/* 1. RESET & BASE STYLES (MOBILE-FIRST APPROACH)*/

:root {
  --primary-color: #e53935;
  --secondary-color: #ffd600;
  --dark-bg: #23272f;
  --text-color: #333;
  --light-gray: #f5f6fa;
  --white: #fff;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  --primary-color-alpha-08: rgba(229, 57, 53, 0.08);
  --primary-color-alpha-10: rgba(229, 57, 53, 0.1);
  --primary-color-alpha-18: rgba(229, 57, 53, 0.18);
  --primary-color-alpha-20: rgba(229, 57, 53, 0.2);
  --secondary-color-alpha-33: rgba(255, 214, 0, 0.33);
  --primary-color-hover: #c62828;
  --secondary-color-hover: #ffc107;
  --gray-text-color: #666;
  --dark-gray-text-color: #222;
  --border-color: #eee;
  --light-bg-secondary: #fafbfc;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: "Roboto", Arial, sans-serif;
  background: var(--light-gray);
  color: var(--text-color);
  line-height: 1.6;
}
a {
  color: inherit;
  text-decoration: none;
}
ul {
  list-style: none;
}
img {
  max-width: 100%;
  display: block;
}

/* 2. LAYOUT & HEADER (MOBILE-FIRST) */

.header-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 13px;
  background: var(--dark-gray-text-color);
  color: var(--white);
  text-align: center;
}
.header-user a {
  color: var(--secondary-color);
  font-weight: 500;
}
.header-user .cart-icon {
  font-size: 20px;
  position: relative;
  margin-left: 12px;
  color: var(--white);
}
.header-user .cart-icon span {
  background: var(--secondary-color);
  color: var(--primary-color);
  border-radius: 50%;
  font-size: 11px;
  padding: 2px 5px;
  position: absolute;
  top: -8px;
  right: -12px;
  font-weight: bold;
}
.header-main {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--primary-color);
  color: var(--white);
}
.logo img {
  width: 150px;
  height: auto;
  object-fit: contain;
}
.search-bar {
  display: flex;
  width: 100%;
}
.search-bar input {
  flex-grow: 1;
  padding: 10px 12px;
  border: 1px solid var(--white);
  border-radius: 4px 0 0 4px;
  outline: none;
  font-size: 14px;
  background: rgba(255, 255, 255, 0.15);
  color: var(--white);
}
.search-bar input::placeholder {
  color: #ffeaea;
}
.search-bar button {
  padding: 10px 14px;
  border: none;
  background: var(--secondary-color);
  color: var(--primary-color);
  border-radius: 0 4px 4px 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: bold;
  transition: background 0.2s;
}
.search-bar button:hover {
  background: var(--secondary-color-hover);
}

/* Header menu buttons */
#fixed-header-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 24px;
  cursor: pointer;
  padding: 0 16px 0 0;
}
.header-main.scrolled #fixed-header-menu-btn {
  display: block;
}
.sidebar-toggle {
  display: block;
  background: var(--white);
  color: var(--primary-color);
  border: 1px solid var(--border-color);
  font-size: 16px;
  font-weight: 700;
  padding: 10px 16px;
  border-radius: 6px;
  margin-bottom: 16px;
  cursor: pointer;
  box-shadow: var(--shadow);
  width: auto;
  margin-right: 12px;
}
.header-main.scrolled .sidebar-toggle {
  display: none;
}

/* Sticky Header Effect */
.header-main.scrolled {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2001;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  animation: slideDown 0.35s ease-in-out;
}
@keyframes slideDown {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.main-layout {
  padding: 16px;
  min-height: 290px;
}

