:root{
    --bg:#FBFAF8;
    --bg-sidebar:#F7F6F2;
    --bg-raised:#FFFFFF;
    --bg-input:#FFFFFF;
    --bg-hover:#EDEBE4;
    --bg-active:#E8E6DE;
    --bg-code:#FAF9F5;
    --bg-code-header:#F0EEE6;
    --ink:#1F1E1D;
    --ink-2:#3D3929;
    --ink-soft:#73716A;
    --ink-faint:#A8A69E;
    --accent:#D97757;
    --accent-dark:#C15F3C;
    --accent-soft:#F7E7DF;
    --border:#E9E7DF;
    --border-strong:#D9D7CD;
    --user-bubble:#F0EEE6;
    --overlay:rgba(30,29,26,.45);
    --danger:#B4442C;
    --shadow-menu:0 8px 30px rgba(30,29,26,.14);
    --font-ui:"Styrene B","Söhne","Helvetica Neue",Arial,sans-serif;
    --font-serif:"Anthropic Serif","Tiempos Text",Georgia,"Iowan Old Style",serif;
    --font-mono:"Berkeley Mono","SF Mono",Consolas,monospace;
  }
  :root[data-theme="dark"]{
    --bg:#262624;
    --bg-sidebar:#1F1E1C;
    --bg-raised:#30302E;
    --bg-input:#30302E;
    --bg-hover:#393937;
    --bg-active:#403F3C;
    --bg-code:#1F1E1C;
    --bg-code-header:#30302E;
    --ink:#EEECE5;
    --ink-2:#EEECE5;
    --ink-soft:#A29E92;
    --ink-faint:#6E6C63;
    --accent:#D97757;
    --accent-dark:#E08A6D;
    --accent-soft:#463630;
    --border:#3A3936;
    --border-strong:#4A4945;
    --user-bubble:#393937;
    --overlay:rgba(0,0,0,.55);
    --shadow-menu:0 8px 30px rgba(0,0,0,.45);
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  html,body{height:100%;}
  body{
    font-family:var(--font-ui);
    background:var(--bg);
    color:var(--ink);
    display:flex;
    overflow:hidden;
    font-size:15px;
  }
  body, .sidebar, .main, .composer, .settings-screen, .menu{
    transition:background-color .25s ease, color .25s ease, border-color .25s ease;
  }
  ::selection{background:#EFC7B4; color:#3D3929;}
  button{font-family:var(--font-ui); color:inherit;}

  .spark{display:block;}

  .icon-btn{
    width:32px;height:32px;
    display:flex;align-items:center;justify-content:center;
    border:none;background:transparent;color:var(--ink-soft);
    border-radius:8px;cursor:pointer;
    transition:background .12s ease,color .12s ease;
    flex-shrink:0;
  }
  .icon-btn:hover{background:var(--bg-hover); color:var(--ink);}

  /* ================= SIDEBAR ================= */
  .sidebar{
    width:288px;
    flex-shrink:0;
    background:var(--bg-sidebar);
    border-right:1px solid var(--border);
    height:100vh;
    transition:width .2s ease;
    overflow:hidden;
    position:relative;
  }
  .sidebar-inner{
    width:288px;
    display:flex; flex-direction:column;
    height:100%;
    padding:14px 12px 10px;
  }
  .sb-head{
    display:flex; align-items:center; justify-content:space-between;
    padding:0 4px 12px 8px;
  }
  .wordmark{
    font-family:var(--font-serif);
    font-weight:700; font-size:22px; letter-spacing:-.01em;
    color:var(--ink);
  }
  .sb-head-actions{display:flex; gap:2px;}

  .sb-search{
    display:none;
    position:relative;
    margin:0 2px 10px;
  }
  .sb-search.open{display:block;}
  .sb-search svg{position:absolute; left:10px; top:50%; transform:translateY(-50%); color:var(--ink-soft);}
  .sb-search input{
    width:100%;
    font-family:var(--font-ui);
    font-size:13.5px;
    padding:8px 10px 8px 32px;
    border:1.5px solid var(--accent);
    border-radius:10px;
    background:var(--bg-raised);
    color:var(--ink);
    outline:none;
  }

  .new-chat{
    display:flex;align-items:center;gap:11px;
    background:transparent;
    border:none;
    color:var(--ink);
    font-size:14.5px; font-weight:500;
    padding:7px 8px;
    border-radius:10px;
    cursor:pointer;
    transition:background .12s ease;
    text-align:left;
    width:100%;
  }
  .new-chat:hover{background:var(--bg-hover);}
  .new-chat .plus-badge{
    width:26px;height:26px;border-radius:50%;
    background:#4A4844; color:#fff;
    display:flex;align-items:center;justify-content:center;
    flex-shrink:0;
  }
  :root[data-theme="dark"] .new-chat .plus-badge{background:#5A5854;}

