/* El Hipnótico · Music Tools
   Mismo sistema visual que elhipnotico.com (tema oscuro, verde de marca,
   Gentium Book Plus para titulares y Karla para el resto). */

@font-face { font-family: 'Gentium Book Plus'; font-weight: 400; font-display: swap; src: url('../fonts/gentium-400-latin.woff2') format('woff2'); }
@font-face { font-family: 'Gentium Book Plus'; font-weight: 700; font-display: swap; src: url('../fonts/gentium-700-latin.woff2') format('woff2'); }
@font-face { font-family: 'Karla'; font-weight: 400; font-display: swap; src: url('../fonts/karla-400-latin.woff2') format('woff2'); }
@font-face { font-family: 'Karla'; font-weight: 700; font-display: swap; src: url('../fonts/karla-700-latin.woff2') format('woff2'); }

/* Ni Gentium ni Karla tienen ♯ ♭ ♮: esta familia, limitada a esos signos, los toma
   de las fuentes de símbolos del sistema y deja el resto del texto intacto. */
@font-face { font-family: 'MT Accidentals'; src: local('Segoe UI Symbol'), local('SegoeUISymbol'), local('Apple Symbols'), local('Noto Music'), local('Noto Sans Symbols 2'), local('DejaVu Sans'); unicode-range: U+266D-266F; }

/* ---------- Tokens ---------- */
:root {
  --color-bg: #121212;
  --color-ink: #F2F1ED;
  --color-ink-soft: #C7C5BD;
  --color-gray: #9C9A93;
  --color-hairline: #2C2B28;
  --color-accent: #00CD9C;
  --color-accent-hover: #33DFB6;
  --color-accent-dim: rgba(0, 205, 156, .14);
  --color-accent-glow: rgba(0, 205, 156, .35);
  --color-warn: #F2B544;
  --color-danger: #FF6B5E;
  --color-surface: #1C1B18;
  --color-surface-2: #24231F;
  --color-surface-3: #2E2D28;
  --color-footer-bg: #0A0A0A;

  --font-heading: "MT Accidentals", "Gentium Book Plus", Georgia, serif;
  --font-body: "MT Accidentals", "Karla", "Helvetica Neue", Arial, sans-serif;

  --container-max: 1140px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;

  --radius: 6px;
  --radius-media: 10px;
  --radius-lg: 16px;
  --tap: 44px;
  --ease: cubic-bezier(.4, 0, .2, 1);
  color-scheme: dark;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; overflow-x: clip; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.55;
  overflow-x: clip;
  -webkit-tap-highlight-color: transparent;
}
svg { display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--color-accent-hover); }
h1, h2, h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 .5em;
  letter-spacing: -0.01em;
  overflow-wrap: break-word;
}
h1 { font-size: clamp(2rem, 4.2vw, 3.1rem); letter-spacing: -0.5px; }
h2 { font-size: clamp(1.45rem, 2.4vw, 1.9rem); letter-spacing: -0.5px; }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
[hidden] { display: none !important; }

.wrap { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-3); width: 100%; }
@media (max-width: 600px) { .wrap { padding: 0 var(--space-2); } }

.eyebrow {
  display: inline-block;
  font-weight: 700;
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(18, 18, 18, .92);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-hairline);
}
.site-header__brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 12px var(--space-3);
}
.site-brand { display: flex; align-items: baseline; gap: 10px; color: var(--color-ink); }
.site-brand:hover { color: var(--color-ink); }
.site-brand__name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.8rem;
  text-transform: lowercase;
  letter-spacing: -0.3px;
  white-space: nowrap;
  line-height: 1;
}
.site-brand__tag {
  font-weight: 700;
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--color-bg);
  background: var(--color-accent);
  padding: 4px 8px 3px;
  border-radius: 999px;
  white-space: nowrap;
  transform: translateY(-4px);
}
@media (max-width: 420px) {
  .site-brand__name { font-size: 1.5rem; }
}

.tool-nav { border-top: 1px solid var(--color-hairline); position: relative; }
.tool-nav__list {
  max-width: none;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 4px 16px;
  list-style: none;
  padding: 10px var(--space-3);
  flex-wrap: wrap;
}
.tool-nav a {
  display: inline-block;
  font-weight: 700;
  font-size: .78rem;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--color-ink);
  position: relative;
  padding: 2px 0 4px;
  white-space: nowrap;
}
.tool-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%; bottom: 0;
  height: 2px;
  background: var(--color-accent);
  transition: right .2s ease;
}
.tool-nav a:hover { color: var(--color-ink); }
.tool-nav a:hover::after, .tool-nav a[aria-current="page"]::after { right: 0; }
.tool-nav a[aria-current="page"] { color: var(--color-accent); }

