/* ========================================
   DR. LIVELONG - MAIN CSS
   Dopamin Design System
   Version 1.0.0
   ======================================== */

/* ========================================
   CSS VARIABLES (Design System)
   ======================================== */
:root {
  /* Dopamin Colors */
  --color-coral: #FF6B6B;
  --color-orange: #FFB347;
  --color-yellow: #FFE66D;
  --color-turquoise: #4ECDC4;
  --color-mint: #A8E6CF;
  --color-purple: #C7A3FF;
  --color-pink: #FFB3DE;
  --color-blue: #74B9FF;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-coral) 0%, var(--color-orange) 100%);
  --gradient-rainbow: linear-gradient(135deg, 
    var(--color-coral), 
    var(--color-orange), 
    var(--color-yellow), 
    var(--color-turquoise)
  );
  --gradient-purple: linear-gradient(135deg, var(--color-purple), var(--color-pink));
  
  /* Backgrounds */
  --bg-cream: #FFF9F0;
  --bg-white: #FFFFFF;
  --bg-light: rgba(255, 255, 255, 0.95);
  --bg-glass: rgba(255, 255, 255, 0.8);
  
  /* Text */
  --text-dark: #2C3E50;
  --text-medium: #6C7A89;
  --text-light: #95A5A6;
  
  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 40px;
  --spacing-xl: 60px;
  --spacing-2xl: 80px;
  
  /* Border Radius */
  --radius-sm: 12px;
  --radius-md: 24px;
  --radius-lg: 32px;
  --radius-xl: 40px;
  --radius-2xl: 50px;
  --radius-round: 100px;
  
  /* Shadows */
  --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ========================================
   RESET & BASE
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
  background: var(--bg-cream);
  color: var(--text-medium);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-dark);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(36px, 6vw, 64px);
  background: var(--gradient-rainbow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(28px, 4vw, 48px);
}

h3 {
  font-size: clamp(22px, 3vw, 32px);
}

h4 {
  font-size: clamp(18px, 2.5vw, 24px);
}

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--color-coral);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

/* ========================================
   LAYOUT UTILITIES
   ======================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-2xl) 0;
}

.section-sm {
  padding: var(--spacing-xl) 0;
}

.section-lg {
  padding: 120px 0;
}

/* ========================================
   GRID SYSTEM
   ======================================== */
.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   FLEXBOX UTILITIES
   ======================================== */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-column {
  display: flex;
  flex-direction: column;
}

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* ========================================
   TEXT UTILITIES
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-bold { font-weight: 700; }
.text-black { font-weight: 900; }

.text-gradient {
  background: var(--gradient-rainbow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   SPACING UTILITIES
   ======================================== */
.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

/* ========================================
   HEADER
   ======================================== */
header {
  padding: 20px var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.logo {
  font-size: 28px;
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}

@media (max-width: 768px) {
  header {
    padding: 15px var(--spacing-md);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
  }
  
  .section {
    padding: var(--spacing-xl) 0;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  :root {
    font-size: 14px;
  }
}