  .side-nav{display:flex; flex-direction:column; gap:1px; margin:4px 0 2px;}
  .side-link{
    display:flex; align-items:center; gap:12px;
    padding:7px 9px; border-radius:10px;
    font-size:14px; color:var(--ink);
    background:transparent; border:none; cursor:pointer; text-align:left;
    transition:background .12s ease;
    width:100%;
  }
  .side-link svg{color:var(--ink-soft); flex-shrink:0;}
  .side-link:hover{background:var(--bg-hover);}
  .side-link.active{background:var(--bg-active); font-weight:600;}
  .side-link .end-icon{margin-left:auto; color:var(--ink-faint);}

  .side-section-label{
    font-size:12.5px; font-weight:500;
    color:var(--ink-soft);
    padding:14px 9px 6px;
    display:flex; align-items:center; justify-content:space-between;
  }
  .side-section-label .icon-btn{width:24px;height:24px;}

  .chat-list{
    list-style:none;
    overflow-y:auto;
    flex:1;
    display:flex; flex-direction:column; gap:1px;
    padding-bottom:6px;
  }
  .chat-item{
    position:relative;
    display:flex; align-items:center;
    font-size:13.5px;
    color:var(--ink);
    border-radius:10px;
    cursor:pointer;
    transition:background .12s ease;
  }
  .chat-item .title{
    flex:1; padding:7px 6px 7px 10px;
    white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
  }
  .chat-item .star{color:var(--accent); margin-right:2px; flex-shrink:0; display:none;}
  .chat-item.starred .star{display:block;}
  .chat-item:hover, .chat-item.menu-open{background:var(--bg-hover);}
  .chat-item.active{background:var(--bg-active);}
  .chat-item .more{
    width:26px;height:26px; margin-right:4px;
    border:none;background:transparent;color:var(--ink-soft);
    border-radius:7px; cursor:pointer;
    display:none; align-items:center; justify-content:center;
    flex-shrink:0;
  }
  .chat-item:hover .more, .chat-item.menu-open .more, .chat-item.active .more{display:flex;}
  .chat-item .more:hover{background:var(--border-strong); color:var(--ink);}

  .sidebar-footer{
    display:flex; align-items:center; gap:10px;
    padding:10px 6px 4px;
    border-top:1px solid var(--border);
    margin-top:6px;
  }
  .sb-user{
    display:flex; align-items:center; gap:10px;
    flex:1; min-width:0;
    border:none; background:transparent; cursor:pointer; text-align:left;
    padding:5px 6px; border-radius:10px;
    transition:background .12s ease;
  }
  .sb-user:hover{background:var(--bg-hover);}
  .avatar{
    width:34px;height:34px;border-radius:50%;
    background:#2B2A27;
    color:#fff;
    display:flex;align-items:center;justify-content:center;
    font-size:13px;font-weight:600;
    flex-shrink:0;
  }
  :root[data-theme="dark"] .avatar{background:#57554F;}
  .sb-user .who{display:flex; flex-direction:column; flex:1; min-width:0;}
  .sb-user .label{
    font-size:14px;color:var(--ink); font-weight:600;
    white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
  }
  .sb-user .plan{font-size:12px;color:var(--ink-soft);}
  .sb-foot-actions{display:flex; align-items:center; gap:4px;}
  .sb-foot-actions .boxed{
    border:1px solid var(--border-strong);
    border-radius:9px;
  }

  /* Trilho de ícones (sidebar recolhida) */
  .sidebar.rail{width:64px;}
  .sidebar.rail .sidebar-inner{display:none;}
  .rail-inner{
    display:none;
    width:64px;
    flex-direction:column;
    align-items:center;
    height:100%;
    padding:14px 0 12px;
    gap:6px;
  }
  .sidebar.rail .rail-inner{display:flex;}
  .rail-inner .plus-badge{
    width:30px;height:30px;border-radius:50%;
    background:#4A4844; color:#fff;
    display:flex;align-items:center;justify-content:center;
    cursor:pointer; border:none;
    margin-bottom:2px;
  }
  .rail-spacer{flex:1;}
  .rail-inner .avatar{width:32px;height:32px; cursor:pointer;}

