@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Outfit:wght@500;600;700;800&display=swap";:root{--bg-dark:#0f172a;--bg-card:#1e293b;--bg-card-hover:#334155;--text-primary:#f8fafc;--text-secondary:#94a3b8;--accent-primary:#3b82f6;--accent-secondary:#8b5cf6;--success:#10b981;--error:#ef4444;--border-color:#ffffff1a;--glass-bg:#1e293bb3;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--shadow-glow:0 0 15px #3b82f680;--radius-md:.5rem;--radius-lg:.75rem;--radius-xl:1rem}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-dark);color:var(--text-primary);min-height:100vh;font-family:Inter,sans-serif;line-height:1.5}h1,h2,h3,h4,h5,h6{font-family:Outfit,sans-serif}a{color:inherit;text-decoration:none}.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.glass-panel{background:var(--glass-bg);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:var(--radius-xl)}.gradient-text{background:linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.btn{border-radius:var(--radius-md);cursor:pointer;border:none;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-family:Inter,sans-serif;font-size:1rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary{background:linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));color:#fff;box-shadow:0 4px 14px #6366f163}.btn-primary:hover{box-shadow:var(--shadow-glow);transform:translateY(-2px)}.btn-secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{background:var(--bg-card-hover);transform:translateY(-2px)}.btn-outline{color:var(--accent-primary);border:2px solid var(--accent-primary);background:0 0}.btn-outline:hover{background:#3b82f61a}.app-header{border-bottom:1px solid var(--border-color);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:50;background:#0f172ae6;margin-bottom:2rem;padding:1.5rem 0;position:sticky;top:0}.app-header .container{justify-content:space-between;align-items:center;display:flex}.logo{align-items:center;gap:.5rem;font-size:1.5rem;font-weight:800;display:flex}.nav-links{gap:1.5rem;display:flex}.nav-link{color:var(--text-secondary);font-weight:500;transition:color .2s}.nav-link:hover,.nav-link.active{color:var(--text-primary)}.grid{gap:1.5rem;display:grid}.grid-cols-2{grid-template-columns:repeat(2,1fr)}.grid-cols-3{grid-template-columns:repeat(3,1fr)}@media (width<=768px){.grid-cols-2,.grid-cols-3{grid-template-columns:1fr}}.card{background:var(--bg-card);border-radius:var(--radius-xl);border:1px solid var(--border-color);padding:1.5rem;transition:transform .2s,box-shadow .2s}.card-hover:hover{box-shadow:var(--shadow-lg);border-color:#fff3;transform:translateY(-4px)}.badge{text-transform:uppercase;letter-spacing:.05em;border-radius:9999px;padding:.25rem .75rem;font-size:.75rem;font-weight:600;display:inline-block}.badge-pyq{color:#facc15;background:#eab30833;border:1px solid #eab3084d}.badge-sim{color:#60a5fa;background:#3b82f633;border:1px solid #3b82f64d}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:.4s ease-out forwards fadeIn}.option-label{border:1px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;background:#ffffff08;align-items:center;margin-bottom:.75rem;padding:1rem;transition:all .2s;display:flex}.option-label:hover{background:#ffffff14}.option-label.selected{border-color:var(--accent-primary);background:#3b82f61a}.option-label.correct{border-color:var(--success);background:#10b9811a}.option-label.incorrect{border-color:var(--error);background:#ef44441a}.option-input{accent-color:var(--accent-primary);width:1.25rem;height:1.25rem;margin-right:1rem}.katex-html{display:none!important}.katex-mathml{display:inline-block!important}.katex-mathml math{max-width:100%;display:inline-block;overflow:visible}.katex-mathml mtd{padding:.3em .6em!important}.google-anno,ins.adsbygoogle{display:none!important}.card{max-width:100%;overflow-x:auto}.katex-display{overflow:auto hidden}.question_text{max-width:100%;overflow-x:auto}