:root {
  --bg-main: #000000;
  --bg-panel: #0a0a0a;
  --bg-panel-soft: #050505;
  --border-soft: #222222;
  --border-strong: #333333;
  --text-main: #f5f5f5;
  --text-muted: #a0a0a0;
  --text-subtle: #888888;
  --control-bg: #111111;
  --control-bg-hover: #1a1a1a;
  --accent-light: #e0e0e0;
}

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

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  background: var(--bg-main);
  color: var(--text-main);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

#app {
  min-height: 100vh;
  display: flex;
}

/* PANTALLAS */

.screen {
  display: none;
  width: 100%;
  align-items: center;
  justify-content: center;
}

.screen-visible {
  display: flex;
}

.screen-player {
  flex-direction: column;
}

/* DROPZONE */

.dropzone {
  position: relative;
  max-width: 480px;
  width: 80%;
  border-radius: 8px;
  padding: 48px 32px;
  border: 1px dashed var(--border-strong);
  background: #111111;
  text-align: center;
  transition:
    border-color 0.15s ease,
    background-color 0.15s ease,
    transform 0.15s ease;
}

.dropzone:hover {
  border-color: #555555;
  background: #181818;
  transform: translateY(-1px);
}

.dropzone.drag-over {
  border-color: #a0a0a0;
  background: #181818;
}

.dropzone-icon {
  width: 64px;
  height: 64px;
  display: block;
  margin: 0 auto 16px;
  opacity: 0.9;
}

.dropzone-title {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--text-main);
}

.dropzone-subtitle {
  margin: 0;
  font-size: 13px;
  color: var(--text-subtle);
}

/* Input oculto encima de la dropzone para hacer clic */

#file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

/* PANTALLA CARGANDO */

.loading-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.spinner {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 3px solid #333333;
  border-top-color: #e0e0e0;
  animation: spin 0.9s linear infinite;
}

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

.loading-title {
  margin: 0;
  font-size: 16px;
  color: var(--text-main);
}

.loading-subtitle {
  margin: 0;
  font-size: 13px;
  color: var(--text-subtle);
}

/* HEADER + EDITOR DE NOMBRE */

#header {
  padding: 16px 32px 8px;
  font-size: 13px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-soft);
  background: var(--bg-main);
  display: flex;
  align-items: center;
  justify-content: center;
}

#file-name-editor {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

#file-name-input {
  background: transparent;
  border: none;
  padding: 0;
  min-width: 80px;
  max-width: 320px;
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  outline: none;
}

#file-name-input::placeholder {
  color: var(--text-subtle);
}

/* Ocultamos la extensión en el header */
.file-ext {
  display: none;
}

/* MAIN */

#main {
  flex: 1;
  width: 100%;
  padding: 24px 20px 96px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* WAVEFORMS */

.waveform-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.waveform-label {
  font-size: 12px;
  color: var(--text-muted);
  padding: 0 4px;
}

.waveform-container {
  position: relative;
  background: #050505;
  border-radius: 0;
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  border-left: none;
  border-right: none;
  height: 160px;
  overflow: hidden;
}

/* Scroll horizontal + inner para el zoom */

.waveform-scroll {
  width: 100%;
  height: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}

/* Scrollbar gruesa y visible (Chrome/Edge/Safari) */
.waveform-scroll::-webkit-scrollbar {
  height: 12px;
}

.waveform-scroll::-webkit-scrollbar-track {
  background: #111111;
}

.waveform-scroll::-webkit-scrollbar-thumb {
  background: #555555;
  border-radius: 6px;
}

.waveform-scroll::-webkit-scrollbar-thumb:hover {
  background: #888888;
}

/* Firefox */
.waveform-scroll {
  scrollbar-color: #555555 #111111;
  scrollbar-width: auto;
}

.waveform-inner {
  width: 100%;   /* se ampliará con zoom (100%, 200%, etc.) */
  height: 100%;
}

.waveform-container canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* BARRA TRANSPORTE */

#transport-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 72px;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #050505;
  border-top: 1px solid var(--border-soft);
  z-index: 10;
}

.transport-left,
.transport-center,
.transport-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.transport-label {
  font-size: 13px;
  color: var(--text-muted);
  display: none; /* ocultar texto "Escuchar" */
}

/* TOGGLE PISTA */

.toggle-group {
  display: inline-flex;
  padding: 2px;
  background: #050505;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
}

.toggle-button {
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-main);
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition:
    background-color 0.15s ease,
    color 0.15s ease,
    transform 0.12s ease;
}