/* En pantallas estrechas la fila de herramientas se desliza en horizontal */
@media (max-width: 1199px) {
  .tool-nav__list {
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    padding: 10px var(--space-3);
    gap: var(--space-3);
  }
  .tool-nav__list::-webkit-scrollbar { display: none; }
  .tool-nav::before, .tool-nav::after {
    content: "";
    position: absolute;
    top: 0; bottom: 0;
    width: 28px;
    pointer-events: none;
    z-index: 1;
  }
  .tool-nav::before { left: 0; background: linear-gradient(90deg, rgba(18,18,18,.95), transparent); opacity: 0; transition: opacity .2s ease; }
  .tool-nav::after { right: 0; background: linear-gradient(270deg, rgba(18,18,18,.95), transparent); transition: opacity .2s ease; }
  .tool-nav.is-scrolled-start::before { opacity: 1; }
  .tool-nav.is-at-end::after { opacity: 0; }
}
@media (max-width: 600px) {
  .tool-nav__list { padding: 10px var(--space-2); gap: 20px; }
}

/* ---------- Main ---------- */
.site-main { flex: 1 0 auto; padding: var(--space-4) 0 var(--space-5); }
@media (max-width: 600px) { .site-main { padding: var(--space-3) 0 var(--space-4); } }

.breadcrumb { list-style: none; display: flex; flex-wrap: wrap; margin: 0 0 var(--space-2); padding: 0; font-size: .8rem; color: var(--color-gray); }
.breadcrumb li:not(:last-child)::after { content: "/"; margin: 0 .5em; color: var(--color-hairline); }
.breadcrumb a { color: var(--color-gray); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb [aria-current] { color: var(--color-ink); }

.tool-head { margin-bottom: var(--space-4); max-width: 760px; }
.tool-head h1 { margin-bottom: .3em; }
.tool-head__lede { font-size: 1.1rem; color: var(--color-ink-soft); margin: 0; }
@media (max-width: 600px) {
  .tool-head { margin-bottom: var(--space-3); }
  .tool-head__lede { font-size: 1rem; }
}

/* Escenario (pantalla principal de la herramienta) + panel de controles */
.tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
}
@media (min-width: 960px) {
  .tool-layout { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
  .tool-layout--wide { grid-template-columns: minmax(0, 1fr); }
  .tool-layout > .stage { position: sticky; top: 132px; }
  .tool-layout--wide > .stage { position: static; }
}

.stage {
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-3);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  position: relative;
  overflow: hidden;
}
@media (max-width: 600px) { .stage { padding: var(--space-3) var(--space-2); border-radius: var(--radius-media); } }

.controls { display: grid; gap: var(--space-2); }

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-media);
  padding: var(--space-2) var(--space-3) var(--space-3);
}
@media (max-width: 600px) { .panel { padding: var(--space-2); } }
.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-1);
  margin-bottom: 12px;
  min-height: 32px;
}
.panel__title {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-gray);
  margin: 0;
}
.panel__hint { font-size: .85rem; color: var(--color-gray); margin: 0; }
.panel > * + * { margin-top: var(--space-2); }
.panel > .panel__head + * { margin-top: 0; }
.panel > * + .panel__hint { margin-top: 12px; }

