.container {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.main-card {
  animation: fadeIn 0.5s ease;
}

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

.form-header {
  text-align: center;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--glass-border);
  margin-bottom: 2rem;
}

.form-header h1 {
  margin-bottom: 0.5rem;
}

.form-header p {
  color: var(--text-secondary);
  font-size: 1rem;
}

.form-help {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.form-help a {
  color: var(--accent-color);
  text-decoration: none;
}

.form-help a:hover {
  text-decoration: underline;
}

/* Scale input (para tiempo dedicado) */
.scale-group {
  background: rgba(255, 255, 255, 0.05);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
}

.scale-labels {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding: 0 1rem;
}

.scale-labels span {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.875rem;
}

.scale-options {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.scale-label {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.scale-inputs {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.scale-option {
  flex: 1;
  display: flex;
  justify-content: center;
  cursor: pointer;
  position: relative;
}

.scale-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.scale-dot {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid var(--glass-border);
  display: block;
  transition: all 0.3s ease;
}

.scale-option:hover .scale-dot {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--accent-color);
}

.scale-option input[type="radio"]:checked + .scale-dot {
  background: var(--secondary-color);
  border-color: var(--secondary-color);
  box-shadow: 0 0 20px rgba(147, 51, 234, 0.6);
}

/* Checkbox exclusivo (solo uno seleccionable) */
.checkbox-group input[type="checkbox"] {
  accent-color: var(--secondary-color);
}

.form-actions {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--glass-border);
}

.file-name {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-style: italic;
}

/* Responsive */
@media (max-width: 768px) {
  .scale-labels {
    font-size: 0.75rem;
  }

  .scale-dot {
    width: 32px;
    height: 32px;
  }
}