/*
Theme Name: TechBlog
Theme URI: https://example.com/techblog
Author: Your Name
Author URI: https://example.com
Description: A modern WordPress theme with mobile-first responsive design
Version: 1.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: techblog
Tags: blog, technical, modern, responsive, dark-mode
*/

/* ===== Base Styles ===== */
:root {
  --primary-color: #8b5cf6;
  --secondary-color: #ec4899;
  --accent-color: #14b8a6;
  --dark-bg: #0f172a;
  --dark-surface: #1e293b;
  --dark-text: #f1f5f9;
  --light-bg: #f8fafc;
  --light-surface: #ffffff;
  --light-text: #1e293b;
  --gray-light: #e2e8f0;
  --gray-medium: #64748b;
  --gray-dark: #475569;
  --transition: all 0.25s ease;
}

/* Global Link Styles */
a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

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

body.dark-mode a {
  color: var(--primary-color);
}

body.dark-mode a:hover {
  color: var(--secondary-color);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.7;
  color: var(--light-text);
  background-color: var(--light-bg);
  -webkit-font-smoothing: antialiased;
}

body.dark-mode {
  background-color: var(--dark-bg);
  color: var(--dark-text);
}

/* ===== Container ===== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Button Styles */
button {
  cursor: pointer;
  transition: var(--transition);
}

input, textarea, select {
  border: 2px solid var(--gray-light);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 1rem;
  color: var(--light-text);
  background: var(--light-surface);
  transition: var(--transition);
}

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

body.dark-mode input, body.dark-mode textarea, body.dark-mode select {
  border-color: var(--gray-dark);
  color: var(--dark-text);
  background: var(--dark-surface);
}

body.dark-mode input:focus, body.dark-mode textarea:focus, body.dark-mode select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

/* ===== Header ===== */
header {
  background-color: var(--light-surface);
  border-bottom: 1px solid var(--gray-light);
  position: sticky;
  top: 0;
  z-index: 100;
}

body.dark-mode header {
  background-color: var(--dark-surface);
  border-bottom-color: var(--gray-dark);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  font-size: 1.75rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  letter-spacing: -0.5px;
  transition: var(--transition);
}

.logo:hover {
  filter: brightness(1.2);
  transform: scale(1.05);
}

.nav-wrapper {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 0;
  flex-wrap: nowrap;
  border-radius: 12px;
  padding: 0 0.5rem;
  margin: 0 2rem;
  white-space: nowrap;
  padding-left: 0;
}

.nav-menu > li {
  position: relative;
  display: inline-block;
}



.nav-menu a {
  display: block;
  text-decoration: none;
  color: var(--light-text);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0 1.25rem;
  height: 50px;
  line-height: 50px;
  transition: var(--transition);
  margin: 10px 0;
  white-space: nowrap;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 8px;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  border-radius: 2px;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-menu a:hover::after {
  width: 100%;
}

body.dark-mode .nav-menu a {
  color: var(--dark-text);
}

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

.nav-menu .current-menu-item a,
.nav-menu .current-menu-parent a,
.nav-menu .current-post-ancestor a,
.nav-menu .current-post-parent a {
  color: var(--primary-color);
}

.nav-menu .current-menu-item a::after,
.nav-menu .current-menu-parent a::after,
.nav-menu .current-post-ancestor a::after,
.nav-menu .current-post-parent a::after {
  width: 100%;
}

/* Submenu Styles */
.nav-menu .sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--light-surface);
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  padding: 12px 0;
  min-width: 200px;
  z-index: 1000;
  display: none;
}

body.dark-mode .nav-menu .sub-menu {
  background: var(--dark-surface);
}

.nav-menu .menu-item-has-children:hover > .sub-menu {
  display: block;
}

.nav-menu .sub-menu li {
  position: relative;
}

.nav-menu .sub-menu a {
  padding: 12px 20px;
  height: auto;
  line-height: 1.5;
  margin: 0;
  border-radius: 0;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--light-text);
  transition: var(--transition);
}

body.dark-mode .nav-menu .sub-menu a {
  color: var(--dark-text);
}

.nav-menu .sub-menu a:hover {
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary-color);
  transform: none;
  box-shadow: none;
}

body.dark-mode .nav-menu .sub-menu a:hover {
  background: rgba(37, 99, 235, 0.2);
}

/* Nested Submenu */
.nav-menu .sub-menu .sub-menu {
  left: 100%;
  top: 0;
}

.nav-menu .sub-menu .menu-item-has-children:hover > .sub-menu {
  display: block;
}

body.dark-mode .nav-menu a:hover {
  color: var(--primary-color);
}

/* Theme Toggle */
.theme-toggle {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

body.dark-mode .theme-toggle {
  background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
}

body.dark-mode .theme-toggle:hover {
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
}

