/*════════════════════════════════════════════════════════
  Machinist's Tools — Blog stylesheet
  Shared by /blog/index.html and every article page.
════════════════════════════════════════════════════════*/
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0d1117;--surf:#161b25;--card:#1c2333;--bdr:#253047;
  --amber:#f59e0b;--blue:#3b82f6;--green:#22c55e;--purple:#a855f7;--red:#ef4444;
  --text:#e2e8f0;--muted:#7b8fa8;--radius:10px;
  --shadow:0 4px 24px rgba(0,0,0,.5);
  --maxw:1280px;
}
html{scroll-behavior:smooth}
body{font-family:'Segoe UI',system-ui,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;font-size:15px;line-height:1.7}

/*──────────────────────────────────────
  TOPBAR / LOGO (matches main site)
──────────────────────────────────────*/
.topbar{background:rgba(13,17,23,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--bdr);position:sticky;top:0;z-index:200}
.topbar-inner{max-width:var(--maxw);margin:0 auto;padding:0 1rem;display:flex;align-items:center;justify-content:space-between;height:54px}
.logo{display:flex;align-items:center;gap:.55rem;color:var(--amber);font-weight:800;font-size:1.05rem;text-decoration:none;letter-spacing:.01em}
.logo svg{width:28px;height:28px;flex-shrink:0}
.back-link{color:var(--muted);text-decoration:none;font-size:.85rem;font-weight:600}
.back-link:hover{color:var(--text)}

/*──────────────────────────────────────
  BLOG HERO (hub page only)
──────────────────────────────────────*/
.blog-hero{background:var(--surf);border-bottom:1px solid var(--bdr);padding:2.5rem 1rem 2rem;text-align:center;position:relative;overflow:hidden}
.blog-hero-badge{display:inline-block;background:rgba(245,158,11,.1);color:var(--amber);border:1px solid rgba(245,158,11,.25);font-size:.7rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:.28rem .8rem;border-radius:20px;margin-bottom:.9rem}
.blog-hero h1{font-size:clamp(1.7rem,4.5vw,2.5rem);font-weight:800;margin-bottom:.6rem}
.blog-hero h1 span{color:var(--amber)}
.blog-hero p{color:var(--muted);max-width:560px;margin:0 auto;font-size:.92rem}

/*──────────────────────────────────────
  SHELL: SIDEBAR + MAIN
──────────────────────────────────────*/
.blog-shell{max-width:var(--maxw);margin:0 auto;padding:2rem 1rem 3rem;display:flex;gap:2rem;align-items:flex-start}
.blog-sidebar{width:250px;flex-shrink:0;position:sticky;top:78px}
.blog-main{flex:1;min-width:0}

.side-all-link{display:inline-flex;align-items:center;gap:.4rem;color:var(--amber);text-decoration:none;font-size:.85rem;font-weight:700;margin-bottom:1.25rem}
.side-all-link:hover{text-decoration:underline}

.side-block{background:var(--card);border:1px solid var(--bdr);border-radius:var(--radius);padding:1.1rem;margin-bottom:1.25rem}
.side-block h4{font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin-bottom:.75rem}

.side-cats{display:flex;flex-direction:column;gap:.3rem}
.side-cat{display:flex;align-items:center;justify-content:space-between;gap:.5rem;padding:.5rem .6rem;border-radius:7px;color:var(--muted);text-decoration:none;font-size:.85rem;font-weight:600;transition:background .15s,color .15s}
.side-cat:hover{background:var(--surf);color:var(--text)}
.side-cat.active{background:rgba(245,158,11,.12);color:var(--amber)}
.side-cat .count{font-size:.7rem;color:var(--muted);background:var(--surf);padding:.1rem .45rem;border-radius:10px}
.side-cat.active .count{color:var(--amber);background:rgba(245,158,11,.15)}

.side-recent{display:flex;flex-direction:column;gap:.85rem}
.side-recent-item{display:block;text-decoration:none}
.side-recent-title{font-size:.82rem;font-weight:700;color:var(--text);line-height:1.4;margin-bottom:.2rem}
.side-recent-item:hover .side-recent-title{color:var(--amber)}
.side-recent-meta{font-size:.7rem;color:var(--muted)}
.side-recent-item.active .side-recent-title{color:var(--amber)}

