:root {
  color-scheme: dark;
  font-family: "Inter", "Avenir Next", system-ui, sans-serif;
  --bg: #141514;
  --panel: #101512;
  --panel-strong: #0b0f0e;
  --line: rgba(241, 241, 232, 0.16);
  --line-strong: rgba(241, 241, 232, 0.28);
  --text: #f1f1e8;
  --muted: #aeb5a7;
  --accent: #16c7bd;
  --yellow: #f3d447;
  background: var(--bg);
  color: var(--text);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 0;
  overscroll-behavior: none;
  background:
    linear-gradient(90deg, rgba(31, 32, 30, 0.92), rgba(17, 22, 20, 0.94)),
    var(--bg);
}

[hidden] {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

button {
  border: 1px solid #6d6d62;
  border-radius: 6px;
  background: var(--text);
  color: #151515;
  cursor: pointer;
  font: inherit;
  min-height: 38px;
  padding: 0 14px;
}

button:focus-visible {
  outline: 3px solid #16c7bd;
  outline-offset: 2px;
}

.shell {
  width: min(1540px, calc(100vw - 32px));
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(300px, 24vw, 360px);
  gap: clamp(14px, 2vw, 24px);
  align-items: start;
}

.stage {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.screen-window {
  min-width: 320px;
  min-height: 300px;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(10, 13, 12, 0.76);
  overflow: auto;
}

.window-header {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
  padding: 9px 12px;
}

.window-header h2 {
  margin: 0 auto 0 0;
  font-size: 14px;
}

.window-header output {
  font: 12px/1.2 "SFMono-Regular", Consolas, monospace;
}

.window-header label {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
}

.window-header input {
  accent-color: var(--accent);
}

.screen-wrap {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 240px;
}

#screen,
#rasterOverlay {
  grid-area: 1 / 1;
  width: min(100%, 900px);
  max-height: min(68vh, 740px);
  image-rendering: pixelated;
  aspect-ratio: 4 / 3;
  object-fit: contain;
}

#screen {
  background: #000;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.46);
}

#rasterOverlay {
  pointer-events: none;
}

.panel {
  position: sticky;
  top: 18px;
  display: grid;
  gap: 14px;
  align-content: start;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(10, 15, 13, 0.76);
  box-shadow: 0 20px 55px rgba(0, 0, 0, 0.32);
  padding: 14px;
}

.panel::before {
  content: "";
  display: block;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, #1d4ed8 0 25%, #c026d3 25% 50%, #dc2626 50% 75%, #f3d447 75%);
}

h1 {
  margin: 0 0 6px;
  font-size: 22px;
  line-height: 1.1;
}

output {
  color: #c9c9bd;
  font-size: 14px;
}

.controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.tool-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-strong);
  padding: 4px;
}

.tool-tabs button {
  min-height: 34px;
  border-color: transparent;
  background: transparent;
  color: var(--muted);
  padding: 0 6px;
  font-size: 12px;
  font-weight: 700;
}

.tool-tabs button[aria-selected="true"] {
  border-color: rgba(22, 199, 189, 0.42);
  background: rgba(22, 199, 189, 0.16);
  color: var(--text);
}

.tool-panel,
.paste-form {
  display: grid;
  gap: 10px;
}

.paste-form label,
.basic-file-panel label,
.tape-panel label,
.snapshot-panel label {
  color: #c9c9bd;
  font-size: 14px;
}

.paste-form textarea {
  width: 100%;
  min-height: 134px;
  resize: vertical;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  font: 13px/1.35 "SFMono-Regular", Consolas, monospace;
  padding: 10px;
}

.paste-form textarea:focus-visible {
  outline: 3px solid #16c7bd;
  outline-offset: 2px;
}

.tape-panel,
.basic-file-panel,
.snapshot-panel {
  display: grid;
  gap: 8px;
}

.rzx-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

#rzxStatus {
  font: 12px/1.35 "SFMono-Regular", Consolas, monospace;
}

.tape-panel input,
.basic-file-panel input,
.snapshot-panel input {
  width: 100%;
  color: #c9c9bd;
  font: 12px/1.2 "SFMono-Regular", Consolas, monospace;
}

.tape-panel input::file-selector-button,
.basic-file-panel input::file-selector-button,
.snapshot-panel input::file-selector-button {
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  background: #d9d8cc;
  color: #151515;
  font: 700 11px/1.2 "Inter", "Avenir Next", system-ui, sans-serif;
  margin-right: 8px;
  padding: 5px 8px;
}

dl {
  display: grid;
  gap: 0;
  margin: 0;
}

dl div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
  padding-block: 8px;
}

dt {
  color: #c9c9bd;
}

dd {
  margin: 0;
  font-family: "SFMono-Regular", Consolas, monospace;
  max-width: 130px;
  overflow-wrap: anywhere;
  text-align: right;
}

.debug-options {
  display: grid;
  gap: 8px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.debug-options label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #c9c9bd;
  font-size: 13px;
}

.debug-options input {
  accent-color: var(--accent);
}

.debug-drawer {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(10, 13, 12, 0.52);
}

.debug-drawer summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  padding: 12px 14px;
  list-style: none;
}

.debug-drawer summary::-webkit-details-marker {
  display: none;
}

.debug-drawer summary span {
  font-weight: 800;
}

.debug-drawer summary strong {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  text-align: right;
}

.debugger {
  display: grid;
  grid-template-areas:
    "registers disassembly"
    "basic memory"
    "source reference";
  grid-template-columns: minmax(280px, 0.9fr) minmax(360px, 1.4fr);
  gap: 12px;
  align-items: start;
  padding: 0 12px 12px;
}

.debug-card {
  min-width: 0;
  min-height: 150px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(10, 13, 12, 0.76);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.26);
  padding: 12px;
}

.resizable-window {
  resize: both;
}

.window-tools {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
  padding: 6px 8px 0;
}

.window-tools button {
  min-height: 28px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: rgba(8, 16, 13, 0.92);
  color: var(--muted);
  font: inherit;
  font-size: 11px;
  cursor: pointer;
}

.rewind-control {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: auto minmax(90px, 1fr) auto;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 11px;
}

.rewind-control input {
  width: 100%;
}

.rewind-control output {
  min-width: 82px;
  text-align: right;
}

.floating-debug-window {
  position: fixed !important;
  z-index: 30;
  min-width: 280px;
  max-width: calc(100vw - 16px) !important;
  max-height: calc(100vh - 16px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.72);
}

.floating-debug-window h2,
.floating-debug-window .window-header {
  cursor: move;
  touch-action: none;
  user-select: none;
}

.debug-popout-body {
  min-width: 0;
  padding: 12px;
  background: #090d0b;
  color: var(--text);
}

.debug-popout-body > * {
  width: 100% !important;
  height: auto !important;
  max-width: none !important;
  resize: none;
}

.debug-card h2 {
  margin: 0 0 10px;
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
}

.register-grid,
.basic-status {
  display: grid;
  grid-template-columns: repeat(4, minmax(54px, 1fr));
  gap: 6px;
}

.register-cell,
.basic-cell {
  min-width: 0;
  border: 1px solid rgba(241, 241, 232, 0.12);
  border-radius: 6px;
  background: var(--panel);
  padding: 7px 8px;
}

.register-cell span,
.basic-cell span {
  display: block;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.1;
}

.register-cell strong,
.basic-cell strong {
  display: block;
  margin-top: 4px;
  overflow-wrap: anywhere;
  color: var(--text);
  font: 700 13px/1 "SFMono-Regular", Consolas, monospace;
}

.flag-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 4px;
  margin-top: 10px;
}

.flag {
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #777d72;
  font: 700 11px/24px "SFMono-Regular", Consolas, monospace;
  text-align: center;
}

.flag.on {
  border-color: var(--accent);
  background: var(--accent);
  color: #051615;
}

