/*
Theme Name: BigSERPEnergy
Theme URI: https://bigserpenergy.com/
Author: BigSERPEnergy
Author URI: https://bigserpenergy.com/
Description: Self-contained editorial theme for BigSERPEnergy.com, a practitioner-first publication on enterprise and large-scale SEO. Bold technical masthead, data-forward article layout, volt accent.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.6
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: bigserpenergy
*/

/* ============================================================
   Design tokens
   ============================================================ */
:root{
  --ink:#13151c;
  --ink-soft:#41475a;
  --ink-faint:#6c7488;
  --paper:#f4f3ee;
  --paper-card:#ffffff;
  --line:#e3e1d8;
  --line-strong:#cfccc0;
  --volt:#c7f23d;
  --volt-deep:#9bd109;
  --blue:#2440e6;
  --blue-deep:#1a2fae;
  --maxw:1180px;
  --readw:720px;
  --radius:14px;
  --shadow:0 1px 0 var(--line), 0 18px 40px -28px rgba(19,21,28,.5);
  --font-display:"Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono:"SFMono-Regular", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:18px;
  line-height:1.7;
  font-feature-settings:"kern","liga","cv11";
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.1;letter-spacing:-.02em;color:var(--ink)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* skip link */
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:16px;top:12px;background:var(--ink);color:#fff;padding:8px 14px;border-radius:8px;z-index:200}

/* ============================================================
   Masthead
   ============================================================ */
.site-top{background:var(--ink);color:#fff;border-bottom:3px solid var(--volt)}
.site-top .wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--font-display);font-weight:700;color:#fff;font-size:19px;letter-spacing:-.01em;text-decoration:none}
.brand:hover{text-decoration:none}
.brand .mark{display:inline-grid;place-items:center;width:34px;height:34px;background:var(--volt);color:var(--ink);border-radius:9px;font-weight:700;font-size:17px;transform:rotate(-4deg)}
.brand .mark span{transform:rotate(4deg)}
.brand b{color:var(--volt)}
.main-nav ul{list-style:none;display:flex;gap:26px;margin:0;padding:0}
.main-nav a{color:#d7dae2;font-size:15px;font-weight:500;letter-spacing:.01em}
.main-nav a:hover{color:#fff;text-decoration:none}
.main-nav .current-menu-item>a,.main-nav .current_page_item>a{color:var(--volt)}
.nav-toggle{display:none;background:none;border:1px solid #3a3f4d;color:#fff;border-radius:8px;padding:8px 12px;font-size:14px;cursor:pointer}

/* ============================================================
   Hero (front page)
   ============================================================ */
.hero{background:var(--ink);color:#fff;padding:84px 0 92px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;background:radial-gradient(circle,var(--volt) 0%,transparent 62%);opacity:.16}
.hero .wrap{position:relative;z-index:1;max-width:960px}
.hero .eyebrow{font-family:var(--font-mono);font-size:13px;letter-spacing:.18em;text-transform:uppercase;color:var(--volt);margin-bottom:22px}
.hero h1{color:#fff;font-size:clamp(40px,7vw,76px);line-height:1.02;margin:0 0 22px}
.hero h1 mark{background:none;color:var(--volt)}
.hero p{font-size:clamp(18px,2.4vw,22px);color:#c3c7d2;max-width:660px;margin:0 0 34px;line-height:1.55}
.btn{display:inline-flex;align-items:center;gap:9px;background:var(--volt);color:var(--ink);font-family:var(--font-display);font-weight:700;font-size:16px;padding:14px 24px;border-radius:11px;text-decoration:none;transition:transform .12s ease}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn.ghost{background:transparent;color:#fff;box-shadow:inset 0 0 0 1.5px #3a4150}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ============================================================
   Section heads
   ============================================================ */
.section{padding:64px 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin-bottom:34px;border-bottom:2px solid var(--ink);padding-bottom:14px}
.section-head h2{font-size:clamp(26px,4vw,38px);margin:0}
.section-head .kicker{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-faint)}
.section-head a{font-size:15px;font-weight:600;white-space:nowrap}

/* ============================================================
   Topics grid
   ============================================================ */
.topics{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.topic{display:block;background:var(--paper-card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;text-decoration:none;color:var(--ink);transition:border-color .15s ease,transform .15s ease}
.topic:hover{text-decoration:none;border-color:var(--ink);transform:translateY(-3px)}
.topic .num{font-family:var(--font-mono);font-size:13px;color:var(--volt-deep);font-weight:600}
.topic h3{font-size:21px;margin:10px 0 8px}
.topic p{margin:0;font-size:15.5px;color:var(--ink-soft);line-height:1.55}

