/* Zefinha IA - Chat */
.app {
    display: flex;
    /* 100vh no mobile conta a barra de endereço do navegador como visível o
       tempo todo, cortando o composer/teclado atrás dela. 100dvh (viewport
       dinâmico) acompanha a barra some/aparece; navegadores sem suporte a
       dvh ignoram a segunda declaração e ficam só com o 100vh de fallback. */
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 270px;
    background: var(--bg-2);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.new-chat {
    margin: 14px;
    padding: 11px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-align: left;
    font-weight: 600;
    transition: background .15s;
}
.new-chat:hover { background: var(--bg-3); }

.search-box { padding: 0 14px 8px; }
.search-box input {
    width: 100%;
    background: var(--bg-3);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 10px;
    color: var(--text);
    outline: none;
}
.search-box input:focus { border-color: var(--accent); }

.chat-list { flex: 1; overflow-y: auto; padding: 4px 8px; }
.chat-list-label { font-size: 12px; color: var(--text-dim); padding: 8px 8px 4px; }
.chat-empty { color: var(--text-dim); font-size: 13px; padding: 12px 8px; }

.chat-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 9px 10px;
    border-radius: var(--radius);
    color: var(--text-dim);
    margin-bottom: 2px;
}
.chat-item:hover { background: var(--bg-3); color: var(--text); }
.chat-item.active { background: var(--bg-3); color: var(--text); }
.chat-title { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-del { opacity: 0; font-size: 13px; }
.chat-item:hover .chat-del { opacity: .7; }
.chat-del:hover { opacity: 1; }

/* Backdrop atrás do menu lateral no mobile — só existe/é clicável quando o
   sidebar está aberto (ver .sidebar.open ~ .sidebar-backdrop abaixo). */
.sidebar-backdrop { display: none; }

.sidebar-footer { border-top: 1px solid var(--border); padding: 10px 14px; display: flex; flex-direction: column; gap: 6px; }
.sidebar-footer a { color: var(--text-dim); }
.sidebar-footer a:hover { color: var(--text); }

/* Main */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }

.topbar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 10px 18px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}
.menu-toggle { display: none; font-size: 20px; }
.topbar-brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { width: 32px; height: 32px; }
.brand-txt { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-weight: 800; font-size: 15px; }
.brand-by { font-size: 10.5px; color: var(--text-dim); letter-spacing: .3px; }

/* Seletor de modelo (estilo GPT): botao com o nome atual + menu suspenso */
.level-picker { display: flex; align-items: center; gap: 8px; }
.visually-hidden {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.model-picker { position: relative; }
.model-picker-btn {
    display: flex; align-items: center; gap: 7px;
    background: var(--bg-3); border: 1px solid var(--border); color: var(--text);
    border-radius: 9px; padding: 7px 12px; font: inherit; font-size: 13.5px; font-weight: 600;
    cursor: pointer;
}
.model-picker-btn:hover { border-color: var(--accent); }
.model-picker-btn:disabled { opacity: .5; cursor: not-allowed; }
.model-picker-caret {
    width: 7px; height: 7px;
    border-right: 1.5px solid var(--text-dim);
    border-bottom: 1.5px solid var(--text-dim);
    transform: rotate(45deg);
    margin-top: -3px;
}
.model-picker-btn[aria-expanded="true"] .model-picker-caret { transform: rotate(-135deg); margin-top: 3px; }
.model-picker-menu {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    min-width: 240px;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 6px;
    box-shadow: 0 14px 32px rgba(0,0,0,.28);
    z-index: 30;
}
.model-picker-opt {
    display: flex; align-items: center; justify-content: space-between; gap: 10px;
    width: 100%;
    padding: 9px 10px;
    border-radius: 8px;
    text-align: left;
    color: var(--text);
}
.model-picker-opt:hover { background: var(--bg-3); }
.model-picker-opt-text { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.model-picker-opt-name { font-size: 13.5px; font-weight: 600; }
.model-picker-opt-model { font-size: 11.5px; color: var(--text-dim); }
.model-picker-opt-check { opacity: 0; color: var(--accent); font-size: 13px; flex-shrink: 0; }
.model-picker-opt.active .model-picker-opt-check { opacity: 1; }
.compare-btn {
    background: var(--bg-3); border: 1px solid var(--border); color: var(--text-dim);
    border-radius: 9px; padding: 7px 11px; font-size: 12.5px;
}
.compare-btn:hover { color: var(--text); }
.compare-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.topbar-status { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-dim); }
.dot { width: 9px; height: 9px; border-radius: 50%; background: #6b7280; }
.dot.online { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.dot.offline { background: var(--danger); }
.topbar-user { margin-left: auto; font-size: 13px; color: var(--text-dim); display: flex; gap: 8px; align-items: center; }
.user-avatar { width: 22px; height: 22px; flex-shrink: 0; border-radius: 50%; object-fit: cover; border: 1px solid var(--border); }
.role-tag { background: var(--accent); color: #fff; font-size: 10px; padding: 2px 6px; border-radius: 6px; font-weight: 700; }
.logout { color: var(--danger); }

