/* ===================================
   AUTHENTICATION STYLES - PROFESSIONAL DESIGN
   Sistema de Autenticación - StudyQuality
   ================================== */

/* Header principal del sistema */
.header {
  text-align: center;
  margin-bottom: 3rem;
  padding: 2rem 0;
}

.header-content h1 {
  color: #ffffff;
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -1px;
  line-height: 1.1;
  background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 3px 6px rgba(0, 0, 0, 0.4);
}

.header-content p {
  color: #ffffff !important;
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
  opacity: 0.9;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* Específicamente para el subtítulo */
.header-content p:contains("Prototipo basado en principios") {
  color: #ffffff !important;
}

.version-info {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 0;
}

.version-info .version,
.version-info .build {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #ffffff;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

/* Contenedor principal de autenticación */
.auth-section {
  background: #ffffff;
  padding: 3rem 2.5rem;
  border-radius: 16px;
  margin: 2rem auto;
  box-shadow: 
    0 20px 60px rgba(0, 0, 0, 0.08),
    0 8px 25px rgba(0, 0, 0, 0.06),
    0 3px 10px rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.8);
  max-width: 460px;
  position: relative;
  backdrop-filter: blur(20px);
  animation: slideInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.auth-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 16px 16px 0 0;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.auth-container {
  width: 100%;
}

/* Logo o icono superior */
.auth-section::after {
  content: '🏢';
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Pestañas de autenticación */
.auth-tabs {
  display: flex;
  margin-bottom: 2.5rem;
  border-radius: 12px;
  background: #f8f9fa;
  padding: 4px;
  position: relative;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

.tab-button {
  flex: 1;
  padding: 12px 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  color: #6c757d;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  border-radius: 8px;
  z-index: 2;
}

.tab-button.active {
  background: #ffffff;
  color: #495057;
  font-weight: 600;
  box-shadow: 
    0 2px 8px rgba(0, 0, 0, 0.08),
    0 1px 3px rgba(0, 0, 0, 0.05);
  transform: none;
}

.tab-button:hover:not(.active) {
  color: #495057;
  background: rgba(255, 255, 255, 0.5);
}

/* Contenido de las pestañas */
.tab-content {
  display: none;
  animation: fadeInContent 0.4s ease-out;
}

.tab-content.active {
  display: block;
}

@keyframes fadeInContent {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Encabezados de formularios */
.form-header {
  text-align: center;
  margin-bottom: 2rem;
}

.form-header h2 {
  color: #ffffff;
  margin-bottom: 8px;
  font-weight: 700;
  font-size: 28px;
  letter-spacing: -0.5px;
  line-height: 1.2;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.form-header p {
  color: #ffffff;
  font-size: 15px;
  margin-bottom: 0;
  line-height: 1.4;
  font-weight: 500;
  opacity: 0.9;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* Formularios de autenticación */
.auth-form {
  width: 100%;
}

.form-group {
  margin-bottom: 1.5rem;
  position: relative;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #ffffff !important;
  font-size: 15px;
  letter-spacing: 0.01em;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* Asegurar que TODOS los labels sean blancos */
label[for="loginEmail"],
label[for="loginPassword"],
label[for="regName"], 
label[for="regEmail"],
label[for="regPassword"],
label[for="regRole"],
label[for="modalName"],
label[for="modalEmail"],
label[for="modalRole"] {
  color: #ffffff !important;
  font-weight: 600 !important;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3) !important;
}

/* Regla general para todos los labels en el auth-section */
.auth-section label,
.auth-section .form-group label,
.tab-content label {
  color: #ffffff !important;
  font-weight: 600 !important;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3) !important;
}

/* Asegurar que los títulos de formulario sean blancos */
.form-header h2,
#loginTab .form-header h2,
#registerTab .form-header h2 {
  color: #ffffff !important;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3) !important;
}

/* Asegurar que los subtítulos de formulario sean blancos */
.form-header p,
#loginTab .form-header p,
#registerTab .form-header p {
  color: #ffffff !important;
  opacity: 0.9;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3) !important;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 16px 20px;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  font-size: 16px;
  font-family: inherit;
  background: #ffffff;
  color: #111827;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-sizing: border-box;
  line-height: 1.5;
}

.form-group input::placeholder {
  color: #9ca3af;
  font-weight: 400;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 
    0 0 0 3px rgba(102, 126, 234, 0.1),
    0 1px 3px rgba(0, 0, 0, 0.1);
  background: #ffffff;
  transform: translateY(-1px);
}

.form-group input:hover:not(:focus),
.form-group select:hover:not(:focus),
.form-group textarea:hover:not(:focus) {
  border-color: #d1d5db;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* Estados de validación */
.form-group input:valid:not(:focus):not(:placeholder-shown) {
  border-color: #10b981;
  background: #f0fdf4;
}

.form-group input:invalid:not(:focus):not(:placeholder-shown) {
  border-color: #ef4444;
  background: #fef2f2;
}

/* Campo de contraseña con toggle */
.password-field {
  position: relative;
  display: flex;
  align-items: center;
}

.password-field input {
  padding-right: 55px;
}

.password-toggle {
  position: absolute;
  right: 20px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 18px;
  color: #6b7280;
  transition: all 0.2s ease;
  z-index: 10;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
}

