/*
Theme Name: Nine Mi
Theme URI: https://9imi.com
Author: Your Name
Author URI: https://9imi.com
Description: A modern, minimalist WordPress theme inspired by 9imi.com. Features responsive design, clean typography, and elegant layouts perfect for blogs, portfolios, and business websites.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: nine-mi
Tags: one-column, two-columns, right-sidebar, custom-logo, custom-menu, featured-images, translation-ready, blog, portfolio
*/

/* ========================================
   1. CSS Reset & Base Styles
   ======================================== */

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

:root {
    /* Color Palette */
    --color-primary: #2563eb;
    --color-secondary: #64748b;
    --color-accent: #f59e0b;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-background: #ffffff;
    --color-background-alt: #f8fafc;
    --color-border: #e2e8f0;
    
    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-family-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;
    --font-size-4xl: 36px;
    --font-size-5xl: 48px;
    --line-height-base: 1.6;
    --line-height-heading: 1.2;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Layout */
    --container-width: 1200px;
    --container-narrow: 768px;
    --sidebar-width: 300px;
    
    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --transition-base: all 0.3s ease;
    --border-radius: 8px;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   2. Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: 700;
    line-height: var(--line-height-heading);
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-base);
}

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

strong, b {
    font-weight: 600;
}

em, i {
    font-style: italic;
}

/* ========================================
   3. Layout
   ======================================== */

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-narrow {
    max-width: var(--container-narrow);
}

.site-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-content {
    flex: 1;
    padding: var(--spacing-3xl) 0;
}

.content-area {
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: var(--spacing-2xl);
}

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

/* ========================================
   4. Header
   ======================================== */

.site-header {
    background: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition-base);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) 0;
    min-height: 70px;
}

.site-branding {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.custom-logo-link {
    display: block;
    line-height: 1;
}

.custom-logo {
    max-height: 50px;
    width: auto;
}

.site-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: 0;
    line-height: 1;
}

.site-title a {
    color: var(--color-text);
    text-decoration: none;
}

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

.site-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
}

/* Main Navigation */
.main-navigation {
    display: flex;
    align-items: center;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.menu-toggle .icon {
    width: 24px;
    height: 24px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    display: block;
    padding: var(--spacing-sm) 0;
    color: var(--color-text);
    font-weight: 500;
    transition: var(--transition-base);
}

.nav-menu a:hover,
.nav-menu .current-menu-item > a {
    color: var(--color-primary);
}

/* Dropdown Menu */
.nav-menu .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-base);
    min-width: 200px;
    list-style: none;
    padding: var(--spacing-sm) 0;
    margin: 0;
}

.nav-menu li:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-menu .sub-menu a {
    padding: var(--spacing-sm) var(--spacing-md);
}

.nav-menu .sub-menu a:hover {
    background: var(--color-background-alt);
}



/* ========================================
   6. Posts & Cards
   ======================================== */

.latest-posts {
    margin-bottom: var(--spacing-2xl);
}

.main-post {
    margin-bottom: var(--spacing-xl);
}

.post-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    background: var(--color-background);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: var(--transition-base);
}

.post-main:hover {
    box-shadow: var(--shadow-md);
}

.post-main .post-thumbnail {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.post-main .post-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--spacing-2xl);
}

.post-main .post-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.post-main .post-excerpt {
    margin-bottom: var(--spacing-lg);
    display: block;
    -webkit-line-clamp: 3;
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.post-card {
    background: var(--color-background);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition-base);
    border: 1px solid var(--color-border);
    position: relative;
    display: flex;
    flex-direction: column;
}

.post-card:hover {
    box-shadow: var(--shadow-md);
}

.post-thumbnail {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
    background: var(--color-background-alt);
}

.post-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-base);
}

.post-card:hover .post-thumbnail img {
    transform: scale(1.05);
}

.post-thumbnail-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.placeholder-image {
    color: var(--color-text-light);
    opacity: 0.5;
}

.post-content {
    padding: var(--spacing-lg);
    flex: 1;
}

.post-categories {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
}

.post-category {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(37, 99, 235, 0.1);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-base);
}

