:root {
    --b2s-paper: #f7f2ea;
    --b2s-ink: #241c15;
    --b2s-muted: #5d5146;
    --b2s-border: #ded2c2;
    --b2s-accent: #8a5a32;
    --b2s-card: #fffaf3;
    --b2s-button: #2b2118;
    --b2s-button-alt: #f2ece3;
    --b2s-shadow: rgba(36, 28, 21, 0.06);
    --feed-width: 760px;
}

.video-feed-page {
    min-height: calc(100vh - 130px);
    padding: 20px 18px max(100px, calc(env(safe-area-inset-bottom) + 80px));
    background: var(--b2s-paper);
}

.video-feed-shell {
    max-width: var(--feed-width);
    margin: 0 auto;
}

.video-feed-tabs {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 auto 18px;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: none;
}

.video-feed-tabs::-webkit-scrollbar {
    display: none;
}

.video-feed-tab {
    padding: 10px 14px;
    border: 1px solid var(--b2s-border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.4);
    color: var(--b2s-muted);
    font: inherit;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
}

.video-feed-tab.is-active {
    background: var(--b2s-button);
    border-color: var(--b2s-button);
    color: #fff;
}

/* Floating feed-wide sound toggle (persistent FAB) */
.video-feed-sound-toggle {
    position: fixed;
    right: max(24px, calc(env(safe-area-inset-right) + 20px));
    bottom: max(24px, calc(env(safe-area-inset-bottom) + 20px));
    z-index: 900;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 11px 18px;
    border-radius: 999px;
    border: 1px solid #4a3b2c;
    background: #2b2118;
    color: #fffaf3;
    font: inherit;
    font-size: 0.88rem;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    user-select: none;
    box-shadow: 0 4px 18px rgba(36, 28, 21, 0.28), 0 1px 3px rgba(36, 28, 21, 0.16);
    transition: background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease, transform 0.1s ease;
}

.video-feed-sound-toggle:hover {
    background: #3a2e22;
    border-color: #634f3c;
    box-shadow: 0 6px 22px rgba(36, 28, 21, 0.32), 0 2px 4px rgba(36, 28, 21, 0.18);
}

.video-feed-sound-toggle:focus-visible {
    outline: 2px solid var(--b2s-accent);
    outline-offset: 3px;
}

.video-feed-sound-toggle:active {
    transform: scale(0.97);
}

.video-feed-sound-toggle.is-on {
    background: #1b140e;
    border-color: var(--b2s-accent);
    color: #fff;
    box-shadow: 0 4px 20px rgba(36, 28, 21, 0.36), 0 0 0 1px var(--b2s-accent);
}

.video-feed-sound-toggle__icon {
    display: inline-block;
    font-size: 1rem;
    line-height: 1;
}

.video-feed-sound-toggle__label {
    letter-spacing: 0.01em;
    white-space: nowrap;
}

/* Shown only when the browser actually blocks autoplay (e.g. iOS gesture requirement) */
.video-feed-start-toggle {
    position: fixed;
    left: 50%;
    top: max(18px, env(safe-area-inset-top));
    transform: translateX(-50%);
    z-index: 950;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 11px 20px;
    border-radius: 999px;
    border: 1px solid var(--b2s-accent);
    background: #2b2118;
    color: #fffaf3;
    font: inherit;
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    user-select: none;
    box-shadow: 0 4px 18px rgba(36, 28, 21, 0.28), 0 1px 3px rgba(36, 28, 21, 0.16);
}

.video-feed-start-toggle[hidden] {
    display: none;
}

.video-feed-start-toggle:active {
    transform: translateX(-50%) scale(0.97);
}

.video-feed-start-toggle__icon {
    display: inline-block;
    font-size: 0.9rem;
    line-height: 1;
}

.video-feed-start-toggle__label {
    letter-spacing: 0.01em;
    white-space: nowrap;
}

.video-feed {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.video-feed-item {
    /* background: var(--b2s-card); */
    /* border: 1px solid var(--b2s-border); */
    border-radius: 20px;
    /* box-shadow: 0 12px 28px var(--b2s-shadow); */
    overflow: hidden;
}

.video-feed-item__video-shell {
    position: relative;
    background: #000;
    border-bottom: 1px solid var(--b2s-border);
}

.video-feed-item__player {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #0f0f0f;
    overflow: hidden;
}

.video-feed-item__player iframe,
.video-feed-item__player > iframe {
    display: block;
    width: 100%;
    height: 100%;
    border: 0;
    background: #000;
}

