/* Login Screen Styles - Versión Mejorada */

/* Fondo animado con partículas flotantes */
.login-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  overflow: hidden;
}

/* Efecto de partículas flotantes en el fondo */
.login-screen::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 25% 25%, rgba(79, 209, 199, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(49, 151, 149, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(44, 82, 130, 0.05) 0%, transparent 50%);
  background-size: 300px 300px, 400px 400px, 500px 500px;
  background-position: 0 0, 100px 100px, 200px 200px;
  animation: float-particles 20s ease-in-out infinite;
  pointer-events: none;
}

@keyframes float-particles {
  0%, 100% { 
    transform: translate(0, 0) rotate(0deg);
    opacity: 0.3;
  }
  33% { 
    transform: translate(50px, -50px) rotate(120deg);
    opacity: 0.6;
  }
  66% { 
    transform: translate(-30px, 30px) rotate(240deg);
    opacity: 0.4;
  }
}

/* Contenedor principal del login */
.login-container {
  background: var(--card-bg);
  padding: var(--space-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl), 0 0 50px rgba(79, 209, 199, 0.1);
  width: 100%;
  max-width: 420px;
  margin: var(--space-lg);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(79, 209, 199, 0.2);
  animation: slide-up 0.6s ease-out;
}

@keyframes slide-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Línea superior animada */
.login-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
  animation: slide-line 1.5s ease-out 0.3s forwards;
}

@keyframes slide-line {
  to {
    left: 0;
  }
}

/* Efecto de brillo sutil */
.login-container::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    transparent,
    rgba(79, 209, 199, 0.03),
    transparent
  );
  transform: rotate(45deg);
  animation: shine 3s ease-in-out infinite;
  pointer-events: none;
}

@keyframes shine {
  0%, 100% { 
    transform: rotate(45deg) translateX(-100%);
  }
  50% { 
    transform: rotate(45deg) translateX(100%);
  }
}

/* Header del login */
.login-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
  position: relative;
  z-index: 1;
}

.login-header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  position: relative;
  animation: fade-in 0.8s ease-out 0.2s both;
}

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

.login-header h1 i {
  color: var(--accent-teal);
  font-size: 2.2rem;
  animation: pulse-icon 2s ease-in-out infinite;
  filter: drop-shadow(0 0 10px rgba(79, 209, 199, 0.3));
}

@keyframes pulse-icon {
  0%, 100% { 
    transform: scale(1);
    filter: drop-shadow(0 0 10px rgba(79, 209, 199, 0.3));
  }
  50% { 
    transform: scale(1.05);
    filter: drop-shadow(0 0 15px rgba(79, 209, 199, 0.5));
  }
}

.login-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  animation: fade-in 0.8s ease-out 0.4s both;
}

/* Formulario de login */
.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  position: relative;
  z-index: 1;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  animation: fade-in 0.8s ease-out 0.6s both;
}

.form-group:nth-child(2) {
  animation-delay: 0.7s;
}

.form-group label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.875rem;
  letter-spacing: 0.025em;
  transition: color var(--transition-normal);
}

/* Inputs mejorados */
.login-form .form-input {
  padding: var(--space-md) var(--space-lg);
  font-size: 1rem;
  background: var(--input-bg);
  border: 2px solid rgba(79, 209, 199, 0.2);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-primary);
  transition: all var(--transition-normal);
  position: relative;
}

.login-form .form-input:focus {
  outline: none;
  border-color: var(--accent-teal);
  background: rgba(74, 85, 104, 0.8);
  transform: translateY(-2px);
  box-shadow: 
    0 0 0 3px rgba(79, 209, 199, 0.15),
    var(--shadow-lg),
    0 0 20px rgba(79, 209, 199, 0.2);
}

.login-form .form-input::placeholder {
  color: var(--text-muted);
  transition: opacity var(--transition-normal);
}

.login-form .form-input:focus::placeholder {
  opacity: 0.7;
}

/* Botón de login con efectos avanzados */
.login-btn {
  background: var(--gradient-accent);
  color: var(--text-primary);
  padding: var(--space-lg) var(--space-xl);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  margin-top: var(--space-md);
  box-shadow: var(--shadow-md);
  animation: fade-in 0.8s ease-out 0.8s both;
}

