/* ==========================================================================
   E-GADGET WORLD — DESIGN SYSTEM & BASE STYLES
   Mehnajpur Branch, Azamgarh
   Sophisticated Consumer Electronics Light Theme
   ========================================================================== */

:root {
  /* Brand Colors - Sophisticated Light Theme */
  --color-primary: #2563EB;        /* Electric Blue */
  --color-primary-dark: #1D4ED8;
  --color-primary-light: #EFF6FF;
  --color-primary-border: #BFDBFE;
  
  --color-secondary: #0F172A;      /* Deep Navy */
  --color-secondary-light: #1E293B;
  --color-secondary-muted: #334155;
  
  --color-bg-white: #FFFFFF;
  --color-bg-soft: #F8FAFC;
  --color-bg-section: #F1F5F9;
  --color-bg-card: #FFFFFF;
  --color-border: #E2E8F0;
  --color-border-hover: #CBD5E1;
  
  /* Status Colors */
  --color-success: #16A34A;        /* In Stock */
  --color-success-bg: #DCFCE7;
  --color-warning: #D97706;        /* Only 1 Left */
  --color-warning-bg: #FEF3C7;
  --color-danger: #DC2626;         /* Out of Stock */
  --color-danger-bg: #FEE2E2;

  /* Typography - Plus Jakarta Sans & System Stack */
  --font-family-base: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Typography Scales (Desktop Default: 44-52px hero, 30-36px section, 19-21px card title, 16-18px body, 16-17px nav/btn, 25-28px price, 13-14px badge) */
  --fs-hero: clamp(2.75rem, 4.2vw, 3.25rem);      /* 44px - 52px */
  --fs-section: clamp(1.875rem, 2.8vw, 2.25rem);  /* 30px - 36px */
  --fs-card-title: 1.25rem;                       /* 20px */
  --fs-body: 1.0625rem;                           /* 17px */
  --fs-nav: 1.03125rem;                           /* 16.5px */
  --fs-btn: 1.03125rem;                           /* 16.5px */
  --fs-price: 1.6875rem;                          /* 27px */
  --fs-badge: 0.84375rem;                         /* 13.5px */

  /* Text Colors */
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --text-inverse: #FFFFFF;

  /* Spacing & Sizing */
  --container-max-width: 1240px;
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Elevation Shadows */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.09), 0 8px 10px -6px rgba(15, 23, 42, 0.04);

  /* Transitions */
  --transition-fast: 0.16s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-Index Scale */
  --z-base: 1;
  --z-sticky: 100;
  --z-dropdown: 200;
  --z-modal: 500;
  --z-toast: 1000;
}

/* Base Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-base);
  color: var(--text-primary);
  background-color: var(--color-bg-white);
  line-height: 1.6;
  font-size: var(--fs-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

main {
  flex: 1 0 auto;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

svg {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

button, input, select, textarea {
  font: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  touch-action: manipulation;
}

ul, ol {
  list-style: none;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Section Common */
.section {
  padding-top: 72px;
  padding-bottom: 72px;
}

.section-soft {
  background-color: var(--color-bg-soft);
}

.section-white {
  background-color: var(--color-bg-white);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px auto;
}

.section-eyebrow {
  display: inline-block;
  font-size: var(--fs-badge);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  border: 1px solid var(--color-primary-border);
}

.section-title {
  font-size: var(--fs-section);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 14px;
  letter-spacing: -0.025em;
}

.section-subtitle {
  font-size: var(--fs-body);
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   TOP INFORMATION BAR (Desktop & Tablet)
   ========================================================================== */
.top-bar {
  background-color: var(--color-secondary);
  color: #CBD5E1;
  font-size: var(--fs-badge);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.top-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 8px;
  padding-bottom: 8px;
  flex-wrap: wrap;
  gap: 14px;
}

.top-bar-left, .top-bar-right {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.top-bar-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #CBD5E1;
}

.top-bar-item svg {
  width: 15px;
  height: 15px;
  stroke: #38BDF8;
  flex-shrink: 0;
}

.top-bar-item a {
  color: #E2E8F0;
  font-weight: 600;
}

.top-bar-item a:hover {
  color: #FFFFFF;
}

.top-badge-verified {
  background-color: rgba(37, 99, 235, 0.25);
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: #38BDF8;
  padding: 3px 10px;
  border-radius: var(--radius-xs);
  font-size: var(--fs-badge);
  font-weight: 700;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: var(--z-sticky);
  transition: box-shadow var(--transition-fast), height var(--transition-fast);
}

.site-header.scrolled {
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
  gap: 20px;
}

.brand-logo-wrap {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

/* Nav Menu Desktop */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 10px 14px;
  font-size: var(--fs-nav);
  font-weight: 600;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

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

.nav-link svg {
  width: 15px;
  height: 15px;
  transition: transform var(--transition-fast);
}

/* Services Dropdown */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 270px;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

.nav-item:hover .dropdown-menu,
.nav-item:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-item:hover .nav-link svg {
  transform: rotate(180deg);
}

.dropdown-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.dropdown-link:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.dropdown-link svg {
  width: 16px;
  height: 16px;
  stroke: var(--color-primary);
  flex-shrink: 0;
}

