:root {
  --product-bg: #080d14;
  --product-surface: #111925;
  --product-surface-2: #182230;
  --product-border: #263548;
  --product-text: #f4f7fb;
  --product-muted: #98a8bd;
  --product-accent: #76a5ff;
  --product-good: #62c98b;
  --product-danger: #ff747d;
  --product-nav-width: 210px;
  --product-gap: clamp(12px, 1.4vw, 24px);
}

html {
  color-scheme: dark;
  background: var(--product-bg);
  overflow-x: hidden;
}

body {
  position: relative;
  isolation: isolate;
  min-width: 280px;
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(90deg, rgba(118, 165, 255, 0.04) 1px, transparent 1px) 0 0 / 72px 72px,
    linear-gradient(rgba(98, 201, 139, 0.035) 1px, transparent 1px) 0 0 / 72px 72px,
    radial-gradient(circle at 50% -20%, rgba(70, 103, 157, 0.18), transparent 42%),
    var(--product-bg);
  color: var(--product-text);
  animation: productAmbientGrid 26s linear infinite;
}

body::before,
body::after {
  content: "";
  position: fixed;
  pointer-events: none;
  z-index: 0;
}

body::before {
  inset: 0;
  opacity: 0.58;
  background-image:
    linear-gradient(118deg, transparent 0 43%, rgba(118, 165, 255, 0.12) 43.2% 43.48%, transparent 43.8% 100%),
    linear-gradient(64deg, transparent 0 61%, rgba(98, 201, 139, 0.11) 61.15% 61.42%, transparent 61.75% 100%),
    conic-gradient(from 45deg at 50% 50%, rgba(255, 255, 255, 0.028) 0 25%, rgba(118, 165, 255, 0.035) 0 50%, transparent 0 75%, rgba(241, 201, 106, 0.03) 0 100%);
  background-position:
    -16vw 10vh,
    56vw 18vh,
    0 0;
  background-size:
    720px 440px,
    620px 480px,
    144px 144px;
  mask-image: linear-gradient(to bottom, transparent 0, #000 12%, #000 88%, transparent 100%);
  animation: productBoardTrace 31s linear infinite;
}

body::after {
  inset: -8%;
  opacity: 0.42;
  background-image:
    linear-gradient(126deg, transparent 0 46%, rgba(241, 201, 106, 0.12) 46.1% 46.4%, transparent 46.75% 100%),
    linear-gradient(38deg, transparent 0 56%, rgba(118, 165, 255, 0.13) 56.12% 56.38%, transparent 56.72% 100%),
    repeating-linear-gradient(126deg, transparent 0 96px, rgba(255, 255, 255, 0.036) 97px 98px, transparent 99px 210px);
  background-position:
    12vw 12vh,
    46vw 52vh,
    0 0;
  background-size:
    760px 500px,
    680px 430px,
    540px 540px;
  mix-blend-mode: screen;
  animation: productSignalDrift 18s ease-in-out infinite alternate;
}

* {
  box-sizing: border-box;
}

button,
input,
select,
textarea {
  min-width: 0;
  font: inherit;
}

img,
canvas,
svg {
  max-width: 100%;
}

.topbar {
  width: 100%;
  max-width: none;
  min-height: 72px;
  margin: 0;
  padding: 12px clamp(14px, 2.2vw, 34px);
  border: 0;
  border-bottom: 1px solid var(--product-border);
  border-radius: 0;
  background: rgba(8, 13, 20, 0.92);
  backdrop-filter: blur(18px);
  position: sticky;
  top: 0;
  z-index: 80;
}

.app-shell {
  position: relative;
  z-index: 1;
}

.product-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  max-width: 1920px;
  margin: 0 auto;
}

.product-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.product-mark {
  display: grid;
  width: 42px;
  aspect-ratio: 1;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 8px;
  background: var(--product-accent);
  color: #07101d;
  font-size: 22px;
  font-weight: 800;
}

.product-brand-copy {
  min-width: 0;
}

.product-brand-copy strong {
  display: block;
  font-size: clamp(18px, 1.6vw, 24px);
  line-height: 1.1;
  letter-spacing: 0;
}

.product-brand-copy span {
  display: block;
  margin-top: 3px;
  color: var(--product-muted);
  font-size: 12px;
  line-height: 1.25;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.product-header-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(74px, 1fr));
  gap: 8px;
}

.product-header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  min-width: 0;
}

.product-home-button {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 0 15px;
  border: 1px solid color-mix(in srgb, var(--product-accent), var(--product-border) 38%);
  border-radius: 7px;
  color: var(--product-text);
  background: linear-gradient(180deg, rgba(118, 165, 255, 0.18), rgba(17, 25, 37, 0.92));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 12px 28px rgba(0, 0, 0, 0.18);
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
  isolation: isolate;
  transition:
    border-color 0.16s ease,
    box-shadow 0.16s ease,
    transform 0.16s ease,
    background 0.16s ease;
  animation: productHomeFloat 3.2s ease-in-out infinite;
}

.product-home-button::before {
  content: "";
  position: absolute;
  inset: -70% -45%;
  z-index: -1;
  background: linear-gradient(110deg, transparent 35%, rgba(255, 255, 255, 0.22) 48%, transparent 62%);
  transform: translateX(-70%);
  animation: productHomeSweep 4.8s ease-in-out infinite;
}

.product-home-button__spark {
  width: 8px;
  aspect-ratio: 1;
  border-radius: 999px;
  background: var(--product-accent);
  box-shadow: 0 0 0 4px rgba(118, 165, 255, 0.12);
  animation: productHomePulse 1.9s ease-in-out infinite;
}

.product-home-button:hover,
.product-home-button:focus-visible {
  transform: translateY(-2px);
  border-color: var(--product-accent);
  color: #ffffff;
  background: linear-gradient(180deg, rgba(118, 165, 255, 0.28), rgba(17, 25, 37, 0.96));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.12),
    0 16px 36px rgba(58, 101, 184, 0.2);
}

.product-home-button:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--product-accent), #ffffff 20%);
  outline-offset: 3px;
}

.product-header-stat {
  min-width: 86px;
  padding: 8px 12px;
  border: 1px solid var(--product-border);
  border-radius: 7px;
  background: var(--product-surface);
}

.product-header-stat span,
.product-header-stat strong {
  display: block;
}

.product-header-stat span {
  color: var(--product-muted);
  font-size: 10px;
  line-height: 1.2;
  text-transform: uppercase;
}

.product-header-stat strong {
  margin-top: 3px;
  font-size: 17px;
  line-height: 1;
}

.app-shell {
  display: grid;
  grid-template-columns: var(--product-nav-width) minmax(0, 1fr);
  align-items: start;
  width: min(100%, 1920px);
  max-width: none;
  min-height: calc(100svh - 72px);
  margin: 0 auto;
  padding: 0;
}

.workspace-tabs {
  position: sticky;
  top: 72px;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
  width: 100%;
  height: calc(100svh - 72px);
  margin: 0;
  padding: 18px 12px;
  overflow: auto;
  border: 0;
  border-right: 1px solid var(--product-border);
  border-radius: 0;
  background: rgba(10, 16, 25, 0.92);
  scrollbar-width: thin;
}

.workspace-tab {
  width: 100%;
  min-height: 46px;
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: 7px;
  color: var(--product-muted);
  background: transparent;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-align: left;
  white-space: normal;
}

.workspace-tab:hover {
  color: var(--product-text);
  background: rgba(118, 165, 255, 0.08);
}

.workspace-tab.active {
  border-color: rgba(118, 165, 255, 0.38);
  color: #fff;
  background: rgba(118, 165, 255, 0.17);
  box-shadow: inset 3px 0 0 var(--product-accent);
}

.move-tree-node summary,
.move-tree-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.move-tree-node summary > *,
.move-tree-row > * {
  min-width: 0;
}

.study-section-header {
  flex-wrap: wrap;
}

.study-section-header .line-badge {
  max-width: 100%;
  white-space: normal;
  overflow-wrap: anywhere;
}

.workspace-panel {
  grid-column: 2;
  width: 100%;
  min-width: 0;
  max-width: none;
  padding: var(--product-gap);
}

.workspace-panel.active {
  display: block;
  animation: product-panel-in 180ms ease-out;
}

.workspace-panel > *,
.section-block,
.card,
.setup-layout > *,
.split-grid > *,
.progress-dashboard-grid > *,
.smart-theory-grid > * {
  min-width: 0;
}

.card,
.section-block,
.smart-theory-workspace {
  border-color: var(--product-border);
  border-radius: 8px;
}

.section-title,
.card h2,
.card h3 {
  overflow-wrap: anywhere;
}

.setup-layout,
.split-grid,
.progress-dashboard-grid,
.progress-dashboard-grid.lower,
.progress-session-layout {
  gap: var(--product-gap);
}

.form-grid,
.engine-grid,
.two-up {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 210px), 1fr));
}

.summary-grid,
.progress-metric-grid,
.hero-stats {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 140px), 1fr));
}

.progress-dashboard-grid {
  grid-template-columns: minmax(0, 1.6fr) minmax(260px, 0.72fr);
}

.progress-dashboard-grid.lower {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.progress-chart-card canvas,
.progress-chart-shell canvas {
  width: 100% !important;
  max-width: 100%;
  min-height: 190px;
}

.smart-theory-workspace {
  container-type: inline-size;
}

.smart-theory-grid {
  grid-template-columns: minmax(220px, 0.68fr) minmax(360px, 1.45fr) minmax(270px, 0.9fr);
  min-height: min(720px, calc(100svh - 220px));
}

