:root {
  --bg: #f7f4ee;
  --paper: #fffdf8;
  --ink: #1f2937;
  --muted: #5b6472;
  --line: #ded7ca;
  --accent: #0f766e;
  --accent-soft: #d9f0ed;
  --warn: #9a3412;
  --good: #166534;
  --shadow: 0 10px 30px rgba(31, 41, 55, 0.08);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: ui-serif, Georgia, 'Times New Roman', serif;
  color: var(--ink);
  background: linear-gradient(180deg, var(--bg), #ffffff 28%);
  line-height: 1.6;
}
main {
  max-width: 920px;
  margin: 0 auto;
  padding: 40px 20px 64px;
}
header.hero {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow);
}
.kicker {
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--accent);
  font-size: .78rem;
  font-weight: 700;
}
h1, h2, h3 { line-height: 1.15; }
h1 { margin: 10px 0 8px; font-size: clamp(2rem, 4vw, 3.3rem); }
h2 { margin: 0 0 12px; font-size: 1.55rem; }
h3 { margin: 0 0 8px; font-size: 1.1rem; }
p { margin: 0 0 14px; }
small, .muted, .note { color: var(--muted); }
.grid {
  display: grid;
  gap: 16px;
}
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 760px) {
  .grid.cols-2 { grid-template-columns: 1fr; }
}
.card, section.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px;
  margin-top: 18px;
  box-shadow: var(--shadow);
}
.card.soft {
  background: linear-gradient(180deg, var(--accent-soft), #ffffff);
}
ol.steps, ul.clean {
  margin: 0;
  padding-left: 20px;
}
.steps li, .clean li { margin: 8px 0; }
.tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #faf8f3;
  color: var(--muted);
  font-size: .85rem;
  margin: 0 8px 8px 0;
}
.callout {
  border-left: 4px solid var(--accent);
  padding: 14px 16px;
  background: #f3fbf9;
  border-radius: 0 12px 12px 0;
}
.callout.warn { border-left-color: var(--warn); background: #fff7ed; }
.callout.good { border-left-color: var(--good); background: #f0fdf4; }
a { color: var(--accent); text-decoration-thickness: 2px; text-underline-offset: 2px; }
a:hover { text-decoration: underline; }
nav.breadcrumbs {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: .95rem;
}
nav.breadcrumbs a::after { content: '·'; color: var(--muted); margin-left: 10px; }
nav.breadcrumbs a:last-child::after { content: ''; }
.rule {
  border-top: 1px solid var(--line);
  margin: 18px 0;
}
.quiz {
  display: grid;
  gap: 14px;
}
.question {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  background: #fff;
}
.question .prompt { font-weight: 700; margin-bottom: 10px; }
.question label {
  display: block;
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 10px;
  cursor: pointer;
}
.question label:hover { background: #faf8f3; border-color: var(--line); }
.quiz button {
  margin-top: 10px;
  border: 0;
  border-radius: 10px;
  padding: 9px 14px;
  background: var(--accent);
  color: white;
  font-weight: 700;
  cursor: pointer;
}
.quiz button:hover { filter: brightness(1.05); }
.feedback { margin-top: 10px; font-weight: 700; }
.feedback.good { color: var(--good); }
.feedback.bad { color: var(--warn); }
.feedback.warn { color: var(--muted); }
footer {
  margin-top: 24px;
  color: var(--muted);
  font-size: .95rem;
}
@media print {
  body { background: white; }
  main { max-width: none; padding: 0; }
  header.hero, .card, section.panel { box-shadow: none; }
  a { color: inherit; text-decoration: none; }
  .quiz button { display: none; }
}