:root {
  color-scheme: light;
  --canvas: #fbf8f1;
  --panel: #fffdfa;
  --ink: #2a3139;
  --muted: #6f7680;
  --line: #d9d0c3;
  --line-strong: #3b4652;
  --query: #b36a18;
  --query-bg: #fff6e6;
  --answer: #167765;
  --answer-bg: #eef9f5;
  --bad: #b94f4f;
  --bad-bg: #fff1ee;
  --note: #7357e8;
  --note-bg: #f3efff;
  --control: #f1ebe0;
  --control-hover: #e7dfd1;
  --dns-demo-font: 1.1rem;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --canvas: #101316;
  --panel: #171a1f;
  --ink: #f1eee7;
  --muted: #a9adb4;
  --line: #3b424b;
  --line-strong: #d8dde4;
  --query: #f0b15b;
  --query-bg: #2a2115;
  --answer: #75d4c3;
  --answer-bg: #142521;
  --bad: #ff9c96;
  --bad-bg: #2c1817;
  --note: #c2b7ff;
  --note-bg: #211d32;
  --control: #24282e;
  --control-hover: #303640;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Helvetica Neue", Arial, sans-serif;
}

button {
  font: inherit;
}

.dns-demo {
  width: min(100%, 720px);
  margin: 0 auto;
  padding: 6px;
  display: grid;
  gap: 7px;
}

.dns-stage {
  position: relative;
  height: var(--stage-h, 232px);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.dns-node,
.dns-chip,
.dns-flight,
.dns-line,
.dns-badge,
.dns-spinner,
.dns-lane-label {
  position: absolute;
}

.dns-node {
  left: var(--x);
  top: var(--y);
  z-index: 3;
  width: var(--node-w, 112px);
  display: grid;
  justify-items: center;
  gap: 6px;
  color: var(--line-strong);
  transform: translate(-50%, -50%);
}

.dns-node.is-active .dns-icon,
.dns-node[data-active] .dns-icon {
  color: var(--note);
}

.dns-node-label {
  margin: 0;
  color: var(--ink);
  font-size: calc(var(--dns-demo-font) * 0.76);
  font-weight: 760;
  line-height: 1.2;
  text-align: center;
  letter-spacing: 0;
}

.dns-node-sub {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: calc(var(--dns-demo-font) * 0.68);
  font-weight: 680;
}

.dns-icon {
  position: relative;
  width: 54px;
  height: 42px;
  color: var(--line-strong);
}

.dns-icon-computer .screen {
  position: absolute;
  inset: 0 4px 12px;
  border: 2px solid currentColor;
  border-radius: 6px;
  background: var(--panel);
}

.dns-icon-computer .screen::before,
.dns-icon-computer .screen::after {
  content: "";
  position: absolute;
  left: 11px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  opacity: 0.44;
}

.dns-icon-computer .screen::before {
  top: 9px;
  right: 11px;
}

.dns-icon-computer .screen::after {
  top: 17px;
  right: 20px;
}

.dns-icon-computer .stand {
  position: absolute;
  left: 24px;
  bottom: 4px;
  width: 6px;
  height: 10px;
  border-left: 2px solid currentColor;
  border-right: 2px solid currentColor;
}

.dns-icon-computer .base {
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 2px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

.dns-icon-cloud {
  width: 68px;
  height: 44px;
}

.dns-icon-cloud path,
.dns-icon-line path,
.dns-icon-line circle,
.dns-icon-line rect {
  fill: var(--panel);
  stroke: currentColor;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.dns-icon-line {
  width: 52px;
  height: 42px;
}

.dns-icon-server {
  width: 48px;
  height: 42px;
}

.dns-icon-server::before,
.dns-icon-server::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  height: 14px;
  border: 2px solid currentColor;
  border-radius: 6px;
  background: var(--panel);
}

.dns-icon-server::before {
  top: 5px;
}

.dns-icon-server::after {
  bottom: 5px;
}

.dns-icon-server span {
  position: absolute;
  left: 14px;
  right: 14px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  opacity: 0.42;
}

.dns-icon-server span:first-child {
  top: 11px;
}

.dns-icon-server span:last-child {
  bottom: 11px;
}

.dns-line {
  left: var(--x);
  top: var(--y);
  z-index: 1;
  width: var(--w);
  height: 1px;
  transform: rotate(var(--r, 0deg));
  transform-origin: left center;
  background-image: linear-gradient(90deg, var(--line) 58%, transparent 0);
  background-size: 14px 1px;
  background-repeat: repeat-x;
}

