:root{--bg:#10100f;--card:#181a1b;--border:#ffffff30;--border-h:#ffffff50;--text:#fffaf0;--muted:#d6d0c4;--accent:#e9b778;--accent-ink:#17120b;--terracotta:233,183,120;--sans:'Inter',system-ui,sans-serif;--display:'Space Grotesk','Inter',sans-serif}
*{box-sizing:border-box}body{margin:0;font-family:var(--sans);background:var(--bg);color:var(--text);line-height:1.7;position:relative}a{color:inherit} .container{max-width:1080px;margin:0 auto;padding:0 24px}

/* Same paper-grain signature as the homepage's classic pages — just tuned
   for a dark ground (white noise added at low opacity instead of black). */
body::before{content:'';position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.05;mix-blend-mode:overlay;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");background-size:140px 140px}

/* Header/nav — same structure and CSS-only checkbox-hack mobile menu as
   seo-expansion.css (these are static pages, no shared JS bundle), just
   re-themed dark to match the homepage's cinematic journey. */
header{position:sticky;top:0;z-index:50;border-bottom:1px solid var(--border)}
header::before{content:'';position:absolute;inset:0;z-index:-1;background:rgba(16,16,15,.85);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.nav{position:relative;z-index:1;display:flex;justify-content:space-between;align-items:center;padding:18px 0}
header strong{font-family:var(--display);font-size:18px;font-weight:700;letter-spacing:.14em;color:var(--text)}
.links{display:flex;align-items:center;gap:28px;flex-wrap:wrap}.links a{color:var(--muted);font-size:13px;font-weight:500;letter-spacing:.04em;transition:color .2s}.links a:hover{color:var(--text)}
.links a:last-child{color:var(--accent);padding:7px 17px;border-radius:6px;border:1px solid rgba(var(--terracotta),.35);transition:all .2s}
.links a:last-child:hover{background:rgba(var(--terracotta),.1);border-color:var(--accent);color:var(--accent)}
@media (max-width:680px){.links a:last-child{border:none;padding:0;border-radius:0}}

.nav-toggle{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.nav-burger,.nav-close{display:none}
@media (max-width:680px){
  .nav-burger{
    display:flex;flex-direction:column;gap:5px;cursor:pointer;justify-content:center;align-items:center;
    position:fixed;right:18px;bottom:calc(22px + env(safe-area-inset-bottom,0px));z-index:90;
    width:54px;height:54px;border-radius:50%;margin:0;padding:0;
    background:var(--accent);box-shadow:0 10px 26px rgba(0,0,0,.45);
  }
  .nav-burger span{display:block;width:20px;height:2px;background:var(--accent-ink);border-radius:2px}
  .nav-toggle:focus-visible ~ .nav-burger{outline:2px solid var(--accent);outline-offset:3px;border-radius:50%}
  .links{
    position:fixed;inset:0;z-index:100;
    background:rgba(16,16,15,.97);backdrop-filter:blur(10px);
    flex-direction:column;align-items:center;justify-content:center;gap:28px;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .25s ease,transform .25s ease,visibility .25s;
  }
  .links a{font-family:var(--display);font-size:22px;font-weight:600;color:var(--text)}
  .links a:hover{color:var(--accent)}
  .nav-toggle:checked ~ .links{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-close{
    display:block;position:fixed;top:18px;right:20px;z-index:101;
    font-size:26px;line-height:1;color:var(--text);cursor:pointer;
    opacity:0;pointer-events:none;transition:opacity .2s;
  }
  .nav-toggle:checked ~ .nav-close{opacity:1;pointer-events:auto}
  .nav-toggle:focus-visible ~ .nav-close{outline:2px solid var(--accent);outline-offset:2px}
}

main{padding:48px 0;position:relative;z-index:2}
.hero{position:relative;overflow:hidden;padding:24px;border:1px solid var(--border);background:var(--card);border-radius:14px}
.hero::before{content:'';position:absolute;top:-120px;right:-140px;width:320px;height:320px;border-radius:50%;filter:blur(6px);pointer-events:none;z-index:0;background:radial-gradient(circle,rgba(var(--terracotta),.18) 0%,rgba(var(--terracotta),0) 70%);animation:heroAurora 24s ease-in-out infinite}
.hero>*{position:relative;z-index:1}
.hero h1{font-family:var(--display);margin:0 0 10px;color:var(--text);animation:heroRise .7s cubic-bezier(.16,.8,.24,1) both}
.hero p{color:var(--muted);animation:heroRise .7s cubic-bezier(.16,.8,.24,1) .1s both}
@keyframes heroAurora{0%{transform:translate(0,0) scale(1)}50%{transform:translate(-18px,14px) scale(1.08)}100%{transform:translate(0,0) scale(1)}}
@keyframes heroRise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}}

section{margin-top:34px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.card{padding:16px;border:1px solid var(--border);background:var(--card);border-radius:12px;transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease}
.card:hover{transform:translateY(-3px);border-color:var(--border-h);box-shadow:0 10px 28px rgba(0,0,0,.35)}
.card h3{margin-top:0;color:var(--text)}

