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

/* === Design tokens === */
:root {
  --color-bg: #0b0e14;
  --color-surface: #151a23;
  --color-surface-2: #1b2230;
  --color-text: #e7e9ee;
  --color-accent: #00e0a8;
  --color-accent-2: #ff3d6e;
  --color-muted: #5b6270;
  --color-line: #232a37;

  --accent-rgb: 0, 224, 168;
  --accent-2-rgb: 255, 61, 110;

  --fuente-display: "Unbounded", sans-serif;
  --fuente-cuerpo: "IBM Plex Sans", sans-serif;
  --fuente-mono: "JetBrains Mono", monospace;

  --radio: 6px;
  --transicion: 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Base (Mobile First: esto es lo que ve un celular) === */
html,
body {
  height: 100%;
}

body {
  position: relative;
  isolation: isolate;
  font-family: var(--fuente-cuerpo);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.5;
  padding: 1.25rem 1rem 3rem;
  max-width: 880px;
  margin-inline: auto;
}

/* Vignette + resplandor ambiental fijo al viewport, detrás de todo el contenido */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(
      ellipse 900px 500px at 12% -5%,
      rgba(var(--accent-rgb), 0.1),
      transparent 60%
    ),
    radial-gradient(
      ellipse 700px 500px at 100% 10%,
      rgba(var(--accent-2-rgb), 0.07),
      transparent 55%
    ),
    var(--color-bg);
}

/* Líneas de escaneo tipo pantalla LCD, muy sutiles */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.025) 0px,
    rgba(255, 255, 255, 0.025) 1px,
    transparent 1px,
    transparent 3px
  );
  mix-blend-mode: overlay;
  opacity: 0.5;
}

@media (prefers-reduced-motion: reduce) {
  body::after {
    opacity: 0.25;
  }
}

/* === Masthead + ecualizador === */
.masthead {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem;
  margin-bottom: 2rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 60%),
    var(--color-surface);
  border: 1px solid var(--color-line);
  border-bottom: 2px solid rgba(var(--accent-rgb), 0.35);
  border-radius: var(--radio);
  box-shadow:
    0 12px 30px -18px rgba(0, 0, 0, 0.8),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.masthead h1 {
  position: relative;
  font-family: var(--fuente-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 5vw, 2.25rem);
  letter-spacing: 0.01em;
  text-transform: lowercase;
  padding-right: 0.9rem;
}

/* Piloto "on air": un LED que respira junto al logo, como el testigo de encendido de una consola */
.masthead h1::after {
  content: "";
  position: absolute;
  top: 0.35rem;
  right: -0.15rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 6px 1px rgba(var(--accent-rgb), 0.8);
  animation: respirar 2.4s ease-in-out infinite;
}

@keyframes respirar {
  0%,
  100% {
    opacity: 0.45;
  }
  50% {
    opacity: 1;
  }
}

.eq-masthead {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 28px;
  flex-shrink: 0;
  padding: 4px;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--color-line);
  border-radius: 4px;
}

.eq-barra {
  width: 5px;
  height: 30%;
  background-color: var(--color-accent);
  border-radius: 1px;
  box-shadow: 0 0 4px rgba(var(--accent-rgb), 0.6);
  transition:
    background-color var(--transicion),
    opacity var(--transicion);
  opacity: 0.35;
}

.eq-masthead.eq-activo .eq-barra {
  opacity: 1;
  animation: rebotar 0.9s ease-in-out infinite;
}

.eq-masthead.eq-activo .eq-barra:nth-child(1) {
  animation-delay: 0s;
}
.eq-masthead.eq-activo .eq-barra:nth-child(2) {
  animation-delay: 0.15s;
}
.eq-masthead.eq-activo .eq-barra:nth-child(3) {
  animation-delay: 0.3s;
}
.eq-masthead.eq-activo .eq-barra:nth-child(4) {
  animation-delay: 0.1s;
}

@keyframes rebotar {
  0%,
  100% {
    height: 20%;
  }
  50% {
    height: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .eq-masthead.eq-activo .eq-barra {
    animation: none;
    height: 60%;
  }
  .masthead h1::after {
    animation: none;
    opacity: 1;
  }
}

h2 {
  font-family: var(--fuente-mono);
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

