body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background: #f0f0f0;
    font-family: Arial, sans-serif;
}

.shine-btn {
    padding: 20px 40px;
    background: linear-gradient(135deg, #6e8efb, #a777e3);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.shine-btn::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent,
        rgba(255,255,255,0.3),
        transparent
    );
    transform: rotate(45deg);
    transition: 0.5s;
}

.shine-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
}

.shine-btn:hover::before {
    animation: shine 0.75s;
}

@keyframes shine {
    0% {
        transform: rotate(45deg) translateX(-200%);
    }
    100% {
        transform: rotate(45deg) translateX(200%);
    }
}

@media (max-width: 480px) {
    .shine-btn {
        padding: 15px 30px;
        font-size: 16px;
    }
}