:root{--cobalt:#1F3BFF;--ink:#12143A;--paper:#F3F4FB;--coral:#FF5A3C;--mint:#19C37D;--line:#E1E3F2;--muted:#5B5F86;--white:#fff;--danger:#B23A22;--sab:env(safe-area-inset-bottom,0px);--sat:env(safe-area-inset-top,0px);--nav-h:64px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html{-webkit-text-size-adjust:100%}body,html{margin:0;background:var(--paper);color:var(--ink);font:16px/1.5 Space Grotesk,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;overscroll-behavior-y:none}body{min-height:100dvh}a{color:var(--cobalt)}button,input,select,textarea{font:inherit;color:inherit}h1,h2,h3{letter-spacing:-.02em;line-height:1.1;margin:0}p{margin:0}.shell{max-width:640px;margin:0 auto;min-height:100dvh;flex-direction:column}.shell,.top{display:flex}.top{position:-webkit-sticky;position:sticky;top:0;z-index:5;background:rgba(243,244,251,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);padding:calc(12px + var(--sat)) 16px 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