/* PixMob IR Encoder — hoja de estilos única.
   Paleta neutra a propósito: el único color saturado de la interfaz debe ser
   el que el usuario está generando. */

:root {
  --bg:        #0d0f12;
  --surface:   #14171c;
  --surface-2: #1b1f26;
  --line:      #262b34;
  --line-soft: #1e232a;
  --text:      #e7eaef;
  --text-dim:  #9aa3b0;
  --text-mute: #6b7481;
  --accent:    #5b9dff;
  --accent-dim:#1d3557;
  --ok:        #4ec98a;
  --warn:      #e0a84a;
  --err:       #f06f6f;
  --radius: 10px;
  --radius-sm: 7px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:        #f6f7f9;
    --surface:   #ffffff;
    --surface-2: #f1f3f6;
    --line:      #dde1e7;
    --line-soft: #e8ebef;
    --text:      #14181d;
    --text-dim:  #545c68;
    --text-mute: #7c8492;
    --accent:    #1f6feb;
    --accent-dim:#d6e4fd;
  }
}

* { box-sizing: border-box; }

/* Cualquier regla display de autor gana al [hidden] del navegador, así que se
   refuerza aquí: varios bloques se ocultan con el atributo desde JS. */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { text-wrap: balance; margin: 0; }
p { text-wrap: pretty; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }

.shell {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: 20px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  background: var(--surface);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  z-index: 60;
}
.skip-link:focus { left: 20px; }

/* ------------------------------------------------------------------ topbar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
  padding-block: 12px;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  flex: none;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 50% 50%, var(--accent) 0 22%, transparent 24%),
    var(--surface-2);
  box-shadow: inset 0 0 0 4px var(--bg);
}

.brand h1 { font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.brand p { margin: 0; font-size: 12.5px; color: var(--text-mute); }

.tabs { display: flex; gap: 2px; flex-wrap: wrap; }

.tabs button {
  appearance: none;
  border: 1px solid transparent;
  background: none;
  color: var(--text-dim);
  font: inherit;
  font-size: 13.5px;
  padding: 6px 13px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.tabs button:hover { color: var(--text); background: var(--surface-2); }
.tabs button[aria-selected="true"] {
  color: var(--text);
  background: var(--surface);
  border-color: var(--line);
}

/* ------------------------------------------------------------------ notice */

.notice {
  display: block;
  margin-top: 18px;
  margin-bottom: 4px;
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
}
.notice > strong:first-child { color: var(--text); }

/* La línea de uso aceptable debe leerse como una condición, no como relleno. */
.notice-use {
  display: block;
  margin-top: 8px;
  padding-left: 11px;
  border-left: 2px solid var(--warn);
  color: var(--text);
}

.notice-links { display: block; margin-top: 8px; }
.notice-links a { margin-right: 16px; }
.notice::before {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  background: var(--warn);
  margin-bottom: 10px;
  border-radius: 2px;
}

/* ------------------------------------------------------------------ layout */

main { padding-block: 22px 60px; }

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.stack { display: flex; flex-direction: column; gap: 18px; min-width: 0; }

@media (max-width: 940px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  min-width: 0;
}

.card h2 {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-mute);
  margin-bottom: 14px;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.card-head h2 { margin: 0; }

.lede {
  max-width: 68ch;
  color: var(--text-dim);
  margin-top: 0;
  margin-bottom: 20px;
}

.hint {
  font-size: 12.5px;
  color: var(--text-mute);
  margin: 8px 0 0;
  line-height: 1.5;
}

/* ------------------------------------------------------------------- color */

.color-row { display: flex; gap: 14px; align-items: flex-start; }

input[type="color"] {
  appearance: none;
  -webkit-appearance: none;
  width: 84px;
  height: 84px;
  flex: none;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: none;
  cursor: pointer;
}
input[type="color"]::-webkit-color-swatch-wrapper { padding: 3px; }
input[type="color"]::-webkit-color-swatch { border: none; border-radius: 5px; }
input[type="color"]::-moz-color-swatch { border: none; border-radius: 5px; }

.color-fields { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 10px; }
.channels { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }

.field { display: flex; flex-direction: column; gap: 5px; min-width: 0; }

.field > span {
  font-size: 11.5px;
  color: var(--text-mute);
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: baseline;
}
.field > span b {
  font-weight: 500;
  color: var(--text-dim);
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 11.5px;
}

input[type="text"],
input[type="number"],
select,
textarea {
  width: 100%;
  font: inherit;
  font-family: var(--mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 7px 9px;
}
select { font-family: var(--sans); }
textarea { resize: vertical; line-height: 1.5; }

input:focus-visible,
select:focus-visible,
textarea:focus-visible,
button:focus-visible,
pre:focus-visible,
[role="tab"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.sliders { display: flex; flex-direction: column; gap: 9px; margin-top: 16px; }