/* Header CTAs */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-header-call {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: var(--fs-nav);
  font-weight: 600;
  color: var(--text-primary);
  padding: 10px 16px;
  min-height: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-header-call:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.btn-header-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: var(--fs-nav);
  font-weight: 700;
  color: #FFFFFF;
  background-color: #25D366;
  padding: 10px 18px;
  min-height: 44px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  box-shadow: 0 1px 3px rgba(37, 211, 102, 0.3);
}

.btn-header-whatsapp:hover {
  background-color: #1EBE5D;
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
}

.btn-header-whatsapp svg, .btn-header-call svg {
  width: 16px;
  height: 16px;
}

/* Hamburger Button */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  z-index: calc(var(--z-sticky) + 1);
}

.hamburger-line {
  width: 100%;
  height: 2px;
  background-color: var(--color-secondary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.hamburger-btn.is-active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger-btn.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Navigation Drawer (Strictly Hidden by Default on Desktop) */
.mobile-nav-drawer {
  display: none !important;
}

/* Mobile Nav Backdrop Overlay */
.mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(2px);
  z-index: calc(var(--z-sticky) - 1);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.mobile-nav-backdrop.is-active {
  opacity: 1;
  visibility: visible;
}

/* Filter Backdrop for Mobile Drawer */
.filter-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(2px);
  z-index: calc(var(--z-modal) - 1);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.filter-backdrop.is-active {
  opacity: 1;
  visibility: visible;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  min-height: 46px;
  font-size: var(--fs-btn);
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
  line-height: 1.3;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn-lg svg {
  width: 20px;
  height: 20px;
}

.btn-sm svg {
  width: 15px;
  height: 15px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  box-shadow: 0 1px 3px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: #FFFFFF;
}

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

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--color-border);
}

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

.btn-whatsapp {
  background-color: #25D366;
  color: #FFFFFF;
  font-weight: 700;
  box-shadow: 0 1px 3px rgba(37, 211, 102, 0.3);
}

.btn-whatsapp:hover {
  background-color: #1EBE5D;
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(37, 211, 102, 0.4);
  transform: translateY(-1px);
}

.btn-disabled,
.btn:disabled {
  background-color: #E2E8F0 !important;
  color: #94A3B8 !important;
  border-color: #E2E8F0 !important;
  cursor: not-allowed !important;
  box-shadow: none !important;
  transform: none !important;
  pointer-events: none;
}

.btn-sm {
  padding: 8px 16px;
  min-height: 38px;
  font-size: var(--fs-badge);
}

.btn-lg {
  padding: 14px 28px;
  min-height: 52px;
  font-size: var(--fs-btn);
}

.btn-full {
  width: 100%;
}

/* ==========================================================================
   BADGES & CHIPS
   ========================================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  font-size: var(--fs-badge);
  font-weight: 700;
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
  line-height: 1.25;
}

.badge-brand {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border: 1px solid var(--color-primary-border);
}

.badge-stock-in {
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid #BBF7D0;
}

.badge-stock-low {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid #FDE68A;
}

.badge-stock-out {
  background-color: var(--color-danger-bg);
  color: var(--color-danger);
  border: 1px solid #FECACA;
}

/* Floating WhatsApp Quick Action Button */
.floating-whatsapp {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: #25D366;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-full);
  font-size: var(--fs-btn);
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.45);
  z-index: var(--z-sticky);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.floating-whatsapp:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
  color: #FFFFFF;
}

.floating-whatsapp svg {
  width: 22px;
  height: 22px;
  fill: #FFFFFF;
  flex-shrink: 0;
}

/* Mobile Bottom Sticky Bar */
.mobile-bottom-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: #FFFFFF;
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 16px rgba(15, 23, 42, 0.08);
  padding: 10px 16px;
  padding-bottom: max(10px, env(safe-area-inset-bottom));
  z-index: var(--z-sticky);
}

.mobile-bottom-bar-inner {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 10px;
  max-width: 500px;
  margin: 0 auto;
}

.mobile-bar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 11px 16px;
  min-height: 46px;
  font-size: var(--fs-btn);
  font-weight: 700;
  border-radius: var(--radius-sm);
  text-align: center;
}

.mobile-bar-call {
  background-color: var(--color-bg-soft);
  color: var(--color-secondary);
  border: 1px solid var(--color-border);
}

.mobile-bar-whatsapp {
  background-color: #25D366;
  color: #FFFFFF;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background-color: var(--color-secondary);
  color: #94A3B8;
  padding-top: 64px;
  padding-bottom: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr 1fr 1.1fr;
  gap: 40px;
  margin-bottom: 52px;
}

.footer-col-title {
  color: #FFFFFF;
  font-size: 1.1875rem;
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.footer-about-text {
  font-size: var(--fs-body);
  line-height: 1.65;
  color: #94A3B8;
  margin-bottom: 20px;
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: var(--fs-body);
  color: #94A3B8;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: #FFFFFF;
  padding-left: 3px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: var(--fs-body);
  color: #94A3B8;
  margin-bottom: 12px;
  line-height: 1.5;
}

.footer-contact-item svg {
  width: 18px;
  height: 18px;
  stroke: #38BDF8;
  flex-shrink: 0;
  margin-top: 3px;
}

.footer-contact-item a {
  color: #CBD5E1;
}

.footer-contact-item a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: var(--fs-badge);
  color: #64748B;
}

.footer-legal-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.footer-legal-link {
  color: #64748B;
}

.footer-legal-link:hover {
  color: #94A3B8;
}