.basic-card {
  grid-area: basic;
}

.registers-card {
  grid-area: registers;
}

.basic-status {
  grid-template-columns: repeat(3, minmax(70px, 1fr));
}

.disassembly-card {
  grid-area: disassembly;
}

.disassembly {
  display: grid;
  gap: 3px;
  margin: 0;
  padding: 0;
  list-style: none;
  font: 12px/1.35 "SFMono-Regular", Consolas, monospace;
}

.disassembly li {
  display: grid;
  grid-template-columns: 48px 78px minmax(0, 1fr);
  gap: 8px;
  border-radius: 5px;
  padding: 4px 6px;
  color: #d8d8cf;
}

.disassembly li.current {
  background: var(--yellow);
  color: #14130c;
}

.disassembly .addr,
.disassembly .bytes {
  color: inherit;
  opacity: 0.78;
}

.disassembly .asm {
  overflow-wrap: anywhere;
  font-weight: 700;
}

.memory-card {
  grid-area: memory;
}

.source-card {
  grid-area: source;
}

.reference-card {
  grid-area: reference;
}

.source-card label,
.reference-card label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 12px;
}

.source-card input,
.reference-card select,
.reference-card input {
  width: 100%;
  color: var(--text);
  font: 12px/1.2 "SFMono-Regular", Consolas, monospace;
}

.source-card input::file-selector-button {
  margin-right: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  padding: 6px 8px;
}

.source-listing {
  max-height: 420px;
  margin: 10px 0 0;
  padding-left: 42px;
  overflow: auto;
  color: #d8d8cf;
  font: 12px/1.4 "SFMono-Regular", Consolas, monospace;
  white-space: pre;
}

.source-listing li {
  padding: 1px 6px;
}

.source-listing li.current {
  background: var(--yellow);
  color: #14130c;
}

.assembler-reference {
  display: grid;
  gap: 6px;
  max-height: 360px;
  margin: 10px 0;
  overflow: auto;
}

.assembler-reference article {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 8px;
}

.assembler-reference small {
  color: var(--accent);
  font-weight: 700;
}

.assembler-reference code {
  display: block;
  margin: 3px 0;
  color: var(--text);
  font-weight: 700;
}

.assembler-reference p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.reference-card > a {
  color: var(--accent);
  font-size: 12px;
}

.cpm-debug-drawer {
  border-color: rgba(93, 255, 139, 0.24);
  background: rgba(3, 16, 6, 0.5);
}

.cpm-debugger {
  grid-template-areas:
    "registers disassembly"
    "io console"
    "trace trace";
  grid-template-columns: minmax(260px, 0.9fr) minmax(320px, 1.2fr);
}

.cpm-io-card {
  grid-area: io;
}

.cpm-console-card {
  grid-area: console;
}

.cpm-trace-card {
  grid-area: trace;
}

.cpm-trace-state {
  min-height: 40px;
  margin: 0;
  color: var(--muted);
  font: 12px/1.45 "SFMono-Regular", Consolas, monospace;
  white-space: pre-wrap;
}

.trs80-debug-drawer {
  border-color: rgba(255, 202, 106, 0.24);
  background: rgba(18, 13, 5, 0.5);
}

.trs80-debugger {
  grid-template-areas:
    "registers disassembly"
    "keyboard display"
    "memory memory";
  grid-template-columns: minmax(260px, 0.9fr) minmax(320px, 1.2fr);
}

.trs80-keyboard-card {
  grid-area: keyboard;
}

.trs80-display-card {
  grid-area: display;
}

.trs80-keyboard-matrix {
  display: grid;
  gap: 5px;
  margin-top: 10px;
  font: 11px/1.25 "SFMono-Regular", Consolas, monospace;
}

.trs80-keyboard-matrix div {
  display: grid;
  grid-template-columns: 48px 32px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
  border: 1px solid rgba(255, 202, 106, 0.14);
  border-radius: 6px;
  background: rgba(255, 209, 123, 0.04);
  color: #bbc4b7;
  padding: 5px 7px;
}

.trs80-keyboard-matrix div.active {
  border-color: rgba(255, 202, 106, 0.44);
  background: rgba(255, 209, 123, 0.12);
  color: #ffd17b;
}

.trs80-keyboard-matrix strong {
  color: inherit;
}

.trs80-keyboard-matrix em {
  overflow-wrap: anywhere;
  color: inherit;
  font-style: normal;
}

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

.memory-inspector h3 {
  margin: 0 0 5px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.memory-inspector pre {
  margin: 0;
  overflow: hidden;
  color: var(--text);
  font: 11px/1.45 "SFMono-Regular", Consolas, monospace;
  white-space: pre-wrap;
}

.trs80-memory-inspector {
  grid-template-columns: 1fr;
}

.trs80-memory-inspector pre {
  overflow-x: auto;
  white-space: pre;
}

@media (min-width: 1280px) {
  .debugger {
    grid-template-areas:
      "registers disassembly memory"
      "basic disassembly memory"
      "source source reference";
    grid-template-columns: minmax(260px, 0.85fr) minmax(320px, 1.1fr) minmax(360px, 1.35fr);
  }

  .cpm-debugger {
    grid-template-areas:
      "registers disassembly io"
      "console disassembly trace";
    grid-template-columns: minmax(230px, 0.8fr) minmax(320px, 1.15fr) minmax(250px, 0.85fr);
  }

  .trs80-debugger {
    grid-template-areas:
      "registers disassembly memory"
      "keyboard disassembly memory"
      "display display memory";
    grid-template-columns: minmax(230px, 0.8fr) minmax(320px, 1.1fr) minmax(330px, 1fr);
  }
}

@media (max-width: 1180px) {
  body {
    place-items: start center;
    padding: 14px 0;
  }

  .shell {
    width: min(100vw - 24px, 1480px);
    grid-template-columns: minmax(0, 1fr) clamp(280px, 28vw, 340px);
  }

  #screen {
    width: min(100%, 760px);
    max-height: 58vh;
  }

  .debugger {
    grid-template-areas:
      "registers disassembly"
      "basic memory"
      "source reference";
    grid-template-columns: minmax(240px, 0.85fr) minmax(300px, 1.3fr);
  }

  .cpm-debugger {
    grid-template-areas:
      "registers disassembly"
      "io console"
      "trace trace";
    grid-template-columns: minmax(240px, 0.85fr) minmax(300px, 1.3fr);
  }

  .trs80-debugger {
    grid-template-areas:
      "registers disassembly"
      "keyboard display"
      "memory memory";
    grid-template-columns: minmax(240px, 0.85fr) minmax(300px, 1.3fr);
  }

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

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

  .panel {
    order: -1;
    position: static;
  }

  .tool-tabs {
    grid-template-columns: repeat(4, minmax(64px, 1fr));
  }

  .debugger {
    grid-template-areas:
      "registers"
      "basic"
      "disassembly"
      "memory"
      "source"
      "reference";
    grid-template-columns: 1fr;
  }

  .cpm-debugger {
    grid-template-areas:
      "registers"
      "disassembly"
      "io"
      "console"
      "trace";
    grid-template-columns: 1fr;
  }

  .trs80-debugger {
    grid-template-areas:
      "registers"
      "disassembly"
      "keyboard"
      "display"
      "memory";
    grid-template-columns: 1fr;
  }

  .memory-inspector {
    grid-template-columns: 1fr;
  }

  .resizable-window {
    resize: vertical;
  }
}

@media (max-width: 760px) {
  .shell {
    width: min(100vw - 20px, 1480px);
  }

  .controls {
    grid-template-columns: 1fr;
  }

  .register-grid,
  .basic-status {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .disassembly li {
    grid-template-columns: 44px 68px minmax(0, 1fr);
    gap: 6px;
  }
}

.spectrum-page-body {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: clamp(14px, 2vw, 22px);
  align-items: center;
  justify-items: center;
  min-height: 100vh;
  padding: clamp(14px, 2.4vw, 28px);
  overflow-x: hidden;
}

