.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--color-bg-elevated);
  border-right: 1px solid var(--color-border);
  padding: 28px 0;
  position: relative;
}

.sidebar-rail {
  position: absolute;
  left: 39px;
  top: 52px;
  bottom: 52px;
  width: 2px;
  background: var(--color-border);
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  text-align: left;
  padding: 14px 20px;
  background: none;
  border: none;
  color: var(--color-text-muted);
  position: relative;
  cursor: pointer;
}

.sidebar-item .step-badge {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  background: var(--color-bg-elevated-2);
  color: var(--color-text-muted);
  border: 2px solid var(--color-border);
  z-index: 1;
}

.sidebar-item .step-label {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.sidebar-item .step-label .step-eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.7;
}

.sidebar-item .step-label .step-title {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
}

.sidebar-item.completed .step-badge {
  background: var(--color-accent-production);
  border-color: var(--color-accent-production);
  color: var(--color-bg-elevated);
}

.sidebar-item.active .step-badge {
  border-color: var(--color-accent-production);
  color: var(--color-accent-production);
  background: var(--color-accent-production-soft);
}

.sidebar-item.active .step-title {
  color: var(--color-text);
}

.sidebar-item.disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.main-content {
  flex: 1;
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 640px;
  min-width: 0;
}

.header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-bar h1 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.header-bar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.reset-button {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  border-radius: 6px;
  padding: 8px 12px;
  font-family: var(--font-body);
  font-size: 13px;
  cursor: pointer;
}

.header-flow {
  padding: 4px 0 12px;
  border-bottom: 1px solid var(--color-border);
}

.results-panel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.help-panel {
  width: 300px;
  flex-shrink: 0;
  padding: 28px 24px;
  border-left: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
}

.help-panel .help-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-production);
  margin-bottom: 6px;
  display: block;
}

.help-panel h2 {
  font-family: var(--font-display);
  font-size: 18px;
  margin-bottom: 16px;
}

.help-entry {
  margin-bottom: 18px;
}

.help-entry dt {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  margin-bottom: 3px;
}

.help-entry dd {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0;
}

@media (max-width: 1080px) {
  .help-panel { display: none; }
}

@media (max-width: 720px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; padding: 16px 0; }
  .sidebar-rail { display: none; }
  .results-panel { grid-template-columns: 1fr; }
  .main-content { padding: 20px; max-width: none; }
}