/* PRÁCTICA.LIVE — Propuesta v2
   Minimal · Ableton Session View inspired
   Brand: black + gold from logo
*/

:root {
  --bg: #0e0e0e;
  --bg-2: #161616;
  --bg-3: #1c1c1c;
  --bg-4: #242424;
  --line: #2a2a2a;
  --line-2: #3a3a3a;
  --text: #e8e8e8;
  --muted: #8a8a8a;
  --soft: #5c5c5c;
  --gold: #d4af37;
  --gold-dim: rgba(212, 175, 55, 0.15);
  --cyan: #3db8c9;
  --cyan-dim: rgba(61, 184, 201, 0.18);
  --lime: #8bc34a;
  --lime-dim: rgba(139, 195, 74, 0.18);
  --font: "IBM Plex Sans", system-ui, sans-serif;
  --header: 56px;
  --pad: clamp(1rem, 3vw, 2rem);
  --max: 1120px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header) + 1rem);
}

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

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }

/* ——— Transport ——— */
.transport {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header);
  background: #121212;
  border-bottom: 1px solid var(--line);
}

.transport-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
  height: 100%;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.brand-logo {
  height: 28px;
  width: auto;
}

.transport-nav {
  display: flex;
  gap: 0.15rem;
  margin-left: 0.5rem;
}

.transport-nav a {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.35rem 0.65rem;
  border: 1px solid transparent;
}

.transport-nav a:hover {
  color: var(--text);
  border-color: var(--line-2);
  background: var(--bg-3);
}

.transport-meta {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.7rem;
  color: var(--soft);
  font-variant-numeric: tabular-nums;
}

.tempo b { color: var(--text); font-weight: 600; }

.led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 8px var(--gold);
}

.transport-cta {
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--gold);
  color: #0e0e0e;
  padding: 0.45rem 0.9rem;
  border: none;
  cursor: pointer;
}

.transport-cta:hover { filter: brightness(1.08); }
.transport-cta:disabled { opacity: 0.65; cursor: wait; }

body.site-chrome .transport-cta {
  margin-left: auto;
}

.nav-drop {
  position: relative;
}

.nav-drop-btn {
  font: inherit;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.35rem 0.65rem;
  background: none;
  border: 1px solid transparent;
  cursor: pointer;
  appearance: none;
}

.nav-drop-btn::after {
  content: "";
  display: inline-block;
  margin-left: 0.4rem;
  vertical-align: 0.15em;
  border-left: 3.5px solid transparent;
  border-right: 3.5px solid transparent;
  border-top: 4px solid currentColor;
}

.nav-drop-btn:hover,
.nav-drop.is-open .nav-drop-btn,
.nav-drop-btn.is-on {
  color: var(--gold);
}

.nav-drop-menu {
  position: absolute;
  top: calc(100% + 0.35rem);
  left: 0;
  z-index: 140;
  min-width: 10.5rem;
  padding: 0.35rem 0;
  background: #161616;
  border: 1px solid var(--line-2);
}

.nav-drop-menu[hidden] {
  display: none;
}

.nav-drop-menu a {
  display: block;
  padding: 0.45rem 0.85rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav-drop-menu a:hover,
.nav-drop-menu a.is-on {
  color: var(--gold);
}

.transport-nav a.is-on {
  color: var(--gold);
}

html:has(body.site-chrome) {
  scroll-padding-top: calc(var(--header) + 1rem);
}

@media (max-width: 900px) {
  body.site-chrome .transport-nav { display: none; }

  body.site-chrome .nav-toggle {
    display: flex;
  }

  body.site-chrome .transport-nav.open {
    display: flex;
    position: fixed;
    inset: var(--header) 0 auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #121212;
    border-bottom: 1px solid var(--line);
    padding: 0.65rem var(--pad) 0.85rem;
    margin: 0;
  }

  body.site-chrome .transport-nav.open a,
  body.site-chrome .transport-nav.open .nav-drop-btn {
    padding: 0.7rem 0;
  }

  body.site-chrome .transport-nav.open .nav-drop-btn {
    display: none;
  }

  body.site-chrome .transport-nav.open .nav-drop-menu,
  body.site-chrome .transport-nav.open .nav-drop-menu[hidden] {
    display: flex !important;
    flex-direction: column;
    position: static;
    min-width: 0;
    padding: 0 0 0 0.2rem;
    background: none;
    border: none;
  }
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--gold);
}

