body { font-family: 'Inter', sans-serif; }
.gradient-bg { background: linear-gradient(135deg, #f0f4ff 0%, #dbe4ff 100%); }
.header-scrolled { background-color: rgba(255, 255, 255, 0.95); backdrop-filter: blur(8px); }
.whatsapp-float {
    position: fixed;
    width: 60px; height: 60px;
    bottom: 30px; right: 30px;
    background-color: #25d366;
    border-radius: 50px;
    box-shadow: 2px 2px 15px rgba(0,0,0,0.3);
    z-index: 100;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.3s ease;
    animation: pulse 2s infinite;
}
.whatsapp-float:hover { background-color: #20ba5a; transform: scale(1.1); }
@keyframes pulse {
    0%   { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
    50%  { box-shadow: 0 0 0 15px rgba(37, 211, 102, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}
@media (max-width: 768px) {
    .whatsapp-float { width: 50px; height: 50px; bottom: 20px; right: 20px; }
    .whatsapp-float img { width: 28px; height: 28px; }
}