:root {
  font-family:
    -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  color: #111;
  background: #f7f7f4;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
.wrap {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: 28px 16px 56px;
}
header {
  margin: 12px 0 24px;
}
.eyebrow {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: #6d6d68;
}
h1 {
  font-size: 32px;
  margin: 8px 0 10px;
  letter-spacing: -0.03em;
}
h2 {
  font-size: 17px;
  margin: 0 0 16px;
}
p {
  line-height: 1.65;
  color: #444;
}
.card {
  background: #fff;
  border: 1px solid #deded8;
  border-radius: 16px;
  padding: 18px;
  margin: 14px 0;
}
.patternCard {
  background: #111;
  border-radius: 16px;
  padding: 14px;
  margin: 14px 0;
  text-align: center;
  overflow: hidden;
}
canvas {
  display: block;
  width: min(100%, 384px);
  height: auto;
  image-rendering: auto;
  margin: auto;
  background: #fff;
  border-radius: 8px;
}
.caption {
  color: #aaa;
  font-size: 11px;
  margin-top: 10px;
}
label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  margin: 12px 0 7px;
}
textarea,
input {
  width: 100%;
  border: 1px solid #cfcfc8;
  border-radius: 10px;
  padding: 12px;
  font: inherit;
  background: #fff;
  color: #111;
}
textarea {
  resize: vertical;
}
.row {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}
button {
  border: 1px solid #bcbcb5;
  background: #fff;
  border-radius: 10px;
  padding: 11px 16px;
  font-weight: 650;
  cursor: pointer;
}
button.primary {
  background: #111;
  color: #fff;
  border-color: #111;
}
button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.status {
  margin-top: 12px;
  font:
    12px ui-monospace,
    SFMono-Regular,
    Menlo,
    monospace;
  color: #666;
  white-space: pre-wrap;
}
.small {
  font-size: 13px;
  color: #666;
}
pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 12px;
  line-height: 1.55;
  background: #f5f5f2;
  padding: 12px;
  border-radius: 10px;
}
summary {
  cursor: pointer;
  font-weight: 650;
}
@media (max-width: 520px) {
  h1 {
    font-size: 28px;
  }
  .row {
    flex-direction: column;
  }
  button {
    width: 100%;
  }
}
#sheets canvas {
  display: block;
  width: min(100%, 384px);
  height: auto;
  margin: 12px 0;
}
#sheets > div {
  margin: 24px 0;
}
button {
  min-height: 44px;
}
input[type="file"] {
  max-width: 100%;
}
a {
  color: inherit;
}
textarea,
input {
  box-sizing: border-box;
}
summary {
  cursor: pointer;
}
#sheetImage {
  display: block;
  width: min(100%, 384px);
  height: auto;
  margin: 12px 0;
}
select {
  font: inherit;
  padding: 10px;
  max-width: 100%;
}
#preview[hidden] {
  display: none;
}
#cancel {
  position: sticky;
  bottom: 12px;
  border: 1px solid #777;
  background: #fff;
  z-index: 2;
}
button[hidden] {
  display: none;
}
button:disabled {
  cursor: default;
  opacity: 0.5;
}
input[type="file"] {
  font-size: 14px;
  width: 100%;
}
#motionCanvas {
  display: block;
  width: min(100%, 512px);
  height: auto;
  margin: 14px auto 0;
  background: #000;
  border-radius: 10px;
}
#preview h3 { margin: 18px 0 6px; font-size: 14px; }

#generate, #decode { margin-top: 16px; }


.actionGrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.actionGrid > button {
  width: 100%;
  margin: 0;
}
@media (max-width: 680px) {
  .actionGrid {
    grid-template-columns: 1fr;
  }
}


#saveResult {
  margin-top: 18px;
}