/* Sao chép từ frontend/ v3 vào frontend-v4/ — không sửa cây v3. */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.brand img,
.brand svg {
  width: 40px;
  height: 40px;
}

.brand__name {
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: 1.05rem;
}

.brand__tag {
  color: var(--color-muted);
  font-size: 0.75rem;
  font-weight: 500;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  padding: var(--space-12) 0;
  gap: var(--space-12);
}

.topbar-spacer {
  width: 40px;
  flex-shrink: 0;
}

.card-heading {
  font-size: 1rem;
  margin-bottom: var(--space-8);
}

.icon-btn {
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: var(--radius-12);
  background: var(--color-surface);
  color: var(--color-text);
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.icon-btn:hover {
  background: var(--color-surface-2);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-20);
  padding: var(--space-20);
  box-shadow: var(--shadow-md);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.card--hover:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card + .card {
  margin-top: var(--space-16);
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  margin-bottom: var(--space-16);
}

.field label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-muted);
}

.field input,
.field select {
  width: 100%;
  height: 48px;
  padding: 0 var(--space-16);
  border-radius: var(--radius-12);
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  outline: none;
}

.field input:focus,
.field select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  width: 100%;
  min-height: 48px;
  padding: 12px var(--space-20);
  border: 0;
  border-radius: var(--radius-12);
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.12s ease, background 0.12s ease;
}

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

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn--inline {
  width: auto;
  min-height: 40px;
  padding: 0 var(--space-16);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

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

.btn--accent {
  background: var(--color-accent);
  color: #042f1e;
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: none;
}

.btn--danger {
  background: var(--color-danger-soft);
  color: #fecaca;
}

.alert {
  border-radius: var(--radius-12);
  padding: var(--space-12) var(--space-16);
  font-size: 0.9rem;
  margin-bottom: var(--space-16);
}

.alert--error {
  background: var(--color-danger-soft);
  color: #fecaca;
}

.alert--error p {
  margin: 0 0 8px;
}

.btn--retry {
  width: auto;
  min-height: 40px;
  padding: 0 14px;
  margin-top: 4px;
}

.empty-state {
  text-align: left;
  padding: var(--space-20);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-20);
  background: var(--color-bg-elevated);
}

.empty-state h2 {
  font-size: 1.05rem;
  margin-bottom: var(--space-8);
}

.empty-state .btn {
  margin-top: var(--space-16);
}

#global-loading {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-12);
  background: rgba(11, 16, 32, 0.72);
  color: var(--color-text);
}

#global-loading[hidden] {
  display: none !important;
}

.alert--empty {
  background: var(--color-primary-soft);
  color: var(--color-muted);
}

.muted {
  color: var(--color-muted);
}

.tiny {
  font-size: 0.8rem;
  color: var(--color-faint);
}

/* Probe TTS phiên 35 — text + blob bytes + timing (xác minh, không ẩn khi PASS). */
.tts-probe {
  white-space: pre-wrap;
  font-size: 0.72rem;
  line-height: 1.45;
  color: var(--color-faint);
  margin: 0 0 var(--space-12);
  padding: 8px 12px;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-12);
  word-break: break-word;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-4) var(--space-12);
  border-radius: var(--radius-50);
  background: var(--color-primary-soft);
  color: #c7d2fe;
  font-size: 0.78rem;
  font-weight: 600;
}

.pill--accent {
  background: var(--color-accent-soft);
  color: #6ee7b7;
}

.list-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-12);
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--color-border);
}

.list-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.skeleton {
  background: linear-gradient(90deg, var(--color-surface-2), #2a3358, var(--color-surface-2));
  background-size: 200% 100%;
  animation: shimmer 1.2s ease-in-out infinite;
  border-radius: var(--radius-8);
  min-height: 16px;
  border: 1px solid var(--color-border);
}

.toast-stack {
  position: fixed;
  z-index: 80;
  right: 16px;
  bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: min(360px, calc(100vw - 32px));
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: 12px 14px;
  border-radius: var(--radius-12);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  font-size: 0.9rem;
}

.toast--error {
  border-color: rgba(239, 68, 68, 0.45);
  background: #1c1420;
}

@keyframes shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}