@layer reset, base, layout, components, responsive;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html { color-scheme: dark; }
  body, h1, h2, h3, p, fieldset { margin: 0; }
  button, input, select { font: inherit; }
  button, select, input[type="range"] { touch-action: manipulation; }
  button { color: inherit; }
  canvas { display: block; }
  [hidden] { display: none !important; }
}

@layer base {
  :root {
    --ink: #e7eee9;
    --muted: #839089;
    --ghost: #4f5b55;
    --void: #080b0d;
    --black: #050708;
    --panel: #0d1214;
    --raised: #12191b;
    --line: #243034;
    --line-hot: #3b4b4e;
    --acid: #c7ff38;
    --cyan: #65f3e7;
    --amber: #ffb84f;
    --danger: #ff6f68;
    --mono: "SFMono-Regular", "Cascadia Code", "Roboto Mono", Consolas, monospace;
    --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-family: var(--sans);
    font-synthesis: none;
  }

  html, body { min-width: 300px; min-height: 100%; }
  body {
    overflow: hidden;
    background:
      radial-gradient(circle at 75% 0%, rgba(101, 243, 231, .055), transparent 28rem),
      var(--void);
    color: var(--ink);
  }

  ::selection { background: var(--acid); color: var(--black); }
  :focus-visible { outline: 2px solid var(--acid); outline-offset: 2px; }
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
  .skip-link {
    position: fixed;
    z-index: 100;
    top: 6px;
    left: 6px;
    padding: 8px 11px;
    background: var(--acid);
    color: var(--black);
    font: 700 11px var(--mono);
    transform: translateY(-150%);
  }
  .skip-link:focus { transform: none; }
  .eyebrow, .header-tag {
    color: var(--cyan);
    font: 700 9px/1.2 var(--mono);
    letter-spacing: .16em;
  }
  kbd {
    padding: 1px 5px;
    border: 1px solid var(--line-hot);
    border-bottom-width: 2px;
    border-radius: 3px;
    background: var(--raised);
    color: var(--ink);
    font: 9px var(--mono);
  }
}

@layer layout {
  .topbar {
    position: relative;
    z-index: 20;
    height: 58px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 20px;
    padding: 0 max(14px, env(safe-area-inset-left));
    border-bottom: 1px solid var(--line);
    background: color-mix(in srgb, var(--black) 92%, transparent);
    backdrop-filter: blur(18px);
  }

  .workspace {
    height: calc(100dvh - 58px);
    display: grid;
    grid-template-columns: minmax(0, 1fr) clamp(340px, 30vw, 430px);
  }

  .viewport-shell {
    position: relative;
    min-width: 0;
    overflow: hidden;
    isolation: isolate;
    background: #090d0f;
    cursor: grab;
  }
  .viewport-shell:active { cursor: grabbing; }
  #matter-canvas { width: 100%; height: 100%; }

  .control-rack {
    min-width: 0;
    display: grid;
    grid-template-rows: auto auto minmax(0, 1fr) auto;
    border-left: 1px solid var(--line);
    background: var(--panel);
  }
  .panel-scroll { min-height: 0; overflow: auto; scrollbar-color: var(--line-hot) transparent; }
  .control-panel { padding: 16px 17px 28px; }
}

@layer components {
  .wordmark {
    width: max-content;
    display: flex;
    align-items: center;
    gap: 9px;
    color: inherit;
    text-decoration: none;
  }
  .wordmark-mark {
    width: 31px;
    height: 31px;
    display: grid;
    place-items: center;
    border: 1px solid var(--acid);
    color: var(--acid);
    font: 800 14px/1 var(--mono);
    box-shadow: inset 0 0 18px rgba(199, 255, 56, .08);
  }
  .wordmark b { display: block; font: 800 13px/1 var(--mono); letter-spacing: .16em; }
  .wordmark small { display: block; margin-top: 3px; color: var(--muted); font: 7px/1 var(--mono); letter-spacing: .13em; }

