body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: #f4f4f9;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    box-sizing: border-box;
    padding-bottom: 70px;
}

.container {
    width: 100%;
    max-width: 900px;
    text-align: center;
    animation: fadeIn 2s ease-in-out;
}

.main-layout {
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: 20px;
}

.center-content {
    width: 100%;
}

.showcase-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    margin-bottom: 40px;
}

.showcase-image {
    max-width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.title {
    font-size: 3.5rem;
    font-weight: bold;
    margin: 0;
    letter-spacing: 1px;
    background: linear-gradient(90deg, #6a11cb, #2575fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: slideIn 1s ease-out;
    line-height: 1.2;
    margin-bottom: 15px;
}

.subtitle {
    font-size: 1.6rem;
    color: #495057;
    margin-bottom: 40px;
    font-weight: 500;
    line-height: 1.4;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 40px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.download-section {
    margin-top: 30px;
    padding: 25px;
    background-color: #ffffff;
    border-radius: 8px;
    border: 1px solid #e9ecef;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.download-button {
    display: inline-block;
    background-color: #007bff;
    color: white;
    padding: 15px 30px;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

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

.instructions {
    margin-top: 25px;
    text-align: left;
    color: #495057;
}

.instructions h3 {
    color: #343a40;
    margin-bottom: 15px;
}

.instructions ol {
    padding-left: 20px;
}

.instructions li {
    margin-bottom: 10px;
    line-height: 1.6;
}

.instructions code {
    background-color: #e9ecef;
    padding: 2px 5px;
    border-radius: 3px;
    font-family: monospace;
}

#copy-url {
    cursor: pointer;
    text-decoration: underline;
    text-decoration-style: dotted;
    background-color: #d1e7fd;
    color: #0c5460;
}

#copy-url:hover {
    background-color: #b8daff;
}

.warning {
    margin-top: 20px;
    padding: 15px;
    background-color: #fff3cd;
    border: 1px solid #ffeeba;
    color: #856404;
    border-radius: 5px;
}

/* Footer Styles */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 20px;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.footer-content {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.footer-content p {
    margin: 0;
    font-size: 14px;
    opacity: 0.9;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-link {
    color: white;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.footer-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.footer-separator {
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
}

/* Mobile responsive footer */
@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 8px;
    }
    
    .footer-content p {
        font-size: 12px;
    }
    
    .footer-link {
        font-size: 13px;
        padding: 4px 8px;
    }
    
    body {
        padding-bottom: 90px;
    }
    
    /* Extension button responsive styles */
    .extension-button {
        font-size: 1.4rem;
        padding: 20px 35px;
        border-radius: 12px;
    }
    
    .official-extension {
        margin: 30px 0 40px 0;
    }
    
    /* Video section responsive styles */
    .video-section {
        margin: 30px 0;
        padding: 0 10px;
    }
    
    .video-container {
        border-radius: 10px;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }
    
    /* Title and subtitle responsive styles */
    .title {
        font-size: 2.5rem;
        margin-bottom: 10px;
    }
    
    .subtitle {
        font-size: 1.3rem;
        margin-bottom: 30px;
        padding: 0 10px;
    }
}

/* Official extension button styles */
.official-extension {
    margin: 40px 0 50px 0;
}

.extension-button {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px 50px;
    text-decoration: none;
    font-size: 1.8rem;
    font-weight: bold;
    border-radius: 15px;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.extension-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.4);
    background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
}

/* Video section styles */
.video-section {
    margin: 40px 0;
    padding: 0 20px;
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding-top: 56.25%; /* 16:9 aspect ratio */
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}