:root{--rdt-secondary:#1A202C;--rdt-shadow:0 8px 24px rgba(0,0,0,0.06)}.rdt-courses{--rdt-primary:#FB6D06;--rdt-primary-hover:#e85f00;--rdt-link:#3182CE;--rdt-text:#2D3748;--rdt-muted:rgba(26,32,44,.68);--rdt-surface:#FFFFFF;--rdt-bg:#F7FAFC;--rdt-border:#E1E2F3;--rdt-radius:20px;--rdt-btn-radius:15px;--rdt-shadow:0 8px 24px rgba(0,0,0,0.06)}.rdt-courses{max-width:1120px;margin:0 auto;padding:18px 16px;color:var(--rdt-text)}.rdt-courses__h1{font-weight:800;font-size:26px;line-height:1.25;margin:0 0 8px;color:var(--rdt-secondary)}.rdt-courses__h2{font-weight:900;font-size:18px;margin:0 0 8px;color:var(--rdt-secondary)}.rdt-courses__muted{color:var(--rdt-muted);font-size:13px}.rdt-courses__link{color:var(--rdt-link);text-decoration:none;font-weight:700}.rdt-courses__link:hover{text-decoration:underline}.rdt-courses__notice{border:1px solid var(--rdt-border);background:var(--rdt-surface);border-radius:var(--rdt-radius);padding:14px}.rdt-courses__card{background:var(--rdt-surface);border:1px solid var(--rdt-border);border-radius:var(--rdt-radius);box-shadow:var(--rdt-shadow)}.rdt-courses__btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 16px;border-radius:var(--rdt-btn-radius);background:var(--rdt-primary);color:#fff;border:1px solid var(--rdt-primary);text-decoration:none;font-weight:900;font-size:13px;line-height:1;transition:transform .08s ease,filter .12s ease}.rdt-courses__btn:hover{transform:translateY(-1px);background:var(--rdt-primary-hover);border-color:var(--rdt-primary-hover);filter:none}.rdt-courses__btn--ghost{background:#fff0;color:var(--rdt-primary)}.rdt-courses__btn--ghost:hover{background:color-mix(in srgb,var(--rdt-primary) 10%,transparent)}.rdt-courses .rdt-courses__btn,.rdt-courses a.rdt-courses__btn{color:#fff}.rdt-courses .rdt-courses__btn--ghost,.rdt-courses a.rdt-courses__btn--ghost{color:var(--rdt-primary)}.rdt-courses .rdt-courses__btn:disabled,.rdt-courses .rdt-courses__btn[disabled]{opacity:.55;cursor:not-allowed;transform:none;filter:none;background:var(--rdt-primary);border-color:var(--rdt-primary);color:#fff}.rdt-courses .rdt-courses__btn:hover{background:var(--rdt-primary-hover);border-color:var(--rdt-primary-hover);color:#fff;filter:none}.rdt-courses__header{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:12px}.rdt-courses__filters{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.rdt-courses__filters select{padding:10px 12px;border-radius:12px;border:1px solid var(--rdt-border);background:var(--rdt-surface);font-weight:700;font-size:13px}.rdt-courses__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}@media (max-width:980px){.rdt-courses__grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:640px){.rdt-courses__grid{grid-template-columns:1fr}}.rdt-courses__courseCard{overflow:hidden}.rdt-courses__courseThumb{aspect-ratio:16/9;background:color-mix(in srgb,var(--rdt-text) 4%,transparent);display:block}.rdt-courses__courseThumb img{width:100%;height:100%;object-fit:cover;display:block}.rdt-courses__courseBody{padding:12px 12px 14px}.rdt-courses__courseTitle{font-weight:900;margin:0 0 6px;color:var(--rdt-secondary);font-size:16px}.rdt-courses__badges{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}.rdt-courses__badge{font-size:12px;font-weight:900;padding:6px 10px;border-radius:var(--rdt-btn-radius);border:1px solid var(--rdt-border);background:color-mix(in srgb,var(--rdt-text) 3%,transparent);color:var(--rdt-secondary)}.rdt-courses__badge--free{border-color:color-mix(in srgb,var(--rdt-primary) 45%,transparent);background:color-mix(in srgb,var(--rdt-primary) 