.builder-shell {
  min-width: 320px;
}

.builder-header {
  position: sticky;
  z-index: 20;
  top: 0;
}

.header-actions,
.workspace-tools,
.runtime-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  min-width: 0;
  max-width: 100%;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  color: var(--text);
  background: var(--surface-raised);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 720;
  text-decoration: none;
  transition: border-color 140ms ease, background 140ms ease, transform 140ms ease;
}

.button:hover,
.button:focus-visible {
  border-color: var(--mint);
  outline: none;
  transform: translateY(-1px);
}

.button:disabled {
  cursor: wait;
  opacity: 0.55;
  transform: none;
}

.button--primary {
  border-color: rgb(101 242 191 / 55%);
  color: #06130f;
  background: var(--mint);
}

.button--ghost {
  background: rgb(255 255 255 / 3%);
}

.button--danger {
  border-color: rgb(255 123 115 / 35%);
  color: var(--danger);
  background: rgb(255 123 115 / 7%);
}

.button--full {
  width: 100%;
}

.file-button input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
}

.builder-layout {
  --control-panel-width: 430px;

  display: grid;
  grid-template-columns: minmax(0, 1fr) 12px var(--control-panel-width);
  min-height: calc(100vh - 65px);
}

.scene-workspace {
  min-width: 0;
  padding: clamp(22px, 3vw, 42px);
}

.workspace-heading,
.source-strip-heading,
.asset-shelf {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

.workspace-heading {
  margin-bottom: 22px;
}

.workspace-heading h1 {
  margin-bottom: 0;
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  letter-spacing: -0.055em;
}

.workspace-heading .eyebrow {
  margin-bottom: 7px;
}

.canvas-card {
  position: relative;
  overflow: hidden;
  min-height: 520px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #0a1512;
  box-shadow: var(--shadow);
}

#scene-canvas {
  display: block;
  width: 100%;
  height: clamp(520px, 61vh, 720px);
  cursor: crosshair;
  touch-action: none;
}

.canvas-empty {
  position: absolute;
  top: 34px;
  left: 50%;
  display: grid;
  width: min(430px, calc(100% - 48px));
  gap: 7px;
  color: var(--muted);
  text-align: center;
  pointer-events: none;
  transform: translateX(-50%);
}

.canvas-empty strong {
  color: #cfe2db;
  font-size: 0.95rem;
}

.canvas-empty strong,
.canvas-empty span {
  overflow-wrap: anywhere;
}

.canvas-empty.is-hidden {
  display: none;
}

.canvas-badge {
  position: absolute;
  right: 14px;
  bottom: 14px;
  padding: 7px 10px;
  border: 1px solid rgb(255 255 255 / 10%);
  border-radius: 999px;
  color: #d7e8e2;
  background: rgb(8 17 15 / 78%);
  backdrop-filter: blur(10px);
  font: 650 0.72rem ui-monospace, SFMono-Regular, Consolas, monospace;
  pointer-events: none;
  overflow: hidden;
  max-width: calc(100% - 28px);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-strip-heading {
  margin-top: 32px;
}

.source-actions {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.source-strip-heading h2,
.asset-shelf h2 {
  margin-bottom: 5px;
  font-size: 1rem;
}

.source-strip-heading p,
.asset-shelf p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
}

.source-strip {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 11px;
  margin-top: 13px;
}

.source-card {
  display: grid;
  gap: 10px;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 15px;
  color: inherit;
  background: rgb(255 255 255 / 2%);
  text-align: left;
  cursor: pointer;
}

.source-card:hover,
.source-card:focus-visible,
.source-card.is-selected {
  border-color: var(--source-color, var(--mint));
  outline: none;
  background: rgb(255 255 255 / 5%);
}

.source-card__heading {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 8px;
}

.source-card__dot {
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--source-color, var(--mint));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--source-color, var(--mint)) 16%, transparent);
}

.source-card strong {
  min-width: 0;
  overflow-wrap: anywhere;
}

.source-card small {
  min-width: 0;
  color: var(--muted);
  font: 600 0.72rem ui-monospace, SFMono-Regular, Consolas, monospace;
  overflow-wrap: anywhere;
}

.asset-shelf {
  align-items: flex-start;
  margin-top: 28px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgb(255 255 255 / 2%);
}

.asset-shelf > div:first-child {
  max-width: 470px;
}

.asset-list {
  display: flex;
  flex: 1 1 320px;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.asset-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 100%;
  padding: 8px 9px 8px 11px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--surface);
}

.asset-chip__label {
  min-width: 0;
  max-width: min(320px, 50vw);
  font-size: 0.74rem;
  overflow-wrap: anywhere;
}

