:root{
  --bg:#f9f6f0;
  --surface:#ffffff;
  --card:#ffffff;
  --border:rgba(12,35,80,0.12);
  --border-gold:rgba(200,169,110,0.4);
  --gold:#866930;
  --gold-lt:#6b5426;
  --muted:#5b6a85;
  --body:#3d4a63;
  --white:#0c2350;
  --green:#167d4e;
  --blue:#3370b5;
  --red:#ce382c;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--body);font-family:'DM Sans',sans-serif;overflow-x:hidden;line-height:1.6}

/* Slim gold scroll-progress bar */
.scroll-progress{position:fixed;top:0;left:0;height:3px;width:0%;background:linear-gradient(90deg,var(--gold),var(--gold-lt));z-index:9999;box-shadow:0 0 8px rgba(200,169,110,.5)}

/* NAV */
nav:not(.breadcrumbs){
  --gold:#c8a96e;--gold-lt:#e2c98a;
  position:fixed;top:0;left:0;right:0;z-index:999;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 56px;
  background:rgba(6,16,31,0.95);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border-gold)
}
.nav-logo{font-family:'Playfair Display',serif;font-size:1.45rem;font-weight:700;color:var(--gold);letter-spacing:.02em}
.nav-logo span{color:var(--white)}
.nav-links{display:flex;align-items:center;gap:36px}
.nav-links a{color:rgba(240,244,252,.8);font-size:.9rem;text-decoration:none;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--gold)}
.nav-cta{
  background:var(--gold);color:#06101f;
  padding:11px 24px;border-radius:5px;
  font-weight:700;font-size:.84rem;letter-spacing:.05em;
  text-decoration:none;text-transform:uppercase;
  transition:background .2s,transform .2s
}
.nav-cta:hover{background:var(--gold-lt);transform:translateY(-1px)}

/* SECTION WRAPPERS / TYPOGRAPHY (shared with main site) */
.section-label{
  font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--gold);font-weight:700;margin-bottom:12px
}
h2{
  font-family:'Playfair Display',serif;
  font-size:clamp(2rem,3.5vw,2.8rem);font-weight:700;
  line-height:1.2;color:var(--white);margin-bottom:18px
}
.divider{width:44px;height:3px;background:var(--gold);margin-bottom:36px;border-radius:2px}
.divider.center{margin-left:auto;margin-right:auto}
.sep{border:none;border-top:1px solid var(--border);margin:0}

/* Reveal-on-scroll (shared) */
.fade-in{opacity:0;transform:translateY(28px) scale(.98);transition:opacity .8s cubic-bezier(.16,1,.3,1),transform .8s cubic-bezier(.16,1,.3,1)}
.fade-in.visible{opacity:1;transform:translateY(0) scale(1)}
.stagger>*{opacity:0;transform:translateY(24px) scale(.96);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1)}
.stagger.visible>*{opacity:1;transform:translateY(0) scale(1)}
.stagger>*:nth-child(1){transition-delay:.04s}
.stagger>*:nth-child(2){transition-delay:.10s}
.stagger>*:nth-child(3){transition-delay:.16s}
.stagger>*:nth-child(4){transition-delay:.22s}
.stagger>*:nth-child(5){transition-delay:.28s}
.stagger>*:nth-child(6){transition-delay:.34s}

/* ARTICLE HERO */
.article-hero{max-width:760px;margin:0 auto;padding:150px 24px 10px}
.article-back{display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-size:.85rem;text-decoration:none;margin-bottom:22px}
.article-back:hover{color:var(--gold)}
.article-eyebrow{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--gold);font-weight:700;margin-bottom:14px}
.article-hero h1{font-family:'Playfair Display',serif;font-size:clamp(2rem,4.2vw,2.9rem);font-weight:900;line-height:1.22;color:var(--white);margin-bottom:18px;letter-spacing:-.01em}
.article-meta{display:flex;gap:14px;flex-wrap:wrap;color:var(--muted);font-size:.83rem;margin-bottom:18px}
.article-dek{font-size:1.08rem;color:var(--body);line-height:1.75;padding-bottom:28px;border-bottom:1px solid var(--border)}

