:root{--bg:#0a0a0a;--panel:#111;--panel-muted:#161616;--border:#262626;--text:#f5f5f5;--muted:#a3a3a3;--accent:#0070f3;--error:#f87171;--success:#34d399;--track:#ffffff14;--shadow-sm:0 1px 2px #0006;--shadow-md:0 6px 20px #00000059;color:var(--text);background:var(--bg);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;font:16px/1.5 Inter,system-ui,-apple-system,sans-serif}*{box-sizing:border-box}body{margin:0}#root{max-width:1100px;min-height:100vh;margin:0 auto}h1,h2{margin:0 0 12px;font-weight:700}h1{font-size:40px}h2{font-size:22px}p{margin:0}@media (width<=720px){h1{font-size:32px}}.page{flex-direction:column;gap:32px;padding:48px 24px 64px;display:flex}.header{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:24px;display:flex}.eyebrow{text-transform:uppercase;letter-spacing:.16em;color:var(--muted);margin:0 0 8px;font-size:12px;font-weight:600}.lead{color:var(--muted);max-width:640px;margin:0}.card{border:1px solid var(--border);background:var(--panel);box-shadow:var(--shadow-sm);text-align:left;border-radius:12px;padding:24px}.info{background:var(--panel-muted)}.form{flex-direction:column;gap:16px;margin-top:16px;display:flex}.field{color:var(--text);flex-direction:column;gap:8px;font-weight:500;display:flex}input,select{border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:8px;padding:10px 12px;font-size:16px}input:focus,select:focus{outline:2px solid color-mix(in srgb, var(--accent) 70%, transparent);outline-offset:1px}.grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;display:grid}.form .field+.field{margin-top:4px}.actions{flex-wrap:wrap;gap:12px;display:flex}button{background:var(--accent);color:#fff;cursor:pointer;border:1px solid #0000;border-radius:8px;padding:10px 18px;font-weight:600;transition:background-color .2s,box-shadow .2s,border-color .2s}button:disabled{opacity:.6;cursor:not-allowed;box-shadow:none}button:hover:not(:disabled){background:color-mix(in srgb, var(--accent) 85%, #fff 15%);box-shadow:var(--shadow-md)}button.secondary{color:var(--text);border:1px solid var(--border);background:0 0}.muted{color:var(--muted);margin:0}.helper{color:var(--muted);margin-top:16px}.error{color:var(--error);margin:0;font-weight:600}.success{color:var(--success);margin:0;font-weight:600}.user-card{border:1px solid var(--border);background:var(--panel);border-radius:10px;flex-direction:column;gap:8px;min-width:220px;padding:16px;display:flex}.user-email{color:var(--text);margin:0;font-weight:600}.section-header{justify-content:space-between;align-items:center;gap:16px;display:flex}.pill{background:var(--panel-muted);color:var(--text);border:1px solid var(--border);border-radius:999px;justify-content:center;align-items:center;padding:6px 12px;font-size:12px;font-weight:600;display:inline-flex}.score-list{flex-direction:column;gap:12px;margin-top:16px;display:flex}.score-item{background:var(--panel-muted);border:1px solid var(--border);border-radius:10px;justify-content:space-between;align-items:center;gap:16px;padding:12px 16px;display:flex}.score-course{color:var(--text);margin:0 0 4px;font-weight:600}.score-meta{gap:8px;display:flex}.header-actions{flex-direction:column;align-items:flex-end;gap:16px;display:flex}.nav{border:1px solid var(--border);background:var(--panel);border-radius:10px;gap:8px;padding:4px;display:flex}.nav-button{color:var(--text);cursor:pointer;background:0 0;border:none;border-radius:8px;padding:8px 16px;font-weight:600}.nav-button.active{background:var(--accent);color:#fff}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-top:16px;display:grid}.stats-card{border:1px solid var(--border);background:var(--panel-muted);border-radius:10px;margin-top:16px;padding:16px}.bar-track{background:var(--track);border-radius:999px;height:10px;overflow:hidden}.grade-count{text-align:right;font-weight:600}.summary-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.summary-label{color:var(--muted);font-size:12px;display:block}.summary-value{color:var(--text);font-size:18px;font-weight:700}.histogram{grid-template-columns:repeat(21,1fr);align-items:flex-end;gap:4px;height:160px;margin-top:12px;display:grid}.histogram-bar{align-items:flex-end;height:100%;display:flex}.histogram-fill{border-radius:6px 6px 0 0;width:100%;min-height:4px}.button-lg{padding:12px 20px;font-size:17px}@media (width<=720px){.page{padding:32px 16px 48px}.header-actions{align-items:flex-start}.nav{justify-content:space-between;width:100%}.grade-bar{grid-template-columns:32px 1fr 32px}}