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216px)}.session-rail{z-index:40;background:var(--surface);border-right:1px solid var(--line);width:min(300px,86vw);box-shadow:var(--shadow);padding:16px;transition:transform .2s;position:fixed;top:0;bottom:0;left:0;transform:translate(-102%)}.session-rail.open{transform:none}.rail-toggle{display:inline-grid}.rail-scrim{z-index:35;background:#0c0e0d73;border:0;display:block;position:fixed;inset:0}.session-delete{opacity:1}}@media (max-width:640px){body{font-size:15px}.topbar{-webkit-backdrop-filter:none;backdrop-filter:none;background:var(--canvas);gap:8px;height:56px;padding:0 16px}.brand-name{display:none}.nav{z-index:30;padding:6px 8px calc(6px + env(safe-area-inset-bottom));background:color-mix(in srgb, var(--surface) 94%, transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-top:1px solid var(--line);justify-content:space-around;margin:0;position:fixed;bottom:0;left:0;right:0}.nav a{flex-direction:column;gap:2px;padding:6px 10px;font-size:11px}.nav 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