.dns-lane-label {
  left: var(--x);
  top: var(--y);
  z-index: 4;
  padding: 3px 7px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 78%, var(--canvas));
  color: var(--muted);
  font-size: calc(var(--dns-demo-font) * 0.68);
  font-weight: 760;
  transform: translate(-50%, -50%);
  white-space: nowrap;
}

.dns-chip,
.dns-flight,
.dns-badge {
  z-index: 6;
  max-width: min(210px, 52vw);
  padding: 5px 9px;
  border: 2px solid var(--query);
  border-radius: 7px;
  background: var(--query-bg);
  color: var(--ink);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.06);
  font-size: calc(var(--dns-demo-font) * 0.74);
  font-weight: 760;
  line-height: 1.25;
  text-align: center;
  white-space: nowrap;
}

.dns-chip,
.dns-badge {
  left: var(--x);
  top: var(--y);
  transform: translate(-50%, -50%);
}

.dns-flight {
  z-index: 2;
  left: var(--from-x);
  top: var(--from-y);
  min-width: 22px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 6px;
  font-size: 0rem;
  transform: translate(-50%, calc(-50% + var(--flight-y, -42px)));
  animation: dns-flight var(--duration, 1.5s) cubic-bezier(.42, 0, .2, 1) infinite;
}

.dns-flight::before {
  content: attr(data-short);
  font-size: calc(var(--dns-demo-font) * 0.66);
  line-height: 1;
}

.dns-flight:not([data-short])::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: currentColor;
}

.dns-chip.answer,
.dns-flight.answer,
.dns-badge.answer {
  border-color: var(--answer);
  background: var(--answer-bg);
}

.dns-chip.bad,
.dns-flight.bad,
.dns-badge.bad {
  border-color: var(--bad);
  background: var(--bad-bg);
}

.dns-chip.note,
.dns-flight.note,
.dns-badge.note {
  border-color: var(--note);
  background: var(--note-bg);
}

.dns-badge {
  color: var(--muted);
}

.dns-spinner {
  left: var(--x);
  top: var(--y);
  z-index: 5;
  width: 22px;
  height: 22px;
  border: 2px solid var(--line);
  border-top-color: var(--note);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  animation: dns-spin 0.85s linear infinite;
}

.dns-mini-card {
  position: absolute;
  left: var(--x);
  top: var(--y);
  z-index: 5;
  min-width: 118px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 88%, var(--canvas));
  transform: translate(-50%, -50%);
}

.dns-mini-title {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: calc(var(--dns-demo-font) * 0.68);
  font-weight: 760;
  line-height: 1;
  text-align: center;
}

.dns-meter {
  height: 6px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--line);
}

.dns-meter span {
  display: block;
  width: var(--value, 70%);
  height: 100%;
  border-radius: inherit;
  background: var(--note);
}

.dns-controls {
  height: 34px;
  display: grid;
  grid-template-columns: 34px 1fr 34px;
  align-items: center;
  gap: 8px;
}

.dns-button {
  width: 34px;
  height: 34px;
  display: inline-grid;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--control);
  color: var(--ink);
  cursor: pointer;
}

.dns-button:hover {
  background: var(--control-hover);
}

.dns-button:focus-visible,
.dns-dot:focus-visible {
  outline: 1px solid var(--note);
  outline-offset: 1px;
}

.dns-button:disabled {
  cursor: default;
  opacity: 0.42;
}

.dns-button svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.dns-progress {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.dns-dot {
  width: 30px;
  height: 6px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: var(--line);
  cursor: pointer;
}

.dns-dot.is-active {
  background: var(--note);
}

.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;
}

[hidden] {
  display: none !important;
}

@keyframes dns-flight {
  0% {
    left: var(--from-x);
    top: var(--from-y);
    opacity: 0;
  }
  16% {
    opacity: 0;
  }
  26%,
  74% {
    opacity: 1;
  }
  84% {
    opacity: 0;
  }
  100% {
    left: var(--to-x);
    top: var(--to-y);
    opacity: 0;
  }
}

@keyframes dns-spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

@media (max-width: 520px) {
  .dns-demo {
    padding: 6px;
  }

  .dns-stage {
    height: var(--stage-h-mobile, 260px);
  }

  .dns-node {
    width: var(--node-w-mobile, var(--node-w, 96px));
  }

  .dns-node-label {
    font-size: calc(var(--dns-demo-font) * 0.7);
  }

  .dns-node-sub {
    font-size: calc(var(--dns-demo-font) * 0.62);
  }

  .dns-chip,
  .dns-flight,
  .dns-badge {
    max-width: min(168px, 48vw);
    padding: 4px 7px;
    font-size: calc(var(--dns-demo-font) * 0.66);
  }

  .dns-dot {
    width: 24px;
  }
}

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