:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-soft: #e8f2fb;
  --color-text: #1f2937;
  --color-heading: #1f3a5f;
  --color-link: #4a90d9;
  --color-accent: #2f5e88;
  --color-cta: #2e6f7e;
  --color-cta-hover: #255a66;
  --color-border: rgba(31, 58, 95, 0.12);
  --shadow-soft: 0 14px 38px rgba(31, 58, 95, 0.06);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-pill: 999px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --container: 1100px;
  --container-narrow: 760px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3 {
  margin: 0 0 var(--space-3);
  color: var(--color-heading);
  line-height: 1.25;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
}

h2 {
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
}

h3 {
  font-size: 1.2rem;
}

p {
  margin: 0 0 var(--space-4);
}

ul {
  margin: 0;
  padding-left: 1.2rem;
}

section {
  padding: 6rem 1.5rem;
}

.container {
  width: min(100%, var(--container));
  margin: 0 auto;
}

.container-narrow {
  width: min(100%, var(--container-narrow));
  margin: 0 auto;
}

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

.text-left {
  text-align: left;
}

.surface {
  background: var(--color-surface);
}

.surface-soft {
  background: var(--color-surface-soft);
}

.muted {
  opacity: 0.82;
}