/* Shared presentation for the Academy, its visual lessons, and the sandbox. */
:root[data-theme],
:root:not([data-theme]) {
  /* The shared header owns the top safe area. These selectors also override
     the original document's light and dark palettes without changing state. */
  padding: 0;
  --g900: var(--bo-bg);
  --g800: var(--bo-surface);
  --g700: var(--bo-paper);
  --g600: var(--bo-line);
  --steel: var(--bo-muted);
  --white: var(--bo-text);
  --topbar-bg: var(--bo-paper);
  --hivis: var(--bo-primary);
  --hivis2: var(--bo-primary-hover);
  --red: var(--bo-red);
  --green: var(--bo-green);
  --bronze: var(--bo-gold);
  --amber: var(--bo-gold);
  --bronze-wash: var(--bo-brass-soft);
  --hi-wash: var(--bo-blue-soft);
  --red-wash: var(--bo-red-soft);
  --green-wash: var(--bo-green-soft);
  --display: var(--bo-font-ui);
  --body: var(--bo-font-ui);
  --mono: var(--bo-font-mono);
  --r-sm: 4px;
  --r-md: 6px;
  --lead1: var(--bo-primary);
  --lead2: var(--bo-gold);
  --lead3: var(--bo-green);

  /* The preserved Owner Sandbox uses a separate legacy token set. */
  --bg: var(--bo-bg);
  --surface: var(--bo-paper);
  --raised: var(--bo-surface);
  --ink: var(--bo-text);
  --muted: var(--bo-muted);
  --line: var(--bo-line);
  --chip: var(--bo-brass-soft);
  --accent: var(--bo-primary);
  --accent-ink: var(--bo-on-primary);
  --signal: var(--bo-brass);
  --signal-ink: #071c2e;
  --good: var(--bo-green);
  --bad: var(--bo-red);
  --warn: var(--bo-gold);
  --f-d: var(--bo-font-ui);
  --f-b: var(--bo-font-ui);
  --f-m: var(--bo-font-mono);
}

#ac-app .btn-primary,
#ac-app .logo {
  color: var(--bo-on-primary);
}

#ac-app .btn-academy {
  background: var(--bo-brass);
  border-color: var(--bo-brass);
  color: #071c2e;
}

#ac-app .btn-academy:hover:not(:disabled) {
  border-color: var(--bo-brass);
}

#ac-app .step.done .ix {
  color: var(--bo-paper);
}

/* The shared navigation already provides the Buoyant home link. */
#ac-app .t-brand {
  display: none;
}

#ac-app .t-prod {
  border-left: 0;
  padding-left: 0;
}

#ac-app .t-hero h1 {
  font-family: var(--bo-font-heading);
  font-size: clamp(2.4rem, 4.9vw, 4.1rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -.04em;
  text-transform: none;
}

#ac-app .t-hero h1 em {
  font-style: italic;
}

#ac-app .ac-field-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: clamp(18px, 3vw, 28px);
  margin-bottom: 24px;
  border: 1px solid var(--bo-gold);
  border-radius: 8px;
  background: var(--bo-brass-soft);
}

#ac-app .ac-field-entry > div { min-width: 0; }
#ac-app .ac-field-entry .eyebrow { color: var(--bo-gold); }
#ac-app .ac-field-entry h2 { margin: 8px 0; font: 700 clamp(1.4rem, 3vw, 1.9rem)/1.2 var(--bo-font-heading); }
#ac-app .ac-field-entry p { max-width: 66ch; color: var(--bo-muted); font-size: .95rem; line-height: 1.6; }
#ac-app .ac-field-entry ol { display: flex; flex-wrap: wrap; gap: 6px 24px; padding: 0 0 0 18px; margin: 14px 0 0; font-size: .8rem; }
#ac-app .ac-field-entry li { padding-left: 2px; }
#ac-app .ac-field-entry li::marker { color: var(--bo-gold); font-weight: 700; }
#ac-app .ac-field-entry .btn { flex: 0 0 auto; min-height: 48px; text-decoration: none; }

@media (max-width: 640px) {
  #ac-app .ac-field-entry { flex-direction: column; align-items: stretch; gap: 18px; }
  #ac-app .ac-field-entry .btn { width: 100%; justify-content: center; }
}

/* Keep game controls below the measured, responsive shared header. */
#ac-app .top,
#sb .hud {
  top: var(--bo-header-height);
}

