:root {
  --text: #3a3140;
  --muted: #766878;
  --accent: #4d87a0;
  --border: rgba(80, 62, 80, 0.10);
  --surface: rgba(255,255,255,0.82);
  --shadow: 0 18px 40px rgba(50, 34, 50, 0.10);
}

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

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top right, rgba(127, 181, 201, 0.18), transparent 24%), linear-gradient(180deg, #f7fbff 0%, #eef5fb 100%);
  color: var(--text);
  line-height: 1.65;
}

.container {
  width: min(calc(100% - 2rem), 880px);
  margin: 0 auto;
}

.narrow {
  max-width: 720px;
}

.header {
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.70);
  backdrop-filter: blur(10px);
}

.header h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: -0.03em;
}

.subtitle {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-weight: 600;
}

.main {
  padding: 3rem 0 4rem;
}

.hero {
  padding: 2rem 0 1.5rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
}

.hero h2 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: -0.03em;
  max-width: 14ch;
}

.intro {
  font-size: 1.08rem;
  color: #5e5261;
  max-width: 58ch;
}

.content-card {
  padding-top: 1rem;
}

.content-card .narrow {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

h3 {
  margin-top: 0;
  font-size: 1.25rem;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 1.2rem 0 2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 700px) {
  .main {
    padding-top: 2rem;
  }

  .content-card .narrow {
    padding: 1.2rem;
  }
}