  .machine-state { display: flex; align-items: center; gap: 13px; color: var(--muted); font: 9px/1 var(--mono); letter-spacing: .08em; }
  .status-dot { color: var(--acid); }
  .status-dot::before {
    content: "";
    width: 6px;
    height: 6px;
    display: inline-block;
    margin-right: 6px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 12px currentColor;
  }
  .status-dot.paused { color: var(--amber); }
  .status-dot.fallback { color: var(--cyan); }
  .status-dot.error { color: var(--danger); }

  .top-actions { display: flex; justify-content: flex-end; gap: 5px; }
  .icon-button, .micro-button, .viewport-foot button, .quick-actions button, .button-row button, .link-button {
    border: 1px solid var(--line);
    background: var(--raised);
    color: var(--muted);
    cursor: pointer;
  }
  .icon-button {
    height: 31px;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 0 9px;
    font: 700 9px var(--mono);
    text-transform: uppercase;
  }
  button:hover { border-color: var(--line-hot); color: var(--ink); }
  button:active { transform: translateY(1px); }

  .quick-actions {
    inset: 50px 12px auto auto;
    width: 245px;
    padding: 12px;
    border: 1px solid var(--line-hot);
    background: rgba(13, 18, 20, .98);
    color: var(--ink);
    box-shadow: 0 18px 60px #000b;
  }
  .quick-actions::backdrop { background: transparent; }
  .quick-actions strong { display: block; margin-bottom: 9px; color: var(--cyan); font: 700 9px var(--mono); letter-spacing: .12em; }
  .quick-actions button { width: 100%; display: flex; justify-content: space-between; padding: 8px; font: 10px var(--mono); text-align: left; }
  .quick-actions button + button { border-top: 0; }

  .viewport-shell::before, .viewport-shell::after {
    content: "";
    position: absolute;
    z-index: 2;
    pointer-events: none;
  }
  .viewport-shell::before {
    inset: 12px;
    border: 1px solid rgba(150, 170, 163, .12);
    clip-path: polygon(0 0, 32px 0, 32px 1px, calc(100% - 32px) 1px, calc(100% - 32px) 0, 100% 0, 100% 32px, calc(100% - 1px) 32px, calc(100% - 1px) calc(100% - 32px), 100% calc(100% - 32px), 100% 100%, calc(100% - 32px) 100%, calc(100% - 32px) calc(100% - 1px), 32px calc(100% - 1px), 32px 100%, 0 100%, 0 calc(100% - 32px), 1px calc(100% - 32px), 1px 32px, 0 32px);
  }
  .viewport-shell::after {
    inset: auto 0 0;
    height: 38%;
    background: linear-gradient(transparent, rgba(5, 7, 8, .36));
  }
  .scanline {
    position: absolute;
    z-index: 1;
    inset: 0;
    pointer-events: none;
    opacity: .1;
    background: repeating-linear-gradient(0deg, transparent 0 3px, rgba(255,255,255,.045) 3px 4px);
    mix-blend-mode: overlay;
  }

  .viewport-head, .viewport-foot, .field-readout, .slice-plane { position: absolute; z-index: 3; pointer-events: none; }
  .viewport-head { top: 29px; left: 31px; right: 31px; display: flex; justify-content: space-between; gap: 20px; }
  .viewport-head strong { display: block; margin-top: 5px; font: 600 clamp(13px, 1.3vw, 18px) var(--mono); letter-spacing: .04em; }
  .view-axis { display: flex; gap: 5px; }
  .view-axis i {
    width: 21px;
    height: 21px;
    display: grid;
    place-items: center;
    border: 1px solid var(--line-hot);
    color: var(--muted);
    font: normal 8px var(--mono);
  }
  .view-axis i:first-child { color: #ff7871; }
  .view-axis i:nth-child(2) { color: var(--acid); }
  .view-axis i:last-child { color: var(--cyan); }

  .viewport-foot {
    right: 28px;
    bottom: 23px;
    left: 28px;
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--ghost);
    font: 8px var(--mono);
    letter-spacing: .08em;
  }
  .viewport-foot button { margin-left: auto; padding: 5px 7px; font: 8px var(--mono); pointer-events: auto; }

