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3rem;--space-16: 4rem;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-paper: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .04);--shadow-paper-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -2px rgba(0, 0, 0, .04);--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-full: 9999px;--max-width: 1200px;--header-height: 64px}@media(prefers-color-scheme:dark){:root{--color-bg: #0b0f19;--color-surface: #131b2e;--color-surface-subtle: #1e293b;--color-border: #243048;--color-border-hover: #334466;--color-text: #f1f5f9;--color-text-muted: #94a3b8;--color-accent: #3b82f6;--color-accent-hover: #60a5fa;--color-accent-subtle: #1e293b;--color-focus-ring: rgba(59, 130, 246, .5);--shadow-paper: 0 4px 12px rgba(0, 0, 0, .4);--shadow-paper-lg: 0 12px 24px rgba(0, 0, 0, .5)}}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-family:var(--font-sans);font-size:16px;line-height:var(--line-height-normal);color:var(--color-text);background-color:var(--color-bg);-webkit-text-size-adjust:100%;-webkit-font-smoothing:antialiased}body{min-height:100vh;display:flex;flex-direction:column}.skip-link{position:absolute;top:-100px;left:var(--space-4);background-color:var(--color-accent);color:#fff;padding:var(--space-2) var(--space-4);border-radius:var(--radius-sm);font-weight:600;text-decoration:none;z-index:1000;transition:top .2s ease-in-out}.skip-link:focus{top:var(--space-4);outline:2px solid var(--color-text);outline-offset:2px}:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}a{color:var(--color-accent);text-decoration:none}p a,li a{text-decoration:underline;text-underline-offset:2px}a:hover{text-decoration:underline}.site-brand,.site-nav a,.footer-nav a,.btn,.size-chip{text-decoration:none}h1,h2,h3,h4,h5,h6{color:var(--color-text);line-height:var(--line-height-tight)}.site-header{border-bottom:1px solid var(--color-border);background-color:var(--color-surface);background-image:linear-gradient(to right,var(--color-border) 1px,transparent 1px),linear-gradient(to bottom,var(--color-border) 1px,transparent 1px);background-size:20px 20px;position:relative}.site-header-inner{max-width:var(--max-width);margin:0 auto;padding:var(--space-3) var(--space-4);display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);background-color:#ffffffeb;backdrop-filter:blur(4px)}@media(prefers-color-scheme:dark){.site-header-inner{background-color:#131b2eeb}}.site-brand{display:inline-flex;align-items:center;gap:var(--space-2);font-weight:700;font-size:var(--font-size-lg);color:var(--color-text);text-decoration:none}.site-brand:hover{text-decoration:none}.site-nav{display:flex;align-items:center;gap:var(--space-4);list-style:none}.site-nav a{color:var(--color-text);font-size:var(--font-size-sm);font-weight:500;padding:var(--space-1) var(--space-2);border-radius:var(--radius-sm);transition:color .15s ease,background-color .15s ease}.site-nav a:hover{text-decoration:none;color:var(--color-accent);background-color:var(--color-surface-subtle)}.mobile-nav-toggle{display:none;align-items:center;justify-content:center;width:40px;height:40px;padding:0;background:transparent;border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text);cursor:pointer;transition:background-color .15s ease,border-color .15s ease}.mobile-nav-toggle:hover{background-color:var(--color-surface-subtle);border-color:var(--color-border-hover)}.mobile-nav-toggle:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.mobile-nav-toggle .icon-close,.mobile-nav-toggle[aria-expanded=true] .icon-menu{display:none}.mobile-nav-toggle[aria-expanded=true] .icon-close{display:block}@media(max-width:768px){.mobile-nav-toggle{display:inline-flex}.site-nav{display:none;position:absolute;top:100%;left:0;right:0;width:100%;flex-direction:column;align-items:stretch;background-color:var(--color-surface);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-paper-lg);padding:var(--space-3) var(--space-4);gap:var(--space-1);z-index:100}.site-nav.is-open{display:flex}.site-nav a{font-size:var(--font-size-base);font-weight:500;padding:var(--space-3) var(--space-3);border-radius:var(--radius-sm);color:var(--color-text)}.site-nav a:hover,.site-nav a:focus-visible{background-color:var(--color-surface-subtle);color:var(--color-accent)}}.site-main{flex:1;max-width:var(--max-width);width:100%;margin:0 auto;padding:var(--space-8) var(--space-4)}.site-footer{border-top:1px solid var(--color-border);background-color:var(--color-surface);margin-top:auto}.site-footer-inner{max-width:var(--max-width);margin:0 auto;padding:var(--space-8) var(--space-4);display:flex;flex-direction:column;gap:var(--space-4)}.footer-nav{display:flex;flex-wrap:wrap;gap:var(--space-4);list-style:none}.footer-nav a{color:var(--color-text-muted);font-size:var(--font-size-sm)}.footer-nav a:hover{color:var(--color-accent)}.footer-copy{color:var(--color-text-muted);font-size:var(--font-size-xs)}@media print{.site-header,.site-footer,.site-nav,.skip-link{display:none!important}body{background:#fff!important;color:#000!important}.site-main{max-width:100%!important;padding:0!important;margin:0!important}}