html{-webkit-text-size-adjust:100%}
body{padding-bottom:env(safe-area-inset-bottom)}
.announcement{padding-top:max(10px,env(safe-area-inset-top))}
.knowledge-hero{padding:42px 0 58px}
.knowledge-hero-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(300px,.75fr);gap:36px;align-items:start}
.knowledge-hero h1{font-size:clamp(42px,7vw,76px)}
.knowledge-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.knowledge-tabs a{display:inline-flex;align-items:center;min-height:44px;padding:9px 14px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.04);color:#e5f1f4;text-decoration:none;font-weight:800}
.knowledge-tabs a:hover,.knowledge-tabs a:focus-visible{border-color:var(--cyan);color:var(--cyan)}
.knowledge-principles{border:1px solid var(--line);border-radius:26px;padding:26px;background:linear-gradient(155deg,rgba(115,212,223,.12),rgba(13,27,36,.9));box-shadow:0 20px 60px rgba(0,0,0,.22)}
.knowledge-principles h2{font-size:30px}
.knowledge-principles ul{display:grid;gap:10px;margin:18px 0 0;padding:0;list-style:none}
.knowledge-principles li{position:relative;padding-left:27px;color:#d4e2e6}
.knowledge-principles li::before{content:"✓";position:absolute;left:0;color:var(--cyan);font-weight:900}
.knowledge-categories{padding-bottom:62px}
.knowledge-category{padding:52px 0;border-top:1px solid rgba(31,67,80,.7);scroll-margin-top:100px}
.knowledge-category-heading{display:grid;grid-template-columns:minmax(0,.9fr) minmax(280px,1.1fr);gap:30px;align-items:end;margin-bottom:24px}
.knowledge-category-heading h2{margin-bottom:0}
.knowledge-category-heading>p{margin:0;color:#b8c7cd;font-size:17px}
.knowledge-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.knowledge-card{display:flex;min-width:0;flex-direction:column;border:1px solid var(--line);border-radius:22px;padding:23px;background:rgba(13,27,36,.76)}
.knowledge-card h2{font-size:25px;letter-spacing:-.035em}
.knowledge-card h2 a{text-decoration:none}
.knowledge-card h2 a:hover,.knowledge-card h2 a:focus-visible{color:var(--cyan)}
.knowledge-card>p:not(.kicker){margin:0;color:#b9c7cd}
.knowledge-card-link{display:inline-flex;align-items:center;gap:8px;min-height:44px;margin-top:auto;padding-top:20px;color:var(--cyan);font-weight:850;text-decoration:none}
.knowledge-card-link span{transition:transform .15s ease}
.knowledge-card-link:hover span,.knowledge-card-link:focus-visible span{transform:translateX(3px)}
.knowledge-article-hero{padding:40px 0 46px}
.knowledge-article-hero-inner{max-width:920px}
.knowledge-article-hero h1{max-width:880px}
.direct-answer{margin:26px 0 0;padding:21px 23px;border:1px solid rgba(115,212,223,.4);border-radius:20px;background:rgba(115,212,223,.09);color:#e4f7f9;font-size:18px;line-height:1.65}
.article-meta{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:24px 0 0}
.article-meta>div{border:1px solid rgba(31,67,80,.8);border-radius:16px;padding:13px;background:rgba(13,27,36,.58)}
.article-meta dt{margin-bottom:3px;color:#8fa4ad;font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase}
.article-meta dd{margin:0;color:#eef5f7;font-size:14px}
.article-meta a{text-underline-offset:3px}
.article-layout{display:grid;grid-template-columns:minmax(200px,250px) minmax(0,780px);gap:48px;align-items:start;padding:16px 0 72px}
.article-toc{position:sticky;top:106px;border:1px solid var(--line);border-radius:20px;padding:20px;background:rgba(13,27,36,.8)}
.article-toc ol{display:grid;gap:10px;margin:0;padding-left:19px;color:#aebec4;font-size:14px}
.article-toc a{text-decoration:none}
.article-toc a:hover,.article-toc a:focus-visible{color:var(--cyan);text-decoration:underline;text-underline-offset:3px}
.knowledge-article{min-width:0}
.knowledge-section{padding:38px 0;border-top:1px solid rgba(31,67,80,.72);scroll-margin-top:104px}