.smart-theory-stage,
.smart-theory-rail {
  min-width: 0;
  overflow: auto;
}

.smart-board-shell {
  width: min(100%, calc(100svh - 310px));
  max-width: 760px;
  min-width: 0;
  margin-inline: auto;
}

.smart-theory-mini-board,
.mini-board,
.training-board,
.trainer-board,
#trainerBoard {
  width: min(100%, var(--bookup-board-size, 720px));
  max-width: 100%;
  aspect-ratio: 1;
  margin-inline: auto;
}

.board-wrap {
  width: min(100%, calc(var(--bookup-board-size, 640px) + 18px));
  grid-template-columns: 18px minmax(0, 1fr);
  grid-template-rows: auto 18px;
}

.board-grid {
  width: 100%;
  max-width: none;
  height: auto;
  aspect-ratio: 1;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  grid-template-rows: repeat(8, minmax(0, 1fr));
}

.board-arrows {
  grid-column: 1 / -1;
  left: 18px;
  width: calc(100% - 18px);
  max-width: none;
  height: auto;
  aspect-ratio: 1;
}

.file-labels {
  width: 100%;
}

.smart-move-path.empty {
  overflow-x: hidden;
  white-space: normal;
}

.smart-command-bar {
  position: sticky;
  bottom: 0;
  z-index: 30;
  gap: 10px;
  background: rgba(9, 15, 23, 0.96);
  backdrop-filter: blur(16px);
}

.smart-primary-actions,
.smart-secondary-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.smart-primary-actions > *,
.smart-secondary-actions > * {
  flex: 0 1 auto;
}

table {
  width: 100%;
}

.projection-table-wrap,
.smart-tree-rail,
.stack,
.rating-chart,
.chart-shell {
  max-width: 100%;
  overflow-x: auto;
}

.product-repertoire-tree {
  margin-block: var(--product-gap);
}

@container (max-width: 1040px) {
  .smart-theory-grid {
    grid-template-columns: minmax(210px, 0.68fr) minmax(0, 1.32fr);
  }

  .smart-tree-rail {
    grid-column: 1 / -1;
    max-height: 560px;
    border-left: 0;
    border-top: 1px solid var(--product-border);
  }
}

@media (max-width: 1180px) {
  .app-shell {
    display: block;
  }

  .workspace-tabs {
    top: 72px;
    flex-direction: row;
    height: auto;
    padding: 8px clamp(10px, 2vw, 20px);
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--product-border);
    scrollbar-width: none;
  }

  .workspace-tabs::-webkit-scrollbar {
    display: none;
  }

  .workspace-tab {
    width: auto;
    min-width: max-content;
    min-height: 42px;
    text-align: center;
  }

  .workspace-tab.active {
    box-shadow: inset 0 -3px 0 var(--product-accent);
  }

  .workspace-panel {
    padding: clamp(12px, 2.4vw, 24px);
  }
}

@media (max-width: 900px) {
  .product-header {
    grid-template-columns: 1fr;
  }

  .product-header-stats {
    display: none;
  }

  .product-header-actions {
    justify-content: flex-start;
  }

  .progress-dashboard-grid,
  .progress-dashboard-grid.lower,
  .setup-layout,
  .split-grid,
  .progress-session-layout {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  .smart-theory-grid {
    display: flex;
    flex-direction: column;
    min-height: 0;
  }

  .smart-theory-stage {
    order: 1;
  }

  .smart-source-rail {
    order: 2;
  }

  .smart-tree-rail {
    order: 3;
  }

  .smart-theory-rail {
    max-height: none;
    border: 0;
    border-bottom: 1px solid var(--product-border);
  }

  .smart-selected-strip,
  .smart-tree-toolbar {
    grid-template-columns: 1fr;
  }

  .study-board-shell,
  .eval-rail,
  .board-area {
    min-width: 0;
    max-width: 100%;
  }

  .eval-rail .eval-bar {
    width: auto;
    min-width: 0;
    flex: 1 1 auto;
  }

  .eval-rail .eval-caption {
    flex: 0 1 auto;
    max-width: 18ch;
    overflow-wrap: anywhere;
  }
}

@keyframes productHomeFloat {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-1px);
  }
}

@keyframes productHomeSweep {
  0%,
  42% {
    transform: translateX(-72%);
    opacity: 0;
  }
  52% {
    opacity: 1;
  }
  68%,
  100% {
    transform: translateX(72%);
    opacity: 0;
  }
}

@keyframes productHomePulse {
  0%,
  100% {
    transform: scale(0.88);
    box-shadow: 0 0 0 4px rgba(118, 165, 255, 0.12);
  }
  50% {
    transform: scale(1.05);
    box-shadow: 0 0 0 7px rgba(118, 165, 255, 0.06);
  }
}

@keyframes productAmbientGrid {
  from {
    background-position:
      0 0,
      0 0,
      center,
      center;
  }
  to {
    background-position:
      72px 36px,
      -36px 72px,
      center,
      center;
  }
}

@keyframes productBoardTrace {
  from {
    background-position:
      -16vw 10vh,
      56vw 18vh,
      0 0;
  }
  to {
    background-position:
      14vw 16vh,
      34vw 10vh,
      144px 144px;
  }
}

@keyframes productSignalDrift {
  0% {
    opacity: 0.3;
    transform: translate3d(-1.6%, -0.8%, 0);
    background-position:
      12vw 12vh,
      46vw 52vh,
      0 0;
  }
  55% {
    opacity: 0.52;
    transform: translate3d(1.2%, 0.7%, 0);
  }
  100% {
    opacity: 0.38;
    transform: translate3d(2%, 1.2%, 0);
    background-position:
      28vw 8vh,
      36vw 46vh,
      180px -120px;
  }
}

@media (max-width: 620px) {
  :root {
    --product-gap: 10px;
  }

  body {
    padding-bottom: 68px;
  }

  .topbar {
    position: relative;
    min-height: 62px;
    padding: 10px 14px;
  }

  .product-mark {
    width: 38px;
    border-radius: 7px;
  }

  .product-brand-copy span {
    max-width: 68vw;
  }

  .workspace-tabs {
    position: fixed;
    inset: auto 0 0;
    z-index: 100;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 2px;
    padding: 6px max(6px, env(safe-area-inset-right)) calc(6px + env(safe-area-inset-bottom)) max(6px, env(safe-area-inset-left));
    border-top: 1px solid var(--product-border);
    border-bottom: 0;
    background: rgba(8, 13, 20, 0.98);
  }

  .workspace-tab {
    min-width: 0;
    min-height: 52px;
    padding: 4px 2px;
    border: 0;
    font-size: clamp(9px, 2.7vw, 12px);
    line-height: 1.1;
    text-align: center;
  }

  .workspace-tab.active {
    box-shadow: inset 0 3px 0 var(--product-accent);
  }

  .workspace-panel {
    padding: 10px;
  }

  .card,
  .section-block,
  .smart-theory-workspace {
    border-radius: 6px;
  }

  .section-title {
    font-size: clamp(22px, 7vw, 30px);
  }

  .setup-actions,
  .chip-row,
  .trainer-actions,
  .smart-primary-actions,
  .smart-secondary-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .setup-actions > *,
  .chip-row > *,
  .trainer-actions > *,
  .smart-primary-actions > *,
  .smart-secondary-actions > * {
    width: 100%;
    min-width: 0;
    white-space: normal;
  }

  .smart-command-bar {
    position: static;
  }

  .smart-board-shell {
    width: 100%;
  }
}

@media (max-width: 360px) {
  .product-brand-copy span {
    display: none;
  }

  .setup-actions,
  .chip-row,
  .trainer-actions,
  .smart-primary-actions,
  .smart-secondary-actions {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 2200px) {
  :root {
    --product-nav-width: 240px;
  }

  .app-shell,
  .product-header {
    max-width: 2160px;
  }

  .workspace-panel {
    padding: 30px;
  }
}

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

@keyframes product-panel-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Bookup study studio
   This high-specificity layer is shared by the desktop and hosted editions so the
   same Bookup study layout follows every product surface.
   ========================================================================== */

:root[data-bookup-ui="unified-product-v9"] {
  color-scheme: dark;
  --studio-bg: #080e16;
  --studio-bg-soft: #0c1420;
  --studio-panel: #141f2d;
  --studio-panel-raised: #1a2838;
  --studio-panel-inset: #0d1622;
  --studio-border: #35485f;
  --studio-border-strong: #526b88;
  --studio-text: #f7faff;
  --studio-muted: #bac6d7;
  --studio-dim: #91a2b9;
  --studio-blue: #7bb4ff;
  --studio-blue-strong: #4c92f2;
  --studio-green: #5bd99e;
  --studio-amber: #ffca70;
  --studio-red: #ff858e;
  --studio-focus: #ffe17c;
  --studio-shadow: 0 14px 34px rgba(0, 0, 0, 0.24);
  --studio-radius: 10px;
  --product-bg: var(--studio-bg);
  --product-surface: var(--studio-panel);
  --product-surface-2: var(--studio-panel-raised);
  --product-border: var(--studio-border);
  --product-text: var(--studio-text);
  --product-muted: var(--studio-muted);
  --product-accent: var(--studio-blue);
  --product-good: var(--studio-green);
  --product-danger: var(--studio-red);
  --product-nav-width: 180px;
  --product-gap: clamp(12px, 1.2vw, 18px);
  --bg: var(--studio-bg);
  --bg2: var(--studio-bg-soft);
  --panel: var(--studio-panel);
  --panel-2: var(--studio-panel-inset);
  --border: var(--studio-border);
  --border-strong: var(--studio-border-strong);
  --text: #e7edf6;
  --text-strong: var(--studio-text);
  --muted: var(--studio-muted);
  --accent: var(--studio-blue);
  --accent-2: var(--studio-amber);
  --success: var(--studio-green);
  --danger: var(--studio-red);
  --radius: var(--studio-radius);
  --body: "Segoe UI Variable Text", "Segoe UI", Inter, system-ui, sans-serif;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

