body {
  overflow: hidden;
}

button,
.command-result {
  background: transparent;
  cursor: pointer;
}

.console-app {
  display: grid;
  width: 100%;
  height: 100svh;
  grid-template-columns: 4.75rem minmax(0, 1fr);
  grid-template-rows: 4rem minmax(0, 1fr) 7.75rem;
}

.mast {
  z-index: 10;
  display: grid;
  grid-column: 1 / 3;
  grid-template-columns: 4.75rem minmax(0, 1fr) auto auto auto;
  min-width: 0;
  border-bottom: 1px solid var(--line-strong);
  background: var(--canvas);
}

.course-mark {
  display: grid;
  place-items: center;
  border-right: 1px solid var(--line-strong);
  color: var(--accent-strong);
}

.course-logo {
  width: 1.8rem;
  height: 1.8rem;
  background: var(--accent-strong);
  -webkit-mask: url("../logo/syntax-monument-mark.svg") center / contain no-repeat;
  mask: url("../logo/syntax-monument-mark.svg") center / contain no-repeat;
}

.crumb,
.view-switch,
.mast-action {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.crumb {
  min-width: 0;
  overflow: hidden;
  padding: 0 1.4rem;
  color: var(--dim);
  line-height: 4rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.view-switch {
  display: flex;
  border-left: 1px solid var(--line-strong);
}

.view-switch a,
.mast-action {
  display: grid;
  min-width: 4.5rem;
  place-items: center;
  padding: 0 0.9rem;
  border-left: 1px solid var(--line);
  color: var(--muted);
  text-decoration: none;
}

.view-switch a:first-child {
  border-left: 0;
}

.view-switch a[aria-current="page"] {
  background: var(--accent);
  color: var(--ink);
}

.view-switch a:hover,
.mast-action:hover,
.mast-action[aria-pressed="true"] {
  background: var(--panel-raised);
  color: var(--ink);
}

.mast-action {
  border-right: 0;
  border-top: 0;
  border-bottom: 0;
}

.signal-rail {
  display: flex;
  min-height: 0;
  grid-column: 1;
  grid-row: 2 / 4;
  flex-direction: column;
  align-items: stretch;
  border-right: 1px solid var(--line-strong);
}

.rail-word {
  align-self: center;
  padding: 1.1rem 0 1.35rem;
  color: var(--muted);
  font: 600 0.6rem var(--font-mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transform: rotate(180deg);
  writing-mode: vertical-rl;
}

.phase-signals {
  display: flex;
  flex: 1;
  flex-direction: column;
}

.phase-signal {
  position: relative;
  min-height: 2.8rem;
  flex: 1;
  color: var(--muted);
  font: 600 0.68rem var(--font-mono);
}

.phase-signal::after {
  position: absolute;
  top: 50%;
  right: 0.8rem;
  width: 0.25rem;
  height: 0.25rem;
  content: "";
  background: var(--line-strong);
}

.phase-signal.is-through::after {
  background: var(--accent-strong);
}

.phase-signal.is-current {
  background: var(--accent);
  color: var(--ink);
}

.phase-signal.is-current::after {
  width: 100%;
  height: 1px;
  right: 0;
  background: var(--accent-strong);
}

.phase-signal.is-sealed {
  color: var(--quiet-strong);
}

.phase-signal:hover {
  background: var(--panel-raised);
  color: var(--ink);
}

.course-readout {
  display: grid;
  min-height: 4.5rem;
  place-items: center;
  align-content: center;
  border-top: 1px solid var(--line-strong);
  color: var(--muted);
  font: 600 0.55rem var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.course-readout strong {
  color: var(--accent-strong);
  font-size: 1.05rem;
}

.stage {
  display: grid;
  min-width: 0;
  min-height: 0;
  grid-column: 2;
  grid-row: 2;
  grid-template-columns: minmax(0, 1fr) minmax(17rem, 23vw);
  overflow: hidden;
}

.primary-plane {
  min-width: 0;
  min-height: 0;
  overflow: auto;
  scrollbar-color: var(--line-strong) var(--canvas);
}

.lesson-head {
  position: relative;
  display: grid;
  min-height: 14.5rem;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 2rem;
  overflow: hidden;
  padding: 2rem clamp(1.25rem, 3vw, 3rem);
  border-bottom: 1px solid var(--line-strong);
}

.lesson-copy-head,
.lesson-instrument {
  position: relative;
  z-index: 2;
}

.kicker,
.plane-label,
.margin-label,
.margin-title {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.kicker {
  margin-bottom: 0.9rem;
  color: var(--accent-strong);
}

