/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  padding: calc(120px + var(--spacing-3xl)) 0 var(--spacing-3xl);
  text-align: center;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  animation: fadeInUp 1s ease-out;
}

.hero p {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-2xl);
  opacity: 0.9;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease-out 0.4s both;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--white);
  box-shadow: var(--shadow-accent);
}

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

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

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

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

.btn-outline:hover {
  background: var(--primary-color);
  color: var(--white);
  transform: translateY(-2px);
}

/* ==========================================================================
   Cards & Components
   ========================================================================== */

.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 1px solid var(--gray-200);
}

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

.product-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 1px solid var(--gray-200);
  position: relative;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.product-card:hover::before {
  transform: scaleX(1);
}

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

.product-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(45deg, var(--gray-200), var(--gray-300));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-5xl);
  color: var(--gray-500);
  position: relative;
  overflow: hidden;
}

.product-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
}

.product-card:hover .product-image::before {
  transform: translateX(100%);
}

.product-info {
  padding: var(--spacing-2xl);
}

.product-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--gray-800);
}

.product-specs {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

.product-price {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.product-tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tag-new {
  background: #e8f5e8;
  color: #2d5a2d;
}

.tag-used {
  background: #fff3cd;
  color: #856404;
}

.tag-hot {
  background: #f8d7da;
  color: #721c24;
}

.contact-btn {
  background: var(--gradient-accent);
  color: var(--white);
  border: none;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-full);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  width: 100%;
  position: relative;
  overflow: hidden;
}

.contact-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.contact-btn:hover::before {
  left: 100%;
}

.contact-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent-hover);
}

/* ==========================================================================
   Grid Layouts
   ========================================================================== */

.grid {
  display: grid;
  gap: var(--spacing-xl);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  text-align: center;
  padding: var(--spacing-2xl);
  background: var(--gray-100);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.feature-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--gray-800);
}

.feature-desc {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* ==========================================================================
   Newsletter Section
   ========================================================================== */

.newsletter {
  background: var(--gradient-primary);
  color: var(--white);
  text-align: center;
  padding: var(--spacing-3xl) 0;
  position: relative;
  overflow: hidden;
}

.newsletter::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  z-index: 1;
}

.newsletter-content {
  position: relative;
  z-index: 2;
}

.newsletter h2 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.newsletter p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-2xl);
  opacity: 0.9;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.newsletter-form {
  display: flex;
  gap: var(--spacing-md);
  max-width: 500px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.newsletter-input {
  flex: 1;
  padding: var(--spacing-lg) var(--spacing-xl);
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
  min-width: 200px;
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.newsletter-input:focus {
  outline: none;
  background: var(--white);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.newsletter-btn {
  background: var(--gradient-accent);
  color: var(--white);
  border: none;
  padding: var(--spacing-lg) var(--spacing-xl);
  border-radius: var(--radius-full);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.newsletter-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.newsletter-btn:hover::before {
  left: 100%;
}

.newsletter-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent-hover);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  background: var(--gray-900);
  color: var(--white);
  text-align: center;
  padding: var(--spacing-2xl) 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.footer-section p,
.footer-section a {
  color: var(--gray-400);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--gray-800);
  padding-top: var(--spacing-lg);
  color: var(--gray-500);
  font-size: var(--font-size-sm);
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

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

.slide-in-up {
  animation: slideInUp 0.8s ease-out;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

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

.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);
}
.mb-5 {
  margin-bottom: var(--spacing-xl);
}

.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);
}
.mt-5 {
  margin-top: var(--spacing-xl);
}

.p-0 {
  padding: 0;
}
.p-1 {
  padding: var(--spacing-xs);
}
.p-2 {
  padding: var(--spacing-sm);
}
.p-3 {
  padding: var(--spacing-md);
}
.p-4 {
  padding: var(--spacing-lg);
}
.p-5 {
  padding: var(--spacing-xl);
}

