:root {
  --bg: #efe6d8;
  --paper: #fffdf8;
  --panel: #fffaf3;
  --panel-strong: #fffefb;
  --line: #dbcdb8;
  --line-strong: #b79b7c;
  --text: #2a221c;
  --muted: #6d5a49;
  --accent: #9f4d2f;
  --accent-deep: #6f2f18;
  --accent-soft: #f5e5d7;
  --sidebar-bg: #2f241d;
  --sidebar-text: #f9f3eb;
  --shadow: 0 20px 44px rgba(73, 45, 22, 0.1);
  --radius-lg: 24px;
  --radius-md: 18px;
  --sidebar-width: 320px;
  --font-body: "Source Sans 3", "Segoe UI", Arial, sans-serif;
  --font-display: "Newsreader", Georgia, serif;
  --base-size: 16px;
  --title-size: clamp(2.3rem, 4vw, 3.6rem);
  --heading-size: clamp(1.8rem, 3vw, 2.35rem);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.8), transparent 26%),
    radial-gradient(circle at 88% 12%, rgba(207, 143, 98, 0.12), transparent 24%),
    linear-gradient(180deg, #f8f1e7 0%, var(--bg) 100%);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--base-size);
  line-height: 1.7;
}

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

.site-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  gap: 28px;
  width: min(1440px, calc(100% - 32px));
  margin: 16px auto 28px;
}

.sidebar {
  position: sticky;
  top: 16px;
  align-self: start;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 18px;
  max-height: calc(100vh - 32px);
  padding: 24px 18px;
  border: 1px solid rgba(255, 245, 231, 0.08);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(63, 48, 38, 0.98), rgba(39, 30, 24, 0.98)),
    var(--sidebar-bg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.sidebar-head {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.sidebar-label,
.section-label,
.entry-number,
.entry-block h3 {
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-size: 0.94rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.04em;
}

.sidebar h1,
.intro-card h2,
.entry-card h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.sidebar h1 {
  font-size: var(--title-size);
  line-height: 1.02;
  color: var(--sidebar-text);
}

.sidebar-copy {
  margin: 12px 0 0;
  font-size: 1rem;
  color: rgba(249, 243, 235, 0.78);
}

.sidebar-label {
  color: rgba(249, 243, 235, 0.72);
}

.side-nav {
  display: grid;
  gap: 8px;
  min-height: 0;
  max-height: 100%;
  overflow: auto;
  padding-right: 4px;
  overscroll-behavior: contain;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.side-nav::-webkit-scrollbar {
  display: none;
}

.nav-link {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 10px 12px;
  border: 1px solid rgba(255, 245, 231, 0.08);
  border-radius: 14px;
  color: rgba(249, 243, 235, 0.82);
  text-decoration: none;
  font-size: 0.98rem;
  line-height: 1.45;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  background: rgba(255, 245, 231, 0.08);
  border-color: rgba(255, 245, 231, 0.18);
}

.nav-link.active {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  border-color: transparent;
  color: #fffdf8;
}

.content {
  min-width: 0;
  padding-bottom: 32px;
  padding-right: 28px;
}

.mobile-nav-toggle {
  display: none;
  position: sticky;
  top: 12px;
  z-index: 20;
  margin-bottom: 16px;
  padding: 12px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.96);
  color: var(--text);
  font: inherit;
  box-shadow: var(--shadow);
}

.intro-card,
.list-card,
.entry-card {
  margin-bottom: 18px;
  padding: 26px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 249, 240, 0.96)),
    linear-gradient(180deg, var(--panel-strong), var(--panel));
  box-shadow: var(--shadow);
  scroll-margin-top: 20px;
}

.list-card {
  display: none;
}

.intro-card h2 {
  margin-bottom: 14px;
  font-size: var(--title-size);
  line-height: 1.08;
  max-width: none;
  white-space: nowrap;
}

.intro-card p,
.entry-card p,
.entry-card li,
.list-card li,
blockquote {
  margin: 0 0 12px;
  font-size: 1rem;
  line-height: 1.4;
}

.section-label {
  color: var(--accent);
}

.content-list {
  columns: 2;
  column-gap: 32px;
  margin: 0;
  padding-left: 20px;
}

.inkwell-orbit {
  display: grid;
  justify-items: center;
  margin: 8px 0 20px;
  padding: 0;
}

.orbit-stage {
  position: relative;
  width: min(720px, calc(100vw - 470px));
  height: 356px;
  margin-top: -6px;
  overflow: hidden;
  isolation: isolate;
  --orbit-center-y: 196px;
  --orbit-scale: 0.92;
}

.orbit-glow,
.orbit-ring,
.orbit-core,
.orbit-rotator {
  position: absolute;
  left: 50%;
  top: var(--orbit-center-y);
  transform: translate(-50%, -50%) scale(var(--orbit-scale));
  transform-origin: center;
}

