@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700&family=Space+Grotesk:wght@500;600&display=swap');

:root {
  color-scheme: light;
  --bg: #eef1f4;
  --canvas: #f5f6f7;
  --panel: rgba(255, 255, 255, .9);
  --panel-solid: #fff;
  --panel-strong: #f7f8f9;
  --text: #14181d;
  --muted: #68717c;
  --muted-2: #929aa3;
  --border: rgba(17, 28, 38, .12);
  --border-strong: rgba(17, 28, 38, .22);
  --accent: #087c84;
  --accent-bright: #00a4ac;
  --accent-soft: rgba(8, 124, 132, .11);
  --accent-ink: #fff;
  --grid: rgba(25, 43, 54, .045);
  --shadow: 0 16px 48px rgba(17, 28, 38, .12);
  --shadow-soft: 0 8px 24px rgba(17, 28, 38, .08);
  --topbar-h: 78px;
  --radius: 10px;
}

body.dark {
  color-scheme: dark;
  --bg: #070a0f;
  --canvas: #070a0f;
  --panel: rgba(12, 17, 23, .9);
  --panel-solid: #0d1219;
  --panel-strong: #111821;
  --text: #eef2f5;
  --muted: #93a0ad;
  --muted-2: #63707d;
  --border: rgba(181, 207, 217, .12);
  --border-strong: rgba(181, 207, 217, .22);
  --accent: #2cc6c9;
  --accent-bright: #6be1dc;
  --accent-soft: rgba(44, 198, 201, .12);
  --accent-ink: #041315;
  --grid: rgba(174, 214, 220, .035);
  --shadow: 0 22px 60px rgba(0, 0, 0, .48);
  --shadow-soft: 0 8px 30px rgba(0, 0, 0, .3);
}

* { box-sizing: border-box; }

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

html { overflow: hidden; background: var(--bg); }

body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  color: var(--text);
  background: var(--bg);
  font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

button, input, select { font: inherit; }
button, select { color: inherit; }
button { -webkit-tap-highlight-color: transparent; }

::selection { color: var(--text); background: rgba(44, 198, 201, .28); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 9px 13px;
  color: var(--accent-ink);
  background: var(--accent);
  border-radius: 6px;
  transform: translateY(-160%);
  transition: transform .15s ease;
}
.skip-link:focus { transform: translateY(0); }

/* ---------- Header ---------- */
#topbar {
  position: relative;
  z-index: 30;
  min-height: var(--topbar-h);
  display: grid;
  grid-template-columns: minmax(270px, 1.25fr) minmax(230px, .9fr) auto auto;
  align-items: center;
  gap: 22px;
  padding: 12px 20px 12px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 rgba(255,255,255,.025);
  backdrop-filter: blur(18px) saturate(120%);
}

#topbar::before {
  content: "";
  position: absolute;
  inset: auto auto -1px 24px;
  width: 82px;
  height: 1px;
  background: var(--accent);
  box-shadow: 0 0 14px var(--accent);
}

#title-block { min-width: 0; }
.eyebrow {
  display: block;
  margin-bottom: 3px;
  color: var(--accent);
  font: 600 9px/1.1 "Space Grotesk", sans-serif;
  letter-spacing: .16em;
}
#title {
  margin: 0;
  font-size: clamp(16px, 1.35vw, 21px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: .025em;
}
#subtitle {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .035em;
}

#search-wrap {
  position: relative;
  width: 100%;
  max-width: 470px;
  justify-self: center;
}
.search-icon {
  position: absolute;
  top: 50%;
  left: 13px;
  width: 13px;
  height: 13px;
  border: 1.5px solid var(--muted);
  border-radius: 50%;
  transform: translateY(-56%);
  pointer-events: none;
}
.search-icon::after {
  content: "";
  position: absolute;
  right: -5px;
  bottom: -3px;
  width: 6px;
  height: 1.5px;
  background: var(--muted);
  transform: rotate(45deg);
  transform-origin: left;
}
#search {
  width: 100%;
  height: 40px;
  padding: 0 42px 0 38px;
  color: var(--text);
  caret-color: var(--accent);
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
}
#search::placeholder { color: var(--muted-2); }
#search:hover { border-color: var(--border-strong); }
#search:focus {
  background: var(--panel-solid);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), 0 0 24px rgba(44,198,201,.06);
}
.search-shortcut {
  position: absolute;
  top: 50%;
  right: 10px;
  min-width: 22px;
  padding: 2px 6px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  font: 500 11px/1.3 "Space Grotesk", sans-serif;
  text-align: center;
  transform: translateY(-50%);
}

