/* =========================
   CSS RESET / BASE
========================= */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body,
h1,
h2,
h3,
p,
ul {
  margin: 0;
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  color: #1f2937;
  background-color: #ffffff;
}

/* =========================
   VARIABLES
========================= */
:root {
  --container-width: 1200px;
  --container-padding: 1rem;

  --color-primary: #1d4ed8;
  --color-primary-dark: #1e3a8a;
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --color-bg-light: #f8fafc;
  --color-border: #e5e7eb;
  --color-white: #ffffff;

  --radius: 14px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);

  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
}

/* =========================
   UTILITIES
========================= */
.container {
  width: min(100% - 2rem, var(--container-width));
  margin-inline: auto;
}

.section {
  padding: 3rem 0;
}

.section-heading {
  text-align: center;
  margin-bottom: 2rem;
}

.section-heading h2 {
  font-size: 1.75rem;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  color: var(--color-primary-dark);
}

.section-heading p {
  max-width: 700px;
  margin-inline: auto;
  color: var(--color-muted);
}

.skip-link {
  position: absolute;
  top: -50px;
  left: 1rem;
  background: var(--color-primary-dark);
  color: var(--color-white);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  z-index: 1000;
}

.skip-link:focus {
  top: 1rem;
}

/* =========================
   HEADER
========================= */
.site-header {
  background: linear-gradient(180deg, #eff6ff 0%, #ffffff 100%);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0 2rem;
}

.header-grid {
  display: grid;
  gap: 1.5rem;
}

.branding {
  display: grid;
  gap: 1rem;
}

.logo-link {
  width: fit-content;
}

.logo {
  width: 90px;
  height: auto;
  object-fit: contain;
}

.eyebrow {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.brand-text h1 {
  font-size: 2rem;
  line-height: 1.15;
  margin-bottom: 0.75rem;
  color: var(--color-primary-dark);
}

.intro-text {
  color: var(--color-muted);
  max-width: 60ch;
}

.main-nav ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.main-nav a {
  display: block;
  text-align: center;
  padding: 0.85rem 0.85rem;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-weight: 600;
  transition: 0.3s ease;
}

.main-nav a:hover,
.main-nav a:focus {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* =========================
   ABOUT BANNER
========================= */

.about-banner {
  background-image: url("images/Banner.webp");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;

  min-height: 350px;
  display: grid;
  align-items: center;
  position: relative;
}

/* =========================
   PRODUCTS
========================= */
.products-grid {
  display: grid;
  gap: 1rem;
}

.product-card {
  background: transparent;
  border: 0;
  box-shadow: none;
  perspective: 1000px;
  min-height: 420px;
}

.product-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.product-content {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem;
  height: 100%;
}

.product-content h3 {
  font-size: 1.2rem;
  color: var(--color-primary-dark);
}

.product-content p {
  color: var(--color-muted);
}

.models {
  font-size: 0.95rem;
  color: var(--color-text);
}

.flip-card-inner {
  width: 100%;
  height: 100%;
  min-height: 420px;
  position: relative;
  border: 0;
  padding: 0;
  background: transparent;
  cursor: pointer;
  text-align: left;
  transform-style: preserve-3d;
  transition: transform 0.7s ease;
  will-change: transform;

}

.product-card.is-flipped .flip-card-inner {
  transform: rotateY(180deg) translateZ(0);
}

.flip-card-face {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: start;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  transform: translateZ(0);
}

.flip-card-front {
  z-index: 2;
  transform: rotateY(0deg) translateZ(1px);
}

.flip-card-back {
  transform: rotateY(180deg) translateZ(1px);
}

.flip-card-back .product-content {
  padding: 1.25rem;
}

.model-list {
  display: grid;
  gap: 0.4rem;
  margin-top: 0.5rem;
  color: var(--color-muted);
}

.model-list li {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.35rem;
}

.flip-hint {
  margin-top: auto;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* =========================
   FOOTER
========================= */
.site-footer {
  background-color: #111827;
  color: #f9fafb;
  padding-top: 3rem;
}

.footer-grid {
  display: grid;
  gap: 1.5rem;
}

.site-footer h2 {
  margin-bottom: 0.75rem;
}

.contact-info {
  display: grid;
  gap: 0.5rem;
}

.contact-info a {
  color: #93c5fd;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  margin-top: 2rem;
  padding: 1.25rem 0;
  text-align: center;
  font-size: 0.95rem;
  color: #d1d5db;
}

/* =========================
   TABLET BREAKPOINT
========================= */
@media (min-width: 768px) {
  .section {
    padding: 4rem 0;
  }

  .brand-text h1 {
    font-size: 2.5rem;
  }

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

  .about-banner {
    min-height: 450px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

/* =========================
   DESKTOP BREAKPOINT
========================= */
@media (min-width: 1024px) {
  .header-grid {
    grid-template-columns: 2fr 1fr;
    align-items: center;
  }

  .branding {
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 1.5rem;
  }

  .logo {
    width: 110px;
  }

  .main-nav ul {
    grid-template-columns: repeat(3, auto);
    justify-content: end;
  }

  .about-banner {
    min-height: 550px;
  }

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

  .product-content {
    padding: 1.25rem;
  }
}

/* =========================
   LEGAL PAGES
========================= */
.legal-page {
  background-color: var(--color-bg-light);
}

.legal-content {
  max-width: 900px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.legal-content h2 {
  color: var(--color-primary-dark);
  margin-bottom: 1.5rem;
  text-align: center;
  line-height: 1.2;
}

.legal-content h3 {
  color: var(--color-primary-dark);
  margin: 1.5rem 0 0.75rem;
}

.legal-content p {
  color: var(--color-text);
  margin-bottom: 1rem;
}

.legal-content hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: 2rem 0;
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.5rem;
  margin-top: 0.75rem;
}

.footer-legal-links a {
  color: #93c5fd;
  font-size: 0.95rem;
}

.footer-legal-links a:hover,
.footer-legal-links a:focus {
  text-decoration: underline;
}

@media (min-width: 768px) {
  .legal-content {
    padding: 2rem;
  }
}