.field { display: grid; gap: 8px; }
.field + .field { margin-top: var(--space-2); }
.field__label { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; font-size: .88rem; font-weight: 700; color: var(--color-ink-soft); }
.field__value { font-weight: 700; color: var(--color-ink); font-variant-numeric: tabular-nums; }
.row { display: flex; align-items: center; gap: var(--space-1); flex-wrap: wrap; }
.row--between { justify-content: space-between; }
.row--center { justify-content: center; }
.grow { flex: 1 1 auto; min-width: 0; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  min-height: var(--tap);
  font-weight: 700;
  font-size: .9rem;
  letter-spacing: .02em;
  padding: .6em 1.3em;
  border-radius: 999px;
  border: 1px solid var(--color-accent);
  background: var(--color-accent);
  color: var(--color-bg);
  transition: background .15s ease, border-color .15s ease, color .15s ease, transform .1s ease;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}
.btn:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); color: var(--color-bg); }
.btn:active { transform: scale(.97); }
.btn svg { width: 18px; height: 18px; flex: 0 0 auto; }
.btn--ghost { background: transparent; border-color: var(--color-hairline); color: var(--color-ink); }
.btn--ghost:hover { background: var(--color-surface-2); border-color: var(--color-accent); color: var(--color-accent); }
.btn--sm { min-height: 36px; padding: .35em 1em; font-size: .82rem; }
.btn--block { width: 100%; }
.btn--danger:hover { border-color: var(--color-danger); color: var(--color-danger); }
.btn[disabled] { opacity: .4; pointer-events: none; }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: var(--tap);
  height: var(--tap);
  flex: 0 0 auto;
  border-radius: 50%;
  border: 1px solid var(--color-hairline);
  background: var(--color-surface-2);
  color: var(--color-ink);
  transition: border-color .15s ease, color .15s ease, background .15s ease, transform .1s ease;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}
.icon-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.icon-btn[disabled] { opacity: .3; pointer-events: none; }
.icon-btn:active { transform: scale(.94); }
.icon-btn svg { width: 20px; height: 20px; }
.icon-btn--sm { width: 34px; height: 34px; }
.icon-btn--sm svg { width: 16px; height: 16px; }
.icon-btn--lg { width: 56px; height: 56px; }
.icon-btn--lg svg { width: 24px; height: 24px; }

/* Botón principal de reproducir/parar */
.play {
  position: relative;
  display: grid;
  place-items: center;
  width: 92px;
  height: 92px;
  border-radius: 50%;
  border: 0;
  background: var(--color-accent);
  color: var(--color-bg);
  box-shadow: 0 0 0 0 var(--color-accent-glow);
  transition: background .15s ease, transform .1s ease, box-shadow .3s ease;
  touch-action: manipulation;
  flex: 0 0 auto;
}
.play:hover { background: var(--color-accent-hover); }
.play:active { transform: scale(.96); }
.play svg { width: 36px; height: 36px; }
.play .icon-stop { display: none; }
.play.is-on .icon-play { display: none; }
.play.is-on .icon-stop { display: block; }
.play.is-on { box-shadow: 0 0 0 10px var(--color-accent-dim); }
.play--sm { width: 64px; height: 64px; }
.play--sm svg { width: 26px; height: 26px; }

/* ---------- Lectura grande ---------- */
.readout {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(4.5rem, 14vw, 7.5rem);
  line-height: .9;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-ink);
  text-align: center;
}
.readout__unit {
  display: block;
  font-family: var(--font-body);
  font-size: .8rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--color-gray);
  margin-top: 10px;
  text-align: center;
}
/* Dígitos de ancho fijo: evita que el número "baile" al cambiar */
.digits { display: inline-flex; font-variant-numeric: tabular-nums; }
.digits > span { display: inline-block; width: .62em; text-align: center; }
.digits > span.sep { width: .3em; }
.digits > span.small { font-size: .5em; width: .62em; align-self: flex-end; margin-bottom: .12em; }

/* ---------- Control segmentado ---------- */
.seg {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.seg button {
  min-height: 38px;
  min-width: 44px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--color-hairline);
  background: var(--color-surface-2);
  color: var(--color-ink-soft);
  font-weight: 700;
  font-size: .85rem;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
  touch-action: manipulation;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.seg button:hover { border-color: var(--color-accent); color: var(--color-ink); }
.seg button[aria-pressed="true"] { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-bg); }
.seg button svg { width: 20px; height: 20px; }
.seg--fill { display: grid; grid-template-columns: repeat(auto-fit, minmax(56px, 1fr)); }
.seg--icons button { padding: 0 10px; }

