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

html {
  -webkit-text-size-adjust: 100%;
}

/* The hidden attribute stops working the moment an element also matches an
   author rule that sets `display` (e.g. `.mode-panel { display: flex }`),
   since normal-priority author CSS always beats the browser's built-in
   `[hidden] { display: none }`, regardless of selector specificity. Restore
   it globally so `hidden` can be relied on everywhere. */
[hidden] {
  display: none !important;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 var(--space-3);
  color: var(--color-text);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.125rem; }

p {
  margin: 0 0 var(--space-3);
  color: var(--color-text-muted);
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

img, svg {
  max-width: 100%;
  display: block;
}

input, button, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (max-width: 600px) {
  .container {
    padding: 0 var(--space-3);
  }

  h1 { font-size: 1.5rem; }
}