/* =========================================================================
   VoltMart — Electronics Store Landing Page (Abuja)
   Mobile-first, constrained palette, scroll animations, product zoom.
   ========================================================================= */

/* --------------------------------------------------------------------------
   Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Brand palette */
  --color-primary: #1e3a8a; /* deep blue */
  --color-primary-dark: #172f6e;
  --color-primary-light: #3b82f6;
  --color-accent: #f97316; /* orange */
  --color-accent-dark: #c2410c;

  /* Grayscale */
  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;

  /* Semantic */
  --color-bg: var(--color-white);
  --color-surface: var(--color-gray-50);
  --color-text: #1e293b; /* AA on white */
  --color-text-muted: #475569; /* AA on white */
  --color-border: var(--color-gray-200);
  --color-star: #f59e0b;

  /* Spacing scale — 4px base */
  --space-1: 0.25rem; /* 4px */
  --space-2: 0.5rem; /* 8px */
  --space-3: 1rem; /* 16px */
  --space-4: 1.5rem; /* 24px */
  --space-5: 2rem; /* 32px */
  --space-6: 3rem; /* 48px */
  --space-7: 4rem; /* 64px */

  /* Typography scale — intentional jumps */
  --fs-sm: 0.875rem; /* 14px */
  --fs-base: 1rem; /* 16px */
  --fs-md: 1.125rem; /* 18px */
  --fs-lg: 1.5rem; /* 24px */
  --fs-xl: 2rem; /* 32px */
  --fs-2xl: 3rem; /* 48px */

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;

  /* Radii + shadows */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 999px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 20px 48px rgba(15, 23, 42, 0.18);

  /* Layout */
  --container-max: 1200px;
  --header-height: 68px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.18s ease;
  --transition-base: 0.3s var(--ease-out);
}

/* --------------------------------------------------------------------------
   Reset / base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + var(--space-3));
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

h1,
h2,
h3 {
  margin: 0 0 var(--space-3);
  line-height: 1.2;
  color: var(--color-gray-900);
  font-weight: 700;
}

p {
  margin: 0 0 var(--space-3);
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -100px;
  z-index: 200;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-3);
}

.eyebrow {
  display: inline-block;
  margin: 0 0 var(--space-2);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
}

.text-accent {
  color: var(--color-accent);
}

.section-head {
  max-width: 640px;
  margin: 0 auto var(--space-6);
  text-align: center;
}

.section-head h2 {
  font-size: var(--fs-xl);
}

.section-lead {
  color: var(--color-text-muted);
  font-size: var(--fs-md);
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Focus states (accessibility)
   -------------------------------------------------------------------------- */
:focus-visible {
  outline: 3px solid var(--color-primary-light);
  outline-offset: 2px;
  border-radius: 4px;
}

/* --------------------------------------------------------------------------
   Buttons — morphing interactions (lift + color shift)
   -------------------------------------------------------------------------- */
.btn {
  --btn-bg: var(--color-primary);
  --btn-fg: var(--color-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: inherit;
  font-size: var(--fs-base);
  font-weight: 600;
  line-height: 1;
  color: var(--btn-fg);
  background: var(--btn-bg);
  border: 2px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: transform var(--transition-base),
    background-color var(--transition-base), box-shadow var(--transition-base),
    color var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-lg {
  padding: var(--space-3) var(--space-5);
  font-size: var(--fs-md);
}

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

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

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

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

.btn-ghost {
  --btn-bg: transparent;
  --btn-fg: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: none;
}

.btn-ghost:hover {
  --btn-bg: var(--color-primary);
  --btn-fg: var(--color-white);
}

/* Morphing button loading state (progressive enhancement hook) */
.btn.is-loading {
  pointer-events: none;
  color: transparent;
  position: relative;
}

.btn.is-loading::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-top-color: var(--color-white);
  border-radius: var(--radius-full);
  animation: btn-spin 0.7s linear infinite;
}

@keyframes btn-spin {
  to {
    transform: rotate(360deg);
  }
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.link-arrow:hover {
  gap: var(--space-2);
  color: var(--color-accent-dark);
}