#ac-app .shell {
  min-height: calc(100vh - var(--bo-header-height));
  min-height: calc(100dvh - var(--bo-header-height));
}

#ac-app .toast {
  top: calc(var(--bo-header-height) + 76px);
}

#sb::before {
  display: none;
}

@media (min-width: 901px) {
  #ac-app .side {
    top: var(--bo-header-height);
    height: calc(100vh - var(--bo-header-height));
    height: calc(100dvh - var(--bo-header-height));
  }
}

/* The existing mobile drawer and modal layers remain above the shared header. */
@media (max-width: 480px) {
  #ac-app .t-hero h1 {
    font-size: clamp(2.1rem, 8.4vw, 2.7rem);
  }
}

/* Visual lessons keep the same paper, ink, and brass as the game room. */
#ac-app .mcard.ac-lesson-dialog {
  max-width: 920px;
}

#ac-app .ac-lesson-dialog .mhead {
  padding: 20px 26px 16px;
}

#ac-app .ac-lesson-dialog .mhead h2 {
  font-family: var(--bo-font-heading);
  font-size: clamp(1.3rem, 3.4vw, 1.8rem);
  line-height: 1.18;
  letter-spacing: -.02em;
  text-transform: none;
}

#ac-app .ac-lesson-dialog .mbody {
  padding: 16px 26px 24px;
  gap: 18px;
  overscroll-behavior: contain;
}

#ac-app .ac-lesson-dialog .mfoot {
  padding-inline: 26px;
  flex-shrink: 0;
  background: var(--bo-paper);
}

#ac-app .ac-lesson-dialog .eyebrow {
  color: var(--bo-gold);
}

#ac-app .ac-lesson-progress > div {
  display: flex;
  justify-content: space-between;
  gap: 6px 16px;
  flex-wrap: wrap;
  color: var(--bo-muted);
  font-size: .76rem;
}

#ac-app .ac-lesson-progress > div > :first-child {
  color: var(--bo-text);
  font-weight: 700;
}

#ac-app .ac-lesson-progress progress {
  appearance: none;
  display: block;
  width: 100%;
  height: 5px;
  margin-top: 9px;
  border: 0;
  border-radius: 4px;
  overflow: hidden;
  color: var(--bo-gold);
  background: var(--bo-line);
}

#ac-app .ac-lesson-progress progress::-webkit-progress-bar {
  background: var(--bo-line);
}

#ac-app .ac-lesson-progress progress::-webkit-progress-value {
  background: var(--bo-gold);
}

#ac-app .ac-lesson-progress progress::-moz-progress-bar {
  background: var(--bo-gold);
}

#ac-app .ac-lesson-outline,
#ac-app .ac-lesson-sources {
  color: var(--bo-muted);
  font-size: .8rem;
}

#ac-app .ac-lesson-outline summary,
#ac-app .ac-lesson-sources summary {
  cursor: pointer;
  padding-block: 8px;
  min-height: 44px;
  color: var(--bo-text);
  font-weight: 600;
}

#ac-app .ac-lesson-outline summary > span {
  margin-left: 8px;
  color: var(--bo-muted);
  font-size: .74rem;
  font-weight: 400;
}

#ac-app .ac-lesson-outline ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  list-style: none;
  padding: 6px 0 10px;
  margin: 0;
}

#ac-app .ac-lesson-outline li {
  min-width: 0;
}

#ac-app .ac-lesson-outline button {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 44px;
  padding: 9px 12px;
  color: var(--bo-text);
  background: var(--bo-paper);
  border: 1px solid var(--bo-line);
  border-radius: 6px;
  text-align: left;
  line-height: 1.4;
  font-size: .8rem;
}

#ac-app .ac-lesson-outline button > span {
  color: var(--bo-gold);
  font-family: var(--bo-font-mono);
  font-size: .74rem;
}

#ac-app .ac-lesson-outline button[aria-current] {
  background: var(--bo-brass-soft);
  border-color: var(--bo-gold);
}

#ac-app .ac-lesson-card,
#ac-app .ac-lesson-check,
#ac-app .ac-lesson-complete {
  display: grid;
  gap: 20px;
  min-width: 0;
}

#ac-app .ac-lesson-card > :is(.ac-lesson-figure, .ac-lesson-lab) {
  margin: 0;
}

#ac-app .ac-lesson-card h3,
#ac-app .ac-lesson-check h3,
#ac-app .ac-lesson-complete h3 {
  font-family: var(--bo-font-heading);
  font-size: clamp(1.45rem, 3.9vw, 2rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.02em;
  text-wrap: balance;
  margin: 6px 0 0;
}