:root[data-bookup-ui="unified-product-v9"] body {
  min-width: 300px;
  color: #e7edf6;
  background:
    linear-gradient(rgba(123, 180, 255, 0.025) 1px, transparent 1px) 0 0 / 48px 48px,
    linear-gradient(90deg, rgba(123, 180, 255, 0.025) 1px, transparent 1px) 0 0 / 48px 48px,
    radial-gradient(circle at 68% -10%, rgba(76, 146, 242, 0.16), transparent 34rem),
    var(--studio-bg);
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.5;
  animation: none;
}

:root[data-bookup-ui="unified-product-v9"] body::before {
  inset: 60px auto auto 180px;
  width: min(46vw, 720px);
  height: min(46vw, 720px);
  opacity: 0.13;
  background:
    conic-gradient(
      from 90deg,
      rgba(123, 180, 255, 0.13) 0 25%,
      transparent 0 50%,
      rgba(123, 180, 255, 0.13) 0 75%,
      transparent 0
    ) 0 0 / 96px 96px;
  mask-image: radial-gradient(circle at top left, #000, transparent 72%);
  animation: none;
}

:root[data-bookup-ui="unified-product-v9"] body::after {
  display: none;
  animation: none;
}

:root[data-bookup-ui="unified-product-v9"] *,
:root[data-bookup-ui="unified-product-v9"] *::before,
:root[data-bookup-ui="unified-product-v9"] *::after {
  box-sizing: border-box;
}

:root[data-bookup-ui="unified-product-v9"] img,
:root[data-bookup-ui="unified-product-v9"] canvas,
:root[data-bookup-ui="unified-product-v9"] svg {
  max-width: 100%;
}

:root[data-bookup-ui="unified-product-v9"] [hidden] {
  display: none !important;
}

/* Compact command header */
:root[data-bookup-ui="unified-product-v9"] .topbar {
  min-height: 60px;
  padding: 8px clamp(12px, 1.5vw, 22px);
  border-bottom: 1px solid var(--studio-border);
  background: rgba(8, 14, 22, 0.96);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 100;
}

:root[data-bookup-ui="unified-product-v9"] .product-header {
  max-width: 1920px;
  min-height: 43px;
  gap: 14px;
}

:root[data-bookup-ui="unified-product-v9"] .product-brand {
  gap: 10px;
}

:root[data-bookup-ui="unified-product-v9"] .product-mark {
  width: 38px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 9px;
  color: #06101c;
  background: linear-gradient(145deg, #a4ceff, #5d9ef4);
  box-shadow: 0 8px 18px rgba(76, 146, 242, 0.22);
  font-size: 20px;
}

:root[data-bookup-ui="unified-product-v9"] .product-brand-copy strong {
  color: var(--studio-text);
  font-size: 20px;
  letter-spacing: -0.02em;
}

:root[data-bookup-ui="unified-product-v9"] .product-brand-copy span {
  margin-top: 1px;
  color: var(--studio-muted);
  font-size: 11px;
}

:root[data-bookup-ui="unified-product-v9"] .product-header-actions {
  gap: 8px;
}

:root[data-bookup-ui="unified-product-v9"] .product-header-stats {
  grid-template-columns: repeat(3, minmax(68px, 78px));
  gap: 6px;
}

:root[data-bookup-ui="unified-product-v9"] .product-header-stat {
  min-width: 0;
  padding: 6px 9px;
  border-color: var(--studio-border);
  border-radius: 8px;
  background: var(--studio-bg-soft);
}

:root[data-bookup-ui="unified-product-v9"] .product-header-stat span {
  color: var(--studio-dim);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

:root[data-bookup-ui="unified-product-v9"] .product-header-stat strong {
  margin-top: 2px;
  color: var(--studio-text);
  font-size: 16px;
}

:root[data-bookup-ui="unified-product-v9"] .product-home-button {
  min-height: 38px;
  padding: 0 13px;
  border-color: var(--studio-border-strong);
  border-radius: 8px;
  color: var(--studio-text);
  background: var(--studio-panel);
  box-shadow: none;
  animation: none;
}

:root[data-bookup-ui="unified-product-v9"] .product-home-button::before,
:root[data-bookup-ui="unified-product-v9"] .product-home-button__spark {
  animation: none;
}

:root[data-bookup-ui="unified-product-v9"] .product-home-button__spark {
  background: var(--studio-green);
  box-shadow: 0 0 0 4px rgba(91, 217, 158, 0.12);
}

:root[data-bookup-ui="unified-product-v9"] .product-home-button:hover {
  transform: none;
  border-color: var(--studio-blue);
  background: var(--studio-panel-raised);
  box-shadow: none;
}

/* Workspace frame and navigation */
:root[data-bookup-ui="unified-product-v9"] .app-shell {
  display: grid;
  grid-template-columns: var(--product-nav-width) minmax(0, 1fr);
  align-items: start;
  width: min(100%, 1920px);
  min-height: calc(100svh - 60px);
  margin: 0 auto;
  padding: 0;
}

:root[data-bookup-ui="unified-product-v9"] .workspace-tabs {
  position: sticky;
  top: 60px;
  z-index: 60;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 5px;
  width: 100%;
  height: calc(100svh - 60px);
  margin: 0;
  padding: 14px 10px;
  overflow: auto;
  border: 0;
  border-right: 1px solid var(--studio-border);
  border-radius: 0;
  background: rgba(9, 16, 25, 0.96);
  scrollbar-width: thin;
}

:root[data-bookup-ui="unified-product-v9"] .workspace-tab {
  width: 100%;
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--studio-muted);
  background: transparent;
  font-family: var(--body);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.01em;
  text-align: left;
  text-transform: none;
  white-space: normal;
}

:root[data-bookup-ui="unified-product-v9"] .workspace-tab:hover {
  color: var(--studio-text);
  background: rgba(123, 180, 255, 0.09);
}

:root[data-bookup-ui="unified-product-v9"] .workspace-tab.active,
:root[data-bookup-ui="unified-product-v9"] .workspace-tab[aria-selected="true"] {
  border-color: rgba(123, 180, 255, 0.58);
  color: #ffffff;
  background: linear-gradient(90deg, rgba(76, 146, 242, 0.28), rgba(76, 146, 242, 0.1));
  box-shadow: inset 3px 0 0 var(--studio-blue);
}

:root[data-bookup-ui="unified-product-v9"] .workspace-panel {
  grid-column: 2;
  width: 100%;
  min-width: 0;
  max-width: none;
  padding: var(--product-gap);
}

:root[data-bookup-ui="unified-product-v9"] #workspaceNotice {
  position: fixed;
  top: 72px;
  right: 14px;
  z-index: 150;
  width: min(420px, calc(100vw - 28px));
  min-height: 0;
  padding: 10px 14px;
  border: 1px solid var(--studio-border-strong);
  border-radius: 8px;
  background: rgba(13, 23, 35, 0.97);
  box-shadow: var(--studio-shadow);
}

:root[data-bookup-ui="unified-product-v9"] .workspace-panel[hidden] {
  display: none !important;
}

:root[data-bookup-ui="unified-product-v9"] .workspace-panel.active {
  display: block;
  animation: studio-panel-in 140ms ease-out;
  contain: layout style;
}

:root[data-bookup-ui="unified-product-v9"] .workspace-panel.active > .section-block,
:root[data-bookup-ui="unified-product-v9"] .workspace-panel.active > .setup-live-analysis-shell,
:root[data-bookup-ui="unified-product-v9"] .workspace-panel.active .progress-dashboard-grid,
:root[data-bookup-ui="unified-product-v9"] .workspace-panel.active .progress-session-layout {
  content-visibility: visible;
  contain-intrinsic-size: none;
}

@keyframes studio-panel-in {
  from { opacity: 0; transform: translateY(3px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Typography and surfaces */
:root[data-bookup-ui="unified-product-v9"] h1,
:root[data-bookup-ui="unified-product-v9"] h2,
:root[data-bookup-ui="unified-product-v9"] h3,
:root[data-bookup-ui="unified-product-v9"] h4 {
  color: var(--studio-text);
  text-wrap: balance;
}

:root[data-bookup-ui="unified-product-v9"] .section-title {
  margin: 0;
  color: var(--studio-text);
  font-size: clamp(20px, 1.8vw, 28px);
  line-height: 1.16;
  letter-spacing: -0.025em;
  overflow-wrap: anywhere;
}

:root[data-bookup-ui="unified-product-v9"] .section-label {
  margin-bottom: 7px;
  color: var(--studio-blue);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

:root[data-bookup-ui="unified-product-v9"] .summary-copy,
:root[data-bookup-ui="unified-product-v9"] .line-note,
:root[data-bookup-ui="unified-product-v9"] .status {
  color: var(--studio-muted);
  line-height: 1.55;
}

