:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-glow: rgba(37, 99, 235, 0.22);
  --primary-light: #eff6ff;
  --primary-border: #bfdbfe;

  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f8fafc;
  --border: #e2e8f0;
  --border-focus: #2563eb;
  --border-hover: #cbd5e1;

  --text: #0f172a;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  --text-heading: #0f172a;

  --success: #059669;
  --success-light: #ecfdf5;
  --success-border: #a7f3d0;

  --amber: #d97706;
  --amber-light: #fffbeb;
  --amber-border: #fde68a;

  --danger: #dc2626;
  --danger-light: #fef2f2;
  --danger-border: #fca5a5;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.06), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 30px -4px rgba(0, 0, 0, 0.08), 0 4px 12px -2px rgba(0, 0, 0, 0.03);
  --shadow-glow: 0 8px 24px -4px rgba(37, 99, 235, 0.28);
}

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

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

/* --- TOP ANNOUNCEMENT BANNER --- */
.top-announcement {
  background: linear-gradient(90deg, #1e3a8a 0%, #2563eb 50%, #0284c7 100%);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.45rem 1rem;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  letter-spacing: 0.02em;
}

/* --- HEADER & NAVIGATION --- */
header {
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand-group {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
}
.brand-logo-badge {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #ffffff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.25rem;
  box-shadow: var(--shadow-sm);
}
.brand-text {
  display: flex;
  flex-direction: column;
}
.brand-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.brand-subtitle {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.badge-live-store {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--success-light);
  border: 1px solid var(--success-border);
  color: var(--success);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
}
.badge-live-store .dot {
  width: 7px;
  height: 7px;
  background: #10b981;
  border-radius: 50%;
  animation: pulseDot 1.8s infinite;
}
@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.btn-admin-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: #f1f5f9;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-admin-link:hover {
  background: #e2e8f0;
  border-color: var(--border-hover);
}

/* --- MAIN PDP CONTAINER --- */
.product-showcase-container {
  max-width: 1280px;
  margin: 1.5rem auto 2.5rem;
  padding: 0 1.5rem;
  width: 100%;
}

.pdp-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

/* --- LEFT: PRODUCT VISUAL GALLERY --- */
.gallery-column {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 85px;
}
.gallery-main-viewport {
  width: 100%;
  height: 480px;
  background: #090d16;
  border: 1px solid #1e293b;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: zoom-in;
  box-shadow: inset 0 2px 8px rgba(0,0,0,0.4);
}
.gallery-main-img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
}
.gallery-main-img:hover {
  transform: scale(1.02);
}
.gallery-badge-overlay {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  border-radius: 9999px;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  pointer-events: none;
}
.gallery-zoom-hint {
  position: absolute;
  bottom: 14px;
  right: 14px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #94a3b8;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  pointer-events: none;
}

/* Thumbnail Carousel Grid */
.thumbnails-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
  margin-top: 1rem;
}
.thumb-card {
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  background: #090d16;
  height: 75px;
  padding: 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
  position: relative;
}
.thumb-card img {
  max-width: 100%;
  max-height: 100%;
  object-fit: cover;
  border-radius: 6px;
  opacity: 0.82;
  transition: opacity 0.15s;
}
.thumb-card:hover {
  border-color: var(--primary-border);
  transform: translateY(-2px);
}
.thumb-card:hover img {
  opacity: 1;
}
.thumb-card.active {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-glow);
}
.thumb-card.active img {
  opacity: 1;
}

/* --- RIGHT: PRODUCT BUY BOX --- */
.details-column {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.product-h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 2.15rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-heading);
  letter-spacing: -0.025em;
}

/* Core Features Checklist */
.feature-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin: 0.35rem 0;
}
.feature-checklist li {
  font-size: 0.86rem;
  color: var(--text);
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  line-height: 1.45;
}
.feature-checklist li .chk {
  color: var(--success);
  font-weight: 900;
  font-size: 0.95rem;
  margin-top: 1px;
  flex-shrink: 0;
}

/* --- THE DEMO CHECKOUT BUY BOX CARD --- */
.buy-box-card {
  background: #ffffff;
  border: 2px solid #bfdbfe;
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-md);
  position: relative;
}
.buy-box-card::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 10%;
  right: 10%;
  height: 3px;
  background: linear-gradient(90deg, #2563eb, #38bdf8, #2563eb);
  border-radius: 3px;
}