.slider { display: grid; grid-template-columns: 52px minmax(0, 1fr); align-items: center; gap: 10px; }
.slider > span { font-size: 12px; color: var(--text-mute); }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 20px;
  background: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 3px;
  background: var(--line);
}
input[type="range"]::-moz-range-track {
  height: 4px;
  border-radius: 3px;
  background: var(--line);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  margin-top: -5px;
  border-radius: 50%;
  background: var(--text);
  border: none;
}
input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: none;
  border-radius: 50%;
  background: var(--text);
}

/* --------------------------------------------------------- cuantización */

.quantize { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line-soft); }

.swatch-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.swatch-pair figure { margin: 0; }

.swatch {
  height: 54px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #000;
  /* Sin este anillo, un color casi blanco se funde con la tarjeta. */
  box-shadow: inset 0 0 0 1px rgb(0 0 0 / 0.10);
}

.swatch-pair figcaption {
  margin-top: 7px;
  font-size: 11.5px;
  color: var(--text-mute);
  line-height: 1.45;
}
.swatch-pair code {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  color: var(--text-dim);
  font-size: 11.5px;
}

/* Controles que dependen de estado guardado en el dispositivo: plegados y
   marcados, para que nadie los active sin darse cuenta. */
.advanced {
  border: 1px solid var(--line);
  border-left: 2px solid var(--warn);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  background: var(--surface-2);
}
.advanced summary {
  cursor: pointer;
  font-size: 12.5px;
  color: var(--text-dim);
  font-weight: 500;
}
.advanced summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.advanced[open] summary { margin-bottom: 4px; }
.advanced .checks { margin-top: 10px; }
.advanced .checks label { align-items: flex-start; }
.advanced .checks input { margin-top: 3px; }

/* ------------------------------------------------------------------- modo */

.seg { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }

.seg span {
  display: block;
  text-align: center;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  cursor: pointer;
  font-size: 13.5px;
}
.seg small {
  display: block;
  font-size: 11px;
  color: var(--text-mute);
  font-family: var(--mono);
  margin-top: 1px;
}
.seg input:checked + span {
  border-color: var(--accent);
  background: var(--accent-dim);
}
.seg input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 1px; }

.config-fields {
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
}

.envelope-wrap { padding: 2px 0; }
#envelope text { font-variant-numeric: tabular-nums; }

#envelope {
  width: 100%;
  height: auto;
  display: block;
  background: var(--surface-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
}

.checks { display: flex; flex-direction: column; gap: 8px; }
.checks label,
.check-inline {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  color: var(--text-dim);
  cursor: pointer;
}
.check-inline { margin-top: 12px; }
input[type="checkbox"] { accent-color: var(--accent); width: 15px; height: 15px; flex: none; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 460px) { .grid-2, .channels { grid-template-columns: 1fr; } }

/* ----------------------------------------------------------------- salida */

.out {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.65;
  background: var(--surface-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin: 0;
  overflow-x: auto;
  white-space: pre;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.out.wrap { white-space: pre-wrap; word-break: break-all; }
.out-sm { font-size: 12px; padding: 10px; }

.output-card .out { max-height: 190px; overflow-y: auto; white-space: pre-wrap; word-break: break-all; }

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 14px 0 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.stats > div { background: var(--surface); padding: 9px 11px; }
.stats dt { font-size: 11px; color: var(--text-mute); }
.stats dd {
  margin: 2px 0 0;
  font-family: var(--mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.downloads {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-wrap: wrap;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}
.downloads > span { font-size: 12px; color: var(--text-mute); margin-right: 2px; }

.btn {
  appearance: none;
  font: inherit;
  font-size: 13px;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  cursor: pointer;
}
.btn:hover { border-color: var(--text-mute); }
.btn:active { transform: translateY(1px); }
.btn-sm { font-size: 12px; padding: 5px 10px; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.08); }

.actions { display: flex; gap: 7px; flex-wrap: wrap; }

/* ------------------------------------------------------------------ capas */

.layer { margin-top: 16px; }
.layer:first-of-type { margin-top: 0; }

.layer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 7px;
}
.layer-head h3 { font-size: 12.5px; font-weight: 600; color: var(--text-dim); }

.bytemap {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 8px;
}
.bytemap > div {
  border: 1px solid var(--line-soft);
  border-radius: 5px;
  padding: 5px 8px;
  background: var(--surface-2);
  min-width: 62px;
}
.bytemap b {
  display: block;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
}
.bytemap span { display: block; font-size: 10.5px; color: var(--text-mute); }

