:root{--bg: #ffffff;--panel: #ffffff;--text: #111827;--muted: #6b7280;--accent: #5ac8fa;--accent2: #34d399;--border: #e5e7eb;--row: #f9fafb}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:system-ui,sans-serif}.container{max-width:1200px;margin:0 auto;padding:24px}.header{margin-bottom:12px}.title{font-size:28px;font-weight:700}.subtle{color:var(--muted);font-size:14px}.panel{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:12px}.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}.tab{padding:6px 14px;border-radius:999px;border:1px solid var(--border);background:#f9fafb;color:var(--muted);cursor:pointer;font-weight:600}.tab-active{background:var(--text);color:#fff;border-color:var(--text)}.controls{display:grid;grid-template-columns:1fr repeat(3,160px);gap:8px;align-items:center;margin-bottom:12px}.input,.select,.btn{padding:8px 10px;border-radius:8px;border:1px solid var(--border);background:#fff;color:var(--text)}.btn{cursor:pointer}.table{width:100%;border-collapse:separate;border-spacing:0}th,td{padding:10px 8px;border-bottom:1px solid var(--border);text-align:left}th{position:sticky;top:0;background:var(--panel);color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em}tr:hover td{background:var(--row)}.badge{display:inline-block;padding:2px 8px;border:1px solid var(--border);border-radius:999px;font-size:12px;color:var(--muted);background:#f3f4f6}.progress{height:8px;width:120px;background:#f3f4f6;border:1px solid var(--border);border-radius:999px;overflow:hidden}.progress-inner{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2))}.row-toggle{background:none;border:none;color:var(--accent);cursor:pointer}.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.metric{background:#fff;border:1px solid var(--border);border-radius:10px;padding:10px}.metric .label{color:var(--muted);font-size:12px}.metric .value{font-size:18px;font-weight:700}.chips{display:flex;gap:6px;flex-wrap:wrap}.chip{font-size:12px;padding:4px 8px;background:#f3f4f6;border:1px solid var(--border);border-radius:999px}.grid{display:grid;gap:8px}.grid.cols-4{grid-template-columns:repeat(4,1fr)}.mol{display:block;width:100%;border:1px solid var(--border);border-radius:8px;background:#fff}.footer{margin-top:12px;display:flex;justify-content:space-between;color:var(--muted);font-size:12px}.kbd{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace;background:#f3f4f6;border:1px solid var(--border);padding:1px 6px;border-radius:4px;font-size:12px}.quiz-score{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:8px}.quiz-score .label{display:block;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.quiz-score .value{display:block;font-size:18px;font-weight:600;color:var(--text)}.quiz-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:16px auto;width:100%;max-width:840px}.quiz-option{border:2px solid transparent;border-radius:16px;padding:6px;background:#f9fafb;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,border-color .15s;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;width:100%;overflow:hidden}.quiz-option:disabled{cursor:default;opacity:.9}.quiz-option:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 16px #0f172a26}.quiz-option-correct{border-color:var(--accent2);box-shadow:0 0 0 3px #34d39940}.quiz-option-incorrect{border-color:#f87171;box-shadow:0 0 0 3px #f8717140}.quiz-status{margin-top:8px;padding:10px 12px;border-radius:10px;font-weight:600}.quiz-status.correct{background:#34d3991a;color:#065f46}.quiz-status.incorrect{background:#f871711f;color:#7f1d1d}.quiz-chems{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:16px}.quiz-chemist-card{border:1px solid var(--border);border-radius:12px;padding:12px;background:#fdfdfd}.quiz-chemist-name{font-size:18px;font-weight:600;margin-bottom:6px}.quiz-chemist-card dl{margin:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;font-size:12px}.quiz-chemist-card dt{color:var(--muted);font-weight:500}.quiz-chemist-card dd{margin:0;font-weight:600}@media (max-width: 720px){.quiz-grid{grid-template-columns:1fr;max-width:420px}}.quiz-actions{margin-top:12px;display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}.share-bar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;padding-left:6px}.share-label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-weight:600}.share-button{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;border:1px solid var(--border);background:#fff;color:var(--text);cursor:pointer;padding:0}.share-button:hover{box-shadow:0 4px 12px #0f172a1f;transform:translateY(-1px)}.share-button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.share-button-linkedin{background:#0a66c2;border-color:#0a66c2}.share-button-x{background:#fff}.share-icon{width:18px;height:18px;display:block}.share-status{font-size:12px;color:var(--muted)}.share-status.copied{color:#047857}.share-status.error{color:#b91c1c}