*{box-sizing:border-box;margin:0;padding:0;}
  html,body{height:100%;}
  body{font-family:'Public Sans',sans-serif;transition:background .2s ease,color .2s ease;}

  /* ============ THEME TOKENS ============ */
  body[data-theme="dark"]{
    --bg:#0f1f38; --bg-2:#13263d; --ink:#f5f0e8; --muted:rgba(245,240,232,0.5);
    --rule:rgba(245,240,232,0.09); --rule-strong:rgba(245,240,232,0.2);
    --accent:#e8a838; --accent-soft:rgba(232,168,56,0.12);
    --input-bg:#162844;
  }
  body[data-theme="light"]{
    --bg:#F1EAD9; --bg-2:#FBF7EE; --ink:#1f1a12; --muted:#7a6f5c;
    --rule:rgba(31,26,18,0.14); --rule-strong:rgba(31,26,18,0.28);
    --accent:#c8862a; --accent-soft:rgba(200,134,42,0.14);
    --input-bg:#EFE6D2;
  }
  body{background:var(--bg);color:var(--ink);}
  .serif{font-family:'Source Serif 4',serif;}
  .mono{font-family:'Space Mono',monospace;}

  /* ============ AUTH (split screen) ============ */
  #authScreen{height:100vh;display:flex;background:var(--bg);}
  .auth-brand-panel{width:42%;min-width:340px;background:var(--bg-2);position:relative;overflow:hidden;display:flex;flex-direction:column;justify-content:space-between;padding:44px 40px;}
  .auth-brand-panel .pulse-bg{position:absolute;top:50%;left:-100px;opacity:0.35;transform:translateY(-50%);}
  .auth-brand-panel .pulse-bg path{stroke-dasharray:900;stroke-dashoffset:900;animation:pulseDraw 5s linear infinite;}
  @keyframes pulseDraw{0%{stroke-dashoffset:900;}55%{stroke-dashoffset:0;}100%{stroke-dashoffset:-900;}}
  .auth-brand-top{position:relative;z-index:1;}
  .auth-brand-mid{position:relative;z-index:1;}
  .auth-brand-mid h2{font-family:'Source Serif 4',serif;font-weight:600;font-size:32px;line-height:1.2;color:var(--ink);max-width:340px;}
  .auth-brand-mid p{font-family:'Public Sans',sans-serif;font-size:13.5px;color:var(--muted);margin-top:14px;max-width:320px;line-height:1.6;}
  .auth-live{display:flex;align-items:center;gap:7px;margin-top:18px;}
  .auth-live .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);display:inline-block;animation:blinkDot 1.8s ease-in-out infinite;}
  @keyframes blinkDot{0%,100%{opacity:1;}50%{opacity:0.25;}}
  .auth-live span.txt{font-family:'Space Mono',monospace;font-size:11.5px;color:var(--muted);}
  .auth-brand-bottom{position:relative;z-index:1;font-family:'Space Mono',monospace;font-size:11px;color:var(--muted);}

  .auth-form-panel{flex:1;display:flex;align-items:center;justify-content:center;padding:40px;}
  .auth-card{width:100%;max-width:380px;background:var(--bg-2);border:1px solid var(--rule);border-radius:3px;padding:34px 32px;}
  .brand{display:flex;align-items:baseline;gap:8px;}
  .brand .mark{width:22px;height:12px;}
  .brand .mark path{stroke:var(--accent);stroke-width:2.4;fill:none;}
  .brand span{font-family:'Source Serif 4',serif;font-style:italic;font-weight:600;font-size:23px;color:var(--ink);}

  .auth-tabs{display:flex;gap:26px;border-bottom:1px solid var(--rule);margin-bottom:26px;}
  .auth-tab{padding-bottom:11px;font-size:13.5px;font-weight:600;cursor:pointer;color:var(--muted);border-bottom:2px solid transparent;}
  .auth-tab.active{color:var(--ink);border-bottom-color:var(--accent);}

