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18px;color:#536b77;line-height:1.5;font-size:.94rem}.article-meta{margin-top:auto;display:flex;align-items:center;gap:8px;color:#72848c;font-size:.82rem}.empty-state{background:#fff;border:1px dashed #b9ccd2;border-radius:14px;padding:50px 28px;text-align:center;color:#5f737c}.empty-state svg{width:48px;height:48px;margin:0 auto 14px;stroke:#0b7b87}.empty-state h3{margin:0 0 8px;color:var(--navy);font-size:1.35rem}.empty-state p{max-width:590px;margin:0 auto;line-height:1.6}.sidebar{display:grid;gap:18px}.side-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:18px;box-shadow:0 6px 20px rgba(18,53,66,.04)}.side-card h2{margin:0 0 14px;color:var(--navy);font-size:1.18rem}.featured-placeholder{min-height:160px;border-radius:9px;background:linear-gradient(135deg,rgba(15,92,111,.82),rgba(20,127,134,.55)),url("hero-diamond-head.jpg") center/cover;color:#fff;padding:18px;display:flex;flex-direction:column;justify-content:flex-end}.featured-placeholder p{margin:0}.featured-placeholder .small{font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;font-weight:800;margin-bottom:6px}.featured-placeholder .title{font-size:1.15rem;line-height:1.25;font-weight:800}.popular-topics{list-style:none;padding:0;margin:0;display:grid;gap:1px}.popular-topics li{border-bottom:1px solid #e5edef}.popular-topics li:last-child{border-bottom:0}.popular-topics button{width:100%;border:0;background:transparent;padding:10px 0;display:flex;justify-content:space-between;gap:12px;color:#126e9b;font:inherit;text-align:left;cursor:pointer}.popular-topics button:hover{text-decoration:underline}.popular-topics span:last-child{color:#83949c}.library-note{background:linear-gradient(135deg,#e6f4f6,#d8edf1)}.library-note p{color:#42616d;line-height:1.55;margin:0}.site-footer{background:#162a33;color:#d7e1e4;padding:30px 0 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5px);left:18px;right:18px;background:var(--charcoal);padding:10px;border-radius:12px;flex-direction:column;align-items:stretch;box-shadow:0 16px 32px rgba(0,0,0,.2)}.site-nav.is-open{display:flex}.site-nav a{width:100%}.library-grid{grid-template-columns:1fr}.sidebar{grid-template-columns:repeat(2,minmax(0,1fr))}.sidebar .library-note{grid-column:1/-1}.footer-inner{align-items:flex-start;flex-direction:column}.footer-links{justify-content:flex-start}}@media(max-width:680px){.container{width:min(calc(100% - 28px),var(--max))}.header-inner{min-height:76px}.brand{width:min(300px,72vw)}.articles-hero{min-height:265px}.articles-hero .container{padding:38px 0}.article-search{grid-template-columns:1fr}.article-search button{min-height:48px}.article-grid{grid-template-columns:1fr}.sidebar{grid-template-columns:1fr}.section-head{align-items:flex-start;flex-direction:column;gap:6px}.topic-pills{justify-content:flex-start}.footer-brand{align-items:flex-start;flex-direction:column}.footer-brand 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