/* ============================================================
   Article list
   ============================================================ */
.post-list{display:grid;gap:6px}
.post-row{display:grid;grid-template-columns:128px 1fr auto;gap:26px;align-items:center;padding:24px 0;border-bottom:1px solid var(--line)}
.post-row:first-child{border-top:1px solid var(--line)}
.post-row .thumb{width:128px;height:84px;border-radius:10px;overflow:hidden;background:var(--ink)}
.post-row .thumb img{width:100%;height:100%;object-fit:cover}
.post-row .cat{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--volt-deep);font-weight:600;margin-bottom:6px;display:inline-block}
.post-row h3{font-size:23px;margin:0 0 6px;line-height:1.15}
.post-row h3 a{color:var(--ink)}
.post-row h3 a:hover{color:var(--blue);text-decoration:none}
.post-row .excerpt{margin:0;color:var(--ink-soft);font-size:15.5px;max-width:62ch}
.post-row .meta{font-family:var(--font-mono);font-size:12.5px;color:var(--ink-faint);white-space:nowrap;text-align:right}

/* featured lead card */
.lead-card{display:grid;grid-template-columns:1.1fr 1fr;gap:0;background:var(--paper-card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-bottom:34px}
.lead-card .lead-media{background:var(--ink);min-height:300px}
.lead-card .lead-media img{width:100%;height:100%;object-fit:cover}
.lead-card .lead-body{padding:38px 36px;display:flex;flex-direction:column;justify-content:center}
.lead-card .cat{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--volt-deep);font-weight:600}
.lead-card h2{font-size:clamp(26px,3.4vw,36px);margin:12px 0 14px;line-height:1.08}
.lead-card h2 a{color:var(--ink)}
.lead-card p{margin:0 0 18px;color:var(--ink-soft);font-size:16.5px}
.lead-card .meta{font-family:var(--font-mono);font-size:12.5px;color:var(--ink-faint)}

/* ============================================================
   Single / page content
   ============================================================ */
.article-head{padding:54px 0 0}
.article-head .wrap{max-width:var(--readw)}
.crumb{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--volt-deep);font-weight:600;margin-bottom:18px}
.article-head h1{font-size:clamp(32px,5vw,52px);margin:0 0 18px}
.article-dek{font-size:21px;color:var(--ink-soft);line-height:1.5;margin:0 0 26px}
.byline{display:flex;align-items:center;gap:14px;font-family:var(--font-mono);font-size:13px;color:var(--ink-faint);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0}
.byline .author{color:var(--ink);font-weight:600}
.article-hero{margin:32px 0 8px}
.article-hero figure{margin:0}
.article-hero img{width:100%;border-radius:var(--radius)}
.article-hero figcaption{font-family:var(--font-mono);font-size:12px;color:var(--ink-faint);margin-top:8px}

.entry{margin:0 auto;max-width:var(--readw)}
.entry>*{margin-left:auto;margin-right:auto}
.entry p,.entry ul,.entry ol,.entry h2,.entry h3,.entry h4,.entry blockquote,.entry figure,.entry .callout,.entry table,.entry pre{max-width:var(--readw)}
.entry p{margin:0 0 22px}
.entry h2{font-size:30px;margin:46px 0 14px;padding-top:10px}
.entry h3{font-size:23px;margin:34px 0 10px}
.entry h4{font-size:19px;margin:26px 0 8px;font-family:var(--font-body);font-weight:700}
.entry a{text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:2px}
.entry ul,.entry ol{padding-left:24px;margin:0 0 22px}
.entry li{margin:0 0 8px}
.entry ul li::marker{color:var(--volt-deep)}
.entry blockquote{margin:30px 0;padding:6px 0 6px 26px;border-left:4px solid var(--volt);font-size:21px;font-family:var(--font-display);font-weight:500;line-height:1.4;color:var(--ink)}
.entry img{border-radius:12px}
.entry figure{margin:30px 0}
.entry figcaption{font-family:var(--font-mono);font-size:12px;color:var(--ink-faint);margin-top:8px;text-align:left}
.entry code{font-family:var(--font-mono);font-size:.86em;background:#eceae2;padding:2px 6px;border-radius:5px}
.entry pre{background:var(--ink);color:#eef0f5;padding:20px 22px;border-radius:12px;overflow:auto;font-family:var(--font-mono);font-size:14px;line-height:1.6}
.entry pre code{background:none;padding:0;color:inherit}
.entry table{width:100%;border-collapse:collapse;margin:28px 0;font-size:15.5px}
.entry th,.entry td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line)}
.entry th{font-family:var(--font-display);background:#eceae2}

