:root {
  --paper: #fafaf8;
  --panel: #ffffff;
  --ink: #111111;
  --graphite: #3a3b3e;
  --muted: #8a8882;
  --faint: #b9b7b1;
  --line: #e7e5e0;
  --grid: #e9e7e2;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", "Helvetica Neue", Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--paper); color: var(--graphite); transition: background-color 1.2s var(--ease), color 1.2s var(--ease); }
body {
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

.lab {
  height: 100svh;
  display: grid;
  grid-template-columns: minmax(360px, 34vw) 1fr;
  gap: 0;
}

/* Editor */
.editor {
  margin: clamp(16px, 2.4vw, 32px);
  margin-right: 0;
  align-self: center;
  height: min(640px, calc(100svh - 2 * clamp(16px, 2.4vw, 32px)));
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 1px 2px rgba(17, 17, 17, 0.04), 0 18px 48px -24px rgba(17, 17, 17, 0.18);
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}
.editor__bar {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 42px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
}
.dots { display: inline-flex; gap: 7px; }
.dots i { width: 11px; height: 11px; border-radius: 50%; background: #e3e1dc; display: block; }
.editor__tab { font: 500 12px/1 var(--sans); color: var(--graphite); letter-spacing: 0.01em; }
.editor__spacer { flex: 1; }
.editor__body {
  flex: 1;
  min-height: 0;
  display: flex;
  overflow: hidden;
  padding: 18px 0;
  font: 400 13px/1.75 var(--mono);
}
.editor__code {
  margin: 0;
  padding: 0 20px 0 0;
  flex: 1;
  position: relative;
}
.editor__code code { font: inherit; color: var(--graphite); display: block; }
.ln { display: grid; grid-template-columns: 46px 1fr; column-gap: 14px; }
.ln__no { color: var(--faint); text-align: right; user-select: none; }
.ln__tx { white-space: pre-wrap; word-break: break-word; min-height: 1.75em; }
.caret {
  display: inline-block;
  width: 2px;
  height: 1.25em;
  background: var(--ink);
  vertical-align: -0.22em;
  margin-left: 1px;
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.editor__status {
  display: flex;
  gap: 16px;
  align-items: center;
  height: 32px;
  padding: 0 16px;
  border-top: 1px solid var(--line);
  font: 500 11px/1 var(--sans);
  color: var(--muted);
}
#status-run::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--graphite);
  margin-right: 8px;
  vertical-align: 1px;
  animation: pulse 1.4s var(--ease) infinite;
}
.done #status-run::before { animation: none; background: var(--faint); }
@keyframes pulse { 50% { opacity: 0.25; } }

/* Resaltado en grises */
.t-com { color: var(--faint); }
.t-key { color: var(--ink); font-weight: 500; }
.t-str { color: #6d6b66; }
.t-num { color: #6d6b66; }
.t-fn  { color: var(--ink); }
.t-pun { color: var(--muted); }

/* Escena */
.stage {
  position: relative;
  min-width: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.stage__grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, var(--grid) 1.1px, transparent 1.2px);
  background-size: 24px 24px;
  opacity: 0;
  transition: opacity 1.4s var(--ease);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 35%, transparent 75%);
  mask-image: radial-gradient(ellipse at center, #000 35%, transparent 75%);
}
.stage__grid { transition: opacity 1.4s var(--ease), background-size 1.2s var(--ease); }
.stage__grid.on { opacity: 1; }
.stage__grid.on.soft { opacity: 0.45; }
.stage__inner {
  position: relative;
  width: min(78%, 760px);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.mark {
  position: relative;
  width: 100%;
  aspect-ratio: 1522 / 236;
}
.mark svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.guides line {
  stroke: #c9c6bf;
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  stroke-dasharray: 3 5;
  opacity: 0;
  transition: opacity 0.9s var(--ease);
}
.guides text {
  font-family: var(--mono);
  font-weight: 500;
  fill: var(--muted);
  opacity: 0;
  transition: opacity 0.9s var(--ease);
}
.guides.on line, .guides.on text { opacity: 1; }
.guides.off line, .guides.off text { opacity: 0; }
.letter {
  fill: transparent;
  stroke: var(--ink);
  stroke-width: 3;
  transition: fill 0.9s var(--ease), stroke-opacity 0.9s var(--ease);
}
.filled .letter { fill: var(--fill, var(--ink)); stroke-opacity: 0; }

.caption, .note {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 1s var(--ease), transform 1s var(--ease), color 1.1s var(--ease),
    letter-spacing 1.1s var(--ease), font-size 1.1s var(--ease), font-weight 1.1s var(--ease);
  text-align: center;
}
.caption {
  margin: clamp(28px, 4.5vw, 56px) 0 0;
  font: 600 clamp(15px, 1.35vw, 19px)/1.2 var(--sans);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
}
.note {
  margin: 14px 0 0;
  font: 400 clamp(15px, 1.4vw, 19px)/1.5 var(--sans);
  color: var(--muted);
}
.note a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--faint); }
.note a:hover { border-bottom-color: var(--ink); }
.show { opacity: 1; transform: none; }