.pricing-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.price-main {
  font-family: 'Outfit', sans-serif;
  font-size: 2.6rem;
  font-weight: 900;
  color: #0f172a;
  letter-spacing: -0.03em;
  line-height: 1;
}
.price-badge-demo {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #2563eb;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
  letter-spacing: 0.04em;
}

.pricing-note {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

/* AMOUNT SELECTOR CHIPS */
.amount-selector-title {
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.amount-selector-chips {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.chip-btn {
  padding: 0.55rem 0.4rem;
  font-size: 0.85rem;
  font-weight: 800;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
  cursor: pointer;
  text-align: center;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
}
.chip-btn:hover {
  border-color: var(--primary-border);
  background: var(--primary-light);
  color: var(--primary);
}
.chip-btn.active {
  border-color: var(--primary);
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--primary-glow);
}

/* CUSTOM AMOUNT INPUT ROW */
.custom-amount-box {
  margin-bottom: 1.25rem;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.custom-amount-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.custom-input-wrap {
  display: flex;
  align-items: center;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.65rem;
  width: 150px;
  transition: border-color 0.15s;
}
.custom-input-wrap:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
.custom-currency-symbol {
  font-weight: 800;
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-right: 4px;
}
.custom-amount-input {
  border: none;
  outline: none;
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-heading);
  width: 100%;
}

/* PRIMARY BUY BUTTON */
.btn-buy-primary {
  width: 100%;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  padding: 1.05rem 1.5rem;
  font-size: 1.08rem;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  box-shadow: var(--shadow-glow);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  letter-spacing: -0.01em;
}
.btn-buy-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px -4px rgba(37, 99, 235, 0.38);
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
}
.btn-buy-primary:active {
  transform: translateY(0);
}
.btn-buy-primary:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.security-guarantee-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

/* VALUE PROPOSITION BADGES GRID */
.value-props-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}
.prop-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
}
.prop-pill .icon {
  font-size: 0.95rem;
}

/* --- ARCHITECTURE REQUIREMENTS & TRADEOFFS SECTION --- */
.requirements-section {
  max-width: 1280px;
  margin: 2.5rem auto 1.5rem;
  padding: 0 1.5rem;
  width: 100%;
}
.req-banner {
  background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
  border: 2px solid #fcd34d;
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}
.req-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-top: 1.25rem;
}
.req-card {
  background: #ffffff;
  border: 1px solid #fde68a;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.req-card.danger-card {
  border-color: #fca5a5;
}
.req-card.conditional-card {
  border-color: #fed7aa;
}
.req-pill-badge {
  font-size: 0.7rem;
  font-weight: 800;
  padding: 0.2rem 0.55rem;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* --- CAPABILITIES SECTION --- */
.specs-section {
  max-width: 1280px;
  margin: 2rem auto;
  padding: 0 1.5rem;
  width: 100%;
}
.section-heading-row {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 2.5rem;
}
.section-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-light);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}
.section-title {
  font-family: 'Outfit', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-heading);
  letter-spacing: -0.025em;
}

.features-quad-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}
.quad-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.quad-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}
.quad-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 1rem;
}
.quad-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 0.4rem;
}
.quad-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* RESPONSIVE TABLE WRAPPER & COMPARISON CARD */
.table-responsive-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.comparison-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 3rem;
  overflow: hidden;
}
.comparison-table {
  width: 100%;
  min-width: 580px;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.comparison-table th {
  text-align: left;
  padding: 0.85rem 1rem;
  background: var(--bg-card-subtle);
  color: var(--text-heading);
  font-weight: 700;
  border-bottom: 2px solid var(--border);
}
.comparison-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-body);
}
.comparison-table tr:last-child td {
  border-bottom: none;
}
.comparison-table tr:hover td {
  background: rgba(37, 99, 235, 0.02);
}
.comparison-table .col-highlight {
  background: rgba(37, 99, 235, 0.05);
  color: #1d4ed8;
  font-weight: 600;
}
.comparison-table th.col-highlight {
  background: rgba(37, 99, 235, 0.08);
  color: #1d4ed8;
  border-bottom-color: #3b82f6;
}

