:root {
  color-scheme: dark;
  --bg: #17181b;
  --panel: #1e2024;
  --panel-2: #24262b;
  --border: #34363c;
  --text: #e7e8ea;
  --text-dim: #9a9da3;
  --accent: #4f8cff;
  --accent-2: #3a6fd8;
  --danger: #e5534b;
  --ok: #3fb950;
  --axis-x: #e5534b;
  --axis-y: #3fb950;
  --axis-z: #4f8cff;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  flex: 1 1 340px;
  min-width: 0;
  flex-direction: column;
  gap: 0.2rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.brand-copy {
  margin: 0;
  max-width: 72ch;
  color: var(--text-dim);
  font-size: 0.82rem;
  line-height: 1.45;
}

header h1 {
  font-size: 1.05rem;
  font-weight: 650;
  margin: 0;
}

header .filename {
  color: var(--text-dim);
  font-size: 0.85rem;
  max-width: 32vw;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  align-self: center;
}

main {
  flex: 1;
  display: flex;
  min-height: 0;
}

#tool-rail {
  width: 68px;
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.3rem;
  padding: 0.5rem 0.35rem;
}

.tool-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0.5rem 0.2rem;
  color: var(--text-dim);
}
.tool-btn:hover:not(:disabled) { background: var(--panel-2); border-color: var(--border); }
.tool-btn.active {
  background: var(--accent);
  border-color: var(--accent-2);
  color: #fff;
}
.tool-btn-icon { font-size: 1.3rem; line-height: 1; }
.tool-btn-label { font-size: 0.68rem; text-align: center; line-height: 1.15; }

#viewer-wrap {
  position: relative;
  flex: 1;
  min-width: 0;
}

#viewer {
  position: absolute;
  inset: 0;
}

#dropzone-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.75rem;
  color: var(--text-dim);
  pointer-events: none;
  text-align: center;
  padding: 2rem;
}

#dropzone-hint strong { color: var(--text); font-size: 1.1rem; }

#viewer-wrap.drag-over::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 2px dashed var(--accent);
  border-radius: 8px;
  pointer-events: none;
}

#viewer-toolbar {
  position: absolute;
  top: 10px;
  left: 10px;
  display: flex;
  gap: 0.4rem;
  z-index: 2;
}

#viewer-status {
  position: absolute;
  bottom: 10px;
  left: 10px;
  z-index: 2;
  color: var(--text-dim);
  font-size: 0.78rem;
  background: rgba(0, 0, 0, 0.35);
  padding: 0.3rem 0.55rem;
  border-radius: 6px;
  max-width: 60vw;
}

#camera-controls {
  position: absolute;
  right: 14px;
  bottom: 14px;
  z-index: 4;
  width: 216px;
  padding: 6px;
  border: 1px solid rgba(59, 70, 87, 0.8);
  border-radius: 11px;
  background: rgba(14, 17, 22, 0.86);
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
}
.camera-projection,
.camera-presets { display: grid; gap: 4px; }
.camera-projection {
  grid-template-columns: 1fr 1fr;
  margin-bottom: 4px;
}
.camera-presets { grid-template-columns: repeat(3, 1fr); }
#camera-controls .small { min-width: 0; padding-inline: 6px; }
#camera-controls .active {
  color: #fff;
  border-color: var(--accent);
  background: rgba(91, 140, 255, 0.3);
}

aside {
  width: 300px;
  flex-shrink: 0;
  background: var(--panel);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

details {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
  padding: 0.55rem 0.65rem;
}

details summary {
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
}

details summary::marker {
  color: var(--text-dim);
}

details p {
  margin: 0.4rem 0 0;
  color: var(--text-dim);
  font-size: 0.76rem;
  line-height: 1.5;
}

fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 0.7rem 0.8rem;
  margin: 0;
}

legend {
  padding: 0 0.4rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

.axis-row {
  display: grid;
  grid-template-columns: 1.1em 1fr auto auto;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.4rem;
}

