:root {
    --fundo: #eef2f5;
    --card: #ffffff;
    --borda: #e1e6ec;
    --texto: #1f2733;
    --texto-suave: #6b7480;
    --marca: #1d3a8a;
    --marca-claro: #eef3ff;
    --dourado: #d4a72c;
    --erro: #c62828;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--fundo);
    color: var(--texto);
    font-family: "DM Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

/* Cabeçalho */
.topo {
    background: var(--card);
    border-bottom: 1px solid var(--borda);
    display: flex;
    justify-content: center;
    padding: 10px 16px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.logo { display: flex; flex-direction: column; align-items: center; line-height: 1; }
.logo-nome { color: var(--marca); font-size: 24px; font-weight: 700; }
.logo-ano {
    color: var(--dourado);
    font-size: 9px;
    letter-spacing: 6px;
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.logo-ano::before, .logo-ano::after { content: ""; width: 26px; height: 1px; background: var(--dourado); }

/* Área do chat */
.chat { max-width: 660px; margin: 0 auto; padding: 16px 12px 48px; }
.chat-mensagens { display: flex; flex-direction: column; gap: 12px; }

.msg { animation: entrar .25s ease-out; }
.msg[hidden] { display: none; }
.msg-usuario { display: flex; justify-content: flex-end; }

@keyframes entrar {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: none; }
}

.card {
    background: var(--card);
    border: 1px solid var(--borda);
    border-radius: 16px;
    padding: 18px;
}
.card-fim { text-align: center; margin-top: 24px; }

.progresso { margin: 0 0 4px; font-size: 13px; color: var(--texto-suave); }
.pergunta { margin: 0 0 14px; font-size: 19px; font-weight: 700; line-height: 1.35; }

/* Alternativas */
.alternativas { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }

.alternativa {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 10px 14px;
    background: var(--card);
    border: 1px solid var(--borda);
    border-radius: 12px;
    text-align: left;
    font: inherit;
    color: inherit;
    cursor: pointer;
    transition: border-color .15s, background .15s, opacity .15s;
}
.alternativa:hover:not(:disabled) { border-color: var(--marca); background: var(--marca-claro); }
.alternativa:focus-visible { outline: 2px solid var(--marca); outline-offset: 2px; }
.alternativa:disabled { cursor: default; opacity: .45; }
.alternativa.selecionada { opacity: 1; border-color: var(--marca); background: var(--marca-claro); box-shadow: inset 0 0 0 1px var(--marca); }

.avatar {
    width: 52px;
    height: 52px;
    flex-shrink: 0;
    border-radius: 8px;
    object-fit: cover;
    background: #dde3ea;
}
.avatar-inicial {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--marca);
    font-weight: 700;
    font-size: 20px;
}

.alt-textos { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.alt-nome { font-size: 17px; font-weight: 600; text-transform: uppercase; }
.alt-descricao { font-size: 14px; color: var(--texto-suave); text-transform: uppercase; }

/* Bolha com a escolha do participante */
.bolha {
    display: flex;
    align-items: center;
    gap: 8px;
    max-width: 80%;
    padding: 8px 14px;
    background: var(--marca);
    color: #fff;
    border-radius: 16px 16px 4px 16px;
    font-weight: 600;
}
.bolha .avatar { width: 28px; height: 28px; border-radius: 6px; font-size: 13px; }

/* Indicador "digitando" */
.digitando {
    align-self: flex-start;
    display: flex;
    gap: 4px;
    padding: 12px 16px;
    background: var(--card);
    border: 1px solid var(--borda);
    border-radius: 16px 16px 16px 4px;
}
.digitando span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--texto-suave);
    animation: pulsar 1s infinite ease-in-out;
}
.digitando span:nth-child(2) { animation-delay: .15s; }
.digitando span:nth-child(3) { animation-delay: .3s; }

@keyframes pulsar {
    0%, 80%, 100% { opacity: .3; transform: scale(.8); }
    40% { opacity: 1; transform: scale(1); }
}

/* Formulário */
.telefone-linha { display: flex; gap: 8px; }
.telefone-linha input {
    flex: 1;
    min-width: 0;
    padding: 12px 14px;
    font: inherit;
    font-size: 17px;
    border: 1px solid var(--borda);
    border-radius: 12px;
}
.telefone-linha input:focus { outline: 2px solid var(--marca); outline-offset: 1px; }
.telefone-linha input[readonly] { background: var(--fundo); }

.btn {
    display: inline-block;
    padding: 12px 20px;
    background: var(--marca);
    color: #fff;
    border: 0;
    border-radius: 12px;
    font: inherit;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}
.btn:hover { filter: brightness(1.1); }
.btn:disabled { opacity: .6; cursor: default; }
.btn[hidden] { display: none; }

.acoes { display: flex; align-items: center; gap: 16px; }
.acoes-codigo { margin-top: 12px; font-size: 14px; }
.acoes[hidden] { display: none; }
.link { color: var(--marca); font-weight: 600; }
.link-botao { padding: 0; border: 0; background: none; font: inherit; color: var(--marca); font-weight: 600; cursor: pointer; }
.link-botao:disabled { color: var(--texto-suave); cursor: default; }
.texto-apoio { margin: -6px 0 14px; color: var(--texto-suave); }
.telefone-linha input[disabled] { background: var(--fundo); }

.erro-campo { color: var(--erro); font-size: 14px; margin: 8px 0 0; }
.erro-campo[hidden] { display: none; }

@media (prefers-reduced-motion: reduce) {
    .msg, .digitando span { animation: none; }
}