* {
    box-sizing: border-box; 
    margin: 0;
    padding: 0;
    color: white;
    /*font-family: 'Fira Code', 'IBM Plex Mono', 'Courier New', monospace;*/
}

body {
    background-color: black;
}

#return-btn {
    background: transparent;
    color: white;
    height: 60px;
    width: 200px;        
    font-size: 24px; 
    cursor: pointer;
    border: 2px solid rgb(121, 120, 120);
    transition: border-color 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
}

#topbar {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px;
}

#btn-holder {
    display: flex;
    flex-direction: row; 
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px;
}

.subfolder-tray {
    display: flex;
    flex-direction: row;
    gap: 10px;
    width: 100%; 
    justify-content: center;
    padding: 10px 0;
}

.subfolder-tray.hidden-tray {
    display: none !important;
}

.article-btn {
    background: transparent;
    color: white;
    height: 40px;
    width: 200px;        
    font-size: 16px;
    cursor: pointer;
    border: 2px solid grey;
}

.article-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.folder-btn {
    background-color: #1a252f;
    color: #ecf0f1;
    font-weight: bold;
    height: 40px;
    width: 200px; 
    font-size: 16px;
    border: 2px solid #34495e;
    cursor: pointer;
}

.folder-btn:hover {
    background-color: #2c3e50;
}

#markdown-content {
    text-align: left;         
    max-width: 800px;        
    margin: 3rem auto;        
    padding: 0 20px;
    font-size: 20px;          
    line-height: 1.6; 
}

#markdown-content h1, 
#markdown-content h2, 
#markdown-content h3 {
    text-align: center;
    margin: 2rem 0 1rem 0;
    text-transform: uppercase;
}

#markdown-content p {
    margin-bottom: 1.5rem;
}