/* 
 * 全局样式系统 
 * Project: Modern Menswear Gallery
 * Style Strategy: Minimalist, Modern, High-End
 */

/* =========================================
   1. Design Tokens & Pico Overrides
   ========================================= */
:root {
  /* 字体系统：无衬线现代字体 */
  --pico-font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --pico-font-size: 16px;
  --pico-line-height: 1.6;

  /* 色彩系统 */
  --color-dark: #333333;
  --color-black: #222222;
  --color-white: #FFFFFF;
  --color-gray: #F5F5F5;
  --color-gray-text: #555555;
  --color-accent: #B76E22; /* 金属铜 */
  --color-accent-hover: #9a5c1d;

  /* Pico 变量覆盖 */
  --pico-primary: var(--color-accent);
  --pico-primary-background: var(--color-accent);
  --pico-primary-hover: var(--color-accent-hover);
  --pico-primary-focus: rgba(183, 110, 34, 0.125);
  --pico-primary-inverse: var(--color-white);
  
  --pico-background-color: var(--color-white);
  --pico-color: var(--color-gray-text);
  --pico-h1-color: var(--color-black);
  --pico-h2-color: var(--color-black);
  --pico-h3-color: var(--color-black);
  --pico-h4-color: var(--color-black);
  --pico-h5-color: var(--color-black);
  --pico-h6-color: var(--color-black);
  --pico-muted-color: #888888;
  
  --pico-border-radius: 0; /* 极简直角风格 */
  --pico-card-background-color: var(--color-gray);
  --pico-card-sectioning-background-color: #ededed;
  
  /* 布局变量 */
  --nav-height: 80px;
  --spacing-section: 6rem;
}

/* =========================================
   2. Typography & Base
   ========================================= */
body {
  overflow-x: hidden;
  letter-spacing: 0.02em;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

a {
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--color-accent);
}

/* 禁止选中文字以保持视觉纯净（可选） */
::selection {
  background: var(--color-accent);
  color: var(--color-white);
}

/* =========================================
   3. Components: Navigation
   ========================================= */
body > header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid rgba(0,0,0,0.05);
  padding: 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
}

.brand-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-black);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--color-black);
  font-size: 0.9rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-links a.active {
  color: var(--color-accent);
  position: relative;
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: var(--color-accent);
}

/* 移动端菜单按钮（默认隐藏，小屏显示） */
.menu-toggle {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-black);
}

/* =========================================
   4. Components: Hero Section
   ========================================= */
.hero {
  position: relative;
  height: 100vh;
  width: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-section);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -1;
  filter: brightness(0.8);
  transition: transform 8s ease;
}

.hero:hover .hero-bg {
  transform: scale(1.05);
}

.hero-content {
  text-align: center;
  color: var(--color-white);
  z-index: 1;
  max-width: 800px;
  padding: 2rem;
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.5s;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 300;
  margin-bottom: 1rem;
  color: var(--color-white);
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.hero-subtitle {
  font-size: 1.2rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.9);
}

/* =========================================
   5. Components: Layout & Grids
   ========================================= */
.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 5%;
}

.section-padding {
  padding-top: var(--spacing-section);
  padding-bottom: var(--spacing-section);
}

.section-header {
  margin-bottom: 4rem;
  text-align: center;
}

.section-header h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.section-header p {
  font-size: 1rem;
  color: var(--pico-muted-color);
  max-width: 600px;
  margin: 0 auto;
}

/* 不对称网格 */
.grid-asymmetric {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 2rem;
  margin-bottom: 4rem;
}

.grid-item {
  position: relative;
  overflow: hidden;
  background: var(--color-gray);
}

.grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.8s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.grid-item:hover img {
  transform: scale(1.08);
}

.grid-item-large { grid-column: span 8; aspect-ratio: 16/10; }
.grid-item-tall { grid-column: span 4; grid-row: span 2; aspect-ratio: 3/4; }
.grid-item-small { grid-column: span 4; aspect-ratio: 1/1; }
.grid-item-medium { grid-column: span 6; aspect-ratio: 4/3; }

/* 瀑布流模拟 */
.masonry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

/* =========================================
   6. Components: Cards & Interactions
   ========================================= */
.card-minimal {
  background: transparent;
  border: none;
  box-shadow: none;
  margin-bottom: 2rem;
}

.card-image-wrapper {
  overflow: hidden;
  margin-bottom: 1rem;
  position: relative;
}

.card-image-wrapper img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s ease;
}

.card-minimal:hover .card-image-wrapper img {
  transform: scale(1.05);
}

.card-content h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.card-content p {
  font-size: 0.9rem;
  color: var(--pico-muted-color);
}

/* 视差滚动容器 */
.parallax-section {
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 4rem 0;
}

/* =========================================
   7. Footer
   ========================================= */
.site-footer {
  background: var(--color-white);
  padding: 3rem 0;
  text-align: center;
  border-top: 1px solid #eee;
  margin-top: auto;
}

.footer-text {
  font-size: 0.85rem;
  color: #999;
  letter-spacing: 0.05em;
}

/* =========================================
   8. Utilities & Animations
   ========================================= */
.text-center { text-align: center; }
.text-right { text-align: right; }
.uppercase { text-transform: uppercase; }
.mt-0 { margin-top: 0; }
.mb-2 { margin-bottom: 1rem; }
.text-accent { color: var(--color-accent); }

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

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

/* =========================================
   9. Responsive Design
   ========================================= */
@media (max-width: 1024px) {
  .grid-asymmetric {
    grid-template-columns: repeat(8, 1fr);
  }
  .grid-item-large { grid-column: span 8; }
  .grid-item-tall { grid-column: span 4; }
  .grid-item-small { grid-column: span 4; }
  .grid-item-medium { grid-column: span 8; }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }
  
  .nav-links {
    display: none; /* Mobile menu logic to be handled or simplified */
  }
  
  .menu-toggle {
    display: block;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .grid-asymmetric {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .grid-item, .grid-item-large, .grid-item-tall, .grid-item-small, .grid-item-medium {
    grid-column: span 1;
    width: 100%;
    aspect-ratio: auto;
    height: 400px;
  }
  
  .container-wide {
    padding: 0 1rem;
  }
}

/* Pico 修复 */
article {
  box-shadow: none;
  border: 1px solid #f0f0f0;
}