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3rem}*{box-sizing:border-box}html,body{margin:0;min-width:320px;background:var(--bg);color:var(--text);overflow-x:hidden}body{min-height:100vh;line-height:1.5}img,video{display:block;max-width:100%}a,button,input,select,progress{font:inherit}button,a.primary-button,a.secondary-button,.menu-toggle{cursor:pointer}.site-shell{min-height:100vh;display:flex;flex-direction:column}.container{width:min(100%,var(--container));margin:0 auto;padding-inline:var(--space-3)}.site-header,.site-footer{background:var(--surface)}.site-header{border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}.site-footer{margin-top:auto;border-top:1px solid var(--border)}.topbar{display:grid;grid-template-columns:1fr 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