/* --------------------------------------------------------------------------
   Header / navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--color-gray-900);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  font-size: var(--fs-md);
}

.brand-accent {
  color: var(--color-accent);
}

.primary-nav {
  display: flex;
  align-items: center;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-gray-800);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.nav-toggle-bar {
  position: relative;
}

.nav-toggle-bar::before {
  position: absolute;
  top: -7px;
}

.nav-toggle-bar::after {
  position: absolute;
  top: 7px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-menu {
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  position: absolute;
  left: 0;
  right: 0;
  top: var(--header-height);
  padding: var(--space-3);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.nav-menu.is-open {
  display: flex;
}

.nav-menu a {
  display: block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-weight: 600;
  color: var(--color-gray-700);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
  background: var(--color-gray-100);
  color: var(--color-primary);
}

.btn-header {
  display: none;
  padding: var(--space-2) var(--space-3);
  font-size: var(--fs-sm);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  padding: var(--space-6) 0 var(--space-7);
  background: radial-gradient(
      1200px 600px at 80% -10%,
      rgba(59, 130, 246, 0.18),
      transparent 60%
    ),
    linear-gradient(180deg, var(--color-gray-50), var(--color-white));
  overflow: hidden;
}

.hero-inner {
  display: grid;
  gap: var(--space-6);
}

.hero-copy h1 {
  font-size: var(--fs-2xl);
  letter-spacing: -0.02em;
}

.hero-lead {
  font-size: var(--fs-md);
  color: var(--color-text-muted);
  max-width: 52ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-4) 0 var(--space-5);
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
}

.hero-stats li {
  display: flex;
  flex-direction: column;
}

.hero-stats strong {
  font-size: var(--fs-lg);
  color: var(--color-primary);
}

.hero-stats span {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.hero-visual {
  position: relative;
}

.hero-image {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.hero-badge {
  position: absolute;
  left: var(--space-3);
  bottom: var(--space-3);
  display: flex;
  flex-direction: column;
  padding: var(--space-3) var(--space-4);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.hero-badge-title {
  font-weight: 700;
  color: var(--color-gray-900);
}

.hero-badge-sub {
  font-size: var(--fs-sm);
  color: var(--color-accent-dark);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Product showcase
   -------------------------------------------------------------------------- */
.products {
  padding: var(--space-7) 0;
}

.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.product-card {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.product-media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-gray-100);
  cursor: zoom-in;
}

.product-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out), opacity 0.4s ease;
}

/* Lazy-load fade-in — images with a deferred source start hidden */
.product-image[data-src] {
  opacity: 0;
}

.product-image.is-loaded {
  opacity: 1;
}

.zoom-hint {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-md);
  color: var(--color-white);
  background: rgba(15, 23, 42, 0.55);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.zoom-hint:hover {
  background: var(--color-primary);
  transform: scale(1.08);
}

.product-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
}

.product-body h3 {
  margin: 0;
  font-size: var(--fs-lg);
}

.product-body p {
  margin: 0;
  color: var(--color-text-muted);
}

.product-body .link-arrow {
  margin-top: auto;
  padding-top: var(--space-2);
}

/* --------------------------------------------------------------------------
   Trust signals
   -------------------------------------------------------------------------- */
.trust {
  padding: var(--space-7) 0;
  background: var(--color-primary);
  color: var(--color-white);
}

.trust .section-head h2 {
  color: var(--color-white);
}

.trust .eyebrow {
  color: #fdba74; /* accessible on deep blue */
}

.trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.trust-badge {
  padding: var(--space-5);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-md);
  text-align: center;
}

.trust-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: var(--space-3);
  font-size: var(--fs-lg);
  background: rgba(249, 115, 22, 0.2);
  border-radius: var(--radius-full);
}

.trust-badge h3 {
  color: var(--color-white);
  font-size: var(--fs-md);
}

.trust-badge p {
  margin: 0;
  color: var(--color-gray-200);
}

/* --------------------------------------------------------------------------
   Testimonials
   -------------------------------------------------------------------------- */
.testimonials {
  padding: var(--space-7) 0;
  background: var(--color-surface);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.testimonial-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.rating {
  font-size: var(--fs-md);
  letter-spacing: 2px;
  color: var(--color-star);
}

