/* Importar fuentes de Google */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700&display=swap');

/* Variables CSS para consistencia */
:root {
  --primary-color: #4f46e5;
  --primary-dark: #3730a3;
  --secondary-color: #06b6d4;
  --accent-color: #f59e0b;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #f9fafb;
  --bg-dark: #0f172a;
  --bg-card: rgba(255, 255, 255, 0.1);
  --border-color: rgba(255, 255, 255, 0.2);
  --success-color: #10b981;
  --error-color: #ef4444;
  --warning-color: #f59e0b;
}

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

body {
  font-family: 'Montserrat', sans-serif;
  line-height: 1.6;
  color: var(--text-light);
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  min-height: 100vh;
}

/* Utilidades de accesibilidad */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Efectos de vidrio mejorados */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  transition: all 0.3s ease;
}

.glass-card:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Texto con gradiente */
.gradient-text {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Animaciones de scroll mejoradas */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Botones mejorados */
.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(79, 70, 229, 0.4);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Spinner de carga */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  display: inline-block;
  margin-right: 8px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Formulario mejorado */
.form-group {
  position: relative;
  margin-bottom: 1.5rem;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-light);
  font-size: 16px;
  transition: all 0.3s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Estados de validación */
.form-input.error {
  border-color: var(--error-color);
  background: rgba(239, 68, 68, 0.1);
}

.form-input.success {
  border-color: var(--success-color);
  background: rgba(16, 185, 129, 0.1);
}

.error-message {
  color: var(--error-color);
  font-size: 14px;
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.success-message {
  color: var(--success-color);
  font-size: 14px;
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Alertas mejoradas */
.alert {
  padding: 16px;
  border-radius: 8px;
  margin: 16px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
  animation: slideIn 0.3s ease;
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--success-color);
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--error-color);
}

.alert-close {
  position: absolute;
  top: 8px;
  right: 8px;
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.alert-close:hover {
  opacity: 1;
}

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

/* Contador de caracteres */
.char-counter {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  text-align: right;
  margin-top: 4px;
}

.char-counter.warning {
  color: var(--warning-color);
}

.char-counter.error {
  color: var(--error-color);
}

/* Navegación mejorada */
.nav-link {
  position: relative;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

/* Mejoras de accesibilidad */
@media (prefers-reduced-motion: reduce) {
  .reveal-on-scroll,
  .btn-primary,
  .form-input,
  .alert {
    transition: none;
    animation: none;
  }
}

/* Responsive mejorado */
@media (max-width: 768px) {
  .glass-card {
    margin: 16px;
    padding: 20px;
  }
  
  .btn-primary {
    width: 100%;
    padding: 14px 24px;
  }
  
  .form-input {
    font-size: 16px; /* Previene zoom en iOS */
  }
}

/* Estados de focus mejorados para accesibilidad */
*:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Modo de alto contraste */
@media (prefers-contrast: high) {
  :root {
    --bg-card: rgba(255, 255, 255, 0.2);
    --border-color: rgba(255, 255, 255, 0.4);
  }
}