/* MegaCalcOnline video block – click-to-load YouTube (privacy-enhanced) */
.mco-video{max-width:720px;margin:24px 0;border:1px solid #e2e8f0;border-radius:12px;overflow:hidden;background:#fff}
.mco-video__frame{position:relative;aspect-ratio:16/9;background:#0f172a}
.mco-video__btn{all:unset;box-sizing:border-box;position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;cursor:pointer;color:#fff;text-align:center;padding:12px}
.mco-video__btn:focus-visible{outline:3px solid #facc15;outline-offset:-3px}
.mco-video__thumb{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.75}
.mco-video__play{position:relative;width:64px;height:64px;border-radius:50%;background:#dc2626;display:flex;align-items:center;justify-content:center}
.mco-video__play::after{content:"";border-style:solid;border-width:11px 0 11px 18px;border-color:transparent transparent transparent #fff;margin-left:4px}
.mco-video__label{position:relative;font:600 15px/1.3 system-ui,sans-serif}
.mco-video__frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.mco-video__body{padding:14px 16px;font:15px/1.5 system-ui,sans-serif;color:#1e293b}
.mco-video__title{margin:0 0 6px;font-size:17px}
.mco-video__summary{margin:0 0 8px}
.mco-video__note{margin:0;font-size:13px;color:#475569}
.mco-video__related a{font-weight:600}
@media (max-width:480px){.mco-video{border-radius:8px}.mco-video__play{width:52px;height:52px}}
@media (prefers-reduced-motion:no-preference){.mco-video__btn:hover .mco-video__play{transform:scale(1.06);transition:transform .15s}}