/* Colors */
:root {
  --color-darkest: rgba(0, 0, 17, 0.9); /* #000011e5 - 90% */
  --color-darker: rgba(0, 0, 17, 0.7); /* #000011b2 - 70% */
  --color-half: rgba(0, 0, 17, 0.5); /* #00001180 - 50% */
  --color-light: rgba(0, 0, 17, 0.1); /* #0000111a - 10% */
  --color-lighter: rgba(0, 0, 17, 0.05); /* #0000110d - 5% */
  --color-lightest: rgb(255, 255, 255); /* #fff */
}
.ghost {
  --color-darkest: rgba(255, 255, 255, 0.9); /* e5 - 90% */
  --color-darker: rgba(255, 255, 255, 0.7); /* b2 - 70% */
  --color-half: rgba(255, 255, 255, 0.5); /* 80 - 50% */
  --color-light: rgba(255, 255, 255, 0.1); /* 1a - 10% */
  --color-lighter: rgba(255, 255, 255, 0.05); /* 0d - 5% */
  --color-lightest: rgb(0, 0, 17); /* #001 */
}

@media (prefers-color-scheme: dark) {
  :root {
    /* copied from .ghost */
    --color-darkest: rgba(255, 255, 255, 0.9);
    --color-darker: rgba(255, 255, 255, 0.7);
    --color-half: rgba(255, 255, 255, 0.5);
    --color-light: rgba(255, 255, 255, 0.1);
    --color-lighter: rgba(255, 255, 255, 0.05);
    --color-lightest: rgb(0, 0, 17);
  }

  .ghost {
    /* copied from :root */
    --color-darkest: rgba(0, 0, 17, 0.9);
    --color-darker: rgba(0, 0, 17, 0.7);
    --color-half: rgba(0, 0, 17, 0.5);
    --color-light: rgba(0, 0, 17, 0.1);
    --color-lighter: rgba(0, 0, 17, 0.05);
    --color-lightest: rgb(255, 255, 255);
  }
}

/* Reset */
* {
  box-sizing: border-box;
}

body,
h1,
h2,
h3,
h4,
p {
  margin: 0;
}

h1,
h2,
h3,
h4,
p {
  text-wrap: balance;
}

/* Typography */
body {
  -webkit-font-smoothing: antialiased;
  background: var(--color-lightest);
  color: var(--color-darkest);
  font:
    500 100%/1 'DM Sans',
    system-ui,
    -apple-system,
    sans-serif;
  letter-spacing: 0.01em;
  text-rendering: geometricPrecision;
}

h1 {
  font-size: 2rem;
  font-weight: 500;
  line-height: 2.5rem;
}

h2 {
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1;
}

h3 {
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

h4 {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.25rem;
}

h1 + p,
h2 + p,
.lede {
  color: var(--color-half);
  font-size: 1.25rem;
  line-height: 1.5;
  max-width: 60rem;
}

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

/* Layout */
body {
  overflow-x: hidden;
}

.layer {
  display: flex;
  justify-content: center;
  padding: var(--space-clamp);
}

.layer-inset {
  flex: 1;
  max-width: 60rem;
}

section .layer-inset {
  align-items: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-clamp);
}

/* Components */

/* Card */
.card {
  background: var(--color-lightest);
  border: 1px solid var(--color-light);
  border-radius: 0.5rem;
}

.card-header,
.card-section,
.card-footer {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem;
}

.card-section {
  gap: 1rem;
  padding-top: 0;
}

/* Button */
.button {
  background: var(--color-darkest);
  border: 0;
  border-radius: 0.375rem;
  color: var(--color-lightest);
  cursor: pointer;
  display: inline-block;
  font-size: 1.25rem;
  line-height: 1.2;
  padding: 1rem 1.5rem;
  text-decoration: none;
}

.button-primary {
  background: var(--color-darkest);
  color: var(--color-lightest);
}

.button-secondary {
  background: var(--color-light);
}

.button-outline {
  background: transparent;
  border-color: var(--color-darkest);
}

/* Form */
input,
textarea {
  background: var(--color-lightest);
  border: 1px solid var(--color-light);
  border-radius: 0.375rem;
  color: var(--color-darkest);
  font: inherit;
  padding: 0.625rem 0.75rem;
}

input::placeholder {
  color: var(--color-half);
}

/* Chat */
.bubble {
  background: var(--color-lighter);
  border-radius: 0.375rem;
  display: inline-flex;
  padding: 0.625rem 0.75rem;
}

.bubble-right {
  align-self: flex-end;
  background: var(--color-darkest);
  color: var(--color-lightest);
}

/* Divider */
.line {
  background: var(--color-lighter);
  height: 1px;
}

/* User */
.user-item {
  align-items: center;
  display: flex;
  gap: 1rem;
}

.user-item img {
  border-radius: 50%;
  height: 2.5rem;
  width: 2.5rem;
}

/* Icons */
.icon {
  font-family: 'Font Awesome 7 Pro', sans-serif;
  font-size: 1rem;
  font-style: normal;
  font-weight: 400;
  line-height: 1.25rem;
}

.icon-small {
  font-family: 'Font Awesome 7 Pro', sans-serif;
  font-size: 0.75rem;
  font-style: normal;
  font-weight: 400;
  line-height: 1.25rem;
}

.icon-solid {
  font-family: 'Font Awesome 7 Pro', sans-serif;
  font-size: 1rem;
  font-style: normal;
  font-weight: 900;
  line-height: 1.25rem;
}

/* Utilities */
.fill {
  flex: 1;
}

.row {
  display: flex;
  gap: 0.5rem;
}