body { font-family: Arial, Helvetica, sans-serif; font-size: 18px; line-height: 1.4; max-width: 820px; margin: 0 auto; padding: 16px; color: #000; background: #fff; }
h1 { font-size: 26px; margin: 0 0 12px; }
h2 { font-size: 22px; margin: 28px 0 8px; border-top: 2px solid #000; padding-top: 16px; }
img.page { display: block; width: 100%; border: 1px solid #888; margin: 8px 0; }
label { display: block; margin: 14px 0 4px; font-weight: bold; }
input[type=text] { width: 100%; box-sizing: border-box; font-size: 20px; padding: 10px; border: 2px solid #000; }
canvas { display: block; width: 100%; height: 160px; border: 2px solid #000; background: #fff; touch-action: none; }
button, .btn { font-size: 20px; padding: 12px 20px; border: 2px solid #000; background: #fff; color: #000; cursor: pointer; text-decoration: none; display: inline-block; }
button.primary, .btn.primary { background: #000; color: #fff; }
.big { display: block; margin: 14px 0; padding: 22px; font-weight: bold; text-align: center; }
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: normal; margin: 20px 0; }
.check input { width: 26px; height: 26px; flex: none; margin: 0; }
#error { color: #b00000; font-weight: bold; min-height: 1.4em; margin: 10px 0; }
.small { font-size: 15px; }