.vbt-plus-summary {
    --vbt-summary-bg: #0a3558;
    --vbt-summary-bg-soft: #12406a;
    --vbt-summary-line: rgba(255, 255, 255, 0.12);
    --vbt-summary-muted: #9db4c9;
    --vbt-summary-accent: #2eb56f;
    --vbt-summary-accent-soft: rgba(46, 181, 111, 0.28);
    color: #fff;
    background: var(--vbt-summary-bg);
    border-radius: 16px;
    padding: 1.35rem 1.5rem 1.25rem;
}

.vbt-plus-summary__heading {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    margin-bottom: 1rem;
    color: #b7c9da;
    font-size: 0.95rem;
    font-weight: 600;
}

.vbt-plus-summary__heading svg {
    flex: none;
    color: #fff;
}

.vbt-plus-summary__body {
    font-size: 1rem;
    line-height: 1.65;
}

.vbt-plus-summary__body p {
    margin: 0 0 0.85em;
}

.vbt-plus-summary__body p:last-child {
    margin-bottom: 0;
}

.vbt-plus-summary__body a {
    color: #fff;
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.vbt-plus-summary__body code {
    padding: 0.12em 0.4em;
    border-radius: 4px;
    background: var(--vbt-summary-accent-soft);
    color: #fff;
    font-family: inherit;
    font-size: 0.95em;
    font-weight: 600;
}

.vbt-plus-summary__cite {
    display: inline-block;
    margin-left: 0.15em;
    padding: 0 0.28em;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.16);
    color: #fff;
    font-size: 0.7em;
    font-weight: 700;
    line-height: 1.4;
    vertical-align: super;
}

.vbt-plus-summary__skeleton {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    padding: 0.15rem 0 0.25rem;
}

.vbt-plus-summary__skeleton span {
    display: block;
    height: 0.75rem;
    border-radius: 999px;
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.08) 25%,
        rgba(255, 255, 255, 0.18) 50%,
        rgba(255, 255, 255, 0.08) 75%
    );
    background-size: 300% 100%;
    animation: vbt-plus-summary-shimmer 1.6s ease-in-out infinite;
}

.vbt-plus-summary__skeleton span:nth-child(2) {
    width: 88%;
}

.vbt-plus-summary__skeleton span:nth-child(3) {
    width: 64%;
}

@keyframes vbt-plus-summary-shimmer {
    from { background-position: 100% 0; }
    to { background-position: -200% 0; }
}

.vbt-plus-summary__rule {
    height: 1px;
    margin: 1.15rem 0 0.9rem;
    background: var(--vbt-summary-line);
}

.vbt-plus-summary__sources-toggle {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    width: 100%;
    padding: 0;
    border: 0;
    background: none;
    color: #d5e2ee;
    cursor: pointer;
    font: inherit;
    font-size: 0.92rem;
    font-weight: 600;
}

.vbt-plus-summary__sources-toggle svg {
    flex: none;
    transition: transform 0.2s ease;
}

.vbt-plus-summary--sources-closed .vbt-plus-summary__sources-toggle svg {
    transform: rotate(-90deg);
}

.vbt-plus-summary__count {
    display: inline-flex;
    min-width: 1.25rem;
    height: 1.25rem;
    align-items: center;
    justify-content: center;
    padding: 0 0.35rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
    font-size: 0.72rem;
    font-weight: 700;
}

.vbt-plus-summary__sources {
    display: grid;
    gap: 0.55rem;
    margin-top: 0.85rem;
}

.vbt-plus-summary--sources-closed .vbt-plus-summary__sources {
    display: none;
}

.vbt-plus-summary__source {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    padding: 0.8rem 0.9rem;
    border-radius: 12px;
    background: var(--vbt-summary-bg-soft);
    color: inherit;
    text-decoration: none;
}

.vbt-plus-summary__source:hover {
    background: #164776;
}

.vbt-plus-summary__index {
    display: inline-flex;
    flex: none;
    width: 1.5rem;
    height: 1.5rem;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    background: var(--vbt-summary-accent);
    color: #fff;
    font-size: 0.78rem;
    font-weight: 700;
}

.vbt-plus-summary__source-title {
    display: block;
    font-weight: 700;
    line-height: 1.35;
}

.vbt-plus-summary__source-meta {
    display: block;
    margin-top: 0.2rem;
    color: var(--vbt-summary-muted);
    font-size: 0.82rem;
}

.vbt-plus-summary-stack--chat .vbt-plus-summary:not(.vbt-plus-summary--followup) {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.vbt-plus-summary--followup {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.85rem 1.1rem;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
    padding-top: 1.15rem;
}

.vbt-plus-summary__footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.85rem 1.1rem;
    margin-top: 1.15rem;
}

.vbt-plus-summary__chat {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.15rem;
    border: 0;
    border-radius: 999px;
    background: var(--vbt-summary-accent);
    color: #fff;
    cursor: pointer;
    font: inherit;
    font-size: 0.92rem;
    font-weight: 700;
    text-decoration: none;
}

.vbt-plus-summary__chat:hover {
    filter: brightness(1.06);
}

.vbt-plus-summary__hint {
    color: var(--vbt-summary-muted);
    font-size: 0.86rem;
}