.preview-notice{background:#e9e3f2;color:#594768;font-size:.875rem;text-align:center;padding:6px 16px;letter-spacing:.03em}
.whole-video{color:#fff3cf;font-size:.9375rem;text-decoration:none;border:1px solid #93809f;border-radius:10px;padding:10px 15px;display:flex;gap:14px;align-items:center}
.whole-video:hover{background:#ffffff12}.whole-video span{white-space:nowrap;font-size:.875rem}
.step-video{width:100%;max-width:none;margin:22px auto 30px;padding:0;background:transparent;border:0;border-radius:0}
.step-heading-actions{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:22px;margin-bottom:10px}
.step-heading-actions h2{margin:0}
.step-heading-actions .kit-download-actions{display:grid;grid-template-columns:repeat(2,minmax(180px,1fr));gap:10px}
.step-heading-actions .kit-download-button{min-width:190px;min-height:54px;padding:10px 14px;font-size:.9375rem}
.step-heading-actions .kit-download-button small{font-size:.8125rem}
.step-video-header{display:flex;align-items:center;justify-content:space-between;gap:9px;flex-wrap:wrap;margin-bottom:10px}
.step-video h3{font-size:.9375rem;line-height:1.6;margin:0;color:#392650;font-weight:700;display:flex;gap:8px;align-items:center}
.step-video h3::before{content:'▶';font-size:.75rem;color:#6240a4;background:transparent;width:18px;height:23px;display:inline-grid;place-items:center;flex:none}
.video-time{font-size:.8125rem;font-weight:700;line-height:1.7;color:#493076;background:transparent;padding:0;border-radius:0;white-space:nowrap;font-variant-numeric:tabular-nums}
.video-stage{position:relative;width:100%;aspect-ratio:16/9;border-radius:0;overflow:hidden;background:transparent;min-height:0}
.video-poster{display:block;width:100%;height:100%;padding:0;border:0;background:transparent;position:absolute;inset:0}
.video-poster img{width:100%;height:100%;display:block;object-fit:contain}
.video-poster .play-mark{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:62px;height:43px;border-radius:11px;background:#da2335;color:#fff;display:grid;place-items:center;font-size:23px;line-height:1;box-shadow:0 3px 15px #2a123344;padding-left:3px}
.video-poster:hover .play-mark{background:#bd1528}
.video-stage iframe{display:block;width:100%;height:100%;position:absolute;inset:0;border:0}
.video-caption{font-size:.875rem;color:#41364f;margin:10px 0 0;text-align:center;line-height:1.7}
.video-note{font-size:.9375rem;color:#41364f;margin:8px 0 0;line-height:1.75}
.video-external{display:block;text-align:center;font-size:.875rem;font-weight:700;margin-top:6px;color:#51318b}
.video-jumps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;margin:12px 0 0}
.video-jumps button{min-width:0;display:flex;align-items:center;gap:9px;padding:10px;border:1px solid #c9b5e0;border-radius:8px;background:#fff;color:#352343;font-size:.9375rem;font-weight:700;text-align:left;line-height:1.55}
.video-jumps button:hover{background:#ece3f7}.video-jumps button[aria-pressed=true]{background:#6240a4;color:#fff;border-color:#6240a4}
.video-jumps time{font-size:.8125rem;font-weight:700;white-space:nowrap;font-variant-numeric:tabular-nums}
.video-examples{max-width:540px;margin:28px auto 0;padding-top:22px;border-top:1px solid #e5deed}
.video-examples h3{font-size:1rem;color:#503766;margin-bottom:12px}
.video-examples ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.video-examples a{display:flex;justify-content:space-between;gap:12px;align-items:baseline;text-decoration:none;background:#f6f3fa;border:1px solid #e6deee;border-radius:8px;padding:10px 12px;font-size:.9375rem;color:#503766}
.video-examples a:hover{background:#eee6f7}.video-examples time{font-variant-numeric:tabular-nums;white-space:nowrap;font-size:.875rem}
.step-help-inline{margin-top:22px}.step-help-inline details:last-child{margin-bottom:0}
@media(max-width:950px){.video-jumps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:900px){.step-heading-actions{grid-template-columns:1fr}.step-heading-actions .kit-download-actions{grid-template-columns:repeat(2,minmax(0,1fr))}.step-heading-actions .kit-download-button{min-width:0}}
@media(max-width:700px){.step-video{padding:0;margin:20px auto 26px}.video-stage{min-height:0}.whole-video{font-size:.875rem;padding:8px 12px}.video-examples a{font-size:.875rem}.video-time{white-space:normal}.video-jumps{grid-template-columns:1fr}.video-jumps button{padding:10px;min-height:44px}}
@media(max-width:520px){.step-heading-actions .kit-download-actions{grid-template-columns:1fr}}
@media(max-width:380px){.step-video{padding:0}.panel{padding-left:16px;padding-right:16px}.video-stage{min-height:0}}
@media print{.step-video,.video-examples,.whole-video,.preview-notice{display:none!important}}
.step-video,.video-examples{font-weight:600}
body,button,a,summary{font-weight:600}
.brand,.steps b,.lesson-number b,.lesson-number span:last-child,.kit-download-button small{font-weight:600}