body {
  font-family: var(--sans);
}

a {
  color: inherit;
  text-decoration: none;
}

.page {
  max-width: var(--shell-curriculum);
  margin: 0 auto;
  min-height: 100vh;
  background: var(--paper);
}

header {
  height: 68px;
  display: flex;
  align-items: center;
  padding: 0 var(--space-7);
  border-bottom: var(--rule);
}

.logo {
  font-family: var(--serif);
  font-size: 17px;
  letter-spacing: 2.15px;
}

.nav {
  margin-left: auto;
  display: flex;
  gap: var(--space-5);
  align-items: center;
  font-size: 13px;
}

.hero {
  padding: var(--space-7) var(--space-7) var(--space-6);
  border-bottom: var(--rule);
}

.eyebrow {
  font-size: 11px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  border-left: 2px solid rgba(142, 94, 36, 0.45);
  padding-left: var(--space-3);
  margin-bottom: 18px;
  color: #564838;
}

.hero h1 {
  font-family: var(--serif);
  font-size: 42px;
  line-height: 1.12;
  font-weight: 400;
  letter-spacing: -1px;
  margin: 0 0 var(--space-3);
}

.hero p {
  font-family: var(--serif);
  max-width: var(--measure-reading);
  font-size: var(--space-4);
  line-height: 1.7;
  margin: 0;
  color: var(--ink-secondary);
}

.intro {
  padding: var(--space-6) var(--space-7) 0;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.65;
  max-width: var(--measure-reading);
}

.note {
  border-top: var(--rule);
  padding: 25px var(--space-7) 34px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.foot,
footer {
  border-top: var(--rule);
  padding: 22px var(--space-7) 34px;
  font-size: 13px;
  color: var(--muted);
}

.foot {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.foot a,
.footlinks a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.number {
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--bronze);
}

/* Library */
.shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 680px;
}

.sidebar {
  border-right: var(--rule);
  padding: var(--space-6) 22px 40px var(--space-7);
  background: var(--paper-soft);
}

.sidebar h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: var(--space-4);
  margin: 0 0 18px;
}

.work {
  display: block;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  border-radius: var(--radius-square);
  font-size: 14px;
  cursor: pointer;
  color: var(--muted);
}

.work:hover {
  color: var(--bronze);
  background: transparent;
  text-decoration: underline;
  text-decoration-color: var(--link-hover-underline);
  text-underline-offset: 2px;
}

.work.active {
  color: var(--ink);
  background: transparent;
  border-left-color: var(--bronze);
  font-weight: 500;
  text-decoration: none;
}

.work:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  box-shadow: none;
}

.small {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.55;
  margin-top: 22px;
}

.content {
  padding: var(--space-6) var(--space-7) 70px;
}

.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: var(--space-5);
}

.toolbar input,
.toolbar select {
  min-height: var(--target-essential);
  height: var(--target-essential);
  border: var(--rule);
  border-radius: var(--radius-square);
  background: var(--paper);
  font-size: var(--space-4);
  -webkit-appearance: none;
  appearance: none;
}

.toolbar input {
  flex: 1;
  min-width: 0;
  padding: 0 var(--space-3);
}

.toolbar select {
  padding: 0 32px 0 10px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236e665b' d='M1 1.5 6 6.5 11 1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 12px 8px;
}

.toolbar input:focus,
.toolbar select:focus,
.toolbar input:focus-visible,
.toolbar select:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  box-shadow: 0 0 0 2px var(--charcoal);
}

.status {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 18px;
}

.status.is-loading {
  margin-bottom: 10px;
}

.library-loading {
  margin-bottom: 18px;
}

.library-loading[hidden] {
  display: none;
}

.library-skeleton {
  border-top: var(--rule);
  padding: 22px 0 24px;
}

.library-skeleton + .library-skeleton {
  padding-top: 18px;
}

.library-skeleton-line {
  display: block;
  height: 11px;
  margin-bottom: 11px;
  max-width: 100%;
  background: var(--paper-note);
}

.library-skeleton-line.wide {
  width: min(18em, 72%);
  height: 16px;
  margin-bottom: 14px;
}

.library-skeleton-line.medium {
  width: min(28em, 92%);
}

.library-skeleton-line:last-child {
  margin-bottom: 0;
  width: min(22em, 78%);
}

@media (prefers-reduced-motion: no-preference) {
  .library-loading .library-skeleton-line {
    animation: library-skeleton-pulse 1.35s ease-in-out infinite;
  }

  .library-skeleton:nth-child(2) .library-skeleton-line {
    animation-delay: 0.12s;
  }

  .library-skeleton:nth-child(3) .library-skeleton-line {
    animation-delay: 0.24s;
  }
}

@keyframes library-skeleton-pulse {
  0%,
  100% {
    opacity: 0.45;
  }

  50% {
    opacity: 0.9;
  }
}

.library-more-wrap {
  border-top: var(--rule);
  padding: 22px 0 10px;
}

.library-more {
  display: inline-block;
  min-height: var(--target-essential);
  padding: 0 var(--space-4);
  border: var(--rule);
  border-radius: var(--radius-square);
  background: transparent;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--ink);
  cursor: pointer;
}

.library-more:hover {
  color: var(--bronze);
  border-color: var(--emphasis-rule-soft);
  background: transparent;
}

.library-more:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  box-shadow: 0 0 0 1px var(--charcoal);
}

