/* 
    Quick Reference Page Styles
    
    This file contains styles for the quick reference/glossary page
    that provides easy lookup of HTML tags and CSS properties.
    
    Students can learn how to create organized, scannable reference
    materials with visual hierarchy and clear categorization.
*/

.reference-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.reference-header {
    margin-bottom: 3rem;
    text-align: center;
}

.reference-header h1 {
    color: var(--primary-color, #2563eb);
    margin-bottom: 1rem;
    font-size: 2.5rem;
}

.intro-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color, #334155);
    max-width: 800px;
    margin: 0 auto;
}

/* 
    Quick Navigation
    
    Provides easy jumping to different sections of the reference.
*/
.quick-nav {
    background-color: #f0f9ff;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 3rem;
    border-left: 4px solid var(--primary-color, #2563eb);
}

.quick-nav h2 {
    margin-bottom: 1.5rem;
    color: var(--primary-color, #2563eb);
}

.nav-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.nav-button {
    display: block;
    padding: 0.75rem 1rem;
    background-color: white;
    color: var(--primary-color, #2563eb);
    text-decoration: none;
    border-radius: 4px;
    border: 1px solid #e2e8f0;
    text-align: center;
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-button:hover {
    background-color: var(--primary-color, #2563eb);
    color: white;
    border-color: var(--primary-color, #2563eb);
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.nav-button:focus {
    outline: 2px solid var(--primary-color, #2563eb);
    outline-offset: 2px;
}

/* 
    Reference Sections
    
    Each major section (HTML tags, CSS properties, etc.)
    has clear visual separation.
*/
.reference-section {
    margin-bottom: 4rem;
    padding-bottom: 3rem;
    border-bottom: 2px solid #e2e8f0;
    scroll-margin-top: 80px;
}

.reference-section:last-of-type {
    border-bottom: none;
}

.reference-section h2 {
    color: var(--primary-color, #2563eb);
    margin-bottom: 1rem;
    font-size: 2rem;
}

.section-intro {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color, #334155);
    margin-bottom: 2rem;
}

/* 
    Tag/Property Categories
    
    Groups related tags or properties together.
*/
.tag-category,
.property-category,
.unit-category {
    margin-bottom: 3rem;
}

.tag-category h3,
.property-category h3,
.unit-category h3 {
    color: #1e293b;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e2e8f0;
}

/* 
    Grid Layouts
    
    Creates responsive card grids for tags, properties, and attributes.
*/
.tag-grid,
.property-grid,
.attribute-grid,
.unit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* 
    Tag Cards
    
    Individual cards showing HTML tags with examples.
*/
.tag-card,
.property-card,
.attribute-card,
.unit-card {
    background-color: white;
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 8px;
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.tag-card:hover,
.property-card:hover,
.attribute-card:hover,
.unit-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.tag-name,
.property-name,
.attribute-name,
.unit-name {
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color, #2563eb);
    margin-bottom: 0.75rem;
    padding: 0.5rem;
    background-color: #f8fafc;
    border-radius: 4px;
}

.tag-description,
.property-description,
.attribute-description,
.unit-description {
    color: var(--text-color, #334155);
    line-height: 1.6;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.tag-example,
.property-example,
.attribute-example,
.unit-example {
    margin-top: 1rem;
}

.tag-example pre,
.property-example pre,
.attribute-example pre,
.unit-example pre {
    margin: 0;
    background-color: #1e293b;
    border-radius: 4px;
}

/* 
    Footer Navigation
    
    Easy way to return to homepage.
*/
.reference-footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 2px solid #e2e8f0;
    text-align: center;
}

.reference-footer p {
    margin-bottom: 0.5rem;
    color: var(--text-color, #334155);
}

.reference-footer a {
    color: var(--primary-color, #2563eb);
    text-decoration: none;
    font-weight: 600;
}

.reference-footer a:hover {
    text-decoration: underline;
}

/* 
    Responsive Design
    
    Stacks cards on smaller screens for better mobile experience.
*/
@media (max-width: 768px) {
    .reference-container {
        padding: 1rem 0.5rem;
    }

    .reference-header h1 {
        font-size: 2rem;
    }

    .tag-grid,
    .property-grid,
    .attribute-grid,
    .unit-grid {
        grid-template-columns: 1fr;
    }

    .nav-buttons {
        grid-template-columns: 1fr;
    }

    .reference-section h2 {
        font-size: 1.75rem;
    }
}