#ac-app .ac-lesson-objective {
  margin-top: 12px;
  color: var(--bo-muted);
  line-height: 1.6;
  font-size: .88rem;
}

#ac-app .ac-lesson-objective b {
  color: var(--bo-text);
  margin-right: 4px;
}

#ac-app .ac-lesson-prose {
  display: grid;
  gap: 12px;
  line-height: 1.7;
  font-size: .92rem;
}

#ac-app .ac-lesson-prose p {
  margin: 0;
  white-space: pre-line;
}

#ac-app .ac-lesson-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 20px;
  margin: 0;
}

#ac-app .ac-lesson-points > div {
  border-top: 2px solid var(--bo-line);
  padding-top: 10px;
}

#ac-app .ac-lesson-points dt {
  font-size: .86rem;
  font-weight: 700;
  margin-bottom: 4px;
}

#ac-app .ac-lesson-points dd {
  margin: 0;
  color: var(--bo-muted);
  font-size: .84rem;
  line-height: 1.65;
}

#ac-app .ac-lesson-example {
  padding: 18px 20px;
  background: var(--bo-paper);
  border: 1px solid var(--bo-line);
  border-radius: 8px;
  line-height: 1.6;
  font-size: .86rem;
}

#ac-app .ac-lesson-example h4 {
  margin: 6px 0 12px;
  color: var(--bo-text);
  font-size: 1rem;
  line-height: 1.4;
}

#ac-app .ac-lesson-example ol {
  display: grid;
  gap: 7px;
  padding-left: 22px;
  margin: 0;
}

#ac-app .ac-lesson-example li::marker {
  color: var(--bo-gold);
  font-family: var(--bo-font-mono);
  font-size: .78rem;
}

#ac-app .ac-lesson-result {
  border-top: 1px solid var(--bo-line);
  padding-top: 12px;
  margin: 14px 0 0;
  font-weight: 700;
}

#ac-app .ac-lesson-action {
  padding: 14px 18px;
  background: var(--bo-brass-soft);
  border-left: 3px solid var(--bo-gold);
  border-radius: 0 6px 6px 0;
  line-height: 1.65;
  font-size: .85rem;
}

#ac-app .ac-lesson-action b {
  display: block;
  margin-bottom: 3px;
}

#ac-app .ac-lesson-action p {
  margin: 0;
}

#ac-app .ac-lesson-sources {
  border-top: 1px solid var(--bo-line);
  padding-top: 8px;
  line-height: 1.65;
}

#ac-app .ac-lesson-sources p {
  margin: 8px 0;
}

#ac-app .ac-lesson-sources ul {
  padding-left: 20px;
  margin: 8px 0;
}

#ac-app .ac-lesson-sources li + li {
  margin-top: 6px;
}

#ac-app .ac-lesson-sources a {
  color: var(--bo-gold);
  text-decoration: underline;
  text-underline-offset: 3px;
  overflow-wrap: anywhere;
}

#ac-app .ac-lesson-results {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid var(--bo-line);
  border-radius: 8px;
  overflow: hidden;
}

#ac-app .ac-lesson-results > div {
  display: grid;
  gap: 5px;
  padding: 18px;
  background: var(--bo-paper);
}

#ac-app .ac-lesson-results > div + div {
  border-left: 1px solid var(--bo-line);
}

#ac-app .ac-lesson-results span {
  font-size: .75rem;
  color: var(--bo-muted);
}

#ac-app .ac-lesson-results b {
  color: var(--bo-gold);
  font: 600 clamp(1rem, 3vw, 1.7rem)/1.3 var(--bo-font-mono);
}

#ac-app .ac-lesson-dialog :is(button, summary, a):focus-visible {
  outline: 3px solid var(--bo-gold);
  outline-offset: 3px;
}

@media (max-width: 600px) {
  #ac-app .ac-lesson-dialog .mhead,
  #ac-app .ac-lesson-dialog .mbody,
  #ac-app .ac-lesson-dialog .mfoot {
    padding-inline: 16px;
  }

  #ac-app .ac-lesson-outline ol,
  #ac-app .ac-lesson-points {
    grid-template-columns: minmax(0, 1fr);
  }

