body {
    background-color: #fff;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
    animation: changeBg 4s infinite;
}

@keyframes changeBg {
    0% { background-color: red; }
    25% { background-color: blue; }
    50% { background-color: green; }
    75% { background-color: yellow; }
    100% { background-color: purple; }
}

.container {
    display: flex;
    justify-content: space-between;
    width: 80%;
    padding: 20px;
    box-sizing: border-box;
}

.box {
    position: relative;
    margin: 10px;
    text-align: center;
    flex: 1;
}

.box img {
    width: 150px; /* اندازه عکس‌ها */
    height: auto;
    border: 5px solid transparent;
    border-radius: 10px;
}

.border {
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    border-radius: 10px;
    z-index: -1;
    animation: changeBorderColor 1s infinite;
}

@keyframes changeBorderColor {
    0% { background-color: #ff0000; }
    25% { background-color: #00ff00; }
    50% { background-color: #0000ff; }
    75% { background-color: #ffff00; }
    100% { background-color: #ff00ff; }
}

#center-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: black;
    font-size: 2.5rem;
    text-align: center;
}

h1 {
    font-size: 1.2rem;
    margin: 10px 0;
}