/* ---------- Stepper (− valor +) ---------- */
.stepper {
  display: grid;
  grid-template-columns: var(--tap) minmax(0, 1fr) var(--tap);
  align-items: center;
  gap: 8px;
}
.stepper__value {
  text-align: center;
  font-weight: 700;
  font-size: 1.15rem;
  font-variant-numeric: tabular-nums;
  background: var(--color-surface-2);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  height: var(--tap);
  width: 100%;
  min-width: 0;
  padding: 0 6px;
  -moz-appearance: textfield;
  appearance: textfield;
}
.stepper__value::-webkit-outer-spin-button, .stepper__value::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.stepper__value:focus { border-color: var(--color-accent); outline: none; }

input[type="number"].input, input[type="text"].input, select.input {
  height: var(--tap);
  padding: 0 12px;
  border-radius: var(--radius);
  border: 1px solid var(--color-hairline);
  background: var(--color-surface-2);
  color: var(--color-ink);
  width: 100%;
  min-width: 0;
}
.input:focus { border-color: var(--color-accent); outline: none; }
.row > .input.grow { width: auto; flex: 1 1 120px; }
select.input {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 36px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239C9A93' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 18px;
}

/* ---------- Range ---------- */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 28px;
  background: transparent;
  margin: 0;
  --fill: 50%;
  touch-action: pan-y;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-accent) var(--fill), var(--color-surface-3) var(--fill));
}
input[type="range"]::-moz-range-track { height: 6px; border-radius: 999px; background: var(--color-surface-3); }
input[type="range"]::-moz-range-progress { height: 6px; border-radius: 999px; background: var(--color-accent); }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  margin-top: -8px;
  border-radius: 50%;
  background: var(--color-ink);
  border: 3px solid var(--color-accent);
  transition: transform .1s ease;
}
input[type="range"]::-moz-range-thumb { width: 16px; height: 16px; border-radius: 50%; background: var(--color-ink); border: 3px solid var(--color-accent); }
input[type="range"]:active::-webkit-slider-thumb { transform: scale(1.15); }
input[type="range"]:focus-visible { outline: none; }
input[type="range"]:focus-visible::-webkit-slider-thumb { box-shadow: 0 0 0 4px var(--color-accent-glow); }

/* ---------- Interruptor ---------- */
.switch { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); cursor: pointer; min-height: 36px; font-size: .92rem; font-weight: 700; color: var(--color-ink-soft); }
.switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.switch__track {
  position: relative;
  flex: 0 0 auto;
  width: 46px;
  height: 26px;
  border-radius: 999px;
  background: var(--color-surface-3);
  border: 1px solid var(--color-hairline);
  transition: background .2s ease, border-color .2s ease;
}
.switch__track::after {
  content: "";
  position: absolute;
  top: 3px; left: 3px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--color-ink-soft);
  transition: transform .2s var(--ease), background .2s ease;
}
.switch input:checked + .switch__track { background: var(--color-accent); border-color: var(--color-accent); }
.switch input:checked + .switch__track::after { transform: translateX(20px); background: var(--color-bg); }
.switch input:focus-visible + .switch__track { box-shadow: 0 0 0 3px var(--color-accent-glow); }

/* ---------- Chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--color-hairline);
  background: transparent;
  color: var(--color-ink-soft);
  font-weight: 700;
  font-size: .85rem;
  touch-action: manipulation;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.chip:hover { border-color: var(--color-accent); color: var(--color-ink); }
.chip[aria-pressed="true"] { background: var(--color-accent-dim); border-color: var(--color-accent); color: var(--color-accent); }

/* ---------- Listas (presets, vueltas, bloques) ---------- */
.list { list-style: none; margin: 0; padding: 0; }
.list__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-hairline);
  min-height: 52px;
}
.list__item:last-child { border-bottom: 0; }
.list__main { flex: 1 1 auto; min-width: 0; }
.list__title { font-weight: 700; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.list__meta { font-size: .8rem; color: var(--color-gray); }
.list__empty { color: var(--color-gray); font-size: .9rem; padding: 6px 0; }
button.list__main { text-align: left; background: none; border: 0; padding: 0; }
button.list__main:hover .list__title { color: var(--color-accent); }

.kbd-hints { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 16px; font-size: .8rem; color: var(--color-gray); margin: 0; }
kbd {
  display: inline-block;
  min-width: 22px;
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--color-hairline);
  border-bottom-width: 2px;
  background: var(--color-surface-2);
  font-family: var(--font-body);
  font-size: .75rem;
  font-weight: 700;
  color: var(--color-ink-soft);
  text-align: center;
}
@media (hover: none) { .kbd-hints { display: none; } }

/* ---------- Avisos ---------- */
.notice {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 14px;
  border-radius: var(--radius-media);
  background: var(--color-surface-2);
  border: 1px solid var(--color-hairline);
  font-size: .88rem;
  color: var(--color-ink-soft);
}
.notice svg { width: 18px; height: 18px; flex: 0 0 auto; margin-top: 2px; color: var(--color-accent); }
.notice--warn svg { color: var(--color-warn); }

