:root {
  color-scheme: dark;
  --bg: #0a0e14;
  --sidebar: #0e141c;
  --surface: #121a24;
  --surface-raised: #17212d;
  --surface-soft: #101720;
  --border: #273543;
  --border-bright: #3a4b5c;
  --text: #e7edf3;
  --muted: #91a1b1;
  --accent: #1e6592;
  --accent-bright: #3c8dbc;
  --accent-soft: #153a52;
  --purple: #9b7bd4;
  --warning: #d4a853;
  --danger: #dc6d78;
  --radius: 10px;
  --sidebar-width: 390px;
  --top-height: 43%;
  --hist-width: 48%;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

button,
input,
select { font: inherit; }

button { color: inherit; }

.hidden { display: none !important; }

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.sidebar {
  min-width: 0;
  height: 100%;
  overflow-y: auto;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  scrollbar-color: var(--border-bright) transparent;
}

.brand-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 92px;
  gap: 14px;
  align-items: center;
  min-height: 88px;
  padding: 16px 18px 12px;
  border-bottom: 1px solid var(--border);
}

.brand-logo { width: 100%; max-width: 245px; height: auto; }

.header-links {
  display: grid;
  grid-template-columns: repeat(2, 48px);
  gap: 6px;
  justify-content: end;
  margin-right: -10px;
}

.header-link {
  display: grid;
  place-items: center;
  width: 45px;
  height: 45px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface);
  color: #c9d8e4;
  text-decoration: none;
  font-size: 10px;
  font-weight: 750;
  letter-spacing: .02em;
  transition: border-color 0.8s cubic-bezier(0.74, 0, 0.21, 1.01), background 0.4s cubic-bezier(0.74, 0, 0.21, 1.01), color 0.3s cubic-bezier(0.74, 0, 0.21, 1.01);
  /*transition: border-color 420ms ease, background 320ms ease, color 620ms ease;*/
}

.header-link:hover,
.header-link:focus-visible {
  border-color: var(--accent-bright);
  background: var(--accent-soft);
  color: #fff;
  outline: none;
}

.header-link.inactive { opacity: .32; pointer-events: none; }

.header-link img {
  width: 27px;
  height: 27px;
  display: block;
  object-fit: contain;
  transition: all 0.8s cubic-bezier(0.74, 0, 0.21, 1.01);
}

.header-link:hover img {
  transform: scale(1.28);
}

.header-link.inactive img {
  opacity: 0.5;
}


.tabs {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 10px 14px 0;
  background: color-mix(in srgb, var(--sidebar) 94%, transparent);
  backdrop-filter: blur(10px);
}

.tab {
  height: 42px;
  border: 0;
  border-bottom: 2px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-weight: 680;
}

.tab.active { color: var(--text); border-bottom-color: var(--accent-bright); }
.tab:disabled { opacity: .38; cursor: not-allowed; }

.tab-panel { padding: 14px; }
.tab-panel:not(.active) { display: none; }

.accordion {
  margin-bottom: 10px;
  overflow: clip;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.accordion > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 46px;
  padding: 0 14px;
  cursor: pointer;
  list-style: none;
  font-weight: 690;
  user-select: none;
}

.accordion > summary::-webkit-details-marker { display: none; }
.accordion > summary::after { content: "+"; color: var(--muted); font-size: 18px; font-weight: 400; }
.accordion[open] > summary::after { content: "−"; }
.accordion[open] > summary { border-bottom: 1px solid var(--border); }

.accordion-content { padding: 14px; }

.field,
.file-field {
  display: grid;
  gap: 6px;
  margin-bottom: 13px;
  color: #cbd6df;
  font-size: 13px;
}

.field > span,
.file-field > span { font-weight: 620; }

.field small,
.file-field small {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}

input[type="text"],
input[type="number"],
select,
input[type="file"] {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface-soft);
  color: var(--text);
  outline: none;
}

input[type="text"],
input[type="number"],
select { padding: 7px 9px; }

input[type="file"] { padding: 6px; color: var(--muted); }
input[type="file"]::file-selector-button {
  margin-right: 9px;
  padding: 5px 9px;
  border: 0;
  border-radius: 5px;
  background: var(--accent-soft);
  color: #ddecf5;
  cursor: pointer;
}

input:focus-visible,
select:focus-visible { border-color: var(--accent-bright); box-shadow: 0 0 0 2px #1e659233; }
input:disabled,
select:disabled { opacity: .48; cursor: not-allowed; }

