:root{
  --navy:#0b1d3a;
  --navy-2:#0f2547;
  --navy-3:#1f3258;
  --amber:#f5a524;
  --amber-2:#e09112;
  --amber-soft:#fdecc8;
  --cream:#fdfaf3;
  --cream-2:#f5efe2;
  --paper:#ffffff;
  --ink:#0b1d3a;
  --muted:#5b6477;
  --line:#e7e1d2;
  --line-strong:#d6cdb6;
  --good:#1f7a5a;
  --shadow-sm:0 1px 2px rgba(11,29,58,.06),0 2px 6px rgba(11,29,58,.04);
  --shadow:0 2px 4px rgba(11,29,58,.06),0 12px 32px rgba(11,29,58,.08);
  --shadow-lg:0 6px 12px rgba(11,29,58,.08),0 24px 60px rgba(11,29,58,.12);
  --radius:16px;
  --radius-sm:10px;
  --maxw:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0;background:var(--cream);color:var(--ink);font-family:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;display:block}
a{color:var(--navy);text-decoration:none;font-weight:500}
a:hover{color:var(--amber-2);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
@media (max-width:680px){.container{padding:0 18px}}

/* ============ Utility Bar ============ */
.utility-bar{background:var(--navy);color:#cfd6e4;font-size:13px}
.utility-bar .row{display:flex;align-items:center;justify-content:space-between;height:36px;gap:18px;flex-wrap:wrap}
.utility-bar a{color:#cfd6e4;font-weight:500}
.utility-bar a:hover{color:var(--amber);text-decoration:none}
.utility-bar .pill{display:inline-flex;align-items:center;gap:6px;background:rgba(245,165,36,.12);color:var(--amber);padding:3px 10px;border-radius:999px;font-weight:600;font-size:12px;letter-spacing:.02em}
.utility-bar .links{display:flex;gap:18px}
@media (max-width:680px){.utility-bar .links{display:none}}

/* ============ Header ============ */
.site-header{position:sticky;top:0;z-index:30;background:var(--cream);border-bottom:1px solid var(--line)}
.site-header .row{display:flex;align-items:center;gap:24px;height:74px}
.brand{display:flex;align-items:center;gap:12px;font-family:"Fraunces",Georgia,serif;font-weight:700;color:var(--navy);font-size:22px;letter-spacing:-.01em}
.brand .logo{width:38px;height:38px;border-radius:11px;background:var(--navy);color:var(--amber);display:inline-flex;align-items:center;justify-content:center;font-family:"Fraunces",serif;font-weight:700;font-size:17px;box-shadow:inset 0 -3px 0 var(--amber)}
.brand .ai{color:var(--amber);font-weight:700}
.search{flex:1;max-width:480px;margin-left:auto}
.search form{display:flex;align-items:center;background:var(--paper);border:1.5px solid var(--line-strong);border-radius:999px;padding:5px;transition:border-color .15s,box-shadow .15s}
.search form:focus-within{border-color:var(--navy);box-shadow:0 0 0 4px rgba(11,29,58,.06)}
.search input{flex:1;border:0;outline:0;padding:9px 16px;font-size:15px;background:transparent;color:var(--ink);font-family:inherit}
.search button{border:0;background:var(--navy);color:#fff;padding:9px 20px;border-radius:999px;font-weight:600;cursor:pointer;font-size:14px;font-family:inherit}
.search button:hover{background:var(--amber-2);color:var(--navy)}
.nav{display:flex;align-items:center;gap:6px}
.nav a{color:var(--ink);padding:9px 14px;border-radius:999px;font-size:14.5px;font-weight:600}
.nav a:hover{background:var(--amber-soft);color:var(--navy);text-decoration:none}
.nav a.active{background:var(--navy);color:#fff}
.menu-toggle{display:none;background:none;border:0;font-size:22px;cursor:pointer;color:var(--navy);padding:8px}
@media (max-width:980px){
  .search{max-width:none;order:5;flex-basis:100%;margin:0}
  .site-header .row{flex-wrap:wrap;height:auto;padding:14px 0}
  .nav{order:4;flex-wrap:wrap;justify-content:center;width:100%}
  .nav a{padding:8px 12px;font-size:13.5px}
}
@media (max-width:540px){
  .nav a{flex:1;text-align:center;min-width:auto}
}

