.greeter-container {
    position: relative;
    height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1000px;
}

.floating-math {
    position: absolute;
    opacity: 0.4;
    font-size: 1.2rem;
    animation: float 8s ease-in-out infinite;
    color: #64748b;
    font-family: 'Courier New', Courier, monospace;
}

.floating-math:nth-child(1) { top: 10%; left: 10%; animation-delay: 0s; }
.floating-math:nth-child(2) { top: 20%; right: 15%; animation-delay: -2s; }
.floating-math:nth-child(3) { bottom: 30%; left: 5%; animation-delay: -4s; }
.floating-math:nth-child(4) { bottom: 15%; right: 10%; animation-delay: -6s; }
.floating-math:nth-child(5) { top: 50%; left: 3%; animation-delay: -1s; }
.floating-math:nth-child(6) { top: 60%; right: 5%; animation-delay: -3s; }

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); opacity: 0.3; }
    25% { transform: translateY(-20px) rotate(2deg); opacity: 0.5; }
    50% { transform: translateY(-10px) rotate(-1deg); opacity: 0.4; }
    75% { transform: translateY(-15px) rotate(1deg); opacity: 0.3; }
}

.greeter {
    text-align: center;
    z-index: 10;
    max-width: 800px;
    padding: 2rem;
}

.greeter .title {
    font-size: 4rem;
    font-weight: bold;
    margin-bottom: 1rem;
    font-family: 'Courier New', Courier, monospace;
    background: linear-gradient(45deg, #3b82f6, #8b5cf6, #06b6d4);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 4s ease-in-out infinite;
    text-shadow: 0 0 30px rgba(59, 130, 246, 0.3);
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.greeter:not(:first-child) {
    font-size: 1.3rem;
    color: #475569;
    margin-bottom: 2rem;
    opacity: 0;
    animation: fade-in 2s ease-out 0.5s forwards;
}

@keyframes fade-in {
    to { opacity: 1; }
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: #3b82f6;
    border-radius: 50%;
    animation: particle-float 15s linear infinite;
    opacity: 0.6;
}

@keyframes particle-float {
    0% {
        transform: translateY(100vh) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-10vh) translateX(50px);
        opacity: 0;
    }
}