body {
    font-family: 'Segoe UI', sans-serif;
    background: #000000;
    padding: 20px;
    scroll-behavior: smooth;
}
.container {
    background: white;
    padding: 30px;
    border-radius: 8px;
    max-width: 1000px;
    margin: auto;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    position: relative;
}
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid #eee;
    margin-bottom: 20px; padding-bottom: 10px;
}
/* Darkened Sticky AZ Navigation */
.az-nav {
    position: sticky;
    top: 0;
    background: #2c3e50; /* Dark Background */
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 30px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    z-index: 100;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
.az-nav a {
    text-decoration: none;
    color: #ecf0f1;
    font-weight: bold;
    padding: 6px 12px;
    border-radius: 4px;
    border: 1px solid #34495e;
    font-size: 0.9em;
    transition: 0.2s;
}
.az-nav a:hover {
    background: #3498db;
    color: white;
    border-color: #3498db;
}

/* Sections */
.letter-section {
    margin-bottom: 40px;
    scroll-margin-top: 100px;
}
.letter-title {
    font-size: 1.8em;
    color: #2c3e50;
    border-bottom: 3px solid #3498db;
    margin-bottom: 15px;
    padding-bottom: 5px;
    display: flex;
    align-items: baseline;
}
.letter-count {
    font-size: 0.5em;
    color: #888;
    margin-left: 10px;
    font-weight: normal;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Verb Grid */
.verb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 10px;
}
.verb-link {
    color: #3498db;
    text-decoration: none;
    padding: 8px;
    border-radius: 4px;
    border: 1px solid transparent;
    transition: 0.2s;
    display: block;
}
.verb-link:hover {
    background: #f0f7ff;
    border-color: #d0e7ff;
    color: #2980b9;
    font-weight: bold;
}

.back-btn {
    background: #3498db;
    color: white;
    padding: 8px 15px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.9em;
    font-weight: bold;
}

/* Back to Top Button */
#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: #e74c3c; /* Red color to stand out */
    color: white;
    padding: 12px 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    display: none;
    z-index: 1000;
    transition: transform 0.2s;
}
#backToTop:hover {
    transform: scale(1.1);
    background: #c0392b;
}