.edge-drawer {
  --drawer-bg: rgba(13, 13, 13, 0.98);
  --drawer-line: #303030;
  --drawer-text: #f2f2f2;
  --drawer-muted: #858585;
  --drawer-peek: 38px;
  position: fixed;
  z-index: 80;
  top: 0;
  left: 0;
  width: 19vw;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  border-right: 1px solid var(--drawer-line);
  background: var(--drawer-bg);
  color: var(--drawer-text);
  transform: translateX(calc(-100% + var(--drawer-peek)));
  box-shadow: 16px 0 38px rgba(0, 0, 0, 0);
  transition:
    transform 0.22s ease,
    box-shadow 0.22s ease;
  backdrop-filter: blur(16px);
}

.edge-drawer.open {
  transform: translateX(0);
  box-shadow: 16px 0 38px rgba(0, 0, 0, 0.2);
}

.edge-drawer-content {
  height: 100%;
  overflow-y: auto;
  padding: clamp(86px, 12vh, 126px) 54px 38px 22px;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.edge-drawer-handle {
  position: absolute;
  z-index: 2;
  top: 0;
  right: 0;
  width: var(--drawer-peek);
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding-top: 0;
  border: 0;
  border-left: 1px solid var(--drawer-line);
  background: transparent;
  color: var(--drawer-text);
  cursor: pointer;
}

.edge-drawer-handle strong {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0;
}

.edge-drawer-handle span {
  color: var(--drawer-muted);
  font-size: 9px;
  letter-spacing: 1.5px;
}

.edge-drawer-switch {
  flex: 0 0 auto;
}

.edge-drawer-heading {
  margin-bottom: 34px;
}

.edge-drawer-heading p {
  margin: 0 0 9px;
  color: var(--drawer-muted);
  font-size: 10px;
  letter-spacing: 1.6px;
}

.edge-drawer-heading h2 {
  margin: 0 0 13px;
  color: var(--drawer-text);
  font-size: 25px;
  line-height: 1.15;
}

.edge-drawer-heading > span {
  display: block;
  color: var(--drawer-muted);
  font-size: 12px;
  line-height: 1.75;
}

.edge-route {
  position: relative;
  display: grid;
}

.edge-route::before {
  content: "";
  position: absolute;
  top: 9px;
  bottom: 26px;
  left: 6px;
  width: 1px;
  background: var(--drawer-line);
}

.edge-route a {
  position: relative;
  display: grid;
  gap: 5px;
  min-height: 92px;
  padding: 0 0 24px 30px;
  color: var(--drawer-text);
  text-decoration: none;
}

.edge-route a::before {
  content: "";
  position: absolute;
  top: 5px;
  left: 0;
  width: 11px;
  height: 11px;
  border: 1px solid var(--drawer-muted);
  background: var(--drawer-bg);
  border-radius: 50%;
}

.edge-route a:hover::before,
.edge-route a.active::before {
  border-color: var(--drawer-text);
  background: var(--drawer-text);
}

.edge-route a > span {
  color: var(--drawer-muted);
  font-size: 9px;
  letter-spacing: 1px;
}

.edge-route a strong {
  font-size: 15px;
  font-weight: 600;
}

.edge-route a small {
  color: var(--drawer-muted);
  font-size: 12px;
  line-height: 1.6;
}

body.visitor-browse-mode .edge-drawer,
.reading-route-drawer {
  --drawer-bg: #fff;
  --drawer-line: rgba(38, 48, 42, 0.12);
  --drawer-text: #18201b;
  --drawer-muted: #667068;
}

.reading-route-drawer {
  background: var(--drawer-bg);
}

.reading-route-drawer .edge-route a {
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  backdrop-filter: none;
}

.edge-drawer-close-hint {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: -13px 0 28px;
  border: 0;
  background: transparent;
  color: var(--drawer-muted);
  font-size: 10px;
  letter-spacing: 0.08em;
  padding: 0;
  cursor: pointer;
}

.edge-drawer-close-hint::before {
  content: "";
  display: block;
  width: 22px;
  height: 1px;
  background: var(--drawer-muted);
}

.edge-drawer-close-hint:hover,
.edge-drawer-close-hint:focus-visible {
  color: var(--drawer-text);
  outline: none;
}