  /* ================= MENUS ================= */
  .menu{
    position:fixed;
    background:var(--bg-raised);
    border:1px solid var(--border);
    border-radius:14px;
    box-shadow:var(--shadow-menu);
    padding:6px;
    display:none;
    flex-direction:column;
    z-index:220;
    min-width:220px;
  }
  .menu.open{display:flex;}
  .menu-header{
    padding:9px 11px 10px;
    font-size:13px; color:var(--ink-soft);
  }
  .menu-item{
    display:flex; align-items:center; gap:11px;
    padding:9px 11px;
    border-radius:9px;
    font-size:14px;
    color:var(--ink);
    cursor:pointer;
    background:transparent; border:none;
    width:100%; text-align:left;
  }
  .menu-item svg{color:var(--ink-soft); flex-shrink:0;}
  .menu-item:hover{background:var(--bg-hover);}
  .menu-item.danger, .menu-item.danger svg{color:var(--danger);}
  .menu-divider{height:1px; background:var(--border); margin:5px 6px;}
  .menu-item .hint{margin-left:auto; font-size:12px; color:var(--ink-faint);}
  .menu-item .chev-r{margin-left:auto; color:var(--ink-faint);}

  /* ================= MAIN ================= */
  .main{
    flex:1;
    display:flex;
    flex-direction:column;
    height:100vh;
    background:var(--bg);
    position:relative;
    min-width:0;
  }
  .topbar{
    display:flex;align-items:center;justify-content:space-between;
    padding:10px 20px 8px;
    min-height:54px;
  }
  .topbar-left{display:flex;align-items:center;gap:6px; min-width:0;}
  .convo-title-btn{
    display:flex; align-items:center; gap:7px;
    font-size:15px; color:var(--ink); font-weight:600;
    background:transparent; border:none; cursor:pointer;
    padding:6px 10px; border-radius:9px;
    max-width:480px;
    transition:background .12s ease;
  }
  .convo-title-btn:hover{background:var(--bg-hover);}
  .convo-title-btn .t{white-space:nowrap; overflow:hidden; text-overflow:ellipsis;}
  .convo-title-btn svg{color:var(--ink-soft); flex-shrink:0;}
  .convo-title-btn.hidden{display:none;}
  .topbar-right{display:flex; align-items:center; gap:4px;}
  .share-btn{
    display:flex; align-items:center; gap:7px;
    font-size:14.5px; font-weight:500;
    color:var(--ink);
    border:none;
    background:transparent;
    padding:7px 12px; border-radius:9px;
    cursor:pointer;
    transition:background .12s ease;
  }
  .share-btn:hover{background:var(--bg-hover);}

  /* ================= CHAT ================= */
  .chat-area{
    flex:1;
    overflow-y:auto;
    display:flex;
    flex-direction:column;
    align-items:center;
    scroll-behavior:smooth;
  }
  .messages{
    width:100%;
    max-width:768px;
    padding:8px 24px 24px;
    display:flex;
    flex-direction:column;
    gap:26px;
  }

  .hero{
    flex:1; width:100%;
    display:flex; flex-direction:column;
    align-items:center; justify-content:center;
    padding:24px;
    gap:28px;
  }
  .hero-greeting{display:flex; align-items:center; gap:15px;}
  .hero-greeting h1{
    font-family:var(--font-serif);
    font-size:36px;
    font-weight:400;
    letter-spacing:-.01em;
    color:var(--ink-2);
  }
  .hero-dock{width:100%; max-width:740px;}
  .suggestions{
    display:flex; flex-wrap:wrap; gap:9px; justify-content:center;
    max-width:660px;
  }
  .chip{
    display:flex; align-items:center; gap:8px;
    font-size:13.5px; color:var(--ink);
    border:1px solid var(--border-strong);
    background:transparent;
    padding:9px 16px; border-radius:22px;
    cursor:pointer;
    transition:background .12s ease;
  }
  .chip svg{color:var(--ink-soft);}
  .chip:hover{background:var(--bg-hover);}

