:root {
  --bg: #08111f;
  --panel: rgba(10, 24, 43, 0.88);
  --panel-border: rgba(148, 190, 255, 0.16);
  --text: #e8f0ff;
  --muted: #b1c1df;
  --accent: #7db3ff;
  --accent-strong: #4d8dff;
  --button-text: #06111f;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background:
    radial-gradient(circle at top, rgba(61, 115, 214, 0.22), transparent 35%),
    linear-gradient(180deg, #0a1324 0%, #060b14 100%);
  color: var(--text);
}

.page-shell {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.site-header,
.site-footer {
  padding: 12px 4px;
}

.wordmark {
  color: var(--text);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

main {
  display: grid;
  gap: 20px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero {
  padding: 40px 28px;
}

.eyebrow,
.section-label {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1,
h2,
h3,
p,
ul {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  line-height: 1.05;
  margin-bottom: 18px;
  max-width: 12ch;
}

h2 {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  line-height: 1.15;
  margin-bottom: 12px;
}

h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

p,
li {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.lede {
  max-width: 62ch;
  margin-bottom: 24px;
  font-size: 1.12rem;
}

ul {
  padding-left: 20px;
  margin-bottom: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: var(--button-text);
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 30px rgba(77, 141, 255, 0.35);
}

.button-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(148, 190, 255, 0.28);
}

.principle-grid {
  display: grid;
  gap: 16px;
}

.principle-grid article {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(148, 190, 255, 0.12);
}

.site-footer p {
  font-size: 0.96rem;
}

@media (min-width: 800px) {
  .page-shell {
    padding-top: 32px;
  }

  .hero {
    padding: 56px;
  }

  .card {
    padding: 36px;
  }

  .principle-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}