/* Synchronism Web Framework Styles */

:root {
    --primary-color: #f4e8d0;  /* Light papyrus background */
    --secondary-color: #e8dcc0; /* Darker papyrus */
    --accent-color: #d4c4a8;    /* Accent papyrus */
    --highlight-color: #8b4513; /* Saddle brown for highlights */
    --text-primary: #2c1810;    /* Dark brown/black text */
    --text-secondary: #4a3426;  /* Medium brown text */
    --text-muted: #6b5243;      /* Light brown text */
    --border-color: #a89274;    /* Brown border */
    --bg-card: #ede1c9;         /* Card background papyrus */
    --bg-code: #e0d4bc;         /* Code background papyrus */
    --sidebar-width: 280px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Georgia, 'Times New Roman', serif;
    background-color: var(--primary-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(139, 69, 19, 0.03) 2px,
            rgba(139, 69, 19, 0.03) 4px
        ),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(139, 69, 19, 0.03) 2px,
            rgba(139, 69, 19, 0.03) 4px
        );
}

/* Sidebar Navigation */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(180deg, var(--secondary-color) 0%, var(--accent-color) 100%);
    border-right: 2px solid var(--border-color);
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
}

.nav-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    background: var(--secondary-color);
}

.nav-header h2 {
    color: var(--highlight-color);
    font-size: 1.8rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.version-badge {
    background: var(--highlight-color);
    color: var(--primary-color);
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
}

.nav-section {
    margin: 20px 0;
}

.nav-section h3 {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 10px;
    padding: 0 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.nav-section ul {
    list-style: none;
}

.nav-section ul li {
    margin: 2px 0;
}

.nav-link {
    display: block;
    padding: 10px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background: rgba(139, 69, 19, 0.1);
    color: var(--text-primary);
    border-left-color: var(--highlight-color);
}

.nav-link.active {
    background: rgba(139, 69, 19, 0.15);
    color: var(--text-primary);
    border-left-color: var(--highlight-color);
    font-weight: 600;
}

.nav-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.license-info img {
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.license-info img:hover {
    opacity: 1;
}

/* Main Content */
.content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    background: var(--primary-color);
}

.page-header {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--secondary-color) 100%);
    padding: 60px 40px;
    border-bottom: 3px solid var(--highlight-color);
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 15px;
    color: var(--text-primary);
    font-weight: 700;
}

.subtitle {
    font-size: 1.4rem;
    color: var(--highlight-color);
    margin-bottom: 10px;
    font-weight: 600;
}

.description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Content Sections */
.content-section {
    padding: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.content-section h2 {
    color: var(--highlight-color);
    font-size: 2.2rem;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--highlight-color);
    padding-bottom: 10px;
    font-weight: 700;
}

.content-section h3 {
    color: var(--text-primary);
    font-size: 1.6rem;
    margin: 30px 0 15px 0;
    font-weight: 600;
}

.content-section h4 {
    color: var(--text-secondary);
    font-size: 1.3rem;
    margin: 25px 0 12px 0;
    font-weight: 600;
}

.section-content {
    margin-bottom: 40px;
}

.section-content p {
    margin-bottom: 15px;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Special Content Blocks */
.key-concept {
    background: var(--bg-card);
    border-left: 4px solid var(--highlight-color);
    padding: 20px;
    margin: 25px 0;
    border-radius: 0 8px 8px 0;
    font-style: italic;
}

.key-concept strong {
    color: var(--highlight-color);
    font-size: 1.2rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin: 30px 0;
}

.feature-card {
    background: var(--bg-card);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(139, 69, 19, 0.15);
}

.feature-card h3 {
    color: var(--highlight-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.feature-card p {
    color: var(--text-secondary);
    margin: 0;
}

/* Mathematical Content */
.math-section {
    background: var(--bg-code);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
}

.math-section h4 {
    color: var(--highlight-color);
    margin-bottom: 15px;
}

.equation-block {
    background: var(--bg-card);
    padding: 15px;
    border-radius: 6px;
    margin: 15px 0;
    border-left: 3px solid var(--highlight-color);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: var(--bg-card);
    border-radius: 8px;
    overflow: hidden;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background: var(--accent-color);
    color: var(--text-primary);
    font-weight: 600;
}

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

/* Code Blocks */
pre, code {
    font-family: 'Fira Code', 'Courier New', monospace;
    background: var(--bg-code);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

pre {
    padding: 15px;
    overflow-x: auto;
    margin: 15px 0;
}

code {
    padding: 2px 6px;
    font-size: 0.9em;
}

/* Links */
a {
    color: var(--highlight-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #a0522d;
    text-decoration: underline;
}

/* Footer */
.page-footer {
    background: var(--secondary-color);
    padding: 30px 40px;
    text-align: center;
    border-top: 2px solid var(--border-color);
    margin-top: 60px;
}

.page-footer p {
    color: var(--text-muted);
    margin: 5px 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .content {
        margin-left: 0;
    }
    
    .content-section {
        padding: 20px;
    }
    
    .page-header {
        padding: 40px 20px;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.2rem;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus States */
.nav-link:focus,
a:focus {
    outline: 2px solid var(--highlight-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .sidebar {
        display: none;
    }
    
    .content {
        margin-left: 0;
    }
    
    .page-header {
        background: none;
        color: black;
    }
    
    .content-section {
        padding: 20px;
    }
}