@charset "UTF-8";
/* =====================================================================
   TIMBO ROBOT / 説明追加版
   既存の写真・メイン画面・配色を保ち、説明部分だけを拡張します。
   01 製品概要    02 詳しい説明の開閉    03 学び    04 園での活動例
   05 製品補足    06 画像取得失敗表示    07 レスポンシブ・印刷
   ===================================================================== */

/* 01 / Timboとは ---------------------------------------------------- */
.timbo-overview {
    display: grid;
    grid-template-columns: 1.08fr 0.92fr;
    gap: 64px;
    align-items: start;
    margin-bottom: 60px;
}
.overview-copy .eyebrow { color: var(--orange-text); }
.overview-copy h3 { margin-top: 14px; font-size: 31px; line-height: 1.55; }
.overview-copy > p:not(.eyebrow) {
    margin-top: 20px;
    color: var(--muted);
    font-size: 18px;
    line-height: 1.95;
}
.overview-copy strong { color: var(--ink); font-weight: 700; }
.overview-features {
    padding: 30px 32px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--paper);
}
.overview-features > article { display: flex; align-items: start; gap: 18px; }
.overview-features > article + article { margin-top: 22px; padding-top: 22px; border-top: 1px solid var(--line); }
.overview-features > article > span {
    font-family: var(--font-latin);
    flex: 0 0 24px;
    white-space: nowrap;
    font-weight: 700;
    font-size: 14px;
    color: var(--orange-text);
    line-height: 2.2;
}
.overview-features > article > div { min-width: 0; }
.overview-features h4 { font-size: 19px; line-height: 1.65; }
.overview-features article p { font-size: 16px; color: var(--muted); margin-top: 8px; line-height: 1.9; }
.overview-note { font-size: 15px; color: var(--muted); margin-top: 24px; line-height: 1.9; }

/* 02 / 詳細説明は、必要なときだけ開く ------------------------------- */
.explanation-details {
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--white);
    margin-top: 32px;
    overflow: clip;
}
.explanation-details > summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    padding: 24px 28px;
    list-style: none;
    cursor: pointer;
}
.explanation-details > summary::-webkit-details-marker { display: none; }
.explanation-details > summary::marker { content: ""; }
.explanation-details > summary > span:first-child { display: flex; flex-direction: column; gap: 6px; }
.explanation-details > summary small { font-size: 14px; color: var(--orange-text); font-weight: 700; }
.explanation-details > summary strong { font-size: 21px; line-height: 1.6; }
.explanation-details > summary:hover { background: var(--paper); }
.explanation-details > summary:focus-visible { outline-offset: -5px; }
.explanation-toggle { position: relative; display: block; width: 44px; height: 44px; flex: 0 0 44px; border-radius: 50%; background: var(--ink); color: var(--white); }
.explanation-toggle::before,
.explanation-toggle::after { content: ""; position: absolute; top: 21px; left: 14px; height: 2px; width: 16px; background: currentColor; }
.explanation-toggle::after { transform: rotate(90deg); }
.explanation-details[open] .explanation-toggle::after { transform: rotate(0); }
.explanation-content { padding: 30px; border-top: 1px solid var(--line); }
.mechanism-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; }
.mechanism-grid .eyebrow { color: var(--orange-text); margin-bottom: 10px; }
.explanation-content h4 { font-size: 20px; line-height: 1.65; }
.explanation-content article p:not(.eyebrow) { font-size: 17px; line-height: 1.95; color: var(--muted); margin-top: 12px; }
.explanation-note { font-size: 16px; line-height: 1.9; color: var(--muted); margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); }

/* 03 / 学びの意図 --------------------------------------------------- */
.learning-context { max-width: 400px; margin-top: 40px; }
.learning-context .eyebrow { font-family: var(--font); letter-spacing: 0; font-size: 19px; font-weight: 700; }
.learning-context p + p { margin-top: 14px; font-size: 17px; color: #4f5945; line-height: 1.95; }
.learning-more { margin-top: 36px; }
.learning-more .explanation-details { margin-top: 0; background: #fafcf5; }
.learning-classroom-link { margin-top: 24px; }

