:root {
  --iu-blue-950: #031b4e;
  --iu-blue-900: #06337a;
  --iu-blue-800: #0648a8;
  --iu-blue-700: #0b5ed7;
  --iu-blue-600: #1479ff;
  --iu-blue-100: #eaf3ff;
  --iu-blue-50: #f5f9ff;

  --iu-sky: #3399d0;
  --iu-indigo: #2f398e;
  --iu-gold: #f4b400;
  --iu-red: #d62828;

  --text-main: #0f172a;
  --text-muted: #64748b;

  --bg-body: #f8fafc;
  --bg-white: #ffffff;

  --border-soft: #e2e8f0;

  --shadow-sm: 0 10px 25px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 18px 45px rgba(15, 23, 42, 0.12);
  --shadow-blue: 0 22px 60px rgba(6, 72, 168, 0.22);

  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;

  /* Shared layout rhythm: 24px per side on desktop. */
  --iu-container-max: 1360px;
  --iu-container-offset: 48px;
  --iu-readable-max: 1180px;
  --container: var(--iu-container-max);

  /* Typography scale shared with the dao-tao pages. */
  --iu-font-sans: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --iu-type-body: 1rem;
  --iu-type-small: .9rem;
  --iu-type-label: .78rem;
  --iu-type-card-title: 1.05rem;
  --iu-type-section-title: 1.35rem;
  --iu-type-hero-title: clamp(3.1rem, 5.2vw, 5rem);
  --iu-leading-body: 1.65;
  --iu-leading-card-title: 1.3;
  --iu-leading-section-title: 1.2;
  --iu-leading-hero-title: .95;
  --iu-weight-card-title: 800;
  --iu-weight-section-title: 900;
  --iu-weight-hero-title: 900;

  --iu-inner-page-hero-height: 350px;
  --iu-inner-page-hero-height-mobile: 320px;
}

@media (max-width: 900px) {
  :root {
    --iu-container-offset: 36px;
  }
}

@media (max-width: 760px) {
  :root {
    --iu-container-offset: 28px;
  }
}

@media (max-width: 520px) {
  :root {
    --iu-container-offset: 24px;
  }
}