/* Buttons, once (plan 10): .btn-primary / .btn-ghost / .btn-danger, sizes
   .btn-sm / .btn-xs / .btn-lg, and the round .icon-btn. Tokens from tokens.css. */

.btn-primary,
.btn-ghost,
.btn-danger {
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 12px 20px;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  white-space: nowrap;
  transition:
    transform 0.15s ease,
    background 0.2s ease,
    border-color 0.2s ease,
    filter 0.2s ease;
}
.btn-primary {
  background: var(--primary-gradient);
  color: var(--on-primary);
  box-shadow: 0 6px 20px var(--primary-shadow);
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  filter: brightness(1.08);
}
.btn-ghost {
  background: transparent;
  border-color: var(--border-color);
  color: var(--text-color);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--surface-hover);
}
.btn-danger {
  background: transparent;
  border-color: var(--border-color);
  color: var(--danger);
}
.btn-danger:hover:not(:disabled) {
  background: var(--danger-soft);
  border-color: var(--danger);
}
.btn-primary:disabled,
.btn-ghost:disabled,
.btn-danger:disabled {
  opacity: 0.5;
  box-shadow: none;
  cursor: not-allowed;
}
.btn-primary[hidden],
.btn-ghost[hidden],
.btn-danger[hidden],
.icon-btn[hidden] {
  display: none;
}

.btn-sm {
  padding: 7px 13px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}
.btn-xs {
  padding: 4px 10px;
  font-size: 0.78rem;
  border-radius: 8px;
}
.btn-lg {
  padding: 16px 24px;
  font-size: 1.05rem;
  width: 100%;
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-color);
  font-size: 1.15rem;
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease;
}
.icon-btn:hover:not(:disabled) {
  background: var(--surface-hover);
}
.icon-btn:disabled {
  opacity: 0.35;
  cursor: default;
}