/* PayCrate 黑色冷格调主题 - 高端大气上档次 */
:root {
  /* 主色调 - 深黑冷色系 */
  --primary-black: #0a0a0a;
  --secondary-black: #111111;
  --tertiary-black: #1a1a1a;
  --card-black: #161616;
  
  /* 冷色调点缀 */
  --ice-blue: #00d4ff;
  --electric-blue: #0080ff;
  --steel-blue: #4a90e2;
  --silver: #c0c0c0;
  --platinum: #e5e5e5;
  
  /* 渐变色 */
  --gradient-primary: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 50%, #0080ff 100%);
  --gradient-secondary: linear-gradient(135deg, #111111 0%, #00d4ff 100%);
  --gradient-accent: linear-gradient(135deg, #00d4ff 0%, #0080ff 100%);
  --gradient-card: linear-gradient(135deg, #161616 0%, #1a1a1a 100%);
  
  /* 文字颜色 */
  --text-primary: #ffffff;
  --text-secondary: #e5e5e5;
  --text-muted: #a0a0a0;
  --text-accent: #00d4ff;
  
  /* 阴影效果 */
  --shadow-light: 0 4px 20px rgba(0, 212, 255, 0.1);
  --shadow-medium: 0 8px 30px rgba(0, 212, 255, 0.2);
  --shadow-heavy: 0 15px 50px rgba(0, 212, 255, 0.3);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.4);
  
  /* 边框 */
  --border-subtle: 1px solid rgba(0, 212, 255, 0.1);
  --border-medium: 1px solid rgba(0, 212, 255, 0.3);
  --border-strong: 2px solid rgba(0, 212, 255, 0.5);
  
  /* 动画时间 */
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

body {
  font-family: 'Inter', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  background: var(--gradient-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 背景动画效果 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 20%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(0, 128, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 60%, rgba(74, 144, 226, 0.05) 0%, transparent 50%);
  z-index: -1;
  animation: backgroundPulse 20s ease-in-out infinite;
}

@keyframes backgroundPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.6; }
}

/* 导航栏样式 */
.navbar {
  background: rgba(10, 10, 10, 0.95) !important;
  backdrop-filter: blur(20px);
  border-bottom: var(--border-subtle);
  padding: 1rem 0;
  transition: all var(--transition-smooth);
}

.navbar-brand {
  font-weight: 800;
  font-size: 1.8rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

.nav-link {
  color: var(--text-secondary) !important;
  font-weight: 500;
  transition: all var(--transition-smooth);
  position: relative;
  padding: 0.5rem 1rem !important;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: all var(--transition-smooth);
  transform: translateX(-50%);
}

.nav-link:hover {
  color: var(--text-accent) !important;
  transform: translateY(-2px);
}

.nav-link:hover::after {
  width: 80%;
}

/* 语言切换按钮 */
.language-switch {
  background: var(--gradient-secondary);
  border: none;
  border-radius: 25px;
  padding: 8px 16px;
  color: var(--text-primary);
  font-weight: 600;
  transition: all var(--transition-smooth);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-light);
}

.language-switch:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
  color: var(--text-primary);
}

/* 按钮样式 */
.btn-primary {
  background: var(--gradient-accent);
  border: none;
  border-radius: 30px;
  padding: 12px 30px;
  font-weight: 600;
  transition: all var(--transition-smooth);
  box-shadow: var(--shadow-medium);
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-smooth);
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
  color: var(--text-primary);
}

.btn-outline-primary {
  border: 2px solid var(--ice-blue);
  color: var(--ice-blue);
  border-radius: 30px;
  padding: 10px 25px;
  font-weight: 600;
  transition: all var(--transition-smooth);
  background: transparent;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn-outline-primary:hover {
  background: var(--gradient-accent);
  color: var(--text-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
  border-color: transparent;
}

/* 卡片样式 */
.card, .hero-section, .search-section, .category-nav, .product-section {
  background: var(--gradient-card);
  border: var(--border-subtle);
  border-radius: 20px;
  padding: 2rem;
  margin: 2rem auto;
  box-shadow: var(--shadow-medium);
  backdrop-filter: blur(20px);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.card::before, .hero-section::before, .search-section::before, 
.category-nav::before, .product-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-accent);
}

.card:hover, .product-section:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(0, 212, 255, 0.3);
}

/* 英雄区域 */
.hero-section {
  text-align: center;
  padding: 4rem 2rem;
  margin-top: 2rem;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
  text-shadow: 0 0 50px rgba(0, 212, 255, 0.3);
  animation: titleGlow 3s ease-in-out infinite alternate;
}

