body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
    font-size: 16px;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 10px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

header {
    text-align: center;
    margin-bottom: 20px;
    padding: 15px 0;
    background-color: #007bff;
    color: #fff;
}

h1 {
    font-size: 24px;
    margin: 0;
}

main {
    display: block;
}

.content {
    margin-right: 0;
    min-width: auto;
}

.sidebar {
    width: 100%;
    min-width: auto;
}

section {
    margin-bottom: 15px;
    padding: 10px;
    border: 1px solid #e0e0e0;
    border-radius: 5px;
    line-height: 1.5;
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

button {
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
    width: 100%;
    margin-bottom: 10px;
}

button:hover {
    background-color: #0056b3;
}

.progress-bar {
    height: 20px;
    background-color: #e0e0e0;
    border-radius: 10px;
    margin-top: 15px;
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

.progress-bar {
    position: relative;
}

.progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0;
    background-color: #4CAF50;
    transition: width 0.3s ease;
    background-image: linear-gradient(
        45deg,
        rgba(255, 255, 255, 0.15) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 255, 255, 0.15) 50%,
        rgba(255, 255, 255, 0.15) 75%,
        transparent 75%,
        transparent
    );
    background-size: 40px 40px;
    animation: stripes 1s linear infinite;
}

.progress-fill.complete {
    animation: none;
}

.progress-percentage {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #333;
    font-weight: bold;
    text-shadow: 1px 1px 1px rgba(255, 255, 255, 0.5);
    z-index: 1;
}

@keyframes stripes {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 40px 0;
    }
}

select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 16px;
    margin-top: 10px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background: url('data:image/svg+xml;utf8,<svg fill="black" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/><path d="M0 0h24v24H0z" fill="none"/></svg>') no-repeat;
    background-position: right 10px top 50%;
}

@media (min-width: 768px) {
    .container {
        max-width: 750px;
        padding: 20px;
    }

    main {
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
    }

    .content {
        flex: 1;
        margin-right: 20px;
        min-width: 300px;
    }

    .sidebar {
        width: 200px;
        min-width: 200px;
    }

    button {
        width: auto;
    }

    h1 {
        font-size: 28px;
    }
}