.lesson-head h1 {
  max-width: 11ch;
  margin: 0;
  font: 700 clamp(3.1rem, 6vw, 7rem) / 0.76 var(--font-display);
  letter-spacing: -0.072em;
  text-transform: uppercase;
}

.lesson-instrument {
  display: flex;
  min-width: 10rem;
  align-self: stretch;
  flex-direction: column;
  align-items: flex-end;
  justify-content: space-between;
}

.duration {
  color: var(--muted);
  font: 600 0.6rem var(--font-mono);
  letter-spacing: 0.12em;
  text-align: right;
  text-transform: uppercase;
}

.duration strong {
  display: block;
  color: var(--ink);
  font: 500 3rem/0.9 var(--font-display);
  letter-spacing: -0.06em;
}

.mode-switch {
  display: flex;
  gap: 1rem;
}

.mode-switch button {
  padding: 0.3rem 0;
  border-bottom: 1px solid transparent;
  color: var(--muted);
  font: 600 0.65rem var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.mode-switch button[aria-pressed="true"] {
  border-color: var(--accent-strong);
  color: var(--accent-strong);
}

.lesson-ghost {
  position: absolute;
  z-index: 1;
  top: -2.9rem;
  right: 0.5rem;
  color: color-mix(in srgb, var(--surface) 30%, var(--canvas));
  font: 700 clamp(8rem, 17vw, 15rem)/1 var(--font-display);
  letter-spacing: -0.1em;
}

.workspace-mode {
  min-height: calc(100% - 14.5rem);
}

.plane-label {
  display: flex;
  min-height: 2.6rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 1.25rem;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.plane-label em {
  color: var(--accent-strong);
  font-style: normal;
  text-align: right;
}

.build-surface {
  background: color-mix(in srgb, var(--surface) 12%, var(--canvas));
}

.code-surface {
  padding: 1.2rem 0 4rem;
  overflow-x: auto;
}

.code-line {
  display: grid;
  width: 100%;
  min-width: max-content;
  grid-template-columns: 3.7rem 1fr;
  padding: 0.2rem 1.25rem;
  color: var(--dim);
  text-align: left;
}

.code-line:hover,
.code-line.is-linked {
  background: var(--accent-wash);
  color: var(--ink);
}

.line-number {
  color: var(--muted);
  font-family: var(--code-font);
  font-size: 0.78rem;
  user-select: none;
}

.code-line code {
  font: 0.84rem/1.65 var(--code-font);
  white-space: pre;
}

.read-surface {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(17rem, 0.8fr);
  gap: clamp(2rem, 5vw, 5rem);
  padding: clamp(1.5rem, 4vw, 4rem);
}

.read-surface .plane-label {
  padding-inline: 0;
  border-top: 1px solid var(--line);
}

.read-lead {
  max-width: 42rem;
  margin: 2rem 0;
  font: 500 clamp(1.5rem, 2.6vw, 2.6rem)/1.08 var(--font-display);
  letter-spacing: -0.035em;
}

.read-copy p {
  max-width: 44rem;
  margin: 0 0 1.1rem;
  color: var(--dim);
  font-size: 1.05rem;
}

.read-surface blockquote {
  align-self: center;
  margin: 0;
  padding-left: 1.25rem;
  border-left: 0.45rem solid var(--accent-strong);
  font: 600 clamp(1.8rem, 3.5vw, 3.4rem)/0.98 var(--font-display);
  letter-spacing: -0.045em;
}

.test-grid {
  display: grid;
  min-height: 25rem;
  grid-template-columns: repeat(4, 1fr);
}

.test-cell {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem;
  border-right: 1px solid var(--line-strong);
}

.test-cell:last-child {
  border-right: 0;
}

.test-cell strong {
  color: var(--accent-strong);
  font: 600 clamp(2.7rem, 5vw, 5rem)/0.8 var(--font-display);
}

.test-cell span {
  color: var(--muted);
  font: 600 0.68rem/1.4 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.test-cell.is-pending strong,
.test-cell.is-pending span {
  color: var(--quiet-strong);
}

.lesson-margin {
  display: flex;
  min-width: 0;
  min-height: 0;
  flex-direction: column;
  overflow: auto;
  border-left: 1px solid var(--line-strong);
  background: color-mix(in srgb, var(--surface) 8%, var(--canvas));
}

.margin-title,
.margin-section,
.field-checks {
  padding: 1.2rem;
  border-bottom: 1px solid var(--line);
}

.margin-title,
.margin-label {
  color: var(--muted);
}

.margin-section h2 {
  margin: 0.75rem 0;
  font: 600 1.4rem/1 var(--font-display);
  letter-spacing: -0.035em;
}

