:root {
  --gold: #f3d67a;
  --gold-dim: #d9b85c;
  --gold-border: rgba(232,201,106,0.4);
  --bg: #0a0a08;
  --surface: #131310;
  --surface2: #1a1a16;
  --text: #fffaf0;
  --text-body: #ebdcc5;
  --text-dim: #c2b79e;
  --border: rgba(232,201,106,0.3);
  --green: #4caf50;
  --green-bg: rgba(76,175,80,0.12);
  --red: #ef5350;
  --red-bg: rgba(239,83,80,0.12);
  --focus: #ffdd44;
  --radius: 4px;
}

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

#btn-stop-all {
  position: fixed !important;
  bottom: 24px;
  right: 16px;
  z-index: 9999;
  margin-left: 0 !important;
  box-shadow: 0 4px 20px rgba(0,0,0,0.6);
  background: rgba(220,60,60,0.15);
  color: #e07070;
  border: 1px solid rgba(220,60,60,0.35);
  border-radius: 6px;
  padding: 10px 18px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  font-family: 'Cinzel', serif;
  white-space: nowrap;
  transition: background 0.2s, color 0.2s;
}
#btn-stop-all:hover {
  background: rgba(220,60,60,0.3);
  color: #ff9090;
}
html { scroll-behavior: smooth; }

body {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 19px;
  line-height: 1.7;
  background: var(--bg);
  color: var(--text-body);
}

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

body::before {
  content:'';
  position:fixed; inset:0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events:none; z-index:0; opacity:0.3;
}

/* Skip link */
.skip-link {
  position: absolute; top: -100px; left: 0;
  background: var(--focus); color: #000;
  font-size: 1rem; font-weight: 600; padding: 12px 24px;
  z-index: 9999; border-radius: 0 0 var(--radius) 0; text-decoration: none;
}
.skip-link:focus { top: 0; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Nav */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,10,8,0.95); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  text-align: center;
  padding: 0;
}
.site-nav-inner {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  width: 100%;
  justify-content: flex-start;
  padding: 8px 12px;
}
@media (min-width: 900px) {
  .site-nav-inner {
    flex-wrap: wrap;
    overflow-x: visible;
    justify-content: center;
    gap: 2px;
  }
}
.site-nav-inner::-webkit-scrollbar {
  display: none;
}
.nav-link {
  font-family: 'Cinzel', serif;
  font-size: clamp(0.82rem, 1.1vw, 0.95rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text);
  text-decoration: none;
  padding: 10px 12px;
  white-space: nowrap;
  flex: 0 0 auto;
  border-bottom: 2px solid transparent;
  transition: color 0.2s;
}
.nav-link:hover, .nav-link:focus-visible { color: var(--gold); border-bottom-color: var(--gold); }
.nav-link-highlight { color: #e8c96a !important; border-bottom: 1px solid rgba(232,201,106,0.4); }
.nav-intro-btn { background: none; border: 1px solid rgba(232,201,106,0.35); border-radius: 4px; cursor: pointer; padding: 10px 12px; color: var(--text); font-family: 'Cinzel', serif; font-size: clamp(0.82rem, 1.1vw, 0.95rem); font-weight: 600; letter-spacing: 0.06em; }

.access-guide {
  background: rgba(232,201,106,0.05);
  border-bottom: 1px solid rgba(232,201,106,0.12);
  padding: 12px 24px;
  font-size: 0.9rem;
  color: rgba(232,201,106,0.75);
  max-width: 100%;
}
.access-guide-summary {
  margin: 0 0 4px 0;
  line-height: 1.6;
}
.access-guide kbd {
  display: inline-block;
  background: rgba(232,201,106,0.1);
  border: 1px solid rgba(232,201,106,0.25);
  border-radius: 3px;
  padding: 1px 6px;
  font-size: 0.82rem;
  font-family: 'IBM Plex Mono', monospace;
  color: rgba(232,201,106,0.9);
}
.access-guide details {
  margin-top: 6px;
}
.access-guide details summary {
  cursor: pointer;
  color: rgba(232,201,106,0.6);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  user-select: none;
}
.access-guide details summary:hover {
  color: var(--gold);
}
.access-guide details ul {
  margin: 10px 0 4px 0;
  padding-left: 1.2em;
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: rgba(232,201,106,0.7);
  line-height: 1.55;
}
.access-guide details li strong {
  color: rgba(232,201,106,0.95);
}
.access-guide details li em {
  color: rgba(232,201,106,0.5);
  font-style: italic;
}
.access-guide-feedback {
  margin-top: 12px;
  font-size: 0.85rem;
  color: rgba(168,158,136,0.8);
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.access-guide-feedback a {
  color: rgba(232,201,106,0.8);
  text-decoration: underline;
}