.orbit-glow {
  border-radius: 999px;
  filter: blur(22px);
}

.orbit-glow-one {
  width: 180px;
  height: 180px;
  background: rgba(159, 77, 47, 0.12);
}

.orbit-glow-two {
  width: 280px;
  height: 280px;
  background: rgba(111, 47, 24, 0.05);
}

.orbit-ring {
  border-radius: 50%;
  border: 1px solid rgba(111, 47, 24, 0.1);
}

.orbit-ring-one {
  width: 150px;
  height: 150px;
}

.orbit-ring-two {
  width: 250px;
  height: 250px;
}

.orbit-ring-three {
  width: 370px;
  height: 370px;
}

.orbit-core {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 118px;
  height: 118px;
  border: 1px solid rgba(111, 47, 24, 0.14);
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 26%, rgba(255, 255, 255, 0.92), rgba(252, 239, 226, 0.78)),
    linear-gradient(180deg, rgba(255, 250, 245, 0.98), rgba(248, 234, 220, 0.94));
  box-shadow:
    inset 0 12px 18px rgba(255, 255, 255, 0.34),
    0 12px 28px rgba(88, 58, 33, 0.1);
  text-align: center;
  z-index: 4;
}

.orbit-core-count {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 600;
  line-height: 1;
  color: var(--accent-deep);
  margin-top: -4px;
}

.orbit-core-label {
  display: block;
  max-width: 9ch;
  margin-top: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--muted);
}

.orbit-rotator {
  width: 100%;
  height: 100%;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}

.orbit-rotator-outer {
  animation-name: orbit-spin;
  animation-duration: 34s;
}

.orbit-rotator-middle {
  animation-name: orbit-spin-reverse;
  animation-duration: 26s;
}

.orbit-rotator-inner {
  animation-name: orbit-spin;
  animation-duration: 18s;
}

.orbit-node {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(calc(-50% + var(--x)), calc(-50% + var(--y)));
  z-index: 2;
  text-decoration: none;
  transition: transform 180ms ease;
}

.orbit-node-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid rgba(111, 47, 24, 0.12);
  border-radius: 999px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(251, 241, 230, 0.92));
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.15;
  white-space: nowrap;
  box-shadow:
    0 8px 18px rgba(88, 58, 33, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  animation: orbit-counter-spin 34s linear infinite;
}

.orbit-rotator-middle .orbit-node-label {
  animation-name: orbit-counter-spin-reverse;
  animation-duration: 26s;
}

.orbit-rotator-inner .orbit-node-label {
  animation-name: orbit-counter-spin;
  animation-duration: 18s;
}

.orbit-node-label strong {
  color: var(--accent);
  font-weight: 700;
}

.orbit-stage:hover .orbit-node {
  opacity: 0.82;
}

.orbit-stage .orbit-node:hover {
  opacity: 1;
  transform: translate(calc(-50% + var(--x)), calc(-50% + var(--y))) scale(1.08);
  z-index: 6;
}

.orbit-stage .orbit-node:hover .orbit-node-label {
  box-shadow:
    0 14px 28px rgba(88, 58, 33, 0.14),
    inset 0 1px 0 rgba(255, 255, 255, 0.92);
  border-color: rgba(159, 77, 47, 0.22);
  color: var(--text);
}

.entry-number {
  color: var(--accent);
}

.entry-card h2 {
  margin-bottom: 14px;
  font-size: var(--heading-size);
  line-height: 1.12;
}

.entry-block + .entry-block {
  margin-top: 18px;
}

.entry-block {
  position: relative;
  padding: 14px 16px;
  border-radius: 16px;
}

.entry-block h3 {
  margin-bottom: 8px;
  color: var(--muted);
}

.entry-block p,
.entry-block li {
  line-height: 1;
  margin-bottom: 6px;
}

.entry-block ul,
.entry-block ol {
  margin-top: 0;
  margin-bottom: 0;
}

.entry-card ul {
  margin: 0;
  padding-left: 22px;
}

.block-definition {
  border: 1px solid rgba(183, 155, 124, 0.34);
  background: linear-gradient(180deg, rgba(255, 250, 243, 0.96), rgba(248, 238, 226, 0.82));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.75);
}

.block-definition h3 {
  color: var(--accent-deep);
}

.block-notes {
  border-left: 4px solid rgba(159, 77, 47, 0.72);
  background: linear-gradient(180deg, rgba(250, 241, 232, 0.92), rgba(255, 250, 244, 0.88));
}