.asset-chip__state {
  color: var(--muted);
  font-size: 0.66rem;
}

.asset-chip__remove {
  display: grid;
  width: 23px;
  height: 23px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  place-items: center;
  color: var(--muted);
  background: rgb(255 255 255 / 5%);
  cursor: pointer;
}

.asset-chip__remove:disabled {
  cursor: not-allowed;
  opacity: 0.35;
}

.control-panel {
  position: sticky;
  top: 65px;
  min-width: 0;
  align-self: start;
  overflow-y: auto;
  max-height: calc(100vh - 65px);
  padding: 18px;
  border-left: 1px solid var(--line);
  background: rgb(12 24 21 / 86%);
  backdrop-filter: blur(18px);
  container-name: builder-controls;
  container-type: inline-size;
}

.builder-layout > .split-handle {
  position: sticky;
  top: 59px;
  height: calc(100vh - 59px);
  align-self: start;
}

.runtime-line {
  justify-content: space-between;
  margin-bottom: 12px;
}

.save-state {
  min-width: 0;
  color: var(--muted);
  font-size: 0.7rem;
  overflow-wrap: anywhere;
}

.control-section,
.validation-card {
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgb(255 255 255 / 2%);
}

.control-section + .control-section,
.validation-card {
  margin-top: 12px;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 14px;
}

.section-title > span {
  color: var(--mint);
  font: 750 0.68rem ui-monospace, SFMono-Regular, Consolas, monospace;
}

.section-title h2 {
  margin: 0;
  font-size: 0.9rem;
}

.field {
  display: grid;
  min-width: 0;
  gap: 6px;
}

.field > span {
  color: var(--muted);
  font-size: 0.69rem;
  font-weight: 650;
}

.field input,
.field select {
  width: 100%;
  min-height: 38px;
  padding: 8px 9px;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--text);
  background: #0b1714;
}

.field input:focus,
.field select:focus {
  border-color: var(--mint);
  outline: 2px solid rgb(101 242 191 / 11%);
}

.field input:disabled,
.field select:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.check-field {
  display: flex;
  align-items: center;
  align-self: end;
  min-height: 38px;
  gap: 8px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 650;
}

.check-field input {
  width: 17px;
  height: 17px;
  accent-color: var(--mint);
}

.field--wide + .field--wide,
.field-grid + .field--wide,
.field--wide + .field-grid,
#tone-fields,
#noise-fields,
#asset-fields,
.button--full {
  margin-top: 10px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.field-grid--three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.inline-note {
  padding: 12px;
  border: 1px dashed var(--line);
  border-radius: 10px;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
}

.section-note {
  margin: 11px 0 0;
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.5;
}

.trajectory-editor {
  margin: 12px 0;
  padding: 12px;
  border: 1px solid rgb(101 242 191 / 16%);
  border-radius: 12px;
  background: rgb(101 242 191 / 3%);
}

.trajectory-toggle {
  min-height: 28px;
}

.trajectory-preview {
  margin-top: 12px;
}

.trajectory-preview output {
  color: var(--mint);
  font: 700 0.7rem ui-monospace, SFMono-Regular, Consolas, monospace;
}

.trajectory-preview input[type="range"] {
  min-height: 28px;
  padding: 0;
  accent-color: var(--mint);
}

.trajectory-list {
  display: grid;
  gap: 8px;
  margin: 12px 0 10px;
}

.trajectory-row {
  display: grid;
  grid-template-columns: 42px repeat(4, minmax(0, 1fr)) 30px;
  gap: 5px;
  align-items: end;
}

.trajectory-row__select,
.trajectory-row__remove {
  min-height: 36px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: #0b1714;
  cursor: pointer;
}

.trajectory-row__select.is-selected {
  border-color: var(--mint);
  color: var(--mint);
}

.trajectory-row__remove:disabled {
  cursor: not-allowed;
  opacity: 0.3;
}

.trajectory-row .field > span {
  font-size: 0.6rem;
}

.trajectory-row .field input {
  min-height: 36px;
  padding: 6px;
}

.is-hidden {
  display: none !important;
}

.validation-card {
  display: flex;
  align-items: flex-start;
  gap: 11px;
}

.validation-card > :last-child {
  min-width: 0;
}

.validation-dot {
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--muted);
  box-shadow: 0 0 0 5px rgb(145 170 162 / 8%);
}

.validation-card strong {
  font-size: 0.82rem;
  overflow-wrap: anywhere;
}

.validation-card p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.validation-card.is-valid .validation-dot {
  background: var(--mint);
  box-shadow: 0 0 0 5px rgb(101 242 191 / 10%);
}

