html {
  font-size: 100%; /* 1rem = 16px */
}

h1 { font-size: clamp(1.625rem, 5vw, 2.5rem); line-height: 1.25; }
h2 { font-size: clamp(1.375rem, 4vw, 2rem); line-height: 1.25; }
h3 { font-size: clamp(1.25rem, 3.5vw, 1.75rem); line-height: 1.3; }
h4 { font-size: clamp(1.125rem, 3vw, 1.5rem); line-height: 1.3; }
h5 { font-size: clamp(1rem, 2.5vw, 1.25rem); line-height: 1.4; }
h6 { font-size: clamp(0.875rem, 2vw, 1.125rem); line-height: 1.4; }

body, p {
  font-size: clamp(0.875rem, 2vw, 1rem); /* 14–16px */
  line-height: 1.5;
}

html {
  scroll-behavior: auto !important;
}