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(24px + env(safe-area-inset-bottom));
  transform: translate(-50%, 20px);
  background: var(--color-ink);
  color: var(--color-bg);
  font-weight: 700;
  font-size: .9rem;
  padding: 10px 18px;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s var(--ease);
  z-index: 50;
  max-width: calc(100vw - 32px);
  text-align: center;
}
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Bloque de texto inferior (cómo usarlo) ---------- */
.tool-notes {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-hairline);
  display: grid;
  gap: var(--space-3) var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.tool-notes h2 { font-size: 1.35rem; }
.tool-notes p, .tool-notes li { color: var(--color-ink-soft); font-size: .95rem; }
.tool-notes ul { padding-left: 1.1em; margin: 0; }
.tool-notes li + li { margin-top: 4px; }
.tool-notes strong { color: var(--color-ink); }

/* ---------- Hub (portada) ---------- */
.hub-hero { text-align: center; max-width: 780px; margin: 0 auto var(--space-5); }
.hub-hero h1 { font-size: clamp(2.3rem, 6vw, 4rem); }
.hub-hero p { font-size: 1.15rem; color: var(--color-ink-soft); margin: 0 auto; max-width: 620px; }
.hub-hero__facts { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 22px; margin-top: var(--space-3); list-style: none; padding: 0; font-size: .85rem; font-weight: 700; color: var(--color-gray); }
.hub-hero__facts li { display: inline-flex; align-items: center; gap: 8px; }
.hub-hero__facts svg { width: 16px; height: 16px; color: var(--color-accent); }

.hub-group { margin-bottom: var(--space-5); }
.hub-group__head { display: flex; align-items: baseline; gap: var(--space-2); border-bottom: 1px solid var(--color-hairline); padding-bottom: 12px; margin-bottom: var(--space-3); }
.hub-group__head h2 { margin: 0; }
.hub-group__head p { margin: 0; color: var(--color-gray); font-size: .9rem; }
@media (max-width: 600px) { .hub-group__head { flex-direction: column; gap: 4px; } }

.hub-grid { display: grid; gap: var(--space-2); grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--space-3);
  border-radius: var(--radius-media);
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  color: var(--color-ink);
  transition: border-color .2s ease, transform .2s var(--ease), background .2s ease;
  min-height: 190px;
}
.tool-card:hover { border-color: var(--color-accent); color: var(--color-ink); transform: translateY(-2px); background: var(--color-surface-2); }
.tool-card__icon { width: 44px; height: 44px; color: var(--color-accent); }
.tool-card__icon svg { width: 100%; height: 100%; }
.tool-card__title { font-family: var(--font-heading); font-weight: 700; font-size: 1.45rem; line-height: 1.15; margin: 4px 0 0; }
.tool-card__desc { font-size: .92rem; color: var(--color-ink-soft); margin: 0; }
.tool-card__arrow { position: absolute; top: var(--space-3); right: var(--space-3); width: 20px; height: 20px; color: var(--color-gray); transition: transform .2s var(--ease), color .2s ease; }
.tool-card:hover .tool-card__arrow { color: var(--color-accent); transform: translate(3px, -3px); }
@media (max-width: 600px) {
  .tool-card { min-height: 0; padding: var(--space-2); flex-direction: row; align-items: flex-start; gap: 14px; }
  .tool-card__icon { width: 36px; height: 36px; flex: 0 0 auto; margin-top: 2px; }
  .tool-card__title { font-size: 1.25rem; margin: 0 0 4px; }
  .tool-card__arrow { display: none; }
}

/* ---------- Footer ---------- */
.site-footer { background: var(--color-footer-bg); border-top: 1px solid var(--color-hairline); padding: var(--space-4) 0 calc(var(--space-4) + env(safe-area-inset-bottom)); color: var(--color-gray); font-size: .88rem; }
.site-footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: var(--space-3); }
.site-footer__brand { font-family: var(--font-heading); font-weight: 700; font-size: 1.6rem; color: var(--color-ink); text-transform: lowercase; letter-spacing: -0.3px; }
.site-footer__brand:hover { color: var(--color-ink); }
.site-footer p { margin: 6px 0 0; max-width: 460px; }
.site-footer__links { display: flex; flex-wrap: wrap; gap: 8px 22px; list-style: none; margin: 0; padding: 0; }
.site-footer__links a { color: var(--color-ink-soft); font-weight: 700; font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; }
.site-footer__links a:hover { color: var(--color-accent); }

