/* ================================
   CARBEMAR - STYLES.CSS
   Professional aeronautical supplies website
   ================================ */

/* ================================
   CSS CUSTOM PROPERTIES
   ================================ */
:root {
  /* Colors */
  --color-primary: #0A2A43;
  --color-secondary: #5C6B74;
  --color-accent: #2F80ED;
  --color-white: #FFFFFF;
  --color-gray-light: #F5F7FA;
  --color-gray-medium: #E4E7EB;
  --color-gray-dark: #3A4550;
  --color-success: #27AE60;
  --color-error: #EB5757;
  --color-whatsapp: #25D366;
  
  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --header-height: 80px;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

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

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--color-gray-dark);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ================================
   ACCESSIBILITY
   ================================ */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  z-index: 100;
  border-radius: 0 0 var(--border-radius) 0;
}

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

/* Focus styles */
*:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

*:focus:not(:focus-visible) {
  outline: none;
}

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

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

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

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

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

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

.section {
  padding: var(--spacing-3xl) 0;
}

@media (max-width: 768px) {
  .section {
    padding: var(--spacing-2xl) 0;
  }
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  position: relative;
  padding-bottom: var(--spacing-md);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 2px;
}

/* ================================
   HEADER
   ================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: box-shadow var(--transition-normal);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--header-height);
}

.logo-img {
  height: 50px;
  width: auto;
  display: block;
}

@media (max-width: 768px) {
  .logo-img {
    height: 40px;
  }
}

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

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  position: relative;
  transition: background var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: transform var(--transition-fast);
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  bottom: -8px;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-list a {
  color: var(--color-gray-dark);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-xs) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-fast);
}

.nav-list a:hover::after {
  width: 100%;
}

.nav-cta {
  background: var(--color-accent);
  color: var(--color-white) !important;
  padding: var(--spacing-xs) var(--spacing-md) !important;
  border-radius: var(--border-radius);
  transition: background var(--transition-fast);
}

.nav-cta:hover {
  background: var(--color-primary);
}

.nav-cta::after {
  display: none;
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  
  .nav-list {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
  }
  
  .nav-list.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-list a {
    width: 100%;
    padding: var(--spacing-sm);
    text-align: center;
  }
}

/* ================================
   HERO SECTION
   ================================ */
.hero {
  margin-top: var(--header-height);
  background: linear-gradient(135deg, var(--color-primary) 0%, #0d3a5c 100%);
  color: var(--color-white);
  padding: var(--spacing-3xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><path d="M0 0h100v100H0z" fill="none"/><path d="M50 0L100 50L50 100L0 50z" fill="%23ffffff" opacity="0.03"/></svg>');
  background-size: 100px 100px;
}

/* Hero with custom background image */
.hero-with-image {
  background-image: linear-gradient(rgba(10, 42, 67, 0.85), rgba(13, 58, 92, 0.85)), url('https://images.unsplash.com/photo-1586864387634-1a85c0b60cf1?q=80&w=2000');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

.hero-with-image::before {
  display: none;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 42, 67, 0.75);
  z-index: 0;
}

@media (max-width: 768px) {
  .hero-with-image {
    background-attachment: scroll;
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero-title {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  margin-bottom: var(--spacing-xl);
  opacity: 0.9;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ================================
   BUTTONS
   ================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius);
  font-weight: var(--font-weight-semibold);
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-fast);
  text-decoration: none;
  min-width: 160px;
}

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

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

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

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

.btn-whatsapp {
  background: var(--color-whatsapp);
  color: var(--color-white);
  border-color: var(--color-whatsapp);
  gap: var(--spacing-xs);
}

.btn-whatsapp:hover {
  background: #128C7E;
  border-color: #128C7E;
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ================================
   ABOUT SECTION
   ================================ */
.about {
  background: var(--color-white);
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
}

.about-text {
  font-size: 1.125rem;
  text-align: center;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.8;
}

.features-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  list-style: none;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--color-gray-light);
  border-radius: var(--border-radius);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.feature-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-item svg {
  flex-shrink: 0;
}