  .field-readout { top: 88px; left: 31px; display: grid; gap: 2px; }
  .field-readout div { min-width: 112px; display: flex; justify-content: space-between; gap: 15px; padding: 4px 6px; border-left: 1px solid var(--line-hot); background: rgba(8, 11, 13, .38); }
  .field-readout span { color: var(--ghost); font: 8px var(--mono); }
  .field-readout output { color: var(--muted); font: 8px var(--mono); }

  .slice-plane {
    top: 50%;
    right: 8%;
    left: 8%;
    height: 1px;
    opacity: .4;
    background: linear-gradient(90deg, transparent, var(--cyan), transparent);
    box-shadow: 0 0 15px rgba(101, 243, 231, .4);
    transition: top 120ms linear, opacity 160ms ease;
  }
  .slice-plane::before { content: ""; position: absolute; inset: -2px 20%; border: 1px dotted rgba(101,243,231,.25); }
  .slice-plane span { position: absolute; right: 12%; bottom: 5px; color: var(--cyan); font: 7px var(--mono); letter-spacing: .12em; }

  .webgl-fallback {
    position: absolute;
    inset: 0;
    z-index: 1;
    overflow: hidden;
    background: var(--void);
    pointer-events: none;
  }
  #cpu-canvas { width: 100%; height: 100%; image-rendering: auto; }
  .cpu-renderer-badge {
    position: absolute;
    right: 27px;
    bottom: 55px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border: 1px solid rgba(101,243,231,.32);
    background: rgba(5,7,8,.76);
    backdrop-filter: blur(8px);
  }
  .cpu-renderer-badge strong { color: var(--cyan); font: 700 8px var(--mono); letter-spacing: .1em; }
  .cpu-renderer-badge span { color: var(--ghost); font: 7px var(--mono); letter-spacing: .04em; }

  .preset-strip { padding: 10px 12px; border-bottom: 1px solid var(--line); }
  .preset-strip > span { display: block; margin-bottom: 7px; color: var(--ghost); font: 700 7px var(--mono); letter-spacing: .16em; }
  #preset-list { display: flex; gap: 5px; overflow: auto; scrollbar-width: none; }
  #preset-list::-webkit-scrollbar { display: none; }
  #preset-list button {
    flex: 0 0 auto;
    padding: 5px 7px;
    border: 1px solid var(--line);
    background: var(--void);
    color: var(--muted);
    font: 8px var(--mono);
    cursor: pointer;
  }
  #preset-list button.active { border-color: var(--acid); color: var(--acid); }

  .tab-bar { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); }
  .tab-bar button {
    min-width: 0;
    padding: 11px 4px 9px;
    border: 0;
    border-right: 1px solid var(--line);
    border-bottom: 2px solid transparent;
    background: var(--void);
    color: var(--ghost);
    font: 700 8px var(--mono);
    letter-spacing: .04em;
    cursor: pointer;
  }
  .tab-bar button:last-child { border-right: 0; }
  .tab-bar button[aria-selected="true"] { border-bottom-color: var(--acid); background: var(--panel); color: var(--ink); }

  .panel-header, .subhead { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
  .panel-header { margin-bottom: 15px; }
  .panel-header > div { display: flex; align-items: baseline; gap: 8px; }
  .panel-header > div > span { color: var(--acid); font: 700 8px var(--mono); }
  .panel-header h2 { font-size: 15px; letter-spacing: -.02em; }
  .panel-note { margin: -6px 0 15px; color: var(--muted); font-size: 10px; line-height: 1.55; }
  .micro-button { padding: 5px 7px; font: 8px var(--mono); text-transform: uppercase; }

  .form-pair { display: grid; grid-template-columns: 1fr 18px 1fr; align-items: end; gap: 6px; margin-bottom: 13px; }
  .form-pair label, .mod-selects label, .resolution-row { color: var(--muted); font: 8px var(--mono); text-transform: uppercase; letter-spacing: .07em; }
  select, input[type="number"] {
    width: 100%;
    height: 31px;
    margin-top: 5px;
    padding: 0 7px;
    border: 1px solid var(--line);
    border-radius: 0;
    outline: 0;
    background: var(--void);
    color: var(--ink);
    font: 9px var(--mono);
  }
  select:focus, input[type="number"]:focus { border-color: var(--cyan); }
  .blend-glyph { display: grid; place-items: center; height: 31px; color: var(--acid); font: 11px var(--mono); }