/* ——— Hero · video banner ——— */
.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: end;
  min-height: calc(100vh - var(--header));
  max-width: none;
  margin: 0;
  padding: 4rem var(--pad) 4.5rem;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-video {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-video iframe {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100vw;
  height: 56.25vw;
  min-height: 100%;
  min-width: 177.78%;
  transform: translate(-50%, -50%);
  border: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(14, 14, 14, 0.92) 0%, rgba(14, 14, 14, 0.72) 42%, rgba(14, 14, 14, 0.45) 100%),
    linear-gradient(to top, var(--bg) 0%, transparent 35%);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 640px;
}

.hero-meta-panel {
  position: relative;
  z-index: 1;
  align-self: end;
  width: 140px;
  border: 1px solid var(--line);
  background: rgba(22, 22, 22, 0.85);
  backdrop-filter: blur(8px);
}

.meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--soft);
}

.meta-row:last-child { border-bottom: none; }

.meta-row b {
  color: var(--text);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.meta-row.led-row .led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 8px var(--gold);
  display: block;
}

.eyebrow {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.lead {
  color: var(--muted);
  font-size: 1rem;
  max-width: 36ch;
  margin-bottom: 2rem;
}

.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

.hero-skool {
  margin: 0 0 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.25rem;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid transparent;
  transition: filter 0.15s, background 0.15s;
  cursor: pointer;
}

.btn-arm {
  background: var(--gold);
  color: #0e0e0e;
}

.btn-arm:hover { filter: brightness(1.08); }

.btn-ghost {
  border-color: var(--line-2);
  color: var(--text);
  background: transparent;
}

.btn-ghost:hover { background: var(--bg-3); }

/* ——— Panels ——— */
.panel {
  max-width: var(--max);
  margin: 0 auto 2rem;
  padding: 0 var(--pad);
}

.panel-flush { padding-left: var(--pad); padding-right: var(--pad); }
.panel-last { margin-bottom: 4rem; }

.panel-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.55rem 0.75rem;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-bottom: none;
}

.panel-label .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 6px var(--gold);
}

.panel-body,
.session,
.rack,
.mixer,
.monitor,
.arm-box {
  border: 1px solid var(--line);
  background: var(--bg-2);
}

/* Monitor · YouTube embed (compact) */
.monitor-chrome {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg-3);
  flex-wrap: wrap;
}

.monitor-tabs {
  display: flex;
  gap: 0.25rem;
}

.monitor-tabs span {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.25rem 0.55rem;
  border: 1px solid transparent;
}

.monitor-tabs .is-on {
  color: #0e0e0e;
  background: var(--gold);
  border-color: var(--gold);
}

.monitor-meta {
  font-size: 0.68rem;
  color: var(--soft);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.monitor-body {
  display: grid;
  grid-template-columns: minmax(0, 420px) 1fr;
  align-items: stretch;
}

.monitor-screen {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 236px;
  background: #000;
  border-right: 1px solid var(--line);
}

.monitor-screen iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.monitor-aside {
  padding: 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.65rem;
  max-width: 42ch;
}

.monitor-aside h2 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.monitor-aside p {
  color: var(--muted);
  font-size: 0.9rem;
}

.monitor-aside .btn {
  align-self: flex-start;
  margin-top: 0.5rem;
}

.arm-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.arm-actions-mail {
  margin-top: 1.25rem;
}