/* === Pestañas: selector de canal de consola === */
.tabs {
  display: flex;
  gap: 0.5rem;
  padding: 0.35rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radio);
  margin-bottom: 1.5rem;
}

.tab-btn {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 0.4rem;
  border: 1px solid transparent;
  border-radius: 4px;
  background: none;
  font-family: var(--fuente-display);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--color-muted);
  cursor: pointer;
  transition:
    color var(--transicion),
    background-color var(--transicion),
    border-color var(--transicion);
}

.tab-btn:hover {
  color: var(--color-text);
  background-color: rgba(255, 255, 255, 0.03);
}

.tab-btn[aria-selected="true"] {
  color: var(--color-bg);
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 16px -2px rgba(var(--accent-rgb), 0.55);
}

.tab-btn:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: none;
  box-shadow:
    0 0 0 2px var(--color-bg),
    0 0 0 4px var(--color-accent);
}

/* === Búsqueda: lector estilo LCD === */
#form-busqueda {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

#input-busqueda {
  flex: 1;
  padding: 0.7rem 0.95rem;
  border: 1px solid var(--color-line);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-family: var(--fuente-mono);
  font-size: 0.95rem;
  border-radius: var(--radio);
  transition:
    border-color var(--transicion),
    box-shadow var(--transicion);
}

#input-busqueda:focus-visible {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.18);
}

#input-busqueda::placeholder {
  color: var(--color-muted);
}

.campo-busqueda {
  position: relative;
  flex: 1;
  display: flex;
}

.campo-busqueda #input-busqueda {
  width: 100%;
  padding-right: 2.5rem; /* deja espacio para que el texto no quede debajo del ✕ */
}

.btn-limpiar-busqueda {
  position: absolute;
  top: 50%;
  right: 0.5rem;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--color-muted);
  border-radius: 50%;
  cursor: pointer;
  transition:
    color var(--transicion),
    background-color var(--transicion);
}

.btn-limpiar-busqueda:hover {
  color: var(--color-accent-2);
  background-color: rgba(var(--accent-2-rgb), 0.1);
}

.btn-limpiar-busqueda:focus-visible {
  outline: none;
  box-shadow:
    0 0 0 2px var(--color-bg),
    0 0 0 4px var(--color-accent);
}

#btn-buscar {
  width: 100%;
  padding: 0.7rem 1.4rem;
  border: 1px solid var(--color-accent);
  background-color: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--fuente-mono);
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radio);
  cursor: pointer;
  transition:
    transform var(--transicion),
    box-shadow var(--transicion);
}

#btn-buscar:hover:not(:disabled) {
  box-shadow: 0 0 18px -2px rgba(var(--accent-rgb), 0.6);
  transform: translateY(-1px);
}

#btn-buscar:active:not(:disabled) {
  transform: translateY(0);
}

#btn-buscar:disabled {
  background-color: var(--color-surface);
  border-color: var(--color-line);
  color: var(--color-muted);
  cursor: not-allowed;
}

/* === Mensaje de estado de la búsqueda === */
#mensaje-busqueda {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--fuente-mono);
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-bottom: 1rem;
  min-height: 2.5rem;
  text-align: center;
}

.modal-titulo-alerta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.modal-titulo-alerta svg {
  flex-shrink: 0;
  color: var(--color-accent-2);
}

#btn-empezar-de-cero {
  width: 100%;
  padding: 0.7rem 1.4rem;
  border: 1px solid var(--color-accent);
  background-color: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--fuente-mono);
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radio);
  cursor: pointer;
  transition:
    transform var(--transicion),
    box-shadow var(--transicion);
}

#btn-empezar-de-cero:hover:not(:disabled) {
  box-shadow: 0 0 18px -2px rgba(var(--accent-rgb), 0.6);
  transform: translateY(-1px);
}

#btn-empezar-de-cero:active:not(:disabled) {
  transform: translateY(0);
}

#btn-empezar-de-cero:disabled {
  background-color: var(--color-surface);
  border-color: var(--color-line);
  color: var(--color-muted);
  cursor: not-allowed;
}

.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2.5px solid transparent;
  border-top-color: var(--color-accent);
  border-right-color: var(--color-accent-2);
  box-shadow: 0 0 6px rgba(var(--accent-rgb), 0.35);
  animation: girar 0.7s cubic-bezier(0.5, 0.1, 0.5, 0.9) infinite;
}