/* =================================================================== */
/* 3. SIDEBAR STYLES (MOBILE-FIRST)                                    */
/* =================================================================== */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 80vw;
  max-width: 300px;
  background: var(--white);
  z-index: 1200;
  box-shadow: 4px 0 15px rgba(0, 0, 0, 0.1);
  padding: 20px;
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform 0.3s ease-in-out;
}
.sidebar.active {
  transform: translateX(0);
}
.sidebar-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1198;
}
.sidebar h3 {
  font-size: 20px;
  margin-bottom: 16px;
  color: var(--primary-color);
}
.nav-categories a {
  display: block;
  padding: 10px 12px;
  border-radius: 6px;
  font-weight: 500;
  font-size: 15px;
  transition: background 0.2s, color 0.2s;
  margin-bottom: 4px;
}
.nav-categories a:hover,
.nav-categories .category.active {
  background: var(--secondary-color);
  color: var(--primary-color);
  font-weight: 700;
}

/* =================================================================== */
/* 4. MAIN CONTENT & BANNERS                                           */
/* =================================================================== */

.banner-row {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 16px;
}
.banner-main,
.banner-side-item,
.banner-sub-item {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.banner-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.banner-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.banner-side-item {
  background: var(--white);
  padding: 12px;
}
.banner-side-text h4 {
  font-size: 15px;
  margin-bottom: 2px;
}
.showroom-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 16px 0;
  padding: 12px;
  background: var(--white);
  border-radius: 8px;
  font-size: 14px;
}

/* Banner Slider */
.banner-slider {
  position: relative;
  width: 100%;
  height: 360px;
  overflow: hidden;
  border-radius: 12px;
}
.banner-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.5s;
  object-fit: cover;
  z-index: 1;
  pointer-events: none;
}
.banner-slide.active {
  opacity: 1;
  z-index: 2;
  pointer-events: auto;
}
.banner-prev,
.banner-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.3);
  color: var(--white);
  border: none;
  font-size: 2rem;
  padding: 0 12px;
  border-radius: 50%;
  cursor: pointer;
  z-index: 10;
  transition: background 0.2s;
}
.banner-prev:hover,
.banner-next:hover {
  background: rgba(0, 0, 0, 0.6);
}
.banner-prev {
  left: 12px;
}
.banner-next {
  right: 12px;
}
.banner-dots {
  position: absolute;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 10;
}
.banner-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--white);
  opacity: 0.5;
  cursor: pointer;
  transition: opacity 0.2s, background 0.2s;
}
.banner-dot.active {
  background: var(--primary-color);
  opacity: 1;
}

/* Sub Banners */
.banner-sub {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 24px;
  padding: 0 16px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}
.banner-sub-item img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

/* =================================================================== */
/* 5. PRODUCT LISTINGS (SHARED STYLES)                                 */
/* =================================================================== */

.products,
.flash-sale,
.suggested-builds,
.products-by-category,
.featured-brands {
  background: var(--white);
  border-radius: 8px;
  padding: 16px;
  margin: 24px auto;
  max-width: 1200px;
  box-shadow: var(--shadow);
}
.products h2,
.flash-sale h2,
.suggested-builds h2,
.products-by-category h2,
.featured-brands h2 {
  color: var(--primary-color);
  font-size: 22px;
  margin-bottom: 16px;
  text-align: center;
}

/* General product-grid styling (default: flex for horizontal scrolling) */
.product-grid {
  display: flex;
  overflow-x: auto;
  gap: 20px;
  scroll-snap-type: x mandatory;
  padding-bottom: 12px;
}
.product-card {
  width: 220px;
  height: 370px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: var(--white);
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.07);
  padding: 16px 12px 14px 12px;
  text-align: left;
  transition: box-shadow 0.2s, transform 0.2s;
  scroll-snap-align: start;
  border: 1px solid var(--border-color);
}
.product-card:hover {
  box-shadow: 0 6px 24px var(--primary-color-alpha-10);
  transform: translateY(-2px) scale(1.03);
}
.product-card img {
  width: 100%;
  height: 120px;
  object-fit: contain;
  margin-bottom: 10px;
}
.product-card h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--dark-gray-text-color);
  min-height: 36px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
}
.product-card .price,
.product-card .flash-sale-price {
  color: var(--primary-color);
  font-weight: bold;
  margin-bottom: 8px;
  font-size: 15px;
}
.product-card .old-price {
  color: var(--gray-text-color);
  text-decoration: line-through;
  font-size: 13px;
  margin-bottom: 2px;
  display: block;
}
.product-card .buy-btn {
  background: var(--secondary-color);
  color: var(--text-color);
  border: none;
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: auto;
  align-self: stretch;
}
.product-card .buy-btn:hover {
  background: var(--secondary-color-hover);
}
.buy-btn.added {
  background: #4caf50 !important;
  color: var(--white) !important;
}

