/* =========================================
   FlyLoong Navigation - Cinematic Style
   ========================================= */

/* 1. 日间模式 (Light Mode) 
   你表示满意，所以我保留了原本清爽的风格，
   只微调了背景，让它稍微干净一点。
*/
:root {
  --bg: #f8fafc;
  --card-bg: rgba(255, 255, 255, 0.75); /*稍微提高一点不透明度，防止太乱*/
  --nav-bg: rgba(255, 255, 255, 0.85);
  --text: #1e293b;
  --text-sub: #64748b;
  --primary: #000000; /* 日间保留紫色，或者你也可以改成金色 */
  --border: rgba(0, 0, 0, 0.06);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
  --glass: blur(20px);
}

/* 2. 黑夜模式 (Cinematic Dark / Black Gold) 
   【核心重构区域】
*/
@media (prefers-color-scheme: dark) {
  :root {
    /* 背景：纯黑与深灰的交响 */
    --bg: #000000;
    
    /* 卡片：极度通透的黑水晶 */
    --card-bg: rgba(30, 30, 30, 0.4);
    
    /* 导航：深色毛玻璃 */
    --nav-bg: rgba(0, 0, 0, 0.6);
    
    /* 文字：Apple Watch 风格的亮白与高级灰 */
    --text: #f5f5f7;
    --text-sub: #86868b;
    
    /* 主题色：【核心】流沙金 (替代原来的紫色) */
    --primary: #d4b483;
    
    /* 边框：极细微的白光 */
    --border: rgba(255, 255, 255, 0.08);
    
    /* 阴影：深邃的氛围光 */
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding-top: 80px;
  transition: background-color 0.3s ease;
  
  /* 默认日间背景装饰 */
  background-image:
    radial-gradient(circle at 15% 25%, rgba(99, 102, 241, 0.05) 0%, transparent 25%),
    radial-gradient(circle at 85% 75%, rgba(139, 92, 246, 0.05) 0%, transparent 25%);
}

/* 【核心】黑夜模式背景重写：深空聚光灯 */
@media (prefers-color-scheme: dark) {
  body {
    /* 模拟舞台顶部打下来的光，制造纵深感 */
    background-image: radial-gradient(circle at 50% 0%, #1c1c1e 0%, #000000 85%);
    background-attachment: fixed; /* 滚动时背景不动，增加高级感 */
  }
}

/* =========================================
   组件：导航栏
   ========================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 70px;
  background: var(--nav-bg);
  backdrop-filter: var(--glass);
  -webkit-backdrop-filter: var(--glass);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.nav-container {
  width: 100%;
  max-width: 1280px;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-tabs {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0.5rem 0;
}
.nav-tabs::-webkit-scrollbar { display: none; }

/* 导航按钮 */
.tab-btn {
  background: transparent;
  border: 1px solid transparent; /* 预留边框位置 */
  color: var(--text);
  font-size: 0.95rem;
  padding: 0.5rem 1.2rem;
  border-radius: 50px; /* 胶囊形状更现代 */
  cursor: pointer;
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0.7;
}

.tab-btn:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.05);
}

/* 激活状态：日间紫/夜间金 */
.tab-btn.active {
  background: var(--primary);
  color: #fff; /* 文字永远白色 */
  opacity: 1;
  box-shadow: 0 0 15px rgba(0,0,0,0.2);
}

/* 黑夜模式下的激活态微调：发光字+透底 (可选，目前用实色填充更醒目) */
@media (prefers-color-scheme: dark) {
  .tab-btn.active {
    color: #000; /* 金色背景配黑色文字更像黑金 */
    font-weight: 600;
    box-shadow: 0 0 20px rgba(212, 180, 131, 0.4); /* 金色光晕 */
  }
}

/* =========================================
   组件：搜索区
   ========================================= */
.main-content {
  max-width: 1280px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.search-wrapper {
  max-width: 600px;
  margin: 0 auto 3rem auto;
  text-align: center;
}

.search-engines {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.0rem;
  margin-bottom: 1.2rem;
}

