:root {
  --paper: #e7eef6;
  --ink: #15202b;
  --muted: #5a6a7a;
  --field: #fbfcfe;
  --line: #c3d0de;
  --ghost: #8fa0b2;
  --complete: #2156c9;
  --skip-wash: #f3e6dc;
  --skip-line: #d7b9a4;
  --skip-ink: #7a3b16;
  --focus: #2156c9;
}

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

html {
  font-size: 17px;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(1200px 480px at 12% -10%, #dbe6f3 0%, transparent 60%),
    var(--paper);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  line-height: 1.5;
}

.page {
  width: min(42rem, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 3.25rem 0 4.5rem;
}

.kicker {
  margin: 0 0 0.65rem;
  color: var(--complete);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 0.85rem;
  font-family: "IBM Plex Serif", Georgia, serif;
  font-size: clamp(2rem, 5vw, 2.85rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.ghost {
  color: var(--ghost);
  font-weight: 400;
  font-style: italic;
}

.lede {
  margin: 0 0 1.35rem;
  max-width: 36rem;
  color: var(--muted);
}

.steps {
  margin: 0 0 2.5rem;
  padding: 1rem 1.15rem 1rem 2.15rem;
  background: color-mix(in srgb, white 62%, var(--paper));
  border: 1px solid var(--line);
  border-radius: 10px;
}

.steps li + li {
  margin-top: 0.28rem;
}

.steps a {
  color: var(--complete);
  text-underline-offset: 0.14em;
}

.steps a:hover {
  color: var(--ink);
}

.steps a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 3px;
}

kbd {
  display: inline-block;
  padding: 0.05em 0.4em;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--field);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.84em;
}

.panel {
  padding: 1.35rem 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
  background: color-mix(in srgb, white 74%, var(--paper));
  border: 1px solid var(--line);
  border-radius: 12px;
}

.panel.skip {
  background: var(--skip-wash);
  border-color: var(--skip-line);
}

h2 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.panel.skip h2 {
  color: var(--skip-ink);
}

.hint {
  margin: 0.2rem 0 1.1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

label {
  display: block;
  margin: 0.9rem 0 0.35rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

input,
textarea,
.editor {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0.7rem 0.8rem;
  color: var(--ink);
  background: var(--field);
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  line-height: 1.45;
}

textarea,
.editor {
  min-height: 10rem;
  resize: vertical;
}

.editor {
  overflow: auto;
  white-space: pre-wrap;
}

.editor:empty::before {
  content: attr(data-placeholder);
  color: var(--ghost);
}

.panel.skip input {
  background: #fffaf6;
  border-color: var(--skip-line);
}

input:focus,
textarea:focus,
.editor:focus {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .page {
    width: min(42rem, calc(100% - 1.5rem));
    padding-top: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto;
  }
}