:root {
  color-scheme: light;
  --ink: #1d1f24;
  --muted: #686f7a;
  --line: #d9dee6;
  --panel: #ffffff;
  --page: #f4f6f8;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--page);
}

.app {
  width: min(1120px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 28px;
  display: grid;
  grid-template-columns: minmax(320px, 600px) minmax(280px, 360px);
  align-items: center;
  justify-content: center;
  gap: 28px;
}

.workspace {
  width: 100%;
  display: grid;
  place-items: center;
}

canvas {
  width: min(100%, 600px);
  aspect-ratio: 1;
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 16px 38px rgba(23, 31, 42, 0.12);
}

.controls {
  width: 100%;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 26px rgba(23, 31, 42, 0.08);
}

.field,
.field-row {
  display: grid;
  gap: 8px;
}

.field + .field-row,
.field-row + .field-row,
.field-row + .actions {
  margin-top: 18px;
}

label {
  font-size: 14px;
  font-weight: 650;
  color: var(--muted);
}

textarea {
  width: 100%;
  min-height: 142px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  font: inherit;
  line-height: 1.45;
  color: var(--ink);
  outline: none;
}

textarea:focus,
input[type="range"]:focus-visible,
input[type="color"]:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.24);
  outline-offset: 2px;
}

.field-row {
  grid-template-columns: 64px 1fr;
  align-items: center;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

input[type="color"] {
  width: 48px;
  height: 36px;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 10px;
}

button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: #f8fafc;
}

button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

button.primary:hover {
  background: var(--accent-dark);
}

@media (max-width: 840px) {
  .app {
    min-height: 0;
    padding: 18px;
    grid-template-columns: 1fr;
    align-items: start;
  }

  .controls {
    order: -1;
  }
}