:root {
    --dorkk-lms-bg: #f6f7f9;
    --dorkk-lms-surface: #ffffff;
    --dorkk-lms-surface-soft: #fbfbfc;
    --dorkk-lms-text: #111827;
    --dorkk-lms-muted: #6b7280;
    --dorkk-lms-border: #e5e7eb;
    --dorkk-lms-accent: #aecd00;
    --dorkk-lms-accent-strong: #8bab00;
    --dorkk-lms-shadow: 0 18px 45px rgba(17,24,39,.14);
}

@media (prefers-color-scheme: dark) {
    :root {
        --dorkk-lms-bg: #0b1020;
        --dorkk-lms-surface: #121827;
        --dorkk-lms-surface-soft: #171f32;
        --dorkk-lms-text: #f8fafc;
        --dorkk-lms-muted: #a7b0c0;
        --dorkk-lms-border: #263247;
        --dorkk-lms-accent: #c8ea1a;
        --dorkk-lms-accent-strong: #d9ff22;
        --dorkk-lms-shadow: 0 18px 45px rgba(0,0,0,.38);
    }
}

.dorkk-lms,
.dorkk-lms * { box-sizing: border-box; }

.dorkk-lms {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 370px;
    gap: 20px;
    align-items: start;
    width: 100%;
    margin: 24px 0;
    color: var(--dorkk-lms-text);
    font-family: inherit;
}

.dorkk-lms-main,
.dorkk-lms-sidebar { min-width: 0; }

.dorkk-lms-player-card {
    background: var(--dorkk-lms-surface);
    border: 1px solid var(--dorkk-lms-border);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--dorkk-lms-shadow);
}

.dorkk-lms-player-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #050816;
    overflow: hidden;
}

.dorkk-lms-video {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    background: #050816;
}

.dorkk-lms-play-overlay {
    position: absolute;
    inset: 0;
    margin: auto;
    width: 86px;
    height: 86px;
    border-radius: 999px;
    border: 4px solid rgba(255,255,255,.9);
    background: color-mix(in srgb, var(--dorkk-lms-accent) 88%, transparent);
    box-shadow: 0 10px 30px rgba(0,0,0,.26);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform .2s ease, opacity .2s ease;
}

.dorkk-lms-play-overlay span {
    width: 0;
    height: 0;
    border-top: 16px solid transparent;
    border-bottom: 16px solid transparent;
    border-left: 24px solid #fff;
    margin-left: 7px;
}

.dorkk-lms-play-overlay:hover,
.dorkk-lms-play-overlay:focus-visible { transform: scale(1.05); outline: none; }
.dorkk-lms-player-wrap.is-playing .dorkk-lms-play-overlay { opacity: 0; pointer-events: none; }

.dorkk-lms-current {
    padding: 22px;
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: flex-start;
}

.dorkk-lms-current h2 {
    margin: 0;
    font-size: clamp(22px, 2.4vw, 34px);
    line-height: 1.15;
    font-weight: 800;
    color: var(--dorkk-lms-text);
    text-transform: uppercase;
}

.dorkk-lms-current-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
    color: var(--dorkk-lms-muted);
    font-size: 14px;
}

.dorkk-lms-current-meta span:not(:empty) {
    padding: 4px 9px;
    border: 1px solid var(--dorkk-lms-border);
    border-radius: 999px;
    background: var(--dorkk-lms-surface-soft);
}

.dorkk-lms-controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.dorkk-lms-control {
    appearance: none;
    border: 1px solid var(--dorkk-lms-border);
    border-radius: 999px;
    background: var(--dorkk-lms-surface-soft);
    color: var(--dorkk-lms-text);
    padding: 9px 14px;
    cursor: pointer;
    font-weight: 700;
}

.dorkk-lms-control:hover,
.dorkk-lms-control:focus-visible {
    border-color: var(--dorkk-lms-accent);
    outline: none;
}

.dorkk-lms-sidebar {
    background: var(--dorkk-lms-surface);
    border: 1px solid var(--dorkk-lms-border);
    border-radius: 18px;
    box-shadow: var(--dorkk-lms-shadow);
    overflow: hidden auto;
    max-height: 78vh;
}

.dorkk-lms-sidebar-header {
    padding: 16px 18px;
    border-bottom: 1px solid var(--dorkk-lms-border);
    position: sticky;
    top: 0;
    z-index: 2;
    background: var(--dorkk-lms-surface);
}

.dorkk-lms-sidebar-header h3 {
    margin: 0;
    font-size: 20px;
    line-height: 1.2;
    font-weight: 800;
    color: var(--dorkk-lms-text);
    text-transform: uppercase;
}

.dorkk-lms-sidebar-header p {
    margin: 4px 0 14px;
    color: var(--dorkk-lms-muted);
    font-size: 14px;
}

.dorkk-lms-search {
    width: 100%;
    border: 1px solid var(--dorkk-lms-border) !important;
    border-radius: 12px !important;
    background: var(--dorkk-lms-surface-soft) !important;
    color: var(--dorkk-lms-text) !important;
    padding: 11px 13px !important;
    font-size: 15px !important;
}

.dorkk-lms-search:focus {
    outline: 2px solid color-mix(in srgb, var(--dorkk-lms-accent) 45%, transparent);
    border-color: var(--dorkk-lms-accent) !important;
}