.legal {
  position: fixed;
  left: 50%;
  bottom: 14px;
  transform: translateX(calc(-50% + 17vw));
  font: 400 11px/1 var(--sans);
  color: var(--faint);
  pointer-events: none;
}

/* Móvil y tableta vertical: escena arriba, editor abajo */
@media (max-width: 900px) {
  .lab { grid-template-columns: 1fr; grid-template-rows: 1fr minmax(0, 40svh); }
  .stage { order: -1; }
  .editor { margin: 0 12px 12px; border-radius: 12px; }
  .editor__body { font-size: 11.5px; padding: 12px 0; }
  .ln { grid-template-columns: 30px 1fr; column-gap: 10px; }
  .editor { align-self: stretch; height: auto; }
  .stage__inner { width: 84%; }
  .legal { transform: translateX(-50%); bottom: auto; top: 14px; }
  #status-pos { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* Noche: la página entera cambia de luz */
body.night {
  --paper: #0d0d0e;
  --panel: #161617;
  --ink: #f4f3f0;
  --graphite: #d6d5d1;
  --muted: #8f8d88;
  --faint: #5c5b58;
  --line: #2a2a2b;
  --grid: #262627;
}
.editor, .editor__bar, .editor__status, .dots i {
  transition: background-color 1.2s var(--ease), border-color 1.2s var(--ease), color 1.2s var(--ease);
}
body.night .dots i { background: #333335; }
body.night .editor { box-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 24px 60px -28px rgba(0, 0, 0, 0.8); }
body.night .caret { background: var(--ink); }

/* Efectos */
.fx-canvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.logo { transition: opacity 0.4s var(--ease); }
.shine {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(var(--angle, 105deg), transparent 40%, rgba(255, 255, 255, 0.18) 46%, rgba(255, 255, 255, 0.62) 50%, rgba(255, 255, 255, 0.18) 54%, transparent 60%);
  background-size: 250% 100%;
  -webkit-mask: url("nostok.svg") center / 100% 100% no-repeat;
  mask: url("nostok.svg") center / 100% 100% no-repeat;
}
body.night .shine { background: linear-gradient(var(--angle, 105deg), transparent 40%, rgba(13, 13, 14, 0.12) 46%, rgba(13, 13, 14, 0.45) 50%, rgba(13, 13, 14, 0.12) 54%, transparent 60%); background-size: 250% 100%; }
.mirror {
  transform: translateY(104%) scaleY(-1);
  transform-origin: center;
  -webkit-mask-image: linear-gradient(to top, rgba(0, 0, 0, var(--depth, 0.4)), transparent 70%);
  mask-image: linear-gradient(to top, rgba(0, 0, 0, var(--depth, 0.4)), transparent 70%);
  pointer-events: none;
}
.slice, .echo { pointer-events: none; }
.echo .letter { fill: transparent !important; stroke: var(--ink); stroke-opacity: 1 !important; }

/* Fondo que obedece a una fórmula */
.stage__field {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 78%);
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 78%);
}
body.wave .stage__grid.on { opacity: 0; }

/* Edición en vivo */
.ln--cur { background: color-mix(in srgb, var(--ink) 3.5%, transparent); }
.sel {
  background: color-mix(in srgb, var(--accent, var(--ink)) 18%, transparent);
  color: var(--ink);
  border-radius: 2px;
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent, var(--ink)) 30%, transparent);
}
#status-ver { font-variant-numeric: tabular-nums; }
.t-fn, .t-key, .caret, #status-run::before { transition: color 1s var(--ease), background-color 1s var(--ease); }
.editor { transition: background-color 1.2s var(--ease), border-color 1.2s var(--ease), color 1.2s var(--ease), border-radius 1s var(--ease), box-shadow 1s var(--ease); }

/* El editor cambia de lado (solo en escritorio) */
.editor { view-transition-name: editor; }
.stage__inner { view-transition-name: escena; }
::view-transition-group(*) { animation-duration: 0.9s; animation-timing-function: cubic-bezier(0.65, 0, 0.35, 1); }
@media (min-width: 901px) {
  body.espejo .lab { grid-template-columns: 1fr minmax(360px, 34vw); }
  body.espejo .stage { order: -1; }
  body.espejo .editor { margin-left: 0; margin-right: clamp(16px, 2.4vw, 32px); }
  body.espejo .legal { transform: translateX(calc(-50% - 17vw)); }
}