/* callouts / takeaways */
.callout{background:var(--paper-card);border:1px solid var(--line);border-left:4px solid var(--volt);border-radius:10px;padding:22px 24px;margin:30px auto}
.callout .label{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--volt-deep);font-weight:600;margin-bottom:8px}
.callout p:last-child,.callout ul:last-child{margin-bottom:0}
.callout.dark{background:var(--ink);border-color:var(--ink);color:#e8eaf0}
.callout.dark .label{color:var(--volt)}
.callout.dark a{color:var(--volt)}

.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:32px auto}
.stat{background:var(--ink);color:#fff;border-radius:12px;padding:22px}
.stat .n{font-family:var(--font-display);font-size:34px;font-weight:700;color:var(--volt);line-height:1}
.stat .l{font-size:13.5px;color:#c3c7d2;margin-top:8px}

/* ============================================================
   Topics / category archive header
   ============================================================ */
.page-hero{background:var(--ink);color:#fff;padding:60px 0 64px}
.page-hero .wrap{max-width:var(--readw)}
.page-hero .eyebrow{font-family:var(--font-mono);font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--volt);margin-bottom:16px}
.page-hero h1{color:#fff;font-size:clamp(32px,5vw,52px);margin:0 0 14px}
.page-hero p{color:#c3c7d2;font-size:19px;max-width:600px;margin:0}

/* ============================================================
   Newsletter CTA
   ============================================================ */
.cta-band{background:var(--volt);color:var(--ink);border-radius:18px;padding:46px 44px;margin:54px auto;max-width:var(--maxw);display:grid;grid-template-columns:1.2fr 1fr;gap:30px;align-items:center}
.cta-band h2{font-size:clamp(26px,3.6vw,36px);margin:0 0 10px}
.cta-band p{margin:0;font-size:16.5px;color:#1d2410}
.cta-band .form{display:flex;gap:10px;flex-wrap:wrap}
.cta-band input[type=email]{flex:1;min-width:200px;border:2px solid var(--ink);border-radius:11px;padding:13px 16px;font-size:16px;font-family:var(--font-body);background:#fff}
.cta-band button{background:var(--ink);color:#fff;border:none;border-radius:11px;padding:13px 22px;font-family:var(--font-display);font-weight:700;font-size:16px;cursor:pointer}

/* ============================================================
   Footer
   ============================================================ */
.site-foot{background:var(--ink);color:#aeb4c2;margin-top:70px;padding:60px 0 34px}
.site-foot .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:36px;padding-bottom:40px;border-bottom:1px solid #2a2f3c}
.site-foot .brand{color:#fff;margin-bottom:14px}
.site-foot p{font-size:15px;line-height:1.6;max-width:42ch;margin:0}
.site-foot h4{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:#7c8398;margin:0 0 14px;font-weight:600}
.site-foot ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.site-foot a{color:#cfd4df;font-size:15px}
.site-foot a:hover{color:var(--volt);text-decoration:none}
.foot-base{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;font-size:13.5px;color:#7c8398;font-family:var(--font-mono)}

/* pagination */
.pagination{display:flex;gap:8px;justify-content:center;margin:50px 0;flex-wrap:wrap}
.pagination .page-numbers{font-family:var(--font-mono);font-size:14px;padding:9px 14px;border:1px solid var(--line-strong);border-radius:9px;color:var(--ink)}
.pagination .current{background:var(--ink);color:#fff;border-color:var(--ink)}
.pagination a:hover{border-color:var(--ink);text-decoration:none}

/* comments minimal */
.comments-area{max-width:var(--readw);margin:50px auto 0}

/* ============================================================
   Responsive
   ============================================================ */
@media(max-width:880px){
  .topics{grid-template-columns:1fr 1fr}
  .lead-card{grid-template-columns:1fr}
  .lead-card .lead-media{min-height:220px}
  .cta-band{grid-template-columns:1fr}
  .stat-row{grid-template-columns:1fr 1fr}
  .site-foot .cols{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  body{font-size:17px}
  .main-nav{display:none;position:absolute;top:72px;left:0;right:0;background:var(--ink);border-bottom:3px solid var(--volt);padding:12px 0}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;gap:0;padding:0 24px}
  .main-nav li{padding:11px 0;border-bottom:1px solid #2a2f3c}
  .nav-toggle{display:inline-block}
  .post-row{grid-template-columns:1fr;gap:8px}
  .post-row .thumb{display:none}
  .post-row .meta{text-align:left}
  .topics{grid-template-columns:1fr}
  .stat-row{grid-template-columns:1fr}
  .site-foot .cols{grid-template-columns:1fr}
  .hero{padding:60px 0 64px}
  .cta-band{padding:32px 26px;margin:40px auto}
}