/* ARTICLE BODY TYPOGRAPHY */
.article-body{max-width:760px;margin:0 auto;padding:36px 24px 60px}
.article-body h2{font-size:clamp(1.45rem,2.6vw,1.85rem);margin-top:46px;margin-bottom:16px}
.article-body h3{font-family:'Playfair Display',serif;font-size:1.22rem;font-weight:700;color:var(--white);margin-top:30px;margin-bottom:12px}
.article-body p{font-size:1rem;line-height:1.85;color:var(--body);margin-bottom:20px}
.article-body ul,.article-body ol{margin:0 0 20px 22px;color:var(--body);line-height:1.85}
.article-body li{margin-bottom:9px}
.article-body strong{color:var(--white);font-weight:700}
.article-body a{color:var(--gold-lt);text-decoration:underline;text-underline-offset:2px}
.article-body a:hover{color:var(--gold)}
.article-body blockquote{border-left:4px solid var(--gold);background:rgba(200,169,110,.08);padding:18px 22px;border-radius:0 8px 8px 0;margin:26px 0;font-style:italic;color:var(--white)}
.article-table-wrap{overflow-x:auto;margin:24px 0;border:1px solid var(--border);border-radius:9px}
.article-body table{width:100%;border-collapse:collapse;font-size:.87rem}
.article-body th,.article-body td{border-bottom:1px solid var(--border);padding:11px 15px;text-align:left}
.article-body th{background:var(--surface);color:var(--white);font-weight:700}
.article-body tr:last-child td{border-bottom:none}

.article-cta{background:rgba(200,169,110,.08);border:1px solid rgba(200,169,110,.3);border-radius:10px;padding:30px 28px;margin:40px 0;text-align:center}
.article-cta p{color:var(--white);font-size:1rem;margin-bottom:0}
.article-cta .btn-primary,.article-cta .btn-ghost{margin-top:18px}
.btn-primary{
  background:var(--gold);color:#06101f;
  padding:14px 28px;border-radius:6px;font-weight:700;font-size:.88rem;
  text-decoration:none;letter-spacing:.04em;text-transform:uppercase;
  transition:all .25s;border:none;cursor:pointer;display:inline-block
}
.btn-primary:hover{background:var(--gold-lt);transform:translateY(-2px);box-shadow:0 10px 28px rgba(200,169,110,.3)}

.article-footnote{font-size:.82rem;color:var(--muted);line-height:1.7;margin-top:40px;padding-top:20px;border-top:1px solid var(--border)}

/* BLOG INDEX */
.blog-hero{max-width:820px;margin:0 auto;padding:150px 24px 10px;text-align:center}
.blog-hero h1{font-family:'Playfair Display',serif;font-size:clamp(2.2rem,4.4vw,3.1rem);font-weight:900;line-height:1.2;color:var(--white);margin-bottom:16px}
.blog-hero p{font-size:1.02rem;color:var(--muted);line-height:1.8;max-width:560px;margin:0 auto}
.blog-grid{max-width:1000px;margin:44px auto 110px;padding:0 24px;display:grid;grid-template-columns:1fr 1fr;gap:22px}
.blog-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:28px;text-decoration:none;transition:border-color .25s,transform .25s;display:block}
.blog-card:hover{border-color:var(--border-gold);transform:translateY(-3px)}
.blog-card-eyebrow{font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--gold);font-weight:700;margin-bottom:12px}
.blog-card h3{font-family:'Playfair Display',serif;font-size:1.28rem;color:var(--white);margin-bottom:12px;line-height:1.35}
.blog-card p{color:var(--muted);font-size:.89rem;line-height:1.7;margin-bottom:14px}
.blog-card-read{color:var(--gold-lt);font-size:.82rem;font-weight:700}

/* FOOTER (shared) */
footer{
  --gold:#c8a96e;
  background:#0c2350;border-top:1px solid rgba(200,169,110,.25);
  padding:48px 56px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap
}
.footer-logo{font-family:'Playfair Display',serif;font-size:1.3rem;font-weight:700;color:var(--gold)}
.footer-logo span{color:var(--white)}
.footer-logo p{font-family:'DM Sans',sans-serif;font-size:.76rem;color:rgba(240,244,252,.6);margin-top:4px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-link{display:flex;align-items:center;gap:10px;color:rgba(240,244,252,.75);font-size:.88rem;text-decoration:none;transition:color .2s}
.footer-link:hover{color:var(--gold)}
.footer-copy{color:rgba(240,244,252,.4);font-size:.76rem}
.footer-social{display:flex;gap:10px}
.social-link{width:36px;height:36px;border-radius:50%;border:1px solid rgba(240,244,252,.2);display:flex;align-items:center;justify-content:center;color:rgba(240,244,252,.75);transition:color .2s,border-color .2s,transform .2s}
.social-link:hover{color:var(--gold);border-color:var(--border-gold);transform:translateY(-2px)}

/* FAQ ACCORDION (ported from main site) */
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:9px;overflow:hidden;transition:border-color .25s}
.faq-item[open]{border-color:var(--border-gold)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;cursor:pointer;list-style:none;
  font-size:.92rem;font-weight:700;color:var(--white)
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::marker{content:''}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  background:rgba(200,169,110,.12);color:var(--gold);
  display:flex;align-items:center;justify-content:center;
  font-size:1rem;font-weight:700;transition:transform .25s
}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-answer{padding:0 24px 22px;font-size:.85rem;color:var(--muted);line-height:1.75}