/*──────────────────────────────────────
  ARTICLE GRID + CARDS (hub)
──────────────────────────────────────*/
.blog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1.25rem}
.blog-card{
  background:var(--card);border:1px solid var(--bdr);border-radius:var(--radius);
  padding:1.25rem;text-decoration:none;color:inherit;
  display:flex;flex-direction:column;box-shadow:var(--shadow);
  transition:border-color .2s,transform .2s;
}
.blog-card:hover{border-color:rgba(245,158,11,.4);transform:translateY(-2px)}
.blog-cat{
  display:inline-block;align-self:flex-start;font-size:.66rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.07em;padding:.22rem .6rem;border-radius:4px;
  margin-bottom:.75rem;
}
.blog-card-title{font-size:1rem;font-weight:700;margin-bottom:.5rem;line-height:1.35;color:var(--text)}
.blog-card-excerpt{font-size:.83rem;color:var(--muted);line-height:1.55;flex:1;margin-bottom:.9rem}
.blog-card-meta{font-size:.74rem;color:var(--muted);display:flex;gap:.5rem;align-items:center;padding-top:.7rem;border-top:1px solid var(--bdr)}
.blog-card-meta .dot{opacity:.5}
.blog-empty{color:var(--muted);font-size:.9rem;padding:2rem 0;text-align:center;display:none}

.cat-threading{background:rgba(245,158,11,.12);color:var(--amber)}
.cat-milling{background:rgba(59,130,246,.12);color:var(--blue)}
.cat-turning{background:rgba(34,197,94,.12);color:var(--green)}
.cat-setup{background:rgba(168,85,247,.12);color:var(--purple)}
.cat-measuring{background:rgba(239,68,68,.12);color:var(--red)}
.cat-general{background:rgba(123,143,168,.18);color:var(--muted)}

/*──────────────────────────────────────
  ARTICLE PAGE
──────────────────────────────────────*/
.article-back{display:inline-flex;align-items:center;gap:.4rem;color:var(--muted);text-decoration:none;font-size:.83rem;font-weight:600;margin-bottom:1.5rem}
.article-back:hover{color:var(--amber)}
.article-header{margin-bottom:1.5rem;padding-bottom:1.25rem;border-bottom:1px solid var(--bdr)}
.article-header h1{font-size:clamp(1.4rem,3.2vw,2rem);font-weight:800;margin:.7rem 0 .6rem;line-height:1.3}
.article-meta{font-size:.8rem;color:var(--muted);display:flex;gap:.55rem;align-items:center}
.article-meta .dot{opacity:.5}

.article-diagram{background:var(--card);border:1px solid var(--bdr);border-radius:var(--radius);padding:1.25rem;margin-bottom:1.75rem;box-shadow:var(--shadow);max-width:700px}
.article-diagram svg{width:100%;height:auto;display:block}
.article-diagram figcaption{font-size:.78rem;color:var(--muted);text-align:center;margin-top:.85rem}

.article-body{font-size:.97rem;line-height:1.8;color:var(--text);max-width:700px}
.article-body h3{font-size:1.1rem;font-weight:700;margin:1.6rem 0 .65rem;color:var(--amber)}
.article-body p{margin-bottom:1.1rem}
.article-body ul,.article-body ol{margin:0 0 1.2rem 1.3rem;display:flex;flex-direction:column;gap:.45rem}
.article-body li{padding-left:.3rem}
.article-body strong{color:var(--amber)}
.article-body em{color:var(--muted)}
.article-body .callout{
  background:var(--surf);border-left:3px solid var(--amber);border-radius:6px;
  padding:.9rem 1.1rem;margin:1.4rem 0;font-size:.86rem;color:var(--muted);
}
.article-body a{color:var(--amber);text-decoration:none}
.article-body a:hover{text-decoration:underline}

.related-block{margin-top:2.5rem;padding-top:1.75rem;border-top:1px solid var(--bdr);max-width:700px}
.related-block h3{font-size:.8rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:1rem}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem}
.related-card{display:block;background:var(--card);border:1px solid var(--bdr);border-radius:8px;padding:.9rem 1rem;text-decoration:none;transition:border-color .2s}
.related-card:hover{border-color:rgba(245,158,11,.4)}
.related-card-title{font-size:.83rem;font-weight:700;color:var(--text);line-height:1.4}
.related-card:hover .related-card-title{color:var(--amber)}