/* Hero */
.hero {
  min-height: 60vh; display: flex; flex-direction: column; align-items: center;
  justify-content: center; text-align: center; padding: 32px 24px 40px;
  background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(232,201,106,0.07) 0%, transparent 70%);
  border-bottom: 1px solid var(--border);
}
.hero-eyebrow {
  font-family: 'Cinzel', serif; font-size: 0.78rem; letter-spacing: 0.3em;
  color: var(--gold-dim); text-transform: uppercase; margin-bottom: 32px;
  font-weight: 600;
}
.hero-title {
  font-family: 'Cinzel', serif; font-size: clamp(3.5rem, 12vw, 8rem); font-weight: 600;
  letter-spacing: 0.25em; color: var(--gold); line-height: 1; margin-bottom: 16px;
  text-shadow: 0 0 80px rgba(232,201,106,0.35);
}
.hero-sub {
  font-family: 'Cinzel', serif; font-size: clamp(0.75rem, 2vw, 0.9rem);
  letter-spacing: 0.28em; color: var(--text-dim); text-transform: uppercase;
  margin-bottom: 64px;
}
.bridge-phrase {
  font-family: 'Cinzel', serif; font-size: 0.85rem; letter-spacing: 0.2em;
  margin: -20px 0 32px 0; color: var(--gold-dim); text-align: center;
}

/* Stats */
.stats-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px;
  background: var(--border); border: 1px solid var(--border);
  margin-bottom: 32px; max-width: 520px; width: 100%;
}
.stat { background: var(--bg); padding: 20px 16px; text-align: center; }
.stat-value {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(1.6rem, 6vw, 2.8rem);
  font-weight: 400; color: var(--gold); line-height: 1; display: block;
  white-space: nowrap;
}
.stat-label {
  font-size: clamp(0.58rem, 2vw, 0.78rem);
  letter-spacing: 0.08em; color: var(--text-body);
  text-transform: uppercase; margin-top: 8px;
  white-space: normal; word-break: break-word;
  line-height: 1.4;
}
@media (max-width: 420px) {
  .stat { padding: 16px 10px; }
  .stat-value { font-size: 1.5rem; }
  .stat-label { font-size: 0.55rem; letter-spacing: 0.04em; }
}

/* Formula block */
.formula-block {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  margin-bottom: 40px; max-width: 520px; width: 100%;
  padding: 14px 20px;
  border: 1px solid var(--gold-border);
  border-radius: var(--radius);
  background: rgba(232,201,106,0.04);
  overflow-x: auto;
}
.formula-text {
  font-family: 'Cormorant Garamond', serif; font-size: 1.35rem; font-weight: 400;
  color: var(--gold); letter-spacing: 0.05em; line-height: 1.3;
  word-break: break-word; overflow-wrap: break-word;
  text-align: center; max-width: 100%;
}
@media (max-width: 480px) {
  .formula-text { font-size: 1rem; letter-spacing: 0.02em; }
  .formula-block { padding: 12px 14px; }
}
.formula-sub {
  font-family: 'Cinzel', serif; font-size: 0.7rem; letter-spacing: 0.2em;
  color: var(--text-dim); text-transform: uppercase;
  word-break: break-word; overflow-wrap: break-word;
  text-align: center; max-width: 100%;
}

.hero-desc {
  max-width: 560px; font-size: 1.1rem; line-height: 1.85;
  color: var(--text-body); margin-bottom: 48px;
}
.hero-desc strong { color: var(--text); }

.scale-bar { width: 100%; max-width: 520px; margin: 0 auto; }
.scale-bar-track {
  height: 4px;
  background: linear-gradient(to right, #1a1a1a, #4a3f20, var(--gold), #e8c97a, #fff5d0);
  border-radius: 2px; margin-bottom: 14px;
}
.scale-bar-labels {
  display: flex; justify-content: space-between;
  font-size: 0.82rem; letter-spacing: 0.1em;
  color: var(--text-dim); text-transform: uppercase;
}

