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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  transition: background 0.16s, border-color 0.16s, color 0.16s, transform 0.16s, filter 0.16s, opacity 0.15s;
}

button:disabled {
  opacity: 0.55;
  cursor: default;
  pointer-events: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 99px;
  padding: 8px 18px;
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn svg { width: 15px; height: 15px; }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: linear-gradient(180deg, #3fd68e, #1ea263);
  color: #04220f;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28), 0 6px 18px rgba(35, 199, 124, 0.22);
}

.btn-primary:hover:not(:disabled) {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) { transform: scale(0.97); }

/* Ghost — the default secondary action (legacy: btn-close-modal / btn-save) */
.btn-ghost,
.btn-close-modal,
.btn-save {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text-2);
}

.btn-ghost:hover:not(:disabled),
.btn-close-modal:hover:not(:disabled),
.btn-save:hover:not(:disabled) {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.26);
  background: rgba(255, 255, 255, 0.04);
}

/* Amber — destructive-ish confirmations (restart, reboot, retry) */
.btn-amber,
.btn-reboot,
.btn-restart-amber,
.btn-warning {
  background: rgba(233, 182, 74, 0.10);
  border-color: rgba(233, 182, 74, 0.32);
  color: #f2c45e;
}

.btn-amber:hover:not(:disabled),
.btn-reboot:hover:not(:disabled),
.btn-restart-amber:hover:not(:disabled),
.btn-warning:hover:not(:disabled) {
  background: rgba(233, 182, 74, 0.18);
  border-color: rgba(233, 182, 74, 0.5);
}

.btn-danger {
  background: rgba(246, 97, 81, 0.10);
  border-color: rgba(246, 97, 81, 0.35);
  color: #f8a39b;
}

.btn-danger:hover:not(:disabled) {
  background: rgba(246, 97, 81, 0.18);
  border-color: rgba(246, 97, 81, 0.5);
}

.btn-sm { padding: 6px 14px; font-size: 0.77rem; }

/* ── Header / topbar buttons ────────────────────────────────────── */

.btn-header-reboot {
  background: rgba(233, 182, 74, 0.10);
  border: 1px solid rgba(233, 182, 74, 0.32);
  color: #f2c45e;
  font-size: 0.77rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 99px;
}

.btn-header-reboot:hover:not(:disabled) {
  background: rgba(233, 182, 74, 0.18);
  border-color: rgba(233, 182, 74, 0.5);
}

.btn-logout {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-2);
  font-size: 0.77rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 99px;
}

.btn-logout:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.26);
  background: rgba(255, 255, 255, 0.04);
}

/* ── Update System button (sidebar) ─────────────────────────────── */

.btn-update {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-2);
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-update:hover:not(:disabled) {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.26);
  background: rgba(255, 255, 255, 0.04);
}

.btn-update.has-updates {
  background: rgba(66, 243, 154, 0.12);
  border-color: rgba(66, 243, 154, 0.4);
  color: var(--accent);
}

.update-badge {
  display: none;
  width: 10px;
  height: 10px;
  background-color: var(--amber);
  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); }
}

/* ── Icon buttons ───────────────────────────────────────────────── */

.btn-icon {
  background: none;
  color: var(--text-2);
  padding: 6px;
  border-radius: 50%;
  font-size: 1.1rem;
  line-height: 1;
}

.btn-icon:hover:not(:disabled) {
  background-color: rgba(255, 255, 255, 0.06);
  color: var(--text);
}