/* Main Stylesheet - Medium-dark background with WCAG AA/AAA compliant colors */

:root {
    --bg-primary: #2d2d2d;
    --bg-secondary: #1e1e1e;
    --text-primary: #e8e8e8;
    --text-secondary: #b8b8b8;
    --link-color: #7c9eff;
    --link-hover: #9bb3ff;
    --link-visited: #a58fff;
    --accent-color: #7c9eff;
    --border-color: #404040;
    --focus-color: #9bb3ff;
    --error-color: #ff6b6b;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent-color);
    color: var(--bg-primary);
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* Header and Navigation */
header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.25rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
}

.logo-text {
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s;
}

.nav-menu a:hover,
.nav-menu a:focus {
    color: var(--link-hover);
    outline: 2px solid var(--focus-color);
    outline-offset: 2px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s;
}

/* Dropdown menu */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    list-style: none;
    min-width: 200px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}

.dropdown:hover .dropdown-menu,
.dropdown:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    display: block;
    padding: 0.5rem 1rem;
}

/* Layout */
.layout-container {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
    gap: 2rem;
    flex: 1;
}

.main-content {
    flex: 1;
    min-width: 0;
}

.feed-sidebar {
    width: 300px;
    flex-shrink: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
}

/* Links */
a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s;
}

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

a:visited {
    color: var(--link-visited);
}

a:focus {
    outline: 2px solid var(--focus-color);
    outline-offset: 2px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--accent-color);
    color: var(--bg-primary);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.2s;
}

.btn:hover {
    background: var(--link-hover);
}

.btn:focus {
    outline: 2px solid var(--focus-color);
    outline-offset: 2px;
}

/* Articles and Pages */
article {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.page-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.page-summary {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.page-content {
    line-height: 1.8;
}

.page-content img {
    max-width: 100%;
    height: auto;
}

/* Breadcrumbs */
.breadcrumbs {
    margin-bottom: 1rem;
}

.breadcrumbs ol {
    list-style: none;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.breadcrumbs li::after {
    content: '/';
    margin-left: 0.5rem;
    color: var(--text-secondary);
}

.breadcrumbs li:last-child::after {
    content: '';
}

.breadcrumbs a {
    color: var(--link-color);
}

/* Feed Sidebar */
.feed-container {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.feed-container h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.feed-item {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.feed-item:last-child {
    border-bottom: none;
}

.feed-author {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.feed-content {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.feed-time {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.feed-link {
    font-size: 0.85rem;
}

.feed-empty {
    color: var(--text-secondary);
    font-style: italic;
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 1rem;
    text-align: center;
    color: var(--text-secondary);
    margin-top: auto;
}

/* Error pages */
.error-page {
    text-align: center;
    padding: 4rem 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.error-page h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.error-page p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

/* Blog */
.blog-nav {
    margin-bottom: 2rem;
}

.article-menu {
    list-style: none;
}

.article-menu li {
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.article-menu a {
    color: var(--text-primary);
    text-decoration: none;
}

.article-menu h3 {
    margin-bottom: 0.5rem;
}

.article-menu p {
    color: var(--text-secondary);
    margin: 0;
}

.blog-article {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.blog-article:last-child {
    border-bottom: none;
}

.article-summary {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

/* Code blocks */
pre {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    margin: 1rem 0;
}

code {
    background: var(--bg-secondary);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

pre code {
    background: transparent;
    padding: 0;
}

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

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

th {
    background: var(--bg-secondary);
    font-weight: 600;
}

/* Lists */
ul, ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--focus-color);
    outline-offset: 2px;
}

button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--focus-color);
    outline-offset: 2px;
}

/* Contact Form Styles */
.contact-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.contact-form {
    margin-top: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group .required {
    color: var(--error-color);
}

.form-group input[type="text"],
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input[type="text"]:focus,
.form-group textarea:focus {
    border-color: var(--focus-color);
    outline: none;
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.form-help {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--accent-color);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: var(--link-hover);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: #2a2a2a;
}

/* Alert Styles */
.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
}

.alert-success {
    background: rgba(76, 175, 80, 0.2);
    border: 1px solid rgba(76, 175, 80, 0.5);
    color: #a5d6a7;
}

.alert-error {
    background: rgba(244, 67, 54, 0.2);
    border: 1px solid rgba(244, 67, 54, 0.5);
    color: #ef9a9a;
}

.alert strong {
    display: block;
    margin-bottom: 0.5rem;
}

.alert small {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    opacity: 0.8;
}