.app-shell {
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  display: grid;
  grid-template-rows: 64px minmax(0, 1fr);
  overflow: hidden;
}

.app-header {
  position: relative;
  z-index: var(--z-header);
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(230px, 1fr) auto minmax(360px, 1fr);
  align-items: center;
  gap: var(--space-4);
  padding: 0 var(--space-5);
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface), transparent 2%);
  box-shadow: var(--shadow-sm);
}

.brand {
  width: max-content;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--color-text);
  text-decoration: none;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: #fff;
  background: var(--color-accent-strong);
  font: 700 12px/1 var(--font-mono);
  letter-spacing: 0.06em;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand-copy strong {
  font-size: 14px;
  letter-spacing: 0.01em;
}
.brand-copy small {
  margin-top: 3px;
  color: var(--color-text-muted);
  font-size: 12px;
}

.header-session {
  min-width: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  color: var(--color-text-secondary);
  font-size: 12px;
}

.session-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-text-muted);
}
.header-session.is-ready .session-dot {
  background: var(--color-success);
  box-shadow: 0 0 0 4px var(--color-success-soft);
}
.header-session.is-busy .session-dot {
  background: var(--color-highlight);
  animation: pulse 1.1s ease-in-out infinite;
}
.header-session.is-error .session-dot {
  background: var(--color-danger);
}

@keyframes pulse {
  50% {
    opacity: 0.45;
    transform: scale(0.82);
  }
}

.header-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.workspace {
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-columns: 300px minmax(420px, 1fr) 360px;
  gap: 1px;
  overflow: hidden;
  background: var(--color-border);
}

.workflow-panel,
.results-panel,
.viewer-panel {
  min-width: 0;
  min-height: 0;
  background: var(--color-surface);
}

.workflow-panel,
.results-panel {
  display: flex;
  flex-direction: column;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

.workflow-panel {
  padding: var(--space-5);
}
.results-panel {
  padding: var(--space-5);
}

.panel-heading {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.eyebrow {
  display: block;
  margin-bottom: 3px;
  color: var(--color-accent);
  font: 700 12px/1 var(--font-mono);
  letter-spacing: 0.12em;
}

.viewer-panel {
  display: grid;
  grid-template-rows: 54px minmax(0, 1fr) 36px;
  overflow: hidden;
  background: var(--color-canvas);
}

.viewer-header,
.viewer-footer {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  color: #dce7e3;
  background: #1a2320;
  border-color: #303b37;
}

.viewer-header {
  justify-content: space-between;
  padding: 0 var(--space-4);
  border-bottom: 1px solid #303b37;
}
.viewer-footer {
  justify-content: space-between;
  padding: 0 var(--space-4);
  border-top: 1px solid #303b37;
  font-size: 12px;
}
.viewer-file {
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.viewer-file strong,
.viewer-file span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.viewer-file strong {
  color: #f5f8f7;
  font-size: 13px;
}
.viewer-file span {
  color: #9fb0aa;
  font-size: 12px;
}
.viewer-readout {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: #bdcac6;
  font: 12px/1 var(--font-mono);
  white-space: nowrap;
}
.viewer-readout i {
  width: 1px;
  height: 14px;
  background: #46534f;
}
.results-drawer-toggle,
.results-close {
  display: none;
}

.mobile-action-bar {
  display: none;
}