/*──────────────────────────────────────
  ADSENSE BLOCKS
──────────────────────────────────────*/
.ad-slot{
  background:var(--surf);border:1px dashed var(--bdr);border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  color:var(--muted);font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;
  overflow:hidden;position:relative;
}
.ad-slot::before{
  content:'Advertisement';position:absolute;top:5px;left:9px;
  font-size:.6rem;color:var(--muted);opacity:.55;letter-spacing:.06em;
}
.ad-banner{max-width:var(--maxw);margin:0 auto;padding:0 1rem}
.ad-banner .ad-slot{min-height:90px;max-width:728px;width:100%;margin:1.75rem auto}

/*──────────────────────────────────────
  GDPR CONSENT BAR (shared)
──────────────────────────────────────*/
.consent-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:500;
  background:var(--card);border-top:1px solid var(--bdr);
  box-shadow:0 -6px 28px rgba(0,0,0,.55);
  padding:1.1rem 1rem;display:none;
}
.consent-bar.show{display:block}
.consent-inner{
  max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;
  justify-content:space-between;gap:1.5rem;flex-wrap:wrap;
}
.consent-text{font-size:.83rem;color:var(--muted);line-height:1.55;flex:1;min-width:240px}
.consent-text a{color:var(--amber);text-decoration:none}
.consent-text a:hover{text-decoration:underline}
.consent-btns{display:flex;gap:.6rem;flex-shrink:0}
.consent-btns button{
  padding:.65rem 1.25rem;border-radius:7px;font-size:.85rem;font-weight:700;
  cursor:pointer;white-space:nowrap;transition:background .2s,box-shadow .2s,border-color .2s;
}
.consent-reject{background:var(--surf);border:1px solid var(--bdr);color:var(--text)}
.consent-reject:hover{border-color:var(--muted)}
.consent-accept{background:var(--amber);border:none;color:#0d1117}
.consent-accept:hover{background:#fbbf24;box-shadow:0 0 14px rgba(245,158,11,.3)}
@media(max-width:640px){
  .consent-inner{flex-direction:column;align-items:stretch}
  .consent-btns{width:100%}
  .consent-btns button{flex:1}
}

/*──────────────────────────────────────
  FOOTER (shared with main site)
──────────────────────────────────────*/
footer{background:var(--surf);border-top:1px solid var(--bdr);color:var(--muted);font-size:.8rem}
footer strong{color:var(--amber)}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:2.5rem 1.25rem 1.5rem}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:2rem;margin-bottom:1.75rem}
.footer-brand{display:flex;align-items:center;gap:.5rem;color:var(--amber);font-weight:800;font-size:1rem;margin-bottom:.6rem}
.footer-brand svg{width:24px;height:24px}
.footer-desc{font-size:.82rem;line-height:1.6;max-width:320px}
.footer-col h4{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--text);margin-bottom:.7rem}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:.5rem}
.footer-col a{color:var(--muted);text-decoration:none;font-size:.82rem;cursor:pointer;background:none;border:none;text-align:left;padding:0}
.footer-col a:hover{color:var(--amber)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.75rem;padding-top:1.5rem;border-top:1px solid var(--bdr);font-size:.76rem}
.footer-disclaimer{font-size:.76rem;line-height:1.6;color:var(--muted);opacity:.85;margin-bottom:1.25rem;max-width:760px}
@media(max-width:760px){.footer-top{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.footer-top{grid-template-columns:1fr}}

/*──────────────────────────────────────
  RESPONSIVE
──────────────────────────────────────*/
@media(max-width:900px){
  .blog-shell{flex-direction:column}
  .blog-sidebar{width:100%;position:static}
  .side-recent-block{display:none}
  .side-cats{flex-direction:row;flex-wrap:wrap;gap:.5rem}
  .side-cat{flex:0 0 auto}
  .side-cat .count{display:none}
}
@media(max-width:600px){
  .blog-grid{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
}
:target{scroll-margin-top:80px}