:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1b1f24;
  --muted: #5b6470;
  --border: #d8dce2;
  --accent: #2f6fde;
  --accent-text: #ffffff;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171b;
    --card: #1d2127;
    --text: #e6e9ed;
    --muted: #9aa3ae;
    --border: #343a42;
    --accent: #5b8ff0;
    --accent-text: #0d1117;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 920px; margin: 0 auto; padding: 32px 16px 48px; }
h1 { margin: 0 0 4px; font-size: 1.75rem; }
.privacy { margin: 0 0 24px; color: var(--muted); }
.layout { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
@media (max-width: 720px) { .layout { grid-template-columns: 1fr; } }
.controls, .output {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
label { display: block; margin: 12px 0 4px; font-weight: 600; font-size: 0.9rem; }
label.check { display: flex; gap: 8px; align-items: center; font-weight: 400; }
textarea, input[type="text"], select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}
textarea { resize: vertical; min-height: 96px; }
textarea:focus, input:focus, select:focus, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 4px; }
.tabs button {
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  color: var(--muted);
  padding: 8px 12px;
  margin-bottom: -1px;
}
.tabs button[aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); }
details { margin-top: 16px; }
summary { cursor: pointer; font-weight: 600; }
input[type="range"] { width: 100%; }
input[type="range"]:focus { outline: none; }
.colors { display: flex; gap: 16px; }
.colors label { display: flex; gap: 8px; align-items: center; }
input[type="color"] { width: 40px; height: 32px; border: 1px solid var(--border); border-radius: 6px; padding: 2px; background: var(--bg); }
.preview {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 1px dashed var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.preview canvas { width: 100%; height: auto; image-rendering: pixelated; display: block; }
.preview canvas[hidden] { display: none; }
#placeholder { color: var(--muted); padding: 16px; text-align: center; }
#status { min-height: 1.5em; margin: 8px 0; color: var(--muted); font-size: 0.9rem; }
.actions { display: flex; flex-wrap: nowrap; gap: 8px; }
.actions button { display: inline-flex; align-items: center; justify-content: center; gap: 6px; }
.icon { width: 1.1em; height: 1.1em; fill: currentColor; flex-shrink: 0; }
#copy .icon-check, #copy.copied .icon-copy { display: none; }
#copy.copied .icon-check { display: block; }
button {
  font: inherit;
  cursor: pointer;
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}
.actions button:nth-child(n+2) { background: transparent; color: var(--accent); }
button:disabled { opacity: 0.45; cursor: not-allowed; }