:root {
  --black: #000000;
  --white: #ffffff;
  --gray-245: #f5f5f5;
  --red: #ff0000;
  --title: 'Oswald', sans-serif;
  --text: 'Inter', sans-serif;
  --code: 'Consolas', 'Courier New', monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  color: var(--black);
  font-family: var(--text);
  background: var(--gray-245);
}

.page-shell {
  width: 100%;
  flex: 1;
  display: grid;
  grid-template-columns: 350px minmax(0, 1fr);
  gap: 20px;
  padding: 18px;
}

.control-panel {
  background: var(--white);
  border: 1px solid var(--black);
  border-radius: 0;
  padding: 18px 16px;
  display: grid;
  align-content: start;
  gap: 14px;
}

.control-panel h1 {
  margin: 0;
  font-family: var(--title);
  font-weight: 600;
  font-size: 2rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-align: center;
}

.subtitle {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.35;
  color: #666;
  text-align: center;
}

/* ─── Control groups (section + details) ─────────────────────────── */

.control-group {
  border: 1px solid var(--black);
  border-radius: 0;
  padding: 10px;
  display: grid;
  gap: 9px;
  background: var(--gray-245);
}

.control-group h2 {
  margin: 0;
  font-family: var(--title);
  font-weight: 400;
  font-size: 0.94rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: inline;
}

/* ─── Details/summary uitklapbare secties ─────────────────────────── */

details.control-group {
  padding: 0;
}

details.control-group > summary {
  padding: 10px;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

details.control-group > summary::-webkit-details-marker {
  display: none;
}

details.control-group > summary::after {
  content: '+';
  font-family: var(--code);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
  flex-shrink: 0;
}

details[open].control-group > summary::after {
  content: '\2212';
}

details.control-group > summary:hover {
  background: var(--black);
  color: var(--white);
}

details.control-group > :not(summary) {
  padding: 0 10px;
  margin-bottom: 9px;
}

details.control-group > label,
details.control-group > div {
  padding: 0 10px;
}

details.control-group > label:last-child,
details.control-group > div:last-child {
  margin-bottom: 10px;
}

/* ─── Grid sub-controls ─────────────────────────── */

#grid-controls {
  display: grid;
  gap: 9px;
}

/* ─── Form elements ─────────────────────────── */

label {
  display: grid;
  gap: 5px;
  font-size: 0.9rem;
}

label.inline {
  display: flex;
  align-items: center;
  gap: 8px;
}

label.disabled-control {
  opacity: 0.45;
}

label.disabled-control input,
label.disabled-control select,
button.disabled-control {
  cursor: not-allowed;
}

button.disabled-control,
button.disabled-control:hover {
  opacity: 0.45;
  background: var(--black);
  border-color: var(--black);
  color: var(--white);
}

.hidden {
  display: none !important;
}

select,
input[type="range"],
button {
  width: 100%;
}

select {
  appearance: none;
  font-family: var(--text);
  font-size: 0.9rem;
  color: var(--black);
  padding: 7px 10px;
  border-radius: 0;
  border: 1px solid var(--black);
  background: var(--white);
}

input[type="range"],
input[type="checkbox"] {
  accent-color: var(--black);
}

.value {
  font-family: var(--code);
  font-size: 0.84rem;
}

/* ─── Buttons ─────────────────────────── */

button {
  border: 1px solid var(--black);
  border-radius: 0;
  padding: 8px 10px;
  font-family: var(--title);
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--black);
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
}

button:hover {
  background: var(--white);
  color: var(--black);
}

button:active {
  background: var(--black);
  color: var(--white);
}

/* ─── Stage (canvas + editor) ─────────────────────────── */

.stage {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 0;
  height: calc(100vh - 80px);
}

.stage-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.badge {
  border: 1px solid var(--black);
  border-radius: 0;
  background: var(--white);
  padding: 6px 10px;
  font-family: var(--code);
  font-size: 0.78rem;
}

#canvas-wrap {
  border-radius: 0;
  overflow: hidden;
  border: 1px solid var(--black);
  min-height: 200px;
  background: var(--white);
}

#canvas-wrap canvas {
  width: 100%;
  height: 100%;
  display: block;
}

canvas {
  display: block;
}

/* ─── Live Code Editor ─────────────────────────── */

.editor-section {
  border: 1px solid var(--black);
  background: var(--white);
}

.editor-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  border-bottom: 1px solid var(--black);
  background: var(--gray-245);
}

.editor-bar h2 {
  margin: 0;
  font-family: var(--title);
  font-weight: 400;
  font-size: 0.94rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

.editor-actions button {
  width: auto;
  padding: 5px 14px;
  font-size: 0.78rem;
}

.code-output {
  width: 100%;
  min-height: 220px;
  border: none;
  border-radius: 0;
  padding: 10px;
  resize: vertical;
  background: var(--white);
  color: var(--black);
  font-family: var(--code);
  font-size: 0.8rem;
  line-height: 1.45;
}

.code-output:focus {
  outline: 2px solid var(--black);
  outline-offset: -2px;
}

.code-output.user-edited {
  border-top: 2px solid var(--red);
}

/* ─── Responsive ─────────────────────────── */

@media (max-width: 1024px) {
  .page-shell {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 12px;
  }

  .control-panel {
    order: 2;
  }

  .stage {
    order: 1;
  }

  #canvas-wrap {
    min-height: 360px;
  }
}