/* 基礎佈局 - 遊戲峽谷部落格 */
body {
  font-family: var(--font-primary);
  background: var(--primary-bg);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 容器系統 */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-sm { max-width: var(--container-sm); }
.container-md { max-width: var(--container-md); }
.container-lg { max-width: var(--container-lg); }
.container-2xl { max-width: var(--container-2xl); }

/* 頁面主要結構 */
.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  padding: var(--space-xl) 0;
}

/* 導航欄 */
.navbar {
  background: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  transition: all var(--duration-normal) var(--ease-out);
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
}

.navbar-logo {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.navbar-nav a {
  color: var(--text-secondary);
  font-weight: var(--font-medium);
  transition: color var(--duration-normal) var(--ease-out);
  position: relative;
}

.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--accent-blue);
}

.navbar-nav a::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--duration-normal) var(--ease-out);
}

.navbar-nav a:hover::after,
.navbar-nav a.active::after {
  width: 100%;
}

/* 手機導航 */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-sm);
  cursor: pointer;
}

.navbar-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--duration-normal) var(--ease-out);
}

.navbar-mobile {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--secondary-bg);
  border-bottom: 1px solid var(--border-color);
  padding: var(--space-lg);
}

.navbar-mobile.active {
  display: block;
}

.navbar-mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.navbar-mobile-nav a {
  color: var(--text-secondary);
  font-weight: var(--font-medium);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid transparent;
  transition: all var(--duration-normal) var(--ease-out);
}

.navbar-mobile-nav a:hover,
.navbar-mobile-nav a.active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
}

/* 網格系統 */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

/* Flexbox 工具 */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* 頁腳 */
.footer {
  background: var(--secondary-bg);
  border-top: 1px solid var(--border-color);
  padding: var(--space-2xl) 0 var(--space-xl);
  margin-top: auto;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-section h3 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.footer-section p,
.footer-section li {
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-section ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-section a {
  transition: color var(--duration-normal) var(--ease-out);
}

.footer-section a:hover {
  color: var(--accent-blue);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: var(--space-lg);
  text-align: center;
  color: var(--text-muted);
  font-size: var(--text-sm);
}

/* 響應式設計 */
@media (max-width: 768px) {
  .navbar-nav {
    display: none;
  }
  
  .navbar-toggle {
    display: flex;
  }
  
  .container {
    padding: 0 var(--space-sm);
  }
  
  .main-content {
    padding: var(--space-lg) 0;
  }
  
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

@media (min-width: 769px) and (max-width: 1023px) {
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .grid-cols-4 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1280px) {
  .grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 實用工具類 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden { display: none; }
.block { display: block; }
.inline { display: inline; }
.inline-block { display: inline-block; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }