/* ============================================================
   Página Base de Conhecimento
   ============================================================ */

.bc-grade {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-4);
}

.bc-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-4);
    cursor: pointer;
    transition: box-shadow 0.15s, border-color 0.15s;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}
.bc-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.bc-card-modulo {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.bc-card-titulo {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    line-height: 1.3;
}

.bc-card-resumo {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.5;
    flex: 1;
}

.bc-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-1);
    margin-top: var(--spacing-1);
}

/* Modal de leitura */
.bc-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-4);
}

.bc-modal {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    width: 100%;
    max-width: 720px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.bc-modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-3);
    padding: var(--spacing-4) var(--spacing-5);
    border-bottom: 1px solid var(--color-border);
}

.bc-modal-titulo {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin: var(--spacing-1) 0 0;
}

.bc-modal-corpo {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-5);
}

.bc-conteudo {
    white-space: pre-wrap;
    font-family: inherit;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    line-height: 1.7;
    margin: 0;
}

.bc-modal-footer {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-5);
    border-top: 1px solid var(--color-border);
}

/* ============================================================
   Chat Assistente (botão flutuante)
   ============================================================ */

.chat-assistente {
    position: fixed;
    bottom: var(--spacing-5);
    right: var(--spacing-5);
    z-index: 1000;
}

.chat-btn-abrir {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.chat-btn-abrir:hover { background: var(--color-primary-dark, #1a5fb4); }

.chat-janela {
    position: fixed;
    bottom: 80px;
    right: var(--spacing-5);
    width: 360px;
    max-height: 520px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-cabecalho {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--color-primary);
    color: #fff;
    font-weight: var(--font-weight-semibold);
}
.chat-cabecalho .chat-fechar {
    margin-left: auto;
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
}

.chat-sugestoes {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-1);
    padding: var(--spacing-2) var(--spacing-3);
    border-bottom: 1px solid var(--color-border);
}
.chat-sugestao {
    font-size: var(--font-size-xs);
    padding: var(--spacing-1) var(--spacing-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    cursor: pointer;
    color: var(--color-text-primary);
    transition: background 0.15s;
}
.chat-sugestao:hover { background: var(--color-border); }

.chat-mensagens {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-3);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.chat-mensagem {
    max-width: 85%;
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}
.chat-mensagem--usuario {
    align-self: flex-end;
    background: var(--color-primary);
    color: #fff;
    border-bottom-right-radius: var(--radius-sm);
}
.chat-mensagem--assistente {
    align-self: flex-start;
    background: var(--color-border);
    color: var(--color-text-primary);
    border-bottom-left-radius: var(--radius-sm);
}

.chat-digitando {
    display: flex;
    gap: 4px;
    align-items: center;
    padding: 4px 0;
}
.chat-digitando span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--color-text-secondary);
    animation: digitando 1s infinite;
}
.chat-digitando span:nth-child(2) { animation-delay: 0.2s; }
.chat-digitando span:nth-child(3) { animation-delay: 0.4s; }

@keyframes digitando {
    0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
    30% { opacity: 1; transform: translateY(-4px); }
}

.chat-entrada {
    display: flex;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-3);
    border-top: 1px solid var(--color-border);
    align-items: flex-end;
}
.chat-input {
    flex: 1;
    resize: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-2);
    font-size: var(--font-size-sm);
    font-family: inherit;
    outline: none;
    background: var(--color-surface);
    color: var(--color-text-primary);
}
.chat-input:focus { border-color: var(--color-primary); }
.chat-enviar { align-self: flex-end; }