/* Header */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0 14px;
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--surface-2) 88%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  z-index: 5;
}

.topbar h1 {
  font-size: 21px;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 0;
  cursor: pointer;
  transition: color 0.15s ease;
}

.back-btn:hover {
  color: var(--text-primary);
}

.icon-btn {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-secondary);
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.12s ease, background 0.15s ease;
}

.icon-btn:active {
  background: var(--surface-3);
  transform: scale(0.96);
}

.section-heading {
  font-size: 15px;
  font-weight: 650;
  color: var(--text-secondary);
  margin: 22px 0 10px;
}

.section-heading:first-of-type {
  margin-top: 4px;
}

.log-hint {
  font-style: italic;
  font-size: 12px;
  color: var(--text-muted);
  margin: -4px 0 12px;
}