:root {
  --navy: #08202e; --teal-deep: #0e4d5c; --teal: #1a7a8a; --teal-mid: #2aaec2;
  --teal-soft: #7ed6e4; --teal-pale: #d4f2f7; --cream: #f7f2eb; --warm: #7a5c33;
  --warm-lt: #f0e6d3; --bg: #f5fafc; --text: #0d2535; --text-mid: #3a5a6a; --text-soft: #3a5a6a;
  --easing: cubic-bezier(0.16, 1, 0.3, 1); --r: 18px; --r-lg: 26px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
/* padding-bottom deja lugar para que el botón flotante de accesibilidad
   (fixed, bottom:80px) no tape el último contenido de la página. */
body { font-family: 'Nunito', sans-serif; background: var(--bg); color: var(--text); padding-bottom: 180px; }
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--teal-mid); outline-offset: 2px; border-radius: 4px; }
button { font-family: inherit; }
h1, h2, h3 { font-family: 'Playfair Display', serif; font-weight: 500; color: var(--navy); }

header.sh-header { background: linear-gradient(160deg, var(--navy), var(--teal-deep)); padding: 20px 20px 40px; border-radius: 0 0 32px 32px; position: relative; overflow: hidden; }
header.sh-header::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse 70% 50% at 80% 0%, rgba(126,214,228,0.2), transparent 60%); }
.sh-topbar { display: flex; align-items: center; justify-content: space-between; position: relative; z-index: 1; }
.sh-intro { position: relative; z-index: 1; margin-top: 18px; color: white; max-width: 480px; }
.sh-intro h1 { color: white; font-size: 1.5rem; margin-bottom: 6px; }
.sh-intro p { color: rgba(255,255,255,0.72); font-size: 0.9rem; line-height: 1.5; }

.sh-necesidades { max-width: 640px; margin: -22px auto 0; padding: 0 18px; position: relative; z-index: 2; }
.sh-necesidades-card { background: white; border-radius: var(--r-lg); padding: 20px; box-shadow: 0 20px 50px rgba(8,32,46,0.12); }
.sh-necesidades-card h2 { font-size: 0.95rem; font-family: 'Nunito', sans-serif; font-weight: 800; margin-bottom: 12px; }
.sh-necesidad-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.sh-necesidad-btn { border: none; background: var(--bg); border-radius: 14px; padding: 12px 4px; display: flex; flex-direction: column; align-items: center; gap: 4px; font-size: 0.68rem; font-weight: 700; color: var(--text-mid); cursor: pointer; text-align: center; transition: background 0.2s, transform 0.2s; touch-action: manipulation; }
.sh-necesidad-btn:active { background: var(--teal-pale); transform: scale(0.94); }
.sh-necesidad-btn .emoji { font-size: 1.4rem; }

.sh-seccion { max-width: 640px; margin: 28px auto 0; padding: 0 18px; }
.sh-seccion h2 { font-size: 1.05rem; margin-bottom: 4px; font-family: 'Nunito', sans-serif; font-weight: 800; }
.sh-seccion .sub { font-size: 0.82rem; color: var(--text-soft); margin-bottom: 14px; }

.sh-porque-grid { display: grid; grid-template-columns: 1fr; gap: 10px; }
@media (min-width: 560px) { .sh-porque-grid { grid-template-columns: 1fr 1fr; } }
.sh-porque-card { background: white; border-radius: var(--r); padding: 14px 16px; border: 1px solid rgba(8,32,46,0.06); }
.sh-porque-titulo { font-weight: 800; font-size: 0.85rem; color: var(--navy); margin-bottom: 6px; }
.sh-porque-card p:not(.sh-porque-titulo) { font-size: 0.78rem; color: var(--text-mid); line-height: 1.6; }