.post-category:hover {
    background: var(--color-primary);
    color: white;
}

.post-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
    font-weight: 600;
}

.post-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition-base);
}

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

.post-excerpt {
    color: var(--color-text-light);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.post-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: var(--transition-base);
}

.post-meta span:hover {
    color: var(--color-primary);
}

.post-meta svg {
    stroke: currentColor;
    transition: var(--transition-base);
}

/* ========================================
   7. Single Post
   ======================================== */

.single-post-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.breadcrumb a {
    color: var(--color-text-light);
    text-decoration: none;
    transition: var(--transition-base);
}

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

.breadcrumb-current {
    color: var(--color-text);
    font-weight: 500;
}

.single-post-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-lg);
}

.single-post-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.featured-image {
    margin-bottom: var(--spacing-2xl);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.featured-image img {
    width: 100%;
    height: auto;
}

.entry-content {
    font-size: var(--font-size-lg);
    line-height: 1.8;
}

.entry-content h2 {
    margin-top: var(--spacing-2xl);
}

.entry-content h3 {
    margin-top: var(--spacing-xl);
}

.entry-content img {
    border-radius: var(--border-radius);
    max-width: 100%;
    height: auto;
}

.entry-content blockquote {
    border-left: 4px solid var(--color-primary);
    padding-left: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    font-style: italic;
    color: var(--color-text-light);
}

.entry-content pre {
    background: var(--color-text);
    color: var(--color-background);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    overflow-x: auto;
}

.entry-content code {
    background: var(--color-background-alt);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Monaco', 'Consolas', monospace;
}

/* Post Tags */
.post-tags {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.post-tags a {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    margin: var(--spacing-xs);
    background: var(--color-background-alt);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
}

.post-tags a:hover {
    background: var(--color-primary);
    color: white;
}

/* Author Box */
.author-box {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--color-background-alt);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-2xl);
}

.author-avatar {
    flex-shrink: 0;
}

.author-avatar img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
}

.author-info h4 {
    margin-bottom: var(--spacing-sm);
}

.author-info p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* ========================================
   8. Sidebar
   ======================================== */

.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.widget {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
}

.widget-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-primary);
}

.widget ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.widget li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.widget li:last-child {
    border-bottom: none;
}

.widget a {
    color: var(--color-text);
    text-decoration: none;
}

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

/* Search Widget */
.widget_search .search-form {
    display: flex;
    gap: var(--spacing-sm);
}

.widget_search input[type="search"] {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
}

/* Recent Posts Widget */
.widget_recent_entries li {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.widget_recent_entries .post-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* ========================================
   9. Buttons
   ======================================== */

.btn,
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-primary,
.button {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover,
.button:hover {
    background: var(--color-accent);
    color: white;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: white;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

/* ========================================
   10. Comments
   ======================================== */

.comments-area {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.comments-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.comment-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.comment-list li {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: var(--transition-base);
}

.comment-list li:hover {
    box-shadow: var(--shadow-md);
}

.comment-list .children {
    margin-top: var(--spacing-md);
    margin-left: var(--spacing-xl);
    padding-left: var(--spacing-md);
    border-left: 3px solid var(--color-primary);
}

.comment-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.comment-author {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.comment-author img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    flex-shrink: 0;
}

.comment-meta {
    flex: 1;
}

.comment-author-name {
    display: block;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.comment-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.comment-awaiting-moderation {
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    margin: var(--spacing-sm) 0;
}

.comment-content {
    line-height: 1.6;
    color: var(--color-text);
}

.comment-reply {
    margin-top: var(--spacing-sm);
}

.comment-reply a {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition-base);
}

.comment-reply a:hover {
    background: var(--color-primary);
    color: white;
}

/* Comment Navigation */
.comment-navigation {
    display: flex;
    justify-content: space-between;
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-md);
    background: var(--color-background-alt);
    border-radius: var(--border-radius);
}

.comment-navigation a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-base);
}

.comment-navigation a:hover {
    text-decoration: underline;
}

/* Comment Form */
.comment-respond {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
}

