/* ============================================
   COMPONENTS – Buttons, Cards, Forms, Toast
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.625rem 1.25rem;
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1.4;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #fff;
}

.btn-secondary {
  background-color: var(--color-bg-surface);
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn-secondary:hover {
  background-color: var(--color-bg-hover);
  color: var(--color-text);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  background-color: var(--color-bg-surface);
  color: var(--color-text);
}

.btn-danger {
  background-color: var(--color-danger-muted);
  color: var(--color-danger);
  border-color: transparent;
}

.btn-danger:hover {
  background-color: var(--color-danger);
  color: #fff;
}

.btn-sm {
  padding: 0.4rem 0.875rem;
  font-size: var(--font-size-xs);
}

.btn-icon {
  padding: 0.5rem;
  min-width: 2.25rem;
  min-height: 2.25rem;
}

.card {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.6rem;
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: 999px;
  line-height: 1.4;
}

.badge-online {
  background-color: var(--color-success-muted);
  color: var(--color-success);
}

.badge-offline {
  background-color: var(--color-danger-muted);
  color: var(--color-danger);
}

.badge-dot::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: currentColor;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.form-group label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-family: inherit;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-muted);
}

.form-group input::placeholder {
  color: var(--color-text-subtle);
}

.form-message {
  font-size: var(--font-size-sm);
  min-height: 1.25rem;
  color: var(--color-text-muted);
}

.form-message.error {
  color: var(--color-danger);
}

.form-message.success {
  color: var(--color-success);
}

.toast-container {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  animation: toast-in 0.25s ease;
  max-width: 360px;
}

.toast-success { border-left: 3px solid var(--color-success); }
.toast-error { border-left: 3px solid var(--color-danger); }
.toast-info { border-left: 3px solid var(--color-accent); }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background-color: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  animation: fade-in 0.15s ease;
}

.modal {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow-lg);
}

.modal h3 {
  margin-bottom: var(--spacing-sm);
}

.modal p {
  margin-bottom: var(--spacing-lg);
}

.modal-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--color-border-strong);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

.btn.is-loading {
  pointer-events: none;
  opacity: 0.7;
}