:root{--color-bg: #ffffff;--color-surface: #ffffff;--color-text: #0f172a;--color-muted: #475569;--color-border: #e2e8f0;--color-primary: #0ea5e9;--color-primary-600: #0284c7;--color-primary-50: #f0f9ff;--color-primary-100: #e0f2fe;--font-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--text-3xl: clamp(2rem, 3vw + 1rem, 3rem);--leading-tight: 1.25;--leading-normal: 1.6;--space-0: 0;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--space-16: 4rem;--space-20: 5rem;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0,0,0,.06);--shadow-md: 0 4px 10px rgba(2, 8, 23, .06);--shadow-lg: 0 10px 30px rgba(2, 8, 23, .08)}@media (prefers-color-scheme: dark){:root{--color-bg: #0b1220;--color-surface: #0f172a;--color-text: #e5e7eb;--color-muted: #9aa4b2;--color-border: #1f2937;--color-primary: #38bdf8;--color-primary-600: #0ea5e9;--color-primary-50: #082f49;--color-primary-100: #0c4a6e}}*{box-sizing:border-box}html{font-size:16px}html,body{height:100%}body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-sans);line-height:var(--leading-normal)}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}.container{width:100%;max-width:1100px;margin:0 auto;padding:0 var(--space-4)}header.site-header{position:sticky;top:0;z-index:20;background:color-mix(in oklab,var(--color-surface) 80%,transparent);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--color-border)}.nav{display:flex;align-items:center;justify-content:space-between;height:64px}.brand{font-weight:700;letter-spacing:.2px}.nav-list{list-style:none;display:flex;gap:1rem;margin:0;padding:0;align-items:center}.nav-list>li{position:relative}.nav-link{color:var(--color-text);padding:.25rem .5rem;border-radius:var(--radius-sm);display:inline-flex;align-items:center;gap:.25rem}.nav-link:hover{background:#f1f5f9;text-decoration:none}.has-children .nav-link:after{content:"▾";font-size:.75rem;line-height:1}.submenu{display:none;position:absolute;top:100%;left:0;min-width:180px;list-style:none;margin:0;padding:.65rem 0 .5rem;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm)}.has-children:hover .submenu,.has-children:focus-within .submenu{display:block}.submenu li{width:100%}.submenu-link{display:block;color:var(--color-text);padding:.5rem .75rem}.submenu-link:hover{background:#f8fafc;text-decoration:none}main{padding:var(--space-8) 0 var(--space-12)}footer.site-footer{border-top:1px solid var(--color-border);padding:var(--space-8) 0;color:var(--color-muted);font-size:.9375rem}.hero{padding:var(--space-8) 0 var(--space-2)}.hero h1{font-size:var(--text-3xl);line-height:var(--leading-tight);margin:0 0 var(--space-2)}.intro{color:var(--color-muted);max-width:65ch}.section{padding:var(--space-8) 0;border-top:1px solid var(--color-border)}.section h2{margin:0 0 .5rem;font-size:1.375rem}.section p{margin:.5rem 0 0;color:var(--color-muted)}.section.section--tight{padding-top:var(--space-6);padding-bottom:var(--space-6)}.section.section--loose{padding-top:var(--space-12);padding-bottom:var(--space-12)}.cta-band{margin-top:var(--space-8);background:var(--color-primary-50);border:1px solid var(--color-primary-100);border-radius:var(--radius-lg);padding:var(--space-5)}.cta-row{display:flex;flex-wrap:wrap;align-items:center;gap:1rem;justify-content:space-between}.cta-text{color:var(--color-muted)}.btn{display:inline-flex;align-items:center;gap:.5rem;border:1px solid transparent;background:var(--color-primary);color:#fff;padding:.6rem 1rem;border-radius:var(--radius-md);font-weight:600}.btn:hover{background:var(--color-primary-600);text-decoration:none}.stack,.grid{display:grid;gap:var(--space-4)}.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}@media (max-width: 900px){.grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width: 600px){.grid--3{grid-template-columns:1fr}}.spacer{height:var(--space-4)}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.card-body{padding:var(--space-5)}.card-title{font-size:var(--text-xl);margin:0 0 var(--space-2)}.card-subtitle{color:var(--color-muted);margin:0 0 var(--space-4)}.btn--secondary{background:transparent;color:var(--color-text);border-color:var(--color-border)}.btn--secondary:hover{background:#f1f5f9}.btn--ghost{background:transparent;color:var(--color-text);border-color:transparent}.btn--ghost:hover{background:#f8fafc}