.field-grid { display: grid; gap: 9px; }
.field-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.field-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.field.full { grid-column: 1 / -1; }
.field.compact { margin-bottom: 10px; }

.check-field {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  margin: 10px 0 14px;
  color: #cbd6df;
  font-size: 13px;
  line-height: 1.4;
  cursor: pointer;
}

.check-field input { margin: 2px 0 0; accent-color: var(--accent-bright); }

.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 14px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-soft);
}

.segmented label { cursor: pointer; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span {
  display: grid;
  place-items: center;
  min-height: 33px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 670;
}
.segmented input:checked + span { background: var(--accent); color: white; }

.subheading {
  margin: 16px 0 10px;
  color: #8ebbd5;
  font-size: 11px;
  font-weight: 760;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.option-group {
  margin: 15px 0;
  padding: 10px 10px 0;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.option-group legend { padding: 0 6px; color: #8ebbd5; font-size: 11px; font-weight: 720; }
.option-group:disabled { opacity: .42; }

.primary-button,
.secondary-button,
.toolbar-button {
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
}

.primary-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  height: 44px;
  margin: 14px 0 4px;
  background: var(--accent);
  color: white;
}
.primary-button:hover { background: #2478aa; }
.primary-button:disabled { opacity: .62; cursor: wait; }

.button-spinner,
.large-spinner {
  display: none;
  border: 2px solid #ffffff4d;
  border-top-color: white;
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
.button-spinner { width: 17px; height: 17px; }
.large-spinner { display: block; width: 38px; height: 38px; border-width: 3px; border-color: #3b5368; border-top-color: var(--accent-bright); }
.primary-button.busy .button-spinner { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

.alert {
  margin: 10px 14px 0;
  padding: 10px 12px;
  border: 1px solid;
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.45;
}
.alert.error { border-color: #713743; background: #321c24; color: #f3bac1; }
.alert.warning { margin: 12px 0; border-color: #67502b; background: #2b2417; color: #ead3a2; }

.result-loading {
  display: grid;
  justify-items: center;
  gap: 12px;
  padding: 64px 22px;
  color: var(--muted);
  text-align: center;
}
.result-loading strong { color: var(--text); }
.result-loading span { max-width: 270px; font-size: 12px; line-height: 1.5; }

.primary-result {
  display: grid;
  justify-items: start;
  gap: 3px;
  padding: 14px;
  border: 1px solid #285d7d;
  border-radius: 9px;
  background: linear-gradient(135deg, #16384d, #122332);
}
.primary-result > span:first-child { color: #9ac8e1; font-size: 12px; font-weight: 700; }
.primary-result strong { color: white; font-size: 31px; font-variant-numeric: tabular-nums; }
.primary-result strong small { font-size: 14px; font-weight: 500; color: #bcd3df; }
.primary-result > span:nth-child(3) { color: #c2d4de; font-size: 13px; }
.primary-result > small { margin-top: 3px; color: #8da7b6; }

.result-facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px 14px;
  margin: 14px 0 0;
  font-size: 12px;
}
.result-facts dt { color: var(--muted); }
.result-facts dd { margin: 0; color: #d8e1e8; text-align: right; font-variant-numeric: tabular-nums; }

.detail-grid { display: grid; gap: 8px; }
.detail-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 5px 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid #23303d;
  font-size: 12px;
}
.detail-item:last-child { border-bottom: 0; }
.detail-item span { color: var(--muted); }
.detail-item strong { font-variant-numeric: tabular-nums; }
.detail-item small { grid-column: 1 / -1; color: #718495; }
.muted { color: var(--muted); font-size: 12px; }