.margin-section p {
  margin: 0;
  color: var(--dim);
  font-size: 0.88rem;
}

.lesson-topology {
  display: flex;
  margin: 1rem 0;
}

.topology-node {
  position: relative;
  display: grid;
  height: 1.8rem;
  flex: 1;
  place-items: center;
  border-top: 1px solid var(--line-strong);
  color: var(--muted);
  font: 600 0.58rem var(--font-mono);
}

.topology-node.is-complete {
  border-color: var(--accent-strong);
  color: var(--accent-strong);
}

.topology-node.is-current {
  background: var(--accent);
  color: var(--ink);
}

.field-checks {
  padding-inline: 0;
}

.field-checks > .margin-label {
  display: block;
  padding: 0 1.2rem 1rem;
}

.field-check {
  display: grid;
  width: 100%;
  min-height: 4.6rem;
  grid-template-columns: 2.2rem 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.75rem 1.2rem;
  border-top: 1px solid var(--line);
  text-align: left;
}

.field-check:last-child {
  border-bottom: 1px solid var(--line);
}

.field-check:hover,
.field-check.is-linked {
  background: var(--accent-wash);
}

.field-check-index,
.field-check-state {
  color: var(--accent-strong);
  font: 600 0.65rem var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.field-check-copy strong,
.field-check-copy span {
  display: block;
}

.field-check-copy strong {
  font-size: 0.86rem;
}

.field-check-copy span {
  margin-top: 0.2rem;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.7rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.margin-next {
  display: flex;
  min-height: 4.2rem;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding: 1rem 1.2rem;
  border-top: 1px solid var(--line-strong);
  font-weight: 700;
  text-align: left;
  text-transform: uppercase;
}

.margin-next:hover {
  background: var(--accent);
}

.sequencer {
  display: grid;
  min-width: 0;
  grid-column: 2;
  grid-row: 3;
  grid-template-columns: 10rem minmax(0, 1fr) 10.5rem;
  border-top: 1px solid var(--line-strong);
  background: var(--canvas);
}

.sequence-label {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1rem 1.25rem;
  border-right: 1px solid var(--line-strong);
}

.sequence-label strong,
.sequence-label span {
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.sequence-label strong {
  font-size: 0.8rem;
}

.sequence-label span {
  margin-top: 0.3rem;
  color: var(--muted);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
}

.sequence-track {
  display: grid;
  min-width: 0;
  grid-auto-columns: minmax(8.5rem, 1fr);
  grid-auto-flow: column;
  overflow-x: auto;
}

.sequence-step {
  position: relative;
  min-width: 0;
  padding: 1rem 0.8rem;
  overflow: hidden;
  border-right: 1px solid var(--line);
  text-align: left;
}

.sequence-step::before {
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 0.2rem;
  content: "";
  background: transparent;
}

.sequence-step.is-complete::before {
  background: var(--accent-through);
}

.sequence-step.is-current::before {
  background: var(--accent-strong);
}

.sequence-step small,
.sequence-step strong {
  display: block;
}

.sequence-step small {
  margin-bottom: 0.5rem;
  color: var(--muted);
  font: 600 0.55rem var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sequence-step strong {
  font-size: 0.78rem;
  line-height: 1.2;
}

.sequence-step:hover,
.sequence-step.is-current {
  background: var(--panel);
}

.sequence-step.is-current strong {
  color: var(--accent-strong);
}

.complete-action {
  display: grid;
  grid-template-columns: 1fr auto;
  align-content: center;
  padding: 1rem;
  background: var(--accent);
  color: var(--ink);
  text-align: left;
}

.complete-action span,
.complete-action strong {
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.complete-action span {
  grid-column: 1 / 3;
  font-size: 0.58rem;
  letter-spacing: 0.1em;
}

.complete-action strong {
  margin-top: 0.35rem;
  font-size: 0.9rem;
}

.complete-action b {
  align-self: end;
  font-size: 1.7rem;
}

.complete-action:hover {
  background: var(--accent-strong);
  color: var(--ink);
}

.command-plane {
  position: fixed;
  z-index: 100;
  inset: 0;
  display: grid;
  grid-template-rows: 4rem 1fr;
  background: var(--canvas);
  opacity: 0;
  pointer-events: none;
  transform: translateY(2rem);
  visibility: hidden;
  transition: transform 180ms ease, opacity 180ms ease;
}

.command-plane.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: none;
  visibility: visible;
}

