:root{--bg-dark:#0b0f19;--bg-gradient-1:#7c3aed26;--bg-gradient-2:#38bdf826;--panel-bg:#1e293b99;--border-light:#ffffff14;--border-glow:#38bdf84d;--text-primary:#f8fafc;--text-secondary:#94a3b8;--accent:#38bdf8;--accent-hover:#0284c7;--gold:#fbbf24;--correct-bg:#10b98126;--correct-border:#10b981;--incorrect-bg:#ef444426;--incorrect-border:#ef4444;--item-bg:#ffffff08;--item-hover-bg:#ffffff14;--btn-disabled-bg:#ffffff1a;--insight-btn-bg:#7c3aed33;--insight-btn-border:#7c3aed66;--insight-btn-text:#e9d5ff}[data-theme=light]{--bg-dark:#f1f5f9;--bg-gradient-1:#7c3aed14;--bg-gradient-2:#38bdf814;--panel-bg:#fffc;--border-light:#00000014;--border-glow:#38bdf899;--text-primary:#0f172a;--text-secondary:#475569;--accent:#0284c7;--accent-hover:#0369a1;--gold:#d97706;--correct-bg:#10b98126;--correct-border:#059669;--incorrect-bg:#ef444426;--incorrect-border:#dc2626;--item-bg:#00000005;--item-hover-bg:#0000000d;--btn-disabled-bg:#0000000d;--insight-btn-bg:#7c3aed1a;--insight-btn-border:#7c3aed4d;--insight-btn-text:#581c87}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-dark);background-image:radial-gradient(circle at 15% 50%, var(--bg-gradient-1), transparent 25%), radial-gradient(circle at 85% 30%, var(--bg-gradient-2), transparent 25%);color:var(--text-primary);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:Outfit,sans-serif}.glass{background:var(--panel-bg);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-light);border-radius:16px;transition:all .3s;box-shadow:0 8px 32px #0000005e}.glass:hover{border-color:var(--border-glow)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:.5s forwards fadeIn}button{cursor:pointer;border:none;outline:none;font-family:inherit}.app-container{flex-direction:column;gap:2rem;max-width:1000px;min-height:100vh;margin:0 auto;padding:2rem;display:flex}.header{text-align:center;flex-direction:column;align-items:center;gap:.5rem;padding:2rem;display:flex}.header h1{background:linear-gradient(90deg,#38bdf8,#818cf8);-webkit-text-fill-color:transparent;letter-spacing:-.02em;-webkit-background-clip:text;font-size:2.5rem;font-weight:800}.header p{color:var(--text-secondary);font-size:1.1rem}.controls{border-radius:99px;justify-content:space-between;align-items:center;margin-bottom:1rem;padding:1rem 2rem;display:flex}.search-input{color:var(--text-primary);background:0 0;border:none;outline:none;width:300px;font-size:1rem}.search-input::placeholder{color:var(--text-secondary)}.question-list{flex-direction:column;gap:1.5rem;display:flex}.question-card{flex-direction:column;gap:1.5rem;padding:2rem;display:flex}.question-header{border-bottom:1px solid var(--border-light);justify-content:space-between;align-items:center;padding-bottom:1rem;display:flex}.question-id{color:var(--accent);font-size:1.2rem;font-weight:800}.question-type{background:var(--item-hover-bg);text-transform:uppercase;letter-spacing:.05em;color:var(--gold);border-radius:99px;padding:.2rem .8rem;font-size:.8rem}.question-title{font-size:1.15rem;font-weight:500;line-height:1.6}.options-list{flex-direction:column;gap:.8rem;display:flex}.option-item{background:var(--item-bg);border:1px solid var(--border-light);border-radius:12px;align-items:center;gap:1rem;padding:1rem 1.5rem;transition:all .2s;display:flex}.option-item.clickable{cursor:pointer}.option-item.non-clickable{cursor:default}.option-item.clickable:hover{background:var(--item-hover-bg)}.option-item.selected{background:#38bdf826;border-color:#38bdf866}.option-item.correct-revealed{background:var(--correct-bg);border-color:var(--correct-border)}.option-item.incorrect-revealed{background:var(--incorrect-bg);border-color:var(--incorrect-border)}.option-checkbox{cursor:pointer;accent-color:var(--accent);margin-right:.5rem;transform:scale(1.2)}.actions{justify-content:flex-end;margin-top:1rem;display:flex}.reveal-btn{background:linear-gradient(135deg, var(--accent), var(--accent-hover));color:#fff;border-radius:99px;padding:.8rem 1.5rem;font-size:.95rem;font-weight:600;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 15px #38bdf84d}.reveal-btn:disabled{background:var(--btn-disabled-bg);color:var(--text-secondary);box-shadow:none;cursor:default}.reveal-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #38bdf866}.insight-btn{background:var(--insight-btn-bg);border:1px solid var(--insight-btn-border);color:var(--insight-btn-text);border-radius:99px;padding:.8rem 1.5rem;font-size:.95rem;font-weight:600;transition:all .2s}.insight-btn:hover:not(:disabled){background:#7c3aed66;border-color:#c084fc;box-shadow:0 4px 15px #7c3aed4d}.insight-btn:disabled{opacity:.5;cursor:wait}.explanation-box{background:var(--item-bg);border-left:3px solid #a855f7;border-radius:8px;margin-top:1rem;padding:1.2rem;font-size:.95rem;line-height:1.6;animation:.4s fadeIn}.explanation-box strong{color:#c084fc;margin-bottom:.5rem;display:block}.pagination{justify-content:center;align-items:center;gap:1rem;margin-top:2rem;padding:1rem;display:flex}.page-btn{background:var(--item-hover-bg);color:var(--text-primary);border:1px solid var(--border-light);border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;transition:all .2s;display:flex}.page-btn:hover:not(:disabled){background:var(--accent);border-color:var(--accent)}.page-btn:disabled{opacity:.5;cursor:not-allowed}.page-info{color:var(--text-secondary);font-weight:500}.loader-container{flex-direction:column;justify-content:center;align-items:center;gap:1rem;height:60vh;display:flex}.spinner{border:4px solid #ffffff1a;border-left-color:var(--accent);border-radius:50%;width:50px;height:50px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}