/* ---------- Utilidades de animación ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* =========================================================================
   v2 · Más compacto, más táctil
   Sombras suaves, ventanas de info (i) y primera pantalla optimizada:
   en móvil la herramienta tiene que caber casi entera sin hacer scroll.
   ========================================================================= */
:root {
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .35), 0 2px 6px rgba(0, 0, 0, .18);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .28);
  --shadow-glow: 0 1px 2px rgba(0, 0, 0, .3), 0 2px 10px rgba(0, 205, 156, .14);
}

/* Iconos y botones con un relieve mínimo */
.icon-btn, .btn, .seg button, .chip, .stepper__value { box-shadow: var(--shadow-sm); }
.btn--ghost { box-shadow: none; }
.play { box-shadow: var(--shadow-md); }
.play.is-on { box-shadow: 0 0 0 10px var(--color-accent-dim), var(--shadow-md); }
.seg button[aria-pressed="true"], .btn:not(.btn--ghost) { box-shadow: var(--shadow-glow); }
.icon-btn svg, .btn svg, .tool-card__icon svg, .seg button svg { filter: drop-shadow(0 1px 1.5px rgba(0, 0, 0, .45)); }
.stage, .panel { box-shadow: 0 1px 0 rgba(255, 255, 255, .03) inset, 0 10px 30px rgba(0, 0, 0, .22); }

/* ---------- Info (i): ayuda contextual sin ensuciar el diseño ---------- */
.info {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin: -4px 0;
  padding: 0;
  border: 1px solid var(--color-hairline);
  border-radius: 50%;
  background: var(--color-surface-2);
  color: var(--color-gray);
  font-family: var(--font-heading);
  font-weight: 700;
  font-style: italic;
  font-size: .8rem;
  line-height: 1;
  vertical-align: middle;
  box-shadow: var(--shadow-sm);
  transition: color .15s ease, border-color .15s ease, background .15s ease;
  touch-action: manipulation;
  flex: 0 0 auto;
  position: relative;
}
/* Área táctil de 44px sin agrandar el icono */
.info::after { content: ""; position: absolute; inset: -11px; }
.info:hover, .info[aria-expanded="true"] { color: var(--color-accent); border-color: var(--color-accent); background: var(--color-accent-dim); }
.panel__title .info, .field__label .info { margin-left: 6px; }

.info-pop {
  position: fixed;
  z-index: 60;
  max-width: min(320px, calc(100vw - 24px));
  padding: 14px 16px;
  border-radius: var(--radius-media);
  background: #2A2924;
  border: 1px solid #3A3832;
  color: var(--color-ink-soft);
  font-size: .9rem;
  line-height: 1.45;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(4px) scale(.98);
  transform-origin: top center;
  pointer-events: none;
  transition: opacity .15s ease, transform .15s var(--ease);
}
.info-pop.is-open { opacity: 1; transform: none; pointer-events: auto; }
.info-pop strong { display: block; color: var(--color-ink); font-size: .95rem; margin-bottom: 4px; }
.info-pop p { margin: 0; }
.info-pop p + p { margin-top: 6px; }
.info-pop::before {
  content: "";
  position: absolute;
  top: -6px;
  left: var(--arrow, 50%);
  width: 10px; height: 10px;
  background: #2A2924;
  border-left: 1px solid #3A3832;
  border-top: 1px solid #3A3832;
  transform: translateX(-50%) rotate(45deg);
}
.info-pop.is-above::before { top: auto; bottom: -6px; transform: translateX(-50%) rotate(225deg); }

/* ---------- Primera pantalla más compacta ---------- */
.site-main { padding-top: var(--space-3); }
.breadcrumb { margin-bottom: 10px; }
.tool-head { margin-bottom: var(--space-3); }
.tool-head h1 { font-size: clamp(1.9rem, 3.2vw, 2.6rem); margin-bottom: .2em; }
.tool-head__lede { font-size: 1.02rem; }
.tool-notes { margin-top: var(--space-4); padding-top: var(--space-3); }
.tool-notes h2 { font-size: 1.15rem; margin-bottom: .4em; }
.tool-notes p, .tool-notes li { font-size: .9rem; }