.section {
  border-top: var(--rule);
  padding: 22px 0 26px;
}

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

.section h2 {
  font-family: var(--serif);
  font-size: 20px;
  line-height: 1.45;
  font-weight: 400;
  margin: 0 0 14px;
}

.meta {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 15px;
}

.passage {
  font-family: var(--serif);
  font-size: var(--space-4);
  line-height: 1.8;
  white-space: pre-wrap;
  margin: 0 0 18px;
  max-width: var(--measure-reading);
}

.passage:last-child {
  margin-bottom: 0;
}

.anchor {
  font-family: var(--sans);
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 7px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.empty,
.error {
  border: 0;
  border-top: var(--rule);
  border-radius: var(--radius-square);
  background: transparent;
  padding: 18px 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted);
}

.error {
  color: #6a4e48;
}

.focused {
  scroll-margin-top: 18px;
  background: transparent;
  outline: none;
  padding-left: 14px;
  border-left: 2px solid var(--bronze);
}

.focused h2::before {
  content: "Source passage";
  display: block;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--bronze);
  margin-bottom: 7px;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.footlinks {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* Principles */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: var(--space-6) var(--space-7) 70px;
  gap: 0 36px;
  background: transparent;
}

.card {
  background: transparent;
  padding: var(--space-6) 0;
  min-height: 0;
  scroll-margin-top: 80px;
  border-top: var(--rule);
  border-radius: var(--radius-square);
  border-left: 2px solid transparent;
  padding-left: 0;
}

.card:target {
  padding-left: 14px;
  border-left-color: var(--bronze);
}

.card .number {
  margin-bottom: 14px;
}

.card h2 {
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.35;
  font-weight: 400;
  margin: 0 0 var(--space-3);
}

.card p {
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-secondary);
  margin: 0 0 18px;
}

.refs {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.refs a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.refs a:hover {
  color: var(--bronze);
}

.foot a:hover,
.footlinks a:hover {
  color: var(--bronze);
}

/* Practices */
.stack {
  padding: var(--space-6) var(--space-7) 70px;
}

.practice {
  display: grid;
  grid-template-columns: 80px 1fr 245px;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  border-top: var(--rule);
  background: transparent;
  border-radius: var(--radius-square);
  scroll-margin-top: 80px;
  border-left: 2px solid transparent;
  padding-left: 0;
}

.practice:target {
  padding-left: 14px;
  border-left-color: var(--bronze);
}

.practice:first-child {
  border-top: 0;
}

.practice .number {
  padding-top: var(--space-1);
}

.practice h2 {
  font-family: var(--serif);
  font-size: 20px;
  line-height: 1.35;
  font-weight: 400;
  margin: 0 0 10px;
}

.practice p {
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink-secondary);
  margin: 0;
}

.method {
  border-left: var(--rule);
  padding-left: 22px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.method strong {
  display: block;
  color: var(--ink);
  font-weight: 600;
  margin-bottom: 6px;
}

.links {
  margin-top: 10px;
}

.links a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

@media (max-width: 900px) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
    padding: var(--space-6) var(--space-6) 50px;
    gap: 0 28px;
  }
}

@media (max-width: 760px) {
  header {
    height: auto;
    min-height: 62px;
    padding: 14px 18px;
    flex-wrap: wrap;
    row-gap: 10px;
  }

  .logo {
    font-size: 15px;
  }

  .nav {
    gap: 14px;
    flex-wrap: wrap;
  }

  .nav a.nav-secondary {
    display: none;
  }

  .hero {
    padding: 34px 20px 28px;
  }

  .hero h1 {
    font-size: 34px;
  }

  .hero p {
    font-size: var(--space-4);
  }

  .intro {
    padding: 22px 20px 0;
  }

  .shell {
    display: block;
  }

  .sidebar {
    border-right: 0;
    border-bottom: var(--rule);
    padding: 22px 20px;
  }

  .sidebar h2 {
    margin-bottom: var(--space-3);
  }

  .works {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
  }

  .work {
    width: auto;
    border: 0;
    border-left: 2px solid transparent;
    padding: 8px 10px;
  }

  .work.active {
    border-left-color: var(--bronze);
  }

  .small {
    margin-top: 14px;
  }

  .content {
    padding: var(--space-5) 20px 54px;
  }

  .toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .toolbar input,
  .toolbar select {
    width: 100%;
  }

  .section h2 {
    font-size: 18px;
  }

  .passage {
    font-size: var(--space-4);
    line-height: 1.75;
    max-width: none;
  }

  .focused {
    padding-left: var(--space-3);
  }

  footer {
    padding: 20px;
    display: block;
  }

  footer span {
    display: block;
    margin-top: 7px;
  }

  .footlinks {
    margin-top: 10px;
  }

  .grid {
    grid-template-columns: 1fr;
    padding: 22px 20px 50px;
    gap: 0;
  }

  .card {
    min-height: 0;
    padding: var(--space-5) 0;
  }

  .note {
    padding: 22px 20px 30px;
  }

  .foot {
    padding: 20px;
  }

  .stack {
    padding: 22px 20px 50px;
  }

  .practice {
    grid-template-columns: 36px 1fr;
    gap: 14px;
  }

  .method {
    grid-column: 2;
    border-left: 0;
    border-top: var(--rule);
    padding: 14px 0 0;
  }
}