body {
    margin: 0;
    font-family: 'Arial', sans-serif;
}

.lock-screen {
    background: url('kaliii.jpg') no-repeat center center/cover;
    height: 100vh;
    width: 100vw;
    position: fixed;
    top: 0;
    left: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.overlay {
    background-color: rgba(255, 255, 255, 0.7);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
}

.overlay input {
    padding: 10px;
    font-size: 16px;
    border-radius: 10px;
    border: none;
    margin-bottom: 10px;
}

.overlay button {
    padding: 10px 20px;
    font-size: 16px;
    background-color: pink;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    color: white;
}

.heart-screen {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #ffe6f0;
    height: 100vh;
    color: #ff1493;
}

.heart {
    width: 300px;
    transition: transform 0.3s ease-in-out;
}

.counter {
    font-size: 24px;
    margin-top: 20px;
}