:root {
  --primary-bg: #ffffff;
  --secondary-bg: #f8f9fa;
  --text-primary: #2d3436;
  --text-secondary: #636e72;
  --accent-orange: #e67e22;
  --accent-green: #27ae60;
  --border-color: #dfe6e9;
  --card-bg: #ffffff;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
  --primary-bg: #1a1a2e;
  --secondary-bg: #16213e;
  --text-primary: #eaeaea;
  --text-secondary: #b2bec3;
  --border-color: #2d3436;
  --card-bg: #1e2a3a;
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--primary-bg);
  color: var(--text-primary);
  line-height: 1.6;
  transition: var(--transition);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

header {
  background-color: var(--card-bg);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  position: relative;
}

.logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--accent-orange);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 15px;
  transition: var(--transition);
  padding: 8px 0;
}

.nav-links a:hover {
  color: var(--accent-orange);
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 20px;
  padding: 8px;
  color: var(--text-primary);
}

.music-control {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.music-control button {
  background: var(--accent-orange);
  border: none;
  color: white;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
}

.music-control button:hover {
  opacity: 0.9;
}

.hero {
  background-color: var(--secondary-bg);
  padding: 80px 0;
  text-align: center;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 24px;
}

.hero-music {
  margin-top: 24px;
}

.hero-music audio {
  max-width: 400px;
  width: 100%;
}

.section {
  padding: 60px 0;
}

.section-title {
  font-size: 32px;
  text-align: center;
  margin-bottom: 40px;
  color: var(--text-primary);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.about-card {
  background-color: var(--card-bg);
  padding: 32px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.about-card:hover {
  transform: translateY(-4px);
}

.about-card h3 {
  color: var(--accent-orange);
  margin-bottom: 16px;
  font-size: 20px;
}

.about-card p {
  color: var(--text-secondary);
  font-size: 15px;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 32px;
}

.article-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-4px);
}

.article-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.article-content {
  padding: 24px;
}

.article-category {
  display: inline-block;
  background-color: var(--accent-green);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  margin-bottom: 12px;
}

.article-title {
  font-size: 20px;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.article-meta {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.article-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.btn {
  display: inline-block;
  background-color: var(--accent-orange);
  color: white;
  padding: 12px 32px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 15px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--accent-orange);
  color: var(--accent-orange);
}

.load-more {
  text-align: center;
  margin-top: 40px;
}

.sidebar {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
}

.pinned-articles {
  background-color: var(--card-bg);
  padding: 24px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin-bottom: 32px;
}

.pinned-articles h3 {
  color: var(--accent-orange);
  margin-bottom: 20px;
  font-size: 20px;
}

.pinned-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
}

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

.pinned-item h4 {
  color: var(--text-primary);
  margin-bottom: 8px;
}

.pinned-item p {
  font-size: 13px;
  color: var(--text-secondary);
}

.recent-articles h3 {
  color: var(--accent-green);
  margin-bottom: 20px;
  font-size: 20px;
}

.recent-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
}

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

.recent-item img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 8px;
}

.recent-item-content h4 {
  color: var(--text-primary);
  font-size: 16px;
  margin-bottom: 8px;
}

.recent-item-content p {
  font-size: 13px;
  color: var(--text-secondary);
}

footer {
  background-color: var(--secondary-bg);
  padding: 40px 0;
  text-align: center;
  margin-top: 60px;
}

footer p {
  color: var(--text-secondary);
  font-size: 14px;
}

.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--secondary-bg);
}

.login-box {
  background-color: var(--card-bg);
  padding: 48px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 400px;
}

.login-box h2 {
  text-align: center;
  margin-bottom: 32px;
  color: var(--text-primary);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-primary);
  font-size: 14px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
  background-color: var(--primary-bg);
  color: var(--text-primary);
  transition: var(--transition);
}

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

.admin-tabs {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 16px;
}

.admin-tab {
  padding: 12px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 15px;
  color: var(--text-secondary);
  transition: var(--transition);
  border-radius: 8px;
}

.admin-tab.active {
  background-color: var(--accent-orange);
  color: white;
}

.admin-content {
  background-color: var(--card-bg);
  padding: 32px;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.table th {
  color: var(--text-primary);
  font-weight: 600;
}

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

.table-actions {
  display: flex;
  gap: 8px;
}

.table-actions button {
  padding: 6px 12px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
}

.table-actions .edit-btn {
  background-color: var(--accent-green);
  color: white;
}

.table-actions .delete-btn {
  background-color: #e74c3c;
  color: white;
}

.editor-toolbar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.toolbar-btn {
  padding: 8px 12px;
  background-color: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-primary);
  transition: var(--transition);
}

.toolbar-btn:hover {
  background-color: var(--accent-orange);
  color: white;
  border-color: var(--accent-orange);
}

.media-upload {
  border: 2px dashed var(--border-color);
  padding: 32px;
  text-align: center;
  border-radius: 8px;
  margin-top: 16px;
  cursor: pointer;
  transition: var(--transition);
}

.media-upload:hover {
  border-color: var(--accent-orange);
}

.media-upload input {
  display: none;
}

.media-preview {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 12px;
}

.preview-item {
  position: relative;
  padding-top: 100%;
  background-color: var(--secondary-bg);
  border-radius: 8px;
  overflow: hidden;
}

.preview-item img,
.preview-item video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.preview-item audio {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
}

