/* =========================================================
   Two Trees — blueprint sheet

   Deep blue ground, cyan hairlines, technical lettering, and
   a dimension line down the side of each drawing giving its
   height. One warm accent, used only for the node currently
   being compared.
   ========================================================= */

:root {
  --ground: #0a1c30;
  --ground-2: #0d2440;
  --grid: rgba(120, 190, 235, 0.09);
  --grid-major: rgba(120, 190, 235, 0.16);

  --line: #6fc3ee;
  --line-soft: rgba(111, 195, 238, 0.4);
  --ink: #dbeefb;
  --ink-2: #9dc4dd;
  --ink-3: #6f95b0;

  --live: #ffb648;
  --found: #7ee0a8;
  --miss: #ff8a7a;

  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--ground);
  /* blueprint grid: 8px minor, 40px major */
  background-image: repeating-linear-gradient(
      to right,
      var(--grid) 0 1px,
      transparent 1px 8px
    ),
    repeating-linear-gradient(to bottom, var(--grid) 0 1px, transparent 1px 8px),
    repeating-linear-gradient(to right, var(--grid-major) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(to bottom, var(--grid-major) 0 1px, transparent 1px 40px);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.55;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
}

button,
input,
select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--live);
  outline-offset: 2px;
}

code {
  font-family: inherit;
  color: var(--line);
}

.sheet {
  max-width: 1120px;
  margin-inline: auto;
  padding: clamp(1.25rem, 4vw, 2.5rem) clamp(0.85rem, 3vw, 2rem) 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

/* --- masthead --- */

.stamp {
  margin: 0;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--ink-3);
}

.masthead h1 {
  margin: 0.4rem 0 0;
  font-size: clamp(2.1rem, 7vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
}

.lede {
  max-width: 68ch;
  margin: 0.75rem 0 0;
  color: var(--ink-2);
}

/* --- controls --- */

.controls {
  border: 1px solid var(--line-soft);
  padding: 0.85rem 0.95rem;
  background: rgba(13, 36, 64, 0.72);
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.5rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.field > span {
  font-size: 0.63rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.field input,
.field select {
  background: var(--ground);
  border: 1px solid var(--line-soft);
  border-radius: 0;
  padding: 0.42rem 0.55rem;
  width: 8rem;
  font-size: 0.85rem;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--live);
}

.primary,
.quiet {
  border-radius: 0;
  padding: 0.45rem 0.85rem;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--line);
}

.primary {
  background: var(--line);
  color: #06182a;
}

.primary:hover {
  background: #8bd3f5;
}

.quiet {
  background: transparent;
  color: var(--ink-2);
  border-color: var(--line-soft);
}

.quiet:hover {
  border-color: var(--line);
  color: var(--ink);
}

button:disabled {
  opacity: 0.42;
  cursor: not-allowed;
}

.hint {
  margin: 0.55rem 0 0;
  min-height: 1.2em;
  font-size: 0.78rem;
  color: var(--ink-3);
}

.hint.is-warn {
  color: var(--live);
}

/* --- scoreboard --- */

.scoreboard {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: stretch;
  gap: 0.6rem;
}

.score {
  border: 1px solid var(--line-soft);
  background: rgba(13, 36, 64, 0.72);
  padding: 0.7rem 0.9rem;
}

#score-skewed {
  text-align: right;
}

.score-label {
  margin: 0;
  font-size: 0.63rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.score-value {
  margin: 0.15rem 0 0;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

#score-skewed .score-value {
  justify-content: flex-end;
}

.score-unit {
  font-size: 0.63rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.score-meta {
  margin: 0.2rem 0 0;
  font-size: 0.72rem;
  color: var(--ink-2);
}

.score.is-live .score-value {
  color: var(--live);
}

.verdict {
  display: grid;
  place-items: center;
  padding-inline: 0.9rem;
  border: 1px dashed var(--line-soft);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  text-align: center;
  min-width: 8rem;
}

.verdict.is-done {
  border-style: solid;
  border-color: var(--found);
  color: var(--found);
}

.verdict.is-miss {
  border-style: solid;
  border-color: var(--miss);
  color: var(--miss);
}

/* --- the drawings --- */

.panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.panel {
  margin: 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.panel figcaption {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding-bottom: 0.4rem;
}

.cap-title {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--ink);
}

.cap-note {
  font-size: 0.68rem;
  color: var(--ink-3);
}

.frame {
  position: relative;
  height: 430px;
  overflow-y: auto;
  overflow-x: hidden;
  border: 1px solid var(--line-soft);
  background: rgba(10, 28, 48, 0.55);
  scrollbar-width: thin;
  scrollbar-color: var(--line-soft) transparent;
}

.frame::-webkit-scrollbar {
  width: 9px;
}

.frame::-webkit-scrollbar-thumb {
  background: var(--line-soft);
}

.frame svg {
  display: block;
}

.scroll-note {
  margin: 0.4rem 0 0;
  font-size: 0.68rem;
  color: var(--ink-3);
  min-height: 1.2em;
}

.scroll-note.is-long {
  color: var(--live);
}

/* svg parts */

.edge {
  stroke: var(--line-soft);
  stroke-width: 1;
  fill: none;
}

.edge.is-path {
  stroke: var(--live);
  stroke-width: 1.6;
}

.node circle {
  fill: var(--ground-2);
  stroke: var(--line-soft);
  stroke-width: 1;
}

.node text {
  fill: var(--ink-2);
  font-size: 8.5px;
  font-weight: 400;
  text-anchor: middle;
  dominant-baseline: central;
  pointer-events: none;
}

.node.is-seen circle {
  stroke: var(--line);
  fill: #123a5e;
}

.node.is-seen text {
  fill: var(--ink);
}

.node.is-live circle {
  stroke: var(--live);
  stroke-width: 2;
  fill: #3a2a10;
}

.node.is-live text {
  fill: var(--live);
  font-weight: 700;
}

.node.is-found circle {
  stroke: var(--found);
  stroke-width: 2.4;
  fill: #1032229e;
}

.node.is-found text {
  fill: var(--found);
  font-weight: 700;
}

.dim {
  stroke: var(--line-soft);
  stroke-width: 1;
}

.dim-label {
  fill: var(--ink-3);
  font-size: 8.5px;
  letter-spacing: 0.08em;
}

/* --- title block --- */

.titleblock {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line-soft);
  background: rgba(13, 36, 64, 0.72);
}

.tb-cell {
  padding: 0.6rem 0.85rem;
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.tb-cell:nth-child(3n) {
  border-right: none;
}

.tb-cell.wide {
  grid-column: span 2;
  border-bottom: none;
}

.tb-cell.action {
  border-bottom: none;
  display: grid;
  place-items: center;
}

.tb-label {
  margin: 0;
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.tb-value {
  margin: 0.15rem 0 0;
  font-size: 0.8rem;
  color: var(--ink);
}

.tb-value b {
  color: var(--line);
  font-weight: 500;
}

.colophon {
  font-size: 0.72rem;
  color: var(--ink-3);
}

.colophon a {
  color: var(--ink-2);
  text-underline-offset: 3px;
}

.colophon p {
  margin: 0;
}

/* --- narrow --- */

@media (max-width: 760px) {
  .panels {
    grid-template-columns: 1fr;
  }

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

  #score-skewed,
  #score-skewed .score-value {
    text-align: left;
    justify-content: flex-start;
  }

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

  .tb-cell {
    border-right: none;
  }

  .tb-cell.wide {
    grid-column: span 1;
    border-bottom: 1px solid var(--line-soft);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }
}