.article-participation{box-sizing:border-box;max-width:820px;margin:32px auto;padding:28px;background:#fffef9;border:1px solid #bdd4c0;border-radius:16px;color:#1f2a24;font-size:16px;line-height:1.8;text-align:left}
.article-participation *{box-sizing:border-box}
.article-participation [hidden]{display:none!important}
.article-participation .participation-label{display:inline-block;margin:0 0 12px;padding:2px 10px;background:#e7f1e5;color:#285b3d;border-radius:5px;font-size:13px;font-weight:700}
.article-participation h2{margin:0 0 16px;padding:0;border:0;background:none;color:#1f5e3b;font-size:clamp(21px,3.4vw,29px);line-height:1.5;letter-spacing:.01em}
body[data-design] .article-participation h2{padding:0;border:0;color:#1f5e3b;font-family:"Shippori Mincho",serif}
.article-participation p{margin:12px 0}
.article-participation .participation-intro{line-height:1.9}
.article-participation .participation-facts{margin:20px 0}
.participation-facts>div{display:grid;grid-template-columns:96px minmax(0,1fr);gap:16px;padding:12px 0;border-bottom:1px solid #d6e4d3}
.participation-facts dt{font-weight:700;color:#285b3d}
.participation-facts dd{margin:0;overflow-wrap:anywhere}
.article-participation .participation-conditions{font-size:14px;color:#435449;line-height:1.8}
.article-participation .participation-note{padding:12px 14px;background:#eef5eb;border-radius:8px;font-size:14px}
.article-participation .participation-primary{display:flex;justify-content:center;align-items:center;gap:12px;min-height:54px;margin:18px 0 22px;padding:12px 18px;background:#1f5e3b;color:#fff;border-radius:10px;font-weight:700;text-decoration:none;line-height:1.5}
.article-participation .participation-primary:hover{background:#184b2f;text-decoration:underline}
.participation-actions>p{font-size:14px;color:#526256}
.participation-buttons{display:flex;flex-wrap:wrap;gap:10px}
.article-participation button{font:inherit;min-height:48px;max-width:100%;padding:10px 14px;background:#fff;color:#1f5e3b;border:1px solid #7caa87;border-radius:9px;cursor:pointer;line-height:1.5;overflow-wrap:anywhere}
.participation-buttons button{flex:1 1 160px;font-size:15px}
.article-participation button:hover{background:#eef5eb}
.article-participation :is(a,button,input,summary):focus-visible{outline:3px solid #9d6a18;outline-offset:3px}
.article-participation .participation-status{min-height:0;margin:10px 0;font-size:14px;color:#285b3d}
.article-participation .participation-status:empty{display:none}
.participation-details{margin:0;border-top:1px solid #d6e4d3;padding:0}
.participation-details summary{min-height:48px;display:list-item;padding:14px 6px;color:#285b3d;font-weight:700;cursor:pointer}
.participation-details[open]{padding-bottom:14px}
.participation-details ol{margin:8px 0 12px;padding-left:28px}
.participation-details li{padding:8px 0}
.participation-details li p{margin:6px 0;font-size:15px}
.participation-details>p{font-size:15px}
.participation-share{margin-top:16px;padding:14px;background:#eef5eb;border-radius:9px}
.participation-share label{display:block;font-size:14px}
.participation-share input{display:block;width:100%;padding:9px;margin:8px 0 12px;border:1px solid #7caa87;background:#fff;color:#1f2a24;font:inherit;font-size:16px}
.article-participation .participation-source{padding-top:14px;border-top:1px solid #d6e4d3;font-size:12px;color:#526256;overflow-wrap:anywhere}
.article-participation[data-event-phase=ended],.article-participation[data-event-phase=closed],.article-participation[data-event-phase=review]{background:#f7f8f5}
@media(max-width:520px){.article-participation{padding:20px 16px;margin:24px 0}.participation-facts>div{grid-template-columns:1fr;gap:3px;padding:10px 0}.participation-facts dt{font-size:13px}.participation-buttons{flex-direction:column}.participation-buttons button{flex:none;width:100%;text-align:left}.article-participation h2{font-size:22px}.article-participation .participation-primary{font-size:14px;padding-inline:12px}}
@media(prefers-reduced-motion:reduce){.article-participation{scroll-behavior:auto}}