what-new-in-chrome/public/demo/modern-web-guidance/styles.css

:root {
  color-scheme: light;
  --ink: #17202a;
  --muted: #5f6f78;
  --paper: #fffef8;
  --panel: #eff4ef;
  --line: #cfd9cd;
  --green: #0b6b4f;
  --blue: #174ea6;
  --amber: #a46400;
  --code: #14202a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgb(23 32 42 / 0.05) 1px, transparent 1px),
    linear-gradient(rgb(23 32 42 / 0.05) 1px, transparent 1px),
    #edf4ef;
  background-size: 30px 30px;
  font-family: ui-sans-serif, "PingFang SC", "Microsoft YaHei", sans-serif;
}

button {
  min-height: 42px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
  cursor: pointer;
  padding: 10px 14px;
  font: inherit;
  font-weight: 900;
}

.shell {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 40px 0 64px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 14px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(42px, 7vw, 86px);
  line-height: 0.9;
}

.hero p,
.demo p,
.result li {
  color: var(--muted);
  line-height: 1.72;
}

.grid,
.demo {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.82fr);
  gap: 20px;
  margin-top: 24px;
}

.terminal,
.result,
.demo {
  border: 1px solid var(--line);
  background: rgb(255 254 248 / 0.92);
  box-shadow: 0 18px 58px rgb(23 32 42 / 0.12);
}

.terminal,
.result {
  padding: 20px;
}

.terminal {
  background: var(--code);
  color: #dfe8ef;
}

.terminal-head {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 14px;
}

.terminal-head span {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: #e15c4f;
}

.terminal-head span:nth-child(2) {
  background: #e5ad35;
}

.terminal-head span:nth-child(3) {
  background: #42aa6d;
}

.terminal-head strong {
  margin-left: 8px;
  color: #9fb0be;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

pre {
  overflow: auto;
  margin: 0 0 16px;
  white-space: pre-wrap;
  font-size: 14px;
  line-height: 1.65;
}

.result ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 18px;
}

.demo {
  align-items: start;
  padding: 24px;
}

code {
  border: 1px solid rgb(23 32 42 / 0.13);
  background: #fff;
  padding: 1px 5px;
}

.code {
  border: 1px solid #2d3944;
  background: var(--code);
  color: #dfe8ef;
  padding: 16px;
}

dialog {
  width: min(520px, calc(100vw - 36px));
  border: 1px solid var(--line);
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  opacity: 0;
  transform: translateY(16px) scale(0.96);
  transition-property: opacity, transform, display, overlay;
  transition-duration: 220ms;
  transition-timing-function: ease-out;
  transition-behavior: allow-discrete;
}

dialog[open] {
  opacity: 1;
  transform: translateY(0) scale(1);
}

@starting-style {
  dialog[open] {
    opacity: 0;
    transform: translateY(16px) scale(0.96);
  }
}

dialog::backdrop {
  background: rgb(12 18 24 / 0);
  transition:
    display 220ms allow-discrete,
    overlay 220ms allow-discrete,
    background-color 220ms ease-out;
}

dialog[open]::backdrop {
  background: rgb(12 18 24 / 0.42);
}

dialog form {
  display: grid;
  gap: 12px;
  padding: 24px;
}

@media (prefers-reduced-motion: reduce) {
  dialog {
    transform: none;
    transition-duration: 80ms;
  }
}

@media (max-width: 880px) {
  .grid,
  .demo {
    grid-template-columns: 1fr;
  }
}