/* Barra de comparação */
.compare-bar {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 18px; background: var(--bg-2);
    border-bottom: 1px solid var(--border); font-size: 13px; color: var(--text-dim);
}
.compare-bar select { background: var(--bg-3); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 6px 10px; }
.compare-bar .vs { color: var(--accent); font-weight: 700; }
.compare-bar #compareClose { margin-left: auto; background: var(--bg-3); border: 1px solid var(--border); border-radius: 8px; padding: 5px 9px; color: var(--text-dim); }

/* Colunas de comparação */
.compare-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; min-width: 0; flex: 1; }
.cmp-col { border: 1px solid var(--border); border-radius: 10px; overflow: hidden; background: rgba(255,255,255,.015); }
.cmp-head { background: var(--bg-3); padding: 7px 12px; font-size: 12px; color: var(--accent); font-weight: 600; border-bottom: 1px solid var(--border); }
.cmp-col .msg-body { padding: 12px 14px; }
@media (max-width: 720px) { .compare-cols { grid-template-columns: 1fr; } }

/* Messages — bolhas de conversa, cor distinta por remetente */
.messages {
    flex: 1;
    overflow-y: auto;
    padding: 28px 20px;
    background: linear-gradient(180deg, rgba(255,255,255,.012), transparent 220px);
}
.welcome { text-align: center; margin-top: 12vh; color: var(--text-dim); }
.welcome-logo { width: 72px; height: 72px; }
.welcome h2 { color: var(--text); margin: 14px 0 4px; }

.msg {
    display: flex;
    max-width: 920px;
    margin: 0 auto 14px;
    padding: 0;
}
.msg-avatar { display: none !important; }
.msg.user { justify-content: flex-end; }
.msg.assistant { justify-content: flex-start; background: transparent; }
.msg-inner {
    max-width: min(760px, 82%);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 11px 13px 8px;
    box-shadow: 0 10px 28px rgba(0,0,0,.14);
}
.msg.user .msg-inner {
    background: #123f37;
    border-color: rgba(20,201,154,.35);
    color: #eefcf8;
    border-bottom-right-radius: 6px;
}
.msg.assistant .msg-inner {
    background: #171b23;
    border-color: #28303d;
    color: var(--text);
    border-bottom-left-radius: 6px;
}
.msg-meta {
    font-size: 11px;
    color: var(--text-dim);
    margin: 0 0 6px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
}
.msg.user .msg-meta { color: rgba(238,252,248,.72); text-align: right; }
.msg-body {
    min-width: 0;
    overflow-wrap: anywhere;
    line-height: 1.58;
}
.msg.user .msg-body { white-space: pre-wrap; }
.msg-body p:first-child { margin-top: 0; }
.msg-body p:last-child { margin-bottom: 0; }

.msg-actions {
    display: flex;
    gap: 7px;
    margin-top: 9px;
    opacity: .72;
}
.msg.user .msg-actions { justify-content: flex-end; }
.msg:hover .msg-actions { opacity: 1; }
.msg-actions button {
    border: 1px solid var(--border);
    background: rgba(255,255,255,.045);
    color: var(--text-dim);
    border-radius: 7px;
    padding: 4px 8px;
    font-size: 11px;
}
.msg-actions button:hover {
    color: var(--text);
    border-color: var(--accent);
}

.msg-body pre {
    background: #0b0f16;
    border: 1px solid #2a3342;
    border-radius: 10px;
    padding: 13px 14px;
    overflow-x: auto;
    position: relative;
}
.msg-body pre code { font-family: "Fira Code", Consolas, monospace; font-size: 13.5px; }
.msg-body code:not(pre code) {
    background: var(--bg-3);
    padding: 2px 5px;
    border-radius: 5px;
    font-size: 13.5px;
}
.code-bar {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    gap: 6px;
}
.copy-btn {
    background: #1e2530;
    border: 1px solid #344052;
    border-radius: 7px;
    padding: 4px 8px;
    font-size: 11px;
    color: var(--text-dim);
    cursor: pointer;
}
.copy-btn:hover { color: var(--text); }

/* Cartão de "mensagem pronta pra enviar" — separa visualmente o conteúdo que o
   usuário vai postar do texto de instruções ao redor. */
.msg-body pre.post-block {
    background: rgba(16,163,127,.07);
    border: 1px solid rgba(16,163,127,.45);
    padding-top: 34px;
    white-space: pre-wrap;
    word-break: break-word;
}
.msg-body pre.post-block code {
    font-family: inherit;
    font-size: 14.5px;
    line-height: 1.55;
    white-space: pre-wrap;
}
.post-label {
    position: absolute;
    top: 9px;
    left: 12px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .3px;
    color: var(--accent, #10a37f);
    text-transform: uppercase;
}