.sh-categorias-tabs { display: flex; gap: 8px; overflow-x: auto; margin-bottom: 14px; }
.sh-cat-tab { flex: 0 0 auto; border: 2px solid var(--teal-pale); background: white; border-radius: 50px; padding: 8px 16px; font-size: 0.82rem; font-weight: 700; color: var(--text-mid); cursor: pointer; white-space: nowrap; transition: transform 0.15s; touch-action: manipulation; }
.sh-cat-tab.activo { background: var(--navy); border-color: var(--navy); color: white; }
.sh-cat-tab:active { transform: scale(0.93); }

.sh-pistas-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.sh-pista-card { background: white; border-radius: var(--r); padding: 14px; text-align: left; box-shadow: 0 4px 14px rgba(8,32,46,0.05); border: 2px solid transparent; cursor: pointer; transition: border-color 0.2s, background 0.2s, transform 0.15s; display: flex; flex-direction: column; gap: 6px; touch-action: manipulation; }
.sh-pista-card:active { transform: scale(0.97); border-color: var(--teal-pale); }
.sh-pista-card.activa { border-color: var(--teal-mid); background: var(--teal-pale); }
.sh-pista-card.no-disponible { opacity: 0.55; cursor: default; }
.sh-pista-card .emoji { font-size: 1.5rem; }
.sh-pista-card .titulo { font-weight: 700; font-size: 0.88rem; }
.sh-pista-card .estado { font-size: 0.68rem; color: var(--text-soft); }
.sh-pista-card.activa .estado { color: var(--teal-deep); font-weight: 700; }

/* ── Mezclador persistente (siempre visible mientras hay pistas activas) ── */
.sh-mezclador { position: fixed; bottom: 0; left: 0; right: 0; background: white; border-radius: 22px 22px 0 0; box-shadow: 0 -10px 40px rgba(8,32,46,0.15); z-index: 400; max-height: 60vh; overflow-y: auto; transform: translateY(100%); transition: transform 0.3s var(--easing); }
.sh-mezclador.abierto { transform: translateY(0); }
.sh-mezclador-handle { padding: 10px 18px 4px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; }
.sh-mezclador-handle .titulo { font-weight: 800; font-size: 0.9rem; }
.sh-mezclador-contenido { padding: 4px 18px 20px; }
.sh-pista-slider { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.sh-pista-slider .emoji { font-size: 1.2rem; width: 26px; text-align: center; }
.sh-pista-slider .nombre { font-size: 0.82rem; font-weight: 700; width: 84px; flex-shrink: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sh-pista-slider input[type="range"] { flex: 1; accent-color: var(--teal-mid); }
.sh-pista-slider .quitar { border: none; background: none; color: var(--text-soft); font-size: 1rem; cursor: pointer; width: 26px; }
.sh-mezclador-controles { display: flex; align-items: center; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.sh-temporizador-select { border: 2px solid var(--teal-pale); border-radius: 50px; padding: 8px 14px; font-size: 0.8rem; font-weight: 700; color: var(--text-mid); background: white; }
.sh-mezclador-vacio { color: var(--text-soft); font-size: 0.85rem; text-align: center; padding: 10px; }

.sh-btn { padding: 12px 22px; border-radius: 50px; border: none; font-weight: 700; font-size: 0.88rem; cursor: pointer; transition: transform 0.2s; touch-action: manipulation; }
.sh-btn:active { transform: scale(0.95); }
.sh-btn-principal { background: linear-gradient(135deg, var(--teal-deep), var(--teal)); color: white; box-shadow: 0 6px 16px rgba(42,174,194,0.3); }
.sh-btn-secundario { background: var(--teal-pale); color: var(--teal-deep); }

.sh-barra-flotante { position: fixed; bottom: 0; left: 0; right: 0; background: var(--navy); color: white; padding: 12px 18px; display: flex; align-items: center; justify-content: space-between; z-index: 399; }
.sh-barra-flotante[hidden] { display: none; }
.sh-barra-flotante .info { font-size: 0.82rem; font-weight: 700; }