.validation-card.is-invalid .validation-dot {
  background: var(--danger);
  box-shadow: 0 0 0 5px rgb(255 123 115 / 10%);
}

@media (max-width: 1100px) {
  .builder-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .builder-layout > .split-handle {
    display: none;
  }

  .control-panel {
    position: static;
    max-height: none;
    border-top: 1px solid var(--line);
    border-left: 0;
  }
}

@media (max-width: 760px) {
  .builder-header,
  .workspace-heading,
  .source-strip-heading,
  .asset-shelf {
    align-items: stretch;
    flex-direction: column;
  }

  .builder-header {
    position: static;
  }

  .header-actions .button,
  .workspace-tools .button {
    min-width: 0;
    flex: 1 1 calc(50% - 5px);
  }

  .header-actions,
  .workspace-tools,
  .source-actions {
    width: 100%;
  }

  .source-actions .button {
    min-width: 0;
    flex: 1 1 calc(50% - 5px);
  }

  .scene-workspace {
    padding: 18px;
  }

  .canvas-card {
    min-height: 420px;
  }

  #scene-canvas {
    height: 420px;
  }

  .asset-list {
    justify-content: flex-start;
  }
}

@media (max-width: 430px) {
  .field-grid--three {
    grid-template-columns: 1fr;
  }

  .trajectory-row {
    grid-template-columns: 38px repeat(2, minmax(0, 1fr)) 30px;
  }

  .trajectory-row .field:nth-of-type(3),
  .trajectory-row .field:nth-of-type(4) {
    grid-row: 2;
  }
}

/* Task-first Builder navigation and progressive disclosure. */
.builder-header {
  min-height: 58px;
  padding-block: 9px;
  gap: 16px;
}

.builder-workflow {
  min-width: 0;
  margin-left: auto;
}

.builder-workflow ol {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.builder-workflow li {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 680;
  white-space: nowrap;
}

.builder-workflow li + li::before {
  width: 18px;
  height: 1px;
  margin: 0 7px;
  background: var(--line);
  content: "";
}

.builder-workflow li span {
  display: grid;
  width: 20px;
  height: 20px;
  border: 1px solid rgb(101 242 191 / 34%);
  border-radius: 50%;
  place-items: center;
  color: var(--mint);
  font: 750 0.6rem ui-monospace, SFMono-Regular, Consolas, monospace;
}

.header-more {
  position: relative;
}

.header-more > summary {
  list-style: none;
}

.header-more > summary::-webkit-details-marker,
.inline-disclosure > summary::-webkit-details-marker,
.section-summary::-webkit-details-marker,
.asset-help > summary::-webkit-details-marker {
  display: none;
}

.header-more__menu {
  position: absolute;
  z-index: 30;
  top: calc(100% + 8px);
  right: 0;
  display: grid;
  width: max-content;
  min-width: 210px;
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0b1714;
  box-shadow: 0 18px 48px rgb(0 0 0 / 35%);
}

.header-more__menu .button {
  width: 100%;
}

.builder-layout {
  min-height: calc(100vh - 59px);
}

.scene-workspace {
  padding: clamp(20px, 2.5vw, 34px);
}

.workspace-heading {
  margin-bottom: 16px;
}

.workspace-heading h1 {
  font-size: clamp(1.55rem, 3vw, 2.35rem);
}

.source-strip-heading .eyebrow {
  margin-bottom: 5px;
  font-size: 0.64rem;
}

.source-strip-heading {
  margin-top: 24px;
}

.asset-shelf {
  align-items: center;
  margin-top: 20px;
  padding: 14px 16px;
}

.asset-help {
  color: var(--muted);
  font-size: 0.7rem;
}

.asset-help summary {
  width: fit-content;
  margin-top: 4px;
  color: var(--mint);
  cursor: pointer;
}

.asset-help p {
  max-width: 520px;
  margin-top: 9px;
}

.control-panel {
  top: 59px;
  max-height: calc(100vh - 59px);
  padding: 14px;
}

.control-section--primary {
  border-color: rgb(101 242 191 / 28%);
  background: rgb(101 242 191 / 3%);
}

.validation-card {
  margin-top: 0;
  margin-bottom: 12px;
  padding: 13px 15px;
}

.control-section + .validation-card {
  margin-top: 12px;
}

.inline-disclosure {
  margin-top: 12px;
  border-top: 1px solid var(--line);
}

.inline-disclosure > summary {
  padding: 12px 0 0;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 700;
}

