*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--color-primary:#12233f;--color-secondary:#0e9384;--color-accent:#e8a33d;--color-background:#f5f7fa;--color-success:#2f9e68;--color-danger:#d64545;--radius-card:16px;--font-heading:"Fraunces", Georgia, serif;--font-body:"Inter", -apple-system, BlinkMacSystemFont, sans-serif;--nhs-blue:var(--color-secondary);--nhs-dark:var(--color-primary);--nhs-light:#e3f4f1;--nhs-mid:#a9d8d0;--accent:var(--color-accent);--white:#fff;--bg:var(--color-background);--surface:#fff;--border:#dde3ea;--text:var(--color-primary);--text-secondary:#4a5a72;--text-muted:#7c8aa0;--green:var(--color-success);--green-light:#e5f5ec;--red:var(--color-danger);--red-light:#fbeaea;--radius:var(--radius-card);--shadow:0 2px 12px #12233f14;--shadow-lg:0 8px 32px #12233f24}body{font-family:var(--font-body);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:600}a{color:inherit;text-decoration:none}.btn-primary{background:var(--color-secondary);color:#fff;cursor:pointer;border:none;border-radius:10px;padding:12px 24px;font-family:inherit;font-size:15px;font-weight:600;transition:background .15s,transform .1s;box-shadow:0 2px 8px #0e938440}.btn-primary:hover{background:var(--color-primary);transform:translateY(-1px)}.btn-outline{color:var(--color-secondary);border:1.5px solid var(--color-secondary);cursor:pointer;background:0 0;border-radius:10px;padding:12px 24px;font-family:inherit;font-size:15px;font-weight:600;transition:all .15s}.btn-outline:hover{background:var(--nhs-light)}.card{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow)}.app-nav{flex-wrap:wrap;row-gap:8px}@media (width<=480px){.nav-username{display:none}}.stats-grid{grid-template-columns:repeat(3,1fr);gap:12px;display:grid}@media (width<=640px){.stats-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=380px){.stats-grid{grid-template-columns:1fr}}.question-bank-layout{align-items:flex-start;gap:1.75rem;display:flex}@media (width<=768px){.question-bank-layout{flex-direction:column}}.category-sidebar{flex-shrink:0;width:230px;position:sticky;top:80px}@media (width<=768px){.category-sidebar{width:100%;position:static}}.results-grid-2col{grid-template-columns:1fr 1fr;gap:12px;display:grid}@media (width<=480px){.results-grid-2col{grid-template-columns:1fr}}