/* FILEFOSSIL — natural-history plate.
   Serif furniture, hairline rules, aged paper drawn procedurally on #paper. */

:root {
  --paper: #e7dcc0;
  --ink: #241c11;
  --ink-2: rgba(36, 28, 17, .70);
  --ink-3: rgba(36, 28, 17, .48);
  --rule: rgba(36, 28, 17, .34);
  --rule-2: rgba(36, 28, 17, .16);
  --field: rgba(255, 250, 232, .42);
  --serif: 'Iowan Old Style', 'Palatino Linotype', Palatino, 'Book Antiqua', Georgia, 'Times New Roman', serif;
  --mono: ui-monospace, 'SF Mono', SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace;
  --accent: #6b4a1e;
}

html[data-ground="slate"] {
  --paper: #1c1d21;
  --ink: #e9e3d1;
  --ink-2: rgba(233, 227, 209, .72);
  --ink-3: rgba(233, 227, 209, .50);
  --rule: rgba(233, 227, 209, .30);
  --rule-2: rgba(233, 227, 209, .14);
  --field: rgba(255, 250, 232, .05);
  --accent: #cbab6d;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  -webkit-text-size-adjust: 100%;
}

#paper {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  display: block;
}

.plate {
  max-width: 1420px;
  margin: 0 auto;
  padding: clamp(14px, 2.4vw, 30px) clamp(12px, 3vw, 34px) 26px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.6vw, 20px);
}

/* ------------------------------------------------------------ masthead */
.masthead { text-align: center; }
.masthead h1 {
  margin: .28em 0 .1em;
  font-size: clamp(28px, 5.4vw, 54px);
  font-weight: 500;
  letter-spacing: clamp(.22em, .9vw, .42em);
  text-transform: uppercase;
  text-indent: clamp(.22em, .9vw, .42em);
  line-height: 1;
}
.masthead__sub {
  margin: 0;
  font-style: italic;
  font-size: clamp(11px, 1.5vw, 14px);
  color: var(--ink-2);
  letter-spacing: .06em;
}
.masthead__rules { display: block; }
.masthead__rules i {
  display: block;
  height: 1px;
  background: var(--rule);
}
.masthead__rules i + i { margin-top: 2px; height: 1px; background: var(--rule-2); }
.masthead__rules--under { margin-top: .7em; }
.masthead__rules--under i:first-child { background: var(--rule-2); }
.masthead__rules--under i:last-child { background: var(--rule); }

/* ------------------------------------------------------------- columns */
.columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 372px);
  gap: clamp(12px, 2vw, 26px);
  flex: 1 1 auto;
  min-height: 0;
}

/* --------------------------------------------------------------- stage */
.stage {
  position: relative;
  border: 1px solid var(--rule);
  outline: 3px double transparent;
  box-shadow: inset 0 0 0 4px var(--rule-2);
  background: var(--field);
  min-height: 340px;
  overflow: hidden;
}
.stage canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: grab;
}
.stage canvas:active { cursor: grabbing; }
.stage canvas:focus-visible { outline: 2px solid var(--accent); outline-offset: -4px; }

.stage__hint {
  position: absolute;
  left: 12px;
  bottom: 9px;
  margin: 0;
  font-size: 11px;
  font-style: italic;
  letter-spacing: .04em;
  color: var(--ink-3);
  pointer-events: none;
}
.stage__badge {
  position: absolute;
  top: 10px;
  left: 12px;
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  padding: 3px 8px;
  border: 1px solid var(--rule);
  color: var(--ink-2);
  background: var(--field);
}
.stage__progress {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 8px 12px 10px;
  background: linear-gradient(to top, rgba(0, 0, 0, .06), transparent);
}
.stage__progress-label {
  display: block;
  font-size: 11px;
  font-style: italic;
  color: var(--ink-2);
  margin-bottom: 4px;
}
.stage__progress-track {
  display: block;
  height: 2px;
  background: var(--rule-2);
}
.stage__progress-track i {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--ink);
  transition: width .12s linear;
}

/* ---------------------------------------------------------------- card */
.card {
  border: 1px solid var(--rule);
  box-shadow: inset 0 0 0 4px var(--rule-2);
  background: var(--field);
  padding: clamp(12px, 1.6vw, 20px);
  overflow-y: auto;
  max-height: min(72vh, 760px);
}
.card__cat {
  margin: 0;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.card__binomial {
  margin: .18em 0 .1em;
  font-style: italic;
  font-weight: 500;
  font-size: clamp(21px, 2.6vw, 29px);
  line-height: 1.1;
  letter-spacing: .005em;
}
.card__order {
  margin: 0 0 1em;
  font-size: 12.5px;
  color: var(--ink-2);
  letter-spacing: .03em;
  word-break: break-word;
}
.card__head {
  margin: 1.15em 0 .5em;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-2);
  border-bottom: 1px solid var(--rule);
  padding-bottom: .35em;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}
.card__head small {
  font-weight: 400;
  font-size: 9.5px;
  letter-spacing: .06em;
  text-transform: none;
  font-style: italic;
  color: var(--ink-3);
  text-align: right;
  min-width: 0;
}
@media (max-width: 400px) {
  .card__head { flex-wrap: wrap; }
  .card__head small { flex-basis: 100%; text-align: left; }
}

