.app-body {
  height: 100dvh;
  overflow: hidden;
}

.signum {
  --topbar-height: 52px;
  --sidebar-width: 236px;
  --inspector-width: 344px;
  display: grid;
  grid-template-rows: var(--topbar-height) minmax(0, 1fr);
  height: 100dvh;
  background: var(--background);
}

.signum[data-state="landing"] {
  grid-template-rows: var(--topbar-height) auto;
  overflow-y: auto;
}

.signum-topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-width: 0;
  padding: 0 var(--space-4);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--background) 84%, transparent);
  backdrop-filter: blur(14px) saturate(1.5);
  -webkit-backdrop-filter: blur(14px) saturate(1.5);
}

.signum-topbar .brand {
  flex: none;
}

.crumbs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
  font-size: 13.5px;
  font-weight: 500;
}

.crumbs > a {
  color: var(--text-muted);
  white-space: nowrap;
}

.crumbs > a:hover {
  color: var(--text);
}

.crumb-separator {
  color: var(--text-subtle);
}

.crumb-separator::before {
  content: "/";
}

.crumb-file {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}

.crumb-file[hidden] {
  display: none;
}

.file-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
}

.file-chip .icon {
  color: var(--accent-text);
}

.file-chip span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

.menu-anchor {
  position: relative;
}

.signum[data-state="landing"] .menu-anchor {
  display: none;
}

.export-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  z-index: 60;
  display: grid;
  width: min(320px, calc(100vw - 24px));
  padding: 4px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-large);
  background: var(--surface);
  box-shadow: var(--shadow-large);
  animation: palette-in 160ms var(--ease-out) both;
}

.export-menu button {
  display: grid;
  gap: 1px;
  width: 100%;
  padding: 8px 10px;
  border: 0;
  border-radius: var(--radius);
  background: none;
  text-align: left;
}

.export-menu button:hover,
.export-menu button:focus-visible {
  background: var(--surface-hover);
  outline: none;
}

.export-menu strong {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 600;
}

.menu-extension {
  color: var(--text-subtle);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 400;
}

.export-menu small {
  color: var(--text-muted);
  font-size: 12px;
}

.signum-landing {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: var(--space-16) var(--space-6) var(--space-20);
}

.landing-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: var(--space-12);
  align-items: center;
}

.landing-copy h1 {
  margin-top: var(--space-4);
  font-size: clamp(40px, 6vw, 60px);
  font-weight: 650;
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.landing-copy > p {
  max-width: 540px;
  margin-top: var(--space-5);
  color: var(--text-muted);
  font-size: 17px;
  line-height: 1.6;
  text-wrap: pretty;
}

.landing-points {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-8);
  padding: 0;
  list-style: none;
  color: var(--text-muted);
  font-size: 14.5px;
}

.landing-points li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.landing-points .icon {
  color: var(--accent-text);
}

.dropzone {
  position: relative;
  display: grid;
  justify-items: center;
  gap: var(--space-3);
  padding: var(--space-12) var(--space-8) var(--space-10);
  overflow: hidden;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-extra-large);
  background: var(--surface);
  text-align: center;
  cursor: pointer;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.dropzone:hover,
.signum.dragging .dropzone {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.dropzone-glow {
  position: absolute;
  inset: -40% -20% auto;
  height: 280px;
  background: radial-gradient(closest-side, var(--glow), transparent);
  pointer-events: none;
}

.dropzone-icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--background-subtle);
  color: var(--accent-text);
  box-shadow: var(--shadow-medium);
}

.dropzone h2 {
  margin-top: var(--space-2);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.dropzone > p {
  max-width: 320px;
  color: var(--text-muted);
  font-size: 14px;
}

.dropzone .button {
  margin-top: var(--space-2);
}

.dropzone-error {
  color: var(--danger) !important;
}

.landing-examples {
  margin-top: var(--space-16);
}

.section-label {
  margin-bottom: var(--space-4);
  color: var(--text-subtle);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.example-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}

.example-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-large);
  background: var(--surface);
  box-shadow: var(--shadow-small), var(--highlight);
  transition: border-color 150ms ease, background-color 150ms ease;
}