.arm-tagline {
  margin-top: 1rem !important;
  font-size: 0.85rem;
  color: var(--gold) !important;
  letter-spacing: 0.02em;
}

.plan-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  width: min(520px, 100%);
  margin: 0 auto;
  text-align: left;
}

.plan-row-compact {
  width: min(420px, 100%);
}

.plan-option {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 1rem 1.1rem;
  background: var(--bg-3);
  border: 1px solid var(--line-2);
  color: var(--text);
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, background 0.15s, filter 0.15s;
}

.plan-option:hover {
  border-color: var(--gold);
  background: var(--bg-4);
}

.plan-option:disabled {
  opacity: 0.65;
  cursor: wait;
}

.plan-option-featured {
  border-color: var(--gold);
  background: var(--gold-dim);
}

.plan-option-badge {
  position: absolute;
  top: 0.65rem;
  right: 0.75rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #0e0e0e;
  background: var(--gold);
  padding: 0.15rem 0.4rem;
}

.plan-option-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.plan-option-price {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
}

.plan-option-featured .plan-option-price {
  color: var(--gold);
}

.plan-option-meta {
  font-size: 0.8rem;
  color: var(--muted);
}

@media (max-width: 560px) {
  .plan-row {
    grid-template-columns: 1fr;
  }
}

/* Course */
.course-body {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 0;
}

.course-text {
  padding: 2rem;
  border-right: 1px solid var(--line);
}

.course-text h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.course-text p {
  color: var(--muted);
  margin-bottom: 0.85rem;
  max-width: 48ch;
}

.return-tracks {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.return {
  padding: 1.5rem 1.25rem;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.return:last-child { border-right: none; }

.return header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.return-num {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  background: var(--gold);
  color: #0e0e0e;
  font-size: 0.7rem;
  font-weight: 700;
}

.return-name {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--soft);
  font-weight: 600;
}

.return-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.return-desc {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: auto;
}

.meter {
  margin-top: 1.25rem;
  height: 4px;
  background: var(--bg-4);
  position: relative;
}

.meter i {
  display: block;
  height: 100%;
  width: var(--h);
  background: var(--gold);
}

/* Session */
.session {
  display: grid;
  grid-template-columns: 1fr 200px;
}

.session-tracks {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
  padding: 3px;
  background: var(--bg);
}

.session-track {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.session-head {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: center;
  padding: 0.5rem;
  color: #0e0e0e;
  background: var(--gold);
}

.session-head.cyan { background: var(--cyan); }
.session-head.lime { background: var(--lime); }

.session-clip {
  min-height: 52px;
  padding: 0.65rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.35;
  background: var(--gold-dim);
  color: var(--text);
  border: 1px solid transparent;
  display: flex;
  align-items: center;
}

.session-clip.cyan { background: var(--cyan-dim); }
.session-clip.lime { background: var(--lime-dim); }

.session-clip.empty {
  background: var(--bg-3);
  border: 1px solid var(--line);
  min-height: 40px;
}

.matrix-note {
  padding: 1.5rem 1.25rem;
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0.75rem;
}

.matrix-kicker {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
}

.matrix-note p:last-child {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.45;
}

/* Rack — interactive device chain */
.rack {
  padding: 0;
}

.rack-chain {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border-bottom: 1px solid var(--line);
}

.device {
  appearance: none;
  -webkit-appearance: none;
  font: inherit;
  color: inherit;
  cursor: pointer;
  text-align: left;
  padding: 1rem 0.75rem 1.1rem;
  border: none;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  background: var(--bg-3);
  transition: background 0.15s, color 0.15s;
}

.device:last-child { border-right: none; }

.device:hover {
  background: var(--bg-4);
}

.device[aria-selected="true"] {
  background: var(--gold);
  color: #0e0e0e;
  box-shadow: inset 0 2px 0 #f0d56a;
}

.device-icon {
  width: 36px;
  height: 36px;
  margin-bottom: 0.45rem;
  color: var(--gold);
}

