body {
    font-family: Arial, sans-serif;
    background-color: #f4f7fa;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 700px;
    margin: 50px auto;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0px 3px 12px rgba(0,0,0,0.15);
    text-align: center;
}

h1 {
    color: #2563eb;
}

input {
    width: 80%;
    padding: 12px;
    margin: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
}

button {
    background-color: #2563eb;
    color: white;
    border: none;
    padding: 12px 18px;
    margin: 8px;
    border-radius: 6px;
    cursor: pointer;
}

button:hover {
    background-color: #1d4ed8;
}

#timer {
    font-size: 48px;
    font-weight: bold;
    margin: 20px;
    color: #111827;
}

#goalDisplay {
    color: green;
    font-weight: bold;
}