/* Buttons, inputs, checkboxes, dropdowns, spinners */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-weight: 600;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-pill);
  transition: background-color var(--transition-base), transform 0.1s;
  white-space: nowrap;
  line-height: 1.4;
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-text-white);
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  color: var(--color-text-white);
  transform: scale(1.04);
}

.btn--primary:active {
  background-color: var(--color-accent-active);
  transform: scale(0.98);
}

.btn--primary:disabled,
.btn--primary.disabled {
  background-color: var(--color-text-muted);
  color: var(--color-text-secondary);
  opacity: 0.65;
  transform: none;
  cursor: not-allowed;
}

.btn--lg {
  padding: 12px 40px;
  font-size: var(--font-size-base);
}

.btn--sm {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-xs);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn--ghost:hover {
  color: var(--color-text-primary);
  border-color: var(--color-text-secondary);
}

/* Button group (split button) */
.btn-group {
  display: inline-flex;
  position: relative;
}

.btn-group .btn:first-child {
  border-radius: var(--radius-pill) 0 0 var(--radius-pill);
}

.btn-group .btn:nth-child(2) {
  border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
  padding-inline: var(--space-sm);
  border-left: 1px solid rgba(255, 255, 255, 0.2);
}

/* Dropdown */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  z-index: 50;
  min-width: 180px;
  margin-top: var(--space-xs);
  padding: var(--space-xs) 0;
  background-color: var(--color-surface-overlay);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: none;
}

.dropdown-menu.open {
  display: block;
}

.dropdown-menu a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  transition: background-color var(--transition-fast);
}

.dropdown-menu a:hover {
  background-color: var(--color-border);
  color: var(--color-text-white);
}

/* Caret */
.caret {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  vertical-align: middle;
}

/* Form controls */
.form-input {
  background-color: var(--color-surface-overlay);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-sm);
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px var(--color-accent-glow);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

.form-label {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.form-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.form-inline {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

/* Custom checkbox */
.checkbox-custom {
  display: flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
  gap: var(--space-sm);
}

.checkbox-custom input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-indicator {
  position: relative;
  width: 18px;
  height: 18px;
  background-color: var(--color-surface-overlay);
  border: 2px solid var(--color-border);
  border-radius: 3px;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
  flex-shrink: 0;
}

input[type="checkbox"]:checked + .checkbox-indicator {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

input[type="checkbox"]:checked + .checkbox-indicator::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border: solid var(--color-text-white);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

input[type="checkbox"]:focus + .checkbox-indicator {
  box-shadow: 0 0 0 2px var(--color-accent-glow);
}

.checkbox-label {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* Spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-surface-overlay);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner--inline {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.spinner-center {
  display: flex;
  justify-content: center;
  padding: var(--space-xl);
}

/* Save button spinner */
.btn .spinner--inline {
  display: none;
}

.btn.saving .spinner--inline {
  display: inline-block;
}

.btn.saved {
  background-color: var(--color-success, #1db954);
}