/* CONTENT BOXES (tip / warning / exam strategy / checklist / pullquote / passage / grammar) */
.content-box{border-radius:10px;padding:20px 22px;margin:26px 0;border:1px solid var(--border)}
.content-box-label{font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;margin-bottom:10px}
.content-box-body{color:var(--body);font-size:.95rem;line-height:1.8}
.content-box-body p:last-child{margin-bottom:0}
.box-tip{background:rgba(51,112,181,.06);border-color:rgba(51,112,181,.25)}
.box-tip .content-box-label{color:var(--blue)}
.box-warning{background:rgba(206,56,44,.06);border-color:rgba(206,56,44,.25)}
.box-warning .content-box-label{color:var(--red)}
.box-strategy{background:rgba(200,169,110,.08);border-color:var(--border-gold)}
.box-strategy .content-box-label{color:var(--gold)}
.box-checklist{background:rgba(22,125,78,.06);border-color:rgba(22,125,78,.25)}
.box-checklist .content-box-label{color:var(--green)}
.box-checklist ul{list-style:none;margin-left:0}
.box-checklist li{padding-left:28px;position:relative;margin-bottom:10px}
.box-checklist li::before{content:'✓';position:absolute;left:0;color:var(--green);font-weight:700}
.box-passage{background:var(--surface);font-family:'Playfair Display',serif;font-style:italic}
.box-grammar{background:rgba(134,105,48,.05)}
.box-pullquote{border:none;border-left:4px solid var(--gold);background:rgba(200,169,110,.06);padding:18px 24px}
.box-pullquote .content-box-body{font-family:'Playfair Display',serif;font-size:1.15rem;font-style:italic;color:var(--white)}

/* VOCAB CARD */
.vocab-card{border:1px solid var(--border-gold);background:rgba(200,169,110,.05);border-radius:10px;padding:18px 22px;margin:22px 0}
.vocab-word{font-family:'Playfair Display',serif;font-size:1.15rem;font-weight:700;color:var(--white);display:flex;align-items:baseline;gap:10px}
.vocab-pos{font-family:'DM Sans',sans-serif;font-size:.72rem;font-weight:400;font-style:italic;color:var(--muted)}
.vocab-def{color:var(--body);font-size:.92rem;margin-top:6px}
.vocab-example{color:var(--muted);font-size:.86rem;font-style:italic;margin-top:8px}

/* VIDEO / DESMOS EMBEDS */
.video-embed{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:10px;margin:26px 0;border:1px solid var(--border)}
.video-embed iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:0}
.desmos-embed{margin:26px 0}

/* PDF DOWNLOAD */
.pdf-download{display:inline-flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:14px 20px;text-decoration:none;color:var(--white);font-weight:700;font-size:.9rem;margin:20px 0;transition:border-color .2s}
.pdf-download:hover{border-color:var(--border-gold)}
.pdf-icon{font-size:1.2rem}
.pdf-arrow{color:var(--gold);margin-left:4px}

/* READING PROGRESS (article-specific, thicker than global scroll bar) */
.reading-progress-track{position:sticky;top:0;height:3px;background:var(--border);z-index:50}
.reading-progress-fill{height:100%;background:var(--gold);width:0%;transition:width .1s linear}

/* TABLE OF CONTENTS */
.toc-box{border:1px solid var(--border);border-radius:10px;padding:20px 24px;margin:8px 0 36px;background:var(--surface)}
.toc-title{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--gold);margin-bottom:12px}
.toc-list{list-style:none;display:flex;flex-direction:column;gap:8px}
.toc-list a{color:var(--body);font-size:.88rem;text-decoration:none;transition:color .2s}
.toc-list a:hover{color:var(--gold-lt)}
.toc-list .toc-h3{padding-left:16px;font-size:.84rem}

/* BREADCRUMBS */
.breadcrumbs{max-width:760px;margin:0 auto;padding:110px 24px 0;font-size:.8rem;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.breadcrumbs a{color:var(--muted);text-decoration:none}
.breadcrumbs a:hover{color:var(--gold)}
.breadcrumbs .sep{color:var(--border)}

/* CATEGORY BADGE / TAG LIST */
.category-badge{display:inline-block;background:rgba(200,169,110,.12);color:var(--gold-lt);font-size:.7rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:5px 12px;border-radius:100px;text-decoration:none}
.category-badge:hover{background:rgba(200,169,110,.2)}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
.tag-pill{display:inline-block;background:var(--surface);border:1px solid var(--border);color:var(--muted);font-size:.76rem;padding:5px 13px;border-radius:100px;text-decoration:none;transition:border-color .2s,color .2s}
.tag-pill:hover{border-color:var(--border-gold);color:var(--gold-lt)}

