:root {
  --reader-sticky-offset: 116px;
}

html {
  scroll-padding-top: var(--reader-sticky-offset);
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  left: 14px;
  top: 10px;
  z-index: 500;
  padding: 11px 16px;
  border-radius: 8px;
  background: #f0eddc;
  color: #07070d;
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-150%);
  transition: transform 160ms ease-out;
}

.skip-link:focus {
  transform: translateY(0);
}

.global-nav .nav-logo,
.nav-menu-trigger {
  min-height: 44px;
}

.global-nav .nav-menu-panel a {
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.global-nav a[aria-current="page"] {
  color: var(--gold);
}

.reading-bar {
  position: sticky;
  top: 65px;
  z-index: 90;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 7, 13, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.reading-bar-inner {
  width: min(100% - 32px, 820px);
  min-height: 50px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(132px, auto) minmax(100px, 1fr) auto auto auto;
  align-items: center;
  gap: 16px;
}

.reading-position {
  min-width: 0;
  overflow: hidden;
  color: #f0eddc;
  font-family: "Nanum Myeongjo", "Noto Serif KR", serif;
  font-size: 12.5px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.reading-meter {
  height: 2px;
  overflow: hidden;
  background: var(--line);
}

.reading-meter > span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--gold);
  transition: width 120ms linear;
}

.reading-percent {
  color: var(--dim);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
}

.resume-reading {
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid rgba(212, 168, 87, 0.35);
  border-radius: 8px;
  background: transparent;
  color: var(--gold);
  font: inherit;
  font-size: 11.5px;
  cursor: pointer;
}

.chapter-jump {
  position: relative;
}

.chapter-jump > summary {
  min-height: 44px;
  padding: 0 14px;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font-size: 12.5px;
  font-weight: 700;
  cursor: pointer;
}

.chapter-jump > summary::-webkit-details-marker,
.chapter-jump > summary::marker {
  display: none;
  content: "";
}

.chapter-jump > summary::after {
  width: 7px;
  height: 7px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  content: "";
  transform: rotate(45deg) translateY(-2px);
  transition: transform 150ms ease-out;
}

.chapter-jump[open] > summary {
  border-color: rgba(212, 168, 87, 0.55);
  color: var(--gold);
}

.chapter-jump[open] > summary::after {
  transform: rotate(225deg) translate(-2px, -1px);
}

.chapter-jump-panel {
  position: absolute;
  top: calc(100% + 9px);
  right: 0;
  width: min(430px, calc(100vw - 32px));
  max-height: min(68vh, 560px);
  overflow: auto;
  padding: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0e0e1a;
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.4);
}

.chapter-jump-panel a {
  min-height: 44px;
  padding: 8px 10px;
  display: flex;
  align-items: center;
  gap: 9px;
  border-radius: 7px;
  color: var(--text);
  font-size: 12.5px;
  line-height: 1.45;
  text-decoration: none;
}

.chapter-jump-panel a:hover,
.chapter-jump-panel a[aria-current="location"] {
  background: rgba(212, 168, 87, 0.1);
  color: var(--gold);
}

.chapter-jump-panel .jump-no {
  flex: 0 0 22px;
  color: var(--gold);
  font-family: "Nanum Myeongjo", serif;
  font-size: 11px;
}

.section,
.note,
#terms {
  scroll-margin-top: var(--reader-sticky-offset);
}

.quick > summary,
.toc a,
.colophon a {
  min-height: 44px;
}

.toc a,
.colophon a {
  display: inline-flex;
  align-items: center;
}

.quick .q-arrow {
  width: 8px;
  height: 8px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 160ms ease-out;
}

.quick[open] .q-arrow {
  transform: rotate(45deg) translate(-2px, -2px);
}

.quick .q-thesis,
.section blockquote,
.note p.lead {
  border-left-width: 1px;
}

.layer-map {
  position: relative;
  gap: 0;
  border-top: 1px solid var(--line);
}

.layer-map .card {
  position: relative;
  min-height: 88px;
  padding: 18px 18px 18px 64px;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
}

.layer-map .card::before {
  position: absolute;
  left: 14px;
  top: 22px;
  width: 30px;
  height: 30px;
  border: 1px solid rgba(212, 168, 87, 0.55);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--gold);
  content: attr(data-layer);
  font-family: "Nanum Myeongjo", serif;
  font-size: 11px;
}

.layer-map .card:not(:last-child)::after {
  position: absolute;
  left: 29px;
  top: 52px;
  bottom: -23px;
  width: 1px;
  background: linear-gradient(var(--gold-soft), transparent);
  content: "";
}

.contrast-notes .card {
  border-left-width: 1px;
}

.trace-model {
  position: relative;
  margin: 34px 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.trace-model::before {
  position: absolute;
  left: 9%;
  right: 9%;
  top: 20px;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), var(--gold-soft), var(--accent-2));
  content: "";
}

.trace-step {
  position: relative;
  padding-top: 44px;
  text-align: center;
}

.trace-step::before {
  position: absolute;
  top: 13px;
  left: 50%;
  width: 15px;
  height: 15px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  background: var(--bg);
  content: "";
  transform: translateX(-50%);
}

.trace-step:last-child::before {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 5px rgba(122, 252, 255, 0.07);
}

.trace-step b {
  display: block;
  margin-bottom: 5px;
  color: #f0eddc;
  font-family: "Nanum Myeongjo", serif;
  font-size: 13.5px;
}