/* Sections */
.section-header { text-align: center; padding: 72px 24px 48px; }
.section-label {
  font-family: 'Cinzel', serif; font-size: 0.78rem; letter-spacing: 0.35em;
  color: var(--gold-dim); text-transform: uppercase; margin-bottom: 14px;
  display: block;
}
.section-title {
  font-family: 'Cormorant Garamond', serif; font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 400; font-style: italic; color: var(--text);
}

/* Gallery */
.gallery {
  display: grid !important;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 18px;
}
.card { width: 100%; max-width: none !important; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); transition: border-color 0.3s; }
.card:hover, .card:focus-within { border-color: rgba(232,201,106,0.45); }
.card-number-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px 10px; border-bottom: 1px solid var(--border);
}
.card-num { font-family: 'Cinzel', serif; font-size: 0.82rem; letter-spacing: 0.2em; color: var(--gold-dim); }
.chroma-level {
  font-family: 'Cinzel', serif; font-size: 0.72rem; letter-spacing: 0.18em;
  padding: 4px 12px; border-radius: 2px; text-transform: uppercase; font-weight: 600;
}
.chroma-bar-wrap { padding: 0 20px; margin-top: 10px; margin-bottom: 2px; }
.chroma-bar {
  height: 3px; border-radius: 2px; transition: width 0.8s ease;
}
.card-image {
  width: 100%;
  height: auto;
  max-height: 520px;
  object-fit: contain;
  background: #0a0a08;
  filter: brightness(0.92) saturate(0.9); transition: filter 0.4s; margin-top: 16px;
}
.card:hover .card-image, .card:focus-within .card-image { filter: brightness(1) saturate(1.05); }
.card-body { padding: 22px 22px 18px; display: flex; flex-direction: column; }
.card-artist { font-family: 'Cinzel', serif; font-size: 1.15rem; font-weight: 600; color: var(--text); margin-bottom: 4px; order: -2; }
.card-work { font-family: 'Cormorant Garamond', serif; font-style: italic; font-size: 1.05rem; color: var(--gold-dim); margin-bottom: 12px; order: -1; }
.card-desc { font-size: 1rem; color: var(--text-body); line-height: 1.7; margin-bottom: 16px; }
.sound-profile {
  display: none;
  background: rgba(232,201,106,0.06); border: 1px solid var(--gold-border);
  border-radius: var(--radius); padding: 14px 16px; margin-bottom: 16px;
}
.card:hover .sound-profile, .card:focus-within .sound-profile { display: block; }
@media (max-width: 768px) { .sound-profile { display: block; } }
.sound-profile-title {
  color: var(--gold); font-family: 'Cinzel', serif; font-size: 0.72rem;
  letter-spacing: 0.15em; text-transform: uppercase; display: block; margin-bottom: 6px;
}
.audio-wrap {
  width: 100%; margin-top: 10px; padding: 10px 14px 10px;
  background: rgba(232,201,106,0.05); border: 1.5px solid rgba(232,201,106,0.22);
  border-radius: 20px; box-sizing: border-box;
  display: flex; flex-direction: column; align-items: stretch; gap: 4px;
}
.audio-label {
  display: block; text-align: center;
  font-size: 0.72rem; font-family: 'Cinzel', serif;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--gold-dim);
}
audio { width: 100%; height: 40px; display: block; border-radius: 10px; }
.card-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.tag {
  font-size: 0.82rem; padding: 5px 11px; border-radius: 2px;
  background: rgba(232,201,106,0.07); border: 1px solid var(--gold-border); color: var(--text-dim);
}

/* Speak button */
.speak-btn {
  display: flex; align-items: center; justify-content: center;
  gap: 10px; width: 100%; margin-top: 20px; padding: 12px 16px;
  font-size: 1rem; font-weight: 600; font-family: 'Cinzel', serif;
  background: rgba(232,201,106,0.1); border: 1.5px solid var(--gold-dim);
  border-radius: 48px; color: var(--gold); transition: all 0.2s; cursor: pointer;
}
.speak-btn:hover, .speak-btn:focus-visible { background: var(--gold); color: #000; transform: scale(1.02); }
.speak-btn.speaking { background: var(--gold); color: #000; border-color: white; }