@media (max-width: 600px) {
  /* Cabecera: una sola franja fina, no fija, para dejar sitio a la herramienta */
  .site-header { position: relative; }
  .site-header__brand { padding: 8px var(--space-2) 6px; }
  .site-brand__name { font-size: 1.4rem; }
  .site-brand__tag { font-size: .6rem; padding: 3px 7px 2px; transform: translateY(-3px); }
  .tool-nav__list { padding: 7px var(--space-2) 8px; gap: 18px; }
  .tool-nav a { font-size: .72rem; }

  .site-main { padding: 12px 0 var(--space-4); }
  .tool .breadcrumb { display: none; }
  .tool-head { margin-bottom: 12px; }
  .tool-head h1 { font-size: 1.6rem; margin-bottom: 2px; }
  .tool-head__lede { font-size: .88rem; line-height: 1.4; color: var(--color-gray); }

  .stage { padding: var(--space-2) 12px; gap: var(--space-2); }
  .panel { padding: 12px 14px 14px; }
  .panel__head { margin-bottom: 8px; min-height: 28px; }
  .controls { gap: 12px; }
  .tool-layout { gap: 12px; }
  .readout { font-size: clamp(3.6rem, 18vw, 5rem); }
  .play { width: 76px; height: 76px; }
  .play svg { width: 30px; height: 30px; }
  .tool-notes { margin-top: var(--space-3); gap: var(--space-2); }

  /* Portada: tarjetas en dos columnas para ver todo de un vistazo */
  .hub-hero { margin-bottom: var(--space-3); }
  .hub-hero h1 { font-size: 2rem; }
  .hub-hero p { font-size: .95rem; }
  .hub-hero__facts { margin-top: 14px; gap: 6px 14px; font-size: .75rem; }
  .hub-group { margin-bottom: var(--space-3); }
  .hub-group__head { margin-bottom: 12px; padding-bottom: 8px; flex-direction: row; align-items: baseline; gap: 10px; }
  .hub-group__head h2 { font-size: 1.3rem; }
  .hub-group__head p { font-size: .78rem; }
  .hub-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .tool-card { flex-direction: column; gap: 6px; padding: 14px; min-height: 0; }
  .tool-card__icon { width: 30px; height: 30px; margin: 0; }
  .tool-card__title { font-size: 1.08rem; margin: 2px 0 2px; }
  .tool-card__desc { font-size: .78rem; line-height: 1.35; color: var(--color-gray); }
}

/* Pie: lema corto */
.site-footer { padding: var(--space-3) 0 calc(var(--space-3) + env(safe-area-inset-bottom)); }
.site-footer__inner { align-items: center; }
.site-footer p { font-size: .82rem; }

/* Portada compacta: en escritorio se ven al menos dos grupos al entrar */
.hub-hero { margin-bottom: var(--space-4); }
.hub-hero h1 { font-size: clamp(2.2rem, 4.4vw, 3.2rem); margin-bottom: .3em; }
.hub-hero p { font-size: 1.05rem; }
.hub-hero__facts { margin-top: var(--space-2); }
.hub-group { margin-bottom: var(--space-4); }
.hub-group__head { margin-bottom: var(--space-2); }
.tool-card { min-height: 150px; padding: 20px; }
.tool-card__icon { width: 38px; height: 38px; transition: transform .25s var(--ease); }
.tool-card:hover .tool-card__icon { transform: translateY(-2px) scale(1.06); }
.tool-card__desc { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
@media (max-width: 600px) {
  .tool-card__desc { -webkit-line-clamp: 3; }
  /* Cinco herramientas de sonido: la primera ocupa el ancho para no dejar una huérfana */
  #sonido .tool-card:first-child { grid-column: span 2; flex-direction: row; align-items: center; gap: 14px; }
  #sonido .tool-card:first-child .tool-card__icon { width: 36px; height: 36px; }
}
.hub-hero { max-width: 940px; }
@media (max-width: 600px) {
  .tool-card { min-height: 0; padding: 14px; }
}

