/* ==========================================
   BuilderNews - 现代化样式表
   ========================================== */

/* 基础重置和变量 */
:root {
  /* 颜色系统 */
  --primary-orange: #ff6600;
  --primary-orange-light: #ff8533;
  --primary-orange-dark: #e65c00;
  --text-primary: #2c3e50;
  --text-secondary: #7f8c8d;
  --text-light: #95a5a6;
  --bg-primary: #f8f9fa;
  --bg-card: #ffffff;
  --border-color: #e1e8ed;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

  /* 间距系统 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* 字体系统 */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;

  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
}

/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ==========================================
   顶部导航栏
   ========================================== */

.header {
  background: linear-gradient(135deg, var(--primary-orange) 0%, var(--primary-orange-light) 100%);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  gap: var(--spacing-lg);
}

/* Logo 区域 */
.logo-section {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

.logo-image {
  height: 32px;
  width: auto;
  display: block;
}

.site-name {
  font-size: 18px;
  font-weight: 700;
  color: white;
  letter-spacing: -0.5px;
}

/* 导航链接 */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex: 1;
}

.nav-link {
  color: rgba(255, 255, 255, 0.9);
  font-size: 14px;
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover {
  color: white;
  background-color: rgba(255, 255, 255, 0.15);
}

.nav-link.active {
  color: white;
  background-color: rgba(255, 255, 255, 0.2);
  font-weight: 600;
}

/* 搜索和用户区域 */
.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-shrink: 0;
}

.search-container {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 12px;
  color: rgba(255, 255, 255, 0.7);
  pointer-events: none;
}

.search-input {
  width: 220px;
  height: 36px;
  padding: 0 36px 0 36px;
  background-color: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  color: white;
  font-size: 14px;
  transition: all var(--transition-base);
}

.search-input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.search-input:focus {
  outline: none;
  background-color: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
  width: 280px;
}

.search-clear {
  position: absolute;
  right: 10px;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.search-clear:hover {
  background-color: rgba(255, 255, 255, 0.2);
  color: white;
}

.user-link {
  color: white;
  font-size: 14px;
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-md);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.user-link:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.6);
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--spacing-xs);
  width: 36px;
  height: 36px;
  justify-content: center;
  align-items: center;
}

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: white;
  border-radius: 2px;
  transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ==========================================
   主内容区
   ========================================== */

.main-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md);
  min-height: calc(100vh - 200px);
}

.content-container {
  background-color: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

/* 新闻列表 */
.news-list {
  padding: var(--spacing-sm) var(--spacing-md);
}

.news-item {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  margin-bottom: 2px;
  border-bottom: 1px solid transparent;
}

.news-item:hover {
  background-color: var(--bg-primary);
  border-bottom-color: var(--border-color);
}

/* 排名和点赞区域 */
.news-rank-vote {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  flex-shrink: 0;
  width: 40px;
}

.news-rank {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 600;
  font-family: var(--font-mono);
}

.vote-btn {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  transition: all var(--transition-fast);
  border-radius: var(--radius-sm);
}

.vote-btn:hover {
  color: var(--primary-orange);
  background-color: rgba(255, 102, 0, 0.1);
  transform: translateY(-2px);
}

.vote-btn.voted {
  color: var(--primary-orange);
}

.vote-btn svg {
  width: 16px;
  height: 16px;
}

/* 新闻内容 */
.news-content {
  flex: 1;
  min-width: 0;
}

.news-title-row {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  margin-bottom: 2px;
  flex-wrap: wrap;
}

.news-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
  transition: color var(--transition-fast);
}

.news-title:hover {
  color: var(--primary-orange);
}

.news-domain {
  font-size: 12px;
  color: var(--text-light);
  font-family: var(--font-mono);
}

.news-domain::before {
  content: '(';
}

.news-domain::after {
  content: ')';
}

/* 新闻元数据 */
.news-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 12px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.news-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.news-meta-separator {
  color: var(--border-color);
}