.spectrum-page-body .shell {
  width: min(1540px, 100%);
}

.spectrum-page-content {
  width: min(1540px, 100%);
}

.spectrum-page-content .machine-nav {
  width: 100%;
}

.spectrum-rom-control {
  grid-column: 1 / -1;
  display: grid;
  gap: 6px;
  color: #c9c9bd;
  font-size: 13px;
}

.spectrum-rom-control input {
  width: 100%;
  color: #d7e2d7;
  font: 12px/1.2 "SFMono-Regular", Consolas, monospace;
}

.spectrum-rom-control input::file-selector-button {
  margin-right: 8px;
  border: 1px solid rgba(241, 241, 232, 0.34);
  border-radius: 6px;
  background: var(--text);
  color: #151515;
  font: inherit;
  padding: 7px 10px;
}

.selector-body,
.cpm-page-body,
.trs80-page-body {
  display: block;
  min-height: 100vh;
  padding: clamp(14px, 2.4vw, 28px);
  background:
    linear-gradient(180deg, rgba(4, 7, 10, 0.72), rgba(17, 13, 11, 0.92)),
    #08090a;
  overflow-x: hidden;
}

.selector-shell {
  width: min(1180px, 100%);
  margin: 0 auto;
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}

.selector-hero {
  position: relative;
  min-height: clamp(360px, 62vh, 680px);
  overflow: hidden;
  border: 1px solid rgba(241, 241, 232, 0.18);
  border-radius: 8px;
  background: #07090b;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.48);
}

.selector-hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.selector-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(3, 5, 8, 0.68), rgba(3, 5, 8, 0.06) 42%, rgba(3, 5, 8, 0.56)),
    repeating-linear-gradient(180deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 4px);
  pointer-events: none;
}

.selector-overlay {
  position: relative;
  z-index: 1;
  display: grid;
  justify-items: center;
  align-content: start;
  min-height: inherit;
  padding: clamp(28px, 6vw, 72px) clamp(18px, 5vw, 60px);
  text-align: center;
}

.selector-kicker {
  margin: 0 0 8px;
  color: #f3d447;
  font: 700 14px/1.2 "SFMono-Regular", Consolas, monospace;
  text-transform: uppercase;
}

.selector-overlay h1 {
  max-width: 12ch;
  margin: 0;
  color: #fffbe8;
  font-size: clamp(42px, 8vw, 92px);
  line-height: 0.94;
  text-shadow: 0 8px 32px rgba(0, 0, 0, 0.85);
}

.machine-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(12px, 2vw, 18px);
}

.machine-link {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  min-height: 136px;
  border: 1px solid rgba(241, 241, 232, 0.18);
  border-radius: 8px;
  background: rgba(12, 16, 18, 0.92);
  color: var(--text);
  padding: 18px;
  text-decoration: none;
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.28);
}

.machine-link:hover,
.machine-link:focus-visible {
  border-color: rgba(243, 212, 71, 0.78);
  outline: none;
  transform: translateY(-1px);
}

.machine-link strong,
.machine-link small {
  grid-column: 2;
}

.machine-link strong {
  align-self: end;
  font-size: 24px;
  line-height: 1.05;
}

.machine-link small {
  align-self: start;
  color: #bbc4b7;
  font-size: 14px;
  line-height: 1.35;
}

.machine-screen {
  grid-row: 1 / span 2;
  display: grid;
  place-items: center;
  width: 96px;
  aspect-ratio: 4 / 3;
  border: 8px solid #2a2925;
  border-radius: 6px;
  background: #060606;
  box-shadow: inset 0 0 22px rgba(0, 0, 0, 0.85), 0 10px 24px rgba(0, 0, 0, 0.38);
}

.spectrum-screen span {
  width: 58px;
  height: 40px;
  background:
    linear-gradient(135deg, transparent 0 38%, #f3d447 38% 46%, #21c763 46% 54%, #16c7bd 54% 62%, #d946ef 62% 70%, transparent 70%),
    linear-gradient(180deg, #213fdd 0 34%, #d92d20 34% 66%, #111 66%);
  image-rendering: pixelated;
}

.cpm-screen {
  color: #5dff8b;
  font: 700 24px/1 "SFMono-Regular", Consolas, monospace;
  text-shadow: 0 0 12px rgba(93, 255, 139, 0.85);
}

.cpm-screen::after {
  content: "";
  width: 8px;
  height: 18px;
  margin-left: 4px;
  background: #5dff8b;
  box-shadow: 0 0 12px rgba(93, 255, 139, 0.85);
}

.trs80-screen {
  display: grid;
  grid-template-rows: auto auto;
  gap: 5px;
  color: #ffca6a;
  font: 700 14px/1 "SFMono-Regular", Consolas, monospace;
  text-shadow: 0 0 12px rgba(255, 202, 106, 0.82);
}

.trs80-screen span {
  display: block;
  grid-column: auto;
  border: 1px solid rgba(255, 202, 106, 0.5);
  padding: 4px 5px 3px;
}

.trs80-screen small {
  grid-column: auto;
  align-self: auto;
  color: #f3d447;
  font: 700 8px/1 "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0;
}

.ti85-screen {
  align-content: start;
  justify-items: center;
  gap: 5px;
  border: 5px solid #161b1c;
  border-radius: 12px 12px 16px 16px;
  background:
    linear-gradient(180deg, rgba(238, 247, 232, 0.1), transparent 28%),
    linear-gradient(180deg, #303a3b 0 45%, #111616 45% 100%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    inset 0 -10px 18px rgba(0, 0, 0, 0.34),
    0 10px 24px rgba(0, 0, 0, 0.38);
  padding: 9px 8px 8px;
}

.ti85-icon-lcd {
  display: grid;
  align-content: center;
  gap: 3px;
  width: 100%;
  height: 32px;
  border: 3px solid #0a0d0e;
  border-radius: 4px;
  background:
    linear-gradient(90deg, rgba(39, 58, 44, 0.42), transparent 34% 66%, rgba(39, 58, 44, 0.28)),
    #b5ceb1;
  box-shadow: inset 0 0 0 1px rgba(18, 32, 20, 0.36);
  padding: 6px 8px;
}

.ti85-icon-lcd i {
  display: block;
  height: 3px;
  border-radius: 2px;
  background: #293c33;
  opacity: 0.72;
}

.ti85-icon-lcd i:nth-child(1) {
  width: 54%;
}

.ti85-icon-lcd i:nth-child(2) {
  width: 72%;
}

.ti85-icon-lcd i:nth-child(3) {
  width: 44%;
}

.ti85-icon-softkeys {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3px;
  width: 100%;
}

.ti85-icon-softkeys i,
.ti85-icon-keypad i {
  display: block;
  border-radius: 3px;
  background: linear-gradient(180deg, #d8e0df, #758285);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.35), 0 1px 0 rgba(0, 0, 0, 0.65);
}

.ti85-icon-softkeys i {
  height: 7px;
}

.ti85-icon-keypad {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3px;
  width: 100%;
}

.ti85-icon-keypad i {
  height: 8px;
  background: linear-gradient(180deg, #252d2e, #070a0a);
}

.ti85-icon-keypad i:nth-child(1) {
  background: linear-gradient(180deg, #f0d178, #c49138);
}

.ti85-icon-keypad i:nth-child(2) {
  background: linear-gradient(180deg, #9dc0de, #4e78a0);
}

.ti85-icon-keypad i:nth-child(7),
.ti85-icon-keypad i:nth-child(8),
.ti85-icon-keypad i:nth-child(11) {
  background: linear-gradient(180deg, #aeb8bb, #6f7a7d);
}

