:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#eef0f7;--panel:#fbfbff;--ink:#1f2433;--muted:#61697f;--line:#c8cede;--accent:#2457b8;--accent-2:#183d80}*{box-sizing:border-box}body{background:radial-gradient(circle at 20% 10%, #2457b826, transparent 28%), radial-gradient(circle at 78% 18%, #5581d629, transparent 30%), linear-gradient(180deg, #f5f6fb 0%, var(--bg) 100%);color:var(--ink);margin:0;font-family:IBM Plex Sans,Avenir Next,sans-serif}#root{place-items:center;min-height:100vh;padding:24px;display:grid}.flashcards-shell{background:color-mix(in srgb, var(--panel) 95%, white);border:1px solid var(--line);border-radius:24px;width:min(860px,100%);padding:22px;box-shadow:0 18px 44px #1f24331f}.flashcards-header h1{letter-spacing:-.05em;margin:0;font-size:clamp(1.8rem,1.3rem + 1.1vw,2.4rem)}.eyebrow{color:var(--accent);letter-spacing:.08em;text-transform:uppercase;margin:0 0 6px;font-size:.82rem;font-weight:700}.subtitle{color:var(--muted);max-width:62ch;margin:8px 0 0}button{border:1px solid var(--line);color:var(--ink);cursor:pointer;font:inherit;background:#fff;border-radius:12px}.topic-strip{flex-wrap:wrap;gap:10px;margin:20px 0 16px;display:flex}.topic-chip{padding:8px 12px;font-weight:700}.topic-chip[data-active=true]{background:var(--accent);border-color:var(--accent);color:#fff}.deck-meta{flex-wrap:wrap;gap:10px;margin-bottom:14px;display:flex}.pill{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px;font-weight:600}.pill.muted{color:var(--muted)}.flashcard{border:1px solid var(--line);background:linear-gradient(135deg,#2457b814,#0000 40%),linear-gradient(#fffefe,#f7f8fc);border-radius:20px;min-height:360px;padding:26px}.flashcard.empty{min-height:180px}.card-label{color:var(--accent);letter-spacing:.06em;text-transform:uppercase;margin:0 0 10px;font-size:.82rem;font-weight:700}.flashcard h2{margin:0;font-size:clamp(1.4rem,1.15rem + .8vw,2rem);line-height:1.2}.hint{color:var(--muted);margin:20px 0 0}.answer-block{gap:16px;margin-top:22px;display:grid}.answer-block p{margin:0;line-height:1.6}.reference-list{gap:10px;display:grid}.reference-link{border:1px solid var(--line);color:inherit;background:#fff;border-radius:14px;align-items:center;gap:10px;padding:12px 14px;text-decoration:none;display:flex}.reference-link:hover{border-color:var(--accent)}.kind-badge{min-width:72px;color:var(--accent-2);text-transform:uppercase;text-align:center;background:#edf2ff;border-radius:999px;padding:5px 9px;font-size:.78rem;font-weight:700}.deck-controls{justify-content:space-between;gap:10px;margin-top:16px;display:flex}.deck-controls button{min-width:140px;padding:10px 14px;font-weight:700}.deck-controls .primary{background:var(--accent);border-color:var(--accent);color:#fff}.flashcards-banner{border:1px solid var(--line);background:#fff;border-radius:14px;margin:14px 0 0;padding:12px 14px}.flashcards-banner.error{color:#a4322c;background:#fff4f1}@media (width<=640px){.flashcards-shell{padding:18px}.deck-controls{flex-direction:column}.deck-controls button{width:100%}}