/* Universal Typography & Reset */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Helvetica Neue', Arial, sans-serif;
}

body {
    display: flex;
    background-color: #fcfcfc;
    color: #2c3e50;
    height: 100vh;
    overflow: hidden;
}

/* Left Sidebar Layout */
.sidebar {
    width: 320px;
    background-color: #1a252f;
    color: #ecf0f1;
    padding: 25px;
    overflow-y: auto;
    border-right: 3px solid #34495e;
}

.logo-area h2 {
    color: #ffffff;
    font-size: 1.4rem;
    letter-spacing: 0.5px;
}

.logo-area p {
    color: #95a5a6;
    font-size: 0.85rem;
    margin-top: 5px;
}

hr {
    border: 0;
    border-top: 1px solid #34495e;
    margin: 20px 0;
}

/* Navigation Lists */
h3 {
    font-size: 0.95rem;
    text-transform: uppercase;
    color: #3498db;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.source-text {
    font-size: 0.75rem;
    font-style: italic;
    color: #bdc3c7;
    margin-top: -8px;
    margin-bottom: 12px;
}

ul {
    list-style: none;
}

li {
    margin-bottom: 8px;
}

.stub {
    display: block;
    color: #ecf0f1;
    text-decoration: none;
    font-size: 0.9rem;
    padding: 6px 8px;
    border-radius: 4px;
    transition: background 0.2s;
}

.stub:hover {
    background-color: #2c3e50;
    color: #3498db;
}

.inactive {
    color: #7f8c8d;
    font-style: italic;
    pointer-events: none;
}

/* Right Content Pane */
.content-pane {
    flex: 1;
    padding: 50px 60px;
    overflow-y: auto;
    max-width: 900px;
}

h1 {
    font-size: 2.5rem;
    color: #2c3e50;
}

.subtitle {
    font-size: 1.1rem;
    color: #7f8c8d;
    margin-top: 5px;
}

.content-pane hr {
    border-top: 1px solid #dcdde1;
}

.abstract h3 {
    font-size: 1.25rem;
    color: #2c3e50;
    text-transform: none;
    margin-bottom: 15px;
}

.abstract p {
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: 15px;
    text-align: justify;
}