@page { size: A4; margin: 14mm; }
body { max-width: 1040px; margin: 0 auto; color: #25374a; font-family: "Avenir Next", "Noto Sans", "Noto Sans JP", sans-serif; font-size: 15px; line-height: 1.5; }
h1 { color: #d33b85; border-top: 8px solid #d33b85; padding-top: 8px; font-size: 1.65rem; }
h2 { color: #166c91; font-size: 1.25rem; }
h3 { color: #a65d00; font-size: 1.05rem; }
img { display: block; margin: 8px auto; max-width: 100%; max-height: 560px; object-fit: contain; border-radius: 12px; }
td img, th img { max-height: none; }
table { width: 100%; border-collapse: collapse; margin: 10px 0; page-break-inside: avoid; }
th { color: #fff; background: #2477a3; padding: 7px; border: 1px solid #a9c5d4; }
td { padding: 7px; border: 1px solid #a9c5d4; background: #f9fcfd; }
blockquote { border-left: 7px solid #f2b13d; background: #fff6da; margin: 10px 0; padding: 8px 12px; }
code { background: #eef4f6; color: #943c24; padding: 1px 4px; }
.audio-label { display: inline-block; margin-right: 8px; }
.audio-button-group { display: inline-flex; flex-wrap: wrap; gap: 6px; vertical-align: middle; }
.audio-button { display: inline-flex; align-items: center; gap: 6px; min-height: 36px; padding: 6px 12px; border: 2px solid #166c91; border-radius: 999px; color: #166c91; background: #fff; font: inherit; font-weight: 700; cursor: pointer; vertical-align: middle; }
.audio-button:hover, .audio-button:focus-visible { color: #fff; background: #166c91; outline: none; }
.audio-button.is-playing { color: #fff; background: #d33b85; border-color: #d33b85; }
.audio-button.has-error { color: #8a1c1c; border-color: #8a1c1c; }
.audio-button-icon { width: 1em; text-align: center; }
.cando { border: 2.5px solid #d33b85; border-radius: 14px; background: #fff0f7; padding: 4px 16px; margin: 12px 0; }
.cando p { margin: 10px 0; font-size: 1.12rem; font-weight: 600; color: #25374a; }
.cando strong { display: inline-block; min-width: 5.4em; margin-right: 4px; color: #fff; background: #d33b85; border-radius: 999px; padding: 1px 12px; font-size: 0.92rem; text-align: center; }
.bilan td { height: 34px; }
.bilan td:not(:first-child) { min-width: 64px; }
.bilan thead th:not(:first-child), .bilan td:not(:first-child) { text-align: center; }
.page-break { break-after: page; page-break-after: always; height: 1px; }
@media print { body { max-width: none; font-size: 10.5pt; } .page-break { break-after: page; } .audio-button { display: none; } }

/* Interactive HTML additions are maintained in textbook-ui.css. */