.login-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

.login-btn:hover {
  transform: translateY(-3px);
  box-shadow: 
    var(--shadow-lg), 
    0 0 25px rgba(79, 209, 199, 0.4);
  filter: brightness(1.1);
}

.login-btn:hover::before {
  left: 100%;
}

.login-btn:active {
  transform: translateY(-1px);
}

.login-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
  filter: grayscale(0.3);
}

.login-btn span {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
}

/* Estados de carga */
.login-btn.loading {
  pointer-events: none;
  animation: pulse-loading 1.5s ease-in-out infinite;
}

@keyframes pulse-loading {
  0%, 100% { 
    opacity: 1;
    transform: scale(1);
  }
  50% { 
    opacity: 0.8;
    transform: scale(1.02);
  }
}

.login-btn.loading span {
  opacity: 0;
}

.login-btn.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 22px;
  height: 22px;
  margin-top: -11px;
  margin-left: -11px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top: 3px solid var(--text-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Mensaje de error mejorado */
.login-error {
  background: linear-gradient(135deg, rgba(229, 62, 62, 0.15), rgba(229, 62, 62, 0.05));
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  text-align: center;
  margin-top: var(--space-md);
  position: relative;
  overflow: hidden;
  animation: shake 0.6s ease-in-out, fade-in-error 0.3s ease-out;
}

@keyframes shake {
  0%, 20%, 40%, 60%, 80%, 100% { 
    transform: translateX(0); 
  }
  10%, 30%, 50%, 70%, 90% { 
    transform: translateX(-8px); 
  }
}

@keyframes fade-in-error {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-error::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--danger);
  animation: slide-error-line 0.3s ease-out 0.1s both;
}

@keyframes slide-error-line {
  from {
    transform: scaleY(0);
    transform-origin: top;
  }
  to {
    transform: scaleY(1);
  }
}

/* Indicador de estado de conexión */
.connection-status {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 10px rgba(56, 161, 105, 0.5);
  animation: pulse-connection 2s ease-in-out infinite;
}

@keyframes pulse-connection {
  0%, 100% { 
    transform: scale(1);
    opacity: 1;
  }
  50% { 
    transform: scale(1.2);
    opacity: 0.7;
  }
}

.connection-status.offline {
  background: var(--danger);
  box-shadow: 0 0 10px rgba(229, 62, 62, 0.5);
}

/* Versión del sistema */
.login-version {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  font-size: 0.75rem;
  opacity: 0.7;
  animation: fade-in 1s ease-out 1s both;
}

/* Responsive Design Mejorado */
@media (max-width: 480px) {
  .login-container {
    padding: var(--space-xl);
    margin: var(--space-md);
    max-width: 95%;
    border-radius: var(--radius-lg);
  }
  
  .login-header h1 {
    font-size: 1.75rem;
    gap: var(--space-sm);
  }
  
  .login-header h1 i {
    font-size: 2rem;
  }
  
  .login-form .form-input {
    padding: var(--space-lg);
    font-size: 1.1rem;
  }
  
  .login-btn {
    padding: var(--space-lg) var(--space-xl);
    font-size: 1.1rem;
  }
  
  .connection-status {
    top: var(--space-md);
    right: var(--space-md);
    width: 10px;
    height: 10px;
  }
}

@media (max-width: 320px) {
  .login-container {
    padding: var(--space-lg);
    margin: var(--space-sm);
  }
  
  .login-header h1 {
    font-size: 1.5rem;
    flex-direction: column;
    gap: var(--space-xs);
  }
}

/* Modo oscuro adicional */
@media (prefers-color-scheme: dark) {
  .login-container {
    box-shadow: 
      var(--shadow-xl), 
      0 0 50px rgba(79, 209, 199, 0.15),
      inset 0 1px 0 rgba(255, 255, 255, 0.05);
  }
}

/* Efectos adicionales para interacción */
.login-container:hover {
  box-shadow: 
    var(--shadow-xl), 
    0 0 60px rgba(79, 209, 199, 0.15);
}

.form-group:hover label {
  color: var(--accent-teal);
}

/* Animación de entrada para toda la pantalla */
.login-screen.entering {
  animation: screen-fade-in 0.8s ease-out both;
}

@keyframes screen-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Estados de formulario */
.form-group.has-value label {
  color: var(--accent-teal);
  transform: translateY(-2px);
}

.form-group.has-error .form-input {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.15);
}

.form-group.has-error label {
  color: var(--danger);
}