-size:14px;font-weight:600;text-decoration:none;border:1px solid var(--line);color:var(--ink);background:#fff;line-height:1.2;cursor:pointer;font-family:inherit}
.btn:hover{border-color:#bbb;background:var(--chip)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:hover{background:var(--accent-d);border-color:var(--accent-d)}
.nav{border-top:1px solid var(--line);overflow-x:auto;-webkit-overflow-scrolling:touch}
.nav ul{list-style:none;margin:0 auto;padding:0 12px;display:flex;justify-content:center;gap:4px;max-width:1100px;white-space:nowrap}
.nav a{display:block;padding:11px 12px;font-size:14px;font-weight:500;text-decoration:none;color:var(--ink);border-bottom:2px solid transparent}
.nav a:hover{color:var(--accent)}
.nav a.on{font-weight:700;border-bottom-color:var(--ink)}
main{padding:28px 0 60px}
.page-title{font-size:15px;font-weight:600;color:var(--soft);text-transform:uppercase;letter-spacing:.05em;margin:0 0 18px}
.item{display:grid;grid-template-columns:1fr 124px;gap:20px;padding:18px 20px;margin:0 0 14px;background:var(--card);border:1px solid var(--line);border-radius:14px;align-items:start}.item:hover{border-color:var(--accent)}
.item.nothumb{grid-template-columns:1fr}
.item h2{margin:0 0 6px;font-size:21px;line-height:1.25;letter-spacing:-.01em;font-weight:700}
.item h2 a{text-decoration:none}.item h2 a:hover{text-decoration:underline}
.item p{margin:0 0 8px;color:var(--soft);font-size:15.5px;line-height:1.45}
.meta{font-size:12px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--soft)}
.meta a{text-decoration:none}.meta a:hover{text-decoration:underline}
.thumb{display:block;width:124px;height:124px;border-radius:6px;overflow:hidden;background:var(--chip)}
.thumb img{width:100%;height:100%;object-fit:cover;display:block}
.month{font-size:12px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--accent-d);margin:30px 0 4px}
.arch{display:flex;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.arch a{font-weight:600;text-decoration:none;font-size:17px}.arch a:hover{text-decoration:underline}
.arch time{font-size:12px;color:var(--soft);white-space:nowrap;text-transform:uppercase;font-weight:600;padding-top:4px}
.pager{display:flex;justify-content:space-between;margin-top:26px}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:8px 26px 14px}.card .arch:last-child{border-bottom:0}
.post .cat{font-size:12px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--soft);text-decoration:none}
.post .cat:hover{color:var(--accent)}
.post h1{font-size:36px;line-height:1.15;letter-spacing:-.02em;font-weight:800;margin:8px 0 12px}
.post .sub{font-size:19px;line-height:1.4;color:var(--soft);margin:0 0 20px}
.by{display:flex;align-items:center;gap:10px;margin:0 0 18px}
.by img{width:36px;height:36px;border-radius:50%;object-fit:cover}
.by b{display:block;font-size:12px;letter-spacing:.04em;text-transform:uppercase}
.by span{font-size:12px;color:var(--soft);text-transform:uppercase;letter-spacing:.03em}
.actions{display:flex;flex-wrap:wrap;gap:8px;padding:12px 0;margin:0 0 22px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.actions .btn{padding:6px 14px;font-size:13px}
.entry{font-size:18px;line-height:1.65}
.entry>*{max-width:100%}
.entry p{margin:0 0 1.15em}
.entry h2{font-size:28px;line-height:1.2;margin:1.6em 0 .5em;letter-spacing:-.01em}
.entry h3{font-size:22px;line-height:1.25;margin:1.4em 0 .4em}
.entry a{color:var(--accent)}
.entry ul,.entry ol{padding-left:1.3em;margin:0 0 1.15em}.entry li{margin:.25em 0}
.entry hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.entry blockquote{margin:1.2em 0;padding:.2em 0 .2em 1em;border-left:3px solid var(--ink);color:#555}
.entry figure{margin:1.4em 0;text-align:center}.entry figure img{border-radius:4px}
.entry figcaption{font-size:14px;color:var(--soft);margin-top:6px}
.entry code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88em;background:var(--chip);padding:.1em .35em;border-radius:4px}
.entry pre{background:#0f172a;color:#e5edf7;padding:16px 18px;border-radius:8px;overflow-x:auto;font-size:14.5px;line-height:1.55;margin:1.3em 0}
.entry pre code{background:none;padding:0;color:inherit;font-size:inherit}
.endnav{display:flex;flex-wrap:wrap;gap:10px;margin:36px 0 0;padding-top:24px;border-top:1px solid var(--line)}
.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:26px}
.prevnext a{display:block;border:1px solid var(--line);border-radius:10px;padding:14px 16px;text-decoration:none;font-weight:600;font-size:15px;line-height:1.35}
.prevnext a:hover{border-color:#bbb}.prevnext small{display:block;color:var(--soft);font-weight:600;text-transform:uppercase;letter-spacing:.04em;font-size:11px;margin-bottom:4px}
.prevnext .n{text-align:right}
.foot{border-top:1px solid var(--line);padding:26px 20px 40px;text-align:center;color:var(--soft);font-size:14px}
.foot a{color:var(--soft)}.foot nav{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin-bottom:10px}
@media(max-width:640px){
 body{font-size:17px}
 .top{grid-template-columns:auto 1fr auto;padding:8px 12px}
 .brand{font-size:17px}.btn{padding:7px 12px;font-size:13px}
 .nav ul{justify-content:flex-start}
 .post h1{font-size:28px}.post .sub{font-size:17px}
 .item{grid-template-columns:1fr 84px;gap:14px}.thumb{width:84px;height:84px}.item h2{font-size:18px}
 .prevnext{grid-template-columns:1fr}.prevnext .n{text-align:left}
 .hide-s{display:none}
}

.wrap.post{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:32px 36px;max-width:760px}
.post h1,.item h2,.page-title,.entry h2,.entry h3,.brand,.prevnext a{font-family:var(--display)}
.logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font:800 22px/1 var(--display);letter-spacing:-.01em;color:var(--ink)}
.logo svg{width:26px;height:38px;flex:none}.logo:hover{opacity:.85}
@media(max-width:640px){.wrap.post{padding:22px 18px;border-radius:12px;margin:0 12px;width:auto}.logo{font-size:16px;gap:7px}.logo svg{width:19px;height:28px}.item{padding:14px}.card{padding:4px 16px 10px}}