/* 
 * IXYS Distributor Website - Base Styles
 * Global styles, variables, and base element styling
 */

/* CSS Custom Properties (Variables) */
:root {
  /* Colors */
  --primary-color: #1E3A8A;        /* Deep blue for headers and primary actions */
  --primary-light: #3B82F6;        /* Lighter blue for accents */
  --secondary-color: #F97316;      /* Orange for CTAs and highlights */
  --neutral-gray: #6B7280;         /* Gray for text and subtle elements */
  --dark-gray: #1F2937;            /* Dark gray for headers and important text */
  --light-gray: #F3F4F6;           /* Light gray for backgrounds and dividers */
  --white: #FFFFFF;                /* Pure white for backgrounds */
  --black: #000000;                /* Pure black for text where needed */
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', Courier, monospace;
  
  /* Spacing */
  --base-unit: 16px;
  --spacing-xs: calc(var(--base-unit) * 0.5);    /* 8px */
  --spacing-sm: var(--base-unit);                /* 16px */
  --spacing-md: calc(var(--base-unit) * 1.5);    /* 24px */
  --spacing-lg: calc(var(--base-unit) * 2);      /* 32px */
  --spacing-xl: calc(var(--base-unit) * 3);      /* 48px */
  --spacing-2xl: calc(var(--base-unit) * 4);     /* 64px */
  --spacing-3xl: calc(var(--base-unit) * 5);     /* 80px */
  
  /* Breakpoints */
  --mobile: 768px;
  --tablet: 1024px;
  --desktop: 1200px;
  
  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Base Styles */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-primary);
  color: var(--dark-gray);
  line-height: 1.6;
  background-color: var(--white);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  color: var(--dark-gray);
  font-weight: 600;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--primary-color);
  text-decoration: none;
}

a:hover {
  color: var(--secondary-color);
  text-decoration: underline;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: var(--transition-normal);
  text-decoration: none;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--secondary-color);
  color: white;
}

.btn-primary:hover {
  background-color: #ea580c;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Cards */
.card {
  background-color: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
  transition: var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

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

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

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

/* Utility Classes */
.text-center {
  text-align: center;
}

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

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

.margin-bottom-lg {
  margin-bottom: var(--spacing-2xl);
}

.margin-top-lg {
  margin-top: var(--spacing-2xl);
}

.hidden {
  display: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Responsive adjustments */
@media (min-width: 768px) {
  .grid-2col {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3col {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .grid-4col {
    grid-template-columns: repeat(4, 1fr);
  }
  
  h1 {
    font-size: 3rem;
  }
  
  h2 {
    font-size: 2.5rem;
  }
}