body {
    font-family: 'Roboto', sans-serif;
    padding: 2rem;
}

.day-buttons {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
}

button {
    background-color: #1976d2;
    /* Material blue */
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.6rem 1.2rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    margin: 0.25rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
    transition: background-color 0.2s ease, transform 0.1s ease;
}

button:hover {
    background-color: #1565c0;
}

button:active {
    transform: scale(0.97);
}

button:disabled {
    background-color: #ccc;
    color: #666;
    cursor: not-allowed;
    box-shadow: none;
}

#result {
    margin-top: 1rem;
    font-weight: bold;
}

#timeTaken {
    font-style: italic;
    color: gray;
}

#nextBtn {
    display: none;
    margin-top: 1rem;
}

@media (max-width: 768px) {
    .day-buttons {
        flex-direction: column;
    }

    button {
        padding: 1.4rem 1.2rem;
    }
}