.axis-row:last-child { margin-bottom: 0; }

.axis-label { font-weight: 700; }
.axis-label.x { color: var(--axis-x); }
.axis-label.y { color: var(--axis-y); }
.axis-label.z { color: var(--axis-z); }

input[type="number"] {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 5px;
  padding: 0.32rem 0.4rem;
  font-size: 0.85rem;
}

select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 5px;
  padding: 0.32rem 0.4rem;
  font-size: 0.8rem;
}

input[type="color"] {
  width: 2.2rem;
  height: 1.7rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: none;
  cursor: pointer;
}

input[type="number"]:focus, select:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

button {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 5px;
  padding: 0.32rem 0.55rem;
  font-size: 0.8rem;
  cursor: pointer;
}

button:hover { background: #2c2f35; }
button:disabled { opacity: 0.45; cursor: not-allowed; }

button.primary {
  background: var(--accent);
  border-color: var(--accent-2);
  color: white;
  font-weight: 600;
}
button.primary:hover { background: var(--accent-2); }

button.small { padding: 0.28rem 0.4rem; font-size: 0.75rem; }

.origin-option {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.35rem;
  font-size: 0.85rem;
}

.origin-custom-fields {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.3rem;
  margin: 0.35rem 0 0.4rem 1.5rem;
}

.origin-custom-fields input { padding: 0.25rem 0.3rem; font-size: 0.78rem; }

.actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.actions button { width: 100%; padding: 0.55rem; font-size: 0.9rem; }

.view-toggles {
  display: flex;
  gap: 0.9rem;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.view-toggles label { display: flex; align-items: center; gap: 0.3rem; cursor: pointer; }

.info-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-dim);
}
.info-row b { color: var(--text); font-weight: 500; }
.info-row[hidden] { display: none; }

#status-bar {
  padding: 0.35rem 1rem;
  background: var(--panel);
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-dim);
  flex-shrink: 0;
  min-height: 1.6em;
}
#status-bar.error { color: var(--danger); }
#status-bar.ok { color: var(--ok); }

/* Single-slot toast: #status-bar's feedback is easy to miss since it sits far from
   wherever the user is actually looking/clicking - this surfaces the same message
   briefly near the top of the viewport too. No queueing - one message at a time is
   enough for how this app currently uses ui.setStatus(). */
#toast {
  position: fixed;
  top: 14px;
  right: 14px;
  z-index: 80;
  max-width: min(420px, calc(100vw - 28px));
  padding: 0.6rem 0.9rem;
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.35);
  font-size: 0.82rem;
  line-height: 1.4;
  color: var(--text);
}
#toast[hidden] { display: none; }
#toast.ok { border-color: var(--ok); color: var(--ok); }
#toast.error { border-color: var(--danger); color: var(--danger); }

#file-input { display: none; }

/* Tool popups: a floating, non-blocking card docked to the top-right corner of
   the viewer, one per tool (only one visible via [hidden] at a time). Each only
   occupies its own box, so clicks elsewhere on the canvas (for point picking /
   direction dragging) always reach the viewer underneath. */
.tool-popup {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 6;
  width: 320px;
  max-width: calc(100% - 20px);
  max-height: calc(100% - 20px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.8rem 0.9rem 0.9rem;
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.45);
}
.tool-popup[hidden] { display: none; }

.tool-popup-header {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.tool-popup-title {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  margin-right: auto;
}
.tool-popup-title strong { font-size: 0.88rem; }
.tool-popup-stepline { font-size: 0.72rem; color: var(--text-dim); }

.tool-stepper {
  display: flex;
  gap: 0.3rem;
  flex-shrink: 0;
  margin-top: 0.05rem;
}
.tool-dot {
  width: 1.3rem;
  height: 1.3rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.66rem;
  font-weight: 700;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.tool-dot.active { background: var(--accent); border-color: var(--accent-2); color: #fff; }
.tool-dot.done { border-color: var(--ok); color: var(--ok); }

.tool-popup-close {
  flex-shrink: 0;
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 1.15rem;
  line-height: 1;
  padding: 0.05rem 0.3rem;
}
.tool-popup-close:hover { color: var(--text); background: var(--panel-2); border-radius: 4px; }

