@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap";:root{--primary:#6366f1;--primary-hover:#4f46e5;--secondary:#ec4899;--background:#0f172a;--surface:#1e293bb3;--surface-border:#ffffff1a;--text-primary:#f8fafc;--text-secondary:#94a3b8;--success:#10b981;--danger:#ef4444;--warning:#f59e0b}*{box-sizing:border-box;margin:0;padding:0}body{color:var(--text-primary);background:radial-gradient(circle at 0 0,#1e1b4b,#0f172a);min-height:100vh;font-family:Inter,sans-serif;overflow-x:hidden}.glass-panel{background:var(--surface);-webkit-backdrop-filter:blur(12px);border:1px solid var(--surface-border);border-radius:16px;box-shadow:0 4px 30px #0000004d}.glass-card{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff08;border:1px solid #ffffff0d;border-radius:12px;transition:transform .3s,box-shadow .3s}.glass-card:hover{border-color:#ffffff26;transform:translateY(-5px);box-shadow:0 10px 40px #0006}h1,h2,h3,h4{letter-spacing:-.02em;font-weight:700}.text-gradient{background:linear-gradient(135deg, var(--primary), var(--secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text}.btn{cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary{background:linear-gradient(135deg, var(--primary), #818cf8);color:#fff;box-shadow:0 4px 15px #6366f166}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #6366f199}.btn-secondary{color:var(--text-primary);background:#ffffff1a;border:1px solid #fff3}.btn-secondary:hover{background:#ffffff26}.input-field{border:1px solid var(--surface-border);width:100%;color:var(--text-primary);background:#0f172a99;border-radius:8px;outline:none;padding:.75rem 1rem;transition:border-color .2s,box-shadow .2s}.input-field:focus{border-color:var(--primary);box-shadow:0 0 0 3px #6366f133}.flashcard-container{perspective:1000px;width:100%;max-width:600px;height:400px;margin:0 auto}.flashcard{width:100%;height:100%;transform-style:preserve-3d;cursor:pointer;transition:transform .6s;position:relative}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden;text-align:center;justify-content:center;align-items:center;width:100%;height:100%;padding:2rem;font-size:1.5rem;display:flex;position:absolute}.flashcard-front{background:linear-gradient(135deg,#1e293b,#0f172a)}.flashcard-back{background:linear-gradient(135deg,#0f172a,#1e1b4b);transform:rotateY(180deg)}.container{max-width:1200px;margin:0 auto;padding:2rem}.grid{gap:1.5rem;display:grid}.grid-cols-1{grid-template-columns:repeat(1,1fr)}@media (width>=768px){.grid-cols-2{grid-template-columns:repeat(2,1fr)}.grid-cols-3{grid-template-columns:repeat(3,1fr)}}.navbar{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--surface-border);z-index:50;background:#0f172acc;justify-content:space-between;align-items:center;padding:1.5rem 2rem;display:flex;position:sticky;top:0}.nav-links{gap:1.5rem;display:flex}.nav-link{color:var(--text-secondary);font-weight:500;text-decoration:none;transition:color .2s}.nav-link:hover,.nav-link.active{color:var(--text-primary)}