/* ============ Hero ============ */
.hero{background:linear-gradient(180deg,var(--cream-2) 0%,var(--cream) 100%);padding:72px 0 88px;border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-120px;right:-120px;width:400px;height:400px;background:radial-gradient(circle,rgba(245,165,36,.15) 0%,transparent 70%);border-radius:50%}
.hero::after{content:"";position:absolute;bottom:-180px;left:-100px;width:380px;height:380px;background:radial-gradient(circle,rgba(11,29,58,.06) 0%,transparent 70%);border-radius:50%}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:center}
@media (max-width:980px){.hero-grid{grid-template-columns:1fr;gap:40px}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--paper);color:var(--navy);padding:7px 14px;border-radius:999px;font-size:12.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;border:1px solid var(--line-strong);box-shadow:var(--shadow-sm)}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--amber);box-shadow:0 0 0 4px rgba(245,165,36,.18)}
h1{font-family:"Fraunces",Georgia,serif;font-weight:600;font-size:62px;line-height:1.05;letter-spacing:-.025em;margin:18px 0 22px;color:var(--navy)}
h1 .underline{position:relative;white-space:nowrap;color:var(--navy)}
h1 .underline::after{content:"";position:absolute;left:-2px;right:-2px;bottom:6px;height:14px;background:var(--amber);opacity:.45;z-index:-1;border-radius:4px;transform:skewY(-1deg)}
@media (max-width:880px){h1{font-size:46px}}
@media (max-width:540px){h1{font-size:36px;line-height:1.1}}
h2{font-family:"Fraunces",Georgia,serif;font-weight:600;font-size:36px;letter-spacing:-.015em;margin:0 0 14px;color:var(--navy);line-height:1.15}
@media (max-width:680px){h2{font-size:28px}}
h3{font-family:"Fraunces",Georgia,serif;font-weight:600;font-size:20px;margin:0 0 6px;letter-spacing:-.01em;color:var(--navy)}
.lead{color:var(--muted);font-size:19px;line-height:1.55;margin:0 0 30px;max-width:580px}
@media (max-width:680px){.lead{font-size:17px}}
.hero-ctas{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:34px}
.cta{display:inline-flex;align-items:center;gap:8px;background:var(--navy);color:#fff;padding:14px 26px;border-radius:999px;font-weight:600;font-size:15px;border:2px solid var(--navy);transition:transform .12s,background .15s}
.cta:hover{background:#000;color:#fff;text-decoration:none;transform:translateY(-1px)}
.cta.amber{background:var(--amber);color:var(--navy);border-color:var(--amber)}
.cta.amber:hover{background:var(--amber-2);color:var(--navy);border-color:var(--amber-2)}
.cta.alt{background:transparent;color:var(--navy);border-color:var(--navy)}
.cta.alt:hover{background:var(--navy);color:#fff}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;border-top:1px solid var(--line-strong);padding-top:24px;max-width:560px}
.hero-stats .stat strong{display:block;font-family:"Fraunces",serif;font-size:30px;color:var(--navy);font-weight:700;line-height:1}
.hero-stats .stat span{display:block;font-size:12.5px;color:var(--muted);margin-top:6px;font-weight:500}
@media (max-width:540px){.hero-stats{grid-template-columns:repeat(2,1fr);gap:14px}.hero-stats .stat strong{font-size:24px}}

/* Hero visual */
.hero-visual{position:relative;min-height:380px}
.card-stack{position:relative;height:100%}
.v-card{position:absolute;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow);max-width:340px}
.v-card .v-eyebrow{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--amber-2);margin-bottom:8px}
.v-card .v-title{font-family:"Fraunces",serif;font-weight:600;font-size:18px;color:var(--navy);margin-bottom:8px;line-height:1.25}
.v-card .v-body{font-size:14px;color:var(--muted);margin:0;line-height:1.55}
.v-card.c1{top:0;right:30px;transform:rotate(-3deg);z-index:3}
.v-card.c2{top:130px;left:0;transform:rotate(2deg);z-index:2;background:var(--navy);color:#fff;border-color:var(--navy-3)}
.v-card.c2 .v-eyebrow{color:var(--amber)}
.v-card.c2 .v-title{color:#fff}
.v-card.c2 .v-body{color:#bcc5d6}
.v-card.c3{top:260px;right:10px;transform:rotate(-1deg);z-index:1}
@media (max-width:980px){.hero-visual{min-height:340px;max-width:380px;margin:0 auto}}
@media (max-width:540px){.v-card{max-width:300px;padding:18px 20px}.v-card.c1{right:0}}