/* Product Grid Scroll Buttons (only for horizontally scrolling grids) */
.product-grid-scroll-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 20;
  background: none;
  border: none;
  padding: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  opacity: 0.96;
  transition: box-shadow 0.2s, opacity 0.2s;
  outline: none;
}
.product-grid-scroll-btn:hover {
  box-shadow: 0 4px 16px var(--primary-color-alpha-18);
}
#featured-products-slider-left {
  left: -22px;
}
#featured-products-slider-right {
  right: -22px;
}

/* Flash Sale Specific Grid Layout (always grid) */
.flash-sale-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  overflow-x: unset;
  padding-bottom: 0;
  gap: 16px;
}

/* =================================================================== */
/* 6. SUGGESTED BUILDS                                                 */
/* =================================================================== */

.suggested-builds {
  padding: 24px 16px;
}
.suggested-builds h2 {
  margin-bottom: 20px;
}
.builds-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.suggested-build-card {
  background: var(--light-bg-secondary);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  padding: 20px 18px 18px 18px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: box-shadow 0.2s, transform 0.2s;
  border: 1px solid var(--border-color);
}
.suggested-build-card:hover {
  box-shadow: 0 4px 16px var(--primary-color-alpha-08);
  transform: translateY(-2px) scale(1.01);
}
.suggested-build-title {
  font-size: 18px;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 10px;
}
.suggested-build-list {
  margin-bottom: 12px;
  padding-left: 18px;
}
.suggested-build-list li {
  font-size: 15px;
  margin-bottom: 4px;
  color: #444;
}
.suggested-build-price {
  font-size: 16px;
  font-weight: bold;
  color: var(--secondary-color);
  margin-bottom: 10px;
}
.suggested-build-btn {
  background: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: 5px;
  padding: 8px 18px;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: auto;
}
.suggested-build-btn:hover {
  background: var(--primary-color-hover);
}

/* Featured Brands */
.featured-brands {
  padding: 24px 16px;
}
.brands-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  justify-items: center;
  align-items: center;
}
.brand-item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
  background: var(--white);
  height: 80px;
}
.brand-item:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
.brand-item img {
  max-width: 100px;
  max-height: 60px;
  object-fit: contain;
}

/* =================================================================== */
/* 7. FOOTER                                                           */
/* =================================================================== */

.footer {
  background: var(--white);
  color: var(--text-color);
  padding-top: 32px;
  margin-top: 24px;
  border-top: none;
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.05);
}
.footer-main {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 0 16px;
}
.footer-col h4 {
  color: var(--primary-color);
  font-size: 18px;
  margin-bottom: 12px;
}
.footer-col ul li {
  margin-bottom: 8px;
  font-size: 14px;
}
.footer-col ul li a {
  color: var(--gray-text-color);
  transition: color 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-col ul li a:hover {
  color: var(--primary-color);
  text-decoration: underline;
}
.footer-col ul li i {
  color: var(--primary-color);
}
.footer-bottom {
  text-align: center;
  font-size: 13px;
  padding: 16px 0;
  margin-top: 24px;
  background: var(--light-gray);
  color: var(--gray-text-color);
  border-top: 1px solid var(--border-color);
}
.social-connect .social-icons {
  display: flex;
  gap: 15px;
  margin-top: 10px;
}
.social-connect .social-icons a {
  font-size: 24px;
  color: var(--gray-text-color);
  transition: color 0.2s, transform 0.2s;
}
.social-connect .social-icons a:hover {
  color: var(--primary-color);
  transform: translateY(-2px);
}

