/**
 * ============================================================
 *  FreeGame Hub - 暗黑游戏风格样式
 * ============================================================
 */

/* ==================== CSS 变量 ==================== */
:root {
  /* 基础色 */
  --bg-primary: #0a0a1a;
  --bg-secondary: #111128;
  --bg-card: #161630;
  --bg-card-hover: #1c1c3a;
  --bg-elevated: #1e1e40;

  /* 文字色 */
  --text-primary: #e8e8f0;
  --text-secondary: #9999b8;
  --text-muted: #6666888;

  /* 霓虹渐变色 */
  --neon-purple: #a855f7;
  --neon-blue: #3b82f6;
  --neon-cyan: #06b6d4;
  --neon-pink: #ec4899;
  --neon-green: #22c55e;
  --neon-orange: #f97316;

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #a855f7, #3b82f6, #06b6d4);
  --gradient-card: linear-gradient(145deg, rgba(168, 85, 247, 0.1), rgba(59, 130, 246, 0.05));
  --gradient-glow: linear-gradient(135deg, rgba(168, 85, 247, 0.3), rgba(6, 182, 212, 0.3));

  /* 边框 */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(168, 85, 247, 0.3);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* 阴影 */
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 8px 40px rgba(168, 85, 247, 0.2);
  --shadow-modal: 0 20px 60px rgba(0, 0, 0, 0.7);

  /* 动画 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ==================== 全局重置 ==================== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--neon-cyan);
}

::selection {
  background: rgba(168, 85, 247, 0.3);
  color: white;
}

/* ==================== 容器 ==================== */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ==================== 滚动条 ==================== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: rgba(168, 85, 247, 0.3);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(168, 85, 247, 0.5);
}

/* ==================== 头部导航 ==================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: default;
  user-select: none;
}

.logo-icon {
  font-size: 1.6rem;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.logo-highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn-github {
  color: var(--text-secondary);
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-github:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

/* ==================== Hero 区域 ==================== */
.hero {
  text-align: center;
  padding: 60px 0 40px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 32px;
}

/* ==================== 搜索栏 ==================== */
.search-wrapper {
  position: relative;
  max-width: 600px;
  margin: 0 auto 12px;
}

.search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 16px 48px 16px 50px;
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  outline: none;
  transition: all var(--transition-normal);
}

.search-input::placeholder {
  color: var(--text-secondary);
}

.search-input:focus {
  border-color: var(--neon-purple);
  box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.15), 0 4px 20px rgba(0, 0, 0, 0.3);
  background: var(--bg-card);
}

.search-clear {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.search-input:not(:placeholder-shown) ~ .search-clear {
  display: flex;
}

.search-clear:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--text-primary);
}

.search-hint {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  min-height: 1.4em;
  display: none;
}

/* ==================== 主内容区 ==================== */
.main {
  padding: 20px 0 60px;
}

/* ==================== 数据源 Tab ==================== */
.source-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}

.source-tabs::-webkit-scrollbar {
  display: none;
}

.source-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-normal);
  user-select: none;
}

.source-tab:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--bg-card);
}

.source-tab.active {
  color: white;
  background: var(--gradient-primary);
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(168, 85, 247, 0.3);
}

.tab-icon {
  font-size: 1.1rem;
}

/* ==================== 工具栏 ==================== */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

.toolbar-section {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.toolbar-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filter-group {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.filter-chip,
.sort-chip {
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.filter-chip:hover,
.sort-chip:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.filter-chip.active,
.sort-chip.active {
  color: var(--neon-cyan);
  background: rgba(6, 182, 212, 0.1);
  border-color: var(--neon-cyan);
}

/* ==================== 统计栏 ==================== */
.stats-bar {
  display: none;
  align-items: center;
  gap: 32px;
  margin-bottom: 24px;
  padding: 16px 24px;
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.stat-extra {
  margin-left: auto;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ==================== 游戏网格 ==================== */
.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  min-height: 200px;
}

/* ==================== 游戏卡片 ==================== */
.game-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-normal);
  opacity: 0;
  transform: translateY(20px);
}

.game-card.animate-in {
  animation: cardFadeIn 0.4s ease forwards;
}

@keyframes cardFadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.game-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card-hover);
}

.game-card:focus-visible {
  outline: 2px solid var(--neon-cyan);
  outline-offset: 2px;
}

.card-image {
  width: 100%;
  height: 180px;
  background-size: cover;
  background-position: center;
  background-color: var(--bg-secondary);
  position: relative;
}

.card-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-card);
}

.placeholder-icon {
  font-size: 3rem;
  opacity: 0.5;
}

.card-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  color: white;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-sm);
  text-transform: capitalize;
}

.card-body {
  padding: 14px 16px;
}

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.card-platform {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-worth {
  color: var(--neon-green);
  font-weight: 600;
  flex-shrink: 0;
}

.card-stars {
  color: var(--neon-orange);
  flex-shrink: 0;
}

.card-deadline {
  margin-top: 6px;
  font-size: 0.78rem;
  color: var(--neon-orange);
}

