/* Element library styles — button, input, drawer, slideshow, banner. */

/* === Button === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-base);
  font-family: inherit;
  font-weight: var(--weight-heading);
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all 150ms ease-out;
  will-change: transform;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.btn-label {
  transition: visibility 0ms;
}

.btn-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}

/* --- Sizes --- */
.btn-sm {
  padding: var(--space-xs) var(--space-sm);
  font-size: calc(var(--font-base) * var(--scale-sm));
  gap: 0.35em;
}

/* --- Variants ---
 * Flavors are declarative: each variant reads a semantic token from
 * tokens.yaml. To add a new flavor, expose a token, not a new rule here.
 *
 * primary  → near-black on light, white on dark (solid CTA)
 * accent   → brand color (magenta/pink), used for emphasis
 * secondary → outlined, neutral
 * ghost    → text-only
 */
.btn-primary {
  background: var(--color-btn-primary-resolved);
  color: var(--color-btn-primary-text-resolved);
  border-color: var(--color-btn-primary-resolved);
}

.btn-primary:hover {
  background: var(--color-btn-primary-hover-resolved);
  border-color: var(--color-btn-primary-hover-resolved);
}

.btn-accent {
  background: var(--color-accent-resolved);
  color: #fff;
  border-color: var(--color-accent-resolved);
}

.btn-accent:hover {
  background: var(--color-accent-hover-resolved);
  border-color: var(--color-accent-hover-resolved);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-resolved);
  border-color: var(--color-border-resolved);
}

.btn-secondary:hover {
  border-color: var(--color-text-resolved);
  background: color-mix(in srgb, var(--color-text-resolved) 4%, transparent);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary-resolved);
  border-color: transparent;
  opacity: 0.8;
}

.btn-ghost:hover {
  opacity: 1;
  color: var(--color-text-resolved);
}

/* --- Theme toggle button — icon swaps via [data-theme] --- */
.btn-theme .btn-state-light,
.btn-theme .btn-state-dark {
  display: inline-flex;
  line-height: 0;
}

.btn-theme .btn-state-dark,
[data-theme="dark"] .btn-theme .btn-state-light {
  display: none;
}

[data-theme="dark"] .btn-theme .btn-state-dark {
  display: inline-flex;
}

/* --- States --- */
.btn[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.btn[data-state="loading"] .btn-label {
  visibility: hidden;
}

.btn[data-state="loading"] .btn-state::after {
  content: '';
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-bottom-color: transparent;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
}

.btn[data-state="loading"] {
  pointer-events: none;
}

.btn[data-state="success"] .btn-label {
  visibility: hidden;
}

.btn[data-state="success"] .btn-state::after {
  content: '\2713';
  font-size: 1.2em;
}

@keyframes btn-spin {
  to { transform: rotate(360deg); }
}

/* --- Focus --- */
.btn:focus-visible {
  box-shadow:
    0 0 0 2px var(--color-bg-resolved),
    0 0 0 4px var(--color-accent-resolved);
  outline: none;
}

/* --- Press feedback (prefers-reduced-motion aware) --- */
@media (prefers-reduced-motion: no-preference) {
  .btn[data-interaction="press"]:active {
    transform: scale(0.97);
    transition-duration: 100ms;
  }
}

/* === Input === */
.el-input-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.el-input-group label {
  font-size: 0.9rem;
  font-weight: 600;
}

.el-input {
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--color-border-resolved);
  border-radius: 4px;
  background: var(--color-bg-resolved);
  color: var(--color-text-resolved);
}

.el-input:focus {
  outline: 2px solid var(--color-accent-resolved);
  outline-offset: 1px;
}

.el-input-hint {
  font-size: 0.8rem;
  color: var(--color-text-secondary-resolved);
}

textarea.el-input {
  min-height: 6rem;
  resize: vertical;
}

/* === Drawer === */
.el-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1100;
}

.el-drawer-overlay[hidden] { display: none; }

.el-drawer {
  position: fixed;
  top: 0;
  bottom: 0;
  width: min(90vw, 400px);
  background: var(--color-bg-resolved);
  padding: 1.5rem;
  overflow-y: auto;
  box-shadow: -4px 0 16px rgba(0, 0, 0, 0.1);
  transition: transform 200ms ease-out;
}

.el-drawer--right { right: 0; }
.el-drawer--left { left: 0; }

.el-drawer-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-secondary-resolved);
  padding: 0.25rem;
  line-height: 1;
}

/* === Banner === */
.el-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  border-radius: 4px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.el-banner--info {
  background: var(--color-banner-info-bg-resolved);
  color: var(--color-banner-info-text-resolved);
  border: 1px solid var(--color-banner-info-border-resolved);
}

.el-banner--warning {
  background: var(--color-banner-warning-bg-resolved);
  color: var(--color-banner-warning-text-resolved);
  border: 1px solid var(--color-banner-warning-border-resolved);
}

.el-banner--error {
  background: var(--color-banner-error-bg-resolved);
  color: var(--color-banner-error-text-resolved);
  border: 1px solid var(--color-banner-error-border-resolved);
}

.el-banner--success {
  background: var(--color-banner-success-bg-resolved);
  color: var(--color-banner-success-text-resolved);
  border: 1px solid var(--color-banner-success-border-resolved);
}

.el-banner-close {
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: inherit;
  opacity: 0.7;
  padding: 0 0.25rem;
  line-height: 1;
}

/* === Slideshow === */
.el-slideshow {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  margin: 1.5rem 0;
}

.el-slideshow-viewport {
  position: relative;
}

.el-slide {
  width: 100%;
}

.el-slide[hidden] { display: none; }

.el-slideshow-controls {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem;
}

.el-slideshow-prev,
.el-slideshow-next {
  background: var(--color-surface-resolved);
  border: 1px solid var(--color-border-resolved);
  border-radius: 4px;
  padding: 0.35rem 0.75rem;
  cursor: pointer;
  font-size: 1rem;
}

/* === Reduced Motion === */
@media (prefers-reduced-motion: reduce) {
  .el-drawer { transition: none; }
  .btn { transition: none; }
}