.info-panel { background: transparent; }
#stats {
  display: flex;
  align-items: center;
  gap: 0;
  white-space: nowrap;
}
.stat {
  position: relative;
  min-width: 62px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding: 0 14px;
}
.stat:first-child { padding-left: 0; }
.stat:last-child { padding-right: 0; }
.stat + .stat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 1px;
  height: 28px;
  background: var(--border);
}
.stat-num {
  color: var(--text);
  font: 600 17px/1.15 "Space Grotesk", "Noto Sans SC", sans-serif;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.025em;
}
.stat-label {
  margin-top: 3px;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: .12em;
}

.icon-button {
  width: 40px;
  height: 40px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: color .15s, border-color .15s, background .15s;
}
.icon-button:hover { color: var(--accent); background: var(--accent-soft); border-color: var(--accent); }
.theme-label { display: none; }
.theme-icon {
  position: relative;
  width: 15px;
  height: 15px;
  border: 1.5px solid currentColor;
  border-radius: 50%;
}
body.dark .theme-icon { border-radius: 50%; box-shadow: inset -5px -3px 0 0 var(--panel); }
body:not(.dark) .theme-icon::after {
  content: "";
  position: absolute;
  inset: -5px;
  border: 1px dotted currentColor;
  border-radius: 50%;
}

/* ---------- Control deck ---------- */
.control-deck {
  position: relative;
  z-index: 25;
  background: var(--panel-solid);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 10px 30px rgba(0,0,0,.06);
}
.filter-row {
  min-height: 47px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px 20px 7px 24px;
}
.filter-row + .filter-row { border-top: 1px solid var(--border); }
.filter-heading {
  flex: 0 0 94px;
  display: flex;
  align-items: center;
  gap: 9px;
}
.filter-index {
  color: var(--accent);
  font: 600 9px/1 "Space Grotesk", sans-serif;
  letter-spacing: .08em;
}
.filter-label {
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .04em;
  white-space: nowrap;
}
.chip-scroller {
  min-width: 0;
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
}
.chip-scroller::-webkit-scrollbar { display: none; }

.chip {
  min-height: 28px;
  padding: 4px 10px;
  color: var(--muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 5px;
  font-size: 11px;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: color .14s ease, border-color .14s ease, background .14s ease, transform .14s ease;
}
.chip:hover { color: var(--text); background: var(--panel-strong); border-color: var(--border); }
.chip:active { transform: translateY(1px); }
.chip.active {
  color: var(--accent-bright);
  background: var(--accent-soft);
  border-color: rgba(44,198,201,.22);
  font-weight: 600;
}
.chip-action {
  flex: 0 0 auto;
  color: var(--text);
  border-color: var(--border);
}

#label-slider-wrap {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 3px;
  padding-left: 14px;
  border-left: 1px solid var(--border);
  white-space: nowrap;
}
#label-slider {
  width: 86px;
  height: 3px;
  accent-color: var(--accent);
  cursor: pointer;
}
#label-slider-val {
  min-width: 3em;
  color: var(--accent);
  font-size: 10px;
  font-weight: 600;
}

.family-select-wrap {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 4px;
  padding-left: 14px;
  border-left: 1px solid var(--border);
}
.select-shell { position: relative; }
.select-shell::after {
  content: "⌄";
  position: absolute;
  right: 8px;
  top: 50%;
  color: var(--muted);
  pointer-events: none;
  transform: translateY(-55%);
}
#family-select {
  max-width: 230px;
  height: 30px;
  padding: 0 28px 0 10px;
  color: var(--text);
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 11px;
  outline: none;
  appearance: none;
  cursor: pointer;
}
#family-select:focus { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }

