/* Button variants and sizes. */

.btn,
.wm-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  padding: 0.7rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--wm-radius-xs);
  background: var(--wm-color-surface-strong);
  color: var(--wm-color-text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    transform 0.15s ease,
    background 0.15s ease,
    border-color 0.15s ease,
    color 0.15s ease,
    opacity 0.15s ease;
}

.btn:hover,
.wm-btn:hover {
  transform: translateY(-1px);
}

.btn:disabled,
.wm-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.btn-primary,
.wm-btn-primary {
  background: var(--wm-color-accent-soft);
  border-color: var(--wm-color-accent-border);
  color: var(--wm-color-accent);
}

.btn-primary:hover,
.wm-btn-primary:hover {
  background: color-mix(in srgb, var(--wm-color-accent-soft) 68%, white);
}

.btn-secondary,
.wm-btn-secondary,
.btn-ghost,
.wm-btn-ghost {
  background: var(--wm-color-surface-strong);
  border-color: var(--wm-color-border);
  color: var(--wm-color-text-secondary);
}

.btn-primary-neutral,
.wm-btn-primary-neutral {
  background: var(--wm-color-surface-strong);
  border-color: var(--wm-color-border-strong);
  color: var(--wm-color-text);
}

.btn-primary-neutral:hover,
.wm-btn-primary-neutral:hover {
  background: var(--wm-color-surface-muted);
}

[data-theme="dark"] .btn-primary-neutral,
[data-theme="dark"] .wm-btn-primary-neutral {
  background: #fff;
  border-color: #fff;
  color: #0d0d0d;
}

[data-theme="dark"] .btn-primary-neutral:hover,
[data-theme="dark"] .wm-btn-primary-neutral:hover {
  background: #f2f2f2;
  border-color: #f2f2f2;
}

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

.btn-secondary-neutral:hover,
.wm-btn-secondary-neutral:hover {
  background: var(--wm-color-surface-strong);
  color: var(--wm-color-text);
}

.btn-secondary:hover,
.wm-btn-secondary:hover,
.btn-ghost:hover,
.wm-btn-ghost:hover {
  background: var(--wm-color-surface-muted);
}

.btn-danger,
.wm-btn-danger {
  background: var(--wm-color-danger-soft);
  border-color: var(--wm-color-danger-border);
  color: var(--wm-color-danger);
}

.btn-danger:hover,
.wm-btn-danger:hover {
  background: color-mix(in srgb, var(--wm-color-danger-soft) 80%, white);
}

.btn-success,
.wm-btn-success {
  background: var(--wm-color-success-soft);
  border-color: var(--wm-color-success-border);
  color: var(--wm-color-success);
}

.btn-warning,
.wm-btn-warning {
  background: var(--wm-color-warning-soft);
  border-color: var(--wm-color-warning-border);
  color: var(--wm-color-warning);
}

.btn-sm,
.wm-btn-sm {
  min-height: unset;
  padding: 0.3rem 0.7rem;
  font-size: 0.7rem;
}

.btn-link,
.wm-btn-link {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--wm-color-accent);
  font-size: inherit;
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 2px;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  min-height: unset;
  letter-spacing: 0;
  text-transform: none;
  border-radius: 0;
}

.btn-link:hover,
.wm-btn-link:hover {
  color: color-mix(in srgb, var(--wm-color-accent) 82%, black);
  background: none;
  transform: none;
}

/**
 * .btn-square / .wm-btn-square
 * Shape modifier alias for explicitness in markup. Base buttons are already
 * squared by default; this class keeps the rectangular treatment when teams
 * prefer shape to be opt-in at call sites. Combine with any
 * semantic variant (.btn-primary, .btn-secondary, etc.).
 *
 *   <button class="btn btn-primary btn-square">Start</button>
 *   <button class="btn btn-secondary btn-square btn-sm">Next</button>
 */
.btn-square,
.wm-btn-square {
  border-radius: var(--wm-radius-xs);
}

