/* ── Buttons ────────────────────────────────────────────────────── */

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  transition: opacity 0.15s, box-shadow 0.15s, background-color 0.15s;
}

button:disabled {
  opacity: 0.45;
  cursor: default;
}

.btn {
  padding: 7px 16px;
  border-radius: var(--radius-btn);
  font-size: 0.88rem;
  font-weight: 600;
}

.btn-primary {
  background-color: var(--accent-color);
  color: #0A1A10;
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.88;
}

/* Update System button: uses accent green by default */
.btn-update {
  background-color: #4A9474;
  color: #E0F2EA;
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-update:hover:not(:disabled) {
  opacity: 0.88;
}

/* Update System button: brighter green when updates are available */
.btn-update.has-updates {
  background-color: #5EAD8A;
  color: #0A1A10;
}

.btn-update.has-updates:hover:not(:disabled) {
  background-color: #78C8A2;
}

.update-badge {
  display: none;
  width: 10px;
  height: 10px;
  background-color: var(--yellow);
  border-radius: 50%;
  animation: pulse-badge 1.4s ease-in-out infinite;
}

.update-badge.visible {
  display: inline-block;
}

@keyframes pulse-badge {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(1.35); }
}

.btn-icon {
  background: none;
  color: var(--text-secondary);
  padding: 6px;
  border-radius: 50%;
  font-size: 1.1rem;
  line-height: 1;
}

.btn-icon:hover:not(:disabled) {
  background-color: var(--border-color);
  color: var(--text-primary);
}