/* ====== Design tokens ====== */
:root {
  --bg: #ffffff;
  --fg: #111827;
  --muted: #6b7280;
  --brand: #0f172a; /* primary dark */
  --brand-accent: #2563eb; /* accent blue */
  --card: #f9fafb;
  --acc: #f3f4f6;
  --border: #e5e7eb;
  --header-h: 64px; /* used for anchor offset */
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 "Inter", system-ui, -apple-system, Segoe UI, Roboto, Arial;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.45);
  outline-offset: 2px;
}
a {
  color: var(--brand-accent);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}
a:hover {
  color: var(--brand);
}

/* ====== Header & Nav ====== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(150%) blur(8px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.2s ease, background 0.2s ease;
  min-height: var(--header-h);
}
.site-header--scrolled {
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 14px;
  flex-wrap: wrap;
}

/* Brand / logo */
.logo {
  height: 28px; /* smaller, consistent */
  width: auto;
  display: block;
  border-radius: 8px;
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.nav a {
  color: var(--brand);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 10px 12px; /* larger tap target */
  border-radius: 10px;
  position: relative;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 6px;
  height: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
  opacity: 0.8;
}
.nav a:hover::after {
  transform: scaleX(1);
}

.nav a.is-active::after {
  transform: scaleX(1);
}

/* ====== Hero ====== */
.hero {
  padding: 96px 0 72px;
  background: linear-gradient(180deg, var(--bg), var(--acc));
  text-align: center;
}
.hero h2 {
  font-size: 2.4rem;
  margin: 0.4rem 0 1rem;
  font-weight: 800;
  color: var(--brand);
  letter-spacing: 0.2px;
}
.hero p {
  max-width: 680px;
  margin: 0 auto 1.6rem;
  color: var(--muted);
  font-size: 1.05rem;
}

/* Buttons */
.btn {
  display: inline-block;
  background: var(--brand-accent);
  color: #fff;
  font-weight: 700;
  padding: 12px 18px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
  transition: transform 0.15s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.32);
}

/* Sections */
.section {
  padding-top: 72px;
  padding-bottom: 72px;
  scroll-margin-top: calc(var(--header-h) + 12px);
}
.section h3 {
  font-size: 1.75rem;
  margin: 0 0 0.8rem;
  font-weight: 800;
  color: var(--brand);
}
.section p {
  color: var(--muted);
}
.alt {
  background: var(--acc);
  border-block: 1px solid var(--border);
}

/* ====== Layout ====== */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* Values grid */
.values {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  padding: 0;
  margin: 1.25rem 0 0;
  list-style: none;
}
.values li {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  text-align: center;
  font-weight: 600;
  color: var(--fg);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.values li:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.06);
}

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
  margin: 18px 0;
  transition: box-shadow 0.18s ease, transform 0.18s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.06);
}
.card h4 {
  margin: 0 0 0.4rem;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--brand);
}
.card p {
  color: var(--muted);
}

/* Contact */
.contact-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
}
.contact-list li {
  margin: 0.35rem 0;
  color: var(--fg);
  font-weight: 500;
}
.note {
  font-size: 0.92rem;
  color: var(--muted);
  margin-top: 0.6rem;
  font-style: italic;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  background: var(--acc);
  color: var(--muted);
  font-size: 0.95rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  gap: 18px;
}
.footer-grid nav a {
  display: block;
  margin-bottom: 6px;
  color: var(--brand-accent);
}
.footer-grid nav a:hover {
  color: var(--brand);
}

/* ====== Responsive ====== */
@media (max-width: 900px) {
  .hero h2 {
    font-size: 2rem;
  }
  .nav {
    justify-content: flex-end;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}
@media (max-width: 640px) {
  .logo {
    height: 24px;
  }
  .site-header .container {
    gap: 8px;
  }
  .nav {
    width: 100%;
    justify-content: center;
    border-top: 1px solid var(--border);
    padding: 6px 0;
  }
  .nav a {
    padding: 8px 10px;
  }
}

/* ====== Reduced motion ====== */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}