.news-meta a {
  transition: color var(--transition-fast);
}

.news-meta a:hover {
  color: var(--primary-orange);
}

/* 搜索高亮 */
.highlight {
  background-color: rgba(255, 102, 0, 0.2);
  padding: 2px 4px;
  border-radius: 2px;
  font-weight: 600;
}

/* 无结果提示 */
.no-results {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
}

.no-results svg {
  margin-bottom: var(--spacing-md);
}

.no-results h3 {
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.no-results p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* 加载更多 */
.load-more-container {
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  border-top: 1px solid var(--border-color);
}

.load-more-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--primary-orange);
  color: white;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.load-more-btn:hover {
  background-color: var(--primary-orange-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.load-more-btn:active {
  transform: translateY(0);
}

/* ==========================================
   底部
   ========================================== */

.footer {
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
  margin-top: var(--spacing-xl);
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
}

.footer-link {
  font-size: 13px;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--primary-orange);
}

.footer-separator {
  color: var(--border-color);
  font-size: 12px;
}

.footer-info {
  font-size: 12px;
  color: var(--text-light);
}

/* ==========================================
   响应式设计 - 平板
   ========================================== */

@media (max-width: 1024px) {
  .header-container {
    padding: 0 var(--spacing-md);
  }

  .search-input {
    width: 180px;
  }

  .search-input:focus {
    width: 220px;
  }

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

  .nav-link {
    font-size: 13px;
    padding: var(--spacing-xs);
  }
}

/* ==========================================
   响应式设计 - 移动端
   ========================================== */

@media (max-width: 768px) {
  /* 顶部导航 */
  .header-container {
    height: 56px;
    padding: 0 var(--spacing-md);
  }

  .logo-image {
    height: 28px;
  }

  .site-name {
    font-size: 16px;
  }

  /* 隐藏桌面端导航 */
  .nav-links {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--primary-orange-light) 100%);
    flex-direction: column;
    align-items: stretch;
    padding: var(--spacing-md);
    gap: 0;
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: 15px;
  }

  /* 搜索区域 */
  .header-right {
    gap: var(--spacing-sm);
  }

  .search-container {
    flex: 1;
    max-width: 200px;
  }

  .search-input {
    width: 100%;
    font-size: 13px;
    height: 32px;
    padding: 0 32px 0 32px;
  }

  .search-input:focus {
    width: 100%;
  }

  .search-icon {
    left: 10px;
  }

  .user-link {
    font-size: 13px;
    padding: 6px var(--spacing-md);
  }

  /* 显示汉堡菜单 */
  .hamburger {
    display: flex;
  }

  /* 主内容 */
  .main-content {
    padding: var(--spacing-md) var(--spacing-sm);
  }

  .news-list {
    padding: var(--spacing-sm);
  }

  .news-item {
    padding: var(--spacing-md) var(--spacing-sm);
    gap: var(--spacing-sm);
  }

  .news-rank-vote {
    width: 32px;
  }

  .news-rank {
    font-size: 12px;
  }

  .vote-btn {
    width: 32px;
    height: 32px;
  }

  .vote-btn svg {
    width: 18px;
    height: 18px;
  }

  .news-title {
    font-size: 15px;
  }

  .news-domain {
    font-size: 11px;
  }

  .news-meta {
    font-size: 12px;
  }

  /* 底部 */
  .footer-links {
    font-size: 12px;
  }

  .footer-info {
    font-size: 11px;
  }
}

/* 超小屏幕优化 */
@media (max-width: 375px) {
  .site-name {
    display: none;
  }

  .search-container {
    max-width: 140px;
  }

  .user-link {
    padding: 6px var(--spacing-sm);
  }

  .news-title {
    font-size: 14px;
  }
}

/* ==========================================
   打印样式
   ========================================== */

@media print {
  .header,
  .footer,
  .vote-btn,
  .load-more-container {
    display: none;
  }

  .news-item {
    page-break-inside: avoid;
  }
}

/* ==========================================
   辅助功能
   ========================================== */

