body {
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(to right, #667eea, #764ba2);
    color: white;
    text-align: center;
    padding-top: 100px;
}

.container {
    background: rgba(0, 0, 0, 0.2);
    padding: 40px;
    border-radius: 15px;
    display: inline-block;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

#clock {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

input[type="time"] {
    font-size: 1.2rem;
    padding: 10px;
    border-radius: 5px;
    border: none;
    margin-right: 10px;
}

button {
    font-size: 1.2rem;
    padding: 10px 20px;
    background-color: #4cd137;
    border: none;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    background-color: #44bd32;
}

#status {
    margin-top: 20px;
    font-size: 1.1rem;
}

#stopBtn {
    background-color: #e84118;
    margin-top: 10px;
}

#stopBtn:hover {
    background-color: #c23616;
}