:root {
  --color-bg: #f5f7fb;
  --color-surface: #ffffff;
  --color-surface-soft: #f9fafc;
  --color-border: #e1e4ee;
  --color-border-strong: #c9d0e3;
  --color-primary: #2563eb;
  --color-primary-soft: rgba(37, 99, 235, 0.08);
  --color-primary-strong: #1d4ed8;
  --color-accent: #f97316;
  --color-text: #0f172a;
  --color-text-muted: #6b7280;

  --radius-lg: 1.2rem;
  --radius-md: 0.9rem;
  --radius-pill: 999px;

  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.07);
  --shadow-card: 0 8px 24px rgba(15, 23, 42, 0.06);

  --transition-fast: 150ms ease-out;
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont,
    "SF Pro Text", "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #e5edff 0, #f5f7fb 45%, #f5f7fb 100%);
  color: var(--color-text);
  line-height: 1.6;
}

/* Layout */

.container {
  width: min(1120px, 100% - 2.5rem);
  margin-inline: auto;
}

/* Site chrome */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: linear-gradient(
    to bottom,
    rgba(245, 247, 251, 0.95),
    rgba(245, 247, 251, 0.85),
    transparent
  );
  border-bottom: 1px solid rgba(209, 213, 219, 0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.9rem;
}

.site-brand a {
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--color-text);
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  text-decoration: none;
  color: var(--color-text-muted);
  border: 1px solid transparent;
  transition:
    color var(--transition-fast),
    background var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast);
}

.site-nav li.active a,
.site-nav a:hover {
  color: var(--color-primary-strong);
  background: var(--color-primary-soft);
  border-color: rgba(37, 99, 235, 0.25);
  transform: translateY(-1px);
}

.site-main {
  padding-bottom: 3rem;
}

.site-footer {
  border-top: 1px solid rgba(209, 213, 219, 0.7);
  padding-block: 1.4rem;
  background: #f9fafb;
}

.site-footer p {
  margin: 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* Hero (TD-style) */

.hero.hero--td {
  padding-block: 4rem 3rem;
}

.hero-inner {
  text-align: center;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.2rem 0.85rem;
  border-radius: var(--radius-pill);
  background: rgba(37, 99, 235, 0.06);
  color: var(--color-primary-strong);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.8rem;
}

.hero-inner h1 {
  font-size: clamp(2rem, 3vw, 2.6rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.7rem;
}

.hero-subtitle {
  max-width: 38rem;
  margin: 0 auto;
  color: var(--color-text-muted);
  font-size: 0.98rem;
}

/* Hero metrics */

.hero-metrics {
  margin-top: 1.8rem;
  display: inline-grid;
  grid-auto-flow: column;
  gap: 1.6rem;
  padding: 0.8rem 1.4rem;
  border-radius: var(--radius-pill);
  background: #ffffff;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(209, 213, 219, 0.9);
}

.metric {
  text-align: left;
  min-width: 90px;
}

.metric-value {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-primary-strong);
}

.metric-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

/* Sections, grid & cards */

.section {
  padding-block: 2.4rem;
}

.section-title {
  font-size: 1.3rem;
  margin-bottom: 1.4rem;
}

.grid {
  display: grid;
  gap: 1.4rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.5rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.card::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: radial-gradient(circle at top, rgba(37, 99, 235, 0.08), transparent 60%);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.card:hover {
  border-color: var(--color-border-strong);
  box-shadow: 0 16px 45px rgba(15, 23, 42, 0.12);
  transform: translateY(-2px);
}

.card:hover::before {
  opacity: 1;
}

/* Product cards & thumbnails */

.product-card-header {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-bottom: 0.8rem;
}

.product-thumb {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  object-fit: cover;
  border: 1px solid rgba(209, 213, 219, 0.9);
  box-shadow: 0 6px 12px rgba(15, 23, 42, 0.18);
}

.product-card h3 {
  margin: 0;
  font-size: 1.05rem;
}

.tagline {
  margin: 0.25rem 0 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.card-cta {
  margin-top: 1rem;
}

/* Product hero (detail pages) */

.product-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.3fr);
  gap: 1.8rem;
  padding-block: 3rem 2rem;
  align-items: center;
}

.product-hero-media {
  display: flex;
  justify-content: center;
}

.product-hero-image {
  max-width: 100%;
  border-radius: 1.4rem;
  border: 1px solid rgba(209, 213, 219, 0.9);
  box-shadow: 0 22px 60px rgba(15, 23, 42, 0.24);
}

.product-hero-copy h1 {
  margin: 0 0 0.6rem;
  font-size: 1.8rem;
}

.product-hero-tagline {
  margin: 0 0 0.8rem;
  color: var(--color-text-muted);
  font-size: 0.98rem;
}

/* Generic page content */

.page-content {
  padding-block: 3rem 4rem;
}

.page-content .container {
  max-width: 780px;
}

.page-content h1 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.page-content h2 {
  font-size: 1.2rem;
  margin-top: 1.8rem;
  margin-bottom: 0.6rem;
}

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

.page-content code,
.page-content pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  font-size: 0.86rem;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast),
    border-color var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-strong));
  color: #ffffff;
  box-shadow: 0 16px 35px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 20px 45px rgba(37, 99, 235, 0.45);
}

.btn-secondary {
  background: #ffffff;
  color: var(--color-primary-strong);
  border-color: rgba(37, 99, 235, 0.35);
}

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

/* Responsive tweaks */

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }

  .hero.hero--td {
    padding-block: 3.3rem 2.4rem;
  }

  .hero-metrics {
    grid-auto-flow: row;
    text-align: center;
    border-radius: 1rem;
  }

  .metric {
    text-align: center;
  }

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