  .model-envelope-card {
    margin-bottom: 15px;
    padding: 11px;
    border: 1px solid var(--line);
    background: linear-gradient(145deg, rgba(101,243,231,.035), transparent 55%), var(--void);
  }
  .model-envelope-card .subhead { margin-bottom: 8px; }
  .envelope-switch { display: grid; grid-template-columns: 1fr 1fr; margin-bottom: 8px; }
  .envelope-switch button {
    min-height: 29px;
    border: 1px solid var(--line);
    background: var(--black);
    color: var(--ghost);
    font: 700 8px var(--mono);
    text-transform: uppercase;
    cursor: pointer;
  }
  .envelope-switch button + button { border-left: 0; }
  .envelope-switch button[aria-pressed="true"] { border-color: var(--cyan); color: var(--cyan); background: rgba(101,243,231,.055); }
  .model-drop {
    min-height: 57px;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 10px;
    padding: 9px;
    border: 1px dashed var(--line-hot);
    background: rgba(255,255,255,.012);
    transition: 120ms ease;
  }
  .model-drop.dragging { border-color: var(--acid); background: rgba(199,255,56,.06); box-shadow: inset 0 0 25px rgba(199,255,56,.03); }
  .model-drop strong, .model-drop span { display: block; }
  .model-drop strong { color: var(--ink); font: 700 9px var(--mono); }
  .model-drop span { margin-top: 4px; color: var(--ghost); font: 7px/1.35 var(--mono); }
  .model-drop button { min-height: 30px; padding: 0 8px; border: 1px solid var(--acid); background: transparent; color: var(--acid); font: 8px var(--mono); cursor: pointer; }
  #model-progress { margin: 7px 0 2px; }
  .model-summary { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-top: 8px; background: var(--line); }
  .model-summary > div { min-width: 0; padding: 7px; background: var(--black); }
  .model-summary span, .model-summary strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .model-summary span { color: var(--ghost); font: 7px var(--mono); }
  .model-summary strong { margin-top: 3px; color: var(--ink); font: 8px var(--mono); }
  .model-options { display: grid; grid-template-columns: 1fr 1fr auto; align-items: end; gap: 8px; margin-top: 9px; }
  .model-options > label { color: var(--muted); font: 8px var(--mono); text-transform: uppercase; letter-spacing: .05em; }
  .model-options select { margin-top: 4px; }
  .model-options .parameter { align-self: center; }
  .model-options .micro-button { min-height: 31px; }
  .model-envelope-card.model-active { border-color: color-mix(in srgb, var(--cyan) 45%, var(--line)); }
  .model-envelope-card.model-busy { opacity: .72; cursor: wait; }

  .parameter-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 13px 14px; }
  .parameter { min-width: 0; }
  .parameter.featured { padding: 10px; border: 1px solid var(--line); background: var(--void); margin-bottom: 15px; }
  .parameter label { display: flex; justify-content: space-between; gap: 8px; color: var(--muted); font: 8px var(--mono); text-transform: uppercase; letter-spacing: .05em; }
  .parameter output { color: var(--ink); white-space: nowrap; }
  input[type="range"] {
    --fill: 50%;
    width: 100%;
    height: 14px;
    margin: 5px 0 0;
    padding: 0;
    appearance: none;
    background: transparent;
    cursor: ew-resize;
  }
  input[type="range"]::-webkit-slider-runnable-track {
    height: 2px;
    background: linear-gradient(90deg, var(--acid) var(--fill), var(--line-hot) var(--fill));
  }
  input[type="range"]::-moz-range-track { height: 2px; background: var(--line-hot); }
  input[type="range"]::-moz-range-progress { height: 2px; background: var(--acid); }
  input[type="range"]::-webkit-slider-thumb {
    width: 8px;
    height: 12px;
    margin-top: -5px;
    border: 1px solid var(--acid);
    border-radius: 0;
    appearance: none;
    background: var(--void);
    box-shadow: 0 0 0 2px var(--void);
  }
  input[type="range"]::-moz-range-thumb { width: 8px; height: 12px; border: 1px solid var(--acid); border-radius: 0; background: var(--void); }

  details { margin-top: 15px; border-top: 1px solid var(--line); }
  summary { padding: 10px 0; color: var(--muted); font: 700 8px var(--mono); text-transform: uppercase; letter-spacing: .09em; cursor: pointer; }
  summary::marker { color: var(--acid); }
  .details-grid { padding: 4px 0 2px; }