.comment-respond h3 {
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-xl);
}

.comment-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.comment-form .form-submit {
    align-self: flex-start;
}

.comment-form label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--color-text);
}

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: var(--font-family-base);
    transition: var(--transition-base);
}

.comment-form input:focus,
.comment-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.comment-form .required {
    color: var(--color-accent);
}

.no-comments {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-light);
}

/* ========================================
   11. Pagination
   ======================================== */

.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
}

.pagination .nav-links {
    display: flex;
    gap: var(--spacing-sm);
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--color-text);
    transition: var(--transition-base);
}

.pagination a:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.pagination .current {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* ========================================
   12. Footer
   ======================================== */

.site-footer {
    background: var(--color-text);
    color: var(--color-background);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-widget {
    color: var(--color-background-alt);
}

.footer-widget .widget-title {
    color: white;
    border-bottom-color: var(--color-accent);
}

.footer-widget a {
    color: var(--color-background-alt);
}

.footer-widget a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-background-alt);
    font-size: var(--font-size-sm);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: var(--transition-base);
}

.footer-social a:hover {
    background: var(--color-accent);
    transform: translateY(-2px);
}

/* ========================================
   13. Forms
   ======================================== */

input[type="text"],
input[type="email"],
input[type="url"],
input[type="password"],
input[type="search"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: var(--font-family-base);
    transition: var(--transition-base);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ========================================
   14. Utility Classes
   ======================================== */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }
.visible { visibility: visible; }
.invisible { visibility: hidden; }

/* ========================================
   15. Animations
   ======================================== */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from { transform: translateX(-100%); }
    to { transform: translateX(0); }
}

/* ========================================
   16. Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .has-sidebar .content-area {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        margin-top: var(--spacing-2xl);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 36px;
        --font-size-4xl: 30px;
        --font-size-3xl: 24px;
    }
    
    .header-container {
        padding: var(--spacing-md) 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .main-navigation {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-background);
        transform: translateX(100%);
        transition: var(--transition-base);
        padding: var(--spacing-lg);
        overflow-y: auto;
    }
    
    .main-navigation.active {
        transform: translateX(0);
    }
    
    .nav-menu {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }
    
    .nav-menu a {
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid var(--color-border);
    }
    
    .nav-menu .sub-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        border: none;
        box-shadow: none;
        padding-left: var(--spacing-lg);
        display: none;
    }
    
    .nav-menu li:hover > .sub-menu,
    .nav-menu li.menu-item-has-children.active > .sub-menu {
        display: block;
    }
    
    .post-main {
        grid-template-columns: 1fr;
    }
    
    .post-main .post-content {
        padding: var(--spacing-lg);
    }
    
    .posts-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .single-post-title {
        font-size: var(--font-size-3xl);
    }
    
    .author-box {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-lg {
        width: 100%;
    }
    
    .comment .children {
        margin-left: var(--spacing-md);
    }
}

/* ========================================
   17. Accessibility
   ======================================== */

.screen-reader-text {
    clip: rect(1px, 1px, 1px, 1px);
    position: absolute !important;
    height: 1px;
    width: 1px;
    overflow: hidden;
    word-wrap: normal !important;
}

.screen-reader-text:focus {
    background-color: var(--color-background);
    border-radius: 3px;
    box-shadow: 0 0 2px 2px rgba(0, 0, 0, 0.6);
    clip: auto !important;
    color: var(--color-text);
    display: block;
    font-size: var(--font-size-base);
    font-weight: 700;
    height: auto;
    left: 5px;
    line-height: normal;
    padding: 15px 23px 14px;
    text-decoration: none;
    top: 5px;
    width: auto;
    z-index: 100000;
}

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

/* Skip to content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 100001;
}

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

/* ========================================
   18. Print Styles
   ======================================== */

@media print {
    .site-header,
    .sidebar,
    .site-footer,
    .comments-area,
    .pagination {
        display: none;
    }
    
    .site-content {
        padding: 0;
    }
    
    body {
        font-size: 12pt;
        color: #000;
    }
    
    a {
        text-decoration: underline;
    }
}