/* Test auditivo */
.divider {
  max-width: 720px; margin: 0 auto; padding: 0 16px;
  display: flex; align-items: center; gap: 16px; margin-bottom: 64px;
}
.divider-line { flex:1; height:1px; background: var(--border); }
.divider-text {
  font-family: 'Cinzel', serif; font-size: 0.72rem; letter-spacing: 0.3em;
  color: var(--gold-dim); text-transform: uppercase; white-space: nowrap;
}
.test-section { max-width: 720px; margin: 0 auto; padding: 0 16px 80px; }
.test-intro {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 28px; margin-bottom: 4px;
  font-size: 1.05rem; text-align: center;
}
.test-pair {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 4px; overflow: hidden;
}
.test-pair-header {
  padding: 16px 22px; border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}
.test-pair-num { font-family: 'Cinzel', serif; font-size: 0.82rem; letter-spacing: 0.18em; color: var(--gold-dim); font-weight: 600; }
.test-pair-status[data-state="correct"] { color: var(--green); font-weight: 600; }
.test-pair-status[data-state="wrong"]   { color: var(--red);   font-weight: 600; }
.test-players {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border);
}
.test-player { background: var(--surface2); padding: 22px 18px; text-align: center; }
.test-player-label {
  font-family: 'Cinzel', serif; font-size: 0.82rem; letter-spacing: 0.18em;
  color: var(--gold); margin-bottom: 14px; font-weight: 600;
}
.test-question { padding: 20px 22px; border-top: 1px solid var(--border); text-align: center; }
.test-question p { font-family: 'Cormorant Garamond', serif; font-size: 1.4rem; color: var(--text); margin-bottom: 18px; font-style: italic; }
.test-buttons { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.test-btn {
  font-family: 'Cinzel', serif; font-size: 0.95rem; letter-spacing: 0.14em;
  padding: 16px 28px; border: 2px solid var(--border); background: transparent;
  color: var(--text); cursor: pointer; text-transform: uppercase;
  border-radius: var(--radius); min-width: 120px; font-weight: 600; transition: all 0.2s;
}
.test-btn:hover:not(:disabled) { border-color: var(--gold); color: var(--gold); background: rgba(232,201,106,0.06); }
.test-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.test-btn.correct { border-color: var(--green); color: var(--green); background: var(--green-bg); }
.test-btn.wrong   { border-color: var(--red);   color: var(--red);   background: var(--red-bg); }
.test-reveal { display: none; border-top: 1px solid var(--border); gap: 1px; background: var(--border); }
.test-reveal.show { display: grid; grid-template-columns: 1fr 1fr; }
.reveal-item { background: var(--surface); padding: 14px; text-align: center; }
.reveal-item img { width: 100%; aspect-ratio: 4/3; object-fit: cover; margin-bottom: 10px; border-radius: 2px; }
.reveal-item-label { font-size: 0.88rem; color: var(--text-body); line-height: 1.5; }
.reveal-item-label strong { display: block; color: var(--text); margin-bottom: 2px; font-size: 0.92rem; }
.reveal-item-label span { display: block; font-style: italic; }
.score-panel {
  display: none; background: var(--surface);
  border: 2px solid rgba(232,201,106,0.35); border-radius: var(--radius);
  padding: 52px 28px; text-align: center; margin-top: 4px;
}
.score-panel.show { display: block; }
.score-number { font-family: 'Cormorant Garamond', serif; font-size: 5rem; font-weight: 300; color: var(--gold); line-height: 1; margin-bottom: 10px; }
.score-label { font-family: 'Cinzel', serif; font-size: 0.82rem; letter-spacing: 0.25em; color: var(--text-dim); text-transform: uppercase; margin-bottom: 24px; }
.score-message { font-family: 'Cormorant Garamond', serif; font-size: 1.25rem; font-style: italic; color: var(--text-body); max-width: 420px; margin: 0 auto; }
.reset-test-btn {
  margin-top: 28px; background: transparent;
  border: 2px solid var(--gold-dim); color: var(--gold-dim);
  padding: 10px 20px; border-radius: 60px;
  font-family: 'Cinzel', serif; font-weight: bold; cursor: pointer; transition: all 0.2s;
}
.reset-test-btn:hover { background: var(--gold-dim); color: #000; }