.device[aria-selected="true"] .device-icon {
  color: #0e0e0e;
}

.device-num {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--soft);
}

.device[aria-selected="true"] .device-num {
  color: rgba(14, 14, 14, 0.55);
}

.device-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.device-sub {
  font-size: 0.68rem;
  color: var(--muted);
  line-height: 1.3;
}

.device[aria-selected="true"] .device-sub {
  color: rgba(14, 14, 14, 0.7);
}

.rack-stage {
  display: grid;
  grid-template-columns: minmax(280px, 1.05fr) 1fr;
  min-height: 360px;
}

.rack-display {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line);
  background: #121212;
  min-height: 360px;
}

.display-chrome {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg-3);
  flex-shrink: 0;
}

.display-led {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 8px var(--gold);
}

.display-title {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.display-mod {
  margin-left: auto;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.rack-icon-stage {
  position: relative;
  flex: 1;
  min-height: 300px;
  border-right: none;
  background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 28px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 28px 100%,
    #161616;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.stage-glow {
  position: absolute;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.16) 0%, transparent 68%);
  pointer-events: none;
}

.stage-corners {
  position: absolute;
  inset: 1.25rem;
  pointer-events: none;
}

.stage-corners i {
  position: absolute;
  width: 12px;
  height: 12px;
  border-color: var(--gold);
  border-style: solid;
  opacity: 0.55;
}

.stage-corners i:nth-child(1) { top: 0; left: 0; border-width: 2px 0 0 2px; }
.stage-corners i:nth-child(2) { top: 0; right: 0; border-width: 2px 2px 0 0; }
.stage-corners i:nth-child(3) { bottom: 0; left: 0; border-width: 0 0 2px 2px; }
.stage-corners i:nth-child(4) { bottom: 0; right: 0; border-width: 0 2px 2px 0; }

.stage-icon {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 220px;
  height: 220px;
  color: var(--gold);
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.92);
  transition: opacity 0.35s ease, transform 0.35s ease;
  pointer-events: none;
  filter: drop-shadow(0 0 12px rgba(212, 175, 55, 0.25));
  overflow: visible;
}

.stage-icon.is-active {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* Keep centering — never override translate on the root SVG */
.stage-icon-roll.is-active,
.stage-icon-quant.is-active,
.stage-icon-lfo.is-active,
.stage-icon-loop.is-active {
  transform: translate(-50%, -50%) scale(1);
}

.rack-panes {
  position: relative;
  padding: 0;
  display: flex;
  align-items: center;
  background: var(--bg-2);
}

.rack-pane {
  padding: 2.25rem 2rem;
  max-width: 42ch;
}

.rack-pane[hidden] {
  display: none;
}

/* Piano roll — Explain: malla fija, MIDI en movimiento */
.stage-icon-roll .midi-note {
  opacity: 0.85;
}

.stage-icon-roll.is-active .midi-note {
  animation: midi-scroll 4s linear infinite;
  animation-delay: calc(var(--i) * -0.45s);
}

.stage-icon-roll.is-active .roll-playhead {
  animation: playhead-blink 1.2s ease-in-out infinite;
}

@keyframes midi-scroll {
  0% {
    transform: translateX(42px);
    opacity: 0;
  }
  8% {
    opacity: 1;
  }
  85% {
    opacity: 1;
  }
  100% {
    transform: translateX(-78px);
    opacity: 0;
  }
}

@keyframes playhead-blink {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 1; }
}

/* Practice — cuantización Session View (pie loop) */
.stage-icon-quant.is-active .quant-fill {
  /* circumference ≈ 2π·11 ≈ 69.115 */
  animation: quant-pie 2s linear infinite;
}

.stage-icon-quant.is-active .quant-core {
  animation: quant-core-pulse 2s ease-in-out infinite;
}

.stage-icon-quant.is-active .quant-clip {
  animation: quant-clip-flash 2s steps(1, end) infinite;
  animation-delay: calc(var(--i) * 0.5s);
}