  .dimension-table { display: grid; gap: 7px; }
  .dimension-table label { display: grid; grid-template-columns: 25px 1fr 58px; align-items: center; gap: 5px; color: var(--muted); font: 8px var(--mono); }
  .dimension-table label > span { width: 20px; height: 20px; display: grid; place-items: center; border: 1px solid var(--line); color: var(--cyan); }
  .dimension-table output { color: var(--ink); text-align: right; }
  .lock-row { display: flex; justify-content: space-between; align-items: center; margin-top: 10px; }

  .switch { display: inline-flex; align-items: center; gap: 7px; color: var(--muted); font: 8px var(--mono); text-transform: uppercase; cursor: pointer; }
  .switch input { position: absolute; opacity: 0; pointer-events: none; }
  .switch > span { width: 25px; height: 13px; position: relative; border: 1px solid var(--line-hot); background: var(--void); }
  .switch > span::after { content: ""; position: absolute; top: 2px; left: 2px; width: 7px; height: 7px; background: var(--ghost); transition: 120ms ease; }
  .switch input:checked + span { border-color: var(--acid); }
  .switch input:checked + span::after { left: 14px; background: var(--acid); }
  .switch input:focus-visible + span { outline: 2px solid var(--acid); outline-offset: 2px; }
  .switch.compact > span { width: 21px; }
  .switch.compact input:checked + span::after { left: 10px; }

  .seed-control { display: grid; grid-template-columns: 1fr 110px 31px; align-items: end; gap: 7px; margin-top: 16px; padding-top: 13px; border-top: 1px solid var(--line); }
  .seed-control > label { align-self: center; color: var(--muted); font: 8px var(--mono); text-transform: uppercase; }
  .seed-control input { margin: 0; }
  .seed-control button { height: 31px; border: 1px solid var(--line); background: var(--void); color: var(--acid); cursor: pointer; }

  .transport { display: grid; grid-template-columns: 86px 1fr; align-items: center; gap: 12px; padding: 10px; border: 1px solid var(--line); background: var(--void); }
  .transport > button { height: 33px; border: 1px solid var(--acid); background: rgba(199,255,56,.05); color: var(--acid); font: 8px var(--mono); text-transform: uppercase; cursor: pointer; }
  .transport > label { display: grid; grid-template-columns: 1fr 45px; color: var(--muted); font: 8px var(--mono); text-transform: uppercase; }
  .transport input { grid-column: 1; }
  .transport output { grid-column: 2; grid-row: 2; align-self: center; color: var(--ink); text-align: right; }

  .modulator-list { display: grid; gap: 8px; margin-top: 12px; }
  .modulator { padding: 10px; border: 1px solid var(--line); background: color-mix(in srgb, var(--raised) 55%, transparent); }
  .modulator > header { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 7px; margin-bottom: 9px; }
  .modulator header strong { font: 700 8px var(--mono); letter-spacing: .1em; }
  .modulator header strong i { color: var(--acid); font-style: normal; }
  .modulator header output { color: var(--cyan); font: 8px var(--mono); }
  .modulator.disabled { opacity: .52; }
  .mod-selects { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
  .mod-knobs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 9px; }
  .mod-knobs label { display: grid; grid-template-columns: 1fr auto; color: var(--ghost); font: 7px var(--mono); text-transform: uppercase; }
  .mod-knobs input { grid-column: 1 / -1; }
  .mod-knobs output { color: var(--muted); }