  #ac-app .ac-lesson-example {
    padding: 15px;
  }

  #ac-app .ac-lesson-results > div {
    padding: 13px 10px;
  }

  #ac-app .ac-lesson-dialog .mfoot .btn {
    min-height: 44px;
  }
}

/* Allow long content to shrink inside cards; wide data stays in its own scroller. */
#ac-app :is(.card, .stack, .row2, .fsec, .fld, .mcard, .mbody, .ac-lesson-card-heading),
#sb :is(.panel, .stack, .ticket, .t-body, .two) {
  min-width: 0;
}

#ac-app .tbl,
#sb .scroll-x {
  max-width: 100%;
  overscroll-behavior-x: contain;
  scrollbar-color: var(--bo-muted) var(--bo-paper);
}

/* The document behind a dialog or mobile drawer should stay where the player left it. */
body:has(#ac-root:not([hidden]) .modal),
body:has(#sb:not([hidden]) .sheet:not([hidden])) {
  overflow: hidden;
}

#ac-app .modal {
  height: 100vh;
  height: 100dvh;
  overscroll-behavior: contain;
}

#ac-app .mcard {
  min-height: 0;
}

#ac-app .mhead,
#ac-app .mfoot {
  flex-shrink: 0;
}

#ac-app .mhead > div {
  min-width: 0;
}

#ac-app .mbody {
  min-height: 0;
  overscroll-behavior-y: contain;
  -webkit-overflow-scrolling: touch;
}

#ac-app .mhead .xbtn {
  flex-shrink: 0;
}

/* Touch controls keep their labels and remain comfortable on phones and tablets. */
@media (max-width: 900px), (pointer: coarse) {
  #ac-app :is(.btn, .chip, .opt, .shot, .add, .ev, .chk, .switch, .wopt),
  #sb :is(.btn, .tab, .chk, .linkish) {
    min-height: 44px;
  }

  #ac-app .btn,
  #sb .btn {
    max-width: 100%;
    white-space: normal;
    text-align: center;
    line-height: 1.35;
  }

  #ac-app .btn-sm {
    font-size: .85rem;
  }

  #ac-app :is(.burger, .xbtn) {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
  }

  #ac-app .nl {
    height: auto;
    min-height: 44px;
    padding-block: 8px;
  }

  #ac-app .inp,
  #ac-app select.inp,
  #ac-app textarea.inp,
  #sb input:not([type="checkbox"]):not([type="range"]),
  #sb select,
  #sb textarea {
    min-width: 0;
    min-height: 44px;
    font-size: 16px;
  }

  #sb input[type="range"] {
    min-height: 44px;
  }

  #ac-app :is(button, a, input, select, textarea, summary),
  #sb :is(button, a, input, select, textarea) {
    touch-action: manipulation;
  }
}

@media (max-width: 900px) {
  body:has(#ac-root:not([hidden]) .side.open) {
    overflow: hidden;
  }

  #ac-app {
    --ac-coach-room: min(260px, 40dvh);
  }

  #ac-app .side {
    height: 100vh;
    height: 100dvh;
    padding-bottom: max(24px, env(safe-area-inset-bottom, 0px));
    overscroll-behavior-y: contain;
  }

  #ac-app .top {
    gap: 10px;
  }

  #ac-app .mission .gl {
    padding-block: 2px 6px;
    scrollbar-width: thin;
    overscroll-behavior-x: contain;
  }

  #ac-app .mission .gl::-webkit-scrollbar {
    display: block;
    height: 3px;
  }

  #ac-app .coach {
    max-height: 260px;
    max-height: var(--ac-coach-room);
    overflow-y: auto;
    overscroll-behavior-y: contain;
  }

  #ac-app .coach-h {
    position: sticky;
    top: 0;
    background: var(--bo-surface);
  }

  #ac-app .coach p {
    line-height: 1.55;
  }

  #ac-app .coach .acts .btn {
    flex: 1 1 110px;
  }

  #ac-app:has(.coach) .page {
    padding-bottom: calc(var(--ac-coach-room) + max(36px, env(safe-area-inset-bottom, 0px)));
  }

  #ac-app .modal {
    padding-top: max(8px, env(safe-area-inset-top, 0px));
  }

  #ac-app .mcard {
    max-height: 100%;
  }

  #ac-app .mhead,
  #ac-app .mbody,
  #ac-app .mfoot,
  #ac-app .ac-lesson-dialog :is(.mhead, .mbody, .mfoot) {
    padding-left: max(16px, env(safe-area-inset-left, 0px));
    padding-right: max(16px, env(safe-area-inset-right, 0px));
  }

