/* Grammar Guide Stylesheet - v1.0 */

:root {
    --primary-color: #2c3e50;
    --accent-color: #3498db;
    --text-color: #333;
    --bg-color: #fafafa;
    --sidebar-bg: #f0f0f0;
    --border-color: #ddd;
    --code-bg: #f5f5f5;
}

* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    font-family: Georgia, 'Times New Roman', serif;
    line-height: 1.7;
    color: var(--text-color);
    background: var(--bg-color);
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: 250px 1fr;
    grid-template-rows: auto 1fr auto;
    grid-template-areas:
        "header header"
        "sidebar main"
        "footer footer";
    min-height: 100vh;
}

/* Header */
header {
    grid-area: header;
    background: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    border-bottom: 3px solid var(--accent-color);
}

.header-content {
    max-width: 1200px;
}

.site-title {
    margin: 0;
    font-size: 1.5rem;
}

.site-title a {
    color: white;
    text-decoration: none;
}

.site-title a:hover {
    color: var(--accent-color);
}

.site-subtitle {
    margin: 0.25rem 0 0;
    font-size: 0.9rem;
    opacity: 0.8;
    font-style: italic;
}

/* Sidebar Navigation */
#sidebar {
    grid-area: sidebar;
    background: var(--sidebar-bg);
    padding: 1.5rem 1rem;
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    position: sticky;
    top: 0;
    height: 100vh;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #666;
    margin: 0 0 0.5rem;
    padding-bottom: 0.25rem;
    border-bottom: 1px solid var(--border-color);
}

#sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#sidebar li {
    margin: 0.25rem 0;
}

#sidebar a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.9rem;
    display: block;
    padding: 0.25rem 0.5rem;
    border-radius: 3px;
}

#sidebar a:hover {
    background: var(--accent-color);
    color: white;
}

/* Main Content */
main {
    grid-area: main;
    padding: 2rem 3rem;
    max-width: 900px;
}

article h1 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.5rem;
    margin-top: 0;
}

article h2 {
    color: var(--primary-color);
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

article h3 {
    color: #444;
    margin-top: 1.5rem;
}

article h4 {
    color: #555;
    margin-top: 1.25rem;
}

/* Links */
a {
    color: var(--accent-color);
}

a:hover {
    color: var(--primary-color);
}

/* Tables */
table {
    border-collapse: collapse;
    width: 100%;
    margin: 1rem 0;
    font-size: 0.95rem;
}

th, td {
    border: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
    text-align: left;
}

th {
    background: var(--sidebar-bg);
    font-weight: bold;
}

tr:nth-child(even) {
    background: #fafafa;
}

/* Code and examples */
code {
    font-family: 'Consolas', 'Monaco', monospace;
    background: var(--code-bg);
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
    font-size: 0.9em;
}

pre {
    background: var(--code-bg);
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

pre code {
    padding: 0;
    background: none;
}

/* Italic examples (linguistic) */
em {
    font-style: italic;
}

/* Bold for emphasis */
strong {
    font-weight: bold;
    color: #222;
}

/* Blockquotes */
blockquote {
    border-left: 4px solid var(--accent-color);
    margin: 1rem 0;
    padding: 0.5rem 1rem;
    background: #f9f9f9;
    font-style: italic;
}

/* Horizontal rules */
hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2rem 0;
}

/* Lists */
ul, ol {
    padding-left: 1.5rem;
}

li {
    margin: 0.25rem 0;
}

/* Footer */
footer {
    grid-area: footer;
    background: var(--primary-color);
    color: white;
    text-align: center;
    padding: 1rem;
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        grid-template-columns: 1fr;
        grid-template-areas:
            "header"
            "main"
            "footer";
    }

    #sidebar {
        display: none;
    }

    main {
        padding: 1.5rem;
    }

    table {
        font-size: 0.85rem;
    }

    th, td {
        padding: 0.4rem;
    }
}

/* Print styles */
@media print {
    body {
        display: block;
    }

    #sidebar, footer {
        display: none;
    }

    header {
        background: none;
        color: black;
        border-bottom: 2px solid black;
    }

    .site-title a {
        color: black;
    }

    main {
        max-width: 100%;
    }

    a {
        color: black;
        text-decoration: underline;
    }
}