@keyframes girar {
  to {
    transform: rotate(360deg);
  }
}

/* === Listas (resultados, playlists y canciones de playlists): channel strips === */
#lista-resultados,
#lista-playlists,
#lista-canciones-playlist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.resultado-item,
.playlist-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 0.9rem 0.8rem 1.1rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radio);
  overflow: hidden;
  transition:
    transform var(--transicion),
    border-color var(--transicion),
    box-shadow var(--transicion);
}

/* Franja LED lateral, como el fader de un canal de mezcla */
.resultado-item::before,
.playlist-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(
    180deg,
    var(--color-accent),
    var(--color-accent-2)
  );
  opacity: 0.7;
  transition:
    opacity var(--transicion),
    width var(--transicion);
}

.resultado-item:hover,
.playlist-item:hover {
  border-color: rgba(var(--accent-rgb), 0.4);
  box-shadow: 0 10px 24px -16px rgba(0, 0, 0, 0.9);
  transform: translateY(-1px);
}

.resultado-item:hover::before,
.playlist-item:hover::before {
  width: 4px;
  opacity: 1;
}

.eq-mini {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  width: 22px;
  height: 20px;
  flex-shrink: 0;
  padding: 2px;
  background-color: rgba(0, 0, 0, 0.3);
  border-radius: 3px;
}

.eq-mini span {
  width: 3px;
  border-radius: 1px;
  background-color: var(--color-accent-2);
  box-shadow: 0 0 3px rgba(var(--accent-2-rgb), 0.7);
}

.resultado-item img {
  width: 44px;
  height: 44px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
  border: 1px solid var(--color-line);
}

.resultado-item strong,
.playlist-item strong {
  font-family: var(--fuente-cuerpo);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-text);
}

.resultado-item small,
.playlist-item span {
  font-family: var(--fuente-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
  letter-spacing: 0.02em;
}

.resultado-item small {
  display: block;
}

.playlist-item span {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.icono-duracion-mini {
  flex-shrink: 0;
  vertical-align: middle;
}

.playlists-vacio {
  color: var(--color-muted);
  padding: 1.5rem 1rem;
  text-align: center;
  background-color: var(--color-surface);
  border: 1px dashed var(--color-line);
  border-radius: var(--radio);
}

.playlists-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

#btn-nueva-playlist {
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--color-accent);
  background: transparent;
  color: var(--color-accent);
  font-family: var(--fuente-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radio);
  cursor: pointer;
  transition:
    background-color var(--transicion),
    color var(--transicion),
    box-shadow var(--transicion);
}

#btn-nueva-playlist:hover {
  background-color: var(--color-accent);
  color: var(--color-bg);
  box-shadow: 0 0 18px -2px rgba(var(--accent-rgb), 0.6);
}

/* === Card de playlist con botón "Ver" === */
.playlist-item {
  justify-content: space-between;
}

.detalle-duracion {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--fuente-mono);
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 1rem;
}

.detalle-duracion svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.detalle-estadisticas {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.estadistica-item {
  padding: 0.75rem 0.6rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radio);
  text-align: center;
}

.estadistica-item dt {
  font-family: var(--fuente-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-muted);
  margin-bottom: 0.35rem;
}

.estadistica-item dd {
  font-family: var(--fuente-cuerpo);
  font-size: 0.9rem;
  color: var(--color-text);
  margin: 0;
  overflow-wrap: break-word;
}

.detalle-orden {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.detalle-orden label {
  font-family: var(--fuente-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-muted);
}

.detalle-orden select {
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--color-line);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-family: var(--fuente-mono);
  font-size: 0.8rem;
  border-radius: var(--radio);
  cursor: pointer;
}

.detalle-orden select:focus-visible {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.18);
}

.btn-ver-playlist {
  flex-shrink: 0;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--color-accent);
  background: transparent;
  color: var(--color-accent);
  font-family: var(--fuente-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--radio);
  cursor: pointer;
}

.btn-ver-playlist:hover {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

/* === Detalle de playlist === */
.btn-volver {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0;
  border: none;
  background: none;
  color: var(--color-muted);
  font-family: var(--fuente-mono);
  font-size: 0.8rem;
  cursor: pointer;
}