.rating .star-empty {
  color: var(--color-gray-300);
}

.testimonial-card blockquote {
  margin: 0;
}

.testimonial-card blockquote p {
  margin: 0;
  font-size: var(--fs-md);
  color: var(--color-gray-800);
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: auto;
}

.avatar {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.author-name {
  margin: 0;
  font-weight: 700;
  color: var(--color-gray-900);
}

.author-meta {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   CTA banner
   -------------------------------------------------------------------------- */
.cta {
  padding: var(--space-7) 0;
}

.cta-inner {
  text-align: center;
  max-width: 640px;
  padding: var(--space-6) var(--space-4);
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-primary-light)
  );
  color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.cta-inner h2 {
  color: var(--color-white);
  font-size: var(--fs-xl);
}

.cta-inner p {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--fs-md);
  margin-bottom: var(--space-4);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  padding: var(--space-6) 0 var(--space-4);
  background: var(--color-gray-900);
  color: var(--color-gray-300);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.brand-footer {
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.footer-tagline {
  color: var(--color-gray-400);
  max-width: 32ch;
}

.footer-heading {
  font-size: var(--fs-base);
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.footer-contact {
  font-style: normal;
}

.footer-contact p {
  margin: 0 0 var(--space-1);
}

.footer-links a,
.social-links a,
.footer-contact a {
  color: var(--color-gray-300);
  transition: color var(--transition-fast);
}

.footer-links li,
.social-links li {
  margin-bottom: var(--space-1);
}

.footer-links a:hover,
.social-links a:hover,
.footer-contact a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--fs-sm);
  color: var(--color-gray-400);
}

.footer-bottom p {
  margin: 0;
}

/* --------------------------------------------------------------------------
   Zoom modal
   -------------------------------------------------------------------------- */
.zoom-modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.zoom-modal[hidden] {
  display: none;
}

.zoom-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.8);
  animation: fade-in 0.2s ease-out;
}

.zoom-modal-dialog {
  position: relative;
  max-width: min(900px, 100%);
  max-height: 90vh;
  animation: zoom-in 0.25s var(--ease-out);
}

.zoom-modal-image {
  width: 100%;
  height: auto;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

.zoom-modal-close {
  position: absolute;
  top: calc(var(--space-4) * -1);
  right: 0;
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-xl);
  line-height: 1;
  color: var(--color-white);
  background: transparent;
  border: none;
  cursor: pointer;
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes zoom-in {
  from {
    opacity: 0;
    transform: scale(0.94);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* --------------------------------------------------------------------------
   Scroll-triggered reveal animations
   -------------------------------------------------------------------------- */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  will-change: opacity, transform;
}

[data-animate].visible {
  opacity: 1;
  transform: none;
}

/* If JS / IntersectionObserver is unavailable, show everything */
.no-js [data-animate],
.no-io [data-animate] {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   Breakpoints
   -------------------------------------------------------------------------- */

/* Small tablets and up */
@media (min-width: 640px) {
  .hero-copy h1 {
    font-size: 3.5rem;
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .trust-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Tablets and up */
@media (min-width: 768px) {
  .testimonial-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .hero {
    padding-top: var(--space-7);
  }
}

/* Desktop and up */
@media (min-width: 1024px) {
  .container {
    padding-inline: var(--space-5);
  }

  .nav-toggle {
    display: none;
  }

  .nav-menu {
    display: flex;
    flex-direction: row;
    position: static;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
    gap: var(--space-1);
  }

  .btn-header {
    display: inline-flex;
  }

  .product-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .hero-inner {
    grid-template-columns: 1.1fr 1fr;
    align-items: center;
    gap: var(--space-7);
  }

  /* Desktop product hover zoom */
  .product-media:hover .product-image,
  .product-media:focus-within .product-image {
    transform: scale(1.05);
  }
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-animate] {
    opacity: 1;
    transform: none;
  }

  .product-media:hover .product-image {
    transform: none;
  }
}