:root {
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --accent: #fbbf24;
  --accent-hover: #f59e0b;
  --bg-dark: #0b0f19;
  --bg-card: #131b2e;
  --bg-card-light: #1e293b;
  --text-main: #ffffff;
  --text-muted: #cbd5e1;
  --success: #34d399;
  --warning: #f87171;
  --border: #334155;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.6), 0 8px 10px -6px rgba(0, 0, 0, 0.6);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Nav */
.header {
  background-color: #ffffff;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #e2e8f0;
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0.75rem 1.5rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.nav-container {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: #0f172a;
}

.logo-img {
  height: 52px;
  width: auto;
}

/* Desktop & Mobile Menu */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.mobile-menu-toggle {
  display: none;
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  color: #0f172a;
  font-size: 1.5rem;
  padding: 0.4rem 0.8rem;
  border-radius: 0.5rem;
  cursor: pointer;
}

@media (max-width: 900px) {
  .mobile-menu-toggle {
    display: block;
  }
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    padding: 1rem;
    box-shadow: var(--shadow);
    gap: 0.75rem;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-btn {
    width: 100%;
    justify-content: flex-start;
  }
}

.nav-btn {
  background: transparent;
  color: var(--primary-hover);
  border: 1px solid transparent;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-btn:hover, .nav-btn.active {
  color: #1d4ed8;
  background-color: #eff6ff;
  border-color: #bfdbfe;
}

.nav-btn.admin-nav-btn {
  border-color: rgba(245, 158, 11, 0.4);
  color: var(--accent);
}

.nav-btn.admin-nav-btn:hover, .nav-btn.admin-nav-btn.active {
  background-color: var(--accent);
  color: #000;
}

.cart-btn {
  background-color: var(--primary);
  color: #fff;
  border: none;
  position: relative;
}

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

.badge {
  background-color: var(--accent);
  color: #000;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  margin-left: 0.3rem;
}

/* Hero Section */
.hero {
  background: url('/assets/websitebanner.jpg') no-repeat center center;
  background-size: cover;
  width: 100%;
  aspect-ratio: 4128 / 1024;
  min-height: 320px;
  border-bottom: 1px solid var(--border);
  position: relative;
  display: flex;
  align-items: center;
  padding: 1.25rem 1.5rem;
}

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

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: #fff;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.pricing-highlights {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.price-pill {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0.75rem 1.25rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: var(--shadow);
}

.price-pill .amount {
  color: var(--accent);
  font-weight: 800;
  font-size: 1.2rem;
}

/* Main Container */
.main-container {
  max-width: 1300px;
  margin: 2rem auto;
  padding: 0 1.5rem;
  width: 100%;
  flex: 1;
}

.page-view {
  display: none;
}

.page-view.active {
  display: block;
}

/* Section Titles */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
}

/* Filter Bar */
.filter-bar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-chip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.4rem 1rem;
  border-radius: 2rem;
  font-size: 0.875rem;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s ease;
}

.filter-chip.active, .filter-chip:hover {
  background-color: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Product Grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.product-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: var(--shadow);
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: #475569;
}

.product-img-wrapper {
  height: 200px;
  background-color: #020617;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  position: relative;
}

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

.stock-tag {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(248, 113, 113, 0.2);
  color: var(--warning);
  border: 1px solid var(--warning);
  padding: 0.2rem 0.6rem;
  border-radius: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
}

.product-card.unavailable {
  background-color: rgba(239, 68, 68, 0.08);
  border: 1.5px solid #ef4444;
  opacity: 0.85;
  position: relative;
}

.product-card.unavailable .product-img-wrapper {
  background-color: rgba(239, 68, 68, 0.15);
}

.unavailable-overlay-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background: #ef4444;
  color: #ffffff;
  font-weight: 800;
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 0.4rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
  letter-spacing: 0.03em;
  z-index: 2;
}

.unavailable-banner {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid #ef4444;
  color: #f87171;
  text-align: center;
  padding: 0.6rem;
  border-radius: 0.5rem;
  font-weight: 700;
  font-size: 0.85rem;
  margin-top: auto;
}

.product-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: #fff;
}

.product-description {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.product-specs {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  background: var(--bg-dark);
  padding: 0.5rem;
  border-radius: 0.4rem;
  border: 1px dashed var(--border);
}

.qty-selector-catalog {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.qty-input-small {
  width: 70px !important;
  padding: 0.3rem 0.5rem !important;
  text-align: center;
}

.product-prices {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1.25rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.sale-price {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent);
}

.rental-price {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.btn {
  padding: 0.6rem 1rem;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-align: center;
  font-size: 0.9rem;
}

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

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

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-main);
}

.btn-outline:hover {
  background: var(--bg-card-light);
}

.btn-accent {
  background-color: var(--accent);
  color: #000;
  font-weight: 700;
}

.btn-accent:hover {
  background-color: var(--accent-hover);
}

.btn-danger {
  background-color: var(--warning);
  color: #fff;
}

/* Calculator View */
.calc-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: var(--shadow);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 850px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-main);
  font-size: 0.95rem;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  color: #fff;
  font-size: 1rem;
}

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

.calc-results {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1.5rem;
}

.result-item {
  display: flex;
  justify-content: space-between;
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--border);
}

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

.comparison-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}

.option-card {
  border: 2px solid var(--border);
  border-radius: 0.75rem;
  padding: 1rem;
  text-align: center;
  background: var(--bg-card);
}

