.s5yt {
    --s5yt-accent: #2563eb;
    --s5yt-active-text: #ffffff;
    --s5yt-ink: #172033;
    --s5yt-muted: #657087;
    --s5yt-surface: #f5f7fb;
    --s5yt-border: #dfe5ef;
    container-name: s5yt;
    container-type: inline-size;
    display: block;
    width: 100%;
    max-width: 100%;
    color: var(--s5yt-ink);
    font-family: inherit;
}

.s5yt *,
.s5yt *::before,
.s5yt *::after {
    box-sizing: border-box;
}

.s5yt__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    width: 100%;
}

.s5yt__media,
.s5yt__chapters {
    min-width: 0;
}

.s5yt__frame {
    position: relative;
    overflow: hidden;
    width: 100%;
    aspect-ratio: 16 / 9;
    min-height: 200px;
    border-radius: 16px;
    background: #0d1424;
}

.s5yt__frame iframe {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    border: 0;
}

.s5yt__chapters {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--s5yt-border);
    border-radius: 16px;
    background: var(--s5yt-surface);
}

.s5yt__chapters-header {
    padding: 24px 24px 16px;
}

.s5yt__eyebrow {
    display: block;
    margin: 0 0 8px;
    color: var(--s5yt-accent);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    line-height: 1.4;
    text-transform: uppercase;
}

.s5yt__title {
    margin: 0;
    color: var(--s5yt-ink);
    font-family: inherit;
    font-size: 24px;
    font-size: clamp(20px, 3cqi, 28px);
    font-weight: 700;
    line-height: 1.25;
}

.s5yt__chapter-list {
    display: grid;
    flex: 1 1 auto;
    gap: 8px;
    min-height: 0;
    overflow-y: auto;
    margin: 0;
    padding: 0 16px 16px;
    list-style: none;
    overscroll-behavior: contain;
    scrollbar-color: color-mix(in srgb, var(--s5yt-accent) 40%, transparent) transparent;
    scrollbar-width: thin;
}

.s5yt__chapter-item {
    margin: 0;
    padding: 0;
}

.s5yt__chapter-button {
    display: grid;
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    width: 100%;
    min-height: 56px;
    margin: 0;
    padding: 8px 16px 8px 8px;
    border: 1px solid var(--s5yt-border);
    border-radius: 12px;
    background: #ffffff;
    color: var(--s5yt-ink);
    font: inherit;
    text-align: left;
    cursor: pointer;
    transition:
        border-color 160ms ease,
        background-color 160ms ease,
        color 160ms ease,
        transform 160ms ease;
}

.s5yt__chapter-button:hover {
    border-color: var(--s5yt-accent);
    background: color-mix(in srgb, var(--s5yt-accent) 7%, #ffffff);
}

.s5yt__chapter-button:focus-visible {
    outline: 3px solid var(--s5yt-accent);
    outline: 3px solid color-mix(in srgb, var(--s5yt-accent) 38%, transparent);
    outline-offset: 2px;
}

.s5yt__chapter-button:active {
    transform: translateY(1px);
}

.s5yt__chapter-button[aria-current="true"] {
    border-color: var(--s5yt-accent);
    background: var(--s5yt-accent);
    color: var(--s5yt-active-text);
}

.s5yt__chapter-index {
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border-radius: 9px;
    background: color-mix(in srgb, var(--s5yt-accent) 10%, #ffffff);
    color: var(--s5yt-accent);
    font-size: 12px;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    line-height: 1;
}

.s5yt__chapter-button[aria-current="true"] .s5yt__chapter-index {
    background: color-mix(in srgb, var(--s5yt-active-text) 18%, transparent);
    color: inherit;
}

.s5yt__chapter-copy {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    align-items: baseline;
    min-width: 0;
}

.s5yt__chapter-title {
    overflow: hidden;
    font-size: 15px;
    font-weight: 650;
    line-height: 1.45;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.s5yt__chapter-time {
    color: var(--s5yt-muted);
    font-size: 13px;
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    line-height: 1.4;
}

.s5yt__chapter-button[aria-current="true"] .s5yt__chapter-time {
    color: inherit;
}

.s5yt__status {
    position: absolute;
    overflow: hidden;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    border: 0;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.s5yt-config-error {
    margin: 16px 0;
    padding: 16px;
    border-left: 4px solid #b42318;
    background: #fff3f2;
    color: #7a271a;
}

@container s5yt (min-width: 720px) {
    .s5yt--50-50 .s5yt__inner {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    }

    .s5yt--60-40 .s5yt__inner {
        grid-template-columns: minmax(0, 3fr) minmax(280px, 2fr);
    }

    .s5yt--70-30 .s5yt__inner {
        grid-template-columns: minmax(0, 7fr) minmax(280px, 3fr);
    }

    .s5yt:not(.s5yt--stacked) .s5yt__chapters {
        align-self: start;
    }
}

@supports not (container-type: inline-size) {
    @media (min-width: 782px) {
        .s5yt--50-50 .s5yt__inner {
            grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        }

        .s5yt--60-40 .s5yt__inner {
            grid-template-columns: minmax(0, 3fr) minmax(280px, 2fr);
        }

        .s5yt--70-30 .s5yt__inner {
            grid-template-columns: minmax(0, 7fr) minmax(280px, 3fr);
        }
    }
}

@media (max-width: 480px) {
    .s5yt__inner {
        gap: 16px;
    }

    .s5yt__frame,
    .s5yt__chapters {
        border-radius: 12px;
    }

    .s5yt__chapters-header {
        padding: 20px 16px 12px;
    }

    .s5yt__chapter-list {
        padding: 0 12px 12px;
    }

    .s5yt__chapter-copy {
        grid-template-columns: minmax(0, 1fr);
        gap: 2px;
    }

    .s5yt__chapter-time {
        font-size: 12px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .s5yt__chapter-button {
        transition: none;
    }
}