/* ==========================================================================
   BUTTON SYSTEM
   ========================================================================== */

.btn {
  --btn-arrow-shift: 0px;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 54px;
  padding: 0 30px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: background var(--transition-normal), color var(--transition-normal),
              border-color var(--transition-normal), transform var(--transition-fast),
              box-shadow var(--transition-normal);
}

.btn .arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
}

.btn:hover .arrow,
.btn:focus-visible .arrow { transform: translateX(6px); }

.btn-sm { height: 44px; padding: 0 22px; font-size: var(--fs-xs); }

/* Primary */
.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.btn-primary:active { transform: translateY(-1px); }

/* Accent (main conversion CTA) */
.btn-accent {
  background: var(--color-accent);
  color: var(--color-secondary);
}
.btn-accent:hover {
  background: var(--color-accent-dark);
  color: var(--color-white);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* Secondary / outline */
.btn-outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-secondary);
}
.btn-outline:hover {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-outline-inverse {
  background: transparent;
  border-color: rgba(245,243,238,0.35);
  color: var(--color-text-inverse);
}
.btn-outline-inverse:hover {
  background: var(--color-text-inverse);
  border-color: var(--color-text-inverse);
  color: var(--color-secondary);
  transform: translateY(-2px);
}

/* Text button */
.btn-text {
  height: auto;
  padding: 0;
  border: 0;
  border-radius: 0;
  text-transform: none;
  font-size: var(--fs-body);
  color: var(--color-primary);
  gap: 6px;
}
.btn-text::after {
  content: "";
  position: absolute;
  left: 0; bottom: -3px;
  width: 100%; height: 1.5px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}
.btn-text:hover::after { transform: scaleX(1); }

/* Icon button (e.g. floating WhatsApp / back to top) */
.btn-icon {
  width: 54px;
  height: 54px;
  padding: 0;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-lg);
}
.btn-icon:hover {
  transform: scale(1.06);
  box-shadow: 0 24px 50px rgba(15,27,45,0.22);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.btn-block { width: 100%; }

@media (max-width: 600px) {
  .btn { height: 50px; padding: 0 24px; font-size: var(--fs-xs); }
}