/* Scatter plot */
.scatter-section { max-width: 720px; margin: 0 auto; padding: 0 16px 56px; }
.scatter-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 24px;
}
.scatter-eyebrow {
  font-family: 'Cinzel', serif; font-size: 0.7rem; letter-spacing: 0.3em;
  color: var(--gold-dim); text-transform: uppercase; display: block; margin-bottom: 12px;
}
.scatter-title {
  font-family: 'Cormorant Garamond', serif; font-size: 1.4rem; font-style: italic;
  font-weight: 300; color: var(--text); margin-bottom: 8px;
}
.scatter-desc {
  font-size: 0.93rem; color: var(--text-dim); margin-bottom: 20px; line-height: 1.6;
}
.scatter-svg-wrap { width: 100%; overflow-x: auto; }
.scatter-svg-wrap svg { display: block; margin: 0 auto; max-width: 100%; }
.scatter-caption {
  font-size: 0.82rem; color: var(--text-dim); text-align: center;
  margin-top: 14px; font-style: italic; letter-spacing: 0.04em;
}

/* Footer */
footer { border-top: 1px solid var(--border); padding: 48px 24px 96px; text-align: center; }
.footer-title { font-family: 'Cinzel', serif; font-size: 0.82rem; letter-spacing: 0.3em; color: var(--gold-dim); text-transform: uppercase; margin-bottom: 14px; }
.footer-text { font-size: 0.9rem; color: var(--text-dim); line-height: 1.9; }
.footer-doi {
  display: inline-block; margin-top: 20px; font-family: 'Cinzel', serif;
  font-size: 0.78rem; letter-spacing: 0.14em; color: var(--gold);
  border: 1px solid rgba(232,201,106,0.35); padding: 10px 22px;
  text-decoration: none; border-radius: var(--radius);
}
.footer-doi:hover { background: rgba(232,201,106,0.08); }

/* Analizador link */
.analizador-link {
  display: inline-block;
  padding: 14px 36px;
  border: 1px solid rgba(232,201,106,0.6);
  color: #e8c96a;
  font-family: 'Cinzel', serif;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-decoration: none;
  text-transform: uppercase;
  transition: background 0.2s;
}
.analizador-link:hover,
.analizador-link:focus-visible {
  background: rgba(232,201,106,0.08);
}

/* Upload zone */
#tu-upload-zone {
  display: block;
  border: 2px dashed var(--gold-border);
  border-radius: var(--radius);
  padding: 36px 24px;
  text-align: center;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  margin-bottom: 24px;
}
#tu-upload-zone:hover,
#tu-upload-zone:focus-within {
  background: rgba(232,201,106,0.06);
  border-color: var(--gold-dim);
}
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); }

/* Accesibilidad intro */
.access-intro { max-width: 720px; margin: 0 auto; padding: 48px 16px 0; }
.access-box { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 24px; }
.access-eyebrow { font-family: 'Cinzel', serif; font-size: 0.7rem; letter-spacing: 0.3em; color: var(--gold-dim); text-transform: uppercase; display: block; margin-bottom: 14px; }
.access-title { font-family: 'Cormorant Garamond', serif; font-size: clamp(1.6rem,4vw,2.1rem); font-style: italic; font-weight: 400; color: var(--text); margin-bottom: 18px; }
.access-body { font-size: 1.1rem; color: var(--text-body); line-height: 1.85; margin-bottom: 22px; }
.access-uses { list-style: none; margin-bottom: 22px; border-top: 1px solid var(--border); padding-top: 18px; }
.access-uses li { padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 1rem; color: var(--text-dim); line-height: 1.7; }
.access-uses strong { color: var(--gold); font-family: 'Cinzel', serif; font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; display: block; margin-bottom: 3px; }
.access-faq { border-top: 1px solid var(--border); padding-top: 18px; margin-top: 4px; }
.access-faq-title { font-family: 'Cinzel', serif; font-size: 0.7rem; letter-spacing: 0.2em; color: var(--gold-dim); text-transform: uppercase; display: block; margin-bottom: 14px; }
.faq-item { margin-bottom: 12px; border: 1px solid var(--border); border-radius: 6px; background: rgba(232,201,106,0.03); transition: background 0.2s, border-color 0.2s; }
.faq-item[open] { background: rgba(232,201,106,0.07); border-color: var(--gold-border); }
.faq-q {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.8rem 1rem; border-radius: 6px; outline: none; user-select: none;
  font-weight: 600; color: var(--text); cursor: pointer;
}
.faq-q:hover { color: var(--gold); }
.faq-q:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }
.faq-q::after {
  content: ''; display: block; flex-shrink: 0;
  width: 20px; height: 20px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none' stroke='%23e8c96a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='5 8 10 13 15 8'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: center;
  transition: transform 0.25s ease;
}
details[open] > .faq-q::after { transform: rotate(180deg); }
.faq-a { padding: 0 1rem 0.85rem 1rem; line-height: 1.6; font-style: italic; color: var(--text-body); }

