/* ============================================
   TECH HOUSE - MAIN STYLESHEET
   Modern E-Commerce Design
   ============================================ */

/* CSS Variables - Color Scheme */
:root {
  --primary-color: #e91e63;
  --secondary-color: #667eea;
  --white: #ffffff;
  --light-gray: #f5f5f5;
  --medium-gray: #e0e0e0;
  --dark-gray: #333333;
  --text-color: #333333;
  --border-color: #e0e0e0;
  --success-color: #4caf50;
  --error-color: #f44336;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  color: var(--text-color);
  background-color: var(--white);
  line-height: 1.6;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ============================================
   TOP BAR
   ============================================ */
.top-bar {
  background-color: var(--dark-gray);
  color: var(--white);
  padding: 10px 0;
  font-size: 14px;
}

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

@media (max-width: 768px) {
  .top-bar-content {
    flex-direction: column;
    gap: 5px;
  }
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
  background-color: var(--white);
  border-bottom: 2px solid var(--medium-gray);
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
}

.logo h1 {
  font-size: 24px;
  color: var(--primary-color);
  white-space: nowrap;
}

.nav {
  display: flex;
  gap: 25px;
  flex: 1;
  justify-content: center;
}

.nav-link {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  padding: 8px 12px;
  border-radius: var(--radius);
  transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  background-color: var(--light-gray);
  color: var(--primary-color);
}

.cart-link {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  background-color: var(--primary-color);
  color: var(--white);
  padding: 10px 16px;
  border-radius: var(--radius);
  font-weight: 600;
  transition: background-color 0.3s ease;
  position: relative;
  white-space: nowrap;
}

.cart-link:hover {
  background-color: #c2185b;
}

.cart-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--secondary-color);
  color: var(--white);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  font-size: 12px;
  font-weight: bold;
}

@media (max-width: 768px) {
  .header-content {
    flex-wrap: wrap;
    gap: 15px;
  }
  .nav {
    gap: 12px;
    order: 3;
    width: 100%;
  }
  .nav-link {
    padding: 6px 10px;
    font-size: 14px;
  }
  .cart-link {
    order: 2;
  }
}

/* ============================================
   BREADCRUMB
   ============================================ */
.breadcrumb {
  background-color: var(--light-gray);
  padding: 12px 0;
  margin-bottom: 30px;
  font-size: 14px;
}

.breadcrumb a {
  color: var(--secondary-color);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: var(--white);
  padding: 80px 20px;
  text-align: center;
  margin-bottom: 50px;
  border-radius: var(--radius);
}

.hero-content h2 {
  font-size: 48px;
  margin-bottom: 15px;
  font-weight: 700;
}

.hero-content p {
  font-size: 20px;
  margin-bottom: 30px;
  opacity: 0.95;
}

@media (max-width: 768px) {
  .hero {
    padding: 50px 20px;
  }
  .hero-content h2 {
    font-size: 32px;
  }
  .hero-content p {
    font-size: 16px;
  }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s ease;
  text-align: center;
}

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

.btn-primary:hover {
  background-color: #c2185b;
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
  background-color: var(--light-gray);
}

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

.btn-white:hover {
  background-color: var(--light-gray);
}

.btn-block {
  width: 100%;
  display: block;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ============================================
   SECTIONS
   ============================================ */
section {
  margin-bottom: 50px;
}

section h2 {
  font-size: 36px;
  margin-bottom: 30px;
  text-align: center;
  color: var(--primary-color);
}

section h3 {
  font-size: 24px;
  margin-bottom: 20px;
  color: var(--dark-gray);
}

/* ============================================
   PRODUCT GRID
   ============================================ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 25px;
}

.product-card {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  box-shadow: var(--shadow);
}

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

.product-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background-color: var(--error-color);
  color: var(--white);
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: bold;
}

.product-badge.sale {
  background-color: var(--primary-color);
}

.product-icon {
  font-size: 60px;
  margin-bottom: 15px;
}

.product-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--dark-gray);
}

.brand {
  color: var(--secondary-color);
  font-size: 14px;
  margin-bottom: 12px;
}

.price-section {
  margin: 15px 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
}

.price {
  font-size: 24px;
  font-weight: bold;
  color: var(--primary-color);
}

.old-price {
  font-size: 16px;
  color: var(--medium-gray);
  text-decoration: line-through;
}

.product-card button {
  width: 100%;
  margin-top: 15px;
}

/* ============================================
   CATEGORIES SECTION
   ============================================ */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 20px;
}

.category-card {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--white);
  padding: 30px;
  border-radius: var(--radius);
  text-align: center;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  box-shadow: var(--shadow);
}

.category-card:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.category-icon {
  font-size: 48px;
  display: block;
  margin-bottom: 10px;
}

.category-card h3 {
  color: var(--white);
  margin: 0;
}

/* ============================================
   PROMOTIONS SECTION
   ============================================ */
.promotions-section .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 25px;
}

