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

header {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px;
    font-size: 1.2em;
}

.language-selector {
    text-align: center;
    padding: 15px;
    background-color: #fff;
    margin: 10px auto;
    max-width: 300px;
    border-radius: 8px;
    box-shadow: 0 0 5px rgba(0,0,0,0.1);
}

.language-selector select {
    padding: 8px 15px;
    font-size: 1em;
    border-radius: 4px;
    border: 1px solid #ccc;
}

/* Top Section: Two Boxes Side by Side */
.top-section {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.features-box, .intro-box {
    background-color: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    flex: 1;
    max-width: 550px;
}

.features-box h2, .intro-box h2 {
    text-align: center;
    color: #333;
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 1.5em;
}

.features-box ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.features-box li {
    padding: 10px 0;
    border-bottom: 1px solid #eee;
    font-size: 1.05em;
}

.features-box li:last-child {
    border-bottom: none;
}

.intro-box p {
    line-height: 1.8;
    font-size: 1.1em;
    text-align: justify;
    margin: 15px 0;
}

/* Center Section: Setup Instructions */
.setup-section {
    background-color: white;
    margin: 20px auto;
    padding: 30px;
    max-width: 1100px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.setup-section h2 {
    text-align: center;
    color: #333;
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1.8em;
}

#setup-content p {
    line-height: 1.8;
    font-size: 1.1em;
    text-align: center;
    margin: 15px 0;
}

#setup-content ol {
    max-width: 800px;
    margin: 20px auto;
    padding-left: 30px;
}

#setup-content li {
    margin: 12px 0;
    font-size: 1.05em;
    line-height: 1.6;
}

#setup-content hr {
    border: none;
    border-top: 2px solid #4CAF50;
    margin: 25px 0;
    width: 50%;
}

/* Bottom Section: Two Boxes */
.bottom-section {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.language-box {
    background-color: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    flex: 1;
    max-width: 550px;
}

.language-box h2 {
    text-align: center;
    color: #333;
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 1.5em;
}

.language-box ol {
    padding-left: 25px;
}

.language-box li {
    margin: 10px 0;
    font-size: 1.05em;
    line-height: 1.6;
}

/* Footer Section: Centered */
footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 20px;
}

footer p {
    margin: 0;
    font-size: 0.9em;
}

.footer-section {
    background-color: white;
    margin: 20px auto;
    padding: 30px;
    max-width: 1100px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    text-align: center;
}

.footer-section p {
    line-height: 1.8;
    font-size: 1.1em;
    text-align: center;
    margin: 15px 0;
}

/* Video Section Styles */
.video-section {
    background-color: white;
    margin: 20px auto;
    padding: 30px;
    max-width: 1000px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.video-section h2 {
    text-align: center;
    color: #333;
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1.8em;
}

.video-instruction {
    text-align: center;
    margin: 12px auto 18px;
    color: #555;
    max-width: 820px;
    font-size: 1.05rem;
    line-height: 1.5;
}

.video-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.image-slider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.slider-window {
    overflow: hidden;
    flex: 1;
    min-width: 320px;
    max-width: 920px;
    border-radius: 10px;
}

.slider-track {
    display: flex;
    gap: 10px;
    transition: transform 0.35s ease-in-out;
}

.slider-item {
    flex: 0 0 100%;
    min-width: 100%;
}

.slider-item img {
    width: 100%;
    height: auto;
    max-height: 520px;
    object-fit: contain;
    border-radius: 10px;
    display: block;
}

.slider-window {
    max-width: 100%;
}

.slider-dots {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    gap: 4px;
    padding: 6px 0 4px;
}

.slider-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    border: none;
    background: #c4c4c4;
    cursor: pointer;
    transition: background 0.25s ease, transform 0.25s ease;
}

.slider-dot.active {
    background: #0a6cff;
    transform: scale(1.1);
}

.slider-btn {
    background-color: #fff;
    border: 1px solid #ccc;
    color: #333;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.4rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

.slider-btn:hover {
    background-color: #f0f0f0;
}

.video-wrapper {
    flex: 1 1 300px;
    min-width: 280px;
}

.download-button {
    display: inline-block;
    margin-top: 18px;
    padding: 12px 24px;
    background-color: #0078d7;
    color: #fff;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.download-button:hover,
.download-button:focus {
    background-color: #005bb5;
    transform: translateY(-1px);
}

.container {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.column {
    background-color: white;
    padding: 24px;
    border-radius: 18px;
    box-shadow: 0 0 18px rgba(0,0,0,0.12);
    width: calc(33.333% - 20px);
    min-width: 280px;
    text-align: center;
}

@media (max-width: 960px) {
    .column {
        width: 100%;
    }
}

.video-wrapper iframe {
    width: 100%;
    height: 260px;
    border: none;
    border-radius: 10px;
}

@media (max-width: 900px) {
    .slider-item {
        flex: 0 0 50%;
        min-width: 50%;
    }
}

@media (max-width: 640px) {
    .image-slider {
        flex-direction: column;
    }

    .slider-btn {
        width: 38px;
        height: 38px;
    }

    .slider-item {
        flex: 0 0 100%;
        min-width: 100%;
    }
}

.video-wrapper {
    width: 320px;
    height: 180px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.video-wrapper iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Download Buttons Container */
.container {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.column {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    width: 30%;
    text-align: center;
}

.column h2 {
    margin-top: 0;
}

.logo {
    width: 100px;
    height: 100px;
    display: block;
    margin: 0 auto 10px;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 4px;
    font-size: 1em;
    margin-top: 10px;
}

button:hover {
    background-color: #45a049;
}