12%,white);color:var(--rdt-secondary)}.rdt-courses__hero{padding:16px;margin-bottom:14px}.rdt-courses__heroGrid{display:grid;grid-template-columns:1.2fr .8fr;gap:14px;align-items:start}@media (max-width:860px){.rdt-courses__heroGrid{grid-template-columns:1fr}}.rdt-courses__meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}.rdt-courses__metaItem{font-size:12px;font-weight:900;padding:6px 10px;border-radius:var(--rdt-btn-radius);border:1px solid var(--rdt-border);background:color-mix(in srgb,var(--rdt-text) 2%,transparent)}.rdt-courses__ctaBox{padding:14px;border:1px solid var(--rdt-border);border-radius:var(--rdt-radius);background:color-mix(in srgb,var(--rdt-text) 2%,transparent)}.rdt-courses__progressBar{height:10px;border-radius:999px;background:color-mix(in srgb,var(--rdt-text) 8%,transparent);overflow:hidden}.rdt-courses__progressBar>span{display:block;height:100%;background:var(--rdt-primary);width:0}.rdt-courses__syllabus{padding:16px}.rdt-courses__module{border:1px solid var(--rdt-border);border-radius:var(--rdt-radius);margin:10px 0;overflow:hidden;background:var(--rdt-surface)}.rdt-courses__moduleHead{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:12px 14px;cursor:pointer;background:color-mix(in srgb,var(--rdt-text) 2%,transparent)}.rdt-courses__moduleTitle{font-weight:900;color:var(--rdt-secondary)}.rdt-courses__moduleBody{padding:10px 14px;display:none}.rdt-courses__module.is-open .rdt-courses__moduleBody{display:block}.rdt-courses__lessonRow{display:flex;align-items:center;gap:10px;justify-content:space-between;padding:8px 0;border-bottom:1px solid color-mix(in srgb,var(--rdt-text) 6%,transparent)}.rdt-courses__lessonRow:last-child{border-bottom:none}.rdt-courses__lessonLeft{display:flex;gap:10px;align-items:center;min-width:0}.rdt-courses__lessonIcon{width:22px;height:22px;border-radius:6px;background:color-mix(in srgb,var(--rdt-text) 6%,transparent);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:900}.rdt-courses__lessonTitle{font-weight:800;color:var(--rdt-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.rdt-courses__lessonActions{display:flex;gap:8px;align-items:center}.rdt-courses__player{display:grid;grid-template-columns:1.45fr .55fr;gap:14px;align-items:start}@media (max-width:980px){.rdt-courses__player{grid-template-columns:1fr}}.rdt-courses__playerMain{padding:16px}.rdt-courses__playerSide{padding:12px;position:sticky;top:16px;max-height:calc(100vh - 32px);overflow:auto}@media (max-width:980px){.rdt-courses__playerSide{position:relative;top:auto;max-height:none}}.rdt-courses__video{border-radius:var(--rdt-radius);overflow:hidden;border:1px solid var(--rdt-border);background:color-mix(in srgb,var(--rdt-text) 3%,transparent)}.rdt-courses__videoInner{aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;position:relative}.rdt-courses__playBtn{padding:12px 16px;border-radius:var(--rdt-btn-radius);background:var(--rdt-primary);color:#fff;border:1px solid var(--rdt-primary);font-weight:900;cursor:pointer}.rdt-courses__tabs{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}.rdt-courses__tab{padding:10px 14px;border-radius:var(--rdt-btn-radius);border:1px solid var(--rdt-border);background:var(--rdt-surface);font-weight:900;font-size:13px;cursor:pointer}.rdt-courses__tab.is-active{border-color:var(--rdt-primary);color:var(--rdt-primary);background:color-mix(in srgb,var(--rdt-primary) 12%,white)}.rdt-courses__tabPanel{margin-top:12px;display:none}.rdt-courses__tabPanel.is-active{display:block}.rdt-courses__resList{margin:0;padding-left:18px}.rdt-courses__resList li{margin:6px 0}.rdt-courses__check{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:5px;border:1px