/* AUTHOR BOX */
.author-box{display:flex;gap:16px;align-items:center;border:1px solid var(--border);border-radius:12px;padding:20px 22px;margin:40px 0}
.author-avatar{width:52px;height:52px;border-radius:50%;background:var(--gold);color:#06101f;display:flex;align-items:center;justify-content:center;font-family:'Playfair Display',serif;font-weight:700;font-size:1.3rem;flex-shrink:0}
.author-name{font-weight:700;color:var(--white);font-size:.95rem}
.author-role{color:var(--muted);font-size:.82rem;margin-top:2px}

/* SHARE BUTTONS */
.share-buttons{display:flex;gap:10px;align-items:center;margin:32px 0}
.share-label{font-size:.78rem;color:var(--muted);margin-right:4px}
.share-btn{width:36px;height:36px;border-radius:50%;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--muted);text-decoration:none;transition:all .2s}
.share-btn:hover{border-color:var(--border-gold);color:var(--gold)}

/* RELATED ARTICLES / PREV-NEXT */
.related-section{max-width:1000px;margin:0 auto;padding:20px 24px 90px}
.related-title{font-family:'Playfair Display',serif;font-size:1.4rem;color:var(--white);margin-bottom:24px;text-align:center}
.prevnext-nav{max-width:760px;margin:36px auto 0;padding:0 24px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.prevnext-card{border:1px solid var(--border);border-radius:10px;padding:16px 18px;text-decoration:none;transition:border-color .2s}
.prevnext-card:hover{border-color:var(--border-gold)}
.prevnext-dir{font-size:.7rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px}
.prevnext-title{font-size:.86rem;color:var(--white);font-weight:700;line-height:1.4}
.prevnext-next{text-align:right}

/* SEARCH BOX (blog index) */
.search-box{max-width:480px;margin:32px auto 0;position:relative}
.search-input{width:100%;background:var(--card);border:1.5px solid var(--border);border-radius:8px;padding:13px 16px;color:var(--white);font-family:'DM Sans',sans-serif;font-size:.92rem;outline:none;transition:border-color .2s}
.search-input:focus{border-color:var(--gold)}
.search-results{position:absolute;top:calc(100% + 8px);left:0;right:0;background:var(--card);border:1px solid var(--border);border-radius:10px;box-shadow:0 16px 40px rgba(12,35,80,.12);z-index:20;max-height:340px;overflow-y:auto;display:none}
.search-results.active{display:block}
.search-result-item{display:block;padding:12px 16px;text-decoration:none;border-bottom:1px solid var(--border)}
.search-result-item:last-child{border-bottom:none}
.search-result-item:hover{background:var(--bg)}
.search-result-title{color:var(--white);font-size:.86rem;font-weight:700}
.search-result-meta{color:var(--muted);font-size:.74rem;margin-top:2px}
.search-empty{padding:16px;color:var(--muted);font-size:.84rem;text-align:center}

/* CATEGORY/TAG FILTER PILLS on blog index */
.filter-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:28px}
.filter-pill{border:1px solid var(--border);color:var(--muted);font-size:.8rem;padding:7px 16px;border-radius:100px;text-decoration:none;transition:all .2s}
.filter-pill:hover,.filter-pill.active{border-color:var(--gold);color:var(--gold-lt);background:rgba(200,169,110,.06)}

.nav-toggle{display:none;background:none;border:none;color:#f0f4fc;cursor:pointer;padding:6px;line-height:1}
@media(max-width:920px){
  nav:not(.breadcrumbs){padding:14px 20px}
  .nav-toggle{display:block}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:#06101f;flex-direction:column;gap:2px;padding:8px 20px 14px;border-bottom:1px solid rgba(200,169,110,.15)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.06)}
  .nav-links a:last-child{border-bottom:none}
  .article-hero{padding:120px 20px 10px}
  .article-body{padding:30px 20px 50px}
  .blog-hero{padding:120px 20px 10px}
  .blog-grid{grid-template-columns:1fr;padding:0 20px}
  footer{padding:36px 20px;flex-direction:column;align-items:flex-start}
  .breadcrumbs{padding:90px 20px 0}
  .prevnext-nav{grid-template-columns:1fr;padding:0 20px}
  .prevnext-next{text-align:left}
}
@media(max-width:480px){
  .nav-logo img{height:24px}
  .nav-cta{padding:9px 16px;font-size:.78rem}
  .article-hero h1{font-size:1.7rem}
  .blog-hero h1{font-size:1.9rem}
  footer{padding:28px 16px}
  .footer-links{gap:6px}
  .author-box{flex-direction:column;text-align:center}
}