.site-contact-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: min(1180px, 100%);
  margin: 0 auto;
  min-height: 68px;
  border: 1px solid rgba(93, 255, 139, 0.18);
  border-radius: 8px;
  background:
    repeating-linear-gradient(180deg, rgba(93, 255, 139, 0.035) 0 1px, transparent 1px 4px),
    rgba(6, 13, 9, 0.78);
  color: #bbc4b7;
  font: 700 13px/1.2 "SFMono-Regular", Consolas, monospace;
  text-transform: uppercase;
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.22);
}

.cpm-page-body .site-contact-footer {
  width: min(980px, 100%);
  margin-top: clamp(14px, 2vw, 22px);
}

.trs80-page-body .site-contact-footer {
  width: min(1100px, 100%);
  margin-top: clamp(14px, 2vw, 22px);
}

.site-contact-footer img {
  width: min(194px, 52vw);
  height: auto;
  image-rendering: pixelated;
  filter: drop-shadow(0 0 10px rgba(93, 255, 139, 0.56));
}

.machine-nav {
  width: min(980px, 100%);
  margin: 0 auto 14px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.machine-nav a {
  border: 1px solid rgba(241, 241, 232, 0.2);
  border-radius: 6px;
  color: var(--text);
  background: rgba(12, 16, 18, 0.86);
  padding: 9px 12px;
  text-decoration: none;
}

.cpm-shell {
  width: min(980px, 100%);
  margin: 0 auto;
}

.trs80-shell {
  width: min(1100px, 100%);
  margin: 0 auto;
}

.cpm-terminal-frame {
  display: grid;
  gap: 16px;
  border: 1px solid rgba(93, 255, 139, 0.28);
  border-radius: 8px;
  background: rgba(7, 12, 9, 0.92);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.48);
  padding: clamp(14px, 2vw, 22px);
}

.trs80-frame {
  display: grid;
  gap: 16px;
  border: 1px solid rgba(255, 202, 106, 0.3);
  border-radius: 8px;
  background: rgba(13, 11, 8, 0.94);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.48);
  padding: clamp(14px, 2vw, 22px);
}

.cpm-terminal-frame header,
.trs80-frame header {
  display: grid;
  gap: 2px;
}

.cpm-terminal-frame p,
.trs80-frame p {
  margin: 0;
  color: #5dff8b;
  font: 700 13px/1.2 "SFMono-Regular", Consolas, monospace;
  text-transform: uppercase;
}

.trs80-frame p {
  color: #ffca6a;
}

.cpm-terminal-frame h1,
.trs80-frame h1 {
  margin: 0;
  font-size: 28px;
}

.cpm-terminal-frame output,
.trs80-frame output {
  color: #bbc4b7;
  font: 13px/1.3 "SFMono-Regular", Consolas, monospace;
}

.cpm-terminal {
  min-height: min(58vh, 520px);
  margin: 0;
  overflow: auto;
  border: 1px solid rgba(93, 255, 139, 0.25);
  border-radius: 6px;
  background:
    repeating-linear-gradient(180deg, rgba(93, 255, 139, 0.05) 0 1px, transparent 1px 4px),
    #031006;
  color: #72ff98;
  font: 18px/1.45 "SFMono-Regular", Consolas, monospace;
  padding: 18px;
  white-space: pre-wrap;
  text-shadow: 0 0 14px rgba(93, 255, 139, 0.42);
}

.cpm-terminal:focus-visible {
  outline: 3px solid #f3d447;
  outline-offset: 3px;
}

.trs80-screen-view {
  min-height: min(58vh, 500px);
  margin: 0;
  overflow: auto;
  border: 1px solid rgba(255, 202, 106, 0.26);
  border-radius: 6px;
  background:
    repeating-linear-gradient(180deg, rgba(255, 202, 106, 0.045) 0 1px, transparent 1px 4px),
    #100b03;
  color: #ffd17b;
  font: clamp(12px, 1.7vw, 18px)/1.45 "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0;
  padding: clamp(12px, 2vw, 18px);
  white-space: pre;
  text-shadow: 0 0 12px rgba(255, 202, 106, 0.38);
}

.trs80-screen-view:focus-visible {
  outline: 3px solid #16c7bd;
  outline-offset: 3px;
}

.cpm-controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.trs80-controls {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.cpm-profile-control,
.trs80-rom-control {
  display: grid;
  gap: 4px;
  color: #bbc4b7;
  font: 12px/1.2 "SFMono-Regular", Consolas, monospace;
}

.trs80-rom-control {
  grid-column: span 6;
}

.trs80-rom-control input {
  width: 100%;
  color: #bbc4b7;
  font: 12px/1.2 "SFMono-Regular", Consolas, monospace;
}

.trs80-rom-control input::file-selector-button {
  border: 1px solid rgba(255, 202, 106, 0.34);
  border-radius: 5px;
  background: #ffd17b;
  color: #15100a;
  font: 700 11px/1.2 "Inter", "Avenir Next", system-ui, sans-serif;
  margin-right: 8px;
  padding: 5px 8px;
}

.trs80-type-panel,
.trs80-cassette-panel {
  display: grid;
  gap: 10px;
  border-top: 1px solid rgba(255, 202, 106, 0.22);
  padding-top: 14px;
}

.trs80-type-panel label,
.trs80-cassette-panel label {
  color: #bbc4b7;
  font: 12px/1.2 "SFMono-Regular", Consolas, monospace;
}

.trs80-type-panel textarea {
  width: 100%;
  min-height: 112px;
  resize: vertical;
  border: 1px solid rgba(255, 202, 106, 0.26);
  border-radius: 6px;
  background: #100b03;
  color: #ffd17b;
  font: 13px/1.35 "SFMono-Regular", Consolas, monospace;
  padding: 10px;
}

.trs80-type-panel textarea:focus-visible {
  outline: 3px solid #16c7bd;
  outline-offset: 2px;
}

.trs80-type-controls {
  display: grid;
  grid-template-columns: 2fr repeat(3, minmax(54px, 1fr));
  gap: 10px;
}

.trs80-cassette-panel input {
  color: #ffd17b;
  font: 12px/1.2 "SFMono-Regular", Consolas, monospace;
}

.trs80-cassette-panel input::file-selector-button {
  margin-right: 10px;
  border: 1px solid rgba(255, 202, 106, 0.32);
  border-radius: 6px;
  background: #1a1206;
  color: #ffd17b;
  font: inherit;
  padding: 7px 10px;
}

.trs80-cassette-controls {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 10px;
}

.cpm-controls button:disabled,
.trs80-controls button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

.cpm-file-panel {
  display: grid;
  gap: 10px;
  border-top: 1px solid rgba(93, 255, 139, 0.22);
  padding-top: 14px;
}

.cpm-file-panel header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.cpm-file-panel header p {
  margin: 0;
}

.cpm-file-panel header button {
  min-height: 32px;
}

.cpm-controls select,
.cpm-file-panel select {
  width: 100%;
  border: 1px solid rgba(93, 255, 139, 0.25);
  border-radius: 6px;
  background: #031006;
  color: #72ff98;
  font: 14px/1.4 "SFMono-Regular", Consolas, monospace;
  padding: 8px;
}

.cpm-file-panel header select {
  max-width: 180px;
}

.cpm-file-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.ti85-page-body {
  display: block;
  min-height: 100vh;
  padding: 18px;
  background:
    linear-gradient(90deg, rgba(24, 24, 23, 0.96), rgba(12, 15, 15, 0.96)),
    #111312;
}

.ti85-shell {
  width: min(1560px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

.ti85-workspace {
  width: 100%;
  display: grid;
  justify-items: center;
  gap: 16px;
}

.ti85-workspace.docs-open {
  grid-template-columns: minmax(420px, 520px) minmax(520px, 1fr);
  align-items: start;
  justify-items: stretch;
}

.ti85-workspace.docs-open .ti85-frame {
  position: sticky;
  top: 18px;
}

.ti85-doc-reader[hidden],
.ti85-docs[hidden] {
  display: none;
}

.ti85-doc-reader {
  position: sticky;
  top: 18px;
  height: calc(100vh - 36px);
  min-height: 640px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(174, 205, 176, 0.26);
  border-radius: 8px;
  background: #f7f5ef;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
}

