/* Variables CSS para fácil personalización */
:root {
  --primary-color: #1db954;
  --primary-hover: #1ed760;
  --secondary-color: #4cafef;
  --secondary-hover: #379bd6;
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --bg-tertiary: #1f1f1f;
  --bg-card: #181818;
  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --text-tertiary: #888;
  --border-color: #2a2a2a;
  --error-color: #ff4757;
  --success-color: #26de81;
  --warning-color: #ffd93d;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset y estilos base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Scrollbar personalizada */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 5px;
  transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* Body con gradiente sutil */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, var(--bg-primary) 0%, #0f0f0f 100%);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

/* Efecto de ruido de fondo sutil */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.03;
  z-index: -1;
  background-image: url("data:image/svg+xml,%3Csvg width='200' height='200' xmlns='http://www.w3.org/2000/svg'%3E%3Cdefs%3E%3Cfilter id='noise'%3E%3CfeTurbulence baseFrequency='0.9' numOctaves='4' /%3E%3C/filter%3E%3C/defs%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' /%3E%3C/svg%3E");
}

/* Navbar mejorada */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(31, 31, 31, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
  animation: slideDown 0.5s ease-out;
}

@keyframes slideDown {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Logo con efecto de brillo */
.logo {
  font-size: 1.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
  position: relative;
  animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
  from {
    text-shadow: 0 0 10px rgba(29, 185, 84, 0.5);
  }
  to {
    text-shadow: 0 0 20px rgba(29, 185, 84, 0.8), 0 0 30px rgba(29, 185, 84, 0.6);
  }
}

/* Botón de navegación mejorado */
.nav-btn {
  background: linear-gradient(135deg, #333, #444);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.nav-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: var(--primary-color);
  transform: translate(-50%, -50%);
  transition: width 0.4s, height 0.4s;
  z-index: -1;
}

.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

.nav-btn:hover::before {
  width: 300px;
  height: 300px;
}

.nav-btn:active {
  transform: translateY(0);
}

/* Contenedor principal */
.container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Caja de carga mejorada */
.upload-box {
  background: linear-gradient(135deg, var(--bg-card), rgba(24, 24, 24, 0.8));
  border: 2px dashed var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
  width: 100%;
  max-width: 500px;
}

.upload-box::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color), var(--primary-color));
  border-radius: 16px;
  opacity: 0;
  z-index: -1;
  transition: opacity var(--transition-smooth);
  background-size: 300% 300%;
  animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.upload-box:hover {
  border-color: transparent;
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.upload-box:hover::before {
  opacity: 1;
}

/* Etiqueta de carga con efecto de botón */
.upload-label {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--secondary-color), var(--secondary-hover));
  border-radius: 12px;
  transition: all var(--transition-smooth);
  position: relative;
  box-shadow: 0 4px 15px rgba(76, 175, 239, 0.3);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.upload-label::after {
  content: '📁';
  font-size: 1.2rem;
  transition: transform var(--transition-fast);
}

.upload-label:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(76, 175, 239, 0.4);
}

.upload-label:hover::after {
  transform: rotate(10deg) scale(1.1);
}

.upload-label:active {
  transform: scale(0.98);
}

/* Input de archivo oculto */
input[type="file"] {
  display: none;
}

/* Información del archivo con diseño de tarjeta */
.file-info {
  background: linear-gradient(135deg, var(--bg-card), rgba(24, 24, 24, 0.95));
  padding: 1.5rem 2rem;
  border-radius: 16px;
  width: 100%;
  max-width: 700px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.file-info::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
}

@keyframes scan {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Estilos para información del archivo */
.file-info p {
  margin: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.file-info strong {
  color: var(--text-primary);
  font-weight: 600;
  min-width: 100px;
}

/* Caja del reproductor con sombra elegante */
.player-box {
  width: 100%;
  max-width: 1000px;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 
    0 20px 60px rgba(0, 0, 0, 0.4),
    0 0 100px rgba(29, 185, 84, 0.1);
  margin-top: 2rem;
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  animation: fadeInScale 0.6s ease-out;
}

@keyframes fadeInScale {
  from {
    transform: scale(0.95);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.player-box::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  bottom: -1px;
  background: linear-gradient(45deg, var(--primary-color), transparent, var(--secondary-color));
  border-radius: 20px;
  opacity: 0;
  z-index: -1;
  transition: opacity var(--transition-smooth);
}

.player-box:hover::before {
  opacity: 0.3;
}

/* Video con bordes redondeados */
video {
  width: 100%;
  display: block;
  border-radius: 20px;
  background: #000;
}

/* Personalización de controles de Plyr */
.plyr {
  border-radius: 20px;
}

.plyr--video {
  background: #000;
  border-radius: 20px;
}

.plyr__control--overlaid {
  background: var(--primary-color) !important;
  border-radius: 50%;
  transition: all var(--transition-smooth);
}

.plyr__control--overlaid:hover {
  background: var(--primary-hover) !important;
}

/* Mensaje de error mejorado */
.error-message {
  color: var(--error-color);
  font-weight: 600;
  margin-top: 1rem;
  padding: 12px 20px;
  background: rgba(255, 71, 87, 0.1);
  border-left: 4px solid var(--error-color);
  border-radius: 8px;
  animation: shake 0.5s;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  75% { transform: translateX(10px); }
}

/* Responsive design */
@media (max-width: 768px) {
  .navbar {
    padding: 12px 16px;
  }
  
  .logo {
    font-size: 1.4rem;
  }
  
  .nav-btn {
    padding: 8px 16px;
    font-size: 0.9rem;
  }
  
  .container {
    padding: 1rem;
  }
  
  .upload-box {
    padding: 1.5rem;
  }
  
  .upload-label {
    padding: 12px 20px;
    font-size: 1rem;
  }
  
  .file-info {
    padding: 1rem 1.5rem;
    font-size: 0.9rem;
  }
  
  .player-box {
    margin-top: 1rem;
    border-radius: 12px;
  }
}

/* Animación de carga */
@keyframes pulse {
  0% { opacity: 1; }
  50% { opacity: 0.5; }
  100% { opacity: 1; }
}

.loading {
  animation: pulse 1.5s infinite;
}

/* Estados hover adicionales */
*:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Transiciones suaves para todos los elementos interactivos */
button, a, input, .clickable {
  transition: all var(--transition-fast);
}