:root{--vivid-blue:#36f;--sky-blue:#39c4ff;--lavender-purple:#8a61ff;--pure-white:#fff;--silver-gray:#e5e5e5;--total-black:#000;--text-primary:var(--total-black);--text-secondary:#6b6b6b;--text-tertiary:#9a9a9a;--border-color:var(--silver-gray);--radius-xl:32px;--radius-lg:24px;--radius-md:16px;--radius-sm:8px;--max-width:780px;--max-width-wide:1080px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{color:var(--text-primary);background:var(--pure-white);font-family:Open Sans,sans-serif;font-weight:400;line-height:1.6}a{color:var(--vivid-blue);text-decoration:none}a:hover{text-decoration:underline}.header{background:var(--pure-white);border-bottom:1px solid var(--border-color);z-index:100;position:sticky;top:0}.header-inner{max-width:var(--max-width-wide);align-items:center;margin:0 auto;padding:14px 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12px}@media (width>=960px){.toc-mobile{display:none}}.footer{border-top:1px solid var(--border-color);padding:32px 24px}.footer-inner{max-width:var(--max-width-wide);justify-content:space-between;align-items:center;margin:0 auto;display:flex}.footer-logo{align-items:center;text-decoration:none;display:flex}.footer-logo:hover{text-decoration:none}.footer-logo-img{opacity:.5;width:auto;height:20px;display:block}.footer-text{color:var(--text-tertiary);font-size:13px}.loading{text-align:center;color:var(--text-tertiary);padding:64px 0;font-size:15px}@media (width<=640px){.hero h1{font-size:24px}.cards-grid{grid-template-columns:1fr}.footer-inner{flex-direction:column;gap:12px}.collection-header h1,.article-header h1{font-size:22px}}