  .msg{display:flex; flex-direction:column;}
  .msg.user{align-items:flex-end;}
  .msg.user .bubble{
    background:var(--user-bubble);
    padding:11px 16px;
    border-radius:16px;
    max-width:78%;
    font-size:15px;
    line-height:1.6;
    white-space:pre-wrap;
    word-wrap:break-word;
  }
  .msg.assistant .content{
    font-family:var(--font-serif);
    font-size:17px;
    line-height:1.72;
    color:var(--ink-2);
  }
  body.font-system .msg.assistant .content{font-family:var(--font-ui); font-size:15.5px;}
  .msg.assistant .content p{margin-bottom:15px;}
  .msg.assistant .content > *:last-child{margin-bottom:0;}
  .msg.assistant .content h3{
    font-size:18px; font-weight:700; margin:20px 0 9px;
  }
  .msg.assistant .content strong{font-weight:700;}
  .msg.assistant .content em{font-style:italic;}
  .msg.assistant .content ul, .msg.assistant .content ol{
    margin:6px 0 15px 26px;
    display:flex; flex-direction:column; gap:7px;
  }
  .msg.assistant .content code{
    background:var(--bg-code-header);
    padding:2px 6px;
    border-radius:5px;
    font-family:var(--font-mono);
    font-size:13px;
  }

  .codeblock{
    border:1px solid var(--border);
    border-radius:12px;
    overflow:hidden;
    margin:8px 0 16px;
    font-family:var(--font-ui);
  }
  .codeblock-head{
    display:flex; align-items:center; justify-content:space-between;
    background:var(--bg-code-header);
    padding:7px 12px;
    font-size:12px; color:var(--ink-soft);
    border-bottom:1px solid var(--border);
  }
  .codeblock-head button{
    display:flex; align-items:center; gap:5px;
    border:none; background:transparent; color:var(--ink-soft);
    font-size:12px; cursor:pointer; padding:3px 6px; border-radius:6px;
  }
  .codeblock-head button:hover{background:var(--bg-hover); color:var(--ink);}
  .codeblock pre{
    background:var(--bg-code);
    padding:14px 16px;
    overflow-x:auto;
    font-family:var(--font-mono);
    font-size:13px;
    line-height:1.6;
    color:var(--ink);
  }

  /* Cartão de artefato */
  .artifact-card{
    display:flex; align-items:center; gap:16px;
    border:1px solid var(--border);
    background:var(--bg-raised);
    border-radius:14px;
    padding:16px 20px;
    margin:10px 0 16px;
    font-family:var(--font-ui);
    cursor:pointer;
    transition:background .12s ease, border-color .12s ease;
  }
  .artifact-card:hover{border-color:var(--border-strong);}
  .artifact-card .thumb{
    width:52px; height:58px; flex-shrink:0;
    border:1.5px solid var(--border-strong);
    border-radius:9px;
    background:var(--bg);
    display:flex; align-items:center; justify-content:center;
    color:var(--ink-soft);
    transform:rotate(-6deg);
  }
  .artifact-card .ainfo{flex:1; min-width:0;}
  .artifact-card .aname{font-size:15.5px; font-weight:600; color:var(--ink);}
  .artifact-card .ameta{font-size:13px; color:var(--ink-soft); margin-top:3px;}
  .artifact-card .dl{
    border:none; background:transparent;
    font-size:14.5px; font-weight:600; color:var(--ink);
    cursor:pointer; padding:8px 12px; border-radius:9px;
  }
  .artifact-card .dl:hover{background:var(--bg-hover);}

  /* Indicador de geração: spinner pontilhado terracota + resumo do raciocínio */
  .gen-row{padding:14px 0;}
  .dot-spinner{animation:spinDots 1.1s steps(12) infinite; transform-origin:center; display:block;}
  @keyframes spinDots{to{transform:rotate(360deg);}}
  .think-line{
    font-family:var(--font-ui);
    font-size:14.5px;
    color:var(--ink-soft);
    margin-bottom:14px;
  }
  .think-line.shimmering{
    background:linear-gradient(90deg, var(--ink-soft) 25%, var(--ink) 50%, var(--ink-soft) 75%);
    background-size:200% auto;
    -webkit-background-clip:text; background-clip:text;
    -webkit-text-fill-color:transparent;
    animation:shimmer 1.9s linear infinite;
  }
  @keyframes shimmer{to{background-position:-200% center;}}

  .stream-cursor{
    display:inline-block; width:7px; height:16px;
    background:var(--accent);
    border-radius:2px;
    margin-left:2px;
    vertical-align:baseline;
    animation:cursorBlink 1s steps(2) infinite;
  }
  @keyframes cursorBlink{50%{opacity:0;}}