  .auth-card h2{font-family:'Source Serif 4',serif;font-size:21px;font-weight:600;margin-bottom:6px;color:var(--ink);}
  .auth-card p.sub{color:var(--muted);font-size:12.5px;margin-bottom:22px;}
  .field{margin-bottom:13px;}
  .field label{display:block;font-size:10.5px;color:var(--muted);margin-bottom:5px;font-family:'Space Mono',monospace;text-transform:uppercase;letter-spacing:0.06em;}
  .field input,.field select{width:100%;padding:11px 13px;border:1px solid var(--rule-strong);border-radius:4px;background:var(--input-bg);color:var(--ink);font-family:'Public Sans',sans-serif;font-size:13.5px;}
  .field input:focus,.field select:focus{outline:none;border-color:var(--accent);}
  .field select option{background:var(--bg);color:var(--ink);}
  .field-row{display:flex;gap:8px;}
  .field-row .field{flex:1;}
  .btn{width:100%;padding:12px;border:none;border-radius:4px;background:var(--accent);color:var(--bg);font-weight:600;font-size:13.5px;cursor:pointer;letter-spacing:0.02em;transition:transform .15s ease;}
  .btn:hover{transform:translateY(-2px);}
  .auth-or{display:flex;align-items:center;gap:12px;margin:20px 0;}
  .auth-or .ln{flex:1;height:1px;background:var(--rule);}
  .auth-or span{font-family:'Space Mono',monospace;font-size:11px;color:var(--muted);}
  .btn-google{width:100%;text-align:center;padding:11px;border-radius:4px;border:1px solid var(--rule-strong);font-family:'Public Sans',sans-serif;font-weight:500;font-size:13px;color:var(--ink);cursor:pointer;background:none;}
  .auth-toggle{display:flex;justify-content:center;margin-top:16px;}
  .btn-ghost{background:none;border:none;color:var(--muted);text-decoration:underline;font-size:12.5px;cursor:pointer;padding:6px;}
  .auth-error{color:var(--accent);font-size:12.5px;margin-top:8px;display:none;}
  @media (max-width:820px){ .auth-brand-panel{display:none;} }

  /* ============ APP SHELL ============ */
  #app{display:none;height:100vh;overflow:hidden;}
  .topbar{height:54px;border-bottom:1px solid var(--rule);display:flex;align-items:center;justify-content:space-between;padding:0 20px;}
  .topbar .brand{margin:0;}
  .topbar-actions{display:flex;align-items:center;gap:16px;}
  .theme-toggle{font-family:'Space Mono',monospace;font-size:11px;color:var(--muted);cursor:pointer;border:1px solid var(--rule);padding:5px 10px;background:none;}
  .theme-toggle:hover{border-color:var(--accent);color:var(--accent);}
  .logout-link{font-family:'Space Mono',monospace;font-size:11px;color:var(--muted);cursor:pointer;}

  .shell{display:grid;grid-template-columns:230px 1fr;height:calc(100vh - 54px);}
  .aside-rail{display:none;overflow-y:auto;padding:20px 16px;border-left:1px solid var(--rule);}
  @media (min-width:1020px){
    .shell{grid-template-columns:230px 1fr 260px;}
    .aside-rail{display:block;}
  }
  .aside-card{background:var(--bg-2);border:1px solid var(--rule);border-radius:4px;padding:14px;margin-bottom:14px;}
  .aside-card .ac-title{font-family:'Space Mono',monospace;font-size:10px;text-transform:uppercase;color:var(--muted);letter-spacing:.05em;margin-bottom:10px;}
  .aside-membro-item{display:flex;align-items:center;gap:9px;padding:6px 0;font-size:12px;cursor:pointer;}
  .aside-membro-avatar{width:28px;height:28px;border-radius:50%;background:var(--rule);color:var(--muted);display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden;}
  .aside-vertodos{display:block;text-align:center;margin-top:10px;font-size:11px;color:var(--accent);cursor:pointer;font-family:'Space Mono',monospace;}
  .aside-comm-thumb{display:flex;align-items:center;gap:9px;padding:7px 0;font-size:12px;cursor:pointer;text-decoration:none;color:var(--ink);}
  .aside-comm-thumb .act{width:16px;height:16px;color:var(--muted);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
  .sidebar{border-right:1px solid var(--rule);overflow-y:auto;padding:18px 0;}
  .sb-user{padding:0 18px 16px;border-bottom:1px solid var(--rule);margin-bottom:12px;}
  .sb-user .name{font-weight:600;font-size:13.5px;}
  .sb-user .turma{font-size:11.5px;color:var(--muted);margin-top:2px;}
  .sb-label{font-family:'Space Mono',monospace;font-size:9.5px;letter-spacing:0.1em;text-transform:uppercase;color:var(--muted);padding:14px 18px 6px;}
  .sb-item{display:flex;align-items:center;gap:10px;margin:1px 8px;padding:7px 10px;cursor:pointer;border-radius:6px;font-size:13px;font-weight:500;color:var(--muted);text-decoration:none;transition:background .12s ease,color .12s ease;}
  .sb-item:hover{background:var(--rule);color:var(--ink);}
  .sb-item.active{color:var(--accent);background:var(--accent-soft);font-weight:600;}

