/* ==========================================================================
   SUNSHINE AESTHETIC CLINIC — BUTTONS
   Quiet confidence. No shouting, no heavy shadows, no bounce.
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: var(--text-label-weight);
  font-size: var(--text-label-size);
  text-transform: var(--text-label-transform);
  letter-spacing: var(--text-cta-tracking);
  white-space: nowrap;
  border-radius: var(--radius-pill);
  padding: var(--space-3) var(--space-5);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--duration-standard) var(--ease-signature),
              color var(--duration-standard) var(--ease-signature),
              border-color var(--duration-standard) var(--ease-signature),
              transform var(--duration-standard) var(--ease-signature),
              box-shadow var(--duration-standard) var(--ease-signature);
}

/* Primary — Champagne Tan fill. Book, buy, confirm. */
.btn--primary {
  background-color: var(--color-champagne-tan);
  color: var(--color-cocoa-ink);
}
.btn--primary:hover {
  background-color: var(--color-champagne-tan-deep);
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}
.btn--primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-rest);
}

/* Secondary — Cocoa Ink outline. Learn more, secondary actions. */
.btn--secondary {
  background-color: transparent;
  color: var(--color-cocoa-ink);
  border-color: var(--color-cocoa-ink);
}
.btn--secondary:hover {
  background-color: var(--color-whisper-mint-10);
  border-color: var(--color-cocoa-ink);
  transform: translateY(-1px);
}

/* Ghost — text-only link with underline reveal. Tertiary actions. */
.btn--ghost {
  background-color: transparent;
  color: var(--color-cocoa-ink);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  position: relative;
}
.btn--ghost::after {
  content: '';
  position: absolute;
  left: var(--space-2);
  right: var(--space-2);
  bottom: 2px;
  height: 1px;
  background-color: var(--color-champagne-tan-deep);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-standard) var(--ease-signature);
}
.btn--ghost:hover::after {
  transform: scaleX(1);
}

/* On signature (mint) backgrounds — pass through cream, never tan-on-mint */
.on-signature .btn--secondary {
  border-color: var(--color-cocoa-ink);
  background-color: var(--color-butter-cream);
}

/* Disabled */
.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* Sizes */
.btn--sm { padding: var(--space-2) var(--space-4); }
.btn--lg { padding: var(--space-4) var(--space-6); }

/* Focus state — accessible, still quiet */
.btn:focus-visible {
  outline: 2px solid var(--color-champagne-tan-deep);
  outline-offset: 2px;
}