.preview-item .remove-btn {
  position: absolute;
  top: 4px;
  right: 4px;
  background-color: #e74c3c;
  color: white;
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  cursor: pointer;
  font-size: 12px;
}

.tag-input {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  min-height: 48px;
  align-items: center;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background-color: var(--accent-green);
  color: white;
  padding: 4px 12px;
  border-radius: 16px;
  font-size: 13px;
}

.tag-item button {
  background: none;
  border: none;
  color: white;
  cursor: pointer;
  font-size: 14px;
  padding: 0;
}

.tag-item button:hover {
  opacity: 0.7;
}

.tag-input input {
  flex: 1;
  min-width: 120px;
  border: none;
  background: none;
  padding: 4px;
  font-size: 14px;
  color: var(--text-primary);
  outline: none;
}

.hidden {
  display: none;
}

.notification {
  position: fixed;
  top: 80px;
  right: 24px;
  padding: 16px 24px;
  background-color: var(--accent-green);
  color: white;
  border-radius: 8px;
  box-shadow: var(--shadow);
  z-index: 2000;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.category-tag {
  display: inline-block;
  background-color: var(--secondary-bg);
  color: var(--text-primary);
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 13px;
  margin-right: 8px;
  margin-bottom: 8px;
}

.category-tag.selected {
  background-color: var(--accent-orange);
  color: white;
}

.category-tag:hover {
  cursor: pointer;
  opacity: 0.8;
}

.article-view {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 24px;
}

.article-view h1 {
  font-size: 36px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.article-view .article-info {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.article-view .article-body {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-view .article-body p {
  margin-bottom: 16px;
}

.article-view .article-body img {
  max-width: 100%;
  border-radius: 8px;
  margin: 24px 0;
}

.article-view .article-body video,
.article-view .article-body audio {
  max-width: 100%;
  border-radius: 8px;
  margin: 24px 0;
}

.back-link {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--accent-orange);
  text-decoration: none;
  font-size: 14px;
}

.back-link:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .nav {
    padding: 12px 0;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--card-bg);
    flex-direction: column;
    gap: 0;
    padding: 16px 0;
    box-shadow: var(--shadow);
    z-index: 999;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    width: 100%;
    text-align: center;
  }

  .nav-links a {
    display: block;
    padding: 12px 16px;
    width: 100%;
  }

  .mobile-menu-btn {
    display: flex;
  }

  #articlesLayout {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }

  #articlesLayout .sidebar {
    max-height: none;
  }

  #articlesLayout #articlesList {
    max-height: 300px;
  }

  .hero {
    padding: 48px 0;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero p {
    font-size: 16px;
    padding: 0 16px;
  }

  .section {
    padding: 40px 0;
  }

  .section-title {
    font-size: 24px;
    margin-bottom: 24px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .about-card {
    padding: 24px;
  }

  .sidebar {
    grid-template-columns: 1fr;
  }

  .articles-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .article-card img {
    height: 180px;
  }

  .article-content {
    padding: 16px;
  }

  .article-title {
    font-size: 18px;
  }

  .login-box {
    margin: 16px;
    padding: 24px;
  }

  .admin-tabs {
    flex-wrap: wrap;
    gap: 8px;
  }

  .admin-tab {
    padding: 10px 16px;
    font-size: 14px;
  }

  .admin-content {
    padding: 20px;
  }

  .table {
    display: block;
    overflow-x: auto;
  }

  .table th,
  .table td {
    padding: 12px 8px;
    font-size: 13px;
  }

  .table-actions {
    flex-direction: column;
    gap: 4px;
  }

  .table-actions button {
    padding: 4px 8px;
    font-size: 12px;
  }

  .article-view {
    padding: 24px 16px;
  }

  .article-view h1 {
    font-size: 24px;
  }

  .article-view .article-body {
    font-size: 15px;
  }

  .editor-toolbar {
    gap: 4px;
  }

  .toolbar-btn {
    padding: 6px 8px;
    font-size: 12px;
  }

  .tag-input {
    padding: 6px;
  }

  .tag-item {
    padding: 2px 8px;
    font-size: 12px;
  }

  .form-group input,
  .form-group textarea,
  .form-group select {
    padding: 10px 12px;
    font-size: 14px;
  }

  .btn {
    padding: 10px 24px;
    font-size: 14px;
  }

  .music-control {
    flex-wrap: wrap;
    justify-content: center;
  }

  .category-tag {
    padding: 4px 10px;
    font-size: 12px;
    margin-right: 6px;
    margin-bottom: 6px;
  }

  footer {
    padding: 24px 0;
    margin-top: 40px;
  }

  footer p {
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 24px;
  }

  .hero {
    padding: 32px 0;
  }

  .section-title {
    font-size: 20px;
  }

  .about-card h3 {
    font-size: 18px;
  }

  .about-card p {
    font-size: 14px;
  }

  .article-card img {
    height: 150px;
  }

  .article-title {
    font-size: 16px;
  }

  .article-excerpt {
    font-size: 13px;
  }

  .login-box {
    padding: 20px;
  }

  .login-box h2 {
    font-size: 20px;
    margin-bottom: 24px;
  }

  .admin-content {
    padding: 16px;
  }

  .toolbar-btn {
    padding: 5px 6px;
    font-size: 11px;
  }

  .preview-item {
    padding-top: 80%;
  }
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}