@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;900&display=swap');

* {
    font-family: 'Inter', sans-serif;
}

.fib-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 3.5rem;
    padding: 0.75rem 1.25rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: #93c5fd;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(37, 99, 235, 0.08));
    border: 1px solid rgba(96, 165, 250, 0.2);
    border-radius: 1rem;
    backdrop-filter: blur(8px);
    text-shadow: 0 0 20px rgba(96, 165, 250, 0.4);
    box-shadow:
        0 0 15px rgba(59, 130, 246, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeSlideIn 0.6s ease-out both;
    animation-delay: calc(var(--i) * 0.07s);
}

.fib-number:hover {
    color: #bfdbfe;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.3), rgba(37, 99, 235, 0.18));
    border-color: rgba(96, 165, 250, 0.45);
    box-shadow:
        0 0 30px rgba(59, 130, 246, 0.25),
        0 8px 32px rgba(59, 130, 246, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transform: translateY(-4px) scale(1.05);
    text-shadow: 0 0 30px rgba(96, 165, 250, 0.7);
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}