/* WebNav Hub — Editorial Index. Palette: warm paper / ink / vermillion. */
:root {
  --paper: #f6f3ec;
  --paper-2: #efebe1;
  --paper-3: #e7e2d4;
  --ink: #181816;
  --ink-2: #4a4842;
  --ink-3: #8a877c;
  --vermillion: #c2410c;
  --vermillion-2: #9a3408;
  --rule: rgba(24, 24, 22, 0.14);
  --rule-strong: rgba(24, 24, 22, 0.24);
  --tint: rgba(194, 65, 12, 0.06);
  --serif: "Fraunces", "Cormorant Garamond", Georgia, "Songti SC", serif;
  --sans:
    "Space Grotesk", "PingFang SC", "Microsoft YaHei", "Helvetica Neue",
    sans-serif;
  --mono: "Space Mono", "SFMono-Regular", Menlo, monospace;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --maxw: 1280px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #15140f;
    --paper-2: #1c1a14;
    --paper-3: #26231a;
    --ink: #f0ece0;
    --ink-2: #b8b3a4;
    --ink-3: #807a6a;
    --vermillion: #e8643a;
    --vermillion-2: #ff7a4d;
    --rule: rgba(240, 236, 224, 0.14);
    --rule-strong: rgba(240, 236, 224, 0.26);
    --tint: rgba(232, 100, 58, 0.1);
  }
}
* {
  box-sizing: border-box;
}
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  padding: 0;
  background-color: var(--paper);
  background-image:
    radial-gradient(
      1100px 540px at 18% -8%,
      var(--tint),
      transparent 60%
    ),
    radial-gradient(
      900px 600px at 95% 0%,
      rgba(194, 65, 12, 0.04),
      transparent 55%
    );
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.95rem;
  line-height: 1.55;
  letter-spacing: -0.005em;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.5;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
@media (prefers-color-scheme: dark) {
  body::after {
    mix-blend-mode: screen;
    opacity: 0.06;
  }
}

/* masthead */
.masthead {
  position: relative;
  z-index: 2;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3.2rem 2rem 2.4rem;
}
.masthead .top-rule {
  height: 3px;
  background: var(--ink);
  margin-bottom: 1.1rem;
}
.masthead .meta-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin-bottom: 1.8rem;
}
.masthead .meta-row .dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--vermillion);
  margin-right: 0.5em;
  vertical-align: middle;
  animation: pulse 2.4s var(--ease-soft) infinite;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.45;
    transform: scale(0.85);
  }
}
.masthead h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-optical-sizing: auto;
  font-size: clamp(2.8rem, 7vw, 5.2rem);
  line-height: 0.96;
  letter-spacing: -0.035em;
  margin: 0 0 0.9rem;
  color: var(--ink);
  font-variation-settings: "opsz" 120;
}
.masthead h1 em {
  font-style: italic;
  font-weight: 400;
  color: var(--vermillion);
  font-variation-settings: "opsz" 144;
}
.masthead .dek {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-optical-sizing: auto;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.45;
  color: var(--ink-2);
  max-width: 56ch;
  margin: 0 0 2rem;
  font-variation-settings: "opsz" 24;
}
.masthead .search {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  max-width: 520px;
  padding: 0.7rem 0.95rem;
  background: var(--paper-2);
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  transition:
    border-color 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}
.masthead .search:focus-within {
  border-color: var(--vermillion);
  box-shadow: 0 0 0 3px var(--tint);
}
.masthead .search i {
  color: var(--ink-3);
  font-size: 0.85rem;
}
.masthead .search input {
  flex: 1;
  border: none;
  background: transparent;
  outline: none;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.95rem;
  letter-spacing: -0.005em;
  min-width: 0;
}
.masthead .search input::placeholder {
  color: var(--ink-3);
}
.masthead .search .kbd {
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  color: var(--ink-3);
  background: var(--paper);
}
.masthead .status {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  margin: 0.7rem 0 0;
  min-height: 1em;
}

/* toc */
.toc {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.toc .progress {
  position: absolute;
  left: 0;
  top: 0;
  height: 2px;
  background: var(--vermillion);
  width: 0;
  transition: width 0.1s linear;
}
.toc ol {
  list-style: none;
  margin: 0 auto;
  padding: 0.55rem 2rem;
  max-width: var(--maxw);
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 0.1rem;
  counter-reset: toc;
}
.toc li {
  counter-increment: toc;
}
.toc a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.4rem 0.7rem;
  text-decoration: none;
  color: var(--ink-2);
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  border-radius: 2px;
  transition:
    color 0.18s var(--ease),
    background-color 0.18s var(--ease);
}
.toc a .num {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  transition: color 0.18s var(--ease);
}
.toc a:hover {
  color: var(--ink);
  background: var(--tint);
}
.toc a:hover .num,
.toc a.active,
.toc a.active .num {
  color: var(--vermillion);
}