/* =========================================================================
   Primera pantalla en móvil: la herramienta manda
   La barra de herramientas pasa a un menú desplegable y el encabezado se
   reduce a una línea, para que la función principal quepa completa.
   ========================================================================= */
.mnav-btn, .mnav { display: none; }
@media (max-width: 760px) {
  .site-header { position: sticky; top: 0; }
  .site-header__brand { justify-content: space-between; padding: 6px 8px 6px var(--space-2); }
  .site-brand__name { font-size: 1.3rem; }
  .tool-nav { display: none; }

  .mnav-btn {
    display: inline-grid;
    place-items: center;
    width: 44px; height: 40px;
    border: 0; border-radius: var(--radius);
    background: transparent;
    color: var(--color-ink);
    touch-action: manipulation;
  }
  .mnav-btn__bars { display: grid; gap: 5px; width: 20px; }
  .mnav-btn__bars span { display: block; height: 2px; border-radius: 2px; background: currentColor; transition: transform .25s var(--ease), opacity .2s ease; }
  .mnav-btn[aria-expanded="true"] .mnav-btn__bars span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .mnav-btn[aria-expanded="true"] .mnav-btn__bars span:nth-child(2) { opacity: 0; }
  .mnav-btn[aria-expanded="true"] .mnav-btn__bars span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .mnav {
    display: block;
    position: absolute;
    top: 100%; left: 0; right: 0;
    max-height: calc(100dvh - 52px);
    overflow-y: auto;
    background: rgba(18, 18, 18, .98);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-hairline);
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity .2s ease, transform .2s var(--ease);
  }
  .mnav[hidden] { display: block; visibility: hidden; }
  .mnav.is-open { opacity: 1; transform: none; pointer-events: auto; visibility: visible; }
  .mnav__inner { padding: 10px var(--space-2) var(--space-2); }
  .mnav__group + .mnav__group { margin-top: 12px; }
  .mnav__title { display: block; font-size: .68rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--color-gray); margin: 0 0 6px 2px; }
  .mnav ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; }
  .mnav a:not(.mnav__all) {
    display: flex; align-items: center; gap: 10px;
    min-height: 46px; padding: 6px 10px;
    border-radius: var(--radius-media);
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    color: var(--color-ink);
    font-weight: 700; font-size: .9rem;
    box-shadow: var(--shadow-sm);
  }
  .mnav a[aria-current="page"] { border-color: var(--color-accent); color: var(--color-accent); background: var(--color-accent-dim); }
  .mnav__icon { width: 24px; height: 24px; flex: 0 0 auto; color: var(--color-accent); }
  .mnav__icon svg { width: 100%; height: 100%; }
  .mnav__all { display: block; text-align: center; margin-top: 14px; font-size: .78rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }

  /* Encabezado de herramienta en una sola línea; la entradilla se queda en escritorio */
  .tool .site-main { padding-top: 10px; }
  .tool .tool-head { margin-bottom: 10px; }
  .tool .tool-head h1 { font-size: 1.3rem; margin: 0; line-height: 1.2; }
  .tool .tool-head__lede { display: none; }
}

/* =========================================================================
   v2.1 · Algo más de contraste en las cajas y más aire entre botones
   ========================================================================= */
:root {
  --color-surface: #22211D;
  --color-surface-2: #2A2925;
  --color-surface-3: #35342E;
  --color-hairline: #383631;
}
.stage, .panel, .tool-card { border-color: #3A3833; }
.seg, .chips { gap: 8px; }
.row { gap: 10px; }
.stepper { gap: 10px; }
.controls { gap: var(--space-2); }
.tool-layout { gap: var(--space-3); }
.field + .field { margin-top: 18px; }
@media (max-width: 600px) {
  .controls, .tool-layout { gap: 14px; }
}
/* Grupos de botones propios de cada herramienta (más específico que sus hojas) */
body .chord-roots, body .note-grid, body .tuner-strings, body .poly-presets,
body .drum-ab, body .drum-history, body .drum-brush, body .drum-styles__gen,
body .drum-export, body .drum-pop__btns, body .drum-ptabs, body .drum-top__right,
body .metro-quick__row, body .tone-oct, body .drone-oct, body .routine__tools { gap: 8px; }
body .drum-ms { gap: 5px; }
body .ramp-grid .stepper, body .drone-tune .stepper, body .tone-cents .stepper,
body .tone-a4 .stepper, body .routine__min, body .timer-grid .stepper { gap: 6px; }
body .count-step { gap: 8px; }
@media (max-width: 600px) {
  body .ear-answers { gap: 8px; }
  body .chord-roots { gap: 7px; }
}