/* FOOTER */
footer {
  background: #020617;
  border-top: 1px solid #1e293b;
  padding: 2.5rem 1.5rem;
  margin-top: auto;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* LIGHTBOX MODAL */
.lightbox-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 999999;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  cursor: zoom-out;
}
.lightbox-modal.active {
  display: flex;
}
.lightbox-close-btn {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
.lightbox-close-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}
.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  cursor: default;
  object-fit: contain;
}

/* CELEBRATION MODAL */
.celebration-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.8);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 999998;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.celebration-modal.active {
  display: flex;
}
.celebration-card {
  background: #ffffff;
  border-radius: var(--radius-xl);
  padding: 2rem;
  max-width: 440px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  animation: popIn 0.25s ease-out;
}
@keyframes popIn {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.celebration-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #dcfce7;
  color: #16a34a;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 800;
  margin: 0 auto 1rem;
}
.receipt-box {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin: 1.25rem 0;
  text-align: left;
  font-size: 0.85rem;
}
.receipt-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.35rem 0;
  border-bottom: 1px dashed var(--border);
}
.receipt-row:last-child {
  border-bottom: none;
}

/* ========================================================
   RESPONSIVE BREAKPOINTS (Mobile, Tablet, Desktop)
   ======================================================== */

@media (max-width: 1024px) {
  .pdp-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .gallery-column {
    position: static;
  }
  .gallery-main-viewport {
    height: 380px;
  }
}

@media (max-width: 768px) {
  .top-announcement {
    font-size: 0.72rem;
    padding: 0.4rem 0.5rem;
    gap: 0.35rem;
  }
  header {
    padding: 0.5rem 0.75rem;
  }
  .header-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 0.65rem;
    padding: 0.5rem 0.25rem;
  }
  .brand-group {
    justify-content: flex-start;
  }
  .header-nav {
    width: 100%;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
    gap: 0.45rem;
    scrollbar-width: none;
  }
  .header-nav::-webkit-scrollbar {
    display: none;
  }
  .btn-admin-link {
    flex-shrink: 0;
    padding: 0.35rem 0.65rem;
    font-size: 0.72rem;
  }
  .product-showcase-container {
    padding: 1rem 0.75rem;
  }
  .gallery-column {
    padding: 1rem;
  }
  .gallery-main-viewport {
    height: 280px;
  }
  .product-h1 {
    font-size: 1.45rem;
  }
  .buy-box-card {
    padding: 1.25rem 1rem;
  }
  .price-main {
    font-size: 1.85rem;
  }
  .amount-selector-chips {
    gap: 0.4rem;
  }
  .chip-btn {
    padding: 0.45rem 0.4rem;
    font-size: 0.8rem;
  }
  .thumbnails-grid {
    gap: 0.35rem;
    margin-top: 0.75rem;
  }
  .thumb-card {
    height: 54px;
    border-radius: var(--radius-sm);
    padding: 2px;
  }
  .requirements-section {
    padding: 0 0.85rem;
    margin: 1.5rem auto 1rem;
  }
  .req-banner {
    padding: 1.15rem 1rem;
    border-radius: var(--radius-lg);
  }
  .req-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 1rem;
  }
  .req-card {
    padding: 1.1rem;
  }
  .specs-section {
    padding: 0 0.85rem;
    margin: 1.5rem auto;
  }
  .section-title {
    font-size: 1.45rem;
  }
  .features-quad-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
  }
  .comparison-card {
    padding: 1.25rem 1rem;
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
  }
  .comparison-table th, .comparison-table td {
    padding: 0.65rem 0.5rem;
    font-size: 0.8rem;
  }
  footer {
    padding: 1.75rem 1rem;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .product-h1 {
    font-size: 1.3rem;
  }
  .price-main {
    font-size: 1.6rem;
  }
  .amount-selector-chips {
    grid-template-columns: repeat(3, 1fr);
  }
  .custom-amount-box {
    flex-direction: column;
    align-items: stretch;
  }
  .custom-input-wrap {
    width: 100%;
  }
  .value-props-grid {
    grid-template-columns: 1fr;
  }
  .gallery-main-viewport {
    height: 220px;
  }
  .lightbox-modal {
    padding: 0.75rem;
  }
}