.site-header[data-astro-cid-3ef6ksr2]{position:sticky;top:0;z-index:100;background:#fffffff2;backdrop-filter:blur(12px);border-bottom:1px solid var(--border);height:var(--header-h)}.header-inner[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;justify-content:space-between;height:100%}.logo[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;gap:10px;transition:opacity .2s}.logo[data-astro-cid-3ef6ksr2]:hover{opacity:.7}.logo-icon[data-astro-cid-3ef6ksr2]{width:28px;height:28px;flex-shrink:0}.logo-sep[data-astro-cid-3ef6ksr2]{color:var(--border-dark);font-weight:300;font-size:1.4rem}.logo-sub[data-astro-cid-3ef6ksr2]{font-size:.75rem;font-weight:600;color:var(--text-secondary);letter-spacing:.08em;text-transform:uppercase}.nav[data-astro-cid-3ef6ksr2]{display:flex;gap:20px;align-items:center}.nav-link[data-astro-cid-3ef6ksr2]{font-size:.85rem;font-weight:500;color:var(--text-secondary);transition:color .2s;background:none;border:none;cursor:pointer;font-family:inherit}.nav-link[data-astro-cid-3ef6ksr2]:hover{color:var(--brand)}.nav-dropdown[data-astro-cid-3ef6ksr2]{position:relative}.dropdown-panel[data-astro-cid-3ef6ksr2]{display:none;position:absolute;top:100%;left:50%;transform:translate(-50%);margin-top:8px;padding:8px 0;background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:0 4px 16px #00000014;min-width:180px}.nav-dropdown[data-astro-cid-3ef6ksr2].open .dropdown-panel[data-astro-cid-3ef6ksr2]{display:flex;flex-direction:column}.dropdown-panel[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{padding:8px 16px;font-size:.85rem;color:var(--text-secondary);transition:all .15s}.dropdown-panel[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]:hover{background:var(--bg-muted);color:var(--brand)}.nav-cta[data-astro-cid-3ef6ksr2]{padding:7px 16px;background:var(--brand);color:#fff!important;border-radius:var(--radius-pill);font-weight:600;font-size:.8rem;transition:background .2s}.nav-cta[data-astro-cid-3ef6ksr2]:hover{background:var(--brand-hover)}.locale-btn[data-astro-cid-3ef6ksr2]{font-size:.78rem}.locale-panel[data-astro-cid-3ef6ksr2]{max-height:320px;overflow-y:auto;right:0;left:auto;transform:none}.locale-panel[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{white-space:nowrap}@media(max-width:768px){.nav[data-astro-cid-3ef6ksr2]{gap:12px}.nav-link[data-astro-cid-3ef6ksr2]{font-size:.78rem}}.brand-footer[data-astro-cid-kkc5zoub]{border-top:1px solid var(--border);padding:64px 0 32px;margin-top:64px}.footer-top[data-astro-cid-kkc5zoub]{display:flex;justify-content:space-between;align-items:flex-start;gap:48px}.footer-brand[data-astro-cid-kkc5zoub]{font-family:var(--font-heading);font-size:clamp(3rem,8vw,4.5rem);font-weight:700;line-height:1;color:var(--text)}.footer-columns[data-astro-cid-kkc5zoub]{display:flex;gap:48px}.footer-col[data-astro-cid-kkc5zoub]{display:flex;flex-direction:column;gap:6px}.footer-col-title[data-astro-cid-kkc5zoub]{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-tertiary);margin:0 0 6px}.footer-col[data-astro-cid-kkc5zoub] a[data-astro-cid-kkc5zoub]{font-size:.85rem;color:var(--text-secondary);transition:color .2s}.footer-col[data-astro-cid-kkc5zoub] a[data-astro-cid-kkc5zoub]:hover{color:var(--brand)}.footer-bottom[data-astro-cid-kkc5zoub]{margin-top:40px;padding-top:20px;border-top:1px solid var(--border);font-size:.75rem;color:var(--text-tertiary)}@media(max-width:768px){.footer-top[data-astro-cid-kkc5zoub]{flex-direction:column;gap:32px}.footer-columns[data-astro-cid-kkc5zoub]{flex-direction:column;gap:28px}}.prose{max-width:68ch;font-size:1.125rem;line-height:1.75;color:var(--text)}.prose h2{font-family:var(--font-heading);font-size:1.65rem;font-weight:700;margin:56px 0 16px;letter-spacing:-.01em}.prose h3{font-family:var(--font-heading);font-size:1.25rem;font-weight:600;margin:40px 0 12px}.prose p{margin:20px 0}.prose strong{font-weight:600}.prose ul,.prose ol{padding-left:1.5rem;margin:20px 0}.prose li{margin-bottom:8px}.prose li::marker{color:var(--brand)}.prose a{color:var(--brand-link);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--brand-subtle)}.prose a:hover{text-decoration-color:var(--brand-link)}.prose img{border-radius:var(--radius);margin:28px 0;box-shadow:var(--shadow-sm)}.prose code{font-family:var(--font-mono);font-size:.85em;background:var(--bg-muted);padding:.15em .4em;border-radius:4px}.prose pre{background:#1e293b;color:#e2e8f0;padding:1rem 1.25rem;border-radius:var(--radius);overflow-x:auto;margin:1.5rem 0;line-height:1.6;font-size:.85rem}.prose pre code{background:none;padding:0;border-radius:0;color:inherit;font-size:inherit}.prose .katex-display{margin:1.5rem 0;overflow-x:auto;overflow-y:hidden;padding:.25rem 0}.prose .katex{font-size:1.1em}.prose table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.9rem}.prose th,.prose td{padding:8px 12px;border:1px solid var(--border);text-align:left}.prose th{background:var(--bg-subtle);font-weight:600}.callout{margin:28px 0;padding:18px 20px;border-left:4px solid;border-radius:0 var(--radius-sm) var(--radius-sm) 0}.callout-label{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px}.callout p{margin:0;font-size:1rem;line-height:1.7}.callout--formula{background:var(--formula-bg);border-color:var(--formula-border)}.callout--formula .callout-label{color:var(--formula-border)}.callout--definition{background:var(--definition-bg);border-color:var(--definition-border)}.callout--definition .callout-label{color:var(--definition-border)}.callout--example{background:var(--example-bg);border-color:var(--example-border)}.callout--example .callout-label{color:var(--example-border)}.callout--warning{background:var(--warning-bg);border-color:var(--warning-border)}.callout--warning .callout-label{color:var(--warning-border)}.callout--takeaway{background:var(--takeaway-bg);border-color:var(--takeaway-border)}.callout--takeaway .callout-label{color:var(--takeaway-border)}.formula-panel{margin:28px 0;padding:20px 24px;background:var(--bg-subtle);border:1px solid var(--border);border-radius:var(--radius);text-align:left}.formula-panel .formula-label{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-tertiary);margin-bottom:10px}.formula-panel .formula-content{font-family:var(--font-heading);font-size:1.2rem;font-style:italic;color:var(--text)}@media(max-width:768px){.prose{font-size:1rem}.prose h2{font-size:1.35rem;margin-top:40px}.prose h3{font-size:1.1rem;margin-top:28px}}