:root[data-bookup-ui="unified-product-v9"] .card,
:root[data-bookup-ui="unified-product-v9"] .section-block,
:root[data-bookup-ui="unified-product-v9"] .smart-theory-workspace {
  min-width: 0;
  margin: 0;
  padding: 16px;
  border: 1px solid var(--studio-border);
  border-radius: var(--studio-radius);
  color: #e7edf6;
  background: var(--studio-panel);
  box-shadow: var(--studio-shadow);
}

:root[data-bookup-ui="unified-product-v9"] .section-block {
  background: rgba(20, 31, 45, 0.95);
}

:root[data-bookup-ui="unified-product-v9"] .card h2,
:root[data-bookup-ui="unified-product-v9"] .card h3,
:root[data-bookup-ui="unified-product-v9"] .card h4 {
  margin: 0;
}

:root[data-bookup-ui="unified-product-v9"] .stack {
  gap: 9px;
}

:root[data-bookup-ui="unified-product-v9"] .stack.empty,
:root[data-bookup-ui="unified-product-v9"] .health-dashboard.empty,
:root[data-bookup-ui="unified-product-v9"] .move-tree.empty,
:root[data-bookup-ui="unified-product-v9"] .theory-output.empty,
:root[data-bookup-ui="unified-product-v9"] .realign-output.empty,
:root[data-bookup-ui="unified-product-v9"] .preview-panel.empty,
:root[data-bookup-ui="unified-product-v9"] .compact-empty {
  min-height: 0;
  padding: 12px 14px;
  border: 1px dashed var(--studio-border-strong);
  border-radius: 8px;
  color: var(--studio-muted);
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] .line-card,
:root[data-bookup-ui="unified-product-v9"] .opening-family-card,
:root[data-bookup-ui="unified-product-v9"] .mistake-card,
:root[data-bookup-ui="unified-product-v9"] .suggestion-card,
:root[data-bookup-ui="unified-product-v9"] .queue-card,
:root[data-bookup-ui="unified-product-v9"] .review-card {
  padding: 12px 14px;
  border: 1px solid var(--studio-border);
  border-radius: 8px;
  color: #e7edf6;
  background: var(--studio-panel-inset);
  box-shadow: none;
}

:root[data-bookup-ui="unified-product-v9"] .line-card-header,
:root[data-bookup-ui="unified-product-v9"] .opening-family-header,
:root[data-bookup-ui="unified-product-v9"] .mistake-header,
:root[data-bookup-ui="unified-product-v9"] .queue-card-header {
  gap: 10px;
  align-items: center;
}

:root[data-bookup-ui="unified-product-v9"] .line-card-header strong,
:root[data-bookup-ui="unified-product-v9"] .line-title,
:root[data-bookup-ui="unified-product-v9"] .queue-title {
  color: var(--studio-text);
  font-size: 15px;
  line-height: 1.3;
}

:root[data-bookup-ui="unified-product-v9"] .line-badge,
:root[data-bookup-ui="unified-product-v9"] .lesson-chip,
:root[data-bookup-ui="unified-product-v9"] .tree-meta {
  border-color: var(--studio-border);
  color: var(--studio-muted);
  background: var(--studio-bg-soft);
}

/* Inputs, commands, state, and focus */
:root[data-bookup-ui="unified-product-v9"] button,
:root[data-bookup-ui="unified-product-v9"] input,
:root[data-bookup-ui="unified-product-v9"] select,
:root[data-bookup-ui="unified-product-v9"] textarea {
  min-width: 0;
  font: inherit;
}

:root[data-bookup-ui="unified-product-v9"] input,
:root[data-bookup-ui="unified-product-v9"] select,
:root[data-bookup-ui="unified-product-v9"] textarea {
  width: 100%;
  min-height: 42px;
  padding: 9px 11px;
  border: 1px solid var(--studio-border-strong);
  border-radius: 8px;
  color: var(--studio-text);
  background: #09121d;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.025);
}

:root[data-bookup-ui="unified-product-v9"] textarea {
  min-height: 96px;
  resize: vertical;
}

:root[data-bookup-ui="unified-product-v9"] input::placeholder,
:root[data-bookup-ui="unified-product-v9"] textarea::placeholder {
  color: #8193aa;
  opacity: 1;
}

:root[data-bookup-ui="unified-product-v9"] .field {
  display: grid;
  align-content: start;
  gap: 5px;
  min-width: 0;
}

:root[data-bookup-ui="unified-product-v9"] .field > span,
:root[data-bookup-ui="unified-product-v9"] .field > label > span {
  margin: 0;
  color: var(--studio-muted);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

:root[data-bookup-ui="unified-product-v9"] .checkbox-row {
  min-height: 42px;
  padding: 8px 10px;
  border: 1px solid var(--studio-border);
  border-radius: 8px;
  color: #e7edf6;
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] .checkbox-row input {
  width: 17px;
  min-height: 17px;
  accent-color: var(--studio-blue);
}

:root[data-bookup-ui="unified-product-v9"] .checkbox-row span {
  color: #e7edf6;
  font-size: 13px;
}

:root[data-bookup-ui="unified-product-v9"] .primary-btn,
:root[data-bookup-ui="unified-product-v9"] .launch-btn,
:root[data-bookup-ui="unified-product-v9"] .ghost-btn,
:root[data-bookup-ui="unified-product-v9"] label.ghost-btn {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 8px 13px;
  border: 1px solid var(--studio-border-strong);
  border-radius: 8px;
  font-family: var(--body);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-align: center;
  text-transform: none;
  white-space: normal;
  cursor: pointer;
}

:root[data-bookup-ui="unified-product-v9"] .primary-btn {
  border-color: #70dfa9;
  color: #05140d;
  background: linear-gradient(180deg, #73e4b1, #4fc98f);
  box-shadow: 0 8px 18px rgba(41, 176, 116, 0.18);
}

:root[data-bookup-ui="unified-product-v9"] .launch-btn {
  border-color: #84baff;
  color: #07111d;
  background: linear-gradient(180deg, #91c1ff, #67a8fb);
  box-shadow: 0 8px 18px rgba(76, 146, 242, 0.16);
}

:root[data-bookup-ui="unified-product-v9"] .ghost-btn,
:root[data-bookup-ui="unified-product-v9"] label.ghost-btn {
  color: var(--studio-text);
  background: var(--studio-bg-soft);
  box-shadow: none;
}

:root[data-bookup-ui="unified-product-v9"] .primary-btn:hover,
:root[data-bookup-ui="unified-product-v9"] .launch-btn:hover {
  filter: brightness(1.07);
}

:root[data-bookup-ui="unified-product-v9"] .ghost-btn:hover,
:root[data-bookup-ui="unified-product-v9"] label.ghost-btn:hover {
  border-color: var(--studio-blue);
  background: var(--studio-panel-raised);
}

:root[data-bookup-ui="unified-product-v9"] .stop-import-btn,
:root[data-bookup-ui="unified-product-v9"] #resetWorkspaceBtn {
  border-color: rgba(255, 133, 142, 0.62);
  color: #ffc1c6;
  background: rgba(89, 24, 31, 0.26);
}

:root[data-bookup-ui="unified-product-v9"] #reclassifyFreshBtn {
  border-color: rgba(255, 202, 112, 0.62);
  color: #ffe0aa;
  background: rgba(92, 62, 18, 0.25);
  box-shadow: none;
}

:root[data-bookup-ui="unified-product-v9"] :is(
  a,
  button,
  input,
  select,
  textarea,
  summary,
  [tabindex]
):focus-visible {
  outline: 3px solid var(--studio-focus);
  outline-offset: 2px;
  box-shadow: 0 0 0 5px rgba(8, 14, 22, 0.86);
}

:root[data-bookup-ui="unified-product-v9"] .square:focus-visible {
  z-index: 8;
  outline: 0;
  box-shadow:
    inset 0 0 0 4px var(--studio-focus),
    inset 0 0 0 6px rgba(8, 14, 22, 0.72);
}

:root[data-bookup-ui="unified-product-v9"] .status {
  min-height: 0;
}

:root[data-bookup-ui="unified-product-v9"] .status[data-tone="success"] {
  color: #9af0c3;
}

:root[data-bookup-ui="unified-product-v9"] .status[data-tone="error"] {
  color: #ffb2b8;
}

:root[data-bookup-ui="unified-product-v9"] .progress-track {
  height: 7px;
  border: 1px solid rgba(123, 180, 255, 0.16);
  border-radius: 999px;
  background: #07101a;
}

:root[data-bookup-ui="unified-product-v9"] .progress-fill {
  background: linear-gradient(90deg, var(--studio-blue-strong), var(--studio-green));
}

:root[data-bookup-ui="unified-product-v9"] body.is-loading .progress-fill {
  animation: progress-pulse 900ms ease-in-out infinite alternate;
}

/* Setup cockpit */
:root[data-bookup-ui="unified-product-v9"] [data-tab-panel="setup"].active {
  display: block;
}

:root[data-bookup-ui="unified-product-v9"] .setup-layout {
  display: grid;
  grid-template-columns: minmax(620px, 1.3fr) minmax(330px, 0.7fr);
  gap: var(--product-gap);
  align-items: start;
}

:root[data-bookup-ui="unified-product-v9"] .setup-card {
  display: grid;
  gap: 13px;
}

:root[data-bookup-ui="unified-product-v9"] .setup-card > .section-title {
  max-width: 34ch;
  font-size: clamp(21px, 1.7vw, 27px);
}