@keyframes titleGlow {
  0% { filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.3)); }
  100% { filter: drop-shadow(0 0 30px rgba(0, 212, 255, 0.6)); }
}

.hero-subtitle {
  font-size: 1.3rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-weight: 300;
}

/* 搜索区域 */
.search-input {
  border: var(--border-medium);
  border-radius: 30px;
  padding: 15px 25px;
  font-size: 1rem;
  background: rgba(22, 22, 22, 0.8);
  color: var(--text-primary);
  transition: all var(--transition-smooth);
  backdrop-filter: blur(10px);
}

.search-input:focus {
  border-color: var(--ice-blue);
  box-shadow: var(--shadow-glow);
  background: rgba(22, 22, 22, 0.95);
  color: var(--text-primary);
}

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

/* 分类按钮 */
.category-btn {
  margin: 0.5rem;
  border-radius: 30px;
  padding: 12px 25px;
  font-weight: 600;
  transition: all var(--transition-smooth);
  border: var(--border-medium);
  color: var(--ice-blue);
  background: transparent;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: relative;
  overflow: hidden;
}

.category-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--gradient-accent);
  transition: left var(--transition-smooth);
  z-index: -1;
}

.category-btn:hover::before {
  left: 0;
}

.category-btn:hover {
  color: var(--text-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
  border-color: transparent;
}

/* 产品卡片 */
.product-card {
  background: var(--gradient-card);
  border: var(--border-subtle);
  border-radius: 20px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-medium);
  transition: all var(--transition-smooth);
  height: 100%;
  color: var(--text-primary);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-accent);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(0, 212, 255, 0.5);
}

.product-image {
  height: 80px;
  object-fit: contain;
  margin-bottom: 1rem;
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.1);
  padding: 10px;
  transition: all var(--transition-smooth);
}

.product-card:hover .product-image {
  transform: scale(1.1);
  box-shadow: var(--shadow-light);
}

.product-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.product-price {
  color: var(--ice-blue);
  font-weight: 800;
  font-size: 1.3rem;
  margin-bottom: 1rem;
  text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

/* 表单控件 */
.form-select, .form-control {
  border-radius: 15px;
  border: var(--border-medium);
  padding: 12px 16px;
  margin-bottom: 1rem;
  background: rgba(22, 22, 22, 0.8);
  color: var(--text-primary);
  transition: all var(--transition-smooth);
}

.form-select:focus, .form-control:focus {
  border-color: var(--ice-blue);
  box-shadow: var(--shadow-light);
  background: rgba(22, 22, 22, 0.95);
  color: var(--text-primary);
}

.form-select option {
  background: var(--secondary-black);
  color: var(--text-primary);
}

/* 购买按钮 */
.buy-btn {
  width: 100%;
  border-radius: 15px;
  padding: 15px;
  font-weight: 700;
  transition: all var(--transition-smooth);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.buy-btn:hover {
  transform: translateY(-3px);
}

/* 分类标题 */
.category-title {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 2rem 0 1.5rem 0;
  text-align: center;
  position: relative;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.category-title::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--gradient-accent);
  border-radius: 2px;
  box-shadow: var(--shadow-light);
}

/* 页脚 */
.footer {
  background: var(--gradient-card);
  border-top: var(--border-subtle);
  border-radius: 30px 30px 0 0;
  padding: 3rem 2rem;
  margin-top: 4rem;
  text-align: center;
  color: var(--text-secondary);
}

.footer a {
  color: var(--ice-blue);
  text-decoration: none;
  transition: all var(--transition-smooth);
}

.footer a:hover {
  color: var(--text-primary);
  text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .hero-title { 
    font-size: 2.5rem; 
  }
  
  .hero-section { 
    padding: 2rem 1rem; 
    margin: 1rem; 
  }
  
  .product-section, .search-section, .category-nav { 
    padding: 1.5rem; 
    margin: 1rem; 
  }
  
  .category-title {
    font-size: 2rem;
  }
  
  .navbar-brand {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero-title { 
    font-size: 2rem; 
  }
  
  .category-title {
    font-size: 1.5rem;
  }
  
  .product-card {
    padding: 1.5rem;
  }
}

/* 加载动画 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.8s ease-out;
}

/* 鼠标悬停发光效果 */
.glow-on-hover {
  position: relative;
  transition: all var(--transition-smooth);
}

.glow-on-hover:hover {
  box-shadow: 
    0 0 20px rgba(0, 212, 255, 0.3),
    0 0 40px rgba(0, 212, 255, 0.2),
    0 0 60px rgba(0, 212, 255, 0.1);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--gradient-accent);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--ice-blue);
}