.table-wrap { overflow: auto; max-height: 330px; padding: 0; }
table { width: 100%; border-collapse: collapse; font-size: 11px; font-variant-numeric: tabular-nums; }
th,
td { padding: 8px 9px; border-bottom: 1px solid #23303d; text-align: right; white-space: nowrap; }
th { position: sticky; top: 0; z-index: 1; background: var(--surface-raised); color: #a9bac8; font-weight: 680; }
th:first-child,
td:first-child { text-align: left; }

.download-block {
  margin-top: 12px;
  padding: 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.download-block > label { display: block; margin-bottom: 8px; font-size: 12px; font-weight: 700; }
.download-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; }
.secondary-button { padding: 0 13px; background: var(--accent-soft); border-color: #2c6789; color: #dceef8; }
.secondary-button:hover { background: #1c4d6a; }

.workspace {
  display: grid;
  grid-template-rows: 52px minmax(0, 1fr);
  min-width: 0;
  min-height: 0;
  background: #090d12;
}

.workspace-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: #0e151d;
}

.metric-switch {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-soft);
}
.metric-switch button {
  min-width: 74px;
  height: 30px;
  padding: 0 12px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
  font-weight: 680;
}
.metric-switch button.active { background: var(--accent); color: white; }
.metric-switch button:disabled { opacity: .32; cursor: not-allowed; }

.toolbar-button {
  height: 32px;
  padding: 0 11px;
  border-color: var(--border);
  background: var(--surface);
  color: #b8c7d4;
  font-size: 11px;
}
.toolbar-button:hover { border-color: var(--border-bright); color: white; }

.visual-layout {
  position: relative;
  display: grid;
  grid-template-rows: minmax(120px, var(--top-height)) 6px minmax(42px, 1fr);
  min-width: 0;
  min-height: 0;
  padding: 8px;
  overflow: hidden;
}

.visual-layout.calculating::after {
  content: "Calculating…";
  position: absolute;
  z-index: 20;
  inset: 8px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(10, 15, 20, .82);
  color: #b8c8d6;
  font-size: 12px;
  letter-spacing: .04em;
}

.top-row {
  display: grid;
  grid-template-columns: minmax(42px, var(--hist-width)) 6px minmax(42px, 1fr);
  min-width: 0;
  min-height: 0;
}

.plot-panel {
  display: grid;
  grid-template-rows: 42px minmax(0, 1fr);
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-width: 0;
  padding: 0 8px 0 12px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-raised);
}
.panel-header > div:first-child { display: flex; gap: 8px; align-items: baseline; min-width: 0; }
.panel-header strong { font-size: 12px; }
.panel-header span { overflow: hidden; color: var(--muted); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }

.panel-actions { display: flex; gap: 4px; align-items: center; }
.panel-actions button,
.top-collapsed-bar button {
  display: grid;
  place-items: center;
  min-width: 27px;
  height: 27px;
  padding: 0 7px;
  border: 1px solid transparent;
  border-radius: 5px;
  background: transparent;
  color: #9eafbd;
  cursor: pointer;
  font-size: 13px;
}
.panel-actions button:hover:not(:disabled),
.top-collapsed-bar button:hover { border-color: var(--border); background: #202c38; color: white; }
.panel-actions button:disabled { opacity: .28; cursor: not-allowed; }
#svg-zoom-label { min-width: 48px; font-size: 10px; }

.panel-body { position: relative; min-width: 0; min-height: 0; overflow: hidden; }
.panel-body iframe { width: 100%; height: 100%; border: 0; background: transparent; }

.empty-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 7px;
  padding: 24px;
  color: #657889;
  text-align: center;
  pointer-events: none;
}
.empty-state strong { color: #8da1b1; font-size: 13px; }
.empty-state span { max-width: 320px; font-size: 11px; line-height: 1.5; }

.chart-body canvas { display: block; width: 100%; height: 100%; }

.svg-stage { background-image: radial-gradient(#26323d 1px, transparent 1px); background-size: 20px 20px; background-position: center; }
.svg-host { position: absolute; inset: 0; overflow: hidden; outline: none; cursor: grab; touch-action: none; user-select: none; }
.svg-host.dragging { cursor: grabbing; }
.svg-host svg { display: block; width: 100%; height: 100%; }