/* ── vertical timeline (blog index) ──────────────────────
   A center spine with alternating left/right entries on
   desktop; collapses to a single left-aligned rail on
   narrow screens. Reveal motion is handled by reveal.js
   adding .tl-item to the shared .seo-fu-js/.on mechanism —
   see the nth-child transform overrides below for the
   left/right slide direction. */
.timeline{position:relative;display:flex;flex-direction:column;gap:30px;padding:10px 0}
.timeline::before{content:'';position:absolute;top:0;bottom:0;left:50%;width:2px;background:var(--border);transform:translateX(-50%)}
.tl-item{position:relative;display:flex;width:100%}
.tl-item:nth-child(odd){justify-content:flex-start}
.tl-item:nth-child(even){justify-content:flex-end}
.tl-dot{position:absolute;top:24px;left:50%;width:12px;height:12px;border-radius:50%;background:var(--accent);transform:translate(-50%,-50%);box-shadow:0 0 0 4px var(--bg),0 0 0 5px var(--border);z-index:1}
.tl-content{display:block;width:calc(50% - 34px);padding:16px;border:1px solid var(--border);background:var(--card);border-radius:12px;transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease}
.tl-content:hover{transform:translateY(-3px);border-color:var(--border-h);box-shadow:0 10px 28px rgba(0,0,0,.35)}
.tl-content h3{margin-top:0;color:var(--text)}
.tl-more{display:inline-flex;align-items:center;gap:5px;margin-top:8px;font-size:12px;font-weight:700;color:var(--accent)}
.tl-item.seo-fu-js:nth-child(odd){transform:translateX(-30px)}
.tl-item.seo-fu-js:nth-child(even){transform:translateX(30px)}
@media (max-width:680px){
  .timeline::before{left:5px}
  .tl-item,.tl-item:nth-child(odd),.tl-item:nth-child(even){justify-content:flex-start;padding-left:26px}
  .tl-dot{left:5px}
  .tl-content{width:100%}
  .tl-item.seo-fu-js:nth-child(odd),.tl-item.seo-fu-js:nth-child(even){transform:translateY(16px)}
}
.cta{display:inline-block;background:var(--accent);color:var(--accent-ink);padding:11px 18px;border-radius:8px;text-decoration:none;font-weight:600;transition:transform .15s ease,box-shadow .15s ease}
.cta:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(var(--terracotta),.3)}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:14px}.breadcrumb a{color:var(--muted)}
footer{position:relative;z-index:2;margin-top:50px;border-top:1px solid var(--border);padding:24px 0;color:var(--muted)}

/* ── blog / long-form articles ─────────────────────────── */
.article-meta{font-size:13px;color:var(--muted);margin:0 0 4px}
.card .meta{font-size:12px;color:var(--muted);margin:0 0 6px}
.article-body h2{font-family:var(--display);font-size:22px;margin:34px 0 12px;line-height:1.3;color:var(--text)}
.article-body h3{font-family:var(--display);font-size:17px;margin:24px 0 8px;color:var(--text)}
.article-body p{margin:0 0 16px}
.article-body ul,.article-body ol{margin:0 0 16px;padding-left:20px}
.article-body li{margin-bottom:6px}
.callout{background:var(--card);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:10px;padding:16px 18px;margin:22px 0}
.callout strong{color:var(--text)}
.faq dt{font-weight:600;color:var(--text);margin:18px 0 6px}
.faq dd{margin:0 0 0 0;color:var(--muted)}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.tag-row span{font-size:11px;padding:4px 9px;border:1px solid var(--border);border-radius:100px;color:var(--muted)}

/* ── author box ─────────────────────────────────────────── */
.author-box{display:flex;gap:14px;align-items:flex-start;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:18px 20px;margin:30px 0}
.author-box img{width:52px;height:52px;border-radius:50%;flex-shrink:0;object-fit:cover;background:var(--bg);padding:6px}
.author-name{font-family:var(--display);font-weight:700;margin-bottom:4px;color:var(--text)}
.author-bio{font-size:13px;color:var(--muted);margin:0;line-height:1.65}
.author-bio a{color:var(--accent)}

/* ── blog index / cluster styling ──────────────────────── */
.cluster-nav{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 6px}
.cluster-nav a{font-size:12px;padding:6px 12px;border:1px solid var(--border);border-radius:100px;color:var(--muted)}
.cluster-nav a:hover{color:var(--text);border-color:var(--accent)}
.cluster-heading{font-family:var(--display);font-size:15px;font-weight:700;color:var(--accent);margin:36px 0 4px;text-transform:uppercase;letter-spacing:.04em}
.cluster-sub{font-size:13px;color:var(--muted);margin:0 0 14px}
.card .cat{display:inline-block;font-size:10px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);margin-bottom:8px}

/* ── rhythm, motion & scroll-reveal parity with the rest of the site ── */
main{padding:clamp(48px,8vw,88px) 0}
section{margin-top:clamp(48px,8vw,96px)}
.article-body{font-size:16px;line-height:1.75}
.article-body h2{margin-top:clamp(34px,6vw,52px)}

.seo-fu-js{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}
.seo-fu-js.on{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  .seo-fu-js{opacity:1 !important;transform:none !important;transition:none !important}
}