:root[data-bookup-ui="unified-product-v9"] .setup-card .form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(150px, 1fr));
  gap: 10px;
}

:root[data-bookup-ui="unified-product-v9"] .setup-card .field:has([data-time-class-toggle]) {
  grid-column: span 2;
}

:root[data-bookup-ui="unified-product-v9"] .setup-card .field:has([data-time-class-toggle]) .progress-mode-tabs {
  width: 100%;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

:root[data-bookup-ui="unified-product-v9"] .setup-card .field:has([data-time-class-toggle]) .progress-mode-btn {
  min-width: 0;
  padding-inline: 5px;
}

:root[data-bookup-ui="unified-product-v9"] [data-time-class-toggle="rapid"][aria-pressed="true"] {
  border-color: #7be3b3;
  color: #04130c;
  background: var(--studio-green);
}

:root[data-bookup-ui="unified-product-v9"] [data-time-class-toggle="blitz"][aria-pressed="true"] {
  border-color: #ffdb93;
  color: #181005;
  background: var(--studio-amber);
}

:root[data-bookup-ui="unified-product-v9"] [data-time-class-toggle="bullet"][aria-pressed="true"] {
  border-color: #b9c9ff;
  color: #090d1c;
  background: #9eb5ff;
}

:root[data-bookup-ui="unified-product-v9"] [data-time-class-toggle="daily"][aria-pressed="true"],
:root[data-bookup-ui="unified-product-v9"] [data-time-class-all][aria-pressed="true"] {
  border-color: #9fcbff;
  color: #07111d;
  background: var(--studio-blue);
}

:root[data-bookup-ui="unified-product-v9"] .field-check {
  align-content: stretch;
}

:root[data-bookup-ui="unified-product-v9"] .setup-actions {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) repeat(2, minmax(110px, 0.55fr));
  gap: 8px;
  margin: 1px 0 0;
}

:root[data-bookup-ui="unified-product-v9"] .setup-actions .progress-stack {
  grid-column: 1 / -1;
  gap: 6px;
  padding: 8px 10px;
  border: 1px solid var(--studio-border);
  border-radius: 8px;
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] .progress-meta {
  gap: 10px;
  font-size: 12px;
}

:root[data-bookup-ui="unified-product-v9"] .summary-card {
  display: grid;
  align-content: start;
  align-self: start;
  gap: 14px;
  position: sticky;
  top: 76px;
}

:root[data-bookup-ui="unified-product-v9"] .summary-card .summary-copy {
  margin: 8px 0 0;
}

:root[data-bookup-ui="unified-product-v9"] .summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

:root[data-bookup-ui="unified-product-v9"] .summary-metric,
:root[data-bookup-ui="unified-product-v9"] .hero-stat {
  min-width: 0;
  padding: 12px;
  border: 1px solid var(--studio-border);
  border-radius: 8px;
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] .summary-metric span {
  margin-bottom: 5px;
  color: var(--studio-dim);
  font-size: 9px;
}

:root[data-bookup-ui="unified-product-v9"] .summary-metric strong {
  color: var(--studio-text);
  font-size: 24px;
}

:root[data-bookup-ui="unified-product-v9"] .summary-action-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

:root[data-bookup-ui="unified-product-v9"] .import-pgn-panel {
  margin-top: 0;
  padding: 11px 13px;
  border-color: var(--studio-border);
  border-radius: 8px;
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] .import-pgn-panel[open] {
  border-color: var(--studio-border-strong);
}

:root[data-bookup-ui="unified-product-v9"] .import-pgn-panel summary,
:root[data-bookup-ui="unified-product-v9"] details > summary {
  color: var(--studio-text);
  font-weight: 750;
}

:root[data-bookup-ui="unified-product-v9"] .import-pgn-panel .summary-copy {
  margin: 8px 0 10px;
}

:root[data-bookup-ui="unified-product-v9"] .setup-live-analysis-shell {
  display: block;
  width: 100%;
  margin-top: var(--product-gap);
}

:root[data-bookup-ui="unified-product-v9"] .analysis-preview-panel {
  width: 100%;
  max-width: none;
  min-height: 0;
  padding: 16px;
  gap: 12px;
  border-color: var(--studio-border);
  border-radius: var(--studio-radius);
  background: var(--studio-panel);
  box-shadow: var(--studio-shadow);
}

:root[data-bookup-ui="unified-product-v9"] .analysis-preview-panel.empty {
  min-height: 78px;
  display: grid;
  place-items: center start;
  border-style: dashed;
  color: var(--studio-muted);
}

:root[data-bookup-ui="unified-product-v9"] .analysis-landscape-metrics {
  gap: 8px;
}

:root[data-bookup-ui="unified-product-v9"] .analysis-landscape-metrics article {
  min-height: 70px;
  padding: 10px 12px;
  border: 1px solid var(--studio-border);
  border-radius: 8px;
  background: var(--studio-panel-inset);
}

/* Repertoire workspace */
:root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"].active {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--product-gap);
  align-items: start;
}

:root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"] > .section-block:nth-child(1) {
  grid-column: 1 / -1;
}

:root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"] > .section-block:nth-child(2),
:root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"] > .section-block:nth-child(4) {
  grid-column: span 5;
}

:root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"] > .section-block:nth-child(3),
:root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"] > .section-block:nth-child(5) {
  grid-column: span 7;
}

:root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"] > .section-block:nth-child(7) {
  grid-column: 1 / -1;
}

:root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"] > .section-block:nth-child(6) {
  grid-column: 1 / -1;
}

:root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"] .section-title {
  font-size: clamp(19px, 1.45vw, 24px);
}

:root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"] .split-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

:root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"] .split-grid > .card {
  padding: 13px;
  background: var(--studio-panel-inset);
  box-shadow: none;
}

:root[data-bookup-ui="unified-product-v9"] .health-dashboard,
:root[data-bookup-ui="unified-product-v9"] .move-tree {
  gap: 9px;
  margin-top: 12px;
}

:root[data-bookup-ui="unified-product-v9"] .preview-panel {
  min-height: 0;
  margin-top: 12px;
}

:root[data-bookup-ui="unified-product-v9"] .product-repertoire-tree {
  margin-block: 0;
}

:root[data-bookup-ui="unified-product-v9"] .move-tree-node {
  border: 1px solid var(--studio-border);
  border-radius: 8px;
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] .move-tree-node summary {
  padding: 10px 12px;
}

:root[data-bookup-ui="unified-product-v9"] .tree-node-list {
  gap: 8px;
  margin: 0;
  padding: 0 10px 10px 20px;
}

/* Progress workspace and first-class time controls */
:root[data-bookup-ui="unified-product-v9"] .progress-cockpit-section {
  padding: 16px;
  border-color: var(--studio-border);
  background: var(--studio-panel);
}

:root[data-bookup-ui="unified-product-v9"] .progress-cockpit-head {
  gap: 14px;
  margin-bottom: 12px;
}

:root[data-bookup-ui="unified-product-v9"] .progress-cockpit-head .summary-copy {
  max-width: 72ch;
  margin: 5px 0 0;
}

:root[data-bookup-ui="unified-product-v9"] .progress-cockpit-actions {
  gap: 8px;
}

:root[data-bookup-ui="unified-product-v9"] .progress-mode-tabs {
  display: inline-grid;
  grid-template-columns: repeat(3, minmax(82px, 1fr));
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--studio-border-strong);
  border-radius: 9px;
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] .progress-mode-btn {
  min-height: 36px;
  padding: 7px 12px;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--studio-muted);
  background: transparent;
  font-size: 12px;
  font-weight: 800;
}

:root[data-bookup-ui="unified-product-v9"] .progress-mode-btn:hover {
  color: var(--studio-text);
  background: var(--studio-panel-raised);
}

:root[data-bookup-ui="unified-product-v9"] .progress-mode-btn[data-progress-mode="rapid"][aria-pressed="true"] {
  border-color: #7be3b3;
  color: #04130c;
  background: var(--studio-green);
}

:root[data-bookup-ui="unified-product-v9"] .progress-mode-btn[data-progress-mode="blitz"][aria-pressed="true"] {
  border-color: #ffdb93;
  color: #181005;
  background: var(--studio-amber);
}

:root[data-bookup-ui="unified-product-v9"] .progress-mode-btn[data-progress-mode="bullet"][aria-pressed="true"] {
  border-color: #b9c9ff;
  color: #090d1c;
  background: #9eb5ff;
}

:root[data-bookup-ui="unified-product-v9"] #progressRefreshBtn {
  min-height: 46px;
}

:root[data-bookup-ui="unified-product-v9"] #progressStatus {
  margin: 0 0 12px;
  padding: 9px 11px;
  border-left: 3px solid var(--studio-blue);
  border-radius: 0 7px 7px 0;
  color: #d7e3f2;
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] .progress-metric-grid-v2 {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
  margin-top: 0;
}

:root[data-bookup-ui="unified-product-v9"] .progress-metric-grid-v2 article {
  min-width: 0;
  padding: 12px;
  border: 1px solid var(--studio-border);
  border-top: 3px solid var(--studio-green);
  border-radius: 8px;
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] .progress-metric-grid-v2 span,
:root[data-bookup-ui="unified-product-v9"] .progress-metric-grid-v2 small {
  color: var(--studio-muted);
}

:root[data-bookup-ui="unified-product-v9"] .progress-metric-grid-v2 strong {
  margin: 5px 0 3px;
  color: var(--studio-text);
  font-size: clamp(21px, 2vw, 30px);
}