/* ---------- Network canvas ---------- */
#container {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  isolation: isolate;
  background-color: var(--canvas);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 32px 32px;
}
#container::before,
#container::after {
  content: "";
  position: absolute;
  z-index: 1;
  width: 34px;
  height: 34px;
  pointer-events: none;
}
#container::before { top: 18px; left: 18px; border-top: 1px solid var(--border-strong); border-left: 1px solid var(--border-strong); }
#container::after { right: 18px; bottom: 18px; border-right: 1px solid var(--border-strong); border-bottom: 1px solid var(--border-strong); }
#graph {
  position: absolute;
  z-index: 0;
  inset: 0;
  display: block;
  background: transparent !important;
  touch-action: none;
  cursor: grab;
  outline: none;
}
#graph:active { cursor: grabbing; }
#graph:focus-visible { box-shadow: inset 0 0 0 2px var(--accent); }
.canvas-zoom {
  position: absolute;
  z-index: 12;
  right: 24px;
  bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.canvas-zoom button {
  width: 34px;
  height: 34px;
  padding: 0;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  box-shadow: var(--shadow-soft);
  font: 600 20px/1 "Space Grotesk", sans-serif;
  cursor: pointer;
  backdrop-filter: blur(12px);
}
.canvas-zoom button:hover { color: var(--accent-bright); border-color: var(--accent); background: var(--accent-soft); }
.canvas-vignette {
  position: absolute;
  z-index: 1;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 50% 48%, transparent 38%, rgba(0,0,0,.1) 115%);
}
body.dark .canvas-vignette { background: radial-gradient(circle at 50% 48%, transparent 34%, rgba(0,0,0,.36) 118%); }
.network-hud {
  position: absolute;
  z-index: 10;
  top: 16px;
  left: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font: 500 9px/1 "Space Grotesk", "Noto Sans SC", sans-serif;
  letter-spacing: .11em;
  pointer-events: none;
}
.live-dot {
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent);
}
.hud-divider { width: 26px; height: 1px; background: var(--border-strong); }

/* ---------- Legend ---------- */
#legend {
  position: absolute;
  z-index: 15;
  left: 24px;
  bottom: 24px;
  width: 170px;
  max-height: calc(100% - 80px);
  overflow: auto;
  padding: 12px 13px;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 7px;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(15px);
  font-size: 10px;
  line-height: 1.65;
  scrollbar-width: thin;
}
#legend .legend-row { display: flex; align-items: center; gap: 7px; }
#legend .legend-dot { width: 7px; height: 7px; border-radius: 50%; flex: 0 0 auto; box-shadow: 0 0 0 1px rgba(255,255,255,.08); }
#legend .legend-shape { width: 10px; height: 10px; flex: 0 0 auto; opacity: .8; }
#legend .legend-title {
  margin-bottom: 4px;
  color: var(--text);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* ---------- Loading and tooltip ---------- */
#loading {
  position: absolute;
  z-index: 18;
  top: 50%;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 11px 15px;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 7px;
  box-shadow: var(--shadow-soft);
  font-size: 11px;
  letter-spacing: .03em;
  transform: translate(-50%, -50%);
  pointer-events: none;
  backdrop-filter: blur(12px);
}
#loading.hidden { display: none; }
.loading-spinner {
  width: 13px;
  height: 13px;
  border: 1.5px solid var(--border-strong);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

#tooltip {
  position: fixed;
  z-index: 50;
  max-width: 320px;
  padding: 10px 12px;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-left: 2px solid var(--accent);
  border-radius: 5px;
  box-shadow: var(--shadow);
  font-size: 11px;
  line-height: 1.7;
  pointer-events: none;
  backdrop-filter: blur(14px);
}
#tooltip b { font-size: 13px; }
#tooltip.hidden { display: none; }