.toggle-icon {
  font-size: 1.25rem;
  line-height: 1;
}

/* ===== Mobile Menu ===== */
.mobile-menu-toggle {
  display: none;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: white;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

body.dark-mode .mobile-menu-toggle {
  background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.mobile-menu-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
}

/* ===== Hero Section ===== */
.hero {
  padding: 4rem 0;
  text-align: center;
  background: linear-gradient(180deg, var(--light-bg) 0%, var(--light-surface) 100%);
  border-bottom: 1px solid var(--gray-light);
}

body.dark-mode .hero {
  background: linear-gradient(180deg, var(--dark-bg) 0%, var(--dark-surface) 100%);
  border-bottom-color: var(--gray-dark);
}

.hero h1 {
  font-size: 2.75rem;
  font-weight: 900;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
}

body.dark-mode .hero h1 {
  background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.1rem;
  color: var(--gray-medium);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Layout Structure ===== */
.layout-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

/* Sidebar */
.sidebar {
  background: var(--light-surface);
  border-bottom: 1px solid var(--gray-light);
  padding: 2rem;
}

body.dark-mode .sidebar {
  background: var(--dark-surface);
  border-bottom-color: var(--gray-dark);
}

.sidebar-widget {
  margin-bottom: 2rem;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(16, 185, 129, 0.05) 100%);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

body.dark-mode .sidebar-widget {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
}

.sidebar-widget:last-child {
  margin-bottom: 0;
}

.sidebar-widget h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--light-text);
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

body.dark-mode .sidebar-widget h3 {
  color: var(--dark-text);
}

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

.sidebar-widget ul li {
  margin-bottom: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--gray-light);
}

body.dark-mode .sidebar-widget ul li {
  border-bottom-color: var(--gray-dark);
}

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

.sidebar-widget ul li a {
  color: var(--light-text);
  text-decoration: none;
  font-size: 0.95rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

body.dark-mode .sidebar-widget ul li a {
  color: var(--dark-text);
}

.sidebar-widget ul li a::before {
  content: '→';
  color: var(--primary-color);
  font-size: 0.85rem;
}

.sidebar-widget ul li a:hover {
  color: var(--primary-color);
  transform: translateX(4px);
}

/* Author Info Widget */
.author-info-widget {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.author-info-widget .author-avatar img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px solid var(--primary-color);
}

.author-info-widget .author-bio h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--light-text);
}

body.dark-mode .author-info-widget .author-bio h4 {
  color: var(--dark-text);
}

.author-info-widget .author-bio p {
  font-size: 0.9rem;
  color: var(--gray-medium);
  line-height: 1.6;
}

/* Main Content */
.main-content {
  padding: 2rem 0;
}

/* ===== Blog List (Non-card style) ===== */
.blog-list {
  padding: 0;
}

.blog-list article {
  padding: 2rem 0;
  border-bottom: 1px solid var(--gray-light);
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 2rem;
  align-items: start;
}

body.dark-mode .blog-list article {
  border-bottom-color: var(--gray-dark);
}

.blog-list article:first-child {
  border-top: 1px solid var(--gray-light);
}

body.dark-mode .blog-list article:first-child {
  border-top-color: var(--gray-dark);
}

.blog-list-thumbnail {
  aspect-ratio: 16/10;
  border-radius: 8px;
  overflow: hidden;
  background: var(--gray-light);
}

.blog-list-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

body.dark-mode .blog-list-thumbnail {
  background: var(--gray-dark);
}



.blog-list-content {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.blog-list-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.blog-list-title {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.4;
}

.blog-list-title a {
  text-decoration: none;
  color: var(--light-text);
  transition: color 0.2s ease;
}

body.dark-mode .blog-list-title a {
  color: var(--dark-text);
}

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

.blog-list-excerpt {
  color: var(--gray-medium);
  font-size: 0.95rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-list-meta {
  display: flex;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--gray-medium);
  margin-top: 0.5rem;
}

.blog-list-meta span {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 3rem 0;
}

.pagination a,
.pagination span {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  text-decoration: none;
  color: var(--gray-medium);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.pagination a {
  background: var(--light-surface);
  border: 1px solid var(--gray-light);
}

body.dark-mode .pagination a {
  background: var(--dark-surface);
  border-color: var(--gray-dark);
}

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

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

/* ===== Footer ===== */
footer {
  background-color: var(--dark-surface);
  padding: 3rem 0 1.5rem;
  margin-top: 4rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-column h3 {
  color: white;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.footer-column ul {
  list-style: none;
}

