:root {
  /* Base surfaces */
  --color-bg: #f8fafc;           /* page background – very light cool gray */
  --color-surface: #ffffff;      /* cards, main panels */
  --color-surface-alt: #e5edf7;  /* subtle tinted sections */

  /* Brand */
  --color-primary: #6366f1;      /* indigo 500 */
  --color-primary-dark: #4f46e5; /* indigo 600 for hover/active */
  --color-primary-soft: #eef2ff; /* light indigo background */

  --color-accent: #f97316;       /* warm orange accent */
  --color-accent-soft: #ffedd5;  /* pale orange/cream */

  /* Text */
  --color-text: #0f172a;         /* near-black navy */
  --color-text-muted: #64748b;   /* slate gray for secondary text */

  /* Borders & outlines */
  --color-border-subtle: #e2e8f0;

  /* Utility */
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.12);
}

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

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

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

a:hover,
a:focus-visible {
  text-decoration: underline;
}

h1 {
  font-size: clamp(2.625rem, 5vw, 3rem); /* ~42-48px */
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

h2 {
  font-size: clamp(2rem, 4vw, 2.25rem); /* ~32-36px */
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 1.75rem); /* ~24-28px */
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
}

.container {
  max-width: 1100px;
  padding-inline: var(--space-2xl);
  margin-inline: auto;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 250, 252, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
  padding-block: var(--space-md);
}

.logo img {
  height: 40px;
}

.site-nav {
  display: flex;
  margin-left: auto;
}

nav ul {
  display: flex;
  gap: 20px; /* Adjust spacing as needed */
  list-style: none;
  margin: 0;
  padding: 0;
}

nav ul li {
  display: flex; /* or block */
}

.nav-link {
  /* Styles for the li, if any, will go here. */
}

.nav-link > a {
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.5rem 1rem;
  border-radius: 999px;
}

.nav-link--active > a,
.nav-link:hover > a,
.nav-link:focus-visible > a {
  color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

.header-cta {
  margin-left: var(--space-md);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.25);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--color-primary);
  border-color: rgba(99, 102, 241, 0.35);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background-color: var(--color-primary-soft);
}

/* Hero */

.hero {
  background:
    radial-gradient(circle at top left, rgba(99, 102, 241, 0.18), transparent 55%),
    radial-gradient(circle at bottom right, rgba(6, 182, 212, 0.15), transparent 55%),
    var(--color-surface);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: var(--space-xl);
  align-items: center;
}

.hero-copy h1 {
  line-height: 1.2;
}

.hero-subtitle {
  margin-bottom: var(--space-lg);
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Sections */

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

.section--tinted {
  background-color: var(--color-surface-alt);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

.section-header p {
  color: var(--color-text-muted);
}

.section {
  padding-block: var(--space-2xl);
}

/* Feature / product grid */

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-xl);
}

.card,
.product-card,
.order-panel,
.contact-panel {
  background-color: var(--color-surface);
  border-radius: 1.25rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  border: 1px solid rgba(148, 163, 184, 0.15);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover,
.product-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.product-card .product-icon {
  width: 96px;
  height: 96px;
  border-radius: 0.5rem;
  object-fit: cover;
  display: block;
  margin-bottom: 1rem;
}

.product-card h3 {
  margin-bottom: var(--space-md);
}

.product-card ul {
  list-style: none;
  padding: 0;
  margin-top: var(--space-md);
}

.product-card li {
  margin-bottom: var(--space-xs);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  display: flex;
  align-items: center;
}

.product-card li::before {
  content: '✓';
  color: var(--color-primary);
  margin-right: var(--space-xs);
  font-weight: 600;
}

/* CTA band */

.section-cta {
  background: var(--color-surface-alt);
}

.section-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

/* Forms */
input,
select,
textarea {
  background-color: #ffffff;
  border: 1px solid var(--color-border-subtle);
  color: var(--color-text);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  width: 100%;
  font-family: inherit;
  font-size: var(--fs-md);
  transition: border-color 0.15s ease, outline 0.15s ease;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-color: var(--color-primary);
}

.form-label {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  margin-bottom: var(--space-xs);
  display: block;
}

.form-group {
  margin-bottom: var(--space-md);
}

/* Footer */

.site-footer {
  background-color: #0b1120;   /* deep navy footer */
  color: #e5e7eb;
  border-top: none;
}

.site-footer a {
  color: #e5e7eb;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(148, 163, 184, 0.4);
  color: #9ca3af;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.5fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.footer-grid h3,
.footer-grid h4 {
  margin-top: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(15, 23, 42, 0.08);
  padding-top: var(--space-sm);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

 @media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .product-grid {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .section {
    padding-block: var(--space-xl);
  }
}

 @media (max-width: 640px) {
  .product-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}