/* ── Explorador de binaurales ── */
.sh-bandas-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 16px; }
.sh-banda-card { border-radius: var(--r); padding: 14px 8px; text-align: center; cursor: pointer; border: 2px solid transparent; background: white; box-shadow: 0 4px 14px rgba(8,32,46,0.05); transition: border-color 0.2s, transform 0.15s; touch-action: manipulation; }
.sh-banda-card.activa { border-color: var(--teal-mid); }
.sh-banda-card:active { transform: scale(0.95); }
.sh-banda-card .nombre { font-weight: 800; font-size: 0.85rem; }
.sh-banda-card .rango { font-size: 0.66rem; color: var(--text-soft); margin-top: 2px; }
.sh-banda-desc { background: white; border-radius: var(--r); padding: 16px; font-size: 0.85rem; color: var(--text-mid); line-height: 1.6; margin-bottom: 16px; }
.sh-explorador-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin-bottom: 18px; }
.sh-explorador-btn { background: white; border: 2px solid var(--teal-pale); border-radius: var(--r); padding: 12px 8px; text-align: center; font-size: 0.78rem; font-weight: 700; color: var(--text-mid); cursor: pointer; transition: transform 0.15s, background 0.15s; touch-action: manipulation; }
.sh-explorador-btn:active { transform: scale(0.95); background: var(--teal-pale); }
.sh-binaural-controles { background: white; border-radius: var(--r-lg); padding: 18px; box-shadow: 0 4px 14px rgba(8,32,46,0.05); }
.sh-binaural-fila { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.sh-binaural-fila label { font-size: 0.8rem; font-weight: 700; width: 110px; flex-shrink: 0; }
.sh-binaural-fila input[type="range"] { flex: 1; accent-color: var(--teal-mid); }
.sh-binaural-fila .valor { font-size: 0.78rem; color: var(--teal-deep); font-weight: 800; width: 56px; text-align: right; }
.sh-aviso { background: var(--warm-lt); border-radius: var(--r); padding: 14px 16px; font-size: 0.8rem; color: #6a5636; line-height: 1.6; margin: 14px 0; }

/* ── Mezclas guardadas ── */
.sh-mezcla-guardada { background: white; border-radius: var(--r); padding: 14px 16px; display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; box-shadow: 0 2px 10px rgba(8,32,46,0.05); }
.sh-mezcla-guardada .nombre { font-weight: 700; font-size: 0.88rem; }
.sh-mezcla-guardada .detalle { font-size: 0.72rem; color: var(--text-soft); }
.sh-mezcla-acciones { display: flex; gap: 6px; }
.sh-mezcla-acciones button { border: none; background: var(--teal-pale); color: var(--teal-deep); border-radius: 50px; padding: 6px 12px; font-size: 0.75rem; font-weight: 700; cursor: pointer; transition: transform 0.15s; touch-action: manipulation; }
.sh-mezcla-acciones button:active { transform: scale(0.92); }
.sh-mezcla-acciones button.eliminar { background: #ffe0e0; color: #a04040; }

.sh-vacio { color: var(--text-soft); font-size: 0.85rem; text-align: center; padding: 20px; }
.sh-audio-no-disponible { text-align: center; padding: 40px 20px; }
.sh-audio-no-disponible p { color: var(--text-mid); }

.sh-stat-card { background: white; border-radius: var(--r); padding: 14px 8px; text-align: center; box-shadow: 0 2px 10px rgba(8,32,46,0.05); }
.sh-stat-card .valor { font-size: 1.3rem; font-weight: 800; color: var(--teal-deep); font-family: 'Playfair Display', serif; }
.sh-stat-card .etiqueta { font-size: 0.66rem; color: var(--text-soft); margin-top: 2px; }

.sh-logro-toast { position: fixed; top: 16px; left: 50%; transform: translateX(-50%) translateY(-120%); background: var(--navy); color: white; padding: 12px 20px; border-radius: 50px; font-size: 0.82rem; font-weight: 700; z-index: 600; transition: transform 0.4s var(--easing); box-shadow: 0 10px 30px rgba(0,0,0,0.3); white-space: nowrap; }
.sh-logro-toast.mostrar { transform: translateX(-50%) translateY(0); }