/* =================================================================== */
/* 8. FLOATING UI (FAB, NOTIFICATIONS)                                 */
/* =================================================================== */

.fab-menu {
  display: flex;
  position: fixed;
  right: 18px;
  bottom: 24px;
  z-index: 2000;
  background: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: 50%;
  width: 54px;
  height: 54px;
  box-shadow: 0 4px 16px var(--primary-color-alpha-18);
  font-size: 2rem;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
}
.fab-menu:hover {
  background: var(--primary-color-hover);
}
.add-to-cart-notification {
  position: fixed;
  top: 60px;
  right: 32px;
  z-index: 9999;
  background: #4caf50;
  color: var(--white);
  padding: 10px 18px;
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  font-size: 1rem;
  opacity: 0;
  transition: opacity 0.3s;
}

/* =================================================================== */
/* 9. RESPONSIVE STYLES                                                */
/* =================================================================== */

/* Tablet Styles (>= 768px) */
@media (min-width: 768px) {
  .header-top {
    flex-direction: row;
    justify-content: space-between;
  }
  .header-main {
    justify-content: space-between;
    padding: 16px 32px;
  }
  .logo img {
    width: 100px;
  }
  .search-bar {
    width: auto;
  }
  .search-bar input {
    width: 300px;
  }
  .main-layout {
    padding: 24px 32px;
  }
  .banner-img {
    height: 280px;
  }
  .banner-side {
    grid-template-columns: repeat(3, 1fr);
  }
  .showroom-info {
    flex-direction: row;
    justify-content: center;
    gap: 24px;
  }
  .products h2,
  .flash-sale h2,
  .suggested-builds h2,
  .products-by-category h2,
  .featured-brands h2 {
    text-align: left;
  }
  .flash-sale-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  #product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    overflow-x: unset;
    padding-bottom: 0;
    gap: 20px;
  }
  .builds-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-main {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 32px;
  }
  .footer-col {
    flex: 1 1 200px;
  }
  .banner-sub {
    grid-template-columns: repeat(2, 1fr);
  }
  .brands-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Desktop Styles (>= 1024px) */
@media (min-width: 1024px) {
  .sidebar-toggle,
  #fixed-header-menu-btn,
  .sidebar-backdrop {
    display: none !important;
  }
  .main-layout {
    display: flex;
    flex-direction: row;
    gap: 24px;
    max-width: 1400px;
    margin: 32px auto;
    padding: 0 32px;
    align-items: flex-start;
  }
  .sidebar {
    position: sticky;
    top: 32px;
    z-index: 100;
    height: fit-content;
    max-height: calc(100vh - 48px);
    overflow-y: auto;
    box-shadow: var(--shadow);
    border-radius: 8px;
    background: var(--white);
    transform: translateX(0);
    transition: none;
    display: block !important;
  }
  .nav-categories {
    max-height: none !important;
    overflow: visible !important;
    transition: none !important;
  }
  .sidebar .nav-categories a {
    padding: 7px 12px;
    font-size: 14px;
    margin-bottom: 3px;
  }
  .main-content {
    flex: 1;
  }
  .banner-img {
    height: 320px;
  }
  #featured-products-slider {
    display: flex;
    overflow-x: auto;
    gap: 20px;
    scroll-snap-type: x mandatory;
    padding-bottom: 12px;
  }
  #product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  }
  .flash-sale-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .suggested-builds {
    max-width: 1400px;
  }
  .banner-sub {
    grid-template-columns: repeat(2, 1fr);
    max-width: 1400px;
  }
  .brands-grid {
    grid-template-columns: repeat(6, 1fr);
  }
  .footer-main {
    justify-content: space-between;
    gap: 20px;
  }
  .footer-col {
    flex: 1;
  }
}

/* Large Desktop Styles (>= 1440px) */
@media (min-width: 1440px) {
  #product-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  }
  .flash-sale-grid {
    grid-template-columns: repeat(5, 1fr);
  }
  .suggested-builds {
    max-width: 1400px;
  }
  .builds-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}