  .signal-scope { position: relative; margin-top: 12px; border: 1px solid var(--line); background: var(--black); }
  #scope-canvas { width: 100%; height: 74px; }
  .signal-scope > span { position: absolute; top: 6px; left: 7px; color: var(--ghost); font: 7px var(--mono); letter-spacing: .12em; }

  .palette-fieldset { padding: 0; border: 0; }
  .palette-fieldset legend { margin-bottom: 9px; color: var(--muted); font: 8px var(--mono); text-transform: uppercase; letter-spacing: .09em; }
  .palette-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 7px; margin-bottom: 16px; }
  .palette-list button { min-width: 0; padding: 4px; border: 1px solid var(--line); background: var(--void); color: var(--muted); font: 7px var(--mono); cursor: pointer; }
  .palette-list button::before { content: ""; display: block; height: 25px; margin-bottom: 5px; background: linear-gradient(90deg, var(--a), var(--b)); }
  .palette-list button.active { border-color: var(--acid); color: var(--ink); }
  .material-grid { margin-bottom: 16px; }
  .toggle-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 13px 8px; margin-top: 17px; padding: 13px 0; border-top: 1px solid var(--line); }

  .slice-lab, .analysis-lab, .design-io { padding-top: 2px; }
  .analysis-lab, .design-io { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); }
  .subhead { margin-bottom: 9px; }
  .subhead h3 { font-size: 11px; }
  .subhead > span { color: var(--ghost); font: 7px var(--mono); letter-spacing: .1em; }
  #slice-canvas { width: 100%; aspect-ratio: 8 / 5; border: 1px solid var(--line); background: var(--black); cursor: crosshair; }
  .probe-readout { padding: 5px 7px; border: 1px solid var(--line); border-top: 0; color: var(--cyan); font: 7px var(--mono); text-align: right; }
  .slice-lab .featured { margin-top: 10px; margin-bottom: 8px; padding: 7px 9px; }
  .button-row { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
  .button-row.three { grid-template-columns: repeat(3, 1fr); }
  .button-row button { min-height: 31px; padding: 6px; font: 8px var(--mono); }

  .metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
  .metric-grid article { min-width: 0; padding: 9px; border: 1px solid var(--line); background: var(--void); }
  .metric-grid span, .metric-grid small { display: block; color: var(--ghost); font: 7px var(--mono); text-transform: uppercase; }
  .metric-grid strong { display: block; margin: 5px 0 3px; color: var(--ink); font: 600 16px var(--mono); }
  meter { width: 100%; height: 4px; accent-color: var(--acid); }
  .resolution-row { display: grid; grid-template-columns: 1fr 150px; align-items: center; margin: 10px 0; }
  .resolution-row select { margin: 0; }
  progress { width: 100%; height: 5px; margin: 2px 0 8px; border: 0; accent-color: var(--acid); }
  progress::-webkit-progress-bar { background: var(--line); }
  progress::-webkit-progress-value { background: var(--acid); }
  .primary-button { width: 100%; min-height: 48px; display: grid; place-content: center; gap: 3px; border: 1px solid var(--acid); background: rgba(199,255,56,.06); color: var(--acid); cursor: pointer; }
  .primary-button span { font: 700 10px var(--mono); text-transform: uppercase; letter-spacing: .06em; }
  .primary-button small { color: var(--muted); font: 7px var(--mono); }
  .primary-button:disabled { opacity: .55; cursor: wait; }
  .link-button { width: 100%; margin-top: 7px; padding: 8px; font: 8px var(--mono); }

  .rack-footer { min-height: 31px; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 0 12px; border-top: 1px solid var(--line); background: var(--black); color: var(--ghost); font: 7px var(--mono); letter-spacing: .08em; }
  #engine-message { overflow: hidden; color: var(--cyan); text-overflow: ellipsis; white-space: nowrap; }

