/* ============================================================
   FLTF BUTTONS — All button variants
   Depends on: fltf-base.css
   ============================================================ */

/* ── Base Button Reset ── */
.fltf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 11px var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--fw-semi);
  line-height: 1.4;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: var(--transition-normal);
  -webkit-appearance: none;
  appearance: none;
  user-select: none;
  position: relative;
  overflow: hidden;
}

.fltf-btn:focus-visible {
  outline: 3px solid var(--fltf-accent);
  outline-offset: 2px;
}

.fltf-btn:disabled,
.fltf-btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── Primary (brand gradient) ── */
.fltf-btn--primary,
.btn-login,
.btn-update {
  background: var(--fltf-gradient);
  color: var(--fltf-white) !important;
  border-color: transparent;
  box-shadow: 0 2px 10px rgba(0, 69, 124, 0.22);
}

.fltf-btn--primary:hover,
.btn-login:hover,
.btn-update:hover {
  background: linear-gradient(135deg, #1A6FA8 0%, #002E56 100%);
  box-shadow: 0 6px 20px rgba(0, 69, 124, 0.32);
  transform: translateY(-2px);
  color: var(--fltf-white) !important;
}

.fltf-btn--primary:active,
.btn-login:active,
.btn-update:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0, 69, 124, 0.2);
}

/* ── Secondary (outlined) ── */
.fltf-btn--secondary {
  background: transparent;
  color: var(--fltf-primary);
  border-color: var(--fltf-primary);
}

.fltf-btn--secondary:hover {
  background: var(--fltf-primary);
  color: var(--fltf-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* ── Ghost (subtle) ── */
.fltf-btn--ghost {
  background: var(--fltf-sky);
  color: var(--fltf-primary);
  border-color: transparent;
}

.fltf-btn--ghost:hover {
  background: var(--fltf-accent-light);
  color: var(--fltf-primary-dark);
}

/* ── Danger ── */
.fltf-btn--danger {
  background: var(--fltf-danger);
  color: var(--fltf-white);
  border-color: transparent;
  box-shadow: 0 2px 8px rgba(185, 28, 28, 0.2);
}

.fltf-btn--danger:hover {
  background: #991b1b;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(185, 28, 28, 0.28);
  color: var(--fltf-white);
}

/* ── Success ── */
.fltf-btn--success {
  background: var(--fltf-success);
  color: var(--fltf-white);
  border-color: transparent;
}

.fltf-btn--success:hover {
  background: #065f3a;
  transform: translateY(-1px);
  color: var(--fltf-white);
}

/* ── White (on dark bg) ── */
.fltf-btn--white {
  background: var(--fltf-white);
  color: var(--fltf-primary);
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}

.fltf-btn--white:hover {
  background: var(--fltf-sky);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* ── Outline neutral ── */
.fltf-btn--outline-dark,
.btn-outline-success {
  background: transparent;
  color: var(--fltf-grey-800) !important;
  border: 2px solid var(--fltf-grey-200) !important;
}

.fltf-btn--outline-dark:hover,
.btn-outline-success:hover {
  background: var(--fltf-grey-800) !important;
  color: var(--fltf-white) !important;
  border-color: var(--fltf-grey-800) !important;
  transform: translateY(-1px);
}

/* ── Sizes ── */
.fltf-btn--sm {
  padding: 7px var(--space-4);
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
}

.fltf-btn--lg {
  padding: 14px var(--space-8);
  font-size: var(--text-lg);
  border-radius: var(--radius-md);
}

.fltf-btn--full {
  width: 100%;
}

/* ── Loading state ── */
.fltf-btn--loading {
  pointer-events: none;
}

.fltf-btn--loading::after {
  content: '';
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: white;
  border-radius: 50%;
  animation: fltf-spin 0.6s linear infinite;
  margin-left: var(--space-2);
}

@keyframes fltf-spin {
  to { transform: rotate(360deg); }
}

/* ── Icon-only button ── */
.fltf-btn--icon {
  padding: 10px;
  border-radius: var(--radius-sm);
  width: 40px;
  height: 40px;
}

/* ── Button group ── */
.fltf-btn-group {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.fltf-btn-group--stack {
  flex-direction: column;
}

/* Keep Bootstrap d-grid compatibility */
.d-grid .fltf-btn,
.d-grid .btn-login,
.d-grid .btn-update {
  width: 100%;
}