.wizard-step {
  border: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
}
.wizard-step[hidden] { display: none; }
.wizard-step legend {
  padding: 0 0 0.3rem;
  font-size: 0.85rem;
  text-transform: none;
  letter-spacing: normal;
  font-weight: 600;
  color: var(--text);
}

.wizard-progress {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin: 0.3rem 0 0.5rem;
}

.wizard-buttons {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-bottom: 0.6rem;
}

.wizard-nav {
  display: flex;
  gap: 0.4rem;
  justify-content: space-between;
  margin-top: 0.6rem;
}
.wizard-nav button { flex: 1; }

#wizard-step-origin .origin-option { font-size: 0.82rem; }
#wizard-step-origin .origin-custom-fields { margin-left: 1.5rem; }
#guided-origin-pick { margin: 0.2rem 0 0; width: 100%; }

.hint { font-size: 0.75rem; color: var(--text-dim); line-height: 1.4; margin: 0.2rem 0 0; }
.form-error { color: var(--danger); }
.form-error[hidden] { display: none; }
.method-switch {
  display: grid;
  gap: 6px;
  margin: 2px 0 12px;
}
.method-switch label {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
  cursor: pointer;
}
.method-switch label:has(input:checked) {
  border-color: var(--accent);
  background: rgba(91, 140, 255, 0.12);
}
.quality-card {
  margin: 9px 0;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
}
.quality-card > div:first-child { display: flex; justify-content: space-between; gap: 12px; }
.quality-card strong[data-quality="hoch"] { color: var(--ok); }
.quality-card strong[data-quality="mittel"] { color: var(--warning); }
.quality-card strong[data-quality="niedrig"] { color: var(--danger); }
.quality-meter {
  height: 5px;
  margin-top: 8px;
  overflow: hidden;
  border-radius: 99px;
  background: var(--border);
}
.quality-meter span { display: block; height: 100%; background: var(--accent); }
.quality-meter span[data-quality="hoch"] { background: var(--ok); }
.quality-meter span[data-quality="mittel"] { background: var(--warning); }
.quality-meter span[data-quality="niedrig"] { background: var(--danger); }
.quality-card p { margin: 8px 0 0; color: var(--text-dim); font-size: 0.72rem; line-height: 1.45; }
.full-width { width: 100%; }
.plane-direction-picker {
  margin-top: 8px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.015);
}
.plane-direction-picker > strong {
  display: block;
  margin-bottom: 8px;
  font-size: 0.78rem;
}

.point-size-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.6rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}
.point-size-row input[type="range"] { width: 100%; }
.point-size-row b { color: var(--text); font-weight: 500; min-width: 2.6em; text-align: right; }

#slice-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.slice-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.5rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.slice-row-main {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}
.slice-row-name { font-size: 0.83rem; }
.slice-row-thickness { font-size: 0.7rem; color: var(--text-dim); }
.slice-row-actions { display: flex; gap: 0.25rem; flex-shrink: 0; flex-wrap: wrap; }
.slice-row-actions button { padding: 0.2rem 0.35rem; font-size: 0.7rem; }
.slice-row-export { display: flex; gap: 0.25rem; flex-shrink: 0; flex-wrap: wrap; width: 100%; justify-content: flex-end; }
.slice-row-export button { padding: 0.2rem 0.4rem; font-size: 0.68rem; }

.export-option {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}

dialog#loading {
  border: none;
  border-radius: 10px;
  background: var(--panel);
  color: var(--text);
  padding: 1.2rem 1.6rem;
}
dialog#loading::backdrop { background: rgba(0, 0, 0, 0.5); }

#loading-progress-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.6rem;
}
#loading-progress { flex: 1; height: 0.6rem; accent-color: var(--accent); }

.view-axis-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.35rem;
  margin-bottom: 0.4rem;
}
.view-axis-grid button { padding: 0.4rem 0.2rem; }

.view-preview-wrap {
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  align-items: center;
}