/* Shelving panel (lupa + analiza tu imagen) */
.shelving-panel {
  background: rgba(232,201,106,0.04);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 16px;
}
.param-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.param-row label {
  font-family: 'Cinzel', serif;
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  flex-shrink: 0;
}
.param-row input[type="range"] {
  flex: 1;
  accent-color: var(--gold);
  cursor: pointer;
  min-width: 0;
}
.shelving-indicator {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 10px;
}
.shelving-indicator-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(to right, var(--gold-dim), var(--gold));
  border-radius: 2px;
  transition: width 0.2s ease;
}
.shelving-note {
  font-family: 'Cinzel', serif;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-align: right;
}

/* Lightbox */
.lightbox-overlay {
  display: none;
  position: fixed; inset: 0; z-index: 9000;
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(6px);
  align-items: center; justify-content: center;
  cursor: zoom-out;
}
.lightbox-overlay.open { display: flex; animation: lb-in 0.22s ease; }
@keyframes lb-in { from { opacity: 0; } to { opacity: 1; } }
.lightbox-img {
  max-width: 94vw;
  max-height: 92vh;
  object-fit: contain;
  border-radius: 2px;
  box-shadow: 0 0 80px rgba(0,0,0,0.8);
  cursor: default;
  user-select: none;
}
.lightbox-caption {
  position: absolute;
  bottom: 20px; left: 50%; transform: translateX(-50%);
  font-family: 'Cinzel', serif; font-size: 0.72rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: rgba(232,201,106,0.75);
  white-space: nowrap; pointer-events: none;
  text-shadow: 0 1px 6px #000;
}
.lightbox-close {
  position: absolute; top: 18px; right: 22px;
  background: none; border: none; cursor: pointer;
  color: rgba(232,201,106,0.6); font-size: 1.6rem; line-height: 1;
  padding: 4px 8px; transition: color 0.15s;
}
.lightbox-close:hover { color: var(--gold); }

/* Botón Ver grande */
.lb-trigger-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  font-family: 'Cinzel', serif;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: zoom-in;
  transition: color 0.2s, border-color 0.2s;
  margin-bottom: 14px;
}
.lb-trigger-btn:hover, .lb-trigger-btn:focus-visible {
  color: var(--gold);
  border-color: var(--gold-border);
  outline: none;
}
.card-image { cursor: default; }

/* Botones espaciales (🦯, 🕐, 🎵) */
.argira-spatial-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  margin-top: 10px;
  padding: 12px 16px;
  min-height: 44px;
  font-family: 'Cinzel', serif;
  font-size: 0.88rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  background: rgba(232,201,106,0.05);
  border: 1.5px solid rgba(232,201,106,0.22);
  border-radius: 48px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.argira-spatial-btn:hover,
.argira-spatial-btn:focus-visible {
  background: rgba(232,201,106,0.12);
  border-color: var(--gold-dim);
  color: var(--gold);
}
.argira-spatial-btn[aria-pressed="true"] {
  background: rgba(232,201,106,0.18);
  color: var(--gold);
  border-color: var(--gold);
}
/* Variantes de color para diferenciar acciones */
.argira-scan-btn {
  border-color: rgba(100, 210, 220, 0.35) !important;
  color: rgba(140, 230, 240, 0.85) !important;
}
.argira-scan-btn:hover,
.argira-scan-btn:focus-visible {
  background: rgba(100, 210, 220, 0.1) !important;
  border-color: rgba(100, 210, 220, 0.6) !important;
  color: rgb(160, 240, 250) !important;
}
.argira-scan-btn[aria-pressed="true"] {
  background: rgba(100, 210, 220, 0.15) !important;
  border-color: rgba(100, 210, 220, 0.7) !important;
}
.argira-sonify-btn {
  border-color: rgba(220, 130, 200, 0.35) !important;
  color: rgba(240, 160, 220, 0.85) !important;
}
.argira-sonify-btn:hover,
.argira-sonify-btn:focus-visible {
  background: rgba(220, 130, 200, 0.1) !important;
  border-color: rgba(220, 130, 200, 0.6) !important;
  color: rgb(250, 180, 235) !important;
}
.argira-sonify-btn[aria-pressed="true"] {
  background: rgba(220, 130, 200, 0.15) !important;
  border-color: rgba(220, 130, 200, 0.7) !important;
}
.argira-sonify-btn:disabled {
  opacity: 0.5 !important;
  cursor: wait !important;
}