.btn-volver:hover {
  color: var(--color-accent);
}

.btn-eliminar-playlist {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--color-line);
  background: transparent;
  color: var(--color-muted);
  font-family: var(--fuente-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--radio);
  cursor: pointer;
  transition:
    color var(--transicion),
    border-color var(--transicion),
    background-color var(--transicion);
}

.btn-eliminar-playlist svg {
  width: 16px;
  height: 16px;
}

.btn-eliminar-playlist:hover {
  color: var(--color-accent-2);
  border-color: var(--color-accent-2);
  background-color: rgba(var(--accent-2-rgb), 0.08);
}

.btn-quitar-cancion {
  margin-left: auto;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--color-line);
  background-color: transparent;
  color: var(--color-muted);
  border-radius: var(--radio);
  cursor: pointer;
  transition:
    color var(--transicion),
    border-color var(--transicion),
    background-color var(--transicion);
}

.btn-quitar-cancion:hover {
  color: var(--color-accent-2);
  border-color: var(--color-accent-2);
  background-color: rgba(var(--accent-2-rgb), 0.08);
}

.btn-peligro {
  border: 1px solid var(--color-accent-2);
  background-color: var(--color-accent-2);
  color: var(--color-bg);
}

.btn-peligro:hover {
  box-shadow: 0 0 16px -2px rgba(var(--accent-2-rgb), 0.6);
}

.detalle-titulo {
  font-family: var(--fuente-display);
  font-size: 1.3rem;
  color: var(--color-text);
  text-transform: none;
  letter-spacing: normal;
  margin-bottom: 1rem;
}

/* === Modal: panel de rack, con marcas de esquina tipo flightcase === */
.overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(5, 6, 10, 0.82);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.overlay.oculto {
  display: none;
}

.modal {
  position: relative;
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  padding: 2rem;
  width: 90%;
  max-width: 380px;
  box-shadow:
    0 24px 60px -20px rgba(0, 0, 0, 0.9),
    0 0 0 1px rgba(255, 255, 255, 0.02);
}

/* Marcas de esquina, referencia visual a equipos de rack/flightcase */
.modal::before,
.modal::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(var(--accent-rgb), 0.6);
  top: 8px;
}

.modal::before {
  left: 8px;
  border-right: none;
  border-bottom: none;
}

.modal::after {
  right: 8px;
  border-left: none;
  border-bottom: none;
}

.modal h3 {
  font-family: var(--fuente-display);
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
  color: var(--color-text);
}

.modal label {
  display: block;
  font-family: var(--fuente-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-muted);
  margin-bottom: 0.4rem;
}

.modal input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-line);
  background-color: var(--color-bg);
  color: var(--color-text);
  border-radius: 4px;
  font-family: var(--fuente-mono);
  font-size: 1rem;
  transition:
    border-color var(--transicion),
    box-shadow var(--transicion);
}

.modal input:focus-visible {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.18);
}

#error-nueva-playlist {
  font-family: var(--fuente-mono);
  color: var(--color-accent-2);
  font-size: 0.75rem;
  margin-top: 0.5rem;
  min-height: 1.1rem;
}

.modal-acciones {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.modal-acciones button {
  padding: 0.55rem 1.1rem;
  border-radius: 4px;
  font-family: var(--fuente-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition:
    background-color var(--transicion),
    color var(--transicion),
    border-color var(--transicion);
}

#btn-cancelar-playlist {
  border: 1px solid var(--color-line);
  background: transparent;
  color: var(--color-muted);
}

#btn-cancelar-playlist:hover {
  color: var(--color-text);
  border-color: var(--color-muted);
}

#btn-crear-playlist {
  border: 1px solid var(--color-accent);
  background-color: var(--color-accent);
  color: var(--color-bg);
}

#btn-crear-playlist:hover {
  box-shadow: 0 0 16px -2px rgba(var(--accent-rgb), 0.6);
}

#btn-cancelar-quitar-cancion {
  border: 1px solid var(--color-line);
  background: transparent;
  color: var(--color-muted);
}

#btn-cancelar-quitar-cancion:hover {
  color: var(--color-text);
  border-color: var(--color-muted);
}

#btn-cancelar-eliminar-playlist {
  border: 1px solid var(--color-line);
  background: transparent;
  color: var(--color-muted);
}

#btn-cancelar-eliminar-playlist:hover {
  color: var(--color-text);
  border-color: var(--color-muted);
}

