* {
  box-sizing: border-box;
}

:root {
  --paper: #000000;
  --ink: #00ff66;
  --muted: #9ef7b9;
  --rule: rgb(0 255 102 / 34%);
  --accent: #00ff66;
  --white: #ffffff;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: #050505;
  color: #fff;
  font-family: "Helvetica Neue", Helvetica, Arial, "Liberation Sans", sans-serif;
  -webkit-font-smoothing: antialiased;
}

button,
input,
select {
  font: inherit;
}

button,
input[type="number"],
select {
  min-height: 36px;
  border: 2px solid var(--ink);
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
}

button {
  padding: 6px 10px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  touch-action: manipulation;
  transition:
    background-color 140ms ease,
    color 140ms ease,
    transform 140ms ease,
    box-shadow 140ms ease;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

button:not(:disabled):hover,
button:not(:disabled):focus-visible {
  background: var(--accent);
  color: var(--paper);
  box-shadow: 4px 4px 0 var(--muted);
  outline: 0;
  transform: translate(-1px, -1px);
}

.preview-surface {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  background: #050505;
  overflow: hidden;
}

.preview-surface.controls-hidden {
  grid-template-columns: minmax(0, 1fr);
}

.preview-stage {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px;
  overflow: hidden;
}

.preview-surface.controls-hidden .preview-stage {
  grid-column: 1;
}

.frame-canvas {
  width: 100%;
  height: 100%;
  display: block;
  background: #050505;
}

.frame-output {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: pre;
  color: #fff;
  background: #050505;
  font: 14px/1.1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.is-hidden {
  display: none;
}

.overlay {
  border-right: 2px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
}

.controls-overlay {
  grid-column: 1;
  grid-row: 1;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto auto repeat(4, auto) 1fr auto;
  gap: 12px;
  align-content: start;
  padding: 16px;
  overflow: auto;
}

.overlay.is-hidden {
  display: none;
}

.overlay-hint {
  display: none;
}

.overlay-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 3;
  min-width: 124px;
  background: var(--paper);
  color: var(--accent);
}

.title-block {
  min-width: 0;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--ink);
}

h1,
p {
  margin: 0;
}

h1 {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1.15;
  text-transform: uppercase;
}

p,
.status {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

label {
  display: grid;
  gap: 5px;
  min-width: 0;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

label input[type="number"],
label select {
  width: 100%;
  padding: 0 8px;
}

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

.button-row button {
  background: var(--paper);
  color: var(--accent);
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  white-space: nowrap;
}

.status {
  align-self: end;
  min-width: 0;
  overflow: hidden;
  overflow-wrap: anywhere;
  text-overflow: ellipsis;
}

.status.is-error {
  color: var(--accent);
  text-decoration: underline;
}

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

.controls-hidden .preview-stage {
  grid-column: 1 / -1;
}

@media (max-width: 820px) {
  html,
  body,
  .preview-surface {
    min-height: 100dvh;
  }

  .preview-surface {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(0, 1fr) auto;
  }

  .preview-stage {
    grid-column: 1;
    grid-row: 1;
    min-height: 58dvh;
    padding: 64px 12px 12px;
  }

  .controls-overlay {
    grid-column: 1;
    min-height: 0;
    max-height: 42dvh;
    grid-row: 2;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: none;
    gap: 10px;
    border-top: 2px solid var(--ink);
    border-right: 0;
    padding: 12px;
    overflow: auto;
    -webkit-overflow-scrolling: touch;
  }

  .title-block,
  .button-row,
  label,
  .status {
    grid-column: 1 / -1;
  }

  .button-row {
    grid-template-columns: 1fr 1fr;
  }

  .overlay-toggle {
    top: max(10px, env(safe-area-inset-top));
    right: max(10px, env(safe-area-inset-right));
    width: min(156px, calc(100vw - 20px));
    min-height: 44px;
    min-width: 0;
  }

  .frame-output {
    font-size: 12px;
    line-height: 1.05;
  }

  button,
  input[type="number"],
  select {
    min-height: 44px;
  }
}