/* Button components */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  gap: var(--spacing-xs);
}

.btn:focus {
  outline: 0;
  box-shadow: 0 0 0 2px rgba(var(--primary-color), 0.25);
}

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

/* Button variants */
.btn-primary {
  color: var(--white);
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  color: var(--text-primary);
  background-color: var(--background-light);
  border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: #e9ecef;
  border-color: #adb5bd;
}

.btn-outline {
  color: var(--primary-color);
  background-color: transparent;
  border-color: var(--primary-color);
}

.btn-outline:hover:not(:disabled) {
  color: var(--white);
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-success {
  color: var(--white);
  background-color: var(--success-color);
  border-color: var(--success-color);
}

.btn-success:hover:not(:disabled) {
  background-color: #218838;
  border-color: #1e7e34;
}

.btn-warning {
  color: var(--white);
  background-color: var(--warning-color);
  border-color: var(--warning-color);
}

.btn-warning:hover:not(:disabled) {
  background-color: #e0a800;
  border-color: #d39e00;
}

.btn-error {
  color: var(--white);
  background-color: var(--error-color);
  border-color: var(--error-color);
}

.btn-error:hover:not(:disabled) {
  background-color: #c82333;
  border-color: #bd2130;
}

.btn-ghost {
  color: var(--text-primary);
  background-color: transparent;
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--background-light);
}

/* Button sizes */
.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-lg);
}

.btn-full {
  width: 100%;
}

/* Special button styles */
.btn-google {
  color: var(--text-primary);
  background-color: var(--white);
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-google:hover:not(:disabled) {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-google img {
  width: 18px;
  height: 18px;
}

/* Icon buttons */
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-full);
}

.btn-icon.btn-sm {
  width: 32px;
  height: 32px;
}

.btn-icon.btn-lg {
  width: 48px;
  height: 48px;
}

/* Button groups */
.btn-group {
  display: inline-flex;
  vertical-align: middle;
}

.btn-group > .btn {
  position: relative;
  flex: 1 1 auto;
}

.btn-group > .btn:not(:first-child) {
  margin-left: -1px;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}

.btn-group > .btn:not(:last-child) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.btn-group > .btn:focus,
.btn-group > .btn:hover {
  z-index: 1;
}

/* Floating action button */
.btn-fab {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 56px;
  height: 56px;
  padding: 0;
  font-size: var(--font-size-lg);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
}

.btn-fab:hover:not(:disabled) {
  transform: scale(1.1);
  box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}

/* Button loading state */
.btn.loading {
  color: transparent;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin-top: -8px;
  margin-left: -8px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
  .btn-fab {
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 48px;
    height: 48px;
    font-size: var(--font-size-base);
  }
  
  .btn-full-mobile {
    width: 100%;
  }
}