/* === Scrollbar (WebKit) a tono con la consola === */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background-color: var(--color-line);
  border-radius: 5px;
  border: 2px solid var(--color-bg);
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-muted);
}

/* === Pie de página === */
.pie-pagina {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-line);
  text-align: center;
}

.pie-pagina p {
  font-family: var(--fuente-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--color-muted);
}

/* === Utilidades === */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* === Botón "Agregar a" en cada resultado === */
.btn-agregar {
  margin-left: auto;
  flex-shrink: 0;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--color-line);
  background-color: transparent;
  color: var(--color-text);
  font-family: var(--fuente-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--radio);
  cursor: pointer;
  white-space: nowrap;
}

.btn-agregar:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* === Modal "Agregar a una playlist" === */
.modal-subtitulo {
  font-family: var(--fuente-mono);
  font-size: 0.78rem;
  color: var(--color-muted);
  margin-bottom: 1rem;
}

#titulo-modal-agregar {
  margin-bottom: 0.35rem;
}

.lista-opciones-playlist {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 240px;
  overflow-y: auto;
}

.opcion-playlist {
  display: block;
  width: 100%;
  padding: 0.65rem 0.8rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radio);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--fuente-cuerpo);
  font-size: 0.9rem;
  text-align: left;
  cursor: pointer;
  transition:
    border-color var(--transicion),
    color var(--transicion);
}

.opcion-playlist:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.opcion-playlist span {
  font-family: var(--fuente-mono);
  font-size: 0.72rem;
  color: var(--color-muted);
  white-space: nowrap;
}

.agregar-vacio {
  font-family: var(--fuente-mono);
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-bottom: 1rem;
}

.btn-crear-desde-agregar {
  width: 100%;
  padding: 0.65rem 0.8rem;
  border: 1px dashed var(--color-accent);
  border-radius: var(--radio);
  background: transparent;
  color: var(--color-accent);
  font-family: var(--fuente-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.btn-crear-desde-agregar:hover {
  background-color: rgba(var(--accent-rgb), 0.1);
}

#btn-cerrar-agregar {
  border: 1px solid var(--color-line);
  background: transparent;
  color: var(--color-muted);
}

#btn-cerrar-agregar:hover {
  color: var(--color-text);
  border-color: var(--color-muted);
}

.input-filtro-playlist {
  width: 100%;
  padding: 0.55rem 0.7rem;
  margin-bottom: 0.75rem;
  border: 1px solid var(--color-line);
  background-color: var(--color-bg);
  color: var(--color-text);
  border-radius: var(--radio);
  font-family: var(--fuente-mono);
  font-size: 0.85rem;
}

.input-filtro-playlist:focus-visible {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.18);
}

.opciones-vacio {
  font-family: var(--fuente-mono);
  font-size: 0.8rem;
  color: var(--color-muted);
  padding: 0.5rem 0;
}

/* Botón de preview */
.btn-preview {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--color-line);
  background-color: transparent;
  color: var(--color-text);
  font-size: 0.85rem;
  border-radius: 50%;
  cursor: pointer;
  transition:
    color var(--transicion),
    border-color var(--transicion),
    background-color var(--transicion);
}

.btn-preview:hover:not(:disabled) {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-preview--activo {
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: 0 0 10px -2px rgba(var(--accent-rgb), 0.6);
}

.btn-preview:disabled {
  color: var(--color-muted);
  border-color: var(--color-line);
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-preview svg {
  display: block;
}

/* === Toast === */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-accent);
  color: var(--color-text);
  padding: 0.7rem 1.2rem;
  border-radius: var(--radio);
  font-family: var(--fuente-mono);
  font-size: 0.8rem;
  box-shadow: 0 12px 30px -14px rgba(0, 0, 0, 0.9);
  z-index: 20;
}

.toast.oculto {
  display: none;
}

/* ============================================================
   Mobile First: a partir de acá, mejoras progresivas para
   pantallas más grandes que un celular (>480px).
   ============================================================ */

@media (min-width: 481px) {
  body {
    padding: 2rem 1.5rem 4rem;
  }

  .masthead {
    gap: 1rem;
    padding: 1rem 1.1rem 1.25rem;
  }

  #form-busqueda {
    flex-direction: row;
  }

  #btn-buscar {
    width: auto;
  }

  .tab-btn {
    font-size: 0.85rem;
    padding: 0.65rem 0.75rem;
  }
}