.example-card:hover {
  border-color: var(--border-strong);
  background: var(--surface-raised);
}

.example-mark {
  display: grid;
  flex: none;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--background-subtle);
  color: var(--accent-text);
}

.example-text {
  display: grid;
  flex: 1;
  min-width: 0;
}

.example-text strong {
  font-size: 14px;
  font-weight: 600;
}

.example-text small {
  color: var(--text-subtle);
  font-size: 12px;
}

.example-arrow {
  color: var(--text-subtle);
  transition: transform 200ms var(--ease-out), color 150ms ease;
}

.example-card:hover .example-arrow {
  color: var(--text);
  transform: translateX(2px);
}

.landing-notes {
  margin-top: var(--space-16);
}

.signum.dragging::after {
  content: "Drop to open the spectrum";
  position: fixed;
  inset: var(--space-3);
  z-index: 200;
  display: grid;
  place-items: center;
  border: 2px dashed var(--accent);
  border-radius: var(--radius-extra-large);
  background: color-mix(in srgb, var(--background) 80%, transparent);
  color: var(--text);
  font-size: 20px;
  font-weight: 600;
  pointer-events: none;
}

.signum-workbench {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--inspector-width);
  min-height: 0;
}

.signum-workbench[hidden] {
  display: none;
}

.signum-sidebar {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow-y: auto;
  padding: var(--space-2) var(--space-3);
  border-right: 1px solid var(--border);
  background: var(--background-subtle);
}

.sidebar-label {
  margin: var(--space-3) var(--space-2) var(--space-2);
  color: var(--text-subtle);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.document-list,
.example-list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.document {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  padding: 4px 4px 4px 8px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: background-color 120ms ease;
}

.document:hover {
  background: var(--surface-hover);
}

.document.is-active {
  border-color: var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-small);
}

.document.is-incompatible {
  opacity: 0.72;
}

.document-swatch {
  flex: none;
  width: 14px;
  height: 14px;
  padding: 0;
  border: 2px solid var(--swatch);
  border-radius: 4px;
  background: var(--swatch);
}

.document-swatch[aria-pressed="false"] {
  background: transparent;
}

.document.is-incompatible .document-swatch {
  border-style: dashed;
  background: transparent;
}

.document-name {
  display: grid;
  flex: 1;
  min-width: 0;
  padding: 2px 0;
  border: 0;
  background: none;
  text-align: left;
}

.document-name strong {
  overflow: hidden;
  font-size: 13px;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.document-name small {
  overflow: hidden;
  color: var(--text-subtle);
  font-size: 11.5px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.document-close,
.row-remove {
  display: grid;
  flex: none;
  place-items: center;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-small);
  background: none;
  color: var(--text-subtle);
  opacity: 0;
  transition: opacity 120ms ease, background-color 120ms ease, color 120ms ease;
}

.document:hover .document-close,
.document.is-active .document-close,
tr:hover .row-remove,
.integral-row:hover .row-remove,
.document-close:focus-visible,
.row-remove:focus-visible {
  opacity: 1;
}

.document-close:hover,
.row-remove:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 32px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-small);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  transition: background-color 120ms ease, color 120ms ease;
}

.sidebar-link span {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-link small {
  color: var(--text-subtle);
  font-size: 11.5px;
  white-space: nowrap;
}

.sidebar-link:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.sidebar-footer {
  margin-top: auto;
  padding-top: var(--space-4);
}

.sidebar-footer .button {
  width: 100%;
  justify-content: flex-start;
}

.signum-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

.signum-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
}

.segmented button[aria-pressed="true"] {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-small), 0 0 0 1px var(--border);
}

.segmented button[aria-pressed="true"] .icon {
  color: var(--accent-text);
}

.overlay-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 13px;
  cursor: pointer;
}

.overlay-toggle[hidden] {
  display: none;
}

.overlay-toggle input {
  accent-color: var(--accent);
}

.toolbar-hint {
  display: flex;
  flex: 1 1 200px;
  flex-wrap: wrap;
  justify-content: flex-end;
  column-gap: 0.4em;
  min-width: 0;
  height: 16px;
  overflow: hidden;
  color: var(--text-subtle);
  font-size: 12.5px;
  line-height: 16px;
}