  .msg-actions{
    display:flex; align-items:center; gap:2px;
    margin-top:12px;
    opacity:0;
    transition:opacity .15s ease;
    font-family:var(--font-ui);
  }
  .msg.assistant:hover .msg-actions, .msg-actions.pinned{opacity:1;}
  .act-btn{
    width:32px;height:32px;
    border:none;background:transparent;color:var(--ink-soft);
    border-radius:8px;cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    transition:background .12s ease,color .12s ease;
    position:relative;
  }
  .act-btn:hover{background:var(--bg-hover); color:var(--ink);}
  .act-btn.done{color:var(--accent);}
  .act-btn[data-tip]:hover::after{
    content:attr(data-tip);
    position:absolute; bottom:calc(100% + 6px); left:50%; transform:translateX(-50%);
    background:var(--ink); color:var(--bg);
    font-size:11px; padding:4px 8px; border-radius:6px;
    white-space:nowrap; pointer-events:none; z-index:60;
  }

  /* ================= COMPOSER ================= */
  .dock{
    width:100%;
    display:flex; flex-direction:column; align-items:center;
    padding:0 24px 6px;
  }
  .dock-inner{width:100%; max-width:768px; position:relative;}
  .credit-banner{
    display:flex; align-items:center; gap:9px;
    border:1px solid var(--border);
    border-bottom:none;
    background:var(--bg-raised);
    border-radius:16px 16px 0 0;
    margin:0 10px;
    padding:11px 16px 22px;
    font-size:13.5px; color:var(--ink-2);
  }
  .credit-banner svg{color:var(--ink-soft); flex-shrink:0;}
  .credit-banner .x{
    margin-left:auto;
    border:none; background:transparent; color:var(--ink-soft);
    cursor:pointer; padding:2px; border-radius:6px;
    display:flex;
  }
  .credit-banner .x:hover{color:var(--ink);}
  .credit-banner.hidden{display:none;}
  .composer{
    width:100%;
    border:1px solid var(--border);
    background:var(--bg-input);
    border-radius:26px;
    padding:16px 16px 12px 22px;
    display:flex;
    flex-direction:column;
    gap:12px;
    box-shadow:0 4px 24px rgba(30,29,26,.07);
    position:relative;
    margin-top:-14px;
  }
  .hero-dock .composer{margin-top:0;}
  .composer textarea{
    resize:none;
    border:none; outline:none;
    background:transparent;
    font-family:var(--font-ui);
    font-size:16px;
    line-height:1.5;
    color:var(--ink);
    max-height:220px;
    min-height:26px;
  }
  .composer textarea::placeholder{color:var(--ink-faint);}
  .composer-row{
    display:flex; align-items:center; gap:4px;
  }
  .comp-btn{
    height:34px; min-width:34px;
    border:none;
    background:transparent;
    color:var(--ink-2);
    border-radius:9px;
    cursor:pointer;
    display:flex; align-items:center; justify-content:center; gap:6px;
    padding:0 6px;
    font-size:14px;
    transition:background .12s ease, color .12s ease;
  }
  .comp-btn:hover{background:var(--bg-hover);}
  .composer-spacer{flex:1;}
  .picker-btn{
    display:flex; align-items:center; gap:5px;
    font-size:14.5px; color:var(--ink-2); font-weight:500;
    border:none; background:transparent;
    padding:6px 8px; border-radius:9px; cursor:pointer;
    transition:background .12s ease;
    white-space:nowrap;
  }
  .picker-btn:hover{background:var(--bg-hover);}
  .picker-btn .soft{color:var(--ink-soft); font-weight:400;}
  .picker-btn svg{color:var(--ink-soft);}
  .send-btn{
    width:38px;height:38px;
    border-radius:12px;
    border:none;
    background:var(--accent);
    color:#fff;
    display:flex;align-items:center;justify-content:center;
    cursor:pointer;
    transition:background .12s ease, transform .1s ease;
    flex-shrink:0;
    margin-left:4px;
  }
  .send-btn:hover:not(:disabled){background:var(--accent-dark);}
  .send-btn:active:not(:disabled){transform:scale(.93);}
  .send-btn:disabled{background:#EDBFAC; cursor:default;}
  :root[data-theme="dark"] .send-btn:disabled{background:#5A4038;}
  .stop-btn{
    width:36px;height:36px;
    border-radius:10px;
    border:1.5px solid var(--border-strong);
    background:transparent;
    color:var(--ink-2);
    display:none;
    align-items:center;justify-content:center;
    cursor:pointer;
    transition:background .12s ease;
    flex-shrink:0;
  }
  .stop-btn:hover{background:var(--bg-hover);}
  .stop-btn.visible{display:flex;}

