/**
 * Button: theme-aware button variants.
 * Uses --bb-* tokens so it automatically reflects the active theme.
 *
 * Usage:
 *   <button class="bb-btn bb-btn-filled">Save</button>
 *   <button class="bb-btn bb-btn-tonal">Secondary</button>
 *   <button class="bb-btn bb-btn-outline">Cancel</button>
 *   <button class="bb-btn bb-btn-text">Forgot password?</button>
 *   <a class="bb-btn bb-btn-neon" href="/try">Try it</a>
 */

.bb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--bb-spacing-2);
  width: 100%;
  padding: 10px var(--bb-spacing-4);
  font-family: var(--bb-font-family-body);
  font-size: var(--bb-font-size-sm);
  font-weight: var(--bb-font-weight-medium);
  border: none;
  border-radius: var(--bb-radius-md);
  cursor: pointer;
  text-align: center;
  transition: opacity 0.15s, filter 0.15s;
  text-decoration: none;
  line-height: 1;
}

.bb-btn:hover:not(:disabled) {
  filter: brightness(1.08);
}

.bb-btn:active:not(:disabled) {
  filter: brightness(0.94);
}

.bb-btn:disabled {
  cursor: not-allowed;
  opacity: 1;
  font-family: var(--bb-font-family-body);
  font-weight: var(--bb-font-weight-medium);
}

.bb-btn-filled:disabled {
  background: var(--bb-v2-color-border-subtle);
  color: var(--bb-v2-color-content-secondary);
}

.bb-btn-tonal:disabled {
  background: var(--bb-v2-color-border-subtle);
  color: var(--bb-v2-color-content-secondary);
}

.bb-btn-outline:disabled {
  background: transparent;
  color: var(--bb-v2-color-content-secondary);
  border-color: var(--bb-v2-color-border-subtle);
}

.bb-btn-filled {
  background: var(--bb-v2-identity-primary);
  color: var(--bb-v2-identity-primary-foreground);
}

.bb-btn-tonal {
  background: var(--bb-v2-color-interaction-selection);
  color: var(--bb-v2-color-interaction-on-selection);
}

/* Neutral secondary CTA. Availability remains independent of visual emphasis. */
.bb-btn-neutral,
.bb-btn-neutral:disabled {
  background: var(--bb-v2-color-border-subtle);
  color: var(--bb-v2-color-content-secondary);
}

.bb-btn.bb-btn--bold {
  font-weight: var(--bb-font-weight-bold);
}

.bb-btn-filled.bb-btn--retain-emphasis:disabled {
  background: var(--bb-v2-identity-primary);
  color: var(--bb-v2-identity-primary-foreground);
}

.bb-btn-outline {
  background: transparent;
  color: var(--bb-v2-identity-primary);
  border: 1px solid var(--bb-v2-color-border-default);
}

.bb-btn-text {
  background: transparent;
  color: var(--bb-v2-identity-primary);
  width: auto;
  padding-left: var(--bb-spacing-1);
  padding-right: var(--bb-spacing-1);
}

.bb-btn-neon {
  position: relative;
  z-index: 1;
  display: inline-flex;
  width: auto;
  min-height: 0;
  padding: 0.6rem 0.8rem;
  border: 0;
  border-radius: 30px;
  color: var(--bb-marketing-highlight, var(--bb-v2-color-content-primary));
  background: transparent;
  font-family: var(--bb-v2-type-display-family);
  font-synthesis: style;
  font-size: clamp(1.5rem, 1.8vw, 2rem);
  font-weight: var(--bb-v2-type-display-font-weight, var(--bb-font-weight-semibold));
  line-height: var(--bb-v2-type-display-line-height, normal);
  letter-spacing: var(--bb-v2-type-display-letter-spacing, 0);
  text-shadow: 0 0 5px var(--bb-v2-identity-primary),
    0 0 10px var(--bb-v2-identity-primary),
    0 0 20px var(--bb-v2-identity-primary),
    0 0 40px var(--bb-v2-identity-primary),
    0 0 60px var(--bb-marketing-portfolio-glow-far, var(--bb-v2-identity-primary)),
    0 0 80px var(--bb-marketing-portfolio-glow-far, var(--bb-v2-identity-primary));
  transition: box-shadow 300ms ease, filter 150ms, transform 300ms ease;
}

.bb-btn-neon.bb-btn--compact {
  font-size: clamp(1.3rem, 1.8vw, 2rem);
}

.bb-btn-neon.bb-btn--medium {
  margin-top: 0.5rem;
  font-size: 1.6rem;
}

.bb-btn.bb-btn-neon,
.bb-btn.bb-btn-neon::before {
  box-sizing: content-box;
}

.bb-btn-neon::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  padding: 2px;
  border-radius: 30px;
  background: linear-gradient(
    to bottom,
    var(--bb-v2-identity-accent, var(--bb-v2-identity-primary)),
    var(--bb-marketing-highlight, var(--bb-v2-color-content-primary))
  );
  content: "";
  pointer-events: none;
  mask: linear-gradient(var(--bb-v2-color-content-primary) 0 0) content-box,
    linear-gradient(var(--bb-v2-color-content-primary) 0 0);
  mask-composite: exclude;
}

.bb-btn-neon:hover:not(:disabled),
.bb-btn-neon:focus-visible:where(:root:not([data-bb-focus-origin="pointer"]) *) {
  box-shadow: 0 0 14px color-mix(in srgb, var(--bb-v2-identity-accent, var(--bb-v2-identity-primary)) 50%, transparent);
  transform: scale(1.2);
}

.bb-btn-neon:focus-visible:where(:root:not([data-bb-focus-origin="pointer"]) *) {
  outline: 2px solid var(--bb-v2-identity-secondary);
  outline-offset: 3px;
}