:root[data-bookup-ui="unified-product-v9"] .progress-primary-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(320px, 0.75fr);
  gap: 10px;
  margin-top: 10px;
}

:root[data-bookup-ui="unified-product-v9"] .progress-data-panel,
:root[data-bookup-ui="unified-product-v9"] .progress-accuracy-lab {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--studio-border);
  border-radius: 8px;
  color: #e7edf6;
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] .progress-panel-head {
  gap: 12px;
  margin-bottom: 9px;
}

:root[data-bookup-ui="unified-product-v9"] .progress-panel-head p {
  color: var(--studio-muted);
}

:root[data-bookup-ui="unified-product-v9"] .progress-source-tag {
  color: #a9b9ce;
}

:root[data-bookup-ui="unified-product-v9"] .progress-canvas {
  min-height: 170px;
  border: 1px solid rgba(82, 107, 136, 0.6);
  border-radius: 6px;
  background: #08111b;
}

:root[data-bookup-ui="unified-product-v9"] .progress-canvas-large {
  height: 240px;
}

:root[data-bookup-ui="unified-product-v9"] .progress-accuracy-lab {
  margin-top: 10px;
  background: #101b28;
}

:root[data-bookup-ui="unified-product-v9"] .progress-accuracy-summary {
  border-color: var(--studio-border);
}

:root[data-bookup-ui="unified-product-v9"] .progress-accuracy-summary article {
  padding: 13px;
  border-color: var(--studio-border);
}

:root[data-bookup-ui="unified-product-v9"] .progress-accuracy-grid,
:root[data-bookup-ui="unified-product-v9"] .progress-trend-grid,
:root[data-bookup-ui="unified-product-v9"] .progress-dashboard-grid,
:root[data-bookup-ui="unified-product-v9"] .progress-dashboard-grid.lower,
:root[data-bookup-ui="unified-product-v9"] .progress-session-layout {
  gap: 10px;
  margin-top: 10px;
}

:root[data-bookup-ui="unified-product-v9"] .progress-accuracy-grid {
  grid-template-columns: minmax(0, 1.1fr) repeat(2, minmax(230px, 0.8fr));
}

:root[data-bookup-ui="unified-product-v9"] .progress-trend-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

:root[data-bookup-ui="unified-product-v9"] .progress-dashboard-grid.lower {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

:root[data-bookup-ui="unified-product-v9"] .progress-session-form {
  gap: 10px;
}

:root[data-bookup-ui="unified-product-v9"] .progress-session-grid {
  gap: 8px;
}

:root[data-bookup-ui="unified-product-v9"] .progress-phase-track,
:root[data-bookup-ui="unified-product-v9"] .goal-track {
  background: #28384b;
}

:root[data-bookup-ui="unified-product-v9"] .progress-phase-track > span,
:root[data-bookup-ui="unified-product-v9"] .goal-track > div {
  background: linear-gradient(90deg, var(--studio-blue), var(--studio-green));
}

/* Board-first trainer */
:root[data-bookup-ui="unified-product-v9"] .study-layout {
  display: grid;
  grid-template-columns: minmax(560px, 1.7fr) minmax(320px, 0.78fr);
  gap: var(--product-gap);
  align-items: start;
}

:root[data-bookup-ui="unified-product-v9"] .trainer-board-card {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  align-self: start;
  padding: 16px;
}

:root[data-bookup-ui="unified-product-v9"] .trainer-head,
:root[data-bookup-ui="unified-product-v9"] .study-board-shell,
:root[data-bookup-ui="unified-product-v9"] #trainerDecision,
:root[data-bookup-ui="unified-product-v9"] #boardLine,
:root[data-bookup-ui="unified-product-v9"] #trainerFeedback {
  grid-column: 1 / -1;
}

:root[data-bookup-ui="unified-product-v9"] .trainer-head {
  gap: 12px;
  margin-bottom: 2px;
}

:root[data-bookup-ui="unified-product-v9"] .trainer-head .summary-copy {
  max-width: 64ch;
  margin: 5px 0 0;
}

:root[data-bookup-ui="unified-product-v9"] .trainer-actions {
  gap: 7px;
  justify-content: flex-end;
}

:root[data-bookup-ui="unified-product-v9"] .study-board-shell {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 10px;
  align-items: stretch;
  margin: 3px 0 2px;
}

:root[data-bookup-ui="unified-product-v9"] .eval-rail {
  min-width: 0;
  min-height: var(--bookup-board-size, 600px);
  gap: 7px;
}

:root[data-bookup-ui="unified-product-v9"] .eval-score {
  color: var(--studio-text);
  font-size: 12px;
}

:root[data-bookup-ui="unified-product-v9"] .eval-bar {
  width: 18px;
  min-height: 0;
  border-color: var(--studio-border-strong);
  border-radius: 4px;
}

:root[data-bookup-ui="unified-product-v9"] .eval-caption {
  max-width: 7ch;
  color: var(--studio-muted);
  font-size: 8px;
  line-height: 1.3;
}

:root[data-bookup-ui="unified-product-v9"] .board-area {
  display: grid;
  min-width: 0;
  place-items: start center;
}

:root[data-bookup-ui="unified-product-v9"] .board-wrap {
  width: min(100%, calc(var(--bookup-board-size, 640px) + 18px));
}

:root[data-bookup-ui="unified-product-v9"] .board-grid {
  border: 2px solid #0a111a;
  border-radius: 7px;
  box-shadow:
    0 16px 34px rgba(0, 0, 0, 0.34),
    0 0 0 1px var(--studio-border-strong);
}

:root[data-bookup-ui="unified-product-v9"] .board-grid .piece {
  width: 90%;
  height: 90%;
  max-width: none;
}

:root[data-bookup-ui="unified-product-v9"] .piece-drag-ghost {
  width: clamp(28px, calc(var(--bookup-board-size, 640px) / 8 * 0.9), 74px);
  height: clamp(28px, calc(var(--bookup-board-size, 640px) / 8 * 0.9), 74px);
}

:root[data-bookup-ui="unified-product-v9"] .square.light {
  background: #ead9b7;
}

:root[data-bookup-ui="unified-product-v9"] .square.dark {
  background: #9f7454;
}

:root[data-bookup-ui="unified-product-v9"] .square.selected::after {
  background: rgba(78, 183, 255, 0.36);
  box-shadow: inset 0 0 0 4px #52c5ff;
}

:root[data-bookup-ui="unified-product-v9"] .square.legal-target .move-dot {
  background: rgba(4, 15, 25, 0.34);
}

:root[data-bookup-ui="unified-product-v9"] .square.legal-capture .move-dot {
  border-color: rgba(4, 15, 25, 0.38);
}

:root[data-bookup-ui="unified-product-v9"] .rank-labels,
:root[data-bookup-ui="unified-product-v9"] .file-labels {
  color: var(--studio-muted);
  font-size: 10px;
}

:root[data-bookup-ui="unified-product-v9"] #trainerCoach,
:root[data-bookup-ui="unified-product-v9"] #trainerInsight,
:root[data-bookup-ui="unified-product-v9"] #trainerDecision,
:root[data-bookup-ui="unified-product-v9"] #boardLine,
:root[data-bookup-ui="unified-product-v9"] #trainerFeedback {
  min-height: 0;
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--studio-border);
  border-radius: 8px;
  color: #dce7f5;
  line-height: 1.5;
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] #trainerCoach {
  border-left: 3px solid var(--studio-blue);
}

:root[data-bookup-ui="unified-product-v9"] #trainerInsight {
  border-left: 3px solid var(--studio-green);
}

:root[data-bookup-ui="unified-product-v9"] #trainerDecision {
  border-left: 3px solid var(--studio-amber);
  color: var(--studio-text);
}

:root[data-bookup-ui="unified-product-v9"] #boardLine {
  color: #c8d6e8;
  font-family: var(--mono);
  font-size: 12px;
}

:root[data-bookup-ui="unified-product-v9"] #trainerFeedback {
  border-color: rgba(91, 217, 158, 0.46);
  color: #a7efca;
  background: rgba(25, 69, 51, 0.34);
}

:root[data-bookup-ui="unified-product-v9"] .study-side-column {
  gap: 12px;
}

:root[data-bookup-ui="unified-product-v9"] .study-panel-card,
:root[data-bookup-ui="unified-product-v9"] .trainer-queue-card {
  gap: 12px;
  align-self: start;
}

:root[data-bookup-ui="unified-product-v9"] .study-panel-card > .section-title,
:root[data-bookup-ui="unified-product-v9"] .trainer-queue-card > .section-title {
  font-size: clamp(19px, 1.45vw, 24px);
}

:root[data-bookup-ui="unified-product-v9"] .study-panel-section {
  gap: 9px;
  padding-top: 12px;
  border-color: var(--studio-border);
}

:root[data-bookup-ui="unified-product-v9"] .study-section-header {
  gap: 8px;
  color: var(--studio-text);
}

:root[data-bookup-ui="unified-product-v9"] .study-move-trail,
:root[data-bookup-ui="unified-product-v9"] .realign-output {
  padding: 11px 12px;
  border: 1px solid var(--studio-border);
  border-radius: 8px;
  color: #dce7f5;
  background: var(--studio-panel-inset);
}

/* Smart Theory is a working analysis desk, not a landing page. */
:root[data-bookup-ui="unified-product-v9"] .smart-theory-workspace {
  padding: 14px;
  background: var(--studio-panel);
}