  /* Painel lateral "Conteúdo" */
  .content-panel{
    width:0;
    flex-shrink:0;
    background:var(--bg);
    border-left:1px solid var(--border);
    overflow:hidden;
    transition:width .22s ease;
    height:100vh;
  }
  .content-panel.open{width:400px;}
  .content-panel-inner{
    width:400px;
    height:100%;
    display:flex; flex-direction:column;
    padding:22px 24px;
    overflow-y:auto;
  }
  .content-panel-head{
    display:flex; align-items:center; justify-content:space-between;
    margin-bottom:18px;
  }
  .content-panel-head h2{font-size:19px; font-weight:700; color:var(--ink);}
  .content-empty{
    font-size:13.5px; color:var(--ink-soft);
    padding:26px 0; text-align:center; line-height:1.5;
  }
  .content-item{
    border:1px solid var(--border-strong);
    border-radius:14px;
    background:var(--bg-raised);
    padding:18px;
    margin-bottom:14px;
    cursor:pointer;
    transition:border-color .12s ease;
  }
  .content-item:hover{border-color:var(--ink-faint);}
  .content-item .cname{font-size:15.5px; font-weight:500; color:var(--ink); word-break:break-all;}
  .content-item .ctag{
    display:inline-block;
    margin-top:34px;
    font-size:12px; font-weight:600;
    border:1px solid var(--border-strong);
    color:var(--ink-2);
    padding:4px 10px; border-radius:8px;
  }

  .disclaimer{
    text-align:center;
    font-size:12px;
    color:var(--ink-soft);
    padding:10px 0 12px;
  }
  .disclaimer .demo-note{color:var(--ink-faint);}

  /* Menu de modelo/esforço */
  .model-menu{width:300px;}
  .model-option{
    display:flex; flex-direction:column; gap:2px;
    padding:9px 11px;
    border-radius:9px;
    cursor:pointer;
  }
  .model-option:hover{background:var(--bg-hover);}
  .model-option .mname{
    font-size:14px; color:var(--ink); font-weight:600;
    display:flex; align-items:center; gap:7px;
  }
  .model-option .mname .check{margin-left:auto; color:var(--accent); visibility:hidden;}
  .model-option.selected .mname .check{visibility:visible;}
  .model-option .badge{
    font-size:10px; font-weight:700; letter-spacing:.04em;
    color:var(--accent); background:var(--accent-soft);
    padding:2px 6px; border-radius:5px;
  }
  .model-option .mdesc{font-size:12.5px; color:var(--ink-soft); line-height:1.4;}
  .menu-footer{
    padding:9px 11px;
    font-size:13px; color:var(--ink-soft);
    display:flex; align-items:center; gap:7px;
    cursor:pointer; border-radius:9px;
    background:transparent; border:none; width:100%; text-align:left;
  }
  .menu-footer:hover{background:var(--bg-hover); color:var(--ink);}

  /* Toast */
  .toast{
    position:fixed; bottom:26px; left:50%; transform:translateX(-50%) translateY(20px);
    background:var(--ink); color:var(--bg);
    font-size:13px; padding:9px 16px; border-radius:10px;
    opacity:0; pointer-events:none;
    transition:opacity .2s ease, transform .2s ease;
    z-index:500;
  }
  .toast.show{opacity:1; transform:translateX(-50%) translateY(0);}

  ::-webkit-scrollbar{width:9px; height:9px;}
  ::-webkit-scrollbar-thumb{background:var(--border-strong); border-radius:8px; border:2px solid transparent; background-clip:padding-box;}
  ::-webkit-scrollbar-track{background:transparent;}