.edge-drawer-close-hint:hover::before,
.edge-drawer-close-hint:focus-visible::before {
  width: 30px;
  background: var(--drawer-text);
}

.reading-route-drawer .edge-drawer-switch {
  display: grid;
  place-items: center;
  position: relative;
  width: 18px;
  height: 26px;
  margin: 15px 0 0;
}

.reading-route-drawer .edge-drawer-switch::before,
.reading-route-drawer .edge-drawer-switch::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  display: block;
  transition:
    opacity 0.22s ease,
    transform 0.22s ease;
}

.reading-route-drawer .edge-drawer-switch::before {
  width: 9px;
  height: 9px;
  border: 1.5px solid var(--drawer-muted);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(1);
}

.reading-route-drawer .edge-drawer-switch::after {
  width: 1.5px;
  height: 22px;
  border-radius: 0;
  background: var(--drawer-muted);
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(0.45);
}

.section-nav .edge-drawer-switch {
  display: grid;
  place-items: center;
  position: relative;
  width: 18px;
  height: 26px;
  margin: 11px 0 0;
}

.section-nav .edge-drawer-switch::before,
.section-nav .edge-drawer-switch::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  display: block;
  transition:
    opacity 0.22s ease,
    transform 0.22s ease;
}

.section-nav .edge-drawer-switch::before {
  width: 9px;
  height: 9px;
  border: 1.5px solid var(--drawer-muted);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(1);
}

.section-nav .edge-drawer-switch::after {
  width: 1.5px;
  height: 22px;
  background: var(--drawer-muted);
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(0.45);
}

.section-nav.open .edge-drawer-switch::before {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.45);
}

.section-nav.open .edge-drawer-switch::after {
  opacity: 1;
  transform: translate(-50%, -50%) scaleY(1);
}

.reading-route-drawer.open .edge-drawer-switch::before {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.45);
}

.reading-route-drawer.open .edge-drawer-switch::after {
  opacity: 1;
  transform: translate(-50%, -50%) scaleY(1);
}

@media (hover: hover) and (pointer: fine) {
  .section-nav:hover .edge-drawer-switch::before,
  .reading-route-drawer:hover .edge-drawer-switch::before {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.45);
  }

  .section-nav:hover .edge-drawer-switch::after,
  .reading-route-drawer:hover .edge-drawer-switch::after {
    opacity: 1;
    transform: translate(-50%, -50%) scaleY(1);
  }
}

@media (max-width: 640px) {
  .edge-drawer {
    --drawer-peek: 44px;
    width: min(88vw, 336px);
    touch-action: pan-y;
  }

  .edge-drawer-content {
    padding: 76px 50px max(28px, env(safe-area-inset-bottom)) 18px;
  }

  .edge-drawer-handle {
    width: var(--drawer-peek);
    box-sizing: border-box;
    justify-content: center;
    padding-top: 0;
    touch-action: none;
  }

  .edge-drawer-handle strong {
    display: flex;
    color: var(--drawer-muted);
    font-size: 11px;
    letter-spacing: 0;
  }

  .edge-drawer-handle span {
    display: block;
    font-size: 8px;
    letter-spacing: 1px;
  }

  .edge-drawer-switch {
    display: grid;
    place-items: center;
    position: relative;
    width: 18px;
    height: 26px;
    margin: 12px 0 0;
  }

  .edge-drawer-switch::before,
  .edge-drawer-switch::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    display: block;
    transition:
      opacity 0.22s ease,
      transform 0.22s ease;
  }

  .edge-drawer-switch::before {
    width: 8px;
    height: 8px;
    border: 1px solid var(--drawer-muted);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(1);
  }

  .edge-drawer-switch::after {
    width: 2px;
    height: 18px;
    border-radius: 0;
    background: var(--drawer-muted);
    opacity: 0;
    transform: translate(-50%, -50%) scaleY(0.45);
  }

  .edge-drawer.open .edge-drawer-switch::before {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.45);
  }

  .edge-drawer.open .edge-drawer-switch::after {
    opacity: 1;
    transform: translate(-50%, -50%) scaleY(1);
  }

  .edge-route a {
    min-height: 84px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .edge-drawer {
    transition: none;
  }
}