:root {
  --color-dark: hsl(210, 20%, 10%);
  --color-gray: hsl(210, 10%, 55%);
  --color-light: hsl(210, 20%, 90%);
  --color-white: hsl(0, 0%, 100%);
  --color-black: hsl(0, 0%, 0%);
  --color-link: hsl(208, 100%, 62%);
  --color-primary: hsl(50, 85%, 50%);

  --space-3xs: clamp(0.31rem, 0.31rem + 0vw, 0.31rem);
  --space-2xs: clamp(0.56rem, 0.54rem + 0.11vw, 0.63rem);
  --space-xs: clamp(0.88rem, 0.85rem + 0.11vw, 0.94rem);
  --space-s: clamp(1.13rem, 1.08rem + 0.22vw, 1.25rem);
  --space-m: clamp(1.69rem, 1.62rem + 0.33vw, 1.88rem);
  --space-l: clamp(2.25rem, 2.16rem + 0.43vw, 2.5rem);
  --space-xl: clamp(3.38rem, 3.24rem + 0.65vw, 3.75rem);

  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -4px rgb(0 0 0 / 0.1);

  /* Typography */
  font-size: clamp(1rem, 0.5vw + 0.9rem, 1.1rem);
  --font-base: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --measure: 60ch;

  /* Font size scale using a ratio close to 1.2 (minor third) */
  --step--2: clamp(0.7rem, 0.72rem + -0.03vw, 0.72rem); /* Small text */
  --step--1: clamp(0.84rem, 0.85rem + -0.02vw, 0.86rem); /* Secondary text */
  --step-0: clamp(1rem, 1rem + 0vw, 1rem); /* Body text */
  --step-1: clamp(1.2rem, 1.18rem + 0.04vw, 1.22rem); /* Large body */
  --step-2: clamp(1.44rem, 1.38rem + 0.1vw, 1.49rem); /* H3 */
  --step-3: clamp(1.73rem, 1.62rem + 0.21vw, 1.83rem); /* H2 */
  --step-4: clamp(2.07rem, 1.89rem + 0.37vw, 2.24rem); /* H1 */
  --step-5: clamp(2.49rem, 2.19rem + 0.61vw, 2.73rem); /* Hero text */

  /* Line heights */
  --leading-sm: 1.2; /* Headings */
  --leading-base: 1.5; /* Body text */
  --leading-lg: 1.7; /* Small text */

  --radius: 0.4em;
}

html {
  min-height: 100dvh;
  box-sizing: border-box;
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  scroll-behavior: smooth;
}

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

@media (prefers-reduced-motion) {
  *,
  *::before,
  *::after {
    animation-duration: 0s !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

* {
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100dvh;
  max-width: clamp(300px, 90%, 1200px);
  margin: 0 auto;
  font-size: var(--step-0);
  line-height: var(--leading-base);
  color: var(--color-light);
  background: var(--color-dark);
  font-family: var(--font-base);
}

p,
h1,
h2,
h3 {
  overflow-wrap: break-word;
  word-break: break-word;
}

:is(p, li) {
  max-inline-size: var(--measure);
  text-wrap: pretty;
}

:is(h1, h2, h3) {
  font-weight: bold;
  text-wrap: balance;
  line-height: var(--leading-sm);
}

.text-small {
  font-size: var(--step--2);
  line-height: var(--leading-lg);
}

.text-hero {
  font-size: var(--step-5);
  line-height: var(--leading-sm);
  color: var(--color-primary);
}

p,
li,
input,
button {
  font-size: var(--step-0);
  line-height: var(--leading-base);
}

h3 {
  font-size: var(--step-2);
}

h2 {
  font-size: var(--step-3);
}

h1 {
  font-size: var(--step-4);
}

/* Base vertical rhythm */
* + h1,
* + h2,
* + h3 {
  margin-block-start: var(--space-xl);
}

* + p {
  margin-block-start: var(--space-s);
}

/* Specific heading adjustments */
h1 {
  margin-block-end: var(--space-m);
}

h2 {
  margin-block-end: var(--space-s);
}

h3 {
  margin-block-end: var(--space-xs);
}

/* Lists */
ul {
  list-style: none;
}

ol,
ul {
  list-style-position: inside;
}

* + ul,
* + ol {
  margin-block-start: var(--space-s);
}

ul,
ol {
  margin-block-end: var(--space-s);
}

ol {
  list-style: none;
  counter-reset: steps;
}

ol li {
  counter-increment: steps;
}

ol li:before {
  content: counter(steps) ' ';
  font-weight: 800;
  color: var(--color-primary);
  font-size: var(--step-1);
  padding-right: var(--space-3xs);
}

/* Larger spacing for sections */
section + section {
  margin-block-start: var(--space-xl);
}

/* Handle nested content */
article * + * {
  margin-block-start: var(--space-s);
}

hr {
  margin-block: var(--space-l);
  border: none;
  border-top: 0.15em solid var(--color-gray);
  color: var(--color-gray);
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  border-radius: var(--radius);
}

input {
  padding-block: var(--space-2xs);
  padding-inline: var(--space-2xs);
  background-color: var(--color-white);
  color: var(--color-dark);
}

button {
  -webkit-appearance: none;
  appearance: none;
  text-align: center;
  color: var(--color-black);
  background-color: var(--color-link);
  box-shadow: none;
  cursor: pointer;
  border: none;
  padding-block: var(--space-2xs);
  padding-inline: var(--space-s);
  font-weight: 800;
}

button:hover {
  opacity: 0.9;
}

a:not([class]) {
  color: var(--color-link);
  text-decoration: none;
  text-underline-offset: 0.2em;
}

a:not([class]):hover,
a:not([class]):focus {
  text-decoration: underline;
  text-decoration-thickness: 0.15em;
}

img {
  max-width: 100%;
  display: block;
  height: auto;
  border-radius: var(--radius);
}

*:focus {
  outline: 0.125em solid transparent;
  outline-offset: 0.125em;
}

*:focus-visible {
  outline: 0.125em solid var(--color-primary);
  outline-offset: 0.25em;
  border-radius: var(--radius);
}

:target {
  scroll-margin-block: 5ex;
}

footer {
  padding-block: var(--space-m);
  margin-block-start: var(--space-l);
}