:root {
  color-scheme: light;
  --paper: #fbfaf7;
  --ink: #1b1f24;
  --muted: #5d6570;
  --line: #d8d3c8;
  --blue: #2457a6;
  --green: #2d6f57;
  --amber: #a65f00;
  --red: #a33a3a;
  --violet: #6a4fb3;
  --panel: #ffffff;
  --code: #f1efe8;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 17px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  line-height: 1.55;
}

a {
  color: var(--blue);
  text-underline-offset: 0.18em;
}

code,
kbd {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--code);
  color: #111318;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  padding: 0.08rem 0.28rem;
}

pre {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--code);
  padding: 0.9rem 1rem;
}

pre code {
  border: 0;
  background: transparent;
  padding: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.6rem;
  font-size: 0.94rem;
}

th,
td {
  border-top: 1px solid var(--line);
  padding: 0.55rem 0.45rem;
  text-align: left;
  vertical-align: top;
}

th {
  color: #29313a;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 4.5rem 1.35rem 5rem;
}

.wide-page {
  max-width: 1040px;
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--violet);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
  line-height: 1.12;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.8rem);
}

h2 {
  margin: 2.4rem 0 0.75rem;
  font-size: 1.35rem;
}

h3 {
  margin: 1.35rem 0 0.35rem;
  font-size: 1.02rem;
}

.lead {
  max-width: 720px;
  margin: 1.1rem 0 0;
  color: #343b44;
  font-size: 1.18rem;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.9rem;
  margin: 1.25rem 0 0;
  color: var(--muted);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.88rem;
}

.rule {
  height: 1px;
  margin: 2rem 0;
  background: var(--line);
}

.callout {
  border-left: 4px solid var(--blue);
  background: rgba(255, 255, 255, 0.62);
  padding: 0.95rem 1rem;
  margin: 1.2rem 0;
}

.callout strong {
  color: var(--blue);
}

.warning {
  border-left-color: var(--amber);
}

.warning strong {
  color: var(--amber);
}

.success {
  border-left-color: var(--green);
}

.success strong {
  color: var(--green);
}

.flow {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.65rem;
  margin: 1.2rem 0;
}

.flow span {
  min-height: 4.1rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  padding: 0.75rem;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.84rem;
  font-weight: 700;
}

.flow small {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font-weight: 500;
}

.step-list {
  counter-reset: steps;
  list-style: none;
  padding: 0;
}

.step-list li {
  counter-increment: steps;
  display: grid;
  grid-template-columns: 2.3rem 1fr;
  gap: 0.75rem;
  margin: 1rem 0;
}

.step-list li::before {
  content: counter(steps);
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--panel);
  color: var(--blue);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 800;
}

.practice {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 1rem;
  margin: 1.3rem 0;
}

.check-row {
  display: grid;
  grid-template-columns: 1fr minmax(170px, 260px) auto;
  gap: 0.55rem;
  align-items: center;
  padding: 0.65rem 0;
  border-top: 1px solid var(--line);
}

.check-row:first-of-type {
  border-top: 0;
}

input[type="text"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  padding: 0.45rem 0.55rem;
}

button {
  min-height: 2.2rem;
  border: 1px solid #1f4d92;
  border-radius: 5px;
  background: var(--blue);
  color: #fff;
  cursor: pointer;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.35rem 0.7rem;
}

.feedback {
  grid-column: 2 / 4;
  min-height: 1.2rem;
  color: var(--muted);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.84rem;
}

.feedback[data-state="correct"] {
  color: var(--green);
}

.feedback[data-state="wrong"] {
  color: var(--red);
}

.source-list {
  padding-left: 1.1rem;
}

.source-list li {
  margin: 0.45rem 0;
}

.compact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.print-note {
  color: var(--muted);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.9rem;
}

@media (max-width: 760px) {
  .page {
    padding-top: 2.2rem;
  }

  .flow,
  .compact-grid,
  .check-row {
    grid-template-columns: 1fr;
  }

  .feedback {
    grid-column: auto;
  }
}

@media print {
  body {
    background: #fff;
  }

  .page,
  .wide-page {
    max-width: none;
    padding: 0;
  }

  button,
  input {
    display: none;
  }

  a {
    color: #000;
  }
}