.toggle-button:hover {
  background: #151515;
  color: #ffffff; /* texto blanco en hover */
}

.toggle-button-active {
  background: #f5f5f5;
  color: #000000;
}

/* El activo no cambia color en hover para evitar blanco sobre blanco */
.toggle-button-active:hover {
  background: #f5f5f5;
  color: #000000;
}

/* ICONOS COMO MÁSCARAS (permite cambiar "fill" con background-color) */

.icon {
  display: inline-block;
  width: 18px;
  height: 18px;
  background-color: #f5f5f5;
  mask-repeat: no-repeat;
  mask-position: center;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
  -webkit-mask-size: contain;
}

/* Cada icono usa su SVG como máscara */
.icon-headphones {
  mask-image: url('svg/icon-headphones.svg');
  -webkit-mask-image: url('svg/icon-headphones.svg');
}

.icon-skip-back-10 {
  mask-image: url('svg/icon-skip-back-10.svg');
  -webkit-mask-image: url('svg/icon-skip-back-10.svg');
}

.icon-play {
  mask-image: url('svg/icon-play.svg');
  -webkit-mask-image: url('svg/icon-play.svg');
}

.icon-pause {
  mask-image: url('svg/icon-pause.svg');
  -webkit-mask-image: url('svg/icon-pause.svg');
}

.icon-skip-forward-10 {
  mask-image: url('svg/icon-skip-forward-10.svg');
  -webkit-mask-image: url('svg/icon-skip-forward-10.svg');
}

.icon-download {
  mask-image: url('svg/icon-download.svg');
  -webkit-mask-image: url('svg/icon-download.svg');
}

.icon-zoom-in {
  mask-image: url('svg/icon-zoom-in.svg');
  -webkit-mask-image: url('svg/icon-zoom-in.svg');
}

.icon-zoom-out {
  mask-image: url('svg/icon-zoom-out.svg');
  -webkit-mask-image: url('svg/icon-zoom-out.svg');
}

.icon-zoom-fit {
  mask-image: url('svg/icon-zoom-fit.svg');
  -webkit-mask-image: url('svg/icon-zoom-fit.svg');
}

/* Tamaño específico para cascos en la izquierda */

.transport-left .icon-headphones {
  width: 20px;
  height: 20px;
  background-color: #e0e0e0;
}

/* CONTROLES DE TRANSPORTE */

.control-button {
  border: none;
  outline: none;
  background: var(--control-bg);
  border-radius: 999px;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 1px solid var(--border-soft);
  transition:
    background-color 0.15s ease,
    transform 0.12s ease,
    border-color 0.15s ease;
}

/* Botones de zoom un pelín más pequeños */

.control-button-small {
  width: 36px;
  height: 36px;
}

/* Iconos claros siempre en botones normales */
.control-button .icon {
  background-color: #f5f5f5;
}

.control-button-main {
  width: 44px;
  height: 44px;
  background: #f5f5f5;
  border-color: #f5f5f5;
}

/* Icono del botón principal: negro sobre fondo claro */
.control-button-main .icon {
  background-color: #000000;
}

.control-button:hover:not(:disabled) {
  background: var(--control-bg-hover);
  border-color: #555555;
  transform: translateY(-1px);
}

/* No cambiamos el color del icono en hover, se mantiene el de base */

.control-button-main:hover:not(:disabled) {
  background: #ffffff;
  border-color: #ffffff;
  transform: translateY(-1px);
}

.control-button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* CONTROLES DE ZOOM */

.zoom-controls {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-right: 12px;
}

/* BOTÓN DESCARGAR */

.download-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid #444444;
  background: #111111;
  color: #e0e0e0;
  font-size: 13px;
  cursor: pointer;
  outline: none;
  transition:
    background-color 0.15s ease,
    border-color 0.15s ease,
    transform 0.12s ease,
    opacity 0.15s ease;
}

.download-button .icon {
  background-color: #e0e0e0;
}

.download-button:hover:not(:disabled) {
  background: #1a1a1a;
  border-color: #666666;
  transform: translateY(-1px);
}

.download-button:hover:not(:disabled) .icon {
  background-color: #ffffff;
}

.download-button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.download-button:disabled .icon {
  background-color: #555555;
}

/* RESPONSIVE */

@media (max-width: 768px) {
  #main {
    padding: 16px 12px 96px;
  }

  #transport-bar {
    padding: 0 16px;
  }

  .transport-left {
    display: none; /* se oculta en móviles para ganar espacio */
  }

  .waveform-container {
    height: 120px;
  }
}