.toolbar-hint > span {
  white-space: nowrap;
}

.toolbar-hint > span + span::before {
  content: "· ";
}

.signum-notice {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  margin: var(--space-3) var(--space-4) 0;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-large);
  background: var(--accent-soft);
  font-size: 13px;
}

.signum-notice[hidden] {
  display: none;
}

.signum-notice > .icon {
  color: var(--accent-text);
}

.signum-notice p {
  flex: 1 1 260px;
  min-width: 0;
}

.signum-plot {
  position: relative;
  flex: 1;
  min-height: 280px;
  margin: var(--space-3) var(--space-4) var(--space-4);
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-large);
  background: var(--surface);
  box-shadow: var(--shadow-small), var(--highlight);
}

.signum-plot[data-loading]::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, var(--accent-soft), transparent);
  background-size: 50% 100%;
  background-repeat: no-repeat;
  animation: plot-loading 1.1s ease-in-out infinite;
  pointer-events: none;
}

@keyframes plot-loading {
  from {
    background-position: -50% 0;
  }
  to {
    background-position: 150% 0;
  }
}

.signum-inspector {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  border-left: 1px solid var(--border);
  background: var(--background);
}

.inspector-tabs {
  display: flex;
  gap: 2px;
  padding: 0 var(--space-3);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.inspector-tabs button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 44px;
  padding: 0 var(--space-2);
  border: 0;
  border-bottom: 2px solid transparent;
  background: none;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
}

.inspector-tabs button:hover {
  color: var(--text);
}

.inspector-tabs button[aria-selected="true"] {
  border-bottom-color: var(--accent);
  color: var(--text);
}

.tab-count {
  color: var(--text-subtle);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
}

.inspector-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding-bottom: var(--space-8);
}

.inspector-section {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border);
}

.inspector-section.flush {
  padding: 0;
}

.inspector-section > h3 {
  margin-bottom: var(--space-3);
  font-size: 13px;
  font-weight: 600;
}

.inspector-section > * + * {
  margin-top: var(--space-3);
}

.inspector-section > h3 + * {
  margin-top: 0;
}

.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.section-note {
  color: var(--text-subtle);
  font-size: 12.5px;
  line-height: 1.5;
}

.field-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.inspector-section .fields {
  gap: var(--space-3);
}

.inspector-section .input-group .input {
  padding-right: 44px;
}

.panel-empty {
  display: grid;
  justify-items: center;
  gap: var(--space-3);
  padding: var(--space-10) var(--space-6);
  color: var(--text-subtle);
  font-size: 13.5px;
  text-align: center;
}

.panel-empty p {
  max-width: 250px;
}

.peak-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.peak-table th {
  position: sticky;
  top: 0;
  padding: 8px var(--space-3);
  border-bottom: 1px solid var(--border);
  background: var(--background-subtle);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 500;
  text-align: right;
  white-space: nowrap;
}

.peak-table th:first-child,
.peak-table td:first-child {
  padding-left: var(--space-5);
  text-align: left;
}

.peak-table td {
  padding: 5px var(--space-3);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 60%, transparent);
  text-align: right;
}

.peak-table td:last-child,
.peak-table th:last-child {
  width: 36px;
  padding: 0 var(--space-3) 0 0;
}

.peak-table tbody tr {
  cursor: pointer;
}

.peak-table tbody tr:hover {
  background: var(--background-subtle);
}

.report {
  padding: var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--background-subtle);
  font-size: 13px;
  line-height: 1.6;
  overflow-wrap: anywhere;
  user-select: text;
}

.integral-list,
.multiplet-list,
.applied-list {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
}

.integral-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 8px var(--space-3) 8px var(--space-5);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 60%, transparent);
}

.integral-range {
  display: grid;
  flex: 1;
  min-width: 0;
}

.integral-range strong {
  font-size: 13.5px;
  font-weight: 600;
}

.integral-range small {
  color: var(--text-muted);
  font-size: 12px;
}

.integral-value .input {
  width: 76px;
  height: 30px;
  text-align: right;
}

.inspector-section + .inspector-section.flush + .inspector-section {
  border-top: 0;
}