  dialog {
    width: min(620px, calc(100% - 24px));
    max-height: calc(100dvh - 28px);
    padding: 24px;
    overflow: auto;
    border: 1px solid var(--line-hot);
    background: #0c1113;
    color: var(--ink);
    box-shadow: 0 25px 100px #000;
  }
  dialog::backdrop { background: rgba(2,4,5,.8); backdrop-filter: blur(8px); }
  .dialog-close { position: absolute; top: 10px; right: 10px; width: 30px; height: 30px; border: 1px solid var(--line); background: var(--void); color: var(--muted); cursor: pointer; }
  dialog h2 { max-width: 470px; margin: 8px 0 10px; font-size: clamp(22px, 4vw, 34px); line-height: 1; letter-spacing: -.04em; }
  dialog h3 { margin: 20px 0 7px; font-size: 12px; }
  dialog p, dialog li { color: var(--muted); font-size: 11px; line-height: 1.6; }
  dialog ul { padding-left: 20px; }
  .formula { margin: 15px 0; padding: 12px; overflow-x: auto; border-left: 2px solid var(--acid); background: var(--void); color: var(--acid); font: 11px var(--mono); white-space: nowrap; }
  dialog table { width: 100%; border-collapse: collapse; font-size: 9px; }
  dialog th, dialog td { padding: 7px; border: 1px solid var(--line); text-align: left; }
  dialog th { color: var(--cyan); font-family: var(--mono); }
  dialog td:first-child { color: var(--acid); font-family: var(--mono); }

  .toast {
    position: fixed;
    z-index: 80;
    right: 18px;
    bottom: 18px;
    max-width: min(330px, calc(100% - 36px));
    padding: 10px 12px;
    border: 1px solid var(--acid);
    background: var(--black);
    color: var(--ink);
    font: 9px var(--mono);
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
    transition: 160ms ease;
  }
  .toast.visible { opacity: 1; transform: none; }
}

@layer responsive {
  @media (max-width: 980px) {
    .workspace { grid-template-columns: minmax(0, 1fr) 350px; }
    .button-label, .viewport-foot span:nth-child(2) { display: none; }
  }

  @media (max-width: 760px) {
    body { overflow: auto; }
    .topbar { position: sticky; top: 0; grid-template-columns: 1fr auto; height: 52px; padding-right: max(9px, env(safe-area-inset-right)); }
    .machine-state { display: none; }
    .wordmark-mark { width: 28px; height: 28px; }
    .workspace { height: auto; min-height: calc(100dvh - 52px); display: block; }
    .viewport-shell { position: sticky; z-index: 5; top: 52px; height: 46dvh; min-height: 275px; border-bottom: 1px solid var(--line); }
    .control-rack { min-height: 54dvh; display: grid; grid-template-rows: auto auto auto auto; border-left: 0; }
    .panel-scroll { overflow: visible; }
    .control-panel { padding-bottom: calc(30px + env(safe-area-inset-bottom)); }
    .preset-strip { background: var(--black); }
    .tab-bar { position: sticky; z-index: 8; top: calc(52px + 46dvh); background: var(--void); }
    .viewport-head { top: 20px; left: 21px; right: 21px; }
    .field-readout { top: 75px; left: 21px; }
    .viewport-foot { right: 20px; bottom: 17px; left: 20px; }
    .cpu-renderer-badge { right: 20px; bottom: 48px; }
    .rack-footer { padding-bottom: env(safe-area-inset-bottom); }
  }

  @media (max-width: 430px) {
    .wordmark small { display: none; }
    .top-actions { gap: 3px; }
    .icon-button { width: 30px; justify-content: center; padding: 0; }
    .viewport-shell { height: 43dvh; min-height: 250px; }
    .tab-bar { top: calc(52px + 43dvh); }
    .viewport-head strong { max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .view-axis, .field-readout div:nth-child(2), .viewport-foot span { display: none; }
    .control-panel { padding-inline: 13px; }
    .parameter-grid { gap-inline: 10px; }
    .mod-knobs { gap: 5px; }
    .model-options { grid-template-columns: 1fr 1fr; }
    .model-options .micro-button { grid-column: 1 / -1; }
    .cpu-renderer-badge span { display: none; }
  }

  @media (max-height: 690px) and (min-width: 761px) {
    .topbar { height: 50px; }
    .workspace { height: calc(100dvh - 50px); }
    .preset-strip { padding-block: 7px; }
    .tab-bar button { padding-block: 8px 6px; }
  }

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