/* =============================================================================
   CARLO GAVAZZI SALES - MODERN CSS FRAMEWORK
   Phase 4: Structural Modernization
   ============================================================================= */

/* -----------------------------------------------------------------------------
   CSS CUSTOM PROPERTIES (Design Tokens)
   ----------------------------------------------------------------------------- */
:root {
  /* Brand Colors */
  --color-primary: #333399;
  --color-primary-dark: #1a1a66;
  --color-accent: #cc0000;
  --color-accent-hover: #ff0000;

  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #eaeaea;
  --color-gray-300: #cccccc;
  --color-gray-600: #666666;
  --color-gray-800: #333333;
  --color-black: #000000;

  /* Typography */
  --font-family: 'Arial', 'Helvetica Neue', Helvetica, sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --line-height-base: 1.5;
  --line-height-tight: 1.25;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 120px;
  --nav-height: 50px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

/* -----------------------------------------------------------------------------
   CSS RESET & BASE
   ----------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: var(--line-height-base);
  color: var(--color-gray-800);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

a:hover,
a:focus {
  color: var(--color-accent-hover);
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-tight);
  color: var(--color-gray-600);
}

h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }

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

ul, ol {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

/* -----------------------------------------------------------------------------
   ACCESSIBILITY - Skip Link
   ----------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-sm) var(--spacing-md);
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* -----------------------------------------------------------------------------
   LAYOUT STRUCTURE
   ----------------------------------------------------------------------------- */
.site-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

main {
  flex: 1;
}

/* -----------------------------------------------------------------------------
   HEADER
   ----------------------------------------------------------------------------- */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  gap: var(--spacing-md);
}

.site-logo {
  flex-shrink: 0;
}

.site-logo img {
  height: 60px;
  width: auto;
}

.header-search {
  flex: 1;
  max-width: 400px;
}

/* Search Form */
.search-form {
  display: flex;
  width: 100%;
}

.search-input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-gray-300);
  border-right: none;
  border-radius: 4px 0 0 4px;
  font-size: var(--font-size-sm);
  font-family: inherit;
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.search-button {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-primary);
  color: var(--color-white);
  border: 1px solid var(--color-primary);
  border-radius: 0 4px 4px 0;
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-family: inherit;
  transition: background-color var(--transition-fast);
}

.search-button:hover,
.search-button:focus {
  background-color: var(--color-primary-dark);
}

/* -----------------------------------------------------------------------------
   NAVIGATION
   ----------------------------------------------------------------------------- */
.site-nav {
  background-color: var(--color-gray-200);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-xs);
}

.nav-item {
  margin: 0;
}

.nav-link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-gray-800);
  font-weight: 500;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus,
.nav-link[aria-current="page"] {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* Mobile Navigation Toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--spacing-sm);
  cursor: pointer;
}

.nav-toggle-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-gray-800);
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: inherit;
  left: 0;
}

.nav-toggle-icon::before { top: -8px; }
.nav-toggle-icon::after { top: 8px; }

/* -----------------------------------------------------------------------------
   MAIN CONTENT
   ----------------------------------------------------------------------------- */
.page-content {
  padding: var(--spacing-xl) 0;
}

.page-title {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-gray-200);
}

/* Content Grid */
.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

/* -----------------------------------------------------------------------------
   PRODUCT CARDS & CATEGORY BOXES
   ----------------------------------------------------------------------------- */
.category-box {
  background-color: var(--color-gray-100);
  padding: var(--spacing-lg);
  border-radius: 4px;
}

.category-box h2 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  color: var(--color-gray-600);
}

.category-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.category-list li {
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--color-gray-200);
}

.category-list li:last-child {
  border-bottom: none;
}

.category-list a {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.category-list a::before {
  content: '\2022';
  color: var(--color-accent);
  font-weight: bold;
}

/* Product Card */
.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: 4px;
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}

.product-card:hover {
  box-shadow: var(--shadow-md);
}

.product-card-image {
  aspect-ratio: 16/9;
  overflow: hidden;
  background-color: var(--color-gray-100);
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.product-card-content {
  padding: var(--spacing-md);
}

.product-card-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
}

/* -----------------------------------------------------------------------------
   CALL TO ACTION
   ----------------------------------------------------------------------------- */
.cta-button {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-primary);
  color: var(--color-white);
  font-weight: 500;
  border-radius: 4px;
  transition: background-color var(--transition-fast);
}

.cta-button:hover,
.cta-button:focus {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
}

.cta-button--accent {
  background-color: var(--color-accent);
}

.cta-button--accent:hover,
.cta-button--accent:focus {
  background-color: var(--color-accent-hover);
}

/* -----------------------------------------------------------------------------
   FOOTER
   ----------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-gray-800);
  color: var(--color-white);
  padding: var(--spacing-xl) 0;
  margin-top: auto;
}

.footer-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
}

.footer-section h3 {
  color: var(--color-white);
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-md);
}

.footer-section a {
  color: var(--color-gray-300);
}

.footer-section a:hover {
  color: var(--color-white);
}

.footer-bottom {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-gray-600);
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-gray-300);
}

/* -----------------------------------------------------------------------------
   BREADCRUMBS
   ----------------------------------------------------------------------------- */
.breadcrumbs {
  padding: var(--spacing-md) 0;
  font-size: var(--font-size-sm);
}

.breadcrumbs-list {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-sm);
}

.breadcrumbs-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.breadcrumbs-item:not(:last-child)::after {
  content: '/';
  color: var(--color-gray-300);
}

.breadcrumbs-item[aria-current="page"] {
  color: var(--color-gray-600);
}

/* -----------------------------------------------------------------------------
   UTILITIES
   ----------------------------------------------------------------------------- */
.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;
}

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

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-md { margin-top: var(--spacing-md); }
.mb-md { margin-bottom: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }

/* -----------------------------------------------------------------------------
   RESPONSIVE BREAKPOINTS
   ----------------------------------------------------------------------------- */

/* Tablet and below */
@media (max-width: 768px) {
  :root {
    --font-size-base: 15px;
  }

  .header-inner {
    flex-wrap: wrap;
  }

  .header-search {
    order: 3;
    max-width: 100%;
    width: 100%;
  }

  .nav-toggle {
    display: block;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    width: 100%;
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-link {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-gray-300);
  }

  .content-grid {
    grid-template-columns: 1fr;
  }
}

/* Mobile */
@media (max-width: 480px) {
  :root {
    --font-size-base: 14px;
    --spacing-md: 0.75rem;
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
  }

  .site-logo img {
    height: 45px;
  }

  .page-content {
    padding: var(--spacing-lg) 0;
  }
}

/* Print Styles */
@media print {
  .site-nav,
  .nav-toggle,
  .skip-link,
  .header-search {
    display: none;
  }

  .site-footer {
    background: none;
    color: var(--color-black);
  }

  a {
    color: var(--color-black);
  }

  a[href]::after {
    content: ' (' attr(href) ')';
    font-size: var(--font-size-sm);
  }
}