/* 2026 workspace shell -----------------------------------------------------
   This section re-declares several selectors already defined above (`:root`,
   `#tool-rail`, `.tool-btn`, `#viewer-toolbar`, `#dropzone-hint`, ...) rather than
   overriding them namespaced/scoped - later rules win by source order. This exact
   mechanism previously caused a real bug (`#viewer-status { display: none; }` here
   silently killed 44 call sites of live wizard feedback defined against the
   legacy rule above). When touching a selector that also exists above this
   comment, check both locations, or the same class of bug will resurface. */
:root {
  --bg: #0b0d11;
  --panel: #13161c;
  --panel-2: #1a1e26;
  --panel-3: #222833;
  --border: #2a313d;
  --border-strong: #3b4657;
  --text: #f1f4f8;
  --text-dim: #9ba7b7;
  --accent: #5b8cff;
  --accent-2: #3f6ed8;
  --danger: #ff6b6b;
  --ok: #48c78e;
  --warning: #f5b942;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --panel-width: clamp(320px, 25vw, 390px);
  --focus: 0 0 0 3px rgba(91, 140, 255, 0.32);
}

.app-bar {
  min-height: 56px;
  padding: 8px 12px;
  align-items: center;
  flex-wrap: nowrap;
  gap: 16px;
  background: rgba(19, 22, 28, 0.98);
}

.brand {
  flex: 0 0 auto;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 9px;
  color: var(--text);
  text-decoration: none;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(145deg, #6d9aff, #3d64c5);
  color: white;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.brand h1 { font-size: 0.95rem; }

.document-context {
  min-width: 0;
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
}
.app-actions { display: flex; align-items: center; gap: 8px; }
.app-actions button { min-height: 36px; padding-inline: 12px; }
.icon-button {
  width: 36px;
  min-width: 36px;
  min-height: 36px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  font-size: 1rem;
}

#tool-rail {
  width: 76px;
  padding: 10px 7px;
  gap: 5px;
  background: #101319;
}
.tool-group-label {
  margin: 7px 2px 3px;
  color: #697588;
  font-size: 0.58rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
}
.tool-group-label:first-child { margin-top: 0; }
.tool-btn {
  min-height: 58px;
  border-radius: 10px;
}
.tool-btn.active {
  background: rgba(91, 140, 255, 0.16);
  border-color: rgba(91, 140, 255, 0.55);
  color: #dce7ff;
  box-shadow: inset 3px 0 var(--accent);
}
.tool-btn:disabled { opacity: 0.35; }

#viewer-wrap { background: radial-gradient(circle at 50% 45%, #151a22, #090b0f 70%); }
#viewer-toolbar {
  top: 12px;
  left: 12px;
  padding: 5px;
  border: 1px solid rgba(59, 70, 87, 0.75);
  border-radius: 10px;
  background: rgba(14, 17, 22, 0.82);
  backdrop-filter: blur(10px);
}
#viewer-instruction {
  position: absolute;
  top: 16px;
  left: 50%;
  z-index: 5;
  max-width: min(460px, 60%);
  transform: translateX(-50%);
  padding: 8px 12px;
  border: 1px solid rgba(91, 140, 255, 0.5);
  border-radius: 999px;
  background: rgba(19, 27, 42, 0.92);
  color: #dce7ff;
  font-size: 0.78rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  pointer-events: none;
}
#dropzone-hint {
  margin: clamp(18px, 5vw, 64px);
  border: 1px dashed var(--border-strong);
  border-radius: 18px;
  background: rgba(19, 22, 28, 0.5);
}
#dropzone-hint .empty-icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  color: var(--accent);
  font-size: 1.7rem;
}
#dropzone-hint small { color: #738095; }

