body {
    font-family: 'Inter', sans-serif;
    background-color: #f5f5f4; /* stone-100 */
    color: #292524; /* stone-800 */
}
.nav-link {
    transition: color 0.3s, border-color 0.3s;
}
.nav-link:hover {
    color: #0d9488; /* teal-600 */
}
.active-tab {
    border-color: #0d9488; /* teal-600 */
    color: #0d9488;
    font-weight: 500;
}
.diagram-box {
    border: 2px solid #a8a29e; /* stone-400 */
    border-radius: 0.5rem;
    padding: 1rem;
    text-align: center;
    transition: all 0.3s ease-in-out;
}
.diagram-line {
    position: absolute;
    background-color: #a8a29e; /* stone-400 */
    transform-origin: left center;
}
.request-packet {
    position: absolute;
    width: 2rem;
    height: 2rem;
    background-color: #14b8a6; /* teal-500 */
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.75rem;
    transition: all 1.5s ease-in-out;
    opacity: 0;
    z-index: 10;
}
.processing {
    animation: pulse 1s infinite;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(13, 148, 136, 0.7); }
    50% { box-shadow: 0 0 0 10px rgba(13, 148, 136, 0); }
}