.command-bar {
  display: grid;
  grid-template-columns: 4.75rem 1fr auto;
  border-bottom: 1px solid var(--line-strong);
}

.command-symbol {
  display: grid;
  place-items: center;
  border-right: 1px solid var(--line-strong);
  color: var(--accent-strong);
  font: 600 1.5rem var(--font-mono);
}

.command-bar input {
  min-width: 0;
  padding: 0 1.5rem;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: 500 clamp(1rem, 2vw, 1.5rem) var(--font-display);
  outline: 0;
}

.command-bar button {
  padding: 0 1.5rem;
  border-left: 1px solid var(--line-strong);
  font: 600 0.68rem var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.command-results {
  overflow: auto;
  padding: clamp(1.5rem, 4vw, 4rem) clamp(1rem, 5vw, 5rem);
}

.command-result {
  display: grid;
  width: 100%;
  grid-template-columns: 5rem 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.command-result:first-child {
  border-top: 1px solid var(--line);
}

.command-result em,
.command-result span {
  color: var(--muted);
  font: 600 0.65rem var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.command-result em {
  color: var(--accent-strong);
  font-style: normal;
}

.command-result strong {
  font: 600 clamp(1.25rem, 2.8vw, 2.5rem)/1 var(--font-display);
  letter-spacing: -0.04em;
}

.command-result:hover:not([aria-disabled="true"]) {
  padding-left: 1rem;
  background: var(--panel-raised);
  color: var(--ink);
}

.command-result[aria-disabled="true"] {
  color: var(--quiet-strong);
  cursor: not-allowed;
}

.focus-mode .console-app {
  grid-template-columns: minmax(0, 1fr);
}

.focus-mode .signal-rail,
.focus-mode .lesson-margin {
  display: none;
}

.focus-mode .mast,
.focus-mode .stage,
.focus-mode .sequencer {
  grid-column: 1;
}

.focus-mode .mast {
  grid-template-columns: 4.75rem minmax(0, 1fr) auto auto auto;
}

.focus-mode .stage {
  grid-template-columns: minmax(0, 1fr);
}

@media (max-width: 1000px) {
  .mast { grid-template-columns: 4.75rem minmax(0, 1fr) auto auto; }
  .view-switch { display: none; }
  .stage { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto auto; overflow: auto; }
  .primary-plane { min-height: 36rem; overflow: visible; }
  .lesson-margin { min-height: 24rem; overflow: visible; border-top: 1px solid var(--line-strong); border-left: 0; }
  .field-checks { display: grid; grid-template-columns: repeat(2, 1fr); }
  .field-checks > .margin-label { grid-column: 1 / 3; }
  .margin-next { margin-top: 0; }
  .test-grid { grid-template-columns: repeat(2, 1fr); }
  .test-cell { min-height: 13rem; border-bottom: 1px solid var(--line); }
  .sequencer { grid-template-columns: 8rem minmax(0, 1fr) 9rem; }
}

@media (max-width: 700px) {
  .console-app { grid-template-columns: minmax(0, 1fr); grid-template-rows: 3.5rem minmax(0, 1fr) 7rem; }
  .mast { grid-column: 1; grid-template-columns: 3.5rem minmax(0, 1fr) auto; }
  .signal-rail, #focus-toggle { display: none; }
  .crumb { padding-inline: 0.8rem; line-height: 3.5rem; }
  .mast-action { min-width: auto; padding-inline: 0.8rem; }
  .stage { grid-column: 1; }
  .lesson-head { min-height: 13rem; grid-template-columns: 1fr; gap: 1rem; padding: 1.4rem 1rem; }
  .lesson-head h1 { font-size: clamp(3rem, 15vw, 5rem); }
  .lesson-instrument { min-width: 0; flex-direction: row; align-items: end; }
  .duration { text-align: left; }
  .duration strong { font-size: 2rem; }
  .lesson-ghost { display: none; }
  .read-surface { grid-template-columns: 1fr; }
  .field-checks { grid-template-columns: 1fr; }
  .field-checks > .margin-label { grid-column: 1; }
  .sequencer { grid-column: 1; grid-template-columns: minmax(0, 1fr) 8.5rem; }
  .sequence-label { display: none; }
  .sequence-track { scroll-snap-type: x mandatory; }
  .sequence-step { min-width: 9rem; scroll-snap-align: center; }
  .complete-action { padding: 0.75rem; }
  .command-bar { grid-template-columns: 3.5rem 1fr auto; }
  .command-bar button { padding-inline: 0.8rem; }
  .command-result { grid-template-columns: 3rem 1fr; }
  .command-result span { grid-column: 2; }
}