:root {
  --bg: #f3f7fb;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --border: #d7e1ed;
  --brand: #0f3f8a;
  --brand-soft: #e5f0ff;
  --accent: #0ea5e9;
  --shadow: 0 6px 24px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at top, #e9f2ff 0%, #f3f7fb 45%, #f3f7fb 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.top-nav {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(8px);
}

.top-nav-inner {
  min-height: 52px;
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.top-nav-inner a {
  color: var(--text);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-size: 0.86rem;
  font-weight: 600;
  padding: 0.35rem 0.7rem;
}

.hero {
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at 90% -20%, rgba(14, 165, 233, 0.18), transparent 45%),
    radial-gradient(circle at 0% 0%, rgba(15, 63, 138, 0.15), transparent 40%),
    #f8fbff;
}

.hero-inner {
  padding: 2.75rem 0 2.25rem;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.brand-logo {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  background: #fff;
}

.eyebrow {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: #2c5282;
  font-weight: 700;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  margin-top: 0.2rem;
}

h2 {
  font-size: clamp(1.3rem, 2.2vw, 1.7rem);
  margin-bottom: 0.9rem;
}

h3 {
  font-size: 1.03rem;
  margin-bottom: 0.45rem;
}

.hero-copy {
  margin: 1rem 0 1.2rem;
  max-width: 820px;
  color: #1f3a63;
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.58rem 1rem;
  text-decoration: none;
  color: var(--text);
  background: #fff;
  font-weight: 600;
  font-size: 0.92rem;
}

.btn-primary {
  border-color: transparent;
  background: linear-gradient(120deg, #0f3f8a, #1d4ed8);
  color: #fff;
}

.btn[aria-disabled='true'] {
  opacity: 0.75;
  pointer-events: none;
}

.hero-sub {
  margin: 0.95rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.main-content {
  padding: 1.8rem 0 3.5rem;
  display: grid;
  gap: 1.5rem;
}

section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 1.15rem;
}

.section-copy {
  margin: 0 0 0.85rem;
  color: var(--muted);
  font-size: 0.93rem;
}

.stats-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.stat-card {
  border: 1px solid var(--border);
  border-top: 4px solid var(--accent);
  border-radius: 14px;
  background: #fcfdff;
  padding: 0.8rem;
}

.stat-value {
  margin: 0;
  font-size: 1.45rem;
  font-weight: 700;
  color: #0f3f8a;
}

.stat-label {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.83rem;
}

.cards-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.card {
  border: 1px solid var(--border);
  border-top: 4px solid #8bc7ff;
  border-radius: 14px;
  background: #fff;
  padding: 0.85rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.card .equation {
  margin-top: 0.55rem;
  border: 1px dashed var(--border);
  background: #f8fbff;
  border-radius: 10px;
  padding: 0.35rem 0.5rem;
  color: #1f3a63;
  font-weight: 600;
}

.split {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.list {
  display: grid;
  gap: 0.6rem;
}

.list-row {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  padding: 0.72rem;
}

.list-row p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.list-row a {
  display: inline-block;
  margin-top: 0.45rem;
  color: var(--brand);
  font-weight: 600;
  text-decoration: none;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.42rem;
  margin-top: 0.5rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--brand-soft);
  color: #1f3a63;
  font-size: 0.76rem;
  padding: 0.28rem 0.62rem;
  font-weight: 600;
}

.gallery {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  margin-top: 0.5rem;
}

.gallery img {
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
}

.small-note {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.cta {
  border-top: 4px solid #1d4ed8;
  background: linear-gradient(160deg, #f8fbff 0%, #ffffff 70%);
}

.cta p {
  margin: 0.55rem 0 0;
}

.cta a {
  color: var(--brand);
  font-weight: 700;
  text-decoration: none;
}

.footer {
  padding: 0 0 1.6rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.45rem;
  font-size: 0.82rem;
}

@media (max-width: 720px) {
  .hero-inner {
    padding-top: 2.2rem;
  }

  section {
    padding: 0.95rem;
  }
}