:root {
  --color-primary: #0891b2;
  --color-primary-dark: #0e7490;
  --color-text: #0f172a;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --color-surface: #f8fafc;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
  --max-width: 1120px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: #fff;
}

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

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

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

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-link:hover {
  text-decoration: none;
  opacity: 0.9;
}

.logo-link img {
  height: 44px;
  width: auto;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--color-border);
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--color-text);
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
}

.site-nav a {
  font-size: 0.9rem;
  font-weight: 600;
  color: #334155;
  text-decoration: none;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  text-decoration: none;
}

/* Hero */
.hero {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  object-fit: cover;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(15, 23, 42, 0.88) 0%, rgba(8, 145, 178, 0.55) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 4rem 0;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  max-width: 18ch;
}

.hero .tagline {
  margin: 0 0 1.5rem;
  font-size: 1.1rem;
  max-width: 42ch;
  opacity: 0.95;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.85);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  text-decoration: none;
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: #e2e8f0;
  text-decoration: none;
}

/* Sections */
section {
  padding: 3.5rem 0;
}

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

.section-title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
}

.section-lead {
  margin: 0 0 2rem;
  color: var(--color-muted);
  max-width: 60ch;
}

/* Grid layouts */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.two-col.reverse .col-image {
  order: -1;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  color: var(--color-primary-dark);
}

.card p {
  margin: 0;
  font-size: 0.95rem;
  color: #475569;
}

.card-icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.rounded-image {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

/* Page header (inner pages) */
.page-hero {
  background: linear-gradient(135deg, #0f172a 0%, #164e63 100%);
  color: #fff;
  padding: 3rem 0;
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
}

.page-hero p {
  margin: 0.5rem 0 0;
  opacity: 0.9;
  max-width: 50ch;
}

/* Feature list */
.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.feature-list li {
  padding-left: 1.75rem;
  position: relative;
  color: #334155;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.contact-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
}

.contact-card dl {
  margin: 0;
  display: grid;
  gap: 1rem;
}

.contact-card dt {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  margin-bottom: 0.25rem;
}

.contact-card dd {
  margin: 0;
  font-size: 1rem;
}

/* Footer */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 2.5rem 0;
  margin-top: 2rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: center;
}

.site-footer a {
  color: #e2e8f0;
}

.site-footer .brand {
  color: #fff;
  font-weight: 700;
}

/* Product badge */
.product-badge {
  display: inline-block;
  background: rgba(8, 145, 178, 0.15);
  color: var(--color-primary-dark);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.stack-tags span {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.65rem;
  background: #e0f2fe;
  color: #0c4a6e;
  border-radius: var(--radius-sm);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    padding: 1rem;
    box-shadow: var(--shadow);
  }

  .site-nav.open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0.5rem;
  }

  .two-col,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .two-col.reverse .col-image {
    order: 0;
  }
}