.password-toggle:hover {
  color: #374151;
  background: #f3f4f6;
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  min-height: 56px;
  width: 100%;
  letter-spacing: 0.025em;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* Botón primario */
.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #ffffff;
  box-shadow: 
    0 4px 14px rgba(102, 126, 234, 0.3),
    0 2px 6px rgba(0, 0, 0, 0.08);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
  transform: translateY(-2px);
  box-shadow: 
    0 8px 25px rgba(102, 126, 234, 0.4),
    0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 
    0 4px 14px rgba(102, 126, 234, 0.3),
    0 2px 6px rgba(0, 0, 0, 0.08);
}

/* Botón outline */
.btn-outline {
  background: #ffffff;
  color: #667eea;
  border: 2px solid #e5e7eb;
  font-weight: 500;
}

.btn-outline:hover:not(:disabled) {
  background: #f8f9fa;
  border-color: #667eea;
  color: #5a6fd8;
  transform: translateY(-1px);
  box-shadow: 
    0 4px 12px rgba(102, 126, 234, 0.15),
    0 2px 4px rgba(0, 0, 0, 0.05);
}

/* Credenciales de demo */
.demo-credentials {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  padding: 24px;
  border-radius: 16px;
  margin-top: 32px;
  border: 1px solid #e9ecef;
  text-align: center;
  position: relative;
  box-shadow: 
    0 2px 8px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.demo-credentials::before {
  content: 'DEMO';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #ffffff;
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  border-radius: 20px;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.demo-credentials h4 {
  color: #1f2937;
  margin-bottom: 16px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.demo-credentials p {
  color: #495057;
  font-size: 14px;
  margin: 8px 0;
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
  background: #ffffff;
  padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid #e9ecef;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 500;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.demo-credentials p strong {
  color: #667eea !important;
  font-weight: 600;
}

/* Asegurar que las etiquetas de credenciales demo sean visibles */
.demo-credentials p {
  color: #495057 !important;
  font-size: 14px;
  margin: 8px 0;
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
  background: #ffffff !important;
  padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid #e9ecef;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 500;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* Errores de formulario */
.form-error {
  display: block;
  color: #ef4444;
  font-size: 13px;
  margin-top: 8px;
  font-weight: 500;
  opacity: 0;
  transform: translateY(-5px);
  transition: all 0.3s ease;
}

.form-error.active {
  opacity: 1;
  transform: translateY(0);
}

.form-group.has-error input,
.form-group.has-error select {
  border-color: #ef4444;
  background: #fef2f2;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
  .header-content h1 {
    font-size: 36px;
  }
  
  .header-content p {
    font-size: 15px;
  }
  
  .version-info {
    flex-wrap: wrap;
    gap: 12px;
  }
  
  .auth-section {
    padding: 2rem 1.5rem;
    margin: 1rem;
    border-radius: 12px;
  }
  
  .form-header h2 {
    font-size: 24px;
  }
  
  .form-group input,
  .form-group select {
    padding: 14px 16px;
    font-size: 16px;
  }
  
  .btn {
    padding: 14px 24px;
    min-height: 50px;
  }
  
  .demo-credentials {
    padding: 20px;
    margin-top: 24px;
  }
}

@media (max-width: 480px) {
  .header-content h1 {
    font-size: 28px;
  }
  
  .header-content p {
    font-size: 14px;
  }
  
  .version-info .version,
  .version-info .build {
    font-size: 11px;
    padding: 5px 12px;
  }
  
  .auth-section {
    padding: 1.5rem 1rem;
    margin: 0.5rem;
  }
  
  .tab-button {
    padding: 10px 16px;
    font-size: 14px;
  }
  
  .form-header h2 {
    font-size: 22px;
  }
  
  .demo-credentials p {
    font-size: 13px;
    padding: 10px 12px;
  }
}

/* Modo oscuro */
@media (prefers-color-scheme: dark) {
  .header-content h1 {
    color: #f9fafb;
    background: linear-gradient(135deg, #f9fafb 0%, #e5e7eb 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  
  .header-content p {
    color: #d1d5db;
  }
  
  .auth-section {
    background: #1f2937;
    border-color: #374151;
    color: #f9fafb;
  }
  
  .form-header h2 {
    color: #f9fafb;
  }
  
  .form-header p {
    color: #d1d5db;
  }
  
  .form-group label {
    color: #f3f4f6;
    font-weight: 600;
  }
  
  .form-group input,
  .form-group select {
    background: #374151;
    border-color: #4b5563;
    color: #f9fafb;
  }
  
  .form-group input:focus,
  .form-group select:focus {
    background: #374151;
    border-color: #667eea;
  }
  
  .demo-credentials {
    background: #374151;
    border-color: #4b5563;
  }
  
  .demo-credentials h4 {
    color: #f9fafb;
  }
  
  .demo-credentials p {
    background: #4b5563;
    border-color: #6b7280;
    color: #e5e7eb;
  }
  
  .auth-tabs {
    background: #374151;
  }
  
  .tab-button {
    color: #9ca3af;
  }
  
  .tab-button.active {
    background: #4b5563;
    color: #f9fafb;
  }
}

/* Accesibilidad */
@media (prefers-reduced-motion: reduce) {
  .auth-section,
  .tab-content,
  .btn,
  .form-group input,
  .form-group select {
    animation: none;
    transition: none;
  }
}

/* Estados de focus mejorados para navegación por teclado */
.tab-button:focus,
.btn:focus,
.form-group input:focus,
.form-group select:focus {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

/* Loading states */
.form-loading {
  position: relative;
  pointer-events: none;
}

.form-loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 16px;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Botón de credenciales demo */
.demo-btn {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff;
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 12px;
}

.demo-btn:hover {
  background: linear-gradient(135deg, #059669 0%, #047857 100%);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}