.ti85-doc-reader-bar {
  min-height: 62px;
  display: grid;
  grid-template-columns: minmax(150px, 1fr) auto auto;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid #c9c5ba;
  background: #f7f5ef;
  color: #142d55;
  padding: 10px 12px;
}

.ti85-doc-reader-bar > div:first-child {
  display: grid;
  gap: 2px;
}

.ti85-doc-reader-bar small {
  color: #667085;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ti85-doc-reader-bar strong {
  font-size: 14px;
}

.ti85-doc-reader-bar nav,
.ti85-doc-reader-actions {
  display: flex;
  gap: 6px;
}

.ti85-doc-reader-bar button,
.ti85-doc-reader-bar a {
  min-height: 34px;
  display: inline-grid;
  place-items: center;
  border: 1px solid #9aa5b5;
  border-radius: 5px;
  background: transparent;
  color: #1a3a6b;
  padding: 7px 9px;
  font: 750 12px/1.2 "Inter", "Avenir Next", system-ui, sans-serif;
  text-decoration: none;
}

.ti85-doc-reader-bar button[aria-pressed="true"] {
  border-color: #1a3a6b;
  background: #1a3a6b;
  color: #ffffff;
}

.ti85-doc-reader-bar button:hover,
.ti85-doc-reader-bar a:hover {
  border-color: #1a3a6b;
}

.ti85-doc-reader iframe {
  width: 100%;
  height: auto;
  min-height: 0;
  flex: 1;
  display: block;
  border: 0;
  background: #f7f5ef;
}

.ti85-doc-handle {
  display: none;
}

.ti85-workspace.docs-parked .ti85-doc-reader {
  display: none;
}

.ti85-frame {
  display: grid;
  gap: 14px;
  justify-self: center;
  width: min(520px, 100%);
  margin: 0 auto;
  border: 1px solid rgba(184, 198, 189, 0.2);
  border-radius: 8px;
  background: linear-gradient(180deg, #202423 0%, #111414 100%);
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.34);
  padding: clamp(14px, 3vw, 22px);
}

.ti85-frame header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 2px 12px;
}

.ti85-frame header p {
  margin: 0;
  color: #b8c6bd;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.ti85-frame h1 {
  font-size: 36px;
}

.ti85-frame header output {
  grid-column: 1 / -1;
  min-height: 22px;
  color: #d8e5dd;
  font: 13px/1.35 "SFMono-Regular", Consolas, monospace;
}

.ti85-lcd-bezel {
  width: 100%;
  border: clamp(10px, 2.6vw, 18px) solid #070909;
  border-radius: 7px;
  background: #0b0e0e;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06), 0 18px 45px rgba(0, 0, 0, 0.32);
  padding: clamp(8px, 2vw, 14px);
}

#ti85Screen {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 1;
  image-rendering: pixelated;
  background: #aecdb0;
}

#ti85Screen:focus-visible {
  outline: 3px solid #16c7bd;
  outline-offset: 5px;
}

.ti85-controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr)) minmax(180px, 1.35fr);
  gap: 10px;
}

.ti85-controls button {
  background: #dce7dd;
  border-color: rgba(174, 205, 176, 0.42);
}

.ti85-controls button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

.ti85-keypad {
  display: grid;
  gap: 8px;
  padding: 12px 6px 4px;
}

.ti85-key-row {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: clamp(6px, 1.7vw, 10px);
  align-items: end;
}

.ti85-key {
  position: relative;
  display: grid;
  grid-template-rows: 13px minmax(31px, auto);
  align-items: stretch;
  min-width: 0;
  min-height: 48px;
  padding: 0;
  border: 1px solid #050606;
  border-radius: 6px;
  background: linear-gradient(180deg, #343939, #171a1a);
  color: #f3f6f4;
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.18), inset 0 -3px rgba(0, 0, 0, 0.35), 0 2px 0 #050606;
  font: inherit;
  touch-action: none;
  user-select: none;
}

.ti85-key:hover:not(:disabled),
.ti85-key:focus-visible {
  border-color: #95d7d1;
  outline: none;
}

.ti85-key:active:not(:disabled) {
  transform: translateY(2px);
  box-shadow: inset 0 2px rgba(0, 0, 0, 0.28), 0 0 0 #050606;
}

.ti85-key:disabled {
  cursor: not-allowed;
  opacity: 0.58;
}

.ti85-key-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  min-width: 0;
  padding: 0 4px 1px;
  font-size: 9px;
  font-weight: 800;
  line-height: 1;
  color: #d7d6a5;
}

.ti85-key-alpha {
  color: #9fc7e8;
}

.ti85-key-label {
  display: grid;
  place-items: center;
  min-width: 0;
  padding: 4px 3px 7px;
  overflow-wrap: anywhere;
  font-size: 16px;
  font-weight: 850;
  line-height: 1;
}

.ti85-key.function {
  min-height: 42px;
  grid-template-rows: 12px minmax(27px, auto);
  background: linear-gradient(180deg, #262b2d, #101313);
}

.ti85-key.modifier.second {
  background: linear-gradient(180deg, #f3d990, #c68b35);
  color: #fff8df;
}

.ti85-key.modifier.alpha {
  background: linear-gradient(180deg, #9fc3e4, #4b78a3);
  color: #f5fbff;
}

.ti85-key.number {
  background: linear-gradient(180deg, #aab6bd, #66737b);
  color: #ffffff;
}

.ti85-key.operator,
.ti85-key.enter {
  background: linear-gradient(180deg, #2b3030, #101212);
}

.ti85-key.arrow {
  min-height: 42px;
  background: linear-gradient(180deg, #a7b0b4, #717b81);
}

.ti85-key.on {
  background: linear-gradient(180deg, #20282a, #0a0d0d);
}

.ti85-rom-control {
  display: grid;
  align-items: center;
  gap: 6px;
  color: #b8c6bd;
  font-size: 13px;
}

.ti85-rom-control input {
  width: 100%;
  color: #d7e2d7;
  font: 12px/1.2 "SFMono-Regular", Consolas, monospace;
}

.ti85-rom-control input::file-selector-button {
  margin-right: 8px;
  border: 1px solid rgba(174, 205, 176, 0.42);
  border-radius: 6px;
  background: #dce7dd;
  color: #151515;
  font: inherit;
  padding: 7px 10px;
}

.ti85-debug-drawer {
  justify-self: center;
  width: min(1180px, calc(100vw - 36px));
  margin-top: 0;
  border-color: rgba(174, 205, 176, 0.24);
  background: rgba(9, 13, 12, 0.72);
}

.ti85-docs {
  justify-self: center;
  width: min(760px, 100%);
  display: grid;
  grid-template-columns: minmax(190px, 0.7fr) minmax(0, 1.3fr);
  gap: 18px;
  border: 1px solid rgba(174, 205, 176, 0.22);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(174, 205, 176, 0.08), transparent 45%),
    rgba(9, 13, 12, 0.78);
  padding: 18px;
}

.ti85-docs-intro {
  align-self: center;
}

.ti85-docs-intro p,
.ti85-docs-intro h2,
.ti85-docs-intro span,
.ti85-doc-links h3,
.ti85-doc-links small {
  margin: 0;
}

.ti85-docs-intro p,
.ti85-doc-links small {
  color: #95d7d1;
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ti85-docs-intro h2 {
  margin-block: 4px 8px;
  font-size: 22px;
  line-height: 1.1;
}

.ti85-docs-intro span {
  color: #b8c6bd;
  font-size: 13px;
  line-height: 1.45;
}

.ti85-doc-links {
  display: grid;
  gap: 8px;
}

.ti85-doc-links article {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  border: 1px solid rgba(174, 205, 176, 0.16);
  border-radius: 7px;
  background: rgba(174, 205, 176, 0.045);
  padding: 12px;
}

