/* 
 * 轻论坛 - 响应式样式
 * 针对不同设备尺寸的响应式设计
 */

/* 平板设备 (最大宽度为 768px) */
@media screen and (max-width: 768px) {
  .container {
    padding: 0 10px;
  }

  .header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .logo {
    margin-bottom: 15px;
  }

  .nav ul {
    width: 100%;
    justify-content: space-around;
  }

  .nav ul li {
    margin: 0 5px;
  }

  .mobile-menu-toggle {
    display: flex;
    position: absolute;
    right: 15px;
    top: 20px;
  }

  .nav {
    display: none;
    width: 100%;
    margin-top: 15px;
  }

  .nav.active {
    display: block;
  }

  .nav ul {
    flex-direction: column;
    align-items: center;
  }

  .nav ul li {
    margin: 5px 0;
    width: 100%;
    text-align: center;
  }

  .nav ul li a {
    display: block;
    padding: 10px;
  }

  .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-top: 5px;
  }

  .welcome-banner h2 {
    font-size: 2rem;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

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

  .user-center-container {
    flex-direction: column;
  }

  .sidebar {
    flex: none;
  }

  .post-meta {
    flex-direction: column;
    gap: 5px;
  }

  .post-stats {
    flex-direction: column;
    gap: 5px;
  }

  .post-detail {
    padding: 20px;
  }

  .post-meta-detail {
    flex-direction: column;
    gap: 5px;
  }

  .comment-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .comment-date {
    margin-left: 0;
    margin-top: 5px;
  }

  .comment-content,
  .reply-form {
    padding-left: 0;
  }

  .replies {
    padding-left: 20px;
  }

  .form-actions {
    flex-direction: column;
  }
}

/* 小型平板 (最大宽度为 600px) */
@media screen and (max-width: 600px) {
  .welcome-banner {
    padding: 40px 20px;
  }

  .welcome-banner h2 {
    font-size: 1.8rem;
  }

  .auth-container {
    margin: 20px 15px;
    padding: 20px;
  }

  .post-card {
    padding: 15px;
  }

  .section h3 {
    font-size: 1.5rem;
  }

  .page-header {
    flex-direction: column;
    align-items: stretch;
  }

  .page-header button {
    width: 100%;
    margin-top: 15px;
  }

  .post-detail-container {
    padding: 0 10px;
  }
}

/* 手机设备 (最大宽度为 480px) */
@media screen and (max-width: 480px) {
  .header .container {
    padding: 10px 10px 15px;
  }

  .logo h1 a {
    font-size: 1.5rem;
  }

  .welcome-banner h2 {
    font-size: 1.5rem;
  }

  .welcome-banner p {
    font-size: 1rem;
  }

  .btn-primary {
    padding: 10px 20px;
    font-size: 0.95rem;
  }

  .section h3 {
    font-size: 1.3rem;
  }

  .post-card h4 {
    font-size: 1.1rem;
  }

  .comment-header img {
    width: 35px;
    height: 35px;
  }

  .comment-content {
    padding-left: 0;
  }

  .replies {
    padding-left: 10px;
  }

  .pagination {
    gap: 5px;
  }

  .pagination a,
  .pagination span {
    padding: 6px 12px;
    font-size: 0.9rem;
  }

  .form-group input,
  .form-group textarea,
  .form-group select {
    padding: 10px;
  }

  .tab-content {
    padding: 15px;
  }

  .user-center-container {
    margin: 10px 0;
  }
}

/* 大屏设备优化 (最小宽度为 1200px) */
@media screen and (min-width: 1200px) {
  .container {
    max-width: 1400px;
  }

  .welcome-banner h2 {
    font-size: 3rem;
  }

  .category-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .user-center-container {
    max-width: 1200px;
    margin: 0 auto;
  }
}

/* 横向手机设备 */
@media screen and (max-height: 500px) and (orientation: landscape) {
  .main-content {
    padding: 20px 0;
  }

  .welcome-banner {
    padding: 30px 0;
  }

  .welcome-banner h2 {
    font-size: 1.5rem;
  }

  .section {
    margin-bottom: 30px;
  }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
  :root {
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --border-color: #000;
  }

  body {
    background-color: #fff;
  }
}

/* 深色模式 */
@media (prefers-color-scheme: dark) {
  :root {
    --light-bg: #121212;
    --text-dark: #f0f0f0;
    --text-gray: #aaa;
    --white: #1e1e1e;
    --border-color: #333;
  }

  body {
    background-color: #121212;
    color: #f0f0f0;
  }

  .header {
    background-color: #1e1e1e;
  }

  .nav ul li a:hover,
  .nav ul li a.active {
    background-color: rgba(74, 144, 226, 0.2);
  }

  .dropdown {
    background-color: #1e1e1e;
  }

  .section h3::after {
    background-color: #5faae3;
  }

  .auth-container {
    background-color: #1e1e1e;
  }

  .user-nav ul li a:hover,
  .user-nav ul li a.active {
    background-color: rgba(74, 144, 226, 0.2);
  }

  .pagination a,
  .pagination span {
    background-color: #1e1e1e;
    border: 1px solid #333;
  }

  .post-content {
    color: #f0f0f0;
  }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}