/* Modern Design System - Inspired by son-doong-expeditions */
:root {
  --background: oklch(1 0 0);
  --foreground: oklch(0.145 0 0);
  --card: oklch(1 0 0);
  --card-foreground: oklch(0.145 0 0);
  --primary: oklch(0.205 0 0);
  --primary-foreground: oklch(0.985 0 0);
  --secondary: oklch(0.97 0 0);
  --secondary-foreground: oklch(0.205 0 0);
  --muted: oklch(0.97 0 0);
  --muted-foreground: oklch(0.556 0 0);
  --accent: oklch(0.97 0 0);
  --accent-foreground: oklch(0.205 0 0);
  --border: oklch(0.922 0 0);
  --ring: oklch(0.708 0 0);
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--background);
  color: var(--foreground);
  line-height: 1.6;
}

/* Smooth gradients */
.bg-gradient-to-b {
  background: linear-gradient(to bottom, var(--background), rgba(255, 255, 255, 0.95));
}

/* Navigation styles */
.nav-sticky {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.8);
}

/* Hero section */
.hero-section {
  position: relative;
  padding: 6rem 1.5rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
}

.hero-gradient-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0, 0, 0, 0.05), transparent, rgba(0, 0, 0, 0.05));
  filter: blur(48px);
}

/* Card styles */
.modern-card {
  border-radius: 1rem;
  background: var(--card);
  border: 1px solid rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(4px);
  transition: all 0.2s ease;
  overflow: hidden;
}

.modern-card:hover {
  border-color: rgba(0, 0, 0, 0.15);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* Search box styles - 毛玻璃效果 */
.search-box {
  border-radius: 1rem !important;
  background: rgba(255, 255, 255, 0.15) !important;
  border: 1px solid rgba(255, 255, 255, 0.25) !important;
  backdrop-filter: blur(16px) !important;
  -webkit-backdrop-filter: blur(16px) !important;
  padding: 2rem !important;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1) !important;
}

/* Button styles */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  background: var(--primary);
  color: var(--primary-foreground);
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
  transform: translateY(-2px);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.9);
  color: #1a365d;
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 1);
}

/* Input styles - 毛玻璃风格 */
.modern-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #1a365d;
  outline: none;
  transition: all 0.2s ease;
}

.modern-input:focus {
  border-color: rgba(255, 255, 255, 0.6);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.95);
}

.modern-input::placeholder {
  color: #64748b;
}

/* Select styles - 毛玻璃风格 */
.modern-select {
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #1a365d;
  outline: none;
  transition: all 0.2s ease;
  cursor: pointer;
}

.modern-select:focus {
  border-color: rgba(255, 255, 255, 0.6);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.15);
}

/* Language toggle - 毛玻璃风格 */
.lang-toggle {
  display: flex;
  gap: 0.5rem;
  padding: 0.25rem;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 0.5rem;
}

.lang-btn {
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  border: none;
  background: transparent;
  color: rgba(255, 255, 255, 0.7);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.875rem;
}

.lang-btn.active {
  background: rgba(255, 255, 255, 0.9);
  color: #1a365d;
  font-weight: 500;
}

/* Category cards with gradient backgrounds */
.category-card-proteomics {
  background: linear-gradient(to bottom right, rgba(59, 130, 246, 0.2), rgba(37, 99, 235, 0.2));
}

.category-card-metabolomics {
  background: linear-gradient(to bottom right, rgba(34, 197, 94, 0.2), rgba(22, 163, 74, 0.2));
}

.category-card-lipidomics {
  background: linear-gradient(to bottom right, rgba(251, 191, 36, 0.2), rgba(245, 158, 11, 0.2));
}

/* Feature icons */
.feature-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(to bottom right, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.05));
  transition: all 0.2s ease;
}

.feature-icon:hover {
  background: linear-gradient(to bottom right, rgba(0, 0, 0, 0.15), rgba(0, 0, 0, 0.1));
}

/* Utility classes */
.text-balance {
  text-wrap: balance;
}

.text-pretty {
  text-wrap: pretty;
}

/* Responsive grid */
@media (max-width: 768px) {
  .hero-section {
    padding: 3rem 1rem;
  }
  
  .search-box {
    padding: 1.5rem;
  }
}