src/components/TopBar.css

.topbar {
  height: auto;
  min-height: var(--topbar-h);
  display: flex;
  align-items: stretch;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 3;
  min-width: 0;
}

.topbar__menu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  border: 0;
  border-right: 1px solid var(--border);
  border-radius: 0;
  padding: 0 var(--sp-4);
  min-width: 92px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.topbar__menu-btn:hover {
  color: var(--text);
  border-color: var(--border);
}

.topbar__topic {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  padding: 0 var(--sp-6);
  border-right: 1px solid var(--border);
  min-width: 280px;
  max-width: 460px;
  min-width: 0;
  flex: 1 1 340px;
}

.topbar__topic-button {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  background: transparent;
  border: 0;
  padding: 0;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text);
  cursor: pointer;
  text-align: left;
  min-width: 0;
  flex-wrap: nowrap;
}

.topbar__topic-button:hover {
  color: var(--accent);
  border-color: transparent;
}

.topbar__topic-block {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
  flex: 1;
}

.topbar__topic-text {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  line-height: 1.1;
  letter-spacing: -0.005em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.topbar__topic-meta {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: 0.06em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.topbar__topic-icon {
  color: var(--text-faint);
  transition: color var(--transition);
}

.topbar__topic-button:hover .topbar__topic-icon {
  color: var(--accent);
}

.topbar__metrics {
  display: flex;
  align-items: stretch;
  margin-left: auto;
  min-width: 0;
  overflow: hidden;
}

.metric {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 var(--sp-6);
  border-left: 1px solid var(--border);
  min-width: 100px;
  flex: 0 0 auto;
}

.metric--tight {
  min-width: 180px;
}

.metric__label {
  margin-bottom: 4px;
}

.metric__value {
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  color: var(--text);
  letter-spacing: 0.04em;
  display: flex;
  align-items: baseline;
  gap: var(--sp-2);
}

.metric__value--danger  { color: var(--danger); }
.metric__value--warn    { color: var(--warning); }
.metric__value--neutral { color: var(--neutral); }

.metric__suffix {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

@media (max-width: 1200px) {
  .topbar {
    flex-direction: column;
  }

  .topbar__topic {
    flex-basis: auto;
    padding-inline: var(--sp-4);
    max-width: none;
    border-right: 0;
    border-bottom: 1px solid var(--border);
    padding-block: var(--sp-3);
  }

  .topbar__topic-text {
    max-width: none;
  }

  .topbar__metrics {
    margin-left: 0;
    display: grid;
    grid-template-columns: repeat(6, minmax(120px, 1fr));
  }

  .metric {
    min-width: 0;
    border-left: 0;
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: var(--sp-3) var(--sp-4);
  }

  .metric:nth-child(6n) {
    border-right: 0;
  }
}

@media (max-width: 900px) {
  .topbar__metrics {
    display: none;
  }

  .topbar__topic {
    border-bottom: 0;
  }

  .topbar__menu-btn {
    border-right: 0;
    border-bottom: 1px solid var(--border);
    min-width: 0;
    width: 100%;
    justify-content: flex-start;
    padding: var(--sp-3) var(--sp-4);
  }
}

@media (max-width: 640px) {
  .topbar__topic-meta {
    display: none;
  }

  .topbar__topic-icon {
    display: none;
  }
}

@media (max-width: 520px) {
  .topbar__topic-text {
    font-size: var(--fs-lg);
  }
}