:root{--navy:#0d1b2a;--navy-2:#111827;--navy-3:#1e293b;--teal:#10b981;--teal-dim:#0e7490;--ink:#e5e7eb;--ink-dim:#9ca3af;--ink-faint:#6b7280;--line:#1e293b;--A:#16a34a;--B:#2563eb;--C:#0e7490;--D:#d97706;--F:#dc2626;--mono:ui-monospace, "JetBrains Mono", "SF Mono", Menlo, monospace;--sans:"Inter", system-ui, -apple-system, "Segoe UI", sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--navy);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;line-height:1.5}a{color:var(--teal);text-decoration:none}a:hover{text-decoration:underline}button{font-family:var(--sans);cursor:pointer;border:none;border-radius:8px;font-weight:600;transition:filter .15s,background .15s,border-color .15s}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--teal);outline-offset:2px}button:disabled{opacity:.55;cursor:not-allowed}.app{flex-direction:column;min-height:100vh;display:flex}.topbar{border-bottom:1px solid 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