:root {
  /* Apple-inspired color system */
  --bg-primary: #fafbfc;
  --bg-secondary: #f5f7fa;
  --bg-gradient: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  
  --card: #ffffff;
  --card-elevated: #ffffff;
  --card-hover: #fdfdfe;
  
  --primary: #007aff; /* Apple blue */
  --primary-hover: #0051d5;
  --primary-light: #f0f8ff;
  --primary-gradient: linear-gradient(135deg, #007aff 0%, #5ac8fa 100%);
  
  --secondary: #5ac8fa; /* Light blue */
  --accent: #ff9500; /* Orange */
  --success: #30d158; /* Green */
  --warning: #ffcc00; /* Yellow */
  --danger: #ff3b30; /* Red */
  
  --text-primary: #1d1d1f;
  --text-secondary: #8e8e93;
  --text-tertiary: #aeaeb2;
  
  --border: #e5e5ea;
  --border-light: #f2f2f7;
  --separator: #d1d1d6;
  
  --shadow: 0 2px 10px rgba(0,0,0,0.06);
  --shadow-light: 0 1px 4px rgba(0,0,0,0.04);
  --shadow-elevated: 0 8px 32px rgba(0,0,0,0.08);
  
  --radius: 12px;
  --radius-large: 16px;
  --radius-small: 8px;
  --radius-xl: 20px;
}

* { 
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html, body { 
  height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', system-ui, sans-serif;
  background: var(--bg-gradient);
  color: var(--text-primary);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.022em;
}

.container { 
  width: min(1200px, 92%); 
  margin: 0 auto; 
}

.site-header { 
  padding: 60px 0 40px; 
  text-align: center;
}

.title { 
  margin: 0; 
  font-weight: 700; 
  font-size: clamp(32px, 5vw, 48px);
  letter-spacing: -0.025em;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle { 
  margin: 12px 0 0; 
  color: var(--text-secondary);
  font-size: 18px;
  font-weight: 400;
}

.catalog {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  padding: 24px 0 80px;
  max-width: 800px;
  margin: 0 auto;
}

.card {
  background: var(--card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  background: var(--card-hover);
  border-color: var(--primary);
  box-shadow: var(--shadow-elevated);
  transform: translateY(-2px);
}

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

.card-body { 
  padding: 32px 28px; 
}

.card-title { 
  margin: 0 0 12px 0; 
  font-size: 22px; 
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.022em;
}

.card-desc { 
  margin: 0 0 24px 0; 
  color: var(--text-secondary); 
  min-height: 48px;
  font-size: 16px;
  line-height: 1.5;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  background: var(--primary);
  color: #ffffff;
  text-decoration: none;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 16px;
  min-width: 140px;
  transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  border: none;
  cursor: pointer;
  letter-spacing: -0.011em;
}

.button:hover { 
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.button:active { 
  transform: translateY(0);
  transition-duration: 0.1s;
}

.button:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.site-footer { 
  border-top: 1px solid var(--separator); 
  padding: 32px 0 48px; 
  text-align: center;
}

.site-footer small {
  color: var(--text-tertiary);
  font-size: 14px;
  font-weight: 400;
}

/* Responsive design */
@media (max-width: 768px) {
  .site-header {
    padding: 40px 0 32px;
  }
  
  .title {
    font-size: clamp(28px, 8vw, 40px);
  }
  
  .subtitle {
    font-size: 16px;
  }
  
  .catalog {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 20px 0 60px;
  }
  
  .card-body {
    padding: 24px 20px;
  }
  
  .card-title {
    font-size: 20px;
  }
  
  .card-desc {
    font-size: 15px;
    min-height: auto;
  }
  
  .button {
    padding: 12px 24px;
    font-size: 15px;
    min-width: 120px;
  }
}

/* Light-only design - maintaining consistency */
@media (prefers-color-scheme: dark) {
  :root { 
    --bg-primary: #fafbfc; 
    --bg-secondary: #f5f7fa; 
    --card: #ffffff; 
    --text-primary: #1d1d1f;
    --text-secondary: #8e8e93;
  }
}