/* main + section heads */
main {
  position: relative;
  z-index: 2;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 2rem 4rem;
  counter-reset: sec;
}
main > section {
  counter-increment: sec;
  border-top: 1px solid var(--rule);
  padding: 2.6rem 0 1.4rem;
}
main > section:first-child {
  border-top: none;
  padding-top: 1.4rem;
}
.section-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 1rem 1.4rem;
  margin-bottom: 1.6rem;
  opacity: 0;
  transform: translateY(10px);
}
.section-head.is-visible {
  opacity: 1;
  transform: none;
  transition:
    opacity 0.6s var(--ease),
    transform 0.6s var(--ease);
}
.section-head .num {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-optical-sizing: auto;
  font-size: 1.1rem;
  color: var(--vermillion);
  white-space: nowrap;
}
.section-head .num::before {
  content: "№";
  font-style: italic;
  margin-right: 0.15em;
  opacity: 0.55;
}
.section-head .num::after {
  content: counter(sec, decimal-leading-zero);
  font-variation-settings: "opsz" 36;
}
.section-head .category-title {
  font-family: var(--serif);
  font-weight: 500;
  font-optical-sizing: auto;
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0;
  color: var(--ink);
  font-variation-settings: "opsz" 60;
}
.section-head .count {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  white-space: nowrap;
  align-self: end;
  padding-bottom: 0.35rem;
}
.section-head .count strong {
  color: var(--ink);
  font-weight: 600;
  margin-right: 0.25em;
}

/* link grid + cards */
.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}
.link-card {
  --i: 0;
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 0.85rem;
  row-gap: 0.1rem;
  align-items: center;
  padding: 0.95rem 1rem;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: transparent;
  cursor: pointer;
  contain: layout style paint;
  opacity: 0;
  transform: translateY(8px);
}
.link-card.is-visible {
  opacity: 1;
  transform: none;
  transition:
    opacity 0.5s var(--ease) calc(var(--i) * 22ms),
    transform 0.5s var(--ease) calc(var(--i) * 22ms),
    background-color 0.25s var(--ease);
}
.link-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--vermillion);
  transform: scaleY(0);
  transform-origin: center;
  transition: transform 0.3s var(--ease);
}
.link-card:hover {
  background: var(--paper-2);
}
.link-card:hover::before,
.link-card:focus-within::before {
  transform: scaleY(1);
}
.link-card a {
  position: absolute;
  inset: 0;
  text-decoration: none;
  z-index: 4;
  display: block;
}
.link-card a:focus-visible {
  outline: 2px solid var(--vermillion);
  outline-offset: -2px;
}
.link-card i {
  grid-row: 1 / span 2;
  grid-column: 1;
  font-size: 1.1rem;
  color: var(--ink-2);
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: var(--paper);
  transition:
    color 0.25s var(--ease),
    border-color 0.25s var(--ease),
    background-color 0.25s var(--ease);
  position: relative;
  z-index: 2;
}
.link-card:hover i {
  color: var(--vermillion);
  border-color: var(--vermillion);
  background: var(--paper-2);
}
.link-card h3 {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.012em;
  line-height: 1.25;
  margin: 0;
  color: var(--ink);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  position: relative;
  z-index: 2;
}
.link-card .domain {
  grid-column: 2;
  grid-row: 2;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--ink-3);
  letter-spacing: 0.01em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  position: relative;
  z-index: 2;
  transition: color 0.25s var(--ease);
}
.link-card:hover .domain {
  color: var(--ink-2);
}
.link-card.is-hidden {
  display: none;
}
.empty-msg {
  display: none;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--ink-3);
  padding: 1.4rem 0 0.6rem;
  border-bottom: 1px solid var(--rule);
}
.link-grid[data-empty="true"] ~ .empty-msg {
  display: block;
}

/* colophon */
.colophon {
  position: relative;
  z-index: 2;
  border-top: 3px solid var(--ink);
  background: var(--paper-2);
  margin-top: 2rem;
}
.colophon-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.2rem 2rem;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 1.4rem;
}
.colophon .mark {
  font-family: var(--serif);
  font-weight: 500;
  font-optical-sizing: auto;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  font-variation-settings: "opsz" 36;
}
.colophon .mark em {
  font-style: italic;
  font-weight: 400;
  color: var(--vermillion);
}
.colophon .copy {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  margin: 0;
  text-align: right;
}
.colophon nav {
  grid-column: 1 / -1;
  display: flex;
  gap: 1.4rem;
  justify-content: flex-start;
  border-top: 1px solid var(--rule);
  padding-top: 1.1rem;
  margin-top: 0.4rem;
}
.colophon nav a {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-2);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}
.colophon nav a:hover {
  color: var(--vermillion);
}

/* responsive */
@media (max-width: 900px) {
  .masthead {
    padding: 2.4rem 1.4rem 1.8rem;
  }
  main {
    padding: 0 1.4rem 3rem;
  }
  .toc ol {
    padding: 0.5rem 1.4rem;
  }
  .colophon-inner {
    padding: 1.8rem 1.4rem;
  }
  .link-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}
@media (max-width: 640px) {
  html {
    font-size: 15px;
  }
  .masthead {
    padding: 2rem 1rem 1.4rem;
  }
  .masthead .meta-row {
    font-size: 0.66rem;
  }
  main {
    padding: 0 1rem 2.4rem;
  }
  .toc ol {
    padding: 0.45rem 1rem;
    gap: 0;
  }
  .toc a {
    padding: 0.35rem 0.55rem;
    font-size: 0.78rem;
  }
  .link-grid {
    grid-template-columns: 1fr;
  }
  .section-head {
    grid-template-columns: auto 1fr;
    gap: 0.6rem 1rem;
  }
  .section-head .count {
    grid-column: 2;
    grid-row: 2;
    padding-bottom: 0;
  }
  .colophon-inner {
    grid-template-columns: 1fr;
    padding: 1.6rem 1rem;
  }
  .colophon .copy {
    text-align: left;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .link-card,
  .section-head {
    opacity: 1;
    transform: none;
  }
}