:root[data-bookup-ui="unified-product-v9"] .smart-theory-header {
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 12px;
}

:root[data-bookup-ui="unified-product-v9"] .smart-theory-header p {
  max-width: 74ch;
  margin: 5px 0 0;
  color: var(--studio-muted);
}

:root[data-bookup-ui="unified-product-v9"] .smart-theory-presets {
  flex-wrap: nowrap;
  gap: 5px;
  margin: 0;
}

:root[data-bookup-ui="unified-product-v9"] .smart-preset-btn {
  min-width: 72px;
  min-height: 36px;
  padding: 7px 10px;
}

:root[data-bookup-ui="unified-product-v9"] .smart-theory-grid {
  display: grid;
  grid-template-columns: minmax(210px, 0.66fr) minmax(400px, 1.45fr) minmax(270px, 0.88fr);
  min-height: 620px;
  overflow: hidden;
  border: 1px solid var(--studio-border-strong);
  border-radius: 9px 9px 0 0;
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] .smart-theory-rail,
:root[data-bookup-ui="unified-product-v9"] .smart-theory-stage {
  min-width: 0;
  padding: 14px;
}

:root[data-bookup-ui="unified-product-v9"] .smart-source-rail {
  border-right-color: var(--studio-border);
  background: #101b28;
}

:root[data-bookup-ui="unified-product-v9"] .smart-tree-rail {
  border-left-color: var(--studio-border);
  background: #101b28;
}

:root[data-bookup-ui="unified-product-v9"] .smart-theory-stage {
  background:
    linear-gradient(rgba(123, 180, 255, 0.025) 1px, transparent 1px) 0 0 / 32px 32px,
    linear-gradient(90deg, rgba(123, 180, 255, 0.025) 1px, transparent 1px) 0 0 / 32px 32px,
    #0b1520;
}

:root[data-bookup-ui="unified-product-v9"] .smart-panel-heading {
  gap: 9px;
  margin-bottom: 12px;
}

:root[data-bookup-ui="unified-product-v9"] .smart-panel-heading > span {
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  border: 1px solid var(--studio-border-strong);
  border-radius: 6px;
  color: var(--studio-blue);
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] .smart-panel-heading strong {
  color: var(--studio-text);
}

:root[data-bookup-ui="unified-product-v9"] .smart-panel-heading small,
:root[data-bookup-ui="unified-product-v9"] .smart-source-preview {
  color: var(--studio-muted);
}

:root[data-bookup-ui="unified-product-v9"] .smart-source-preview,
:root[data-bookup-ui="unified-product-v9"] .smart-fen-panel,
:root[data-bookup-ui="unified-product-v9"] .smart-selected-strip,
:root[data-bookup-ui="unified-product-v9"] .smart-inspector-section {
  margin-top: 11px;
  padding-top: 11px;
  border-color: var(--studio-border);
}

:root[data-bookup-ui="unified-product-v9"] .smart-stage-topline {
  width: min(100%, 590px);
  margin-bottom: 9px;
}

:root[data-bookup-ui="unified-product-v9"] .smart-stage-topline span {
  color: var(--studio-muted);
}

:root[data-bookup-ui="unified-product-v9"] .smart-stage-topline strong {
  color: var(--studio-text);
}

:root[data-bookup-ui="unified-product-v9"] .smart-board-shell {
  width: min(100%, calc(100svh - 270px));
  max-width: 590px;
  gap: 7px;
}

:root[data-bookup-ui="unified-product-v9"] .smart-eval-rail {
  border-color: var(--studio-border-strong);
  background: #050a10;
}

:root[data-bookup-ui="unified-product-v9"] .smart-theory-mini-board {
  border-color: var(--studio-border-strong);
  background: #08111b;
}

:root[data-bookup-ui="unified-product-v9"] .smart-move-path,
:root[data-bookup-ui="unified-product-v9"] .smart-selected-strip,
:root[data-bookup-ui="unified-product-v9"] .smart-fen-panel {
  width: min(100%, 590px);
}

:root[data-bookup-ui="unified-product-v9"] .smart-move-path {
  min-height: 36px;
  margin-top: 9px;
  padding: 8px 10px;
  border-color: var(--studio-border);
  border-radius: 7px;
  color: var(--studio-muted);
  background: var(--studio-panel-inset);
}

:root[data-bookup-ui="unified-product-v9"] .smart-selected-strip {
  gap: 9px;
}

:root[data-bookup-ui="unified-product-v9"] .smart-tree-toolbar {
  gap: 6px;
  margin-bottom: 9px;
}

:root[data-bookup-ui="unified-product-v9"] .smart-tree-row,
:root[data-bookup-ui="unified-product-v9"] .smart-reply-row {
  min-height: 38px;
  border-radius: 6px;
}

:root[data-bookup-ui="unified-product-v9"] .smart-tree-row:hover,
:root[data-bookup-ui="unified-product-v9"] .smart-tree-row.selected {
  border-color: rgba(123, 180, 255, 0.64);
  background: rgba(76, 146, 242, 0.18);
}

:root[data-bookup-ui="unified-product-v9"] .smart-command-bar {
  position: sticky;
  bottom: 0;
  z-index: 35;
  grid-template-columns: auto minmax(320px, 1fr) minmax(220px, 0.65fr);
  gap: 9px;
  padding: 9px;
  border: 1px solid var(--studio-border-strong);
  border-top: 0;
  border-radius: 0 0 9px 9px;
  background: rgba(8, 15, 24, 0.98);
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(14px);
}

:root[data-bookup-ui="unified-product-v9"] .smart-primary-actions,
:root[data-bookup-ui="unified-product-v9"] .smart-secondary-actions {
  gap: 5px;
}

:root[data-bookup-ui="unified-product-v9"] .smart-command-bar :is(.launch-btn, .ghost-btn, label.ghost-btn) {
  min-height: 35px;
  padding: 6px 9px;
  font-size: 11px;
}

:root[data-bookup-ui="unified-product-v9"] .smart-command-status strong {
  color: var(--studio-text);
}

:root[data-bookup-ui="unified-product-v9"] .smart-command-status span {
  color: var(--studio-muted);
}

:root[data-bookup-ui="unified-product-v9"] .smart-export-settings {
  margin-top: 10px;
  padding: 11px 13px;
  border: 1px solid var(--studio-border);
  border-radius: 8px;
  background: var(--studio-panel-inset);
}

/* Tablet: command nav becomes a compact sticky row. */
@media (max-width: 1180px) {
  :root[data-bookup-ui="unified-product-v9"] .app-shell {
    display: block;
  }

  :root[data-bookup-ui="unified-product-v9"] .workspace-tabs {
    top: 60px;
    flex-direction: row;
    height: auto;
    padding: 7px 12px;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--studio-border);
    scrollbar-width: none;
  }

  :root[data-bookup-ui="unified-product-v9"] .workspace-tab {
    width: auto;
    min-width: max-content;
    min-height: 38px;
    padding: 0 13px;
    text-align: center;
  }

  :root[data-bookup-ui="unified-product-v9"] .workspace-tab.active,
  :root[data-bookup-ui="unified-product-v9"] .workspace-tab[aria-selected="true"] {
    box-shadow: inset 0 -3px 0 var(--studio-blue);
  }

  :root[data-bookup-ui="unified-product-v9"] .workspace-panel {
    padding: clamp(12px, 2vw, 18px);
  }

  :root[data-bookup-ui="unified-product-v9"] .setup-layout {
    grid-template-columns: minmax(560px, 1.2fr) minmax(300px, 0.8fr);
  }

  :root[data-bookup-ui="unified-product-v9"] .study-layout {
    grid-template-columns: minmax(520px, 1.5fr) minmax(300px, 0.8fr);
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-theory-grid {
    grid-template-columns: minmax(210px, 0.68fr) minmax(420px, 1.35fr);
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-tree-rail {
    grid-column: 1 / -1;
    max-height: 480px;
    border-top: 1px solid var(--studio-border);
    border-left: 0;
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-command-bar {
    grid-template-columns: 1fr;
  }
}

/* Narrow tablet: single-column workspaces, with the board kept first. */
@media (max-width: 1100px) {
  :root[data-bookup-ui="unified-product-v9"] .product-header-stats {
    display: none;
  }

  :root[data-bookup-ui="unified-product-v9"] .setup-layout,
  :root[data-bookup-ui="unified-product-v9"] .study-layout,
  :root[data-bookup-ui="unified-product-v9"] .progress-primary-grid,
  :root[data-bookup-ui="unified-product-v9"] .progress-accuracy-grid,
  :root[data-bookup-ui="unified-product-v9"] .progress-dashboard-grid,
  :root[data-bookup-ui="unified-product-v9"] .progress-dashboard-grid.lower,
  :root[data-bookup-ui="unified-product-v9"] .progress-session-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  :root[data-bookup-ui="unified-product-v9"] .summary-card {
    position: static;
  }

  :root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"].active {
    grid-template-columns: 1fr;
  }

  :root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"] > .section-block {
    grid-column: 1 !important;
  }

  :root[data-bookup-ui="unified-product-v9"] .study-side-column {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
    align-items: start;
  }

  :root[data-bookup-ui="unified-product-v9"] .progress-metric-grid-v2 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  :root[data-bookup-ui="unified-product-v9"] .progress-trend-grid {
    grid-template-columns: 1fr;
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-theory-grid {
    display: flex;
    flex-direction: column;
    min-height: 0;
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-theory-stage {
    order: 1;
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-source-rail {
    order: 2;
    border-top: 1px solid var(--studio-border);
    border-right: 0;
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-tree-rail {
    order: 3;
    max-height: none;
  }
}