.video-feed-item__poster,
.video-feed-item__poster-fallback {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-feed-item__poster-fallback {
    display: grid;
    place-items: center;
    color: #fff;
    background: linear-gradient(135deg, #2b2118, #615447);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.video-feed-item__content {
    padding: 18px 18px 16px;
}

.video-feed-item__title {
    margin: 0 0 8px;
    font-size: clamp(1.4rem, 2vw, 2rem);
    line-height: 1.18;
    color: var(--b2s-ink);
}

.video-feed-item__meta,
.video-feed-item__year {
    margin: 0;
    color: var(--b2s-muted);
    font-size: 0.96rem;
    line-height: 1.5;
}

.video-feed-item__meta {
    margin-bottom: 4px;
}

.video-feed-item__book-title {
    font-style: italic;
    font-weight: 700;
    color: var(--b2s-ink);
}

.video-feed-item__author-link {
    color: var(--b2s-accent);
    font-weight: 700;
    text-decoration: none;
}

.video-feed-item__author-link:hover,
.video-feed-item__author-link:focus-visible {
    text-decoration: underline;
}

.video-feed-item__description-wrap {
    margin-top: 14px;
}

.video-feed-item__description {
    margin: 0;
    color: var(--b2s-muted);
    line-height: 1.65;
    white-space: normal;
}

.video-feed-item__description--collapsed {
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-feed-item__more {
    appearance: none;
    margin-top: 8px;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--b2s-accent);
    font: inherit;
    font-size: 0.84rem;
    font-weight: 700;
    cursor: pointer;
}

.video-feed-item__more:focus-visible {
    outline: 2px solid var(--b2s-accent);
    outline-offset: 2px;
    border-radius: 4px;
}

.video-feed-item__actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid #e6d9c8;
}

.video-feed-item__action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 32px;

    .video-feed-item__save {
        text-align: center;
    }
    padding: 7px 12px;
    border: 1px solid #cdbda8;
    border-radius: 6px;
    background: #fff;
    color: var(--b2s-button);
    font: inherit;
    font-size: 0.82rem;
    font-weight: 700;
    text-decoration: none;
}

.video-feed-item__action:hover,
.video-feed-item__action:focus-visible {
    background: var(--b2s-button-alt);
    text-decoration: none;
}

.video-feed-item__save {
    padding: 7px 12px;
    font-size: 0.82rem;
}

.video-feed__sentinel {
    height: 1px;
}

.video-feed__status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 18px 0 6px;
    color: var(--b2s-muted);
    font-size: 0.86rem;
    font-weight: 600;
    text-align: center;
}

.video-feed__status[hidden] {
    display: none;
}

.video-feed__status-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--b2s-border);
    border-top-color: var(--b2s-accent);
    border-radius: 50%;
    animation: video-feed-status-spin .7s linear infinite;
}

.video-feed__status--error .video-feed__status-label {
    color: var(--b2s-ink);
}

.video-feed__status-retry {
    padding: 6px 14px;
    border: 1px solid #cdbda8;
    border-radius: 6px;
    background: #fff;
    color: var(--b2s-button);
    font: inherit;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
}

.video-feed__status-retry:hover,
.video-feed__status-retry:focus-visible {
    background: var(--b2s-button-alt);
}

@keyframes video-feed-status-spin {
    to {
        transform: rotate(360deg);
    }
}

@media (prefers-reduced-motion: reduce) {
    .video-feed__status-spinner {
        animation: none;
    }
}

@media (max-width: 640px) {
    .video-feed-page {
        padding-left: 12px;
        padding-right: 12px;
        padding-bottom: max(96px, calc(env(safe-area-inset-bottom) + 76px));
    }

    .video-feed-sound-toggle {
        right: max(16px, calc(env(safe-area-inset-right) + 12px));
        bottom: max(16px, calc(env(safe-area-inset-bottom) + 12px));
        min-height: 44px;
        padding: 10px 15px;
        font-size: 0.84rem;
        gap: 6px;
    }

    .video-feed-item__content {
        padding: 16px 14px 15px;
    }

    .video-feed-item__actions {
        gap: 8px;
    }

    .video-feed-item__action,
    .video-feed-item__save {
        flex: 1 1 calc(50% - 8px);
        justify-content: center;
        text-align: center;
    }
}

@media (max-width: 360px) {
    .video-feed-sound-toggle {
        right: max(10px, calc(env(safe-area-inset-right) + 8px));
        bottom: max(12px, calc(env(safe-area-inset-bottom) + 8px));
        padding: 10px 12px;
        font-size: 0.8rem;
    }
}