@font-face { font-family: 'Inter'; src: url('fuentes/Inter-Regular.woff') format('woff'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('fuentes/Inter-Bold.woff') format('woff'); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('fuentes/Inter-Italic.woff') format('woff'); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: 'Lora'; src: url('fuentes/Lora-Bold.woff') format('woff'); font-weight: 700; font-style: normal; font-display: swap; }

:root {
  --tinta: #000;
  --papel: #fff;
  --suave: #555;
  --linea: #000;
  --fino: #bbb;
  --texto: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --titulo: 'Lora', Georgia, serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, 'DejaVu Sans Mono', monospace;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 120px; }
body { margin: 0; background: var(--papel); color: var(--tinta); font: 16px/1.5 var(--texto); }
.envoltura { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
h1, h2, h3, h4 { font-family: var(--titulo); font-weight: 700; line-height: 1.2; }
h1 { font-size: clamp(2rem, 5vw, 3rem); margin: 0 0 .25em; }
h2 { font-size: 1.6rem; margin: 0 0 .4em; padding-top: .6em; border-top: 3px solid var(--linea); }
h3 { font-size: 1.15rem; margin: 1.2em 0 .4em; }
a { color: inherit; }
p { margin: .4em 0 .8em; }
b { font-weight: 700; }

.portada { padding: 32px 0 12px; }
.sub { font-size: 1.05rem; max-width: 46em; }
.indice { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 10px; font-size: .95rem; }
.indice a { text-decoration: none; border-bottom: 1px solid var(--tinta); }

.controles { position: sticky; top: 0; z-index: 10; background: var(--papel); border-top: 1px solid var(--linea); border-bottom: 2px solid var(--linea); }
.controles .fila { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; padding-top: 8px; padding-bottom: 8px; font-size: .9rem; }
.segmento { border: 0; margin: 0; padding: 0; display: flex; align-items: center; gap: 0; }
.segmento legend { float: left; margin-right: 8px; font-weight: 700; padding: 0; }
.segmento label { border: 1.5px solid var(--tinta); padding: 3px 10px; cursor: pointer; user-select: none; }
.segmento label + label { border-left: 0; }
.segmento input { position: absolute; opacity: 0; pointer-events: none; }
.segmento label:has(input:checked) { box-shadow: inset 0 -4px 0 var(--tinta); font-weight: 700; }
.segmento label:focus-within { outline: 2px dashed var(--tinta); outline-offset: 2px; }
.campo { display: flex; align-items: center; gap: 6px; font-weight: 700; }
.campo select, .campo input[type=range] { font: inherit; font-weight: 400; }
.campo select { border: 1.5px solid var(--tinta); background: var(--papel); padding: 2px 4px; border-radius: 0; color: var(--tinta); }
.campo input[type=range] { width: 110px; accent-color: #000; }
.casilla { font-weight: 400; }
.casilla input { accent-color: #000; width: 16px; height: 16px; }
.boton { font: inherit; font-weight: 700; background: var(--papel); color: var(--tinta); border: 1.5px solid var(--tinta); padding: 4px 12px; cursor: pointer; border-radius: 0; }
.boton:hover { box-shadow: inset 0 -3px 0 var(--tinta); }
.boton:focus-visible, [role=button]:focus-visible { outline: 2px dashed var(--tinta); outline-offset: 2px; }
.estado { margin: 0; flex: 1 1 260px; font-style: italic; min-height: 1.5em; }

.bloque { margin: 28px 0 40px; }
.nota { font-size: .9rem; color: var(--suave); }
.leer { display: grid; grid-template-columns: 11em 1fr; gap: 6px 18px; margin: 0; }
.leer dt { font-weight: 700; }
.leer dd { margin: 0; }
.puntos { padding-left: 1.2em; }
.puntos li { margin: .35em 0; }