  /* ================= PÁGINAS INTERNAS ================= */
  .page{
    flex:1; overflow-y:auto;
    display:none;
    padding:56px 64px 60px;
  }
  .page.active{display:block;}
  .page-inner{max-width:1180px; margin:0 auto;}
  .page-head{
    display:flex; align-items:center; justify-content:space-between;
    gap:18px; margin-bottom:34px; flex-wrap:wrap;
  }
  .page-head h1{
    font-family:var(--font-serif);
    font-size:40px; font-weight:600; letter-spacing:-.01em;
    color:var(--ink);
  }
  .page-head-actions{display:flex; align-items:center; gap:20px;}
  .filter-link{
    display:flex; align-items:center; gap:6px;
    font-size:15px; color:var(--ink);
    border:none; background:transparent; cursor:pointer;
    padding:6px 4px;
  }
  .filter-link .soft{color:var(--ink-soft);}
  .filter-link svg{color:var(--ink-soft);}
  .btn-dark{
    font-size:15px; font-weight:500;
    background:var(--ink); color:var(--bg);
    border:none; border-radius:12px;
    padding:11px 20px; cursor:pointer;
    transition:opacity .12s ease;
  }
  .btn-dark:hover{opacity:.85;}
  .page-search{
    position:relative; margin-bottom:6px;
  }
  .page-search svg{position:absolute; left:18px; top:50%; transform:translateY(-50%); color:var(--ink-soft);}
  .page-search input{
    width:100%;
    font-family:var(--font-ui);
    font-size:16px;
    padding:16px 18px 16px 48px;
    border:1px solid var(--border);
    border-radius:14px;
    background:var(--bg-raised);
    color:var(--ink);
    outline:none;
  }
  .convo-row{
    display:flex; align-items:center; justify-content:space-between; gap:16px;
    padding:24px 20px;
    border-bottom:1.5px solid var(--ink-2);
    cursor:pointer;
    transition:background .12s ease;
  }
  :root[data-theme="dark"] .convo-row{border-bottom-color:var(--border-strong);}
  .convo-row:hover{background:var(--bg-hover);}
  .convo-row .rt{font-size:16px; color:var(--ink); min-width:0; white-space:nowrap; overflow:hidden; text-overflow:ellipsis;}
  .convo-row .rtime{font-size:14.5px; color:var(--ink-soft); flex-shrink:0;}
  .project-card{
    width:100%; max-width:720px;
    background:var(--bg-sidebar);
    border-radius:18px;
    padding:28px 30px;
    cursor:pointer;
    transition:background .12s ease;
    text-align:left; border:none;
    font-family:var(--font-ui);
  }
  .project-card:hover{background:var(--bg-hover);}
  .project-card .pc-title-row{display:flex; align-items:baseline; gap:14px; flex-wrap:wrap;}
  .project-card .pc-title{font-size:19px; font-weight:700; color:var(--ink);}
  .project-card .pc-tag{font-size:15px; color:var(--ink-soft);}
  .project-card .pc-desc{font-size:16.5px; color:var(--ink-2); line-height:1.5; margin-top:14px;}
  .project-card .pc-date{font-size:14.5px; color:var(--ink-soft); margin-top:26px;}
  .page-tabs{display:flex; gap:30px; margin-bottom:40px;}
  .page-tab{
    font-size:16.5px; color:var(--ink-soft);
    border:none; background:transparent; cursor:pointer;
    padding:4px 0;
  }
  .page-tab.active{color:var(--ink); font-weight:700;}
  .artifacts-empty{
    display:flex; flex-direction:column; align-items:center;
    padding:60px 20px 40px;
    text-align:center;
  }
  .artifacts-empty h2{font-size:19px; font-weight:600; color:var(--ink); margin:26px 0 16px;}
  .artifacts-empty p{font-size:16.5px; color:var(--ink-2); line-height:1.55; max-width:420px;}
  .artifacts-empty .btn-dark{margin-top:28px;}