/* Phones: bottom workspaces, compact forms, no horizontal overflow. */
@media (max-width: 620px) {
  :root[data-bookup-ui="unified-product-v9"] {
    --product-gap: 9px;
  }

  :root[data-bookup-ui="unified-product-v9"] body {
    padding-bottom: calc(64px + env(safe-area-inset-bottom));
    background:
      radial-gradient(circle at 75% -8%, rgba(76, 146, 242, 0.14), transparent 24rem),
      var(--studio-bg);
  }

  :root[data-bookup-ui="unified-product-v9"] body::before {
    display: none;
  }

  :root[data-bookup-ui="unified-product-v9"] .topbar {
    position: sticky;
    min-height: 56px;
    padding: 8px 10px;
  }

  :root[data-bookup-ui="unified-product-v9"] .product-header {
    grid-template-columns: minmax(0, 1fr) auto;
    min-height: 39px;
  }

  :root[data-bookup-ui="unified-product-v9"] .product-header-actions {
    justify-content: flex-end;
  }

  :root[data-bookup-ui="unified-product-v9"] .product-mark {
    width: 36px;
  }

  :root[data-bookup-ui="unified-product-v9"] .product-brand-copy strong {
    font-size: 18px;
  }

  :root[data-bookup-ui="unified-product-v9"] .product-brand-copy span {
    max-width: 52vw;
  }

  :root[data-bookup-ui="unified-product-v9"] .product-home-button {
    min-height: 36px;
    padding: 0 11px;
  }

  :root[data-bookup-ui="unified-product-v9"] .workspace-tabs {
    position: fixed;
    inset: auto 0 0;
    z-index: 110;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 2px;
    padding:
      5px max(5px, env(safe-area-inset-right))
      calc(5px + env(safe-area-inset-bottom))
      max(5px, env(safe-area-inset-left));
    border: 0;
    border-top: 1px solid var(--studio-border);
    background: rgba(8, 14, 22, 0.99);
  }

  :root[data-bookup-ui="unified-product-v9"] .workspace-tab {
    width: 100%;
    min-width: 0;
    min-height: 50px;
    padding: 4px 2px;
    border: 0;
    border-radius: 6px;
    font-size: clamp(9px, 2.7vw, 11px);
    line-height: 1.1;
    text-align: center;
    overflow-wrap: anywhere;
  }

  :root[data-bookup-ui="unified-product-v9"] .workspace-tab.active,
  :root[data-bookup-ui="unified-product-v9"] .workspace-tab[aria-selected="true"] {
    background: rgba(76, 146, 242, 0.2);
    box-shadow: inset 0 3px 0 var(--studio-blue);
  }

  :root[data-bookup-ui="unified-product-v9"] .workspace-panel {
    padding: 9px;
  }

  :root[data-bookup-ui="unified-product-v9"] .card,
  :root[data-bookup-ui="unified-product-v9"] .section-block,
  :root[data-bookup-ui="unified-product-v9"] .smart-theory-workspace {
    padding: 12px;
    border-radius: 8px;
  }

  :root[data-bookup-ui="unified-product-v9"] .section-title {
    font-size: clamp(19px, 6vw, 24px);
  }

  :root[data-bookup-ui="unified-product-v9"] .setup-card .form-grid,
  :root[data-bookup-ui="unified-product-v9"] .summary-grid,
  :root[data-bookup-ui="unified-product-v9"] .progress-metric-grid-v2,
  :root[data-bookup-ui="unified-product-v9"] .progress-accuracy-summary,
  :root[data-bookup-ui="unified-product-v9"] .progress-session-grid,
  :root[data-bookup-ui="unified-product-v9"] .progress-goal-grid,
  :root[data-bookup-ui="unified-product-v9"] .study-side-column,
  :root[data-bookup-ui="unified-product-v9"] [data-tab-panel="repertoire-map"] .split-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  :root[data-bookup-ui="unified-product-v9"] .setup-card .field:has([data-time-class-toggle]) {
    grid-column: 1;
  }

  :root[data-bookup-ui="unified-product-v9"] .setup-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  :root[data-bookup-ui="unified-product-v9"] .setup-actions .primary-btn,
  :root[data-bookup-ui="unified-product-v9"] .setup-actions .progress-stack {
    grid-column: 1 / -1;
  }

  :root[data-bookup-ui="unified-product-v9"] .summary-action-row {
    grid-template-columns: 1fr;
  }

  :root[data-bookup-ui="unified-product-v9"] .progress-cockpit-head,
  :root[data-bookup-ui="unified-product-v9"] .progress-cockpit-actions,
  :root[data-bookup-ui="unified-product-v9"] .progress-panel-head,
  :root[data-bookup-ui="unified-product-v9"] .smart-theory-header,
  :root[data-bookup-ui="unified-product-v9"] .trainer-head {
    align-items: stretch;
    flex-direction: column;
  }

  :root[data-bookup-ui="unified-product-v9"] .progress-cockpit-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  :root[data-bookup-ui="unified-product-v9"] .progress-mode-tabs {
    width: 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  :root[data-bookup-ui="unified-product-v9"] .progress-mode-btn {
    padding-inline: 5px;
  }

  :root[data-bookup-ui="unified-product-v9"] .trainer-board-card {
    grid-template-columns: 1fr;
  }

  :root[data-bookup-ui="unified-product-v9"] .trainer-board-card > * {
    grid-column: 1;
  }

  :root[data-bookup-ui="unified-product-v9"] .trainer-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  :root[data-bookup-ui="unified-product-v9"] .study-board-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 7px;
  }

  :root[data-bookup-ui="unified-product-v9"] .eval-rail {
    min-height: 0;
    flex-direction: row;
    align-items: center;
    gap: 5px;
  }

  :root[data-bookup-ui="unified-product-v9"] .eval-bar {
    width: 100%;
    min-height: 12px;
    height: 12px;
    flex: 1 1 auto;
    background: linear-gradient(90deg, #050a10 0%, #050a10 50%, #eef3fa 50%, #eef3fa 100%);
  }

  :root[data-bookup-ui="unified-product-v9"] .eval-fill {
    inset: 0 auto 0 0;
    width: var(--eval-percent, 50%);
    height: 100%;
  }

  :root[data-bookup-ui="unified-product-v9"] .eval-caption {
    max-width: none;
    font-size: 7px;
    white-space: nowrap;
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-theory-presets {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    width: 100%;
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-preset-btn {
    width: 100%;
    min-width: 0;
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-theory-stage,
  :root[data-bookup-ui="unified-product-v9"] .smart-theory-rail {
    padding: 10px;
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-board-shell {
    width: 100%;
    grid-template-columns: 8px minmax(0, 1fr);
    gap: 5px;
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-selected-strip,
  :root[data-bookup-ui="unified-product-v9"] .smart-tree-toolbar,
  :root[data-bookup-ui="unified-product-v9"] .smart-theory-controls,
  :root[data-bookup-ui="unified-product-v9"] .smart-advanced-grid {
    grid-template-columns: 1fr;
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-command-bar {
    position: static;
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-primary-actions,
  :root[data-bookup-ui="unified-product-v9"] .smart-secondary-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  :root[data-bookup-ui="unified-product-v9"] .smart-command-status strong,
  :root[data-bookup-ui="unified-product-v9"] .smart-command-status span {
    overflow: visible;
    text-overflow: clip;
    white-space: normal;
  }
}

@media (max-width: 390px) {
  :root[data-bookup-ui="unified-product-v9"] .product-brand-copy span {
    display: none;
  }

  :root[data-bookup-ui="unified-product-v9"] .setup-actions,
  :root[data-bookup-ui="unified-product-v9"] .trainer-actions,
  :root[data-bookup-ui="unified-product-v9"] .smart-primary-actions,
  :root[data-bookup-ui="unified-product-v9"] .smart-secondary-actions {
    grid-template-columns: 1fr;
  }

  :root[data-bookup-ui="unified-product-v9"] .setup-actions > *,
  :root[data-bookup-ui="unified-product-v9"] .setup-actions .primary-btn {
    grid-column: 1;
  }

  :root[data-bookup-ui="unified-product-v9"] .progress-mode-tabs {
    gap: 2px;
    padding: 3px;
  }
}

@media (prefers-contrast: more) {
  :root[data-bookup-ui="unified-product-v9"] {
    --studio-border: #5f7793;
    --studio-border-strong: #8298b2;
    --studio-muted: #d1dae7;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root[data-bookup-ui="unified-product-v9"] *,
  :root[data-bookup-ui="unified-product-v9"] *::before,
  :root[data-bookup-ui="unified-product-v9"] *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Retain accessibility and rendering safeguards with the original theme. */
html { scroll-behavior: auto; }
body { min-width: 0; }
body, body::before, body::after { animation: none; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 1000; padding: 12px; background: var(--product-bg); color: var(--product-text); transform: translateY(-200%); }
.skip-link:focus { transform: none; }
.field-hint { font-size: 12px; color: var(--product-muted); }
.field input[aria-invalid="true"] { outline: 2px solid var(--product-danger); }
.workspace-panel:focus-visible { outline: 3px solid var(--product-accent); outline-offset: -3px; }
[data-tone="error"] { color: var(--product-danger); }
[data-tone="success"] { color: var(--product-good); }