solid color-mix(in srgb,var(--rdt-text) 22%,transparent)}.rdt-courses__check.is-on{border-color:var(--rdt-primary);background:color-mix(in srgb,var(--rdt-primary) 12%,transparent)}.rdt-courses__adminHint{font-size:12px;color:var(--rdt-muted)}.rdt-courseCard{background:var(--rdt-surface,#fff);border:1px solid var(--rdt-border);border-radius:var(--rdt-radius,18px);box-shadow:var(--rdt-shadow,0 10px 26px rgb(26 32 44 / .08));overflow:hidden;display:flex;flex-direction:column;min-height:100%}.rdt-courseCard__thumb{display:block;aspect-ratio:16/9;background:color-mix(in srgb,var(--rdt-text) 4%,transparent);overflow:hidden}.rdt-courseCard__thumb img{width:100%;height:100%;object-fit:cover;display:block;transform:translateZ(0)}.rdt-courseCard__thumbFallback{width:100%;height:100%;background:radial-gradient(circle at 30% 30%,color-mix(in srgb,var(--rdt-primary) 12%,transparent),transparent 55%),linear-gradient(135deg,color-mix(in srgb,var(--rdt-text) 5%,transparent),color-mix(in srgb,var(--rdt-text) 2%,transparent))}.rdt-courseCard__body{padding:14px 14px 16px;display:flex;flex-direction:column;flex:1}.rdt-courseCard__title{margin:0 0 8px;font-weight:900;font-size:16px;line-height:1.15;color:var(--rdt-secondary,#1A202C)}.rdt-courseCard__title a{color:inherit;text-decoration:none}.rdt-courseCard__title a:hover{text-decoration:underline}.rdt-courseCard__meta{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 10px}.rdt-badge,.rdt-chip{font-size:12px;font-weight:900;padding:6px 10px;border-radius:var(--rdt-btn-radius);border:1px solid var(--rdt-border);background:color-mix(in srgb,var(--rdt-text) 2%,transparent);color:var(--rdt-secondary,#1A202C);line-height:1;white-space:nowrap}.rdt-badge.is-free{border-color:color-mix(in srgb,var(--rdt-primary) 45%,transparent);background:color-mix(in srgb,var(--rdt-primary) 12%,white)}.rdt-courseCard__excerpt{margin:0 0 14px;color:var(--rdt-muted);font-size:14px;line-height:1.45}.rdt-courseCard__actions{margin-top:auto}.rdt-courseCard__actions .rdt-courses__btn{width:100%;justify-content:center;border-radius:14px;padding:12px 14px}@media (hover:hover){.rdt-courseCard{transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}.rdt-courseCard:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgb(26 32 44 / .12);border-color:color-mix(in srgb,var(--rdt-text) 14%,transparent)}}@media (max-width:640px){.rdt-courseCard__body{padding:12px 12px 14px}.rdt-courseCard__title{font-size:15px}.rdt-courseCard__excerpt{font-size:13.5px}}.rdt-courses__dashHeader{margin:0 0 12px}.rdt-courses__grid--dash{grid-template-columns:repeat(2,minmax(0,1fr))}@media (max-width:980px){.rdt-courses__grid--dash{grid-template-columns:1fr}}.rdt-courses__progressBar--dash{margin-top:10px}.rdt-courses__progressBar--dash>span{display:block;height:100%;background:var(--rdt-primary);width:0}.rdt-courses__grid--dash{grid-template-columns:1fr;gap:12px}.rdt-courseCard--dash{max-width:520px}.rdt-courseCard--dash .rdt-courseCard__thumb{aspect-ratio:21/9;background:rgb(26 32 44 / .04)}.rdt-courseCard--dash .rdt-courseCard__thumb img{width:100%;height:100%;object-fit:cover;image-rendering:auto}.rdt-courseCard--dash .rdt-courseCard__body{padding:12px 12px 14px}.rdt-courseCard--dash .rdt-courseCard__meta{margin:6px 0 8px;gap:8px}.rdt-courseCard--dash .rdt-courses__progressBar{height:8px;margin-top:10px;margin-bottom:12px}.rdt-courseCard--dash .rdt-courseCard__actions .rdt-courses__btn{padding:12px 14px;border-radius:14px}.rdt-courses--dash .rdt-courseCard--dash{margin:0}@media (min-width:900px){.rdt-courses--dash .rdt-courseCard--dash{margin-left:0}}