.dorkk-lms-module { border-bottom: 1px solid var(--dorkk-lms-border); }

.dorkk-lms-module-toggle {
    width: 100%;
    appearance: none;
    border: 0;
    background: var(--dorkk-lms-surface);
    cursor: pointer;
    padding: 15px 18px;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
    text-align: left;
    color: var(--dorkk-lms-text);
}

.dorkk-lms-module-toggle:hover { background: var(--dorkk-lms-surface-soft); }
.dorkk-lms-module-toggle strong { display:block; font-size: 16px; line-height: 1.25; font-weight: 800; text-transform: uppercase; }
.dorkk-lms-module-toggle small { display:block; margin-top:4px; color: var(--dorkk-lms-muted); font-size: 12px; }
.dorkk-lms-module-toggle b { width: 12px; height: 12px; border-right: 3px solid var(--dorkk-lms-muted); border-bottom: 3px solid var(--dorkk-lms-muted); transform: rotate(45deg); transition: transform .2s ease; flex: 0 0 auto; }
.dorkk-lms-module.is-open .dorkk-lms-module-toggle b { transform: rotate(225deg); }

.dorkk-lms-lessons { display:none; background: var(--dorkk-lms-surface-soft); }
.dorkk-lms-module.is-open .dorkk-lms-lessons { display:block; }

.dorkk-lms-lesson,
.dorkk-lms-search-result {
    width: 100%;
    appearance: none;
    border: 0;
    border-top: 1px solid var(--dorkk-lms-border);
    background: transparent;
    color: var(--dorkk-lms-text);
    padding: 12px 16px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
    text-align: left;
    cursor: pointer;
}

.dorkk-lms-lesson:hover,
.dorkk-lms-search-result:hover { background: color-mix(in srgb, var(--dorkk-lms-accent) 10%, transparent); }

.dorkk-lms-lesson.is-active,
.dorkk-lms-search-result.is-active {
    background: color-mix(in srgb, var(--dorkk-lms-accent) 17%, transparent);
    box-shadow: inset 4px 0 0 var(--dorkk-lms-accent);
}

.dorkk-lms-lesson-number {
    width: 28px;
    height: 28px;
    border-radius: 999px;
    background: var(--dorkk-lms-surface);
    border: 1px solid var(--dorkk-lms-border);
    color: var(--dorkk-lms-muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 800;
    flex: 0 0 auto;
}

.dorkk-lms-lesson.is-active .dorkk-lms-lesson-number,
.dorkk-lms-search-result.is-active .dorkk-lms-lesson-number {
    background: var(--dorkk-lms-accent);
    color: #111827;
    border-color: var(--dorkk-lms-accent);
}

.dorkk-lms-lesson-text strong { display:block; font-size:14px; line-height:1.28; font-weight:750; }
.dorkk-lms-lesson-text small { display:block; margin-top:4px; color:var(--dorkk-lms-muted); font-size:12px; }
.dorkk-lms-no-results { padding:16px 18px; color:var(--dorkk-lms-muted); }
.dorkk-lms-search-summary { padding:12px 18px; color:var(--dorkk-lms-muted); font-size:13px; font-weight:800; text-transform:uppercase; letter-spacing:.04em; }
.dorkk-library-video-error,
.dorkk-lms-notice { border-radius:12px; padding:14px 16px; background:var(--dorkk-lms-surface-soft); color:var(--dorkk-lms-text); border:1px solid var(--dorkk-lms-border); }
.dorkk-lms-error { border-color:#ef4444; }

.dorkk-lms-admin-card { max-width: 780px; background:#fff; border:1px solid #dcdcde; border-radius:10px; padding:18px 20px; margin:16px 0; }

@media (max-width: 960px) {
    .dorkk-lms { grid-template-columns: 1fr; }
    .dorkk-lms-sidebar { max-height: none; order: 2; }
    .dorkk-lms-current { flex-direction: column; }
    .dorkk-lms-controls { justify-content: flex-start; }
}

@media (max-width: 560px) {
    .dorkk-lms { gap: 14px; margin: 16px 0; }
    .dorkk-lms-player-card,
    .dorkk-lms-sidebar { border-radius: 14px; }
    .dorkk-lms-current { padding: 16px; }
    .dorkk-lms-play-overlay { width: 68px; height: 68px; }
}

/* Privacy-aware media loading and improved control states. */
.dorkk-lms-service-notice {
    margin: 12px 0 0;
    max-width: 680px;
    color: var(--dorkk-lms-muted);
    font-size: 12px;
    line-height: 1.5;
}

.dorkk-lms-control:disabled {
    cursor: not-allowed;
    opacity: .48;
    transform: none;
}

.dorkk-lms-player-wrap.is-loading::after {
    content: '';
    position: absolute;
    left: 50%;
    top: calc(50% + 62px);
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 3px solid rgba(255,255,255,.35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: dorkk-lms-spin .8s linear infinite;
    pointer-events: none;
}

.dorkk-lms-player-wrap .dorkk-library-video-error {
    position: absolute;
    z-index: 3;
    left: 18px;
    right: 18px;
    bottom: 18px;
    background: rgba(17,24,39,.92);
    border-color: rgba(255,255,255,.22);
    color: #fff;
    text-align: center;
}

@keyframes dorkk-lms-spin {
    to { transform: rotate(360deg); }
}