.ai-levels-article{font-family:'Sarabun','Noto Sans Thai',sans-serif;background:#fff}
.ai-levels-article .article-prose{font-size:19px;line-height:1.95}
.ai-levels-article h1,.ai-levels-article h2,.ai-levels-article h3{font-family:inherit}
.ai-levels-article .article-page-intro{background:#f5f9ff}
.ai-levels-article .article-content{padding-top:34px}
.ai-levels-article .article-prose h2,.ai-levels-article .article-prose h3{color:#246b9f}
.ai-levels-article .article-prompt code,.ai-levels-article button{font-family:inherit}
.ai-levels-article .article-inline-image{aspect-ratio:16/9;background:#f5f9ff;overflow:hidden;border-radius:12px}
.ai-levels-article .article-inline-image img{display:block;width:100%;height:100%;object-fit:contain}
.ai-levels-article .article-inline-image figcaption:empty{display:none}
.level-summary{padding:24px;background:#f5f9ff;border:1px solid #d7e6f2;border-radius:12px;margin:28px 0}
.ai-levels-article .level-summary h3{margin:0 0 12px}
.ai-levels-article .level-summary ul,.ai-levels-article .level-summary p{margin-bottom:0}
.level-checklist{min-width:0;border:1px solid #c8deef;border-radius:12px;background:#f5f9ff;padding:18px 22px;margin:24px 0}
.level-checklist legend{padding:0 8px;font-size:16px;color:#246b9f;font-weight:700}
.level-checklist label{display:flex;align-items:flex-start;gap:13px;cursor:pointer;padding:12px 4px;border-bottom:1px solid #dce7ef;line-height:1.8}
.level-checklist input{flex:none;margin-top:8px;width:21px;height:21px;accent-color:#2b78b5;cursor:pointer}
.level-checklist label:has(input:checked){color:#155c8f;font-weight:600}
.level-checklist label:focus-within{outline:2px solid #ff751f;outline-offset:3px;border-radius:3px}
.level-checklist small{display:block;color:#52657a;font-size:13px;margin-top:14px}
.level-cards{display:grid;gap:18px;margin:28px 0}
.level-card{border:1px solid #d7e6f2;border-radius:14px;padding:26px;background:linear-gradient(135deg,#f5f9ff,#fff);box-shadow:0 8px 25px #18375506}
.level-card-label{font-size:13px!important;font-weight:700;letter-spacing:.06em;color:#a9470c}
.ai-levels-article .level-card h3{margin:0 0 10px;font-size:23px}
.ai-levels-article .level-card p{margin-bottom:14px}
.ai-levels-article .level-card .button{display:inline-flex;min-height:46px;background:#bf4b00;color:#fff!important;text-decoration:none;padding:10px 20px;border-radius:7px;align-items:center;justify-content:center;font-size:16px}
.ai-levels-article .level-card .button:hover{background:#a43d00}
.ai-levels-article .level-card .button:focus-visible{outline:3px solid #2b78b5;outline-offset:4px}
.ai-levels-article .article-toc{background:#f5f9ff;border:1px solid #d7e6f2;border-radius:12px;padding:24px}
.article-youtube-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:24px 0 32px}
.ai-levels-article .article-youtube-card{display:flex;flex-direction:column;border:1px solid #d7e6f2;border-radius:12px;overflow:hidden;background:#fff;text-decoration:none;box-shadow:0 6px 24px #18375508}
.article-youtube-card__image{position:relative;display:block;aspect-ratio:16/9;background:#edf5fa;overflow:hidden}
.article-youtube-card__image img{display:block;width:100%;height:100%;object-fit:cover}
.article-youtube-card__play{position:absolute;inset:0;display:grid;place-items:center;width:48px;height:48px;margin:auto;border-radius:50%;background:#bf4b00;color:#fff;box-shadow:0 3px 16px #071e3c55}
.article-youtube-card__play svg{width:30px;height:30px}
.article-youtube-card__body{display:flex;flex:1;flex-direction:column;gap:10px;padding:20px;font-size:16px;line-height:1.7;color:var(--ink)}
.article-youtube-card__label{font-size:12px;letter-spacing:.08em;color:#a9470c;font-weight:700}
.article-youtube-card__body strong{font-size:19px;line-height:1.65;color:var(--deep)}
.article-youtube-card__action{margin-top:auto;padding-top:6px;color:#246b9f;font-weight:700}
.ai-levels-article .article-youtube-card:hover{border-color:#2b78b5}
.article-youtube-card:focus-visible{outline:3px solid #ff751f;outline-offset:4px}
@media(max-width:600px){.article-youtube-links{grid-template-columns:1fr}.article-youtube-card__body{padding:18px}}
@media(max-width:540px){.ai-levels-article .article-prose{font-size:18px;line-height:1.9}.level-card,.level-summary{padding:20px}.level-checklist{padding:16px}.ai-levels-article .article-toc{padding:20px}.ai-levels-article .article-page-intro h1{font-size:31px;line-height:1.5}}