/* Lupa inversa (canvas) */
.lupa-inversa-wrap {
  display: none;
  margin-top: 18px;
  background: #000;
  border: 1px solid rgba(232,201,106,0.2);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
}
.lupa-inversa-wrap.visible { display: block; }
.lupa-inversa-label {
  position: absolute;
  top: 8px; left: 10px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.60rem;
  color: rgba(232,201,106,0.55);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  pointer-events: none;
  z-index: 2;
}
.lupa-inversa-freq {
  position: absolute;
  bottom: 8px; right: 10px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.60rem;
  color: rgba(232,201,106,0.55);
  pointer-events: none;
  z-index: 2;
}
#lupa-inversa-canvas {
  width: 100%;
  height: 200px;
  display: block;
}
.lupa-pattern-row {
  display: flex;
  gap: 6px;
  padding: 8px 10px;
  background: rgba(232,201,106,0.03);
  border-top: 1px solid rgba(232,201,106,0.1);
}
.lupa-pchip {
  padding: 3px 10px;
  border-radius: 99px;
  border: 1px solid rgba(232,201,106,0.2);
  background: transparent;
  color: rgba(232,201,106,0.5);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.60rem;
  cursor: pointer;
  transition: all 0.15s;
}
.lupa-pchip.active,
.lupa-pchip:hover {
  border-color: rgba(232,201,106,0.7);
  color: #e8c96a;
  background: rgba(232,201,106,0.07);
}

/* Rugosidad widget */
.argira-roughness-widget {
  margin: 6px 0 2px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  text-align: center;
  line-height: 1.5;
}

/* Modo touch (tap / barrido / braille) */
.argira-mode-btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.70rem;
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid rgba(232,201,106,0.25);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
}
.argira-mode-btn:hover { border-color: var(--gold-dim); color: var(--gold); }
.argira-mode-btn.argira-mode-active {
  background: rgba(232,201,106,0.15);
  border-color: var(--gold-dim);
  color: var(--gold);
}

