.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: inherit;
  font-weight: 600;
  border: none;
  border-radius: var(--r-md);
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease, background 0.2s ease, box-shadow 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  line-height: 1;
}

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

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--primary-tint);
}

/* Sizes */
.btn-sm { padding: 0.5rem 1rem; font-size: 0.75rem; }
.btn-md { padding: 0.7rem 1.25rem; font-size: 0.875rem; }
.btn-lg { padding: 0.95rem 1.75rem; font-size: 1rem; }
.btn-full { width: 100%; }

/* Primary */
.btn-primary,
.btn-like {
  background: var(--primary);
  color: var(--on-primary);
  box-shadow: var(--glow);
}
.btn-primary:hover:not(:disabled),
.btn-like:hover:not(:disabled) {
  background: var(--primary-hover);
  transform: translateY(-1px);
  filter: brightness(1.06);
}
.btn-primary:active:not(:disabled),
.btn-like:active:not(:disabled) {
  background: var(--primary-press);
  transform: translateY(0);
}

/* Gradient variant */
.btn-grad {
  background: var(--grad);
  color: var(--on-primary);
  box-shadow: var(--glow);
}
.btn-grad:hover:not(:disabled) { transform: translateY(-1px); filter: brightness(1.06); }

/* Match (kept, but themed) */
.btn-match {
  background: var(--grad);
  color: var(--on-primary);
  box-shadow: var(--glow);
}
.btn-match:hover:not(:disabled) { transform: translateY(-1px); filter: brightness(1.06); }

/* Secondary */
.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--surface-3);
  transform: translateY(-1px);
}

/* Outline */
.btn-outline {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text);
}
.btn-outline:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary-ink);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--primary-ink);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--primary-tint);
}

/* Danger */
.btn-danger {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-2);
}
.btn-danger:hover:not(:disabled) {
  background: var(--danger-tint);
  border-color: var(--danger);
  color: var(--danger);
}

.btn-icon { display: flex; align-items: center; justify-content: center; }