/* Button Base Styles */
.zero-button {
  font-family: inherit;
  font-weight: 500;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: all 0.2s ease-in-out;
  position: relative;
  overflow: hidden;
  outline: none;
  box-sizing: border-box;
}

.zero-button:focus {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* Button Sizes */
.zero-button--small {
  padding: 6px 12px;
  font-size: 0.875rem;
  line-height: 1.25rem;
  min-height: 32px;
}

.zero-button--medium {
  padding: 8px 16px;
  font-size: 1rem;
  line-height: 1.5rem;
  min-height: 40px;
}

.zero-button--large {
  padding: 12px 24px;
  font-size: 1.125rem;
  line-height: 1.75rem;
  min-height: 48px;
}

/* Button Variants */
.zero-button--primary {
  background-color: #3b82f6;
  color: white;
  border: 1px solid #3b82f6;
}

.zero-button--primary:hover {
  background-color: #2563eb;
  border-color: #2563eb;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(59, 130, 246, 0.3);
}

.zero-button--secondary {
  background-color: #6b7280;
  color: white;
  border: 1px solid #6b7280;
}

.zero-button--secondary:hover {
  background-color: #4b5563;
  border-color: #4b5563;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(107, 114, 128, 0.3);
}

.zero-button--success {
  background-color: #10b981;
  color: white;
  border: 1px solid #10b981;
}

.zero-button--success:hover {
  background-color: #059669;
  border-color: #059669;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(16, 185, 129, 0.3);
}

.zero-button--danger {
  background-color: #ef4444;
  color: white;
  border: 1px solid #ef4444;
}

.zero-button--danger:hover {
  background-color: #dc2626;
  border-color: #dc2626;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(239, 68, 68, 0.3);
}

.zero-button--warning {
  background-color: #f59e0b;
  color: white;
  border: 1px solid #f59e0b;
}

.zero-button--warning:hover {
  background-color: #d97706;
  border-color: #d97706;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(245, 158, 11, 0.3);
}

.zero-button--info {
  background-color: #06b6d4;
  color: white;
  border: 1px solid #06b6d4;
}

.zero-button--info:hover {
  background-color: #0891b2;
  border-color: #0891b2;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(6, 182, 212, 0.3);
}

.zero-button--outline {
  background-color: transparent;
  color: #3b82f6;
  border: 1px solid #3b82f6;
}

.zero-button--outline:hover {
  background-color: #3b82f6;
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(59, 130, 246, 0.3);
}

/* Disabled State */
.zero-button--disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.zero-button--disabled:hover {
  transform: none;
  box-shadow: none;
}

/* Loading Animation */
.zero-button--loading {
  position: relative;
  color: transparent;
}

.zero-button--loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid #ffffff;
  border-radius: 50%;
  border-top-color: transparent;
  animation: button-loading-spinner 1s ease infinite;
}

@keyframes button-loading-spinner {
  from {
    transform: rotate(0turn);
  }
  to {
    transform: rotate(1turn);
  }
}