.divider {
  width: 1px;
  height: 16px;
  background-color: var(--text);
  opacity: 0.2;
  margin: 0 0.2rem;
}

/* 快捷图标 */
.mini-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  transition: all 0.2s ease;
  opacity: 0.8;
  background: rgba(255,255,255,0.05); /* 微弱背景 */
}
.mini-icon:hover {
  opacity: 1;
  background: rgba(255,255,255,0.15);
  transform: scale(1.1);
}
.mini-icon img {
  width: 20px;
  height: 20px;
}

/* 引擎切换按钮 */
.engine-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  opacity: 0.6;
  font-size: 0.85rem;
  cursor: pointer;
  padding: 6px 16px;
  border-radius: 20px;
  transition: all 0.2s;
}
.engine-btn:hover { opacity: 1; border-color: var(--primary); }
.engine-btn.active {
  opacity: 1;
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
  font-weight: 600;
}
/* 黑夜模式下引擎按钮激活态：金色 */
@media (prefers-color-scheme: dark) {
  .engine-btn.active {
    background: var(--primary);
    color: #000;
    border-color: var(--primary);
  }
}

/* 搜索框：毛玻璃化 */
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}
.search-input {
  width: 100%;
  padding: 1rem 1.5rem;
  padding-right: 3.5rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  
  /* 玻璃质感 */
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  
  color: var(--text);
  font-size: 1rem;
  outline: none;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}
.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.1);
}
/* 黑夜模式聚焦光晕：金色 */
@media (prefers-color-scheme: dark) {
  .search-input:focus {
    box-shadow: 0 0 30px rgba(212, 180, 131, 0.1); /* 金色微光 */
  }
}

.search-btn {
  position: absolute;
  right: 15px;
  background: transparent;
  border: none;
  color: var(--primary);
  font-size: 1.3rem;
  cursor: pointer;
  opacity: 0.8;
  transition: opacity 0.2s;
}
.search-btn:hover { opacity: 1; }

/* =========================================
   组件：内容板块
   ========================================= */
.category-section {
  display: none;
}
.category-section.active {
  display: block;
  animation: fadeIn 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-header {
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding-left: 0.5rem;
}
.section-title {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

/* Grid 网格 */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

/* 卡片：核心质感 */
.card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem;
  
  /* 玻璃背景 */
  background: var(--card-bg);
  backdrop-filter: var(--glass);
  -webkit-backdrop-filter: var(--glass);
  
  border: 1px solid var(--border);
  border-radius: 18px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
}

.card:hover {
  transform: translateY(-4px);
  /* 悬停时加亮背景 */
  background: rgba(255, 255, 255, 0.9);
  border-color: var(--primary);
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* 黑夜模式悬停：深色加亮 */
@media (prefers-color-scheme: dark) {
  .card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 10px 40px rgba(0,0,0,0.5); /* 更深的阴影 */
  }
}

.card img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  object-fit: cover;
}

.card-info h3 {
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 2px;
}

/* --- 折叠组件 (Tools) --- */
details {
  background: var(--card-bg);
  backdrop-filter: var(--glass);
  -webkit-backdrop-filter: var(--glass);
  border: 1px solid var(--border);
  border-radius: 18px;
  margin-bottom: 1rem;
  overflow: hidden;
  transition: all 0.3s ease;
}

summary {
  padding: 1.2rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  transition: background 0.2s;
}
summary:hover {
  background: rgba(125, 125, 125, 0.05);
}
summary::after {
  content: '\ea4e'; /* RemixIcon arrow */
  font-family: 'remixicon';
  font-size: 1.2rem;
  color: var(--text-sub);
  transition: transform 0.3s;
}
details[open] summary::after { transform: rotate(180deg); }
summary::-webkit-details-marker { display: none; }

details .grid {
  padding: 0 1.2rem 1.5rem 1.2rem;
  margin-top: 0;
}

footer {
  text-align: center;
  padding: 4rem 0;
  color: var(--text-sub);
  font-size: 0.85rem;
  letter-spacing: 1px;
}

/* 加载动画 */
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}