:root{--bg:#0f172a;--panel:#1e293b;--text:#e2e8f0;--subtext:#94a3b8;--accent:#38bdf8;--correct:#22c55e;--incorrect:#ef4444;--color-A:#ef4444;--color-T:#38bdf8;--color-G:#22c55e;--color-C:#f59e0b}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;padding:2rem 1rem}.view{max-width:960px;width:100%;text-align:center}.hidden{display:none}h1{margin-bottom:.25rem}.subtitle{color:var(--subtext);margin-top:0;margin-bottom:1.5rem}.eyebrow{color:var(--accent);text-transform:uppercase;letter-spacing:.08em;font-size:.8rem;font-weight:700;margin:0 0 .5rem}.intro-text{color:var(--text);font-size:1.05rem;line-height:1.6;text-align:left;background:var(--panel);border-radius:10px;padding:1.25rem 1.5rem;margin-bottom:1.75rem}.base{display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-family:"SF Mono",Consolas,Menlo,monospace;color:#0f172a;border-radius:4px}.base-A{background:var(--color-A)}.base-T{background:var(--color-T)}.base-G{background:var(--color-G)}.base-C{background:var(--color-C)}.genome-strip{display:flex;flex-wrap:wrap;gap:3px;justify-content:center;margin-bottom:1.5rem}.genome-strip .base{width:42px;height:54px;font-size:1.4rem}.legend{display:flex;gap:1.25rem;justify-content:center;flex-wrap:wrap;margin-bottom:2rem;color:var(--subtext);font-size:.9rem}.legend-item{display:inline-flex;align-items:center;gap:.4rem}.legend-item .base{width:22px;height:22px;font-size:.8rem}.primary-btn{background:var(--accent);color:#0f172a;border:0;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;border-radius:8px;cursor:pointer;transition:transform .1s ease,opacity .1s ease}.primary-btn:hover{opacity:.9}.primary-btn:active{transform:scale(0.97)}.read-tray{min-height:44px;margin-bottom:1rem;display:flex;justify-content:center}.read-pill{display:flex;gap:3px;padding:4px;background:var(--panel);border:2px dashed var(--accent);border-radius:8px;cursor:grab}.read-pill:active{cursor:grabbing}.read-pill.dragging{opacity:.4}.read-pill.locked{cursor:default;border-color:var(--subtext)}.read-pill .base{width:40px;height:46px;font-size:1.2rem}.read-pill.placed{border-style:solid;height:100%;width:100%;align-self:stretch;padding:2px;box-shadow:0 2px 8px rgba(0,0,0,0.4)}.read-pill.placed .base{width:auto;height:100%;flex:1;font-size:1.1rem}.track{display:grid;grid-template-columns:repeat(30,1fr);grid-template-rows:54px;row-gap:8px;column-gap:3px;background:var(--panel);padding:10px;border-radius:10px;margin-bottom:1rem;position:relative}.track-cell{display:flex;align-items:center;justify-content:center;font-family:"SF Mono",Consolas,Menlo,monospace;font-weight:700;font-size:1.1rem;color:var(--subtext);background:rgba(255,255,255,0.04);border-radius:4px}.track-cell.correct-flash{outline:2px solid var(--correct)}.track-cell.incorrect-flash{outline:2px solid var(--incorrect)}.snp-highlight{outline:3px solid #facc15!important;box-shadow:0 0 14px 3px rgba(250,204,21,0.85);z-index:5;position:relative;animation:snp-pulse 1.4s ease-in-out infinite}@keyframes snp-pulse{0%,100%{box-shadow:0 0 6px 2px rgba(250,204,21,0.6)}50%{box-shadow:0 0 18px 6px rgba(250,204,21,1)}}.deletion-highlight{outline:3px dashed var(--incorrect)!important;box-shadow:0 0 14px 3px rgba(239,68,68,0.7);background:rgba(239,68,68,0.15)!important;z-index:5;position:relative;animation:deletion-pulse 1.4s ease-in-out infinite}@keyframes deletion-pulse{0%,100%{box-shadow:0 0 6px 2px rgba(239,68,68,0.5)}50%{box-shadow:0 0 18px 6px rgba(239,68,68,0.9)}}.insight-prompt{text-align:left;background:var(--panel);border-radius:10px;padding:1rem 1.25rem;margin:0 0 1rem}.insight-prompt-label{display:block;font-weight:600;margin-bottom:.5rem}.insight-answer-input{width:100%;resize:vertical;background:var(--bg);color:var(--text);border:1px solid var(--subtext);border-radius:6px;padding:.6rem .75rem;font-family:inherit;font-size:.95rem;margin-bottom:.75rem}.insight-callout{text-align:left;background:var(--panel);border-left:4px solid var(--accent);border-radius:10px;padding:1rem 1.25rem;color:var(--text);line-height:1.6;margin:0 0 1rem}.inline-base{display:inline-flex;width:1.6em;height:1.6em;vertical-align:middle;margin:0 .15em}.feedback{min-height:1.5rem;font-weight:600}.feedback.correct{color:var(--correct)}.feedback.incorrect{color:var(--incorrect)}.controls{display:flex;gap:1rem;justify-content:center;margin-bottom:1rem}.score{color:var(--subtext)}