/**
 * .btn-pill / .wm-btn-pill
 * Compact muted pill for UI chrome controls (theme toggle, view toggle, print).
 * No action affordance — use for low-emphasis utility controls only.
 */
.btn-pill,
.wm-btn-pill {
  background: var(--wm-color-surface-strong);
  border: 1px solid var(--wm-color-border);
  border-radius: var(--wm-radius-pill);
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--wm-color-text-muted);
  line-height: 1;
  min-height: unset;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition:
    background 0.15s ease,
    border-color 0.15s ease,
    color 0.15s ease;
}

.btn-pill:hover,
.wm-btn-pill:hover {
  background: var(--wm-color-surface-muted);
  color: var(--wm-color-text);
}

/**
 * .btn-group / .wm-btn-group
 * Connects a set of buttons into a single horizontal unit by collapsing
 * internal borders and square-off the inner corners. Works with any
 * semantic variant and the .btn-sm size modifier.
 *
 *   <div class="btn-group">
 *     <button class="btn btn-secondary btn-sm">Left</button>
 *     <button class="btn btn-secondary btn-sm">Middle</button>
 *     <button class="btn btn-secondary btn-sm">Right</button>
 *   </div>
 */
.btn-group,
.wm-btn-group {
  display: inline-flex;
}

.btn-group > .btn,
.btn-group > .wm-btn,
.wm-btn-group > .btn,
.wm-btn-group > .wm-btn {
  border-radius: 0;
}

.btn-group > .btn:first-child,
.btn-group > .wm-btn:first-child,
.wm-btn-group > .btn:first-child,
.wm-btn-group > .wm-btn:first-child {
  border-radius: var(--wm-radius-xs) 0 0 var(--wm-radius-xs);
}

.btn-group > .btn:last-child,
.btn-group > .wm-btn:last-child,
.wm-btn-group > .btn:last-child,
.wm-btn-group > .wm-btn:last-child {
  border-radius: 0 var(--wm-radius-xs) var(--wm-radius-xs) 0;
}

.btn-group > .btn:not(:first-child),
.btn-group > .wm-btn:not(:first-child),
.wm-btn-group > .btn:not(:first-child),
.wm-btn-group > .wm-btn:not(:first-child) {
  margin-left: -1px;
}

.btn-group > .btn:hover,
.btn-group > .wm-btn:hover,
.wm-btn-group > .btn:hover,
.wm-btn-group > .wm-btn:hover {
  position: relative;
  z-index: 1;
}

/**
 * .btn-expand / .wm-btn-expand
 * Borderless disclosure / section-expansion trigger. Use for inline "Show
 * more", "Show examples", expand-collapse controls where a full button
 * treatment would be too heavy. Renders as a muted text row with a leading
 * chevron that rotates when the [aria-expanded="true"] state is set.
 *
 *   <button class="btn btn-expand" aria-expanded="false">Show examples</button>
 *   <button class="btn btn-expand" aria-expanded="true">Hide examples</button>
 */
.btn-expand,
.wm-btn-expand {
  background: none;
  border: none;
  padding: 0.2rem 0;
  min-height: unset;
  gap: 0.3rem;
  color: var(--wm-color-text-muted);
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
  border-radius: 0;
  transition: color 0.15s ease;
}

.btn-expand::before,
.wm-btn-expand::before {
  content: '▶';
  display: inline-block;
  font-size: 0.6em;
  transition: transform 0.2s ease;
}

.btn-expand[aria-expanded="true"]::before,
.wm-btn-expand[aria-expanded="true"]::before {
  transform: rotate(90deg);
}

.btn-expand:hover,
.wm-btn-expand:hover {
  color: var(--wm-color-text);
  background: none;
  transform: none;
}

.btn-expand:disabled,
.wm-btn-expand:disabled {
  color: var(--wm-color-text-muted);
  opacity: 0.5;
}