/* 04 / 園での活動例 ------------------------------------------------- */
.classroom-examples { background: var(--paper); }
.classroom-examples .section-head { margin-bottom: 30px; }
.classroom-intro { max-width: 920px; color: var(--muted); font-size: 16px; line-height: 1.95; margin-bottom: 30px; }
.activity-examples-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.activity-example {
    padding: 30px 28px 24px;
    background: var(--white);
    border: 1px solid var(--line);
    border-top: 3px solid var(--orange);
    border-radius: 0 0 20px 20px;
    display: flex;
    flex-direction: column;
}
.activity-kicker { display: flex; gap: 10px; align-items: center; color: var(--orange-text); font-size: 14px; font-weight: 700; }
.activity-kicker > span { font-family: var(--font-latin); }
.activity-example h3 { font-size: 27px; line-height: 1.55; margin-top: 20px; margin-bottom: 20px; }
.activity-example > p:not(.activity-kicker):not(.activity-focus) { color: var(--muted); font-size: 17px; line-height: 1.95; }
.activity-example > p:not(.activity-kicker):not(.activity-focus) { margin-bottom: 26px; }
.activity-question { margin-top: auto; padding: 18px 0 0; border-top: 1px solid var(--line); }
.activity-question span { display: block; color: var(--muted); font-size: 14px; margin-bottom: 7px; }
.activity-question strong { font-size: 17px; line-height: 1.8; }
.activity-focus { margin-top: 0; padding-top: 15px; font-size: 14px; line-height: 1.9; color: var(--muted); }
.classroom-perspectives { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; margin-top: 44px; }
.classroom-perspectives .eyebrow { color: var(--orange-text); font-size: 13px; }
.classroom-perspectives h3 { font-size: 23px; margin-top: 12px; }
.classroom-perspectives p:not(.eyebrow) { font-size: 17px; color: var(--muted); margin-top: 15px; line-height: 1.95; }
.preparation-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 30px; }
.classroom-next { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 30px; padding-top: 28px; border-top: 1px solid var(--line); }
.classroom-next p { font-size: 16px; color: var(--muted); }
.classroom-next .text-link { flex: 0 0 auto; }

/* 05 / 基本セットの補足 --------------------------------------------- */
.product-explanation { margin-top: 18px; color: var(--muted); font-size: 17px; line-height: 1.95; }

/* 06 / 未取得の写真を、別の部品で置き換えない ---------------------- */
.accessory-photo-frame { display: block; width: 144px; min-height: 108px; }
.accessory-photo-frame .accessory-photo { max-width: 100%; }
.accessory-photo-unavailable { display: none; }
.accessory-photo-frame.is-photo-unavailable {
    display: grid;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--paper);
    padding: 12px;
}
.is-photo-unavailable .accessory-photo-unavailable { display: block; font-size: 13px; color: var(--muted); text-align: center; line-height: 1.8; }

/* 07 / Responsive --------------------------------------------------- */
@media (max-width: 1199px) {
    .timbo-overview { gap: 36px; }
    .overview-features { padding: 26px; }
    .activity-example { padding-inline: 22px; }
    .activity-example h3 { font-size: 24px; }
    .activity-examples-grid { gap: 18px; }
}
@media (max-width: 849px) {
    .timbo-overview { grid-template-columns: 1fr; gap: 28px; margin-bottom: 40px; }
    .overview-copy h3 { font-size: 28px; }
    .learning-context { max-width: none; margin-top: 25px; }
    .learning-context p + p { max-width: 600px; }
    .activity-examples-grid { grid-template-columns: 1fr; }
    .activity-example { padding: 24px; }
    .activity-example h3 { font-size: 25px; margin-block: 16px; }
    .activity-example h3 br { display: none; }
    .activity-question { margin-top: 20px; }
    .preparation-grid { grid-template-columns: 1fr; gap: 22px; }
    .classroom-perspectives { gap: 28px; }
    .classroom-perspectives h3 { font-size: 22px; }
    .classroom-next { flex-direction: column; align-items: flex-start; }
    .accessory-photo-frame { width: 96px; min-height: 72px; }
    .accessory-photo-frame.is-photo-unavailable { border-radius: 14px; padding: 8px; }
    .is-photo-unavailable .accessory-photo-unavailable { font-size: 11px; }
}
@media (max-width: 639px) {
    .overview-copy > p:not(.eyebrow) { font-size: 17px; }
    .overview-features { padding: 22px; }
    .overview-features h4 { font-size: 18px; }
    .overview-features > article { gap: 12px; }
    .overview-features article p { font-size: 16px; }
    .explanation-details > summary { padding: 20px; gap: 14px; }
    .explanation-details > summary strong { font-size: 18px; }
    .explanation-details > summary small { font-size: 13px; }
    .explanation-content { padding: 22px 20px; }
    .mechanism-grid { grid-template-columns: 1fr; gap: 24px; }
    .explanation-content h4 { font-size: 19px; }
    .explanation-content article p:not(.eyebrow) { font-size: 16px; }
    .classroom-perspectives { grid-template-columns: 1fr; gap: 24px; }
    .classroom-perspectives > article + article { border-top: 1px solid var(--line); padding-top: 24px; }
    .activity-example { padding-inline: 22px; }
    .activity-example h3 br { display: inline; }
    .activity-example p:not(.activity-kicker):not(.activity-focus) { font-size: 16px; }
    .activity-question strong { font-size: 16px; }
    .learning-context .eyebrow { font-size: 18px; }
    .learning-context p + p { font-size: 16px; }
    .product-explanation { font-size: 16px; }
}
@media print {
    .explanation-details { break-inside: avoid; }
    .activity-example, .classroom-perspectives article { break-inside: avoid; }
    .explanation-toggle { display: none; }
}