#sidebar {
  width: var(--panel-width);
  padding: 0;
  gap: 0;
  background: var(--panel);
  transition: width 180ms ease, transform 180ms ease;
}
.context-panel-header {
  position: sticky;
  top: 0;
  z-index: 4;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 18px 18px 8px;
  background: linear-gradient(var(--panel) 80%, rgba(19, 22, 28, 0));
}
.context-panel-header h2 {
  margin: 2px 0 0;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.context-kicker {
  margin: 0;
  color: var(--accent);
  font-size: 0.65rem;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.context-description {
  margin: 0;
  padding: 0 18px 16px;
  color: var(--text-dim);
  font-size: 0.78rem;
  line-height: 1.45;
  border-bottom: 1px solid var(--border);
}
#tool-panel-host { display: contents; }

.tool-popup {
  position: static;
  width: auto;
  max-width: none;
  max-height: none;
  padding: 16px 18px 20px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  overflow: visible;
}
.tool-popup-header { padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.tool-popup-title strong { display: none; }
.tool-popup-close { display: none; }
.tool-stepper { gap: 6px; }
.tool-dot {
  width: 25px;
  height: 25px;
}
.wizard-step legend { font-size: 0.92rem; margin-top: 4px; }
.wizard-nav {
  position: sticky;
  bottom: 0;
  z-index: 2;
  padding: 12px 0 2px;
  background: linear-gradient(rgba(19, 22, 28, 0), var(--panel) 24%);
}
.wizard-nav button { min-height: 38px; }

#sidebar > fieldset,
#sidebar > details,
#sidebar > .actions {
  margin: 12px 16px 0;
}
#sidebar > .actions { margin-bottom: 18px; }
body[data-active-tool]:not([data-active-tool="overview"]) #sidebar > fieldset,
body[data-active-tool]:not([data-active-tool="overview"]) #sidebar > details,
body[data-active-tool]:not([data-active-tool="overview"]) #sidebar > .actions {
  display: none;
}
body[data-active-tool="align"] #fieldset-transform,
body[data-active-tool="align"] #fieldset-translation,
body[data-active-tool="align"] #sidebar > .actions {
  display: block;
}
body[data-active-tool="align"] #btn-save { display: none; }

fieldset { border-radius: var(--radius-md); }
input[type="number"], select, button { min-height: 34px; border-radius: var(--radius-sm); }
input[type="number"]:focus, select:focus-visible, button:focus-visible, a:focus-visible {
  outline: none;
  box-shadow: var(--focus);
  border-color: var(--accent);
}
.slice-row { padding: 9px; border-radius: 8px; }
.slice-row-actions button:last-child { color: #ff9b9b; }

body.panel-collapsed #sidebar {
  width: 0;
  min-width: 0;
  overflow: hidden;
  border-left: 0;
}

#status-bar {
  min-height: 28px;
  padding: 6px 12px 6px 88px;
  background: #101319;
}

dialog {
  max-width: min(520px, calc(100vw - 32px));
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
}
dialog::backdrop { background: rgba(2, 4, 8, 0.68); backdrop-filter: blur(2px); }
#help-dialog { padding: 18px; }
.dialog-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.dialog-header h2 { margin: 3px 0 0; }
#help-dialog > p { color: var(--text-dim); line-height: 1.55; }
.shortcut-list { display: grid; gap: 7px; }
.shortcut-list div { display: grid; grid-template-columns: 105px 1fr; gap: 10px; }
.shortcut-list dt { color: var(--text); font-weight: 650; }
.shortcut-list dd { margin: 0; color: var(--text-dim); }

@media (max-width: 980px) {
  #sidebar {
    position: absolute;
    z-index: 20;
    top: 56px;
    right: 0;
    bottom: 28px;
    width: min(390px, calc(100vw - 76px));
    box-shadow: -18px 0 48px rgba(0, 0, 0, 0.42);
  }
  body.panel-collapsed #sidebar {
    width: min(390px, calc(100vw - 76px));
    transform: translateX(102%);
  }
}

@media (max-width: 700px) {
  .brand h1 { display: none; }
  .app-bar { gap: 8px; }
  .document-context { max-width: 30vw; }
  #btn-export-global { display: none; }
  #viewer-toolbar { flex-direction: column; align-items: stretch; }
  #viewer-instruction { top: 120px; max-width: calc(100% - 28px); width: max-content; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}