/* ============ Section ============ */
.section{padding:64px 0}
@media (max-width:680px){.section{padding:48px 0}}
.section.cream{background:var(--cream-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section.dark{background:var(--navy);color:#fff}
.section.dark h2{color:#fff}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:12px;margin-bottom:32px;padding-bottom:18px;border-bottom:2px solid var(--ink)}
.section.dark .section-head{border-bottom-color:var(--amber)}
.section-head .more{font-size:14px;font-weight:700;color:var(--navy);background:var(--amber);padding:9px 18px;border-radius:999px;letter-spacing:.01em}
.section-head .more:hover{background:var(--amber-2);text-decoration:none;color:var(--navy)}

/* ============ Subjects / Cards ============ */
.subjects{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
.subject-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:transform .15s,box-shadow .15s,border-color .15s;display:block;color:var(--ink)}
.subject-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--amber);text-decoration:none}
.subject-card .icon{width:46px;height:46px;border-radius:12px;background:var(--navy);color:var(--amber);display:flex;align-items:center;justify-content:center;font-family:"Fraunces",serif;font-weight:700;font-size:16px;letter-spacing:.02em;margin-bottom:14px}
.subject-card h3{margin:0 0 6px;font-size:18px}
.subject-card .summary{margin:6px 0 12px;color:var(--muted);font-size:14px;line-height:1.55}
.subject-card .count{display:inline-block;background:var(--cream-2);color:var(--navy);font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;letter-spacing:.03em;text-transform:uppercase}

/* ============ Q&A grid ============ */
.qa-grid{display:grid;grid-template-columns:1fr 340px;gap:36px}
@media (max-width:980px){.qa-grid{grid-template-columns:1fr;gap:28px}}
.q-list{display:flex;flex-direction:column;gap:14px}
.q-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;display:block;color:var(--ink);transition:border-color .15s,box-shadow .15s,transform .12s}
.q-card:hover{border-color:var(--amber);box-shadow:var(--shadow-sm);text-decoration:none;transform:translateX(2px)}
.q-card .meta{color:var(--muted);font-size:11.5px;margin-bottom:8px;text-transform:uppercase;letter-spacing:.08em;font-weight:700}
.q-card .meta .sep{margin:0 6px;color:var(--amber)}
.q-card .title{font-family:"Fraunces",serif;font-weight:600;font-size:18.5px;line-height:1.3;margin-bottom:8px;color:var(--navy)}
.q-card .preview{color:var(--muted);font-size:14.5px;line-height:1.55}

/* ============ Sidebar ============ */
.sidebar{display:flex;flex-direction:column;gap:18px}
.box{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.box h3{font-family:"Fraunces",serif;font-weight:600;font-size:16px;text-transform:none;letter-spacing:0;color:var(--navy);margin:0 0 14px;padding-bottom:10px;border-bottom:2px solid var(--amber)}
.box ul{list-style:none;margin:0;padding:0}
.box li{padding:9px 0;border-bottom:1px solid var(--line);font-size:14.5px;line-height:1.4}
.box li:last-child{border:0}
.box li a{color:var(--navy);font-weight:500}
.box li a:hover{color:var(--amber-2)}
.box.navy{background:var(--navy);color:#fff;border-color:var(--navy-3)}
.box.navy h3{color:#fff;border-bottom-color:var(--amber)}

/* ============ PBN editorial recommendation widget ============ */
.editorial-rec{background:linear-gradient(180deg,#fffaf0 0%,var(--paper) 100%);border:1.5px solid var(--amber);border-radius:var(--radius);padding:24px;position:relative}
.editorial-rec::before{content:"EDITOR'S PICKS";position:absolute;top:-10px;left:20px;background:var(--amber);color:var(--navy);font-size:10.5px;font-weight:800;letter-spacing:.15em;padding:3px 12px;border-radius:999px}
.editorial-rec h3{font-family:"Fraunces",serif;font-weight:700;font-size:18px;color:var(--navy);margin:6px 0 4px;border:0;padding:0}
.editorial-rec .intro{font-size:13px;color:var(--muted);margin:0 0 14px;line-height:1.5}
.editorial-rec ul{list-style:none;margin:0;padding:0}
.editorial-rec li{display:flex;align-items:flex-start;gap:10px;padding:11px 0;border-bottom:1px dashed var(--line-strong);font-size:14px}
.editorial-rec li:last-child{border:0;padding-bottom:0}
.editorial-rec li .marker{color:var(--amber-2);font-weight:700;flex-shrink:0;margin-top:2px}
.editorial-rec li .text{flex:1}
.editorial-rec li a{color:var(--navy);font-weight:600;display:block;margin-bottom:2px}
.editorial-rec li a:hover{color:var(--amber-2)}
.editorial-rec li .desc{display:block;color:var(--muted);font-size:12.5px;line-height:1.45;font-weight:400}