.measures { margin: 0; display: grid; grid-template-columns: 1fr auto; gap: 1px 10px; }
.measures dt {
  font-size: 12px;
  color: var(--ink-2);
  padding: 2px 0;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}
.measures dt::after {
  content: '';
  position: absolute;
  bottom: .38em;
  margin-left: .4em;
  width: 100%;
  border-bottom: 1px dotted var(--rule-2);
}
.measures dd {
  margin: 0;
  padding: 2px 0;
  font-family: var(--mono);
  font-size: 11.5px;
  text-align: right;
  white-space: nowrap;
  transition: background-color .5s ease;
}
.measures dd.changed { background: rgba(160, 110, 30, .28); }

.traits { list-style: none; margin: 0; padding: 0; }
.traits li {
  padding: 5px 0;
  border-bottom: 1px dotted var(--rule-2);
  font-size: 12px;
  line-height: 1.35;
}
.traits li:last-child { border-bottom: 0; }
.traits b {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.traits .cause {
  display: block;
  font-style: italic;
  color: var(--ink-3);
  font-size: 11px;
}
.traits .cause::before { content: '← '; }

.card__note {
  margin: 1.2em 0 0;
  font-size: 10.5px;
  line-height: 1.5;
  color: var(--ink-3);
  border-top: 1px solid var(--rule-2);
  padding-top: .8em;
}

/* ------------------------------------------------------------- console */
.console {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.2fr) minmax(0, .8fr);
  gap: clamp(10px, 2vw, 26px);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 14px 0 16px;
}
.console__group { min-width: 0; }
.console__group h4 {
  margin: 0 0 .7em;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-2);
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.console__group h4 small {
  font-weight: 400;
  letter-spacing: .04em;
  text-transform: none;
  font-style: italic;
  font-size: 10.5px;
  color: var(--ink-3);
}
.console__row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
.console__row:last-child { margin-bottom: 0; }
.console__drop { font-size: 11.5px; font-style: italic; color: var(--ink-3); }
.console__meta { margin: 6px 0 0; font-size: 10.5px; font-style: italic; color: var(--ink-3); }

.btn {
  font-family: var(--serif);
  font-size: 12px;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--field);
  border: 1px solid var(--rule);
  padding: 8px 13px;
  min-height: 38px;
  cursor: pointer;
  transition: background-color .15s ease, color .15s ease;
}
.btn:hover:not(:disabled) { background: rgba(120, 88, 36, .16); }
.btn:active:not(:disabled) { background: rgba(120, 88, 36, .28); }
.btn:disabled { opacity: .42; cursor: default; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn--primary { border-width: 2px; font-weight: 600; }
.btn--file { display: inline-flex; align-items: center; }

.chips { gap: 6px; }
.chip {
  font-family: var(--serif);
  font-size: 11.5px;
  padding: 6px 10px;
  min-height: 34px;
  border: 1px solid var(--rule-2);
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
  text-align: left;
  line-height: 1.15;
}
.chip:hover { background: rgba(120, 88, 36, .14); }
.chip[aria-pressed="true"] { border-color: var(--rule); color: var(--ink); background: var(--field); font-weight: 600; }
.chip:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.chip em { display: block; font-size: 9.5px; font-style: italic; color: var(--ink-3); letter-spacing: .02em; }

.slider label {
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-3);
  width: 46px;
  flex: 0 0 auto;
}
.slider input[type="range"] {
  flex: 1 1 120px;
  min-width: 90px;
  -webkit-appearance: none;
  appearance: none;
  height: 26px;
  background: transparent;
  cursor: pointer;
}
.slider input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--rule);
}
.slider input[type="range"]::-moz-range-track { height: 2px; background: var(--rule); }
.slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 13px; height: 13px;
  margin-top: -5.5px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--paper);
}
.slider input[type="range"]::-moz-range-thumb {
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--paper);
}
.slider input[type="range"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-2);
  min-width: 92px;
  text-align: right;
  flex: 0 0 auto;
}

/* -------------------------------------------------------------- overlays */
.dropveil {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  background: rgba(231, 220, 192, .86);
  backdrop-filter: blur(1px);
}
html[data-ground="slate"] .dropveil { background: rgba(28, 29, 33, .88); }
.dropveil span {
  border: 1px dashed var(--rule);
  padding: 28px 46px;
  font-size: clamp(16px, 3vw, 26px);
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--ink);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  z-index: 50;
  background: var(--ink);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: .05em;
  padding: 9px 16px;
  max-width: min(92vw, 520px);
  text-align: center;
}

/* ------------------------------------------------------------ responsive */
@media (max-width: 940px) {
  .columns { grid-template-columns: 1fr; }
  .stage { min-height: 56vh; }
  .card { max-height: none; }
  .console { grid-template-columns: 1fr; gap: 18px; }
  .console__group + .console__group { border-top: 1px dotted var(--rule-2); padding-top: 14px; }
}
@media (max-width: 560px) {
  .stage { min-height: 48vh; }
  .stage__hint { font-size: 10px; }
  .num { min-width: 78px; }
  .card__note { font-size: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .stage__progress-track i { transition: none; }
  .measures dd { transition: none; }
}