#waveform {
  width: 100%;
  height: 60px;
  display: block;
  background: var(--surface-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
}

/* ---------------------------------------------------------------- presets */

.preset-cat { margin-bottom: 32px; }

.preset-cat header {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.preset-cat h2 { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.preset-cat p { margin: 5px 0 0; font-size: 13px; color: var(--text-mute); max-width: 62ch; }

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
}

.preset {
  display: flex;
  flex-direction: column;
  gap: 0;
  text-align: left;
  appearance: none;
  font: inherit;
  padding: 0;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.preset:hover { border-color: var(--text-mute); }

.preset .chip {
  height: 46px;
  border-bottom: 1px solid var(--line-soft);
  box-shadow: inset 0 0 0 1px rgb(0 0 0 / 0.10);
}
.preset .meta { padding: 9px 10px 10px; }
.preset .name { font-size: 13px; font-weight: 500; }
.preset .sub {
  font-size: 11px;
  color: var(--text-mute);
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  margin-top: 2px;
}
.preset .note { font-size: 11px; color: var(--text-mute); margin-top: 3px; line-height: 1.4; }

/* ------------------------------------------------------------- analizador */

.analyzer-output { font-size: 13.5px; }

.verdict {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 11px;
  border-radius: 999px;
  border: 1px solid;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.verdict.ok { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, transparent); }
.verdict.warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, transparent); }
.verdict.err { color: var(--err); border-color: color-mix(in srgb, var(--err) 40%, transparent); }

.kv {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 5px 16px;
  margin: 14px 0 0;
  font-size: 13px;
}
.kv dt { color: var(--text-mute); }
.kv dd {
  margin: 0;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}

.result-swatch {
  display: inline-block;
  width: 13px;
  height: 13px;
  border-radius: 3px;
  border: 1px solid var(--line);
  vertical-align: -2px;
  margin-right: 7px;
}

/* ------------------------------------------------------------------ prose */

.prose { max-width: 76ch; }
.prose h2 { font-size: 20px; font-weight: 600; letter-spacing: -0.015em; margin-bottom: 10px; }
.prose h4 {
  font-size: 13.5px;
  font-weight: 600;
  margin-top: 22px;
  margin-bottom: 8px;
}
.prose h3 {
  font-size: 15px;
  font-weight: 600;
  margin-top: 34px;
  margin-bottom: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.prose p { color: var(--text-dim); }
.prose code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--surface-2);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  padding: 1px 4px;
}

.pipeline { list-style: none; counter-reset: step; padding: 0; margin: 18px 0; }
.pipeline li {
  counter-increment: step;
  position: relative;
  padding: 9px 0 9px 42px;
  border-bottom: 1px solid var(--line-soft);
}
.pipeline li:last-child { border-bottom: none; }
.pipeline li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 10px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--surface);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-mute);
}
.pipeline b { font-weight: 500; font-size: 14px; }
.pipeline span { display: block; font-size: 12.5px; color: var(--text-mute); }

.facts { padding-left: 20px; color: var(--text-dim); }
.facts li { margin-bottom: 8px; }
.facts b { color: var(--text); font-weight: 600; }

.sources { list-style: none; padding: 0; }
.sources li {
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
}
.sources li:last-child { border-bottom: none; }
.sources span { display: block; font-size: 12.5px; color: var(--text-mute); margin-top: 2px; }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
caption { text-align: left; font-size: 12px; color: var(--text-mute); padding-bottom: 8px; }
th, td {
  text-align: left;
  padding: 6px 12px 6px 0;
  border-bottom: 1px solid var(--line-soft);
  font-variant-numeric: tabular-nums;
}
th { font-weight: 500; color: var(--text-mute); font-size: 12px; }
td { font-family: var(--mono); }

.selftest { font-size: 13px; }
.selftest ul { list-style: none; padding: 0; margin: 10px 0 0; }
.selftest li { padding: 4px 0; display: flex; gap: 9px; align-items: baseline; }
.selftest .mark { font-family: var(--mono); flex: none; }
.selftest .pass .mark { color: var(--ok); }
.selftest .fail .mark { color: var(--err); }
.selftest .detail { color: var(--text-mute); font-family: var(--mono); font-size: 11.5px; }

/* ----------------------------------------------------------------- footer */

.footer {
  border-top: 1px solid var(--line);
  padding-block: 20px;
  margin-top: 40px;
}
.footer p { margin: 0; font-size: 12.5px; color: var(--text-mute); }

/* ------------------------------------------------------------------ toast */

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 12px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 9px 16px;
  font-size: 13px;
  box-shadow: 0 8px 24px rgb(0 0 0 / 0.3);
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease-out, transform 160ms ease-out;
  z-index: 50;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}