/* Inline PBN link block */
.inline-rec{margin:24px 0;padding:18px 22px;background:var(--cream-2);border-left:4px solid var(--amber);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:15px;line-height:1.6;color:var(--navy)}
.inline-rec .label{display:inline-block;background:var(--navy);color:var(--amber);font-size:10.5px;font-weight:700;letter-spacing:.12em;padding:3px 10px;border-radius:999px;text-transform:uppercase;margin-right:10px;vertical-align:middle}
.inline-rec a{color:var(--navy);font-weight:600;border-bottom:2px solid var(--amber)}
.inline-rec a:hover{color:var(--amber-2);text-decoration:none}

/* ============ AdSense placeholder ============ */
.adsense{background:repeating-linear-gradient(135deg,#f6efde 0 8px,#fbf6e6 8px 16px);border:1px dashed var(--line-strong);color:#9b9078;font-size:11px;text-align:center;padding:20px;border-radius:var(--radius-sm);margin:20px 0;letter-spacing:.08em;text-transform:uppercase;font-weight:600}

/* ============ Breadcrumbs ============ */
.breadcrumb{font-size:13px;color:var(--muted);margin:24px 0 4px;padding:14px 0 0}
.breadcrumb a{color:var(--muted);font-weight:500}
.breadcrumb a:hover{color:var(--navy)}
.breadcrumb .sep{margin:0 8px;color:var(--amber);opacity:.7}

/* ============ Article (concept/case/hub) page ============ */
.article-hero{background:var(--navy);color:#fff;padding:48px 0 64px;border-bottom:6px solid var(--amber)}
.article-hero h1{color:#fff;font-size:48px;margin:14px 0 16px}
.article-hero .lead{color:#bcc5d6;max-width:740px;font-size:19px}
.article-hero .eyebrow{background:rgba(245,165,36,.15);color:var(--amber);border-color:rgba(245,165,36,.3)}
.article-hero .breadcrumb{color:#8895ad;padding:0;margin:0 0 8px}
.article-hero .breadcrumb a{color:#bcc5d6}
.article-hero .breadcrumb .sep{color:var(--amber)}
.article-hero .meta-pills{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
.article-hero .meta-pills span{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);color:#cfd6e4;font-size:12.5px;padding:5px 12px;border-radius:999px;font-weight:500}
@media (max-width:680px){.article-hero h1{font-size:34px}}

.article-grid{display:grid;grid-template-columns:1fr 320px;gap:48px;padding:48px 0}
@media (max-width:980px){.article-grid{grid-template-columns:1fr;gap:32px;padding:36px 0}}
.article-body{font-size:17px;line-height:1.75;color:#1f2a3d}
.article-body > p:first-of-type::first-letter{font-family:"Fraunces",serif;font-size:54px;font-weight:700;float:left;line-height:.9;margin:6px 12px 0 0;color:var(--navy)}
.article-body h2{font-size:28px;margin:34px 0 12px;padding-top:18px;border-top:1px solid var(--line)}
.article-body h2:first-of-type{border-top:0;padding-top:0;margin-top:0}
.article-body h3{font-size:21px;margin:26px 0 10px}
.article-body p{margin:0 0 16px}
.article-body ul,.article-body ol{padding-left:24px;margin:0 0 18px}
.article-body li{margin:8px 0}
.article-body strong{color:var(--navy)}
.article-body blockquote{margin:22px 0;padding:18px 24px;background:var(--cream-2);border-left:4px solid var(--navy);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-family:"Fraunces",serif;font-size:18px;color:var(--navy);font-style:italic}
.article-body .callout{background:var(--cream-2);border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;margin:24px 0}
.article-body .callout .callout-label{display:inline-block;background:var(--navy);color:var(--amber);font-size:10.5px;font-weight:800;letter-spacing:.12em;padding:3px 10px;border-radius:999px;text-transform:uppercase;margin-bottom:10px}
.article-body .callout h4{font-family:"Fraunces",serif;font-size:18px;margin:0 0 8px;color:var(--navy)}
.article-body .callout.tip{background:#f0f7ed;border-color:#cfe2c5}
.article-body .callout.tip .callout-label{background:var(--good);color:#fff}
.article-body .callout.warning{background:#fdf2e0;border-color:#f5cf8c}
.article-body .callout.warning .callout-label{background:var(--amber-2);color:#fff}