@keyframes quant-pie {
  0% { stroke-dashoffset: 69.115; }
  100% { stroke-dashoffset: 0; }
}

@keyframes quant-core-pulse {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}

@keyframes quant-clip-flash {
  0%, 24% { fill: transparent; opacity: 0.5; }
  25%, 49% { fill: currentColor; opacity: 1; }
  50%, 100% { fill: transparent; opacity: 0.5; }
}

/* Group network — se forma (draw-on), malla quieta */
.stage-icon-lfo .lfo-link {
  stroke-dasharray: 80;
  stroke-dashoffset: 80;
  opacity: 0;
}

.stage-icon-lfo.is-active .lfo-link {
  animation: form-link 3.6s ease-in-out infinite;
  animation-delay: calc(0.12s + var(--i) * 0.14s);
}

.stage-icon-lfo .lfo-spoke {
  stroke-dasharray: 50;
  stroke-dashoffset: 50;
}

.stage-icon-lfo.is-active .lfo-spoke {
  animation-name: form-spoke;
  animation-delay: calc(0.85s + var(--i) * 0.1s);
}

.stage-icon-lfo .lfo-node {
  transform-box: fill-box;
  transform-origin: center;
  opacity: 0;
  transform: scale(0.2);
}

.stage-icon-lfo.is-active .lfo-node {
  animation: form-node 3.6s ease-in-out infinite;
  animation-delay: calc(var(--i) * 0.14s);
}

.stage-icon-lfo .lfo-hub {
  transform-box: fill-box;
  transform-origin: center;
  opacity: 0;
  transform: scale(0.2);
}

.stage-icon-lfo.is-active .lfo-hub {
  animation: form-hub 3.6s ease-in-out infinite;
  animation-delay: 0.7s;
}

@keyframes form-node {
  0% {
    opacity: 0;
    transform: scale(0.15);
  }
  12%, 72% {
    opacity: 1;
    transform: scale(1);
  }
  88%, 100% {
    opacity: 0;
    transform: scale(0.15);
  }
}

@keyframes form-hub {
  0%, 15% {
    opacity: 0;
    transform: scale(0.15);
  }
  28%, 72% {
    opacity: 1;
    transform: scale(1.08);
  }
  88%, 100% {
    opacity: 0;
    transform: scale(0.15);
  }
}

@keyframes form-link {
  0% {
    opacity: 0;
    stroke-dashoffset: 80;
  }
  18% {
    opacity: 1;
    stroke-dashoffset: 0;
  }
  72% {
    opacity: 1;
    stroke-dashoffset: 0;
  }
  90%, 100% {
    opacity: 0;
    stroke-dashoffset: 80;
  }
}

@keyframes form-spoke {
  0%, 10% {
    opacity: 0;
    stroke-dashoffset: 50;
  }
  28% {
    opacity: 0.95;
    stroke-dashoffset: 0;
  }
  72% {
    opacity: 0.95;
    stroke-dashoffset: 0;
  }
  90%, 100% {
    opacity: 0;
    stroke-dashoffset: 50;
  }
}

/* Continuidad — el loop sigue girando y el material se acumula */
.stage-icon-loop .loop-spin {
  transform-box: view-box;
  transform-origin: 60px 60px;
}

.stage-icon-loop.is-active .loop-spin {
  animation: loop-spin 7s linear infinite;
}

.stage-icon-loop .loop-node {
  transform-box: fill-box;
  transform-origin: center;
  opacity: 0.2;
}

.stage-icon-loop.is-active .loop-node {
  animation: loop-node 7s ease-in-out infinite;
  animation-delay: calc(var(--i) * 1.75s);
}

.stage-icon-loop .loop-bar {
  transform-box: fill-box;
  transform-origin: 50% 100%;
  transform: scaleY(0.2);
}