/* Indicador "pensando" */
.thinking {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--text-dim);
    font-size: 14px;
}
.thinking span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    display: inline-block;
    animation: think 1.2s infinite ease-in-out both;
}
.thinking span:nth-child(1) { animation-delay: -0.24s; }
.thinking span:nth-child(2) { animation-delay: -0.12s; }
.thinking span:nth-child(3) { margin-right: 6px; }
@keyframes think { 0%,80%,100% { transform: scale(.5); opacity: .4; } 40% { transform: scale(1); opacity: 1; } }

/* Revelação suave da resposta pronta */
.reveal { animation: fadeUp .28s ease; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* Composer */
.composer { border-top: 1px solid var(--border); padding: 14px 20px 10px; background: var(--bg); }
.composer form {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    max-width: 820px;
    margin: 0 auto;
    background: var(--bg-3);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 8px 10px;
}
.composer form:focus-within { border-color: var(--accent); }
.tool-btn { font-size: 13px; font-weight: 600; padding: 6px 8px; color: var(--text-dim); border-radius: 8px; }
.tool-btn:hover { color: var(--text); background: rgba(255,255,255,.04); }
.tool-btn.active { color: var(--accent); }
#attachBtn { font-size: 19px; font-weight: 400; line-height: 1; padding: 4px 9px; }
#prompt {
    flex: 1;
    background: none;
    border: none;
    resize: none;
    color: var(--text);
    outline: none;
    font: inherit;
    max-height: 200px;
    padding: 6px 4px;
}
.send-btn {
    background: var(--accent);
    color: #fff;
    /* Largura/altura fixas (34px) estouravam com o texto "Enviar" — o botão
       vira uma caixa apertada com a palavra vazando pra fora. Deixa o
       tamanho seguir o conteúdo, com padding, como os outros botões da
       barra (.tool-btn), mas com uma largura mínima pra não ficar
       espremido. */
    min-width: 68px;
    height: 34px;
    padding: 0 16px;
    border-radius: 9px;
    font-weight: 600;
    font-size: 13.5px;
    flex-shrink: 0;
}
.send-btn:disabled { background: var(--border); cursor: not-allowed; }
.composer-hint { text-align: center; font-size: 11px; color: var(--text-dim); margin-top: 6px; }
.composer-hint .plan-chip {
    display: inline-block;
    margin: 0 4px 0 6px;
    padding: 1px 8px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--accent);
    font-weight: 700;
}
.composer-hint #quota { color: var(--text-dim); }
#quota.quota-warn { color: var(--danger); font-weight: 700; }

/* Cota / upgrade */
.upgrade-link {
    display: inline-block;
    padding: 1px 9px;
    border: 1px solid var(--accent);
    border-radius: 999px;
    color: var(--accent);
    font-weight: 700;
}
.upgrade-link:hover { background: var(--accent); color: #fff; }
.composer-hint .upgrade-link { margin-left: 6px; }

/* Dropzone */
.dropzone {
    position: fixed; inset: 0;
    background: rgba(16,163,127,.15);
    border: 3px dashed var(--accent);
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    z-index: 50;
}
.dropzone.show { display: flex; }

/* Responsivo */
@media (max-width: 760px) {
    .sidebar {
        position: fixed;
        z-index: 40;
        height: 100%;
        width: min(82vw, 300px);
        transform: translateX(-100%);
        transition: transform .2s;
    }
    .sidebar.open { transform: translateX(0); }
    .sidebar.open ~ .sidebar-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        z-index: 35;
        background: rgba(0,0,0,.45);
    }
    .menu-toggle { display: block; }

    /* Botão de excluir depende de :hover, que não existe de forma confiável
       no toque — sem isso, dava pra apagar conversa só com mouse. */
    .chat-del { opacity: .55; }

    /* Barra superior cheia demais pra tela estreita: nome do app, seletor de
       modelo, status online/offline e usuário não cabem lado a lado — corta
       o que é dispensável e deixa o resto encolher em vez de estourar. */
    .topbar { padding: 8px 10px; gap: 8px; }
    .topbar-brand { gap: 6px; }
    .brand-logo { width: 26px; height: 26px; }
    .brand-by { display: none; }
    .topbar-status { display: none; }
    .level-picker { flex: 1; min-width: 0; }
    .model-picker { min-width: 0; }
    .model-picker-btn { padding: 6px 9px; max-width: 100%; }
    .model-picker-btn span#modelPickerLabel { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .model-picker-menu { min-width: 0; max-width: min(92vw, 320px); }
    .topbar-user { font-size: 12px; gap: 8px; }
    .compare-btn { display: none; } /* comparar 2 modelos lado a lado não cabe em tela estreita */

    .messages { padding: 18px 12px; }
    .msg-inner { max-width: 92%; }

    .composer { padding: 10px 10px calc(8px + env(safe-area-inset-bottom, 0px)); }
    /* iOS dá zoom automático em campos com font-size < 16px ao focar — a
       fonte-base do site é 15px, então sem isso todo toque no composer
       zoomava a tela inteira. */
    #prompt { font-size: 16px; }

    /* Alvos de toque maiores que os 32-34px originais (pensados pra mouse). */
    .send-btn { min-width: 76px; height: 40px; }
    .menu-toggle, .tool-btn { min-height: 36px; }
}