.inline-disclosure > summary::after {
  float: right;
  color: var(--mint);
  content: "+";
}

.inline-disclosure[open] > summary::after {
  content: "−";
}

.disclosure-section {
  padding: 0;
}

.section-summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 9px;
  padding: 15px 17px;
  cursor: pointer;
  list-style: none;
}

.section-summary > span {
  color: var(--mint);
  font: 750 0.62rem ui-monospace, SFMono-Regular, Consolas, monospace;
}

.section-summary > strong {
  font-size: 0.82rem;
}

.section-summary > small {
  color: var(--muted);
  font-size: 0.62rem;
}

.disclosure-section[open] {
  padding: 0 17px 17px;
}

.disclosure-section[open] .section-summary {
  margin: 0 -17px 14px;
  border-bottom: 1px solid var(--line);
}

@media (max-width: 1180px) {
  .builder-workflow li {
    font-size: 0;
    gap: 0;
  }

  .builder-workflow li + li::before {
    width: 12px;
    margin-inline: 5px;
  }
}

@media (max-width: 1100px) {
  .builder-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .builder-layout > .split-handle {
    display: none;
  }

  .control-panel {
    position: static;
    max-height: none;
    border-top: 1px solid var(--line);
    border-left: 0;
  }
}

@media (max-width: 760px) {
  .builder-header {
    gap: 10px;
  }

  .builder-workflow {
    order: 3;
    width: 100%;
    margin: 0;
  }

  .builder-workflow ol {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .builder-workflow li {
    display: grid;
    grid-template-columns: 20px minmax(0, 1fr);
    gap: 5px;
    font-size: 0.64rem;
  }

  .builder-workflow li + li::before {
    display: none;
  }

  .header-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .header-actions > .button,
  .header-actions > .header-more,
  .header-more > summary {
    width: 100%;
  }

  .header-more__menu {
    top: calc(100% + 6px);
  }

  .asset-shelf {
    align-items: stretch;
  }
}

@media (max-width: 430px) {
  .builder-header,
  .scene-workspace,
  .control-panel {
    padding-inline: 14px;
  }

  .builder-workflow li {
    grid-template-columns: 18px minmax(0, 1fr);
    font-size: 0.59rem;
  }

  .builder-workflow li span {
    width: 18px;
    height: 18px;
  }

  .header-actions {
    gap: 6px;
  }

  .header-actions .button {
    min-height: 36px;
    padding-inline: 7px;
    font-size: 0.72rem;
  }

  .header-more__menu {
    right: -2px;
    min-width: 190px;
  }

  .canvas-card {
    min-height: 360px;
  }

  #scene-canvas {
    height: 360px;
  }

  .workspace-tools .button,
  .source-actions .button {
    font-size: 0.74rem;
  }

  .trajectory-row {
    grid-template-columns: 34px repeat(2, minmax(0, 1fr)) 30px;
    grid-template-rows: repeat(2, auto);
  }

  .trajectory-row__select,
  .trajectory-row__remove {
    grid-row: 1 / 3;
    align-self: stretch;
  }

  .trajectory-row .field:nth-of-type(1) {
    grid-column: 2;
    grid-row: 1;
  }

  .trajectory-row .field:nth-of-type(2) {
    grid-column: 3;
    grid-row: 1;
  }

  .trajectory-row .field:nth-of-type(3) {
    grid-column: 2;
    grid-row: 2;
  }

  .trajectory-row .field:nth-of-type(4) {
    grid-column: 3;
    grid-row: 2;
  }

  .trajectory-row__remove {
    grid-column: 4;
  }
}

@container builder-controls (max-width: 440px) {
  .field-grid--three {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .trajectory-row {
    grid-template-columns: 34px repeat(2, minmax(0, 1fr)) 30px;
    grid-template-rows: repeat(2, auto);
  }

  .trajectory-row__select,
  .trajectory-row__remove {
    grid-row: 1 / 3;
    align-self: stretch;
  }

  .trajectory-row .field:nth-of-type(1) {
    grid-column: 2;
    grid-row: 1;
  }

  .trajectory-row .field:nth-of-type(2) {
    grid-column: 3;
    grid-row: 1;
  }

  .trajectory-row .field:nth-of-type(3) {
    grid-column: 2;
    grid-row: 2;
  }

  .trajectory-row .field:nth-of-type(4) {
    grid-column: 3;
    grid-row: 2;
  }

  .trajectory-row__remove {
    grid-column: 4;
  }
}

@container builder-controls (max-width: 340px) {
  .field-grid--three {
    grid-template-columns: minmax(0, 1fr);
  }
}