  #ac-app .mfoot {
    padding-bottom: max(16px, env(safe-area-inset-bottom, 0px));
  }

  #sb .card {
    max-height: calc(100vh - max(8px, env(safe-area-inset-top, 0px)));
    max-height: calc(100dvh - max(8px, env(safe-area-inset-top, 0px)));
    overscroll-behavior-y: contain;
  }
}

@media (max-width: 600px) {
  #ac-app .title {
    padding-block: 24px 40px;
  }

  #ac-app .t-hero {
    margin-top: 28px;
  }

  #ac-app .card {
    padding: 16px;
  }

  /* A few later-level screens set desktop columns inline. */
  #ac-app .row2 {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  #ac-app .pdca {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }

  #ac-app .rung {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 7px 10px;
    padding: 13px 12px;
  }

  #ac-app .rung .n {
    grid-row: 1 / span 2;
  }

  #ac-app .rung > :last-child {
    grid-column: 2;
    justify-self: start;
  }

  #ac-app .rung b {
    line-height: 1.3;
  }

  #ac-app .rung small {
    line-height: 1.5;
  }

  #ac-app .mission {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding-block: 12px;
  }

  #ac-app .mission .lvl {
    grid-column: 1 / -1;
  }

  #ac-app .mission > .btn {
    width: 100%;
  }

  #ac-app .cal-m .per {
    grid-template-columns: 36px minmax(0, 1fr);
  }

  #ac-app .cal-m .per > span {
    font-size: .72rem;
    letter-spacing: .04em;
  }

  #ac-app .cal-m :is(.ev, .add) {
    padding: 10px;
    font-size: .84rem;
  }

  #ac-app .cal-m .ev b {
    font-size: .88rem;
  }

  #ac-app .mfoot .sp {
    display: none;
  }

  #ac-app .mfoot .btn {
    flex: 1 1 120px;
  }

  #ac-app .ac-lesson-dialog .mhead {
    padding-block: 14px 12px;
  }

  #ac-app .ac-lesson-dialog .mbody {
    padding-top: 14px;
  }

  #ac-app .ac-lesson-dialog .mfoot {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  #ac-app .ac-lesson-dialog .mfoot .btn:only-of-type,
  #ac-app .ac-lesson-dialog .mfoot .btn:nth-of-type(3) {
    grid-column: 1 / -1;
  }

  #ac-app .ac-lesson-prose {
    font-size: 1rem;
    line-height: 1.7;
  }

  #ac-app :is(.ac-lesson-points dd, .ac-lesson-example, .ac-lesson-action, .ac-lesson-objective) {
    font-size: .92rem;
  }

  #ac-app .ac-lesson-card h3,
  #ac-app .ac-lesson-check h3 {
    font-size: clamp(1.35rem, 5.2vw, 1.65rem);
  }

  #ac-app .ac-lesson-results {
    grid-template-columns: minmax(0, 1fr);
  }

  #ac-app .ac-lesson-results > div {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 13px 15px;
  }

  #ac-app .ac-lesson-results > div + div {
    border-left: 0;
    border-top: 1px solid var(--bo-line);
  }

  #sb .bar-in {
    flex-wrap: wrap;
  }

  #sb main {
    padding-bottom: calc(160px + env(safe-area-inset-bottom, 0px));
  }

  #sb .bar-in > .go {
    flex: 1 1 auto;
  }
}

@media (max-width: 480px) {
  #ac-app .t-foot > .btn {
    width: 100%;
  }

  #ac-app .step {
    grid-template-columns: 28px minmax(0, 1fr);
  }

  #ac-app .step > .tag {
    grid-column: 2;
    justify-self: start;
  }

  #ac-app .mrow {
    grid-template-columns: minmax(0, 1fr) 44px;
  }

  #ac-app .mrow > select {
    grid-column: 1 / -1;
  }

  #ac-app .kv {
    grid-template-columns: 80px minmax(0, 1fr);
  }

  #sb .specs {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* In landscape, let the game toolbar scroll away to leave room for the task. */
@media (max-height: 500px) and (max-width: 1000px) {
  #ac-app .top,
  #sb .hud {
    position: relative;
    top: auto;
  }

  #ac-app .mhead,
  #ac-app .ac-lesson-dialog .mhead {
    padding-block: 10px;
  }

  #ac-app .mfoot {
    padding-top: 8px;
    padding-bottom: max(8px, env(safe-area-inset-bottom, 0px));
  }

  #ac-app .coach {
    padding-block: 8px;
  }
}