:root{--background:#fff;--foreground:#171717;--primary:#4361ee;--primary-light:#4895ef;--secondary:#f72585;--accent:#4cc9f0;--success:#4ade80;--warning:#fbbf24;--error:#ef4444;--gray-50:#f9fafb;--gray-100:#f3f4f6;--gray-200:#e5e7eb;--gray-300:#d1d5db;--gray-400:#9ca3af;--gray-500:#6b7280;--gray-600:#4b5563;--gray-700:#374151;--gray-800:#1f2937;--gray-900:#111827;--radius-sm:.25rem;--radius-md:.5rem;--radius-lg:.75rem;--radius-xl:1rem;--shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -1px rgba(0,0,0,.06);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -2px rgba(0,0,0,.05);--shadow-xl:0 20px 25px -5px rgba(0,0,0,.1),0 10px 10px -5px rgba(0,0,0,.04);--transition-base:all .3s ease;--transition-smooth:all .5s cubic-bezier(.4,0,.2,1);--font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--font-mono:"Fira Code","SF Mono","Roboto Mono",monospace}@media 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rotateGlow{to{filter:hue-rotate(360deg)}}:root{--card-bg:#fff;--card-shadow:rgba(0,0,0,.1);--hover-shadow:rgba(0,0,0,.25);--primary-color:#2563eb;--primary-color-dark:#1e40af;--text-color:#333;--radius:16px;--transition-speed:.3s}@media (prefers-color-scheme:dark){:root{--card-bg:#1e1e1e;--card-shadow:rgba(255,255,255,.05);--hover-shadow:rgba(255,255,255,.15);--text-color:#f5f5f5}}.subjects-container{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));place-items:start center;gap:2rem;padding:2rem;display:grid}.subject-card{background:var(--card-bg);border-radius:var(--radius);width:100%;max-width:280px;height:180px;box-shadow:0 6px 18px var(--card-shadow);transition:transform var(--transition-speed)ease,box-shadow var(--transition-speed)ease;cursor:pointer;text-align:center;-webkit-backdrop-filter:blur(4px);flex-direction:column;justify-content:center;align-items:center;display:flex;position:relative;overflow:hidden}.subject-card:hover,.subject-card:focus-within{box-shadow:0 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