.d-none {
  display: none;
}
.d-block {
  display: block;
}
.d-flex {
  display: flex;
}
.d-grid {
  display: grid;
}

.justify-center {
  justify-content: center;
}
.justify-between {
  justify-content: space-between;
}
.justify-around {
  justify-content: space-around;
}

.align-center {
  align-items: center;
}
.align-start {
  align-items: flex-start;
}
.align-end {
  align-items: flex-end;
}

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

.w-100 {
  width: 100%;
}
.h-100 {
  height: 100%;
}

.position-relative {
  position: relative;
}
.position-absolute {
  position: absolute;
}
.position-fixed {
  position: fixed;
}

.overflow-hidden {
  overflow: hidden;
}
.overflow-auto {
  overflow: auto;
}

.border-radius-sm {
  border-radius: var(--radius-sm);
}
.border-radius-md {
  border-radius: var(--radius-md);
}
.border-radius-lg {
  border-radius: var(--radius-lg);
}
.border-radius-full {
  border-radius: var(--radius-full);
}

.shadow-sm {
  box-shadow: var(--shadow-sm);
}
.shadow-md {
  box-shadow: var(--shadow-md);
}
.shadow-lg {
  box-shadow: var(--shadow-lg);
}
.shadow-xl {
  box-shadow: var(--shadow-xl);
}

/* ==========================================================================
   Loading States
   ========================================================================== */

.loading {
  opacity: 0.6;
  pointer-events: none;
  position: relative;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--gray-300);
  border-top: 2px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* ==========================================================================
   Messages
   ========================================================================== */

.message {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-md) 0;
  font-weight: 500;
  border: 1px solid transparent;
  transition: all var(--transition-normal);
}

.message.success {
  background: #d4edda;
  color: #155724;
  border-color: #c3e6cb;
}

.message.error {
  background: #f8d7da;
  color: #721c24;
  border-color: #f5c6cb;
}

.message.warning {
  background: #fff3cd;
  color: #856404;
  border-color: #ffeaa7;
}

.message.info {
  background: #d1ecf1;
  color: #0c5460;
  border-color: #bee5eb;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 1200px) {
  .container {
    max-width: 960px;
  }
}

@media (max-width: 992px) {
  .container {
    max-width: 720px;
  }

  .hero h1 {
    font-size: var(--font-size-4xl);
  }

  .hero p {
    font-size: var(--font-size-lg);
  }

  .section-title {
    font-size: var(--font-size-3xl);
  }
}

@media (max-width: 768px) {
  .container {
    max-width: 540px;
    padding: 0 var(--spacing-lg);
  }

  .hero {
    padding: calc(100px + var(--spacing-2xl)) 0 var(--spacing-2xl);
  }

  .hero h1 {
    font-size: var(--font-size-3xl);
  }

  .hero p {
    font-size: var(--font-size-base);
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .section-title {
    font-size: var(--font-size-2xl);
  }

  .newsletter-form {
    flex-direction: column;
  }

  .newsletter-input {
    min-width: auto;
  }

  .header-content {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .nav-menu {
    flex-direction: column;
    gap: var(--spacing-md);
  }

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

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

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 576px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .hero h1 {
    font-size: var(--font-size-2xl);
  }

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

  .card {
    padding: var(--spacing-lg);
  }

  .product-info {
    padding: var(--spacing-lg);
  }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
  .header,
  .newsletter,
  .footer {
    display: none;
  }

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

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

  .card {
    box-shadow: none;
    border: 1px solid var(--gray-300);
  }
}

/* ==========================================================================
   High Contrast Mode
   ========================================================================== */

@media (prefers-contrast: high) {
  :root {
    --primary-color: #000080;
    --secondary-color: #800080;
    --accent-color: #008000;
    --text-primary: #000000;
    --text-secondary: #333333;
    --white: #ffffff;
  }

  .card,
  .product-card,
  .feature-card {
    border: 2px solid var(--text-primary);
  }
}