body {
    background: linear-gradient(135deg, #e0eafc, #cfdef3);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
}

.zen-container {
    text-align: center;
    background: rgba(255, 255, 255, 0.4);
    padding: 40px;
    border-radius: 30px;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.timer-circle {
    width: 200px;
    height: 200px;
    border: 8px solid #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px auto;
    font-size: 3rem;
    color: #444;
}

button {
    padding: 10px 20px;
    margin: 5px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    background: #5f7adb;
    color: white;
    transition: 0.3s;
}

button:hover {
    background: #3f58b5;
}
.sound-control {
    margin-top: 20px;
}

#sound-toggle {
    background: #444;
    font-size: 0.8rem;
}

#sound-toggle:hover {
    background: #222;
}