.multiplet-list li {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) 40px;
  gap: var(--space-2);
  padding: 6px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 60%, transparent);
  font-size: 13px;
}

.multiplet-list li span:last-child {
  text-align: right;
}

.applied-list li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 3px 0;
  color: var(--text-muted);
  font-size: 12.5px;
}

.applied-list .icon {
  color: var(--success);
}

details.more > * + * {
  margin-top: var(--space-2);
}

.label-list {
  display: grid;
  margin: 0;
  font-size: 12.5px;
}

.label-list div {
  display: grid;
  grid-template-columns: minmax(0, 42%) minmax(0, 1fr);
  gap: var(--space-3);
  padding: 5px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 60%, transparent);
}

.label-list dt {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11.5px;
  overflow-wrap: anywhere;
}

.label-list dd {
  margin: 0;
  overflow-wrap: anywhere;
  white-space: pre-line;
}

.key-values dd {
  min-width: 0;
  overflow-wrap: anywhere;
}

@media (max-width: 1240px) {
  .signum {
    --sidebar-width: 212px;
    --inspector-width: 312px;
  }
}

@media (max-width: 960px) {
  .app-body {
    height: auto;
    overflow: visible;
  }

  .signum,
  .signum[data-state="landing"] {
    height: auto;
    min-height: 100dvh;
    grid-template-rows: var(--topbar-height) auto;
    overflow: visible;
  }

  .signum-workbench {
    grid-template-columns: minmax(0, 1fr);
  }

  .signum-sidebar {
    flex-direction: row;
    align-items: center;
    gap: var(--space-2);
    overflow-x: auto;
    padding: var(--space-2) var(--space-3);
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .signum-sidebar .sidebar-label,
  .signum-sidebar .example-list,
  .signum-sidebar .sidebar-footer {
    display: none;
  }

  .document-list {
    display: flex;
    gap: var(--space-2);
  }

  .document {
    flex: none;
    max-width: 240px;
    border-color: var(--border);
  }

  .signum-plot {
    flex: none;
    height: min(62vh, 520px);
  }

  .signum-inspector {
    border-top: 1px solid var(--border);
    border-left: 0;
  }

  .inspector-body {
    overflow: visible;
  }

  .toolbar-hint {
    display: none;
  }

  .landing-hero {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-10);
  }
}

@media (max-width: 720px) {
  .example-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 560px) {
  .signum-topbar,
  .topbar-actions {
    gap: 2px;
  }

  .signum-topbar {
    padding: 0 var(--space-2);
  }

  .crumbs > .crumb-home,
  .crumb-home + .crumb-separator,
  .open-button span,
  [data-action="export-menu"] span,
  [data-action="export-menu"] .kit-chevron {
    display: none;
  }

  .open-button,
  [data-action="export-menu"] {
    width: var(--button-height);
    padding: 0;
  }

  .signum-landing {
    padding: var(--space-10) var(--space-4) var(--space-16);
  }

  .dropzone {
    padding: var(--space-8) var(--space-5);
  }

  .signum-toolbar {
    padding: var(--space-2) var(--space-3);
  }

  .signum-toolbar .segmented button span {
    display: none;
  }

  .signum-plot {
    margin: var(--space-2) var(--space-3) var(--space-3);
    height: 58vh;
    min-height: 300px;
  }

  .signum-notice {
    margin: var(--space-2) var(--space-3) 0;
  }
}

@media (max-width: 359px) {
  .crumbs:has(> [data-file-crumb]:not([hidden])) > [data-action="home"],
  .crumb-file > .crumb-separator {
    display: none;
  }
}

@media (pointer: coarse) {
  .signum-topbar .brand,
  .crumbs > a {
    min-width: var(--touch-target);
    min-height: var(--touch-target);
  }

  .signum-topbar .brand {
    justify-content: center;
  }

  .crumbs > a {
    display: inline-flex;
    align-items: center;
  }
}