.ti85-doc-links h3 {
  margin-top: 3px;
  color: #f1f1e8;
  font-size: 15px;
}

.ti85-doc-actions {
  display: flex;
  gap: 6px;
}

.ti85-doc-actions a,
.ti85-doc-actions button {
  min-height: 34px;
  display: inline-grid;
  place-items: center;
  border: 1px solid rgba(149, 215, 209, 0.42);
  border-radius: 6px;
  background: rgba(22, 199, 189, 0.12);
  color: #e7fffc;
  padding: 7px 10px;
  font-size: 12px;
  font-weight: 800;
  text-decoration: none;
}

.ti85-doc-actions a:last-child {
  border-color: rgba(174, 205, 176, 0.22);
  background: transparent;
  color: #b8c6bd;
}

.ti85-doc-actions a:hover,
.ti85-doc-actions button:hover {
  border-color: #95d7d1;
  background: rgba(22, 199, 189, 0.2);
}

.ti85-doc-actions a:focus-visible,
.ti85-doc-actions button:focus-visible {
  outline: 3px solid #16c7bd;
  outline-offset: 2px;
}

.ti85-debugger {
  grid-template-areas:
    "registers disassembly memory"
    "machine disassembly memory"
    "keyboard display memory";
  grid-template-columns: minmax(250px, 0.85fr) minmax(320px, 1.1fr) minmax(330px, 1fr);
}

.ti85-machine-card {
  grid-area: machine;
}

.ti85-keyboard-card {
  grid-area: keyboard;
}

.ti85-display-card {
  grid-area: display;
}

.ti85-legal-note {
  justify-self: center;
  width: min(1180px, calc(100vw - 36px));
  margin: 0;
  border: 1px solid rgba(174, 205, 176, 0.18);
  border-radius: 8px;
  background: rgba(7, 10, 10, 0.62);
  color: #b8c6bd;
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.45;
}

@media (max-width: 1100px) {
  body.doc-reader-open {
    overflow: hidden;
  }

  .ti85-workspace.docs-open {
    grid-template-columns: 1fr;
  }

  .ti85-workspace.docs-open .ti85-frame {
    position: static;
  }

  .ti85-doc-reader {
    position: fixed;
    inset: 0 0 0 auto;
    z-index: 100;
    width: min(94vw, 720px);
    height: 100dvh;
    min-height: 0;
    border-width: 0 0 0 1px;
    border-radius: 0;
    transform: translateX(0);
    transition: transform 220ms ease-out;
    will-change: transform;
  }

  .ti85-workspace.docs-parked .ti85-doc-reader {
    display: flex;
    pointer-events: none;
    transform: translateX(calc(100% + 2px));
  }

  .ti85-doc-handle:not([hidden]) {
    position: fixed;
    top: max(116px, calc(env(safe-area-inset-top) + 92px));
    right: -1px;
    z-index: 99;
    width: 26px;
    min-height: 88px;
    display: grid;
    place-items: center;
    gap: 2px;
    border: 1px solid rgba(174, 205, 176, 0.52);
    border-right: 0;
    border-radius: 7px 0 0 7px;
    background: #142d55;
    color: #fff;
    padding: 6px 2px;
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.36);
    cursor: pointer;
  }

  .ti85-doc-handle span {
    font: 800 18px/1 system-ui, sans-serif;
  }

  .ti85-doc-handle strong {
    font: 750 9px/1 "Inter", "Avenir Next", system-ui, sans-serif;
    letter-spacing: 0.02em;
    writing-mode: vertical-rl;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ti85-doc-reader {
    transition: none;
  }
}

@media (max-width: 780px) {
  .selector-hero {
    min-height: 520px;
  }

  .selector-hero-image {
    object-position: center bottom;
  }

  .machine-grid {
    grid-template-columns: 1fr;
  }

  .machine-link {
    grid-template-columns: 82px minmax(0, 1fr);
    min-height: 124px;
    padding: 14px;
  }

  .machine-screen {
    width: 82px;
  }

  .machine-link strong {
    font-size: 20px;
  }

  .site-contact-footer {
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px;
  }

  .cpm-controls,
  .trs80-controls,
  .ti85-controls {
    grid-template-columns: 1fr;
  }

  .trs80-rom-control,
  .ti85-rom-control {
    grid-column: auto;
  }

  .trs80-type-controls {
    grid-template-columns: 1fr 1fr;
  }

  .trs80-cassette-controls {
    grid-template-columns: 1fr;
  }

  .cpm-file-controls {
    grid-template-columns: 1fr;
  }

  .ti85-debugger {
    grid-template-columns: 1fr;
    grid-template-areas:
      "registers"
      "disassembly"
      "machine"
      "keyboard"
      "display"
      "memory";
  }

  .ti85-docs {
    grid-template-columns: 1fr;
  }

  .ti85-doc-reader-bar {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .ti85-doc-reader-bar > div:first-child {
    grid-column: 1 / -1;
  }

  .ti85-frame h1 {
    font-size: 30px;
  }

  .ti85-keypad {
    gap: 7px;
    padding-inline: 0;
  }

  .ti85-key-row {
    gap: 6px;
  }

  .ti85-key {
    min-height: 50px;
  }

  .ti85-key-label {
    font-size: 16px;
  }

  .ti85-key-top {
    font-size: 9px;
  }
}

@media (max-width: 560px) {
  .ti85-doc-reader-bar {
    grid-template-columns: 1fr;
  }

  .ti85-doc-reader-bar nav,
  .ti85-doc-reader-actions {
    width: 100%;
    flex-wrap: wrap;
  }

  .ti85-doc-reader-bar nav > button,
  .ti85-doc-reader-actions > * {
    flex: 1 1 auto;
  }
}

@media (max-width: 430px) {
  .ti85-page-body {
    padding: 6px;
  }

  .ti85-shell {
    gap: 6px;
  }

  .ti85-docs {
    gap: 12px;
    padding: 13px;
  }

  .ti85-doc-links article {
    grid-template-columns: 1fr;
  }

  .ti85-doc-actions button {
    flex: 1;
  }

  .machine-nav {
    margin-bottom: 4px;
    gap: 5px;
  }

  .machine-nav a {
    min-height: 30px;
    padding: 6px 8px;
    font-size: 12px;
  }

  .ti85-frame {
    gap: 9px;
    padding: clamp(9px, 2.6vw, 12px);
  }

  .ti85-frame header {
    gap: 0 8px;
  }

  .ti85-frame header p {
    font-size: 11px;
  }

  .ti85-frame h1 {
    font-size: 24px;
  }

  .ti85-frame header output {
    min-height: 18px;
    font-size: 11px;
  }

  .ti85-lcd-bezel {
    border-width: clamp(7px, 2vw, 9px);
    padding: clamp(6px, 1.8vw, 8px);
  }

  .ti85-keypad {
    gap: 5px;
    padding: 6px 0 2px;
  }

  .ti85-key-row {
    gap: 5px;
  }

  .ti85-key {
    grid-template-rows: 9px minmax(24px, auto);
    min-height: clamp(34px, 8.8vw, 38px);
    border-radius: 5px;
  }

  .ti85-key.function,
  .ti85-key.arrow {
    grid-template-rows: 9px minmax(23px, auto);
    min-height: clamp(33px, 8.4vw, 37px);
  }

  .ti85-key-top {
    padding: 0 3px 1px;
    font-size: 7px;
  }

  .ti85-key-label {
    padding: 2px 2px 4px;
    font-size: clamp(12px, 3.6vw, 14px);
  }

  .ti85-key[data-ti85-key="CUSTOM"] .ti85-key-label {
    overflow-wrap: normal;
    white-space: nowrap;
    font-size: clamp(11px, 3.25vw, 13px);
  }

  .ti85-controls {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 7px;
  }

  .ti85-controls button {
    min-height: 34px;
    padding-inline: 4px;
    font-size: 13px;
  }

