.trading-course { margin-top: 28px; padding-top: 32px; border-top: 1px solid var(--fp-line); scroll-margin-top: 24px; }
.trading-course > header h2 { font: 800 26px/1.3 var(--fp-font); letter-spacing: -.6px; margin: 0 0 10px; }
.trading-course p { color: var(--fp-muted); font-size: 14px; line-height: 1.8; }
.trading-course-note { max-width: 78ch; margin: 16px 0 24px; }
.trading-course-module { border-bottom: 1px solid var(--fp-line); }
.trading-course-module > summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px 0; cursor: pointer; list-style: none; font-size: 17px; font-weight: 800; }
.trading-course-module > summary::-webkit-details-marker { display: none; }
.trading-course-module > summary::marker { content: ''; }
.trading-course-module > summary small { display: block; margin-top: 6px; font-size: 12px; font-weight: 500; color: var(--fp-muted); }
.trading-course-module[open] > summary > .fp-icon { transform: rotate(180deg); }
.trading-video-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; padding-bottom: 28px; }
.trading-video-card { min-width: 0; }
.trading-video-open { display: block; width: 100%; padding: 0; border: 1px solid var(--fp-line); border-radius: 12px; overflow: hidden; background: var(--fp-surface); color: var(--fp-ink); text-align: left; cursor: pointer; }
.trading-video-open:hover { border-color: var(--fp-muted); }
.trading-video-preview { position: relative; display: grid; place-items: center; aspect-ratio: 16 / 9; background: var(--fp-soft); overflow: hidden; }
.trading-video-preview img { display: block; width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
.trading-video-play { display: grid; place-items: center; width: 46px; height: 46px; padding-left: 3px; border-radius: 50%; background: var(--fp-yellow); color: var(--fp-ink); position: relative; font-size: 18px; }
.trading-video-duration { position: absolute; bottom: 8px; right: 8px; background: #242821; color: #fff; border-radius: 4px; padding: 3px 6px; font: 600 11px/1.4 var(--fp-font); }
.trading-video-name { display: block; min-height: 68px; padding: 16px; font: 700 14px/1.5 var(--fp-font); }
.trading-video-download { font-size: 11px; }
.trading-video-fallback video { display: block; width: 100%; aspect-ratio: 16 / 9; background: #000; }
.trading-video-fallback h3 { font: 700 14px/1.5 var(--fp-font); }
.trading-video-dialog { position: fixed; inset: 0; width: min(940px, calc(100vw - 32px)); max-height: calc(100dvh - 32px); padding: 0; margin: auto; border: 0; border-radius: 16px; background: var(--fp-surface); color: var(--fp-ink); overflow: auto; }
.trading-video-dialog::backdrop { background: rgba(0, 0, 0, .7); }
.trading-video-dialog-heading, .trading-video-dialog-footer { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 16px 20px; }
.trading-video-dialog-heading h2 { font: 800 18px/1.5 var(--fp-font); margin: 0; }
.trading-video-dialog button, .trading-video-dialog select { min-height: 44px; border: 1px solid var(--fp-outline); border-radius: 8px; background: var(--fp-soft); padding: 8px 12px; color: var(--fp-ink); font: 600 13px/1.5 var(--fp-font); cursor: pointer; }
.trading-video-dialog video { display: block; width: 100%; max-height: 65dvh; aspect-ratio: 16 / 9; background: #000; }
.trading-video-dialog-footer label { margin: 0; font: 600 12px/1.5 var(--fp-font); }
.trading-video-dialog [data-video-error] { padding: 0 20px 16px; margin: 0; }
.trading-video-showing { overflow: hidden; }
.trading-course summary:focus-visible { outline: 3px solid var(--fp-ink); outline-offset: 4px; }
.trading-course [hidden] { display: none !important; }
@media (max-width: 820px) { .trading-video-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; } }
@media (max-width: 479px) { .trading-video-grid { grid-template-columns: minmax(0, 1fr); } .trading-video-dialog-heading { padding: 12px; } .trading-video-name { min-height: 0; } }