/* Concept "what it is / why / how" stripe */
.kv-stripe{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:6px 0 28px}
@media (max-width:780px){.kv-stripe{grid-template-columns:1fr}}
.kv-stripe .kv{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}
.kv-stripe .kv .label{font-size:10.5px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--amber-2);margin-bottom:6px}
.kv-stripe .kv .val{font-size:15px;color:var(--navy);font-weight:500;line-height:1.55}

/* Crosslinks */
.crosslinks{margin-top:36px;padding-top:28px;border-top:2px solid var(--amber)}
.crosslinks h3{font-family:"Fraunces",serif;font-size:22px;margin:0 0 14px;color:var(--navy);border:0;padding:0}
.crosslinks-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.crosslinks-grid a{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px;display:block;color:var(--navy);transition:border-color .15s,transform .12s}
.crosslinks-grid a:hover{border-color:var(--amber);text-decoration:none;transform:translateX(2px)}
.crosslinks-grid a .ck-eyebrow{font-size:10.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--amber-2);margin-bottom:4px;display:block}
.crosslinks-grid a .ck-title{font-family:"Fraunces",serif;font-weight:600;font-size:15.5px;line-height:1.3}

/* TOC */
.toc{position:sticky;top:96px}
.toc h4{font-size:11.5px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--amber-2);margin:0 0 12px}
.toc ul{list-style:none;padding:0;margin:0;border-left:2px solid var(--line)}
.toc li{padding:0}
.toc a{display:block;padding:8px 14px;color:var(--muted);font-size:14px;border-left:2px solid transparent;margin-left:-2px;font-weight:500}
.toc a:hover{color:var(--navy);border-left-color:var(--amber);text-decoration:none}

/* Tags */
.tags{display:flex;flex-wrap:wrap;gap:6px;margin:24px 0 0}
.tag{background:var(--cream-2);color:var(--navy);padding:5px 12px;border-radius:999px;font-size:12px;font-weight:600;border:1px solid var(--line)}

/* ============ Hub pillars (dark section) ============ */
.hub-pillars{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.hub-pillar{padding:22px 24px;background:var(--cream);border:1px solid var(--line);border-left:5px solid var(--amber);border-radius:var(--radius)}
.hub-pillar h3{margin:0 0 8px;font-size:18px}
.hub-pillar p{font-size:14.5px;color:var(--muted);margin:0 0 12px;line-height:1.55}
.hub-pillar .read{font-weight:700;color:var(--navy);font-size:14px}

/* ============ Q-page (deprecated styles refreshed) ============ */
.q-page{display:grid;grid-template-columns:1fr 320px;gap:36px;margin:24px 0 56px}
@media (max-width:980px){.q-page{grid-template-columns:1fr}}
.q-body .question-block{background:linear-gradient(135deg,var(--amber-soft),#fff7e0);border:1px solid var(--amber);border-radius:var(--radius);padding:22px 26px;margin:14px 0 24px}
.q-body .question-block .label{font-size:11px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--amber-2)}
.q-body .question-block p{margin:8px 0 0;font-size:19px;font-family:"Fraunces",Georgia,serif;line-height:1.4;color:var(--navy)}
.q-body .answer-block{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:28px 32px}
.q-body .answer-block .label{font-size:11px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--amber-2);margin-bottom:14px}
.q-body h2{font-family:"Fraunces",serif;font-weight:600;font-size:24px;margin:24px 0 8px;color:var(--navy)}
.q-body h3{font-family:"Fraunces",serif;font-weight:600;font-size:18px;margin:20px 0 6px;color:var(--navy)}
.q-body p{margin:10px 0;line-height:1.7}
.q-body ul,.q-body ol{padding-left:24px}
.q-body li{margin:6px 0}
.related{margin-top:32px;border-top:2px solid var(--amber);padding-top:24px}
.related h3{font-family:"Fraunces",serif;font-size:20px;color:var(--navy);margin:0 0 14px;border:0;padding:0}