/* 键盘焦点样式 */
*:focus-visible {
  outline: 2px solid var(--primary-orange);
  outline-offset: 2px;
}

/* 减少动画（用户偏好） */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
  :root {
    --text-primary: #000000;
    --text-secondary: #333333;
    --border-color: #000000;
  }
}

/* ==========================================
   模态框
   ========================================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  padding: var(--spacing-md);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 480px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
}

/* 表单样式 */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

/* Google 登录区域 */
.google-signin-section {
  margin-bottom: var(--spacing-lg);
}

.google-signin-section #g_id_onload {
  display: block;
}

.google-signin-section .g_id_signin {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-md);
}

.divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: var(--spacing-lg) 0;
  color: var(--text-secondary);
  font-size: 14px;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border-color);
}

.divider span {
  padding: 0 var(--spacing-md);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--text-primary);
  background-color: var(--bg-card);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-orange);
  box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-error {
  font-size: 12px;
  color: #e74c3c;
  margin-top: var(--spacing-xs);
}

.form-hint {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

/* 按钮样式 */
.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  font-family: inherit;
}

.btn-primary {
  background-color: var(--primary-orange);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--primary-orange-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

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

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==========================================
   评论系统
   ========================================== */

.comments-section {
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-md);
  background-color: var(--bg-primary);
}

.comments-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.comments-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.comments-count {
  font-size: 14px;
  color: var(--text-secondary);
}

/* 评论输入框 */
.comment-form {
  margin-bottom: var(--spacing-lg);
  background-color: var(--bg-card);
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.comment-textarea {
  width: 100%;
  min-height: 80px;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--text-primary);
  resize: vertical;
  transition: all var(--transition-fast);
}

.comment-textarea:focus {
  outline: none;
  border-color: var(--primary-orange);
  box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.1);
}

.comment-form-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  justify-content: flex-end;
}

/* 评论列表 */
.comments-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.comment-item {
  background-color: var(--bg-card);
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.comment-item.reply {
  margin-left: var(--spacing-xl);
  border-left: 2px solid var(--primary-orange);
}

.comment-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.comment-author {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.comment-time {
  font-size: 12px;
  color: var(--text-secondary);
}

.comment-body {
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
}

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

.comment-action {
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.comment-action:hover {
  color: var(--primary-orange);
}

.comment-vote {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.comment-vote-btn {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  transition: all var(--transition-fast);
  border-radius: var(--radius-sm);
}

.comment-vote-btn:hover {
  color: var(--primary-orange);
  background-color: rgba(255, 102, 0, 0.1);
}

.comment-vote-btn.voted {
  color: var(--primary-orange);
}

.comment-vote-count {
  font-size: 12px;
  color: var(--text-secondary);
  min-width: 20px;
  text-align: center;
}

/* 回复表单 */
.reply-form {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

/* 展开/收起评论 */
.comment-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.comment-toggle:hover {
  color: var(--primary-orange);
}

.comment-toggle svg {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-fast);
}

.comment-toggle.collapsed svg {
  transform: rotate(-90deg);
}

/* ==========================================
   个人设置
   ========================================== */

/* 设置按钮 */
.settings-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background-color: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-sm);
  color: white;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.settings-btn:hover {
  background-color: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
}

.settings-btn svg {
  display: block;
}

/* 设置表格 */
.settings-table {
  width: 100%;
  border-collapse: collapse;
}

.settings-table td {
  padding: var(--spacing-md) 0;
  vertical-align: middle;
}

.settings-table td:first-child {
  width: 100px;
  color: var(--text-secondary);
  font-size: 14px;
  text-align: right;
  padding-right: var(--spacing-md);
}

.settings-textarea {
  width: 100%;
  min-height: 100px;
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  color: var(--text-primary);
  resize: vertical;
  transition: border-color var(--transition-fast);
}

.settings-textarea:focus {
  outline: none;
  border-color: var(--primary-orange);
}