.footer-column ul li {
  margin-bottom: 0.5rem;
}

.footer-column ul li a {
  color: var(--gray-medium);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-column ul li a:hover {
  color: var(--primary-color);
}

.footer-bottom {
  border-top: 1px solid var(--gray-dark);
  padding-top: 1.5rem;
  text-align: center;
  color: var(--gray-medium);
  font-size: 0.85rem;
}

/* ===== Responsive Design ===== */

/* Mobile (default) */
@media (max-width: 767px) {
  .nav-wrapper {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .hero h1 {
    font-size: 1.75rem;
  }
  
  .blog-list article {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .blog-list-thumbnail {
    aspect-ratio: 16/9;
  }
  
  .blog-list-title {
    font-size: 1.25rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* Medium screens (Tablet) */
@media (min-width: 768px) {
  .layout-container {
    grid-template-columns: 300px 1fr;
    gap: 2rem;
  }
  
  .sidebar {
    border-right: 1px solid var(--gray-light);
    border-bottom: none;
    padding: 1.5rem;
  }
  
  body.dark-mode .sidebar {
    border-right-color: var(--gray-dark);
  }
  
  .main-content {
    padding: 2rem 0;
  }
}

/* Large screens (Desktop) */
@media (min-width: 1200px) {
  .layout-container {
    grid-template-columns: 300px 1fr 300px;
    gap: 2rem;
  }
  
  .sidebar-right {
    border-left: 1px solid var(--gray-light);
    border-right: none;
  }
  
  body.dark-mode .sidebar-right {
    border-left-color: var(--gray-dark);
  }
}

/* ===== Single Post ===== */
.single-post {
  padding: 3rem 0;
}

.entry-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.entry-title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.entry-meta {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  color: var(--gray-medium);
  font-size: 0.9rem;
}

.post-thumbnail {
  margin-bottom: 2rem;
  border-radius: 8px;
  overflow: hidden;
}

.post-thumbnail img {
  width: 100%;
  height: auto;
}

.entry-content {
  font-size: 1.05rem;
  line-height: 1.8;
  max-width: 720px;
  margin: 0 auto;
}

.entry-content p {
  margin-bottom: 1.25rem;
}

.entry-content h2,
.entry-content h3 {
  margin: 2rem 0 1rem;
  font-weight: 700;
}

/* Author Info */
.author-info {
  background: var(--gray-light);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 2.5rem 0;
  display: flex;
  gap: 1rem;
}

body.dark-mode .author-info {
  background: var(--dark-bg);
}

.author-avatar img {
  width: 60px;
  height: 60px;
  border-radius: 50%;
}

.author-bio h4 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.author-bio p {
  font-size: 0.9rem;
  color: var(--gray-medium);
}

/* Related Posts */
.related-posts {
  margin-top: 3rem;
}

.related-posts h3 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.related-post {
  background: var(--light-surface);
  border-radius: 8px;
  overflow: hidden;
}

body.dark-mode .related-post {
  background: var(--dark-bg);
}

.related-post img {
  width: 100%;
  height: 120px;
  object-fit: cover;
}

.related-post-content {
  padding: 1rem;
}

.related-post h4 {
  font-size: 0.95rem;
  line-height: 1.4;
}

.related-post h4 a {
  text-decoration: none;
  color: var(--light-text);
}

body.dark-mode .related-post h4 a {
  color: var(--dark-text);
}

@media (max-width: 767px) {
  .related-posts-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Archive Header ===== */
.archive-header {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--gray-light);
}

body.dark-mode .archive-header {
  border-bottom-color: var(--gray-dark);
}

.archive-title {
  font-size: 1.75rem;
  font-weight: 700;
}

.archive-description {
  color: var(--gray-medium);
  margin-top: 0.5rem;
}

/* ===== 404 Page ===== */
.error-404 {
  text-align: center;
  padding: 5rem 0;
}

.error-404 .page-title {
  font-size: 6rem;
  font-weight: 800;
  color: var(--gray-light);
}

body.dark-mode .error-404 .page-title {
  color: var(--gray-dark);
}

.error-404 .page-content {
  max-width: 400px;
  margin: 0 auto;
  color: var(--gray-medium);
}

.search-form {
  margin: 1.5rem 0;
}

.search-form input {
  padding: 0.75rem 1rem;
  border: 1px solid var(--gray-light);
  border-radius: 6px;
  font-size: 0.95rem;
  width: 100%;
  max-width: 300px;
}

body.dark-mode .search-form input {
  background: var(--dark-surface);
  border-color: var(--gray-dark);
  color: var(--dark-text);
}

.search-form input:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}