.splitter { position: relative; z-index: 5; }
.splitter::after { content: ""; position: absolute; border-radius: 999px; background: #31404d; opacity: .7; transition: background 100ms ease; }
.splitter:hover::after,
.splitter.dragging::after { background: var(--accent-bright); }
.splitter.vertical { cursor: col-resize; }
.splitter.vertical::after { top: 12%; bottom: 12%; left: 2px; width: 2px; }
.splitter.horizontal { cursor: row-resize; }
.splitter.horizontal::after { left: 12%; right: 12%; top: 2px; height: 2px; }

.top-collapsed-bar {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px 0 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-raised);
  color: var(--muted);
  font-size: 11px;
}

.visual-layout.top-collapsed { grid-template-rows: 42px 6px minmax(42px, 1fr); }
.visual-layout.top-collapsed .top-row { display: none; }
.visual-layout.top-collapsed .top-collapsed-bar { display: flex; }

.visual-layout.bottom-collapsed { grid-template-rows: minmax(120px, 1fr) 6px 42px; }
.visual-layout.bottom-collapsed .cartography-panel { grid-template-rows: 42px 0; }
.visual-layout.bottom-collapsed .cartography-panel .panel-body { display: none; }

.visual-layout.hist-collapsed .top-row { grid-template-columns: 42px 0 minmax(100px, 1fr); }
.visual-layout.interactive-collapsed .top-row { grid-template-columns: minmax(100px, 1fr) 0 42px; }
.visual-layout.hist-collapsed #vertical-splitter,
.visual-layout.interactive-collapsed #vertical-splitter { display: none; }
.visual-layout.hist-collapsed #histogram-panel,
.visual-layout.interactive-collapsed #interactive-panel { grid-template-rows: 1fr; }
.visual-layout.hist-collapsed #histogram-panel .panel-body,
.visual-layout.interactive-collapsed #interactive-panel .panel-body { display: none; }
.visual-layout.hist-collapsed #histogram-panel .panel-header,
.visual-layout.interactive-collapsed #interactive-panel .panel-header {
  display: grid;
  justify-items: center;
  align-content: space-between;
  gap: 8px;
  padding: 9px 0 6px;
  border: 0;
}
.visual-layout.hist-collapsed #histogram-panel .panel-header > div:first-child,
.visual-layout.interactive-collapsed #interactive-panel .panel-header > div:first-child { writing-mode: vertical-rl; align-items: center; }
.visual-layout.hist-collapsed #histogram-panel .panel-header span,
.visual-layout.interactive-collapsed #interactive-panel .panel-header span,
.visual-layout.hist-collapsed #histogram-panel .panel-actions button:not([data-collapse]),
.visual-layout.interactive-collapsed #interactive-panel .panel-actions button:not([data-collapse]) { display: none; }

.visual-layout.visuals-skipped { grid-template-rows: minmax(0, 1fr); }
.visual-layout.visuals-skipped .top-row { grid-template-columns: minmax(0, 1fr); }
.visual-layout.visuals-skipped #vertical-splitter,
.visual-layout.visuals-skipped #interactive-panel,
.visual-layout.visuals-skipped #horizontal-splitter,
.visual-layout.visuals-skipped #cartography-panel,
.visual-layout.visuals-skipped #top-collapsed-bar { display: none; }

@media (max-width: 940px) {
  body { overflow: auto; }
  .app-shell { grid-template-columns: 1fr; grid-template-rows: auto 720px; height: auto; min-height: 100%; overflow: visible; }
  .sidebar { height: auto; max-height: none; border-right: 0; border-bottom: 1px solid var(--border); }
  .workspace { min-height: 720px; }
}

@media (max-width: 560px) {
  .brand-header { grid-template-columns: 1fr 86px; }
  .field-grid.two,
  .field-grid.three { grid-template-columns: 1fr; }
  .metric-switch button { min-width: 62px; padding: 0 8px; }
  .workspace-toolbar { padding-inline: 7px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}