:root {
  --paper: #f4efe6;
  --paper-2: #fffdf8;
  --ink: #1b1915;
  --muted: #5e584e;
  --line: #d9d0c2;
  --teal: #114743;
  --teal-deep: #0c3331;
  --brass: #8a5a2b;
  --focus: #0b6e68;
  --shadow: 0 16px 40px rgba(27, 25, 21, 0.06);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Songti SC", "Noto Serif SC", "Source Han Serif SC", serif;
  --sans: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(138, 90, 43, 0.08), transparent 28rem),
    var(--paper);
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.7;
}

a {
  color: var(--teal);
}

a:hover {
  color: var(--teal-deep);
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--ink);
  color: white;
  padding: 0.5rem 0.8rem;
  z-index: 10;
}

.skip:focus {
  top: 1rem;
}

.wrap {
  width: min(1080px, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(244, 239, 230, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  color: inherit;
  text-decoration: none;
}

.brand strong {
  font-family: var(--serif);
  font-size: 1.35rem;
  letter-spacing: 0.04em;
}

.brand span {
  color: var(--muted);
  font-size: 0.85rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
}

.nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
}

.nav a[aria-current="page"] {
  color: var(--teal);
  box-shadow: inset 0 -2px 0 var(--brass);
}

.hero,
.page-hero {
  padding: 3.5rem 0 1.5rem;
}

.kicker {
  margin: 0 0 0.8rem;
  color: var(--brass);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.25;
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4rem);
  max-width: 14ch;
}

.lede {
  max-width: 40rem;
  color: var(--muted);
  font-size: 1.15rem;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding-bottom: 3rem;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  padding: 1.4rem 1.4rem 1.2rem;
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
  min-height: 100%;
}

a.card:hover {
  border-color: var(--teal);
}

.index {
  margin: 0;
  color: var(--brass);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

.card h2 {
  margin: 0;
  font-size: 1.8rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.meta span,
.tag {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.1rem 0.65rem;
  font-size: 0.82rem;
  color: var(--teal-deep);
  background: rgba(17, 71, 67, 0.05);
}

.card .go {
  margin-top: auto;
  color: var(--teal);
  font-weight: 600;
}

.entry {
  display: grid;
  gap: 0.4rem;
  margin: 1.5rem 0 2rem;
  padding: 1.2rem 1.3rem;
  background: var(--teal);
  color: #f6f1e7;
  border-radius: 1rem;
}

.entry p {
  margin: 0;
}

.entry a {
  color: white;
  font-size: 1.2rem;
  font-weight: 600;
}

.entry .label {
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #e4c39a;
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.8rem;
}

.steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.8rem;
  align-items: start;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  padding: 0.9rem 1rem;
}

.steps b {
  font-variant-numeric: tabular-nums;
  color: var(--brass);
}

.modules {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin: 0 0 2rem;
}

.modules article {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  padding: 1rem 1.1rem;
}

.modules h3 {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
}

.modules ul {
  margin: 0;
  padding-left: 1.1rem;
}

.section {
  padding-bottom: 2.2rem;
}

.section h2 {
  margin-bottom: 0.6rem;
}

.note {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.4rem 0 2rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer a {
  color: inherit;
}

@media (max-width: 800px) {
  .grid,
  .modules {
    grid-template-columns: 1fr;
  }

  .site-header .wrap {
    align-items: flex-start;
    flex-direction: column;
    padding: 0.8rem 0;
  }

  h1 {
    max-width: none;
  }
}