  /* ================= CONFIGURAÇÕES (tela cheia) ================= */
  .settings-screen{
    position:fixed; inset:0;
    background:var(--bg);
    z-index:300;
    display:none;
  }
  .settings-screen.open{display:flex;}
  .settings-nav{
    width:300px; flex-shrink:0;
    border-right:1px solid var(--border);
    padding:22px 18px;
    overflow-y:auto;
  }
  .settings-search{
    position:relative; margin-bottom:20px;
  }
  .settings-search svg{position:absolute; left:12px; top:50%; transform:translateY(-50%); color:var(--ink-soft);}
  .settings-search input{
    width:100%;
    font-family:var(--font-ui);
    font-size:14px;
    padding:10px 12px 10px 38px;
    border:1.5px solid var(--border-strong);
    border-radius:11px;
    background:var(--bg-raised);
    color:var(--ink);
    outline:none;
  }
  .settings-search input:focus{border-color:#7BA7D9;}
  .settings-group-label{
    font-size:13px; color:var(--ink-soft);
    padding:10px 12px 8px;
  }
  .settings-tab{
    display:flex; align-items:center; gap:12px;
    padding:9px 12px; border-radius:10px;
    font-size:14.5px; color:var(--ink);
    cursor:pointer; border:none; background:transparent; width:100%; text-align:left;
    transition:background .12s ease;
  }
  .settings-tab svg{flex-shrink:0; color:var(--ink-soft);}
  .settings-tab:hover{background:var(--bg-hover);}
  .settings-tab.active{font-weight:700;}
  .settings-content{
    flex:1; min-width:0;
    overflow-y:auto;
    position:relative;
  }
  .settings-close{
    position:absolute; top:20px; right:26px;
    z-index:5;
  }
  .settings-body{
    max-width:860px;
    margin:0 auto;
    padding:34px 48px 80px;
  }
  .settings-h{
    font-size:22px; font-weight:700; color:var(--ink);
    margin:34px 0 6px;
  }
  .settings-h:first-child{margin-top:0;}
  .srow{
    display:flex; align-items:center; justify-content:space-between;
    gap:24px;
    padding:22px 0;
    border-bottom:1px solid var(--border-strong);
  }
  .srow .sl{font-size:16px; color:var(--ink); flex-shrink:0;}
  .srow .sd{font-size:14px; color:var(--ink-soft); margin-top:6px; line-height:1.5; max-width:640px;}
  .srow .sd a{color:var(--ink); text-decoration:underline; cursor:pointer;}
  .srow .sval{
    font-size:15.5px; color:var(--ink); text-align:right;
  }
  .srow input[type="text"], .srow select{
    font-family:var(--font-ui);
    font-size:15.5px;
    border:none; background:transparent; color:var(--ink);
    outline:none; text-align:right;
    max-width:240px;
  }
  .srow.block{flex-direction:column; align-items:stretch; gap:8px;}
  .srow.block textarea{
    font-family:var(--font-ui);
    font-size:14.5px;
    border:none; background:transparent; color:var(--ink);
    outline:none; resize:vertical; min-height:56px;
    margin-top:10px;
  }
  .srow.block textarea::placeholder{color:var(--ink-faint);}
  .appearance-icons{display:flex; gap:6px;}
  .appearance-icons .icon-btn.sel{background:var(--bg-active); color:var(--ink);}
  .toggle{
    position:relative; width:40px; height:23px; flex-shrink:0;
    border-radius:12px; background:var(--border-strong); cursor:pointer;
    transition:background .15s ease; border:none;
  }
  .toggle.on{background:var(--accent);}
  .toggle .knob{
    position:absolute; top:2px; left:2px;
    width:19px;height:19px;border-radius:50%;background:#fff;
    transition:transform .15s ease;
    box-shadow:0 1px 3px rgba(0,0,0,.25);
  }
  .toggle.on .knob{transform:translateX(17px);}
  .btn-ghost{
    font-size:13.5px; padding:8px 14px;
    border-radius:9px; border:1px solid var(--border-strong);
    background:transparent; color:var(--ink); cursor:pointer;
    white-space:nowrap;
  }
  .btn-ghost:hover{background:var(--bg-hover);}
  .settings-pane{display:none;}
  .settings-pane.active{display:block;}
  .placeholder-pane{
    padding:60px 0; text-align:center; color:var(--ink-soft); font-size:14.5px;
  }

  @media (max-width:820px){
    .sidebar{position:fixed; z-index:200; height:100%;}
    .hero-greeting h1{font-size:27px;}
    .messages{padding:8px 14px 24px;}
    .dock{padding:0 12px 6px;}
    .settings-nav{display:none;}
    .settings-body{padding:28px 20px 60px;}
  }

/* ================= LOGIN / REGISTRO ================= */
.auth-wrap{
  min-height:100vh; width:100%;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap:26px; padding:24px;
}
.auth-wordmark{font-family:var(--font-serif); font-size:34px; font-weight:700; color:var(--ink);}
.auth-card{
  width:100%; max-width:400px;
  background:var(--bg-raised);
  border:1px solid var(--border);
  border-radius:18px;
  padding:30px 28px;
  display:flex; flex-direction:column; gap:14px;
}
.auth-card h1{font-size:19px; font-weight:700; color:var(--ink); margin-bottom:4px;}
.auth-card label{font-size:13px; color:var(--ink-soft);}
.auth-card input{
  width:100%;
  font-family:var(--font-ui); font-size:15px;
  padding:11px 13px;
  border:1px solid var(--border-strong); border-radius:10px;
  background:var(--bg); color:var(--ink); outline:none;
}
.auth-card input:focus{border-color:var(--ink-faint);}
.auth-card .btn-dark{width:100%; margin-top:6px; padding:12px;}
.auth-err{
  font-size:13.5px; color:var(--danger);
  background:var(--accent-soft);
  border-radius:9px; padding:9px 12px;
}
.auth-alt{font-size:13.5px; color:var(--ink-soft); text-align:center;}
.auth-alt a{color:var(--ink); font-weight:600; text-decoration:none;}