/* =========================================================================
   S13: GEMINI AI ASSISTANT & RAG STYLES
   ========================================================================= */
.s13-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.s13-badges {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.45rem;
    flex-wrap: wrap;
}

.s13-header h1 {
    font-size: 1.45rem;
    margin: 0 0 0.35rem 0;
}

.s13-kpi-row {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.s13-kpi {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 0.65rem 1rem;
    min-width: 135px;
    display: flex;
    flex-direction: column;
}

.s13-kpi span {
    font-size: 0.76rem;
    color: #64748b;
}

.s13-kpi strong {
    font-size: 1.1rem;
    color: #0f172a;
}

.s13-workspace {
    display: grid;
    grid-template-columns: 330px 1fr;
    gap: 1.25rem;
    align-items: start;
}

@media (max-width: 960px) {
    .s13-workspace {
        grid-template-columns: 1fr;
    }
}

.s13-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.s13-panel h3 {
    font-size: 1rem;
    margin-top: 0;
    margin-bottom: 0.65rem;
}

.s13-new-session-form {
    display: flex;
    gap: 0.45rem;
    margin-bottom: 0.85rem;
}

.s13-session-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 250px;
    overflow-y: auto;
}

.s13-session-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.65rem 0.75rem;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    text-decoration: none;
    color: inherit;
    background: #fff;
    transition: all 0.15s ease;
}

.s13-session-item:hover {
    border-color: #93c5fd;
    background: #f8fafc;
}

.s13-session-item.active {
    border-color: #2563eb;
    background: #eff6ff;
}

.s13-session-item strong {
    display: block;
    font-size: 0.88rem;
    color: #0f172a;
}

.s13-session-item small {
    font-size: 0.75rem;
    color: #64748b;
}

.s13-rag-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.s13-rag-book {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.65rem;
    border-radius: 8px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
}

.s13-rag-book strong {
    display: block;
    font-size: 0.83rem;
}

.s13-rag-book small {
    font-size: 0.74rem;
    color: #64748b;
}

.s13-chat-card {
    display: flex;
    flex-direction: column;
    min-height: 580px;
}

.s13-chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid #e2e8f0;
    flex-wrap: wrap;
}

.s13-chat-header h2 {
    font-size: 1.1rem;
    margin: 0 0 0.2rem 0;
}

.s13-prompt-chips {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 0;
    flex-wrap: wrap;
}

.s13-chip {
    background: #f1f5f9;
    border: 1px solid #cbd5e1;
    border-radius: 999px;
    padding: 0.35rem 0.8rem;
    font-size: 0.8rem;
    color: #1e293b;
    cursor: pointer;
    transition: all 0.15s ease;
}

.s13-chip:hover {
    background: #e0f2fe;
    border-color: #38bdf8;
    color: #0369a1;
}

.s13-chat-viewport {
    flex: 1;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 1rem;
    overflow-y: auto;
    max-height: 410px;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.s13-msg-row {
    display: flex;
    gap: 0.65rem;
    align-items: flex-start;
}

.s13-msg-row.user {
    flex-direction: row-reverse;
}

.s13-msg-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.s13-msg-bubble {
    max-width: 78%;
    padding: 0.75rem 0.95rem;
    border-radius: 12px;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.s13-msg-row.user .s13-msg-bubble {
    background: #eff6ff;
    border-color: #bfdbfe;
}

.s13-msg-meta {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    font-size: 0.74rem;
    color: #64748b;
    margin-bottom: 0.35rem;
}

.s13-msg-text {
    white-space: pre-wrap;
    line-height: 1.5;
    font-size: 0.9rem;
    color: #0f172a;
}

.s13-chat-input-bar {
    display: flex;
    gap: 0.65rem;
    margin-top: 0.9rem;
}