/* ==================== 骨架屏 ==================== */
.skeleton-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.skeleton-image {
  width: 100%;
  height: 180px;
  background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-elevated) 50%, var(--bg-secondary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
}

.skeleton-body {
  padding: 14px 16px;
}

.skeleton-title {
  height: 16px;
  width: 75%;
  background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-elevated) 50%, var(--bg-secondary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: 4px;
  margin-bottom: 10px;
}

.skeleton-meta {
  height: 12px;
  width: 50%;
  background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-elevated) 50%, var(--bg-secondary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: 4px;
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ==================== 空状态 ==================== */
.empty-state,
.error-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
}

.empty-icon,
.error-icon {
  font-size: 4rem;
  margin-bottom: 16px;
}

.empty-state h3,
.error-state h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-state p,
.error-state p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.btn-retry {
  margin-top: 16px;
  padding: 10px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  color: white;
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-retry:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(168, 85, 247, 0.3);
}

/* ==================== 加载更多 ==================== */
.load-more-container {
  text-align: center;
  margin-top: 32px;
}

.btn-load-more {
  padding: 12px 36px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-load-more:hover {
  background: var(--bg-card);
  box-shadow: 0 4px 15px rgba(168, 85, 247, 0.15);
  transform: translateY(-2px);
}

/* ==================== 加载指示器 ==================== */
.loading-indicator {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 32px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.loading-indicator.active {
  display: flex;
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--neon-purple);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ==================== 弹窗 ==================== */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  padding: 40px 20px;
  overflow-y: auto;
}

.modal.active {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  animation: fadeIn 0.2s ease;
}

.modal-content {
  position: relative;
  width: 100%;
  max-width: 680px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-modal);
  animation: slideUp 0.3s ease;
  margin-top: 20px;
}

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

@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 10;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: rgba(0, 0, 0, 0.7);
  transform: scale(1.1);
}

.modal-image {
  width: 100%;
  height: 280px;
  background-size: cover;
  background-position: center;
  background-color: var(--bg-secondary);
}

.modal-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-card);
}

.placeholder-icon-large {
  font-size: 5rem;
  opacity: 0.4;
}

.modal-body {
  padding: 28px;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.tag {
  padding: 4px 12px;
  font-size: 0.8rem;
  font-weight: 500;
  border-radius: var(--radius-xl);
}

.tag-platform {
  background: rgba(59, 130, 246, 0.15);
  color: var(--neon-blue);
}

.tag-genre {
  background: rgba(168, 85, 247, 0.15);
  color: var(--neon-purple);
}

.tag-worth {
  background: rgba(34, 197, 94, 0.15);
  color: var(--neon-green);
}

.tag-stars {
  background: rgba(249, 115, 22, 0.15);
  color: var(--neon-orange);
}

.tag-lang {
  background: rgba(6, 182, 212, 0.15);
  color: var(--neon-cyan);
}

.tag-multi {
  background: rgba(236, 72, 153, 0.15);
  color: var(--neon-pink);
}

.modal-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 20px;
  white-space: pre-wrap;
  word-break: break-word;
}

.modal-info-row {
  display: flex;
  gap: 12px;
  padding: 8px 0;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border-subtle);
}

.info-label {
  color: var(--text-secondary);
  min-width: 80px;
  flex-shrink: 0;
}

.deadline-text {
  color: var(--neon-orange);
  font-weight: 600;
}

.modal-instructions {
  margin-top: 16px;
  padding: 14px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.modal-instructions strong {
  color: var(--text-primary);
}

.btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin-top: 20px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 700;
  color: white;
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-normal);
}

.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(168, 85, 247, 0.35);
  color: white;
}

/* ==================== 相关游戏 ==================== */
.modal-related {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}

.modal-related h4 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.related-item:hover {
  border-color: var(--border-hover);
  background: var(--bg-elevated);
}

.related-title {
  font-size: 0.9rem;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.related-stars {
  font-size: 0.8rem;
  color: var(--neon-orange);
  flex-shrink: 0;
  margin-left: 12px;
}

/* ==================== 页脚 ==================== */
.footer {
  text-align: center;
  padding: 40px 20px;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links {
  margin-top: 8px;
}

.footer-links a {
  color: var(--neon-purple);
}

.footer-links a:hover {
  color: var(--neon-cyan);
}

.footer-note {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
  .hero-title {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .games-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
  }

  .toolbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
  }

  .stats-bar {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

  .stat-extra {
    margin-left: 0;
    text-align: center;
  }

  .modal {
    padding: 16px 12px;
  }

  .modal-content {
    margin-top: 10px;
  }

  .modal-image {
    height: 200px;
  }

  .modal-body {
    padding: 20px;
  }

  .card-image {
    height: 150px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 40px 0 30px;
  }

  .hero-title {
    font-size: 1.5rem;
  }

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

  .filter-group {
    overflow-x: auto;
    flex-wrap: nowrap;
    max-width: 100%;
    padding-bottom: 4px;
    scrollbar-width: none;
  }

  .filter-group::-webkit-scrollbar {
    display: none;
  }
}