body { 
    background: radial-gradient(circle at center, #0f172a 0%, #020617 100%); 
    color: #f8fafc; 
    font-family: 'Inter', sans-serif; 
    overflow: hidden; 
    height: 100vh; 
}

#canvas-particles { 
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; opacity: 0.9; 
}

.glass-card { 
    background: rgba(15, 23, 42, 0.8); 
    backdrop-filter: blur(25px); 
    border: 1px solid rgba(6, 182, 212, 0.2); 
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.9); 
}

.logo-inner { 
    font-size: 1.8rem; font-weight: 900; letter-spacing: 0.4em; text-transform: uppercase; 
    color: #ffffff; display: block; margin-bottom: 0.25rem; 
    text-shadow: 0 0 20px rgba(6, 182, 212, 0.5); 
}

.input-ia { 
    background: rgba(2, 6, 23, 0.7) !important; 
    border: 1px solid rgba(255, 255, 255, 0.1); 
    transition: all 0.3s ease; 
    color: white !important; width: 100%; padding: 1.1rem; 
    border-radius: 0.75rem; font-size: 0.875rem; margin-top: 1.2rem; 
}

.input-ia:focus { 
    border-color: #06b6d4; box-shadow: 0 0 15px rgba(6, 182, 212, 0.3); outline: none; 
}

.btn-glow { 
    background: #0891b2; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); 
}

.btn-glow:hover { 
    background: #06b6d4; box-shadow: 0 0 30px rgba(6, 182, 212, 0.6); transform: translateY(-2px); 
}

.hidden { display: none; }
.fade-in { animation: fadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1); }
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.question-box { font-size: 1.3rem; font-weight: 600; line-height: 1.4; color: #ffffff; margin-bottom: 2rem; }
.text-shadow-blue { text-shadow: 0 0 15px rgba(6, 182, 212, 0.7); }