.knowledge-section:first-of-type{border-top:0}
.knowledge-section h2{font-size:clamp(29px,4vw,40px)}
.knowledge-section h3{margin:28px 0 11px;font-size:23px}
.knowledge-section p,.knowledge-section li{color:#d3dee2}
.knowledge-section p{margin:0 0 18px}
.knowledge-section ul,.knowledge-section ol{display:grid;gap:10px;padding-left:24px}
.knowledge-section a,.references a{color:#a9edf2;text-decoration-thickness:1px;text-underline-offset:3px;overflow-wrap:anywhere}
.article-summary{margin-bottom:28px;border:1px solid var(--line);border-radius:22px;padding:24px;background:linear-gradient(145deg,rgba(95,148,170,.16),rgba(13,27,36,.72))}
.article-summary h2{font-size:28px}
.article-summary ul{display:grid;gap:10px;margin:0;padding-left:22px;color:#dce8eb}
.knowledge-table-wrap{max-width:100%;margin:24px 0;overflow-x:auto;border:1px solid var(--line);border-radius:18px;-webkit-overflow-scrolling:touch}
.knowledge-table-wrap table{width:100%;min-width:620px;border-collapse:collapse;background:rgba(7,16,23,.55);font-size:15px}
.knowledge-table-wrap th,.knowledge-table-wrap td{padding:14px 16px;border-bottom:1px solid rgba(31,67,80,.72);text-align:left;vertical-align:top}
.knowledge-table-wrap th{background:rgba(115,212,223,.1);color:#eef9fa}
.knowledge-table-wrap tr:last-child td{border-bottom:0}
.known-unknown-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:24px 0}
.knowledge-callout{border:1px solid var(--line);border-radius:20px;padding:20px;background:rgba(13,27,36,.72)}
.knowledge-callout.known{border-color:rgba(117,213,166,.45)}
.knowledge-callout.uncertain{border-color:rgba(232,192,107,.45)}
.knowledge-callout h3{margin-top:0}
.knowledge-callout ul{margin-bottom:0}
.references ol{display:grid;gap:18px;padding-left:24px}
.references li{padding-left:4px}
.references li>a{display:block;font-weight:850}
.references li>span{display:block;margin-top:4px;color:#aebec4;font-size:14px}
.article-disclaimer{margin:12px 0 0;border-left:4px solid var(--warn);border-radius:0 18px 18px 0;padding:20px 22px;background:rgba(232,192,107,.08)}
.article-disclaimer h2{margin:0 0 10px;font-size:25px}
.article-disclaimer p{margin:0;color:#d9e1e4}
.related-knowledge-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:24px}
.related-knowledge-card{display:flex;flex-direction:column;gap:8px;min-height:170px;border:1px solid var(--line);border-radius:20px;padding:21px;background:rgba(13,27,36,.72);text-decoration:none}
.related-knowledge-card:hover,.related-knowledge-card:focus-visible{border-color:var(--cyan)}
.related-knowledge-card strong{font-family:Manrope,Inter,sans-serif;font-size:23px;letter-spacing:-.035em}
.related-knowledge-card>span:last-child{color:#b8c7cd}
@media(max-width:1040px){.nav{gap:13px}.nav a{font-size:14px}.article-meta{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:820px){.knowledge-hero-grid,.knowledge-category-heading{grid-template-columns:1fr}.knowledge-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-layout{grid-template-columns:1fr;gap:24px}.article-toc{position:static}.known-unknown-grid{grid-template-columns:1fr}}
@media(max-width:600px){.knowledge-hero{padding:30px 0 42px}.knowledge-principles{padding:20px}.knowledge-grid,.related-knowledge-grid,.article-meta{grid-template-columns:1fr}.knowledge-category{padding:40px 0}.knowledge-card{padding:20px}.knowledge-article-hero{padding:28px 0 34px}.direct-answer{padding:18px;font-size:16px}.article-layout{padding-bottom:52px}.article-toc{padding:18px}.knowledge-section{padding:32px 0}.knowledge-table-wrap{margin-right:-2px}.knowledge-table-wrap table{min-width:560px}.related-knowledge-card{min-height:0}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}