.adsr-fila { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; align-items: start; }
.adsr { width: 100%; height: auto; border-bottom: 1px solid var(--fino); }
.etapas dt { font-weight: 700; margin-top: .5em; }
.etapas dd { margin: 0; }
.demos { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.demo { display: flex; flex-direction: column; justify-content: flex-start; border: 1.5px solid var(--tinta); background: var(--papel); padding: 8px 10px 10px; text-align: left; cursor: pointer; font: inherit; color: var(--tinta); border-radius: 0; }
.demo b { display: block; font-family: var(--titulo); font-size: 1.02rem; }
.demo span { display: block; font-size: .82rem; margin: 2px 0 6px; min-height: 2.5em; }
.demo canvas { width: 100%; height: 54px; display: block; }
.demo.sonando, .fila-timbre.sonando, .onda.sonando { box-shadow: 0 0 0 2px var(--tinta); }

.acorde { border-top: 2px solid var(--linea); padding: 18px 0 8px; margin-top: 26px; }
.acorde-cab { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.acorde-cab h3 { margin: 0; font-size: 1.45rem; }
.cif { font-weight: 700; font-size: 1.05rem; }
.dice { font-style: italic; margin: .2em 0 .1em; font-size: .92rem; }
.notas { white-space: pre-wrap; font-family: var(--mono); font-size: .82rem; margin: 0 0 .5em; padding-bottom: .5em; border-bottom: 1px solid var(--linea); overflow-wrap: anywhere; }
.siente b { margin-right: .3em; }
.razon { white-space: pre-wrap; font-family: var(--mono); font-size: .8rem; margin: .5em 0; }
.acorde-acc { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 4px; }

.fila-timbre { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2.7fr); gap: 10px 22px; padding: 14px 6px 12px; margin: 6px -6px; }
.fila-timbre h4 { margin: 0; font-size: 1.05rem; }
.cap { font-size: .8rem; font-style: italic; margin: 2px 0 6px; }
.baten { font-size: .8rem; margin: 2px 0 0; }
.espectro { width: 100%; height: 130px; display: block; cursor: pointer; }
.ondas { position: relative; }
.regla { width: 100%; height: 14px; display: block; }
.onda-fila { display: grid; grid-template-columns: 5.6em minmax(0, 1fr); align-items: center; }
.onda-fila .et { font-size: .74rem; font-weight: 700; text-align: right; padding-right: 8px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.onda-fila.suma .et { font-size: .86rem; }
.onda { width: 100%; height: 26px; display: block; cursor: pointer; }
.onda-fila.suma .onda { height: 92px; }
.cabezal { position: absolute; top: 0; bottom: 18px; width: 2px; background: var(--tinta); pointer-events: none; display: none; }
.cabezal.activo { display: block; }

.tabla-env { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .86rem; }
th, td { padding: 5px 8px; border-bottom: 1px solid var(--fino); text-align: left; white-space: nowrap; }
th { border-bottom: 2px solid var(--linea); }
td.num, th.num { text-align: right; font-family: var(--mono); }
tr.corte td { border-top: 2px solid var(--linea); }

.pie { border-top: 2px solid var(--linea); padding: 14px 0 30px; font-size: .85rem; }

@media (max-width: 900px) { .demos { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 720px) {
  html { scroll-padding-top: 12px; }
  .controles { position: static; }
  #detener { position: fixed; right: 12px; bottom: 12px; z-index: 20; padding: 10px 16px; box-shadow: 0 0 0 3px #fff; }
  .leer { grid-template-columns: 1fr; }
  .leer dd { margin-bottom: .5em; }
  .adsr-fila { grid-template-columns: 1fr; }
  .demos { grid-template-columns: 1fr; }
  .fila-timbre { grid-template-columns: 1fr; }
  .espectro { height: 100px; }
  .controles .fila { gap: 6px 12px; }
  .campo input[type=range] { width: 90px; }
  .estado { flex-basis: 100%; }
}