/* Responsive */
@media (max-width: 768px) {
  .site-nav { overflow-x: auto; text-align: left; }
  .gallery {
    grid-template-columns: 1fr !important;
    padding: 0 10px;
  }
  .hero-title { font-size: clamp(3rem, 15vw, 5rem); }
  .lb-trigger-btn { display: none; }
  .lightbox-caption {
    white-space: normal;
    text-align: center;
    width: 90vw;
    font-size: 0.62rem;
  }
  .lightbox-close {
    font-size: 2rem;
    padding: 10px 14px;
    top: 10px; right: 10px;
  }
  :root {
    --text-dim: #d4c9b0;
    --text-body: #f0e6d0;
    --gold-dim: #e8c96a;
  }
  body { font-size: 20px; }
  .stat-label, .section-label, .hero-eyebrow, .hero-sub, .card-num, .audio-label,
  .sound-profile-title, .formula-sub, .scatter-eyebrow, .footer-title {
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.12em;
  }
  .stat-value { font-size: 2.2rem; }
  .formula-text { font-size: 1.2rem; font-weight: 500; }
  .section-title { font-size: 2rem; }
  .card-desc { font-size: 1.05rem; }
  .card-artist { font-size: 1.2rem; }
  .tag { font-size: 0.88rem; color: var(--text-body); }
  .test-intro { font-size: 1.05rem; }
  .score-message { font-size: 1.3rem; }
}
@media (max-width: 560px) {
  body { font-size: 18px; }
  .test-players { grid-template-columns: 1fr; }
  .test-reveal.show { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .speak-btn { width: 100%; justify-content: center; padding: 14px 12px; }
}
@media (min-width: 1200px) {
  .hero { padding-left: 40px; padding-right: 40px; }
  .hero-title { font-size: clamp(5rem, 10vw, 8rem); }
  .section-title { font-size: clamp(2rem, 4vw, 3.5rem); }
  .card-body { padding: 22px; }
  .gallery {
    grid-template-columns: repeat(3, 1fr) !important;
  }
  body { font-size: 20px; }
  .card-desc { font-size: 1.05rem; }
  .card-artist { font-size: 1.25rem; }
  .card-work { font-size: 1.1rem; }
  .access-intro { max-width: 900px; }
  .test-section { max-width: 900px; }
  .scatter-section { max-width: 900px; }
  #lupa-temporal > div,
  #analiza-tu-imagen > div { max-width: 860px; margin: 0 auto; }
}
@media (min-width: 1600px) {
  .gallery {
    grid-template-columns: repeat(4, 1fr) !important;
  }
  body { font-size: 21px; }
  .access-intro { max-width: 1100px; }
  .test-section { max-width: 1000px; }
  .scatter-section { max-width: 1000px; }
  #lupa-temporal > div,
  #analiza-tu-imagen > div { max-width: 960px; }
}
/* ── Perfil perceptual de la obra — panel <details> accesible ─────────────── */
/* Elimina marcador nativo para evitar doble flecha */
.argira-perceptual-details summary::-webkit-details-marker { display: none; }
.argira-perceptual-details summary { list-style: none; }
.argira-tech-details summary::-webkit-details-marker { display: none; }
.argira-tech-details summary { list-style: none; }

.argira-perceptual-details {
  margin: 12px 0 8px;
  border: 1px solid var(--border);
  background: rgba(232,201,106,0.04);
  border-radius: var(--radius);
}

.argira-perceptual-summary {
  padding: 12px 16px;
  font-family: 'Cinzel', serif;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--gold);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.argira-perceptual-summary:hover { color: var(--text); }

/* Rotar flecha al expandir */
.argira-perceptual-details[open] > .argira-perceptual-summary .argira-details-arrow,
.argira-tech-details[open] > .argira-tech-summary .argira-details-arrow {
  display: inline-block;
  transform: rotate(180deg);
}

.argira-perceptual-content {
  padding: 0 16px 16px;
}

.argira-perfil-rows {
  margin: 8px 0 12px;
}

.argira-perfil-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 0;
  border-bottom: 1px solid rgba(232,201,106,0.08);
}

.argira-perfil-label {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.argira-perfil-val {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.74rem;
  color: var(--gold);
}

.argira-tech-details {
  margin-top: 8px;
  border-top: 1px solid rgba(232,201,106,0.1);
  padding-top: 8px;
}

.argira-tech-summary {
  padding: 4px 0;
  font-family: 'Cinzel', serif;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.argira-tech-summary:hover { color: var(--gold-dim); }

.argira-tech-content {
  padding: 8px 0 4px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-dim);
  line-height: 1.8;
}
/* ─────────────────────────────────────────────────────────────────────────── */

/* ── Modo lector de pantalla — toggle explícito ──────────────────────────────
   El usuario activa/desactiva con el botón "♿ Lector" del nav.
   visibility:hidden elimina el canvas del flujo visual Y táctil sin sacarlo
   del DOM (no rompe referencias JS). Evita el "fantasma interactivo" que
   pointer-events:none dejaba visible pero inaccesible para debugging accesible.
   Los guards en touchstart/touchend/touchmove actúan como segunda barrera
   para edge cases donde visibility no bloquea eventos en algunos WebViews. */
.argira-accessibility-mode canvas {
  visibility: hidden;
  pointer-events: none;
}

/* Botón de toggle — estado activo */
#btn-reader-mode[aria-pressed="true"] {
  color: var(--gold);
  border-bottom: 2px solid var(--gold);
}
/* ─────────────────────────────────────────────────────────────────────────── */