:root {
  --bg: #f3efe5;
  --panel: rgba(255, 252, 244, 0.86);
  --panel-border: rgba(66, 54, 38, 0.12);
  --text: #1c1712;
  --muted: #6a5d4e;
  --accent: #d66e31;
  --accent-strong: #a64815;
  --shadow: 0 18px 60px rgba(61, 39, 19, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", "Noto Sans JP", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(214, 110, 49, 0.26), transparent 26%),
    radial-gradient(circle at bottom right, rgba(162, 116, 71, 0.18), transparent 20%),
    linear-gradient(145deg, #f8f4ea 0%, #ede2d1 100%);
}

.app-shell {
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.description {
  margin: 0 0 14px;
  padding: 4px 2px 0;
  font-size: 0.98rem;
  line-height: 1.5;
  color: var(--muted);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.controls {
  padding: 22px;
}

.control-row {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}

.control-row + .control-row {
  margin-top: 16px;
}

.file-picker,
button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  font: inherit;
}

.file-picker {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  background: var(--text);
  color: #fffaf0;
  cursor: pointer;
  overflow: hidden;
}

.file-picker input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

button {
  min-height: 52px;
  padding: 0 22px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, opacity 160ms ease;
}

button:hover:enabled,
.file-picker:hover {
  transform: translateY(-1px);
}

button:hover:enabled {
  background: var(--accent-strong);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.text-field {
  display: grid;
  gap: 8px;
  min-width: min(100%, 380px);
  color: var(--muted);
}

.text-field span {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.text-field input {
  width: 100%;
  min-height: 50px;
  padding: 0 16px;
  border: 1px solid rgba(66, 54, 38, 0.18);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.85);
  color: var(--text);
  font: inherit;
}

.text-field input:focus {
  outline: 2px solid rgba(214, 110, 49, 0.35);
  outline-offset: 2px;
}

.checkbox input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.meta-grid > div {
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(66, 54, 38, 0.09);
}

.meta-label,
.meta-value {
  display: block;
}

.meta-label {
  margin-bottom: 6px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.meta-value {
  font-size: 0.95rem;
}

.canvas-panel {
  margin-top: 18px;
  padding: 18px;
}

.canvas-frame {
  position: relative;
  overflow: hidden;
  border-radius: 18px;
  background:
    linear-gradient(45deg, rgba(28, 23, 18, 0.08) 25%, transparent 25%, transparent 75%, rgba(28, 23, 18, 0.08) 75%),
    linear-gradient(45deg, rgba(28, 23, 18, 0.08) 25%, transparent 25%, transparent 75%, rgba(28, 23, 18, 0.08) 75%);
  background-position: 0 0, 12px 12px;
  background-size: 24px 24px;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  cursor: grab;
}

canvas.dragging {
  cursor: grabbing;
}

.hint {
  margin: 14px 4px 0;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 720px) {
  .app-shell {
    width: min(100vw - 20px, 1120px);
    padding-top: 20px;
  }

  .controls,
  .canvas-panel {
    padding: 16px;
  }

  .meta-grid {
    grid-template-columns: 1fr;
  }
}