.promo-card {
  padding: 40px;
  border-radius: var(--radius);
  text-align: center;
  color: var(--white);
}

.promo-primary {
  background: linear-gradient(135deg, var(--primary-color), #ff69b4);
}

.promo-secondary {
  background: linear-gradient(135deg, var(--secondary-color), #8a9ff5);
}

.promo-card h3 {
  font-size: 28px;
  color: var(--white);
  margin-bottom: 10px;
}

.promo-card p {
  font-size: 16px;
  margin-bottom: 20px;
}

/* ============================================
   PRODUCTS PAGE - SIDEBAR
   ============================================ */
.products-wrapper {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 30px;
}

.sidebar {
  background-color: var(--light-gray);
  padding: 20px;
  border-radius: var(--radius);
  height: fit-content;
}

.sidebar h3 {
  margin-top: 0;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.filter-btn {
  background-color: var(--white);
  border: 2px solid var(--border-color);
  color: var(--text-color);
  padding: 10px 15px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: left;
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--white);
}

.products-section {
  padding-top: 0;
}

@media (max-width: 768px) {
  .products-wrapper {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: none;
  }
}

/* ============================================
   PRODUCT DETAIL PAGE
   ============================================ */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin: 30px 0;
}

.product-detail-image {
  background-color: var(--light-gray);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  font-size: 100px;
}

.product-detail-info h2 {
  text-align: left;
  margin-bottom: 10px;
}

.detail-brand {
  color: var(--secondary-color);
  font-size: 16px;
  margin-bottom: 15px;
}

.detail-price {
  font-size: 32px;
  color: var(--primary-color);
  font-weight: bold;
  margin-bottom: 20px;
}

.detail-rating {
  margin-bottom: 20px;
}

.detail-description {
  color: var(--text-color);
  line-height: 1.8;
  margin-bottom: 20px;
}

.detail-specs {
  background-color: var(--light-gray);
  padding: 20px;
  border-radius: var(--radius);
  margin-bottom: 20px;
}

.detail-specs ul {
  list-style: none;
}

.detail-specs li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
}

.detail-specs li:last-child {
  border-bottom: none;
}

.warranty-info {
  background-color: #f0f7ff;
  border-left: 4px solid var(--secondary-color);
  padding: 15px;
  border-radius: var(--radius);
  margin-bottom: 20px;
}

.quantity-selector {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.quantity-selector button {
  background-color: var(--light-gray);
  border: 1px solid var(--border-color);
  padding: 8px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
}

.quantity-selector input {
  width: 60px;
  padding: 8px;
  text-align: center;
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

@media (max-width: 768px) {
  .product-detail {
    grid-template-columns: 1fr;
  }
  .product-detail-image {
    order: -1;
  }
}

/* ============================================
   CART PAGE
   ============================================ */
.cart-wrapper {
  display: grid;
  grid-template-columns: 1fr 350px;
  gap: 30px;
  margin-bottom: 30px;
}

.cart-items {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
}

.cart-empty {
  text-align: center;
  padding: 50px 20px;
  color: var(--medium-gray);
}

.cart-empty-icon {
  font-size: 80px;
  margin-bottom: 20px;
}

.cart-item {
  display: grid;
  grid-template-columns: 100px 1fr 100px 100px 50px;
  gap: 20px;
  align-items: center;
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.cart-item-image {
  background-color: var(--light-gray);
  padding: 20px;
  border-radius: var(--radius);
  text-align: center;
  font-size: 40px;
}

.cart-item-details h4 {
  margin: 0 0 5px 0;
}

.cart-item-details p {
  margin: 0;
  color: var(--secondary-color);
  font-size: 14px;
}

.cart-item-price {
  text-align: right;
}

.cart-item-quantity input {
  width: 50px;
  padding: 6px;
  text-align: center;
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

.cart-item-remove {
  background-color: var(--error-color);
  color: var(--white);
  border: none;
  padding: 6px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
}

.cart-item-remove:hover {
  background-color: #d32f2f;
}

.cart-summary {
  background-color: var(--light-gray);
  padding: 20px;
  border-radius: var(--radius);
  height: fit-content;
}

.cart-summary h3 {
  margin-top: 0;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.summary-row.total {
  font-weight: bold;
  font-size: 18px;
  border-bottom: 2px solid var(--primary-color);
  margin-bottom: 20px;
}

@media (max-width: 768px) {
  .cart-wrapper {
    grid-template-columns: 1fr;
  }
  .cart-item {
    grid-template-columns: 80px 1fr;
    gap: 10px;
  }
  .cart-item-price,
  .cart-item-quantity,
  .cart-item-remove {
    display: none;
  }
}

/* ============================================
   CHECKOUT PAGE
   ============================================ */
.checkout-wrapper {
  display: grid;
  grid-template-columns: 1fr 350px;
  gap: 30px;
  margin-bottom: 30px;
}

.checkout-form {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 30px;
}

.form-section {
  margin-bottom: 30px;
}

.form-section h3 {
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: 10px;
  margin-top: 0;
}

