/* ========================================
   Nations Section - 原神介绍网站
   ======================================== */

.nations-section {
  position: relative;
  z-index: 1;
}

.nations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.nation-card {
  position: relative;
  background: var(--color-bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  overflow: hidden;
  transition: var(--transition-base);
  cursor: default;
}

.nation-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--nation-color), transparent);
  opacity: 0.6;
  transition: opacity var(--transition-base);
}

.nation-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, var(--nation-color-alpha, rgba(255,255,255,0.03)) 0%, transparent 70%);
  transition: opacity var(--transition-base);
  opacity: 0;
}

.nation-card:hover {
  transform: translateY(-6px) scale(1.02);
  border-color: var(--nation-color);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 30px var(--nation-color-alpha, rgba(255,255,255,0.05));
}

.nation-card:hover::before {
  opacity: 1;
}

.nation-card:hover::after {
  opacity: 1;
}

.nation-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.nation-element-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--nation-color-alpha, rgba(255,255,255,0.05));
  border-radius: var(--radius-md);
  flex-shrink: 0;
  transition: var(--transition-base);
}

.nation-card:hover .nation-element-icon {
  transform: scale(1.1);
  box-shadow: 0 0 20px var(--nation-color-alpha, rgba(255,255,255,0.1));
}

.nation-element-icon svg {
  width: 32px;
  height: 32px;
}

.nation-info h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 2px;
}

.nation-info-sub {
  font-size: 0.85rem;
  color: var(--nation-color);
  font-weight: 500;
  letter-spacing: 1px;
}

.nation-desc {
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
  transition: color var(--transition-base);
}

.nation-card:hover .nation-desc {
  color: var(--color-text-primary);
}

.nation-archon {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-xl);
  position: relative;
  z-index: 1;
}

.nation-archon svg {
  width: 14px;
  height: 14px;
  fill: var(--color-accent-gold);
  opacity: 0.7;
}

.nation-archon strong {
  color: var(--color-accent-gold);
  font-weight: 600;
}

/* Snezhnaya special styling */
.nation-card[data-nation="snezhnaya"] {
  border-style: dashed;
  border-color: rgba(159, 214, 227, 0.2);
}

.nation-card[data-nation="snezhnaya"]:hover {
  border-style: solid;
}

.nation-card[data-nation="snezhnaya"] .nation-info-sub {
  opacity: 0.7;
}

/* Responsive */
@media (max-width: 768px) {
  .nations-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .nation-card {
    padding: 24px 20px;
  }
}

@media (max-width: 480px) {
  .nation-card-header {
    gap: 12px;
  }

  .nation-element-icon {
    width: 48px;
    height: 48px;
  }

  .nation-element-icon svg {
    width: 28px;
    height: 28px;
  }

  .nation-info h3 {
    font-size: 1.2rem;
  }
}