@media(min-width: 700px) {
  .sh-necesidad-grid { grid-template-columns: repeat(4, 1fr); }
  .sh-pistas-grid { grid-template-columns: repeat(4, 1fr); }
  .sh-bandas-grid { grid-template-columns: repeat(5, 1fr); }
  .sh-explorador-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ── Botón de perfil (header) ── */
.sh-perfil-btn { width: 38px; height: 38px; border-radius: 50%; border: 2px solid rgba(255,255,255,0.3); background: rgba(255,255,255,0.1); color: white; font-size: 1.1rem; cursor: pointer; display: flex; align-items: center; justify-content: center; overflow: hidden; padding: 0; transition: transform 0.15s, background 0.2s; touch-action: manipulation; }
.sh-perfil-btn:active { transform: scale(0.9); background: rgba(255,255,255,0.2); }

/* ── Modal de perfil: mismas reglas que juegos.css/ejercicios.css, en línea
   a propósito (no @import — ver comentario en esos archivos) ── */
.jp-modal-overlay {
  position: fixed; inset: 0; background: rgba(8,32,46,0.6); backdrop-filter: blur(6px);
  display: flex; align-items: flex-end; justify-content: center; z-index: 900;
}
.jp-modal-overlay[hidden] { display: none; }
.jp-modal {
  background: white; border-radius: 26px 26px 0 0; padding: 28px 22px 34px;
  width: 100%; max-width: 480px; animation: jpModalIn 0.3s var(--easing) both;
}
@media(min-width: 560px) { .jp-modal-overlay { align-items: center; } .jp-modal { border-radius: var(--r-lg); } }
@keyframes jpModalIn { from { transform: translateY(30px); opacity: 0; } to { transform: none; opacity: 1; } }
.jp-modal h2 { font-family: 'Playfair Display', serif; margin-bottom: 16px; }
.jp-avatares { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.jp-avatar-opcion {
  width: 44px; height: 44px; border-radius: 50%; border: 2px solid transparent; background: var(--bg);
  font-size: 1.3rem; cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: transform 0.15s, border-color 0.2s, background 0.2s; touch-action: manipulation;
}
.jp-avatar-opcion:active { transform: scale(0.9); }
.jp-avatar-opcion.activo { border-color: var(--teal-mid); background: var(--teal-pale); }
.jp-modal input[type="text"] {
  width: 100%; border: 2px solid var(--teal-pale); border-radius: var(--r); padding: 12px 16px;
  font-family: inherit; font-size: 1rem; margin-bottom: 18px;
}
.jp-modal-cerrar {
  width: 100%; border: none; border-radius: 50px; padding: 14px; font-weight: 700;
  background: linear-gradient(135deg, var(--teal-deep), var(--teal)); color: white; cursor: pointer;
  transition: transform 0.15s; touch-action: manipulation;
}
.jp-modal-cerrar:active { transform: scale(0.97); }
.jp-nivel-barra { height: 8px; background: var(--teal-pale); border-radius: 8px; overflow: hidden; margin: 6px 0 16px; }
.jp-nivel-barra-fill { width: 100%; height: 100%; background: linear-gradient(90deg, var(--teal), var(--teal-mid)); transform: scaleX(0); transform-origin: left; transition: transform 0.4s; }


/* Hover con transform/scale: solo en dispositivos que de verdad tienen mouse.
   En touch, :hover se dispara con el tap y queda "pegado" hasta el próximo
   toque en otro lado — mover estas reglas acá evita ese efecto. */
@media (hover: hover) and (pointer: fine) {
  .sh-necesidad-btn:hover { background: var(--teal-pale); transform: translateY(-2px); }
  .sh-btn:hover { transform: translateY(-1px); }
  .sh-pista-card:hover { border-color: var(--teal-pale); }
  .sh-explorador-btn:hover { background: var(--teal-pale); }
  .sh-mezcla-acciones button:hover { transform: translateY(-1px); }
}