.trace-step span {
  color: var(--dim);
  font-size: 11.5px;
  line-height: 1.6;
}

.epistemic-note {
  padding: 16px 18px;
  border: 1px solid rgba(212, 168, 87, 0.28);
  border-radius: 10px;
  background: rgba(212, 168, 87, 0.04);
  color: var(--dim) !important;
  font-size: 14px !important;
}

.concept-finder,
.notes-finder {
  margin: 28px 0 30px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
}

.concept-finder h3,
.notes-finder h2 {
  margin: 0 0 7px;
  color: #f0eddc;
  font-family: "Nanum Myeongjo", "Noto Serif KR", serif;
  font-size: 16px;
}

.concept-finder p,
.notes-finder p {
  margin: 0 0 14px;
  color: var(--dim);
  font-size: 12.5px;
  line-height: 1.7;
}

.finder-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.finder-row input {
  width: 100%;
  min-height: 46px;
  padding: 10px 13px;
  border: 1px solid #303047;
  border-radius: 8px;
  outline: none;
  background: #0b0b15;
  color: var(--text);
  font: inherit;
  font-size: 14px;
}

.finder-row input::placeholder {
  color: #73738a;
}

.finder-row input:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(212, 168, 87, 0.12);
}

.finder-clear {
  min-width: 62px;
  min-height: 46px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--dim);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.finder-status {
  min-height: 22px;
  margin: 8px 0 0 !important;
}

.term-group-title {
  margin: 26px 0 11px;
  color: var(--gold);
  font-family: "Nanum Myeongjo", serif;
  font-size: 12px;
  letter-spacing: 2px;
}

.advanced-terms {
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

.advanced-terms > summary {
  min-height: 52px;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: #f0eddc;
  font-family: "Nanum Myeongjo", serif;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.advanced-terms > summary::-webkit-details-marker,
.advanced-terms > summary::marker {
  display: none;
  content: "";
}

.advanced-terms > summary span {
  color: var(--dim);
  font-family: "Noto Sans KR", sans-serif;
  font-size: 11px;
  font-weight: 400;
}

.term.is-filtered-out,
.note-index-item.is-filtered-out,
.locked-item.is-filtered-out {
  display: none;
}

.paths-practical {
  grid-template-columns: 1fr;
}

.path.primary-practical {
  border-color: rgba(122, 252, 255, 0.45);
  background: rgba(122, 252, 255, 0.035);
}

.path.primary-practical:hover {
  border-color: var(--accent-2);
  background: rgba(122, 252, 255, 0.065);
}

.path.primary-practical .p-go {
  color: var(--accent-2);
}

.secondary-paths {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 14px;
}

.notes-finder {
  text-align: left;
}

.note-index {
  margin-top: 18px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
}

.note-index-item {
  min-height: 54px;
  padding: 10px 2px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
}

.note-index-item:hover {
  color: var(--gold);
}

.note-index-item b {
  font-family: "Nanum Myeongjo", serif;
  font-size: 13.5px;
}

.note-index-item span {
  margin-top: 2px;
  color: var(--dim);
  font-size: 11px;
}

.note-search-empty {
  margin: 14px 0 0 !important;
  color: var(--dim) !important;
}

.locked-item .li-lock {
  min-width: 38px;
  padding: 3px 6px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--dim);
  font-size: 10px;
  text-align: center;
}

.nav-menu-trigger:focus-visible,
.chapter-jump > summary:focus-visible,
.quick > summary:focus-visible,
.advanced-terms > summary:focus-visible,
.finder-clear:focus-visible,
.resume-reading:focus-visible,
.toc a:focus-visible,
.note-index-item:focus-visible,
.path:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
}

@media (max-width: 720px) {
  :root {
    --reader-sticky-offset: 112px;
  }

  .reading-bar {
    top: 61px;
  }

  .reading-bar-inner {
    width: calc(100% - 24px);
    grid-template-columns: minmax(100px, 1fr) 64px auto;
    gap: 10px;
  }

  .reading-meter {
    display: none;
  }

  .resume-reading {
    display: none;
  }

  .chapter-jump-panel {
    position: fixed;
    top: 118px;
    left: 12px;
    right: 12px;
    width: auto;
    grid-template-columns: 1fr;
  }

  .toc a {
    width: 100%;
    padding-top: 9px;
    padding-bottom: 9px;
  }

  .trace-model {
    grid-template-columns: 1fr;
    gap: 0;
    margin-left: 10px;
  }

  .trace-model::before {
    left: 7px;
    right: auto;
    top: 19px;
    bottom: 19px;
    width: 1px;
    height: auto;
  }

  .trace-step {
    min-height: 76px;
    padding: 13px 0 13px 42px;
    text-align: left;
  }

  .trace-step::before {
    left: 0;
    top: 20px;
    transform: none;
  }

  .secondary-paths,
  .note-index {
    grid-template-columns: 1fr;
  }

  .concept-finder,
  .notes-finder {
    padding: 18px;
  }

  .terms {
    grid-template-columns: 1fr;
  }

  .colophon p:last-child {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0 14px;
  }
}

@media (max-width: 390px) {
  .reading-position {
    font-size: 11.5px;
  }

  .reading-percent {
    font-size: 10.5px;
  }

  .chapter-jump > summary {
    padding: 0 11px;
  }

  .finder-row {
    grid-template-columns: 1fr;
  }

  .finder-clear {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}