.stage-icon-loop.is-active .loop-bar {
  animation: loop-bar 7s ease-in-out infinite;
  animation-delay: calc(var(--i) * 0.45s);
}

@keyframes loop-spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes loop-node {
  0% {
    opacity: 0.2;
    transform: scale(0.6);
  }
  6%, 18% {
    opacity: 1;
    transform: scale(1);
  }
  34%, 100% {
    opacity: 0.2;
    transform: scale(0.6);
  }
}

@keyframes loop-bar {
  0% {
    transform: scaleY(0.2);
  }
  30%, 72% {
    transform: scaleY(1);
  }
  100% {
    transform: scaleY(0.2);
  }
}

.device[data-module="group"][aria-selected="true"] .device-icon,
.device[data-module="explain"][aria-selected="true"] .device-icon,
.device[data-module="practice"][aria-selected="true"] .device-icon,
.device[data-module="community"][aria-selected="true"] .device-icon {
  animation: form-tab-pulse 3.6s ease-in-out infinite;
}

@keyframes form-tab-pulse {
  0%, 100% { opacity: 0.55; }
  40%, 70% { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .stage-icon-lfo.is-active .lfo-node,
  .stage-icon-lfo.is-active .lfo-hub,
  .stage-icon-lfo.is-active .lfo-link,
  .stage-icon-lfo.is-active .lfo-spoke,
  .stage-icon-roll.is-active .midi-note,
  .stage-icon-roll.is-active .roll-playhead,
  .stage-icon-quant.is-active .quant-fill,
  .stage-icon-quant.is-active .quant-core,
  .stage-icon-quant.is-active .quant-clip,
  .stage-icon-loop.is-active .loop-spin,
  .stage-icon-loop.is-active .loop-node,
  .stage-icon-loop.is-active .loop-bar,
  .device[data-module="group"][aria-selected="true"] .device-icon,
  .device[data-module="explain"][aria-selected="true"] .device-icon,
  .device[data-module="practice"][aria-selected="true"] .device-icon,
  .device[data-module="community"][aria-selected="true"] .device-icon {
    animation: none;
    opacity: 1;
    transform: none;
    stroke-dashoffset: 0;
  }
}

.pane-kicker {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.rack-pane h2 {
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
  line-height: 1.25;
}

.rack-pane p {
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.rack-pane .highlight {
  color: var(--text);
  border-left: 2px solid var(--gold);
  padding-left: 0.85rem;
  margin-top: 1rem;
}

/* Mixer */
.mixer {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  margin-bottom: 0;
}

.channel {
  padding: 1.25rem 1rem 1.5rem;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
  text-align: center;
}

.channel:last-child { border-right: none; }

.channel.master { background: var(--gold-dim); }

.ch-label {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--soft);
}

.ch-value {
  font-size: 0.85rem;
  font-weight: 600;
  min-height: 2.4em;
  display: flex;
  align-items: center;
}

.fader {
  width: 8px;
  height: 80px;
  background: var(--bg-4);
  position: relative;
  margin-top: 0.5rem;
}

.fader i {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--h);
  background: var(--cyan);
}

.fader.gold i { background: var(--gold); }

.arm-box {
  margin-top: -1px;
  text-align: center;
  padding: 3rem 1.5rem;
}

.arm-logo {
  height: 48px;
  width: auto;
  margin: 0 auto 1.25rem;
}

.arm-box h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.arm-box p {
  color: var(--muted);
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

/* Footer */
.footer {
  border-top: 1px solid var(--line);
  padding: 2rem var(--pad);
  text-align: center;
}

.footer-logo {
  height: 36px;
  width: auto;
  margin: 0 auto 0.75rem;
}

.footer p {
  font-size: 0.75rem;
  color: var(--soft);
  letter-spacing: 0.04em;
}

/* ——— Responsive ——— */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: 70vh;
    padding-top: 3rem;
    align-items: end;
  }

