/* TinyTorch Academic Styles */

/* Academic Typography - Optimized for Educational Content */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* Typography CSS Custom Properties */
:root {
    --font-family-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    --font-family-mono: 'JetBrains Mono', 'SF Mono', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;
    
    /* Font sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    
    /* Colors */
    --color-text-primary: #1a202c;
    --color-text-secondary: #2d3748;
    --color-text-muted: #4a5568;
    --color-text-light: #718096;
}

/* Logo styling */
.navbar-brand img {
    width: auto;
}

/* Clean, academic styling */
.bd-main {
    background-color: white;
}

.bd-content {
    background-color: white;
    font-family: var(--font-family-sans);
}

/* Academic headings - Clean, readable hierarchy */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-sans);
    color: var(--color-text-primary);
    font-weight: 600;
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    line-height: 1.3;
    letter-spacing: -0.025em;
}

h1 {
    border-bottom: 2px solid #3498db;
    padding-bottom: 0.6rem;
    font-size: 2.5rem;
    font-weight: 700;
    margin-top: 0;
}

h2 {
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 0.4rem;
    font-size: 2rem;
    font-weight: 600;
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

h4 {
    font-size: 1.25rem;
    font-weight: 500;
}

h5, h6 {
    font-size: 1.1rem;
    font-weight: 500;
}

/* Professional code blocks */
.highlight {
    border-radius: 8px;
    margin: 1.5em 0;
    border: 1px solid #e2e8f0;
    font-family: var(--font-family-mono);
    font-size: 0.9em;
    line-height: 1.6;
    background-color: #f8fafc;
}

code {
    font-family: var(--font-family-mono);
    font-size: 0.9em;
    background-color: #f1f5f9;
    padding: 0.15em 0.4em;
    border-radius: 4px;
    border: 1px solid #e2e8f0;
}

pre code {
    background-color: transparent;
    padding: 0;
    border: none;
    border-radius: 0;
}

/* Academic sidebar styling */
.bd-sidebar {
    background-color: #f8f9fb;
    border-right: 1px solid #e1e4e8;
}

.bd-toc .nav > li > a {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    padding: 0.4rem 1rem;
    font-family: var(--font-family-sans);
    font-weight: 400;
    line-height: 1.5;
}

.bd-toc .nav > li > a:hover {
    color: #0366d6;
    background-color: #f1f8ff;
    font-weight: 500;
}

/* Professional header styling */
.bd-header {
    background-color: #ffffff;
    border-bottom: 2px solid #e1e4e8;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Clean footer styling */
.bd-footer {
    background-color: #f6f8fa;
    border-top: 1px solid #d1d9e0;
    margin-top: 3rem;
    padding: 2rem 0;
    color: #586069;
}

/* Enhanced content readability */
.bd-article {
    font-size: 17px;
    line-height: 1.6;
    color: var(--color-text-secondary);
    max-width: 800px;
    font-weight: 400;
}

.bd-article p {
    margin-bottom: 1em;
}

.bd-article li {
    margin-bottom: 0.3em;
    line-height: 1.6;
}

.bd-article blockquote {
    border-left: 4px solid #e2e8f0;
    margin: 1.2em 0;
    padding: 0.8em 1.2em;
    background-color: #f8fafc;
    font-style: italic;
    color: #4a5568;
}

/* Professional TinyTorch branding */
.navbar-brand {
    font-weight: 700;
    color: var(--color-text-primary) !important;
    font-family: var(--font-family-sans);
    font-size: 1.5rem;
    letter-spacing: -0.025em;
}

/* Academic admonitions */
.admonition {
    border-radius: 6px;
    margin: 1.5em 0;
    padding: 1rem 1.2rem;
    border-left: 4px solid #3498db;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.admonition-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text-primary);
    font-family: var(--font-family-sans);
    font-size: 1.1em;
}

.admonition.note {
    background-color: #f8f9ff;
    border-left-color: #3498db;
}

.admonition.tip {
    background-color: #f0fff4;
    border-left-color: #28a745;
}

.admonition.warning {
    background-color: #fffbf0;
    border-left-color: #ffc107;
}

.admonition.important {
    background-color: #fff5f5;
    border-left-color: #dc3545;
}

/* Professional buttons and links */
a {
    color: #0366d6;
    text-decoration: none;
}

a:hover {
    color: #0256cc;
    text-decoration: underline;
}

/* Academic table styling */
table {
    border-collapse: collapse;
    margin: 1.5em 0;
    width: 100%;
}

th, td {
    border: 1px solid #d1d9e0;
    padding: 0.75rem;
    text-align: left;
}

th {
    background-color: #f6f8fa;
    font-weight: 600;
    color: var(--color-text-primary);
    font-family: var(--font-family-sans);
}

td {
    font-family: var(--font-family-sans);
    color: var(--color-text-secondary);
}

/* Professional grid cards */
.grid-item-card {
    border: 1px solid #d1d9e0;
    border-radius: 6px;
    padding: 1.5rem;
    margin: 1rem 0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    transition: box-shadow 0.2s ease;
}

.grid-item-card:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

/* Academic navigation */
.prev-next-area {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #e1e4e8;
}

/* Professional badges */
.badges {
    margin: 1rem 0;
    font-size: 0.9rem;
    color: #586069;
}

/* Enhanced accessibility and focus states */
*:focus {
    outline: 2px solid #3498db;
    outline-offset: 2px;
}

/* Better text selection */
::selection {
    background-color: #3498db;
    color: white;
}

::-moz-selection {
    background-color: #3498db;
    color: white;
}

/* Typography fine-tuning for better readability */
.bd-article {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Improved link hover states */
.bd-article a {
    transition: color 0.2s ease;
    font-weight: 500;
}

.bd-article a:hover {
    color: #2563eb;
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}

/* Better spacing for lists in articles */
.bd-article ul, .bd-article ol {
    padding-left: 1.5rem;
    margin: 1em 0;
}

.bd-article ul li, .bd-article ol li {
    margin-bottom: 0.4em;
}

/* Improved strong/bold text */
.bd-article strong, .bd-article b {
    font-weight: 600;
    color: var(--color-text-primary);
}