/* Button — durchgehend Pill, beim Hover wandert Text und Icon nach oben.
   Gemeinsames Verhalten auf .ds-btn, die Farben kommen vom Variant-Modifier. */

.ds-btn {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius-button);
  padding: var(--btn-padding-y) var(--btn-padding-x);
  font-family: var(--font-body);
  font-weight: var(--font-weight-medium);
  font-size: var(--text-button);
  line-height: 1;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.ds-btn:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

/* ============ Variants ============ */
/* Primary — orange accent CTA. */
.ds-btn--primary {
  background: var(--color-accent);
  color: var(--color-on-accent);
}

/* Secondary dark — pure black fill, white text. Use on LIGHT backgrounds. */
.ds-btn--secondary-dark {
  background: var(--color-black);
  color: var(--color-white);
}

/* Secondary light — white fill, ink text. Use on DARK backgrounds. */
.ds-btn--secondary-light {
  background: var(--color-white);
  color: var(--color-ink);
}

/* ============ Rolodex swap ============
   Viewport: exactly one row tall, clips the swap. Row 1 sits in flow;
   row 2 is parked directly below (translateY 100%), hidden by overflow. */
.ds-btn__rolodex {
  position: relative;
  display: inline-flex;
  height: 20px;
  overflow: hidden;
}

.ds-btn__row {
  position: relative;
  top: 0;
  left: 0;
  width: 100%;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--btn-gap);
  white-space: nowrap;
  transform: translate3d(0, 0%, 0);
  transition: transform var(--transition-btn) ease;
}

.ds-btn__row--next {
  position: absolute;
  transform: translate3d(0, 100%, 0);
}

/* Hover: row 1 slides up and out, row 2 slides up into row 1's old spot. */
.ds-btn:hover .ds-btn__row {
  transform: translate3d(0, -100%, 0);
}

.ds-btn:hover .ds-btn__row--next {
  transform: translate3d(0, 0%, 0);
}

.ds-btn__label {
  display: inline-block;
}

.ds-btn__icon {
  display: inline-flex;
  flex-shrink: 0;
}

.ds-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}