  .hero-meta-panel { display: none; }

  .course-body { grid-template-columns: 1fr; }
  .course-text { border-right: none; border-bottom: 1px solid var(--line); }

  .session { grid-template-columns: 1fr; }
  .matrix-note {
    border-left: none;
    border-top: 1px solid var(--line);
  }

  .rack-chain { grid-template-columns: repeat(3, 1fr); }
  .device:nth-child(3) { border-right: none; }
  .device:nth-child(n+4) { border-top: 1px solid var(--line); }
  .rack-stage {
    grid-template-columns: 1fr;
  }
  .rack-display {
    border-right: none;
    border-bottom: 1px solid var(--line);
    min-height: 280px;
  }
  .rack-icon-stage { min-height: 240px; }
  .stage-icon {
    width: 180px;
    height: 180px;
  }

  .mixer { grid-template-columns: repeat(3, 1fr); }
  .channel:nth-child(3) { border-right: none; }
  .channel:nth-child(n+4) { border-top: 1px solid var(--line); }
  .channel:nth-child(5) { border-right: none; grid-column: span 1; }
}

@media (max-width: 700px) {
  .transport-nav,
  .transport-meta { display: none; }

  .transport-nav.open {
    display: flex;
    position: fixed;
    inset: var(--header) 0 auto;
    flex-direction: column;
    background: #121212;
    border-bottom: 1px solid var(--line);
    padding: 0.5rem;
    margin: 0;
  }

  .nav-toggle { display: flex; margin-left: auto; }
  .transport-cta { display: none; }
  body.site-chrome .transport-cta { display: inline-block; }
  body.site-chrome .nav-toggle { margin-left: 0.65rem; }

  .monitor-body {
    grid-template-columns: 1fr;
  }

  .monitor-screen {
    max-height: none;
    border-right: none;
    border-bottom: 1px solid var(--line);
  }

  .monitor-aside {
    max-width: none;
  }

  .session-tracks { grid-template-columns: 1fr; }

  .rack-chain { grid-template-columns: 1fr 1fr; }
  .device { border-right: 1px solid var(--line); }
  .device:nth-child(even) { border-right: none; }
  .device:nth-child(n+3) { border-top: 1px solid var(--line); }
  .rack-stage { grid-template-columns: 1fr; }
  .rack-display {
    border-right: none;
    border-bottom: 1px solid var(--line);
    min-height: 260px;
  }
  .rack-icon-stage {
    border-right: none;
    min-height: 220px;
  }
  .stage-icon {
    width: 160px;
    height: 160px;
  }

  .mixer { grid-template-columns: repeat(2, 1fr); }
  .channel:nth-child(2n) { border-right: none; }
  .channel:nth-child(n+3) { border-top: 1px solid var(--line); }
  .channel.master { grid-column: 1 / -1; }

  .return-tracks { grid-template-columns: 1fr; }
  .return { border-right: none; border-bottom: 1px solid var(--line); }
  .return:last-child { border-bottom: none; }
}

/* ——— Checkout status pages ——— */
.status-page {
  min-height: calc(100vh - var(--header) - 120px);
  display: flex;
  align-items: center;
  padding: clamp(2rem, 6vw, 4rem) var(--pad);
}

.status-panel {
  width: min(720px, 100%);
  margin: 0 auto;
}

.status-body {
  padding: clamp(1.75rem, 4vw, 2.75rem);
}

.status-kicker {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.status-body h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.status-body .lead {
  color: var(--muted);
  max-width: 42ch;
  margin-bottom: 1.75rem;
}

.status-dot-ok { background: var(--lime); }
.status-dot-pending { background: var(--gold); }
.status-dot-fail { background: #c45c5c; }

.checkout-error {
  margin-top: 1rem;
  color: #e08080;
  font-size: 0.9rem;
}

button.btn {
  border: none;
  cursor: pointer;
  font: inherit;
}

button.btn:disabled {
  opacity: 0.65;
  cursor: wait;
}