.option-card.highlight {
  border-color: var(--accent);
  background: rgba(245, 158, 11, 0.05);
}

.option-title {
  font-size: 0.9rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
}

.option-price {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  margin: 0.5rem 0;
}

/* Projects & Reviews Sections */
.projects-grid, .reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.project-card, .review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.project-tag {
  display: inline-block;
  background: rgba(37, 99, 235, 0.2);
  color: #60a5fa;
  padding: 0.2rem 0.6rem;
  border-radius: 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.review-stars {
  color: var(--accent);
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

/* Dashboard & Tables */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 1.25rem;
  border-radius: 0.75rem;
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
}

.metric-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  margin-top: 0.4rem;
}

.metric-subtext {
  font-size: 0.75rem;
  color: var(--success);
  margin-top: 0.2rem;
}

.table-responsive {
  overflow-x: auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  margin-bottom: 1.5rem;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.data-table th {
  background: var(--bg-dark);
  padding: 1rem;
  color: var(--text-muted);
  font-weight: 700;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-main);
}

.status-badge {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}

.status-active { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.status-pending { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.status-delivered { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.status-returned { background: rgba(148, 163, 184, 0.2); color: #cbd5e1; }

.tab-row {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.tab-btn {
  background: transparent;
  color: var(--text-muted);
  border: none;
  border-bottom: 3px solid transparent;
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  cursor: pointer;
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 2000;
  padding: 1rem;
}

.modal-overlay.active {
  display: flex;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  max-width: 650px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

.cart-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.cart-item-title {
  flex: 1;
  font-weight: 600;
}

.qty-control {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.qty-btn {
  width: 28px;
  height: 28px;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: #fff;
  border-radius: 0.3rem;
  cursor: pointer;
  font-weight: bold;
}

.footer {
  background-color: #020617;
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
  margin-top: auto;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-content {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

/* ==========================================================================
   MOBILE & TABLET RESPONSIVE STYLES
   ========================================================================== */

/* Prevent horizontal scroll globally */
html, body {
  overflow-x: hidden;
  max-width: 100%;
}

@media (max-width: 900px) {
  .header {
    padding: 0.45rem 0.85rem;
  }
  .nav-container {
    align-items: center;
  }
  .logo-img {
    height: 38px;
  }
  .header-phone-link {
    font-size: 0.82rem !important;
    padding: 0.28rem 0.55rem !important;
  }
  .mobile-menu-toggle {
    display: block;
    font-size: 0.95rem;
    padding: 0.3rem 0.65rem;
    font-weight: 700;
  }
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 1px solid #cbd5e1;
    padding: 0.85rem 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
    gap: 0.5rem;
    z-index: 1100;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-btn {
    width: 100%;
    justify-content: flex-start;
    padding: 0.6rem 0.85rem;
    font-size: 0.9rem;
  }
}

@media (max-width: 680px) {
  .header {
    padding: 0.35rem 0.65rem;
  }
  .logo-img {
    height: 32px;
  }
  .header-phone-link {
    font-size: 0.75rem !important;
    padding: 0.22rem 0.45rem !important;
    gap: 0.2rem !important;
  }
  .mobile-menu-toggle {
    font-size: 0.85rem;
    padding: 0.25rem 0.55rem;
  }

  .hero {
    min-height: 150px;
    max-height: 220px;
    aspect-ratio: auto;
    background-size: cover !important;
    background-position: center !important;
    padding: 0.75rem 0.5rem;
    align-items: center;
  }
  .banner-info-pills, .info-pill {
    display: none !important;
  }
    max-width: 100%;
  }

  .main-container {
    padding: 0 0.75rem;
    margin: 1rem auto;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  .section-title {
    font-size: 1.3rem;
  }

  .filter-bar {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.4rem;
    -webkit-overflow-scrolling: touch;
  }
  .filter-chip {
    white-space: nowrap;
    padding: 0.35rem 0.75rem;
    font-size: 0.78rem;
  }

  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
  }

  .product-card {
    max-width: 480px;
    margin: 0 auto;
    width: 100%;
  }

  .product-img-wrapper {
    height: 180px;
  }

  .card-actions {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .calc-card {
    padding: 1.1rem 0.85rem;
  }
  .calc-grid {
    grid-template-columns: 1fr;
    gap: 1.15rem;
  }
  .comparison-box {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .projects-grid, .reviews-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .dashboard-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
  }
  .metric-card {
    padding: 0.85rem;
  }
  .metric-value {
    font-size: 1.3rem;
  }

  .modal-overlay {
    padding: 0.4rem;
  }
  .modal-card {
    width: 100%;
    max-height: 94vh;
    border-radius: 0.75rem;
  }
  .modal-header {
    padding: 0.85rem 1rem;
  }
  .modal-body {
    padding: 1rem 0.85rem;
  }
  .modal-footer {
    padding: 0.85rem 1rem;
    flex-direction: column-reverse;
    gap: 0.5rem;
  }
  .modal-footer .btn {
    width: 100%;
  }

  .cart-item {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 420px) {
  .logo-img {
    height: 28px;
  }
  .header-phone-link {
    font-size: 0.72rem !important;
    padding: 0.2rem 0.4rem !important;
  }
  .mobile-menu-toggle {
    font-size: 0.8rem;
    padding: 0.2rem 0.45rem;
  }
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}