:root{--bg: #0f172a;--bg2: #1e293b;--card: #ffffff;--ink: #0f172a;--muted: #64748b;--line: #e2e8f0;--primary: #2563eb;--primary-d: #1d4ed8;--danger: #dc2626;--green: #16a34a;--amber: #d97706;--radius: 16px;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:linear-gradient(160deg,var(--bg),var(--bg2));color:var(--ink)}button{font:inherit;cursor:pointer}code{font-family:ui-monospace,monospace}.page{min-height:100vh;padding:24px}.page.student,.page.instructor,.page.display.center{display:flex;align-items:center;justify-content:center}.card{background:var(--card);border-radius:var(--radius);padding:28px;width:100%;max-width:460px;box-shadow:0 20px 50px #00000059}.card.wide{max-width:560px}h1{font-size:1.5rem;margin:0 0 8px}h2{font-size:1.15rem;margin:0 0 8px}.muted{color:var(--muted)}.small{font-size:.85rem}.big{font-size:2rem;font-weight:700;margin:6px 0}.field{display:flex;flex-direction:column;gap:6px;margin:14px 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.rev-guide{stroke:#16a34a;stroke-width:1.5;stroke-dasharray:3 3}.demand-svg .rev-dot{fill:#16a34a;stroke:#fff;stroke-width:2}.demand-svg .prof-guide{stroke:#7c3aed;stroke-width:1.5;stroke-dasharray:3 3}.demand-svg .prof-dot{fill:#7c3aed;stroke:#fff;stroke-width:2}.demand-svg .demand-path{stroke-dasharray:1;stroke-dashoffset:1;animation:draw 1.6s ease-out forwards}@keyframes draw{to{stroke-dashoffset:0}}.demand-svg .demand-dot{opacity:0;transform-box:fill-box;transform-origin:center;animation:dotIn .3s ease-out forwards}@keyframes dotIn{0%{opacity:0;transform:scale(0)}to{opacity:1;transform:scale(1)}}.demand-svg .late{opacity:0;animation:fadeIn .5s ease-out forwards;animation-delay:1.5s}@keyframes fadeIn{to{opacity:1}}.demand-legend{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:12px}.legend-item{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:#e2e8f0}.legend-swatch{display:inline-block;flex:0 0 auto}@media (max-width: 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