/* ============ Footer ============ */
.footer{background:var(--navy);color:#cfd6e4;padding:64px 0 32px;margin-top:80px;position:relative}
.footer::before{content:"";position:absolute;top:0;left:0;right:0;height:5px;background:linear-gradient(90deg,var(--amber),var(--amber-2),var(--amber))}
.footer a{color:#fff;font-weight:500}
.footer a:hover{color:var(--amber);text-decoration:none}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}
@media (max-width:880px){.footer .cols{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:540px){.footer .cols{grid-template-columns:1fr}}
.footer h4{font-family:"Fraunces",serif;font-weight:600;font-size:15px;letter-spacing:0;color:#fff;margin:0 0 16px;text-transform:none;padding-bottom:8px;border-bottom:2px solid var(--amber);display:inline-block}
.footer ul{list-style:none;padding:0;margin:0}
.footer li{padding:6px 0;font-size:14.5px;line-height:1.5}
.footer .brand{color:#fff;margin-bottom:12px}
.footer .brand .logo{background:var(--amber);color:var(--navy)}
.footer .pbn-col li{padding:9px 0;border-bottom:1px dashed rgba(255,255,255,.1)}
.footer .pbn-col li:last-child{border:0}
.footer .pbn-col li .desc{display:block;font-size:12.5px;color:#8895ad;margin-top:2px;font-weight:400}
.footer .copyright{margin-top:36px;padding-top:24px;border-top:1px solid var(--navy-3);font-size:13px;color:#8895ad;display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px}
.footer .copyright a{color:#bcc5d6}

/* ============ 404 / empty ============ */
.empty{color:var(--muted);text-align:center;padding:64px 24px;background:var(--paper);border:1px dashed var(--line-strong);border-radius:var(--radius);margin:40px 0}
.empty h2{margin:0 0 8px}
.notfound{text-align:center;padding:80px 24px}
.notfound h1{font-size:120px;line-height:1;margin:0 0 8px;color:var(--amber)}
.notfound p{font-size:18px;color:var(--muted);max-width:520px;margin:0 auto 24px}

/* ============ Pagination ============ */
.pagination{display:flex;gap:8px;justify-content:center;margin:32px 0;flex-wrap:wrap}
.pagination a,.pagination span{padding:9px 16px;border-radius:10px;background:var(--paper);border:1px solid var(--line-strong);font-weight:600;font-size:14px;color:var(--navy);min-width:42px;text-align:center}
.pagination a:hover{background:var(--navy);color:#fff;text-decoration:none;border-color:var(--navy)}
.pagination .current{background:var(--navy);color:var(--amber);border-color:var(--navy)}

/* ============ Subject hero ============ */
.subject-hero{background:var(--cream-2);padding:48px 0 32px;border-bottom:1px solid var(--line)}

/* ============ Practice Q layout ============ */
.practice-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;margin-bottom:18px}
.practice-card .pq-num{display:inline-block;background:var(--amber);color:var(--navy);font-weight:800;width:32px;height:32px;border-radius:50%;text-align:center;line-height:32px;font-size:14px;margin-right:10px;vertical-align:middle}
.practice-card .pq-stem{font-family:"Fraunces",serif;font-size:18px;color:var(--navy);font-weight:600;margin:8px 0 16px;line-height:1.4}
.practice-card .pq-choices{list-style:none;padding:0;margin:0 0 16px;display:flex;flex-direction:column;gap:8px}
.practice-card .pq-choices li{padding:11px 16px;background:var(--cream-2);border:1px solid var(--line);border-radius:10px;font-size:15px}
.practice-card .pq-choices li.correct{background:#eaf5e6;border-color:var(--good);color:var(--good);font-weight:600}
.practice-card .pq-choices li .letter{display:inline-block;font-weight:700;color:var(--amber-2);margin-right:10px;width:20px}
.practice-card .pq-explain{padding:14px 16px;background:#f7f1e1;border-left:3px solid var(--amber);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:14.5px;line-height:1.6;color:var(--navy)}
.practice-card .pq-explain strong{color:var(--amber-2)}

/* helper */
.muted{color:var(--muted)}
.center{text-align:center}