.block-notes h3 {
  color: var(--accent);
}

.block-importance {
  border: 1px dashed rgba(159, 77, 47, 0.44);
  background: radial-gradient(circle at top right, rgba(159, 77, 47, 0.08), transparent 38%), rgba(255, 252, 247, 0.94);
}

.block-importance h3 {
  color: var(--accent-deep);
}

.block-connections {
  border: 1px solid rgba(109, 90, 73, 0.16);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(246, 239, 230, 0.84));
}

.block-connections h3 {
  color: #7d563f;
  letter-spacing: 0.06em;
}

.block-reference {
  padding: 12px 16px 2px;
  border-top: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
}

.block-reference h3 {
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.block-quote {
  border: 1px solid rgba(183, 155, 124, 0.26);
  background: linear-gradient(180deg, rgba(252, 244, 235, 0.98), rgba(247, 234, 222, 0.88));
}

.block-quote h3 {
  color: var(--accent);
}

.block-visual {
  padding-inline: 8px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0));
}

.entry-card:nth-of-type(3n + 1) .block-definition {
  background: linear-gradient(180deg, rgba(255, 248, 238, 0.96), rgba(248, 236, 224, 0.82));
}

.entry-card:nth-of-type(3n + 2) .block-notes {
  background: linear-gradient(180deg, rgba(244, 236, 228, 0.92), rgba(255, 250, 244, 0.9));
}

.entry-card:nth-of-type(3n) .block-importance {
  background: radial-gradient(circle at top left, rgba(159, 77, 47, 0.1), transparent 36%), rgba(255, 251, 246, 0.95);
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
}

.reference-block {
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.entry-figure {
  display: block;
  width: min(100%, 560px);
  margin: 6px auto 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}

.entry-figure-wrap {
  margin-bottom: 0;
  text-align: center;
}

.entry-figure-caption {
  display: block;
  margin-top: 10px;
  font-size: 0.94rem;
  line-height: 1.35;
  color: var(--muted);
}

blockquote {
  margin: 16px 0 0;
  padding: 16px 18px;
  border-left: 4px solid var(--accent);
  border-radius: 12px;
  background: linear-gradient(180deg, #fcf1e6, #f9e9db);
}

body.js-enabled .entry-card,
body.js-enabled .intro-card,
body.js-enabled .list-card {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 500ms ease,
    transform 500ms ease;
}

body.js-enabled .is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes orbit-spin {
  from {
    transform: translate(-50%, -50%) scale(var(--orbit-scale)) rotate(0deg);
  }
  to {
    transform: translate(-50%, -50%) scale(var(--orbit-scale)) rotate(360deg);
  }
}

@keyframes orbit-spin-reverse {
  from {
    transform: translate(-50%, -50%) scale(var(--orbit-scale)) rotate(360deg);
  }
  to {
    transform: translate(-50%, -50%) scale(var(--orbit-scale)) rotate(0deg);
  }
}

@keyframes orbit-counter-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(-360deg);
  }
}

@keyframes orbit-counter-spin-reverse {
  from {
    transform: rotate(-360deg);
  }
  to {
    transform: rotate(0deg);
  }
}

@media (max-width: 1080px) {
  .site-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    inset: 16px 16px auto 16px;
    max-height: calc(100vh - 32px);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition:
      transform 180ms ease,
      opacity 180ms ease;
    z-index: 40;
  }

  .sidebar.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .orbit-stage {
    width: min(100%, 540px);
    height: 308px;
    margin-top: -2px;
    --orbit-center-y: 176px;
    --orbit-scale: 0.82;
  }

  .orbit-ring-three {
    width: 320px;
    height: 320px;
  }

  .mobile-nav-toggle {
    display: inline-flex;
    align-items: center;
  }
}

@media (max-width: 760px) {
  .site-shell {
    width: min(100% - 16px, 1440px);
    margin: 8px auto 20px;
  }

  .content {
    padding-right: 0;
  }

  .intro-card,
  .list-card,
  .entry-card {
    padding: 20px 18px;
  }

  .orbit-stage {
    width: 100%;
    height: 264px;
    margin-top: 0;
    --orbit-center-y: 154px;
    --orbit-scale: 0.7;
  }

  .orbit-ring-one {
    width: 120px;
    height: 120px;
  }

  .orbit-ring-two {
    width: 200px;
    height: 200px;
  }

  .orbit-ring-three {
    width: 270px;
    height: 270px;
  }

  .orbit-core {
    width: 96px;
    height: 96px;
  }

  .orbit-core-count {
    font-size: 2rem;
  }

  .orbit-node-label {
    max-width: 130px;
    font-size: 0.76rem;
    white-space: normal;
  }

  .intro-card h2 {
    font-size: 2rem;
    white-space: normal;
  }

  .entry-card h2 {
    font-size: 1.7rem;
  }

  .content-list {
    columns: 1;
  }
}