  .ti85-rom-control {
    grid-column: 1 / -1;
    gap: 4px;
    font-size: 11px;
  }

  .ti85-rom-control input {
    font-size: 11px;
  }

  .ti85-debug-drawer {
    width: min(1180px, calc(100vw - 12px));
  }
}

/* Play first: screen, Spectrum keyboard, loaders, then optional tools. */
.spectrum-play-shell{width:min(980px,100%);margin:0 auto;display:grid;gap:14px}
.spectrum-play-console{display:grid;gap:12px}
.spectrum-screen-window{min-width:0;min-height:0;overflow:hidden}
.spectrum-screen-header{min-height:42px}
.spectrum-screen-header output{margin-left:auto}
.spectrum-play-console .screen-wrap{min-height:0;background:#050505}
.spectrum-play-console #screen,.spectrum-play-console #rasterOverlay{width:100%;max-height:none}
.spectrum-keyboard-panel,.quick-loader-card,.advanced-tools,.advanced-control-card{border:1px solid var(--line);border-radius:8px;background:rgba(10,13,12,.78)}
.spectrum-keyboard-panel{display:grid;gap:8px;padding:10px}
.spectrum-keyboard-panel>header{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.spectrum-keyboard-panel h2,.quick-loader-card h2,.advanced-control-card h2{margin:0;font-size:14px}
.spectrum-keyboard-panel p{margin:0;color:var(--muted);font-size:11px}
.spectrum-keyboard{display:grid;gap:clamp(3px,.55vw,6px);touch-action:none;user-select:none;-webkit-user-select:none}
.spectrum-key-row{display:grid;grid-template-columns:repeat(10,minmax(0,1fr));gap:clamp(3px,.55vw,6px)}
.spectrum-key{min-width:0;min-height:clamp(42px,6.3vw,58px);border:1px solid #050505;border-radius:5px;background:linear-gradient(180deg,#3a3a3a,#171717);color:#f2efe6;box-shadow:inset 0 1px rgba(255,255,255,.14),inset 0 -3px rgba(0,0,0,.48),0 2px 0 #050505;padding:2px;font:800 clamp(9px,1.55vw,13px)/1 "Arial Black","Helvetica Neue",Arial,sans-serif;letter-spacing:-.02em;touch-action:none;user-select:none;-webkit-user-select:none}
.spectrum-key.modifier{font-size:clamp(6.5px,1.05vw,9px);line-height:.95}.spectrum-key[data-spectrum-key="CAPS SHIFT"]{color:#d9c23a}.spectrum-key[data-spectrum-key="SYMBOL SHIFT"]{color:#d34b2b}.spectrum-key[data-spectrum-key="ENTER"],.spectrum-key[data-spectrum-key="SPACE"]{font-size:clamp(8px,1.3vw,12px)}.spectrum-key-row:nth-child(3){grid-template-columns:repeat(9,minmax(0,1fr)) 1.35fr}.spectrum-key-row:nth-child(4){grid-template-columns:1.35fr repeat(7,minmax(0,1fr)) 1.45fr 1.6fr}
.spectrum-key.is-pressed,.spectrum-key:active{transform:translateY(2px);background:linear-gradient(180deg,#181818,#303030);box-shadow:inset 0 2px rgba(0,0,0,.55)}
.spectrum-key.is-latched{border-color:#16c7bd;outline:2px solid rgba(22,199,189,.62);background:linear-gradient(180deg,#1c4945,#102522);color:#fff}
.quick-loaders{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.quick-loader-card{display:grid;align-content:start;gap:8px;min-width:0;padding:12px}
.play-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.advanced-tools{overflow:hidden}
.advanced-tools>summary{display:flex;align-items:center;justify-content:space-between;gap:12px;cursor:pointer;list-style:none;padding:12px 14px}
.advanced-tools>summary::-webkit-details-marker{display:none}
.advanced-tools>summary span{font-weight:850}
.advanced-tools>summary strong{color:var(--muted);font-size:12px;font-weight:600;text-align:right}
.advanced-tools-body{display:grid;gap:12px;border-top:1px solid var(--line);padding:12px}
.advanced-control-card{display:grid;gap:10px;padding:12px}
.advanced-tool-tabs{grid-template-columns:repeat(3,minmax(0,1fr))}
.spectrum-page-content>.spectrum-seo-hero{margin-top:clamp(22px,4vw,42px)}
@media(max-width:760px){
.spectrum-page-body{padding:8px;align-items:start}.spectrum-page-content{width:100%}.spectrum-play-shell{width:100%;gap:8px}.spectrum-play-console{gap:8px}.spectrum-keyboard-panel{padding:6px}.spectrum-keyboard-panel>header{display:grid;gap:3px}.spectrum-keyboard-panel p{font-size:10px}.spectrum-keyboard,.spectrum-key-row{gap:3px}.spectrum-key{min-height:clamp(34px,10vw,42px);border-radius:4px;padding:1px;font-size:clamp(9px,3.2vw,12px)}.spectrum-key.modifier{font-size:clamp(6px,1.9vw,8px)}.quick-loaders{grid-template-columns:1fr}.play-controls{grid-template-columns:repeat(3,minmax(0,1fr))}.play-controls button{min-height:36px;padding-inline:5px;font-size:12px}.advanced-tools>summary{align-items:start}.advanced-tools>summary strong{max-width:54%;font-size:10px}.advanced-tool-tabs{grid-template-columns:1fr}}
@media(max-width:430px){.spectrum-page-body{padding:4px}.spectrum-screen-header{padding:6px 8px}.spectrum-keyboard-panel{border-radius:6px;padding:5px}.spectrum-keyboard-panel h2{font-size:12px}.spectrum-keyboard-panel p{display:none}.spectrum-key{min-height:32px;font-size:clamp(8px,2.8vw,10px)}.spectrum-key.modifier{font-size:clamp(5.5px,1.9vw,7px)}.quick-loader-card{padding:9px}}

.remote-loader{display:grid;gap:6px;margin-top:4px;padding-top:8px;border-top:1px solid var(--line)}
.remote-loader>label{font-size:12px;color:var(--muted)}
.remote-loader-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:7px;align-items:center}
.remote-loader-row input[type="url"]{min-width:0;width:100%}
.remote-loader-row button{white-space:nowrap}
.remote-loader-row button:disabled{opacity:.55;cursor:wait}
@media(max-width:430px){.remote-loader-row{grid-template-columns:1fr}.remote-loader-row button{width:100%}}

.quick-loaders{grid-template-columns:1fr}
.media-loader-card{gap:10px}
.media-loader-help{margin:0;color:var(--muted);font-size:12px;line-height:1.45}
.media-file-loader{display:grid;gap:6px}
.media-file-loader>label{font-size:12px;color:var(--muted)}
.media-file-label{font:12px/1.35 "SFMono-Regular",Consolas,monospace;overflow-wrap:anywhere}

.media-status{display:block;margin-top:4px;padding:10px 12px;border:1px solid rgba(255,107,95,.7);border-radius:6px;background:rgba(92,20,18,.38);color:#ff8a80;font-size:clamp(17px,2vw,22px);font-weight:800;line-height:1.3;overflow-wrap:anywhere}
.media-status[data-state="info"]{border-color:rgba(22,199,189,.55);background:rgba(13,74,70,.3);color:var(--text);font-weight:700}
.media-status[hidden]{display:none}

.audio-start-gate{grid-area:1 / 1;z-index:3;align-self:stretch;justify-self:stretch;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;border:0;border-radius:0;background:rgba(0,0,0,.78);color:#f2efe6;padding:24px;text-align:center;touch-action:manipulation}
.audio-start-gate[hidden]{display:none}
.audio-start-gate span{font-size:clamp(20px,4vw,34px);font-weight:900;line-height:1.05}
.audio-start-gate small{max-width:28rem;color:#d9d8cc;font-size:clamp(12px,2vw,16px);font-weight:700;line-height:1.3}
.audio-start-gate:focus-visible{outline:4px solid #f3d447;outline-offset:-6px}
.audio-start-gate:disabled{cursor:wait;opacity:.92}