/* ---------- Detail panel ---------- */
#detail {
  position: absolute;
  z-index: 40;
  top: calc(var(--topbar-h) + 95px);
  right: 0;
  bottom: 0;
  width: 370px;
  max-width: 94vw;
  overflow-y: auto;
  padding: 23px 24px 30px 28px;
  color: var(--text);
  background: var(--panel);
  border-left: 1px solid var(--border);
  box-shadow: -22px 0 70px rgba(0,0,0,.28);
  backdrop-filter: blur(22px) saturate(120%);
  transition: transform .24s cubic-bezier(.22,.72,.24,1), opacity .2s ease;
}
#detail.hidden { visibility: hidden; opacity: 0; transform: translateX(0); pointer-events: none; }
.detail-rail {
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent 30%);
}
.detail-kicker {
  margin: 0 40px 20px 0;
  color: var(--accent);
  font: 600 9px/1 "Space Grotesk", sans-serif;
  letter-spacing: .14em;
}
#detail-close {
  position: absolute;
  top: 15px;
  right: 17px;
  width: 30px;
  height: 30px;
  padding: 0 0 2px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}
#detail-close:hover { color: var(--text); background: var(--panel-strong); border-color: var(--border-strong); }
#detail-body h2 {
  margin: 0 0 4px;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .04em;
}
#detail-body .alias { margin: 0 0 21px; color: var(--muted); font-size: 12px; }
#detail-body .kv {
  display: grid;
  grid-template-columns: 66px 1fr;
  gap: 12px;
  min-height: 34px;
  align-items: start;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  line-height: 1.5;
}
#detail-body .kv .k { color: var(--muted); }
#detail-body .kv .v { color: var(--text); }
#detail-body .section-title {
  margin: 24px 0 8px;
  padding-top: 16px;
  color: var(--accent);
  border-top: 1px solid var(--border-strong);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
}
#detail-body ul.rels { max-height: 42vh; overflow-y: auto; margin: 0; padding: 0; list-style: none; scrollbar-width: thin; }
#detail-body ul.rels li {
  display: flex;
  gap: 10px;
  align-items: center;
  min-height: 38px;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
}
#detail-body .rel-type {
  flex: 0 0 42px;
  padding: 2px 4px;
  color: var(--accent-bright);
  background: var(--accent-soft);
  border: 1px solid rgba(44,198,201,.15);
  border-radius: 3px;
  font-size: 9px;
  text-align: center;
}
#detail-body .rel-name { color: var(--text); cursor: pointer; transition: color .12s; }
#detail-body .rel-name:hover { color: var(--accent); }
#detail-body .rel-sub { color: var(--muted); font-size: 11px; }

/* ---------- Responsive ---------- */
@media (max-width: 1120px) {
  #topbar { grid-template-columns: minmax(250px, 1fr) minmax(220px, .8fr) auto; gap: 15px; }
  #stats { display: none; }
  .filter-heading { flex-basis: 84px; }
  #label-slider-wrap .filter-label { display: none; }
  #family-select { max-width: 190px; }
}

@media (max-width: 820px) {
  :root { --topbar-h: auto; }
  #topbar {
    min-height: 0;
    grid-template-columns: 1fr auto;
    gap: 11px;
    padding: 10px 12px;
  }
  #title-block { grid-column: 1; }
  #subtitle { display: none; }
  #search-wrap { grid-column: 1 / -1; grid-row: 2; max-width: none; }
  #theme-toggle { grid-column: 2; grid-row: 1; }
  .control-deck { overflow: hidden; }
  .filter-row { min-height: 42px; gap: 8px; padding: 6px 10px; }
  .filter-heading { flex-basis: auto; }
  .filter-index { display: none; }
  #label-slider-wrap { display: none; }
  .family-select-wrap { padding-left: 8px; }
  .family-select-wrap > .filter-label { display: none; }
  #family-select { width: 146px; max-width: 146px; }
  #detail { top: 0; width: 360px; }
}

@media (max-width: 580px) {
  .eyebrow { font-size: 8px; }
  #title { font-size: 15px; }
  #search { height: 37px; }
  .filter-row { align-items: center; }
  .filter-heading .filter-label { font-size: 10px; }
  .filter-heading { flex: 0 0 auto; }
  .chip { padding-inline: 8px; }
  #reset-view { font-size: 0; width: 30px; padding: 0; }
  #reset-view span { font-size: 16px; }
  .family-select-wrap { max-width: 44%; }
  #family-select { width: 120px; max-width: 100%; }
  .network-hud { left: 15px; top: 13px; }
  .network-hud .hud-divider, .network-hud .hud-divider + span { display: none; }
  #legend { display: none; }
  #container::before { top: 14px; left: 14px; }
  #container::after { right: 14px; bottom: 14px; }
  #detail {
    inset: auto 0 0 0;
    width: 100%;
    max-width: none;
    max-height: 76%;
    padding: 21px 20px 28px 24px;
    border-top: 1px solid var(--border);
    border-left: 0;
    border-radius: 14px 14px 0 0;
    transform: translateY(0);
  }
  #detail.hidden { transform: translateY(0); }
  .detail-rail { inset: 0 18px auto; width: auto; height: 2px; background: linear-gradient(to right, transparent, var(--accent), transparent); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

@media (prefers-contrast: more) {
  :root { --border: rgba(17,28,38,.3); --border-strong: rgba(17,28,38,.55); }
  body.dark { --border: rgba(220,235,240,.3); --border-strong: rgba(220,235,240,.55); }
  .chip.active { border-color: var(--accent); }
}