:root {
  color-scheme: light dark;
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #0f141b;
  --text: #e6edf3;
  --muted: #8b949e;
  --border: #30363d;
  --accent: #58a6ff;
  --danger: #ff7b72;
  --button: #238636;
  --button-hover: #2ea043;
  --input: #0d1117;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
  background: radial-gradient(circle at top left, #1f2a44, var(--bg) 45%);
  color: var(--text);
}

.layout {
  display: grid;
  grid-template-columns: minmax(340px, 560px) minmax(320px, 1fr);
  gap: 24px;
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: 24px;
}

.panel {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.25);
}

.controls,
.preview {
  padding: 22px;
}

.header-block h1,
.preview h2 {
  margin: 0;
  line-height: 1.1;
}

.header-block p,
.preview p,
.note {
  margin: 8px 0 0;
  color: var(--muted);
}

form {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

label {
  display: grid;
  gap: 7px;
  font-size: 0.9rem;
  color: var(--muted);
}

input,
select,
textarea,
button {
  font: inherit;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 11px;
  background: var(--input);
  color: var(--text);
  outline: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

input[type="color"] {
  min-height: 42px;
  padding: 4px;
}

textarea {
  resize: vertical;
  min-height: 120px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.row {
  display: grid;
  gap: 14px;
}

.row.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

details {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  background: var(--panel-2);
}

summary {
  cursor: pointer;
  color: var(--text);
}

.advanced-grid {
  margin-top: 12px;
}

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

button {
  border: 1px solid color-mix(in srgb, var(--button) 65%, white);
  border-radius: 10px;
  padding: 10px 12px;
  cursor: pointer;
  background: var(--button);
  color: white;
  font-weight: 650;
}

button:hover {
  background: var(--button-hover);
}

.preview {
  display: grid;
  align-content: start;
  gap: 18px;
}

.preview-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

#status {
  display: inline-flex;
  align-items: center;
  max-width: 50%;
  min-height: 32px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 10px;
  color: var(--muted);
  background: var(--panel-2);
  overflow-wrap: anywhere;
}

#status[data-error="true"] {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 45%, var(--border));
}

.canvas-shell {
  display: grid;
  place-items: center;
  min-height: 420px;
  border: 1px dashed var(--border);
  border-radius: 16px;
  padding: 24px;
  background:
    linear-gradient(45deg, rgba(255,255,255,0.035) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,0.035) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.035) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.035) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
}

canvas {
  display: block;
  max-width: 100%;
  max-height: 70vh;
  image-rendering: pixelated;
  background: #fff;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

#image-url {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.note {
  font-size: 0.9rem;
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .layout {
    padding: 12px;
  }

  .controls,
  .preview {
    padding: 16px;
  }

  .row.two,
  .row.three,
  .actions {
    grid-template-columns: 1fr;
  }

  .preview-header {
    display: grid;
  }

  #status {
    max-width: 100%;
  }

  .canvas-shell {
    min-height: 300px;
    padding: 12px;
  }
}