/* Original 48K key legends: tiny, colourful, and gloriously overcrowded. */
.spectrum-keyboard{display:flex;flex-direction:column;gap:clamp(3px,.45vw,5px);padding:clamp(6px,.9vw,10px);border:1px solid #171515;border-radius:8px;background:linear-gradient(#3b3939,#292727);box-shadow:inset 0 1px rgba(255,255,255,.08),inset 0 -4px rgba(0,0,0,.25);touch-action:none;user-select:none;-webkit-user-select:none}
.spectrum-key-row{display:flex;gap:clamp(3px,.5vw,6px);align-items:stretch}
.spectrum-key-cell{display:flex;flex:1 1 0;min-width:0;flex-direction:column}
.spectrum-key-row:nth-child(3) .spectrum-key-cell:last-child{flex:1.28 1 0}
.spectrum-key-row:nth-child(4) .spectrum-key-cell:nth-child(1){flex:1.35 1 0}
.spectrum-key-row:nth-child(4) .spectrum-key-cell:nth-child(9){flex:1.12 1 0}
.spectrum-key-row:nth-child(4) .spectrum-key-cell:nth-child(10){flex:1.55 1 0}
.spectrum-key-top,.spectrum-key-bottom{min-width:0;display:flex;align-items:center;justify-content:center;gap:2px;white-space:nowrap;overflow:visible;font-family:Arial,"Helvetica Neue",sans-serif;font-weight:900;text-align:center;pointer-events:none}
.spectrum-key-top{height:clamp(14px,2vw,19px);flex-direction:column;gap:0;justify-content:flex-end;padding-bottom:2px}
.spectrum-key-bottom{height:clamp(11px,1.65vw,16px);align-items:flex-start;padding-top:3px;color:#e06d56;font-size:clamp(6px,.86vw,8px);line-height:1;letter-spacing:.02em}
.legend{display:block;font-size:clamp(6px,.86vw,8px);line-height:.92;letter-spacing:-.015em}
.legend.green{color:#58c67a}.legend.blue{color:#49a9df}.legend.red{color:#eb715c}.legend.magenta{color:#eb78d2}.legend.cyan{color:#71d8db}.legend.yellow{color:#f3db5d}.legend.white,.legend.arrow{color:#f5f1e9}.legend.black{color:#151515;background:#f1f0ea;padding:0 2px;border-radius:1px}
.spectrum-key{position:relative;display:block;width:100%;height:clamp(44px,5.8vw,56px);min-width:0;min-height:0;border:1px solid #0a0909;border-radius:4px;background:linear-gradient(180deg,#464343 0%,#343131 44%,#262424 100%);box-shadow:inset 0 1px rgba(255,255,255,.15),inset 0 -4px rgba(0,0,0,.56),0 2px 1px rgba(0,0,0,.7);color:#f6f3eb;padding:0;font-family:Arial,"Helvetica Neue",sans-serif;font-weight:900;letter-spacing:0;overflow:hidden;touch-action:none;user-select:none;-webkit-user-select:none}
.key-main{position:absolute;left:10%;top:22%;font-size:clamp(17px,2.4vw,23px);line-height:1}
.key-keyword{position:absolute;left:5%;right:5%;bottom:8%;font-size:clamp(7px,1.04vw,10px);line-height:1;text-align:center;white-space:nowrap}
.key-symbol{position:absolute;right:8%;top:40%;color:#d96b55;font-size:clamp(6px,.94vw,9px);line-height:1;font-weight:900;white-space:nowrap}
.key-mosaic{position:absolute;right:9%;top:15%;display:grid;grid-template-columns:repeat(2,clamp(4px,.62vw,6px));grid-template-rows:repeat(2,clamp(4px,.62vw,6px));width:clamp(8px,1.24vw,12px);height:clamp(8px,1.24vw,12px);background:#343131}
.key-mosaic i{display:block;background:#343131}.key-mosaic i.on{background:#f2efe6}
.key-special-main{display:flex;height:100%;align-items:center;justify-content:center;text-align:center;font-size:clamp(8px,1.14vw,11px);line-height:1.05;letter-spacing:-.01em}
.special-symbol .key-special-main{color:#df705c;font-size:clamp(6px,.84vw,8px)}.special-caps .key-special-main,.special-space .key-special-main,.special-enter .key-special-main{font-size:clamp(7px,1.04vw,10px)}
.spectrum-key[data-spectrum-key="CAPS SHIFT"]{color:#f6f3eb}.spectrum-key[data-spectrum-key="SYMBOL SHIFT"]{color:#df705c}
.spectrum-key.is-pressed,.spectrum-key:active{transform:translateY(2px);background:linear-gradient(180deg,#282626,#3a3737);box-shadow:inset 0 2px rgba(0,0,0,.55)}
.spectrum-key.is-latched{border-color:#16c7bd;outline:2px solid rgba(22,199,189,.62);background:linear-gradient(180deg,#1c4945,#102522)}
@media(max-width:760px){
.spectrum-keyboard{gap:3px;padding:5px 4px}.spectrum-key-row{gap:3px}
.spectrum-key-top{height:12px;padding-bottom:1px}.spectrum-key-bottom{height:10px;padding-top:2px}
.legend,.spectrum-key-bottom{font-size:clamp(4.8px,1.42vw,6px)}
.spectrum-key{height:clamp(38px,10vw,42px)}
.key-main{left:8%;top:23%;font-size:clamp(13px,4.2vw,17px)}
.key-keyword{font-size:clamp(5.2px,1.72vw,7px);bottom:7%}
.key-symbol{right:6%;top:40%;font-size:clamp(4.8px,1.55vw,6px)}
.key-mosaic{right:6%;top:13%;grid-template-columns:repeat(2,clamp(3px,1.05vw,4px));grid-template-rows:repeat(2,clamp(3px,1.05vw,4px));width:clamp(6px,2.1vw,8px);height:clamp(6px,2.1vw,8px)}
.key-special-main{font-size:clamp(5.5px,1.8vw,7px)}.special-symbol .key-special-main{font-size:clamp(4.5px,1.45vw,5.5px)}.special-caps .key-special-main,.special-space .key-special-main,.special-enter .key-special-main{font-size:clamp(5px,1.65vw,6.5px)}
}
@media(max-width:430px){
.spectrum-keyboard-panel{padding:4px}.spectrum-keyboard{padding:4px 2px}.spectrum-key-row{gap:2px}
.spectrum-key-top{height:11px}.spectrum-key-bottom{height:9px}
.legend,.spectrum-key-bottom{font-size:4.8px}
.spectrum-key{height:38px;border-radius:3px}
.key-main{font-size:14px}.key-keyword{font-size:5.2px}.key-symbol{font-size:4.8px}
}


/* The real rubber keyboard staggers its middle rows; its mosaic legends are dark cuts in a white square. */
.spectrum-key-row:nth-child(2){padding-left:4%}
.spectrum-key-row:nth-child(3){padding-left:6%}
.key-mosaic{right:9%;top:13%;grid-template-columns:repeat(2,clamp(6px,.9vw,9px));grid-template-rows:repeat(2,clamp(6px,.9vw,9px));width:clamp(12px,1.8vw,18px);height:clamp(12px,1.8vw,18px);background:#f2efe6}
.key-mosaic i{background:#f2efe6}.key-mosaic i.on{background:#343131}
@media(max-width:760px){.key-mosaic{right:6%;top:12%;grid-template-columns:repeat(2,clamp(4px,1.3vw,5px));grid-template-rows:repeat(2,clamp(4px,1.3vw,5px));width:clamp(8px,2.6vw,10px);height:clamp(8px,2.6vw,10px)}}