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.subtitle{font-size:.75rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.06em;margin-top:.2rem}main{max-width:1200px;margin:0 auto;padding:1.5rem 1rem 3rem}main>section{margin-bottom:3rem;scroll-margin-top:4rem}.theme-toggle{position:absolute;top:50%;right:1.25rem;transform:translateY(-50%);background:var(--bg-page);border:1px solid var(--border-subtle);border-radius:8px;padding:.5rem;cursor:pointer;color:var(--text-secondary);display:flex;align-items:center;justify-content:center;transition:color .15s,border-color .15s,background .15s}.theme-toggle:hover{color:var(--text-primary);border-color:var(--text-secondary)}.icon-sun{display:none}.icon-moon{display:block}:root[data-theme=dark] .icon-sun{display:block}:root[data-theme=dark] .icon-moon{display:none}@media(prefers-color-scheme:dark){:root:not([data-theme=light]) .icon-sun{display:block}:root:not([data-theme=light]) .icon-moon{display:none}}@media(max-width:768px){header{padding:1rem 1rem 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