.feature-item span {
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
}

/* ================================
   BRANDS SECTION
   ================================ */
.brands {
  background: var(--color-gray-light);
}

.brands-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

@media (max-width: 1024px) {
  .brands-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

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

@media (max-width: 480px) {
  .brands-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Center last row items (LPS and Sherwin-Williams) */
.brand-card-centered {
  grid-column: span 1;
}

.brands-grid .brand-card:nth-last-child(2):nth-child(11) {
  grid-column: 2 / 3;
}

.brands-grid .brand-card:nth-last-child(1):nth-child(12) {
  grid-column: 4 / 5;
}

@media (max-width: 1024px) {
  .brands-grid .brand-card:nth-last-child(2):nth-child(11),
  .brands-grid .brand-card:nth-last-child(1):nth-child(12) {
    grid-column: auto;
  }
}

.brand-card {
  background: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 120px;
}

.brand-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.brand-card img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

.brands-note {
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-secondary);
  font-style: italic;
}

/* ================================
   PRODUCTS SECTION
   ================================ */
.products {
  background: var(--color-white);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.product-card {
  background: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  border: 2px solid var(--color-gray-medium);
  transition: all var(--transition-fast);
  text-align: center;
}

.product-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.product-icon {
  margin-bottom: var(--spacing-md);
  display: flex;
  justify-content: center;
}

.product-title {
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.product-description {
  color: var(--color-secondary);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ================================
   SECTORS SECTION
   ================================ */
.sectors {
  background: var(--color-gray-light);
}

.sectors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.sector-card {
  background: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  text-align: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.sector-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.sector-icon {
  margin-bottom: var(--spacing-md);
  display: flex;
  justify-content: center;
}

.sector-title {
  margin-bottom: var(--spacing-sm);
  font-size: 1.25rem;
}

.sector-description {
  color: var(--color-secondary);
  margin-bottom: 0;
}

/* ================================
   CONTACT SECTION
   ================================ */
.contact {
  background: var(--color-white);
}

.contact-simple {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--color-gray-light);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
}

.contact-message {
  text-align: center;
  font-size: 1.5rem;
  margin-bottom: 0.8rem;
}

.contact-emails {
  text-align: center;
  line-height: 2;
}

.contact-email {
  display: block;
  color: #2F80ED;
  text-decoration: none;
  font-weight: 500;
  font-size: 1.5rem;
}

.contact-email:hover {
  text-decoration: underline;
}

.contact-phone-text {
  text-align: center;
  font-size: 1.5rem;
  margin-top: 1.5rem;
  margin-bottom: 0.8rem;
}

.contact-phones {
  text-align: center;
  line-height: 2;
}

.contact-phone {
  display: block;
  color: #2F80ED;
  text-decoration: none;
  font-weight: 500;
  font-size: 1.5rem;
}

.contact-phone:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .contact-message,
  .contact-phone-text {
    font-size: 1.125rem;
  }
  
  .contact-email,
  .contact-phone {
    font-size: 1.125rem;
  }
}

/* ================================
   FOOTER
   ================================ */
.footer {
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-xl) 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-copy {
  margin: 0;
  opacity: 0.9;
}

.footer-nav {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
  flex-wrap: wrap;
}

.footer-link {
  color: var(--color-white);
  opacity: 0.9;
  transition: opacity var(--transition-fast);
}

.footer-link:hover {
  opacity: 1;
  color: var(--color-white);
}

.footer-separator {
  opacity: 0.5;
}

@media (max-width: 768px) {
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

/* ================================
   UTILITY CLASSES
   ================================ */
.text-center {
  text-align: center;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

/* ================================
   ANIMATIONS
   ================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

/* ================================
   PRINT STYLES
   ================================ */
@media print {
  .header,
  .whatsapp-float,
  .nav,
  .footer-nav {
    display: none;
  }
  
  .section {
    page-break-inside: avoid;
  }
  
  a {
    text-decoration: underline;
  }
  
  a[href^="http"]::after {
    content: " (" attr(href) ")";
  }
}