.form-group {
  margin-bottom: 15px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  color: var(--dark-gray);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 16px;
}

.form-group textarea {
  resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(233, 30, 99, 0.1);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 15px;
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.radio-option {
  display: flex;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.3s ease;
}

.radio-option:hover {
  background-color: var(--light-gray);
}

.radio-option input {
  margin-right: 10px;
  margin-bottom: 0;
  width: auto;
}

.checkout-summary {
  background-color: var(--light-gray);
  padding: 20px;
  border-radius: var(--radius);
  height: fit-content;
}

.checkout-summary h3 {
  margin-top: 0;
}

.summary-items {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  max-height: 200px;
  overflow-y: auto;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
  font-size: 14px;
}

@media (max-width: 768px) {
  .checkout-wrapper {
    grid-template-columns: 1fr;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   MEMBERSHIP PAGE
   ============================================ */
.membership-intro {
  text-align: center;
  margin-bottom: 40px;
}

.membership-intro h2 {
  font-size: 40px;
}

.membership-intro p {
  font-size: 18px;
  color: var(--medium-gray);
}

.membership-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
}

.membership-card {
  background-color: var(--white);
  border: 2px solid var(--border-color);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
}

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

.membership-card.featured {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(233, 30, 99, 0.1);
}

.membership-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--primary-color);
  color: var(--white);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: bold;
}

.membership-header {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--border-color);
}

.membership-header h3 {
  margin: 0;
  font-size: 24px;
}

.membership-header .price {
  font-size: 32px;
  color: var(--primary-color);
  font-weight: bold;
  margin-top: 10px;
}

.membership-header .price span {
  font-size: 16px;
  color: var(--medium-gray);
}

.features-list {
  list-style: none;
  margin-bottom: 25px;
}

.features-list li {
  padding: 10px 0;
  text-align: left;
}

/* ============================================
   ABOUT PAGE
   ============================================ */
.about-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 50px;
}

.about-text p {
  margin-bottom: 15px;
  font-size: 16px;
  line-height: 1.8;
}

.about-image {
  text-align: center;
}

.placeholder-image {
  background-color: var(--light-gray);
  border-radius: var(--radius);
  padding: 100px 20px;
  font-size: 100px;
}

.stats-section {
  margin-bottom: 50px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.stat-card {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--white);
  padding: 30px;
  border-radius: var(--radius);
  text-align: center;
}

.stat-card h4 {
  font-size: 40px;
  margin: 0 0 10px 0;
}

.stat-card p {
  margin: 0;
  font-size: 14px;
}

.services-section,
.locations-section {
  margin-bottom: 50px;
}

.services-grid,
.locations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.service-card,
.location-card {
  background-color: var(--light-gray);
  padding: 25px;
  border-radius: var(--radius);
  border-left: 4px solid var(--primary-color);
}

.location-card {
  border-left-color: var(--secondary-color);
}

@media (max-width: 768px) {
  .about-section {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   CONTACT PAGE
   ============================================ */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 350px;
  gap: 30px;
  margin-bottom: 30px;
}

.contact-form {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 30px;
}

.contact-form h3 {
  margin-top: 0;
}

.contact-info {
  background-color: var(--light-gray);
  padding: 20px;
  border-radius: var(--radius);
  height: fit-content;
}

.info-item {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.info-item:last-child {
  border-bottom: none;
}

.info-item h4 {
  margin: 0 0 8px 0;
  color: var(--primary-color);
}

.info-item p {
  margin: 0;
  line-height: 1.6;
}

.map-placeholder {
  background-color: var(--white);
  border: 2px dashed var(--border-color);
  padding: 40px;
  text-align: center;
  border-radius: var(--radius);
  color: var(--medium-gray);
}

@media (max-width: 768px) {
  .contact-wrapper {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background-color: var(--dark-gray);
  color: var(--white);
  padding: 40px 0 20px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.footer-column h4 {
  margin-bottom: 15px;
  color: var(--primary-color);
}

.footer-column p {
  margin-bottom: 10px;
  font-size: 14px;
}

.footer-column ul {
  list-style: none;
}

.footer-column ul li {
  margin-bottom: 8px;
}

.footer-column a {
  color: #ccc;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  border-top: 1px solid #555;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
}

.back-to-top {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.back-to-top:hover {
  color: #ff69b4;
}

@media (max-width: 768px) {
  .footer-bottom {
    flex-direction: column;
    gap: 15px;
    text-align: center;
  }
}

/* ============================================
   NOTIFICATIONS
   ============================================ */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 16px 24px;
  border-radius: var(--radius);
  background-color: var(--success-color);
  color: var(--white);
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
  z-index: 1000;
}

.notification.error {
  background-color: var(--error-color);
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

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

.mt-20 {
  margin-top: 20px;
}

.mb-20 {
  margin-bottom: 20px;
}

@media (max-width: 768px) {
  .container {
    padding: 0 15px;
  }
}