  .content{overflow-y:auto;padding:30px 34px;}
  .view{display:none;}
  .view.active{display:block;}
  .view-head{margin-bottom:22px;}
  .view-head .k{font-family:'Space Mono',monospace;font-size:10.5px;text-transform:uppercase;color:var(--muted);letter-spacing:0.06em;}
  .view-head h1{font-family:'Source Serif 4',serif;font-style:italic;font-weight:600;font-size:27px;margin-top:4px;}
  .view-head p{color:var(--muted);font-size:13.5px;margin-top:8px;line-height:1.55;max-width:560px;}

  /* generic block (card-style, v4-esque) */
  .block{background:var(--bg-2);border:1px solid var(--rule);border-radius:4px;padding:14px 16px;margin-bottom:10px;position:relative;overflow:hidden;}
  .block::before{content:'';position:absolute;top:0;left:0;width:3px;height:0;background:var(--accent);transition:height .2s;}
  .block:hover::before{height:100%;}
  .block .b-k{font-family:'Space Mono',monospace;font-size:10px;text-transform:uppercase;color:var(--accent);margin-bottom:5px;letter-spacing:.05em;}
  .block .b-title{font-family:'Source Serif 4',serif;font-weight:600;font-size:16px;margin-bottom:5px;}
  .block .b-body{font-size:13.5px;color:var(--ink);line-height:1.6;}
  .block .b-meta{font-size:11px;color:var(--muted);font-family:'Space Mono',monospace;margin-top:8px;}

  /* Comunidades explorer */
  .com-search{border:1px solid var(--rule);border-radius:4px;padding:9px 13px;margin-bottom:14px;}
  .com-search input{width:100%;border:none;background:none;color:var(--ink);font-family:'Public Sans',sans-serif;font-size:13.5px;}
  .com-search input:focus{outline:none;}
  .com-cats{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:18px;}
  .com-cat{font-size:11.5px;padding:5px 12px;border-radius:20px;border:1px solid var(--rule);color:var(--muted);cursor:pointer;font-family:'Public Sans',sans-serif;}
  .com-cat.active{background:var(--accent-soft);border-color:var(--accent);color:var(--accent);}
  .com-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
  .com-card{background:var(--bg-2);border:1px solid var(--rule);border-radius:4px;padding:14px 15px;cursor:pointer;position:relative;overflow:hidden;display:block;text-decoration:none;color:inherit;}
  .com-card::before{content:'';position:absolute;top:0;left:0;width:3px;height:0;background:var(--accent);transition:height .2s;}
  .com-card:hover::before{height:100%;}
  .com-card .cc-year{font-family:'Space Mono',monospace;font-size:9.5px;color:var(--accent);text-transform:uppercase;margin-bottom:6px;}
  .com-card .cc-name{font-family:'Source Serif 4',serif;font-weight:600;font-size:14.5px;margin-bottom:4px;}
  .com-card .cc-desc{font-size:11.5px;color:var(--muted);line-height:1.5;}
  @media (max-width:600px){ .com-grid{grid-template-columns:1fr;} }
  .ic{width:17px;height:17px;flex-shrink:0;display:flex;align-items:center;justify-content:center;}
  .ic svg{width:16px;height:16px;stroke:var(--muted);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
  .sb-item.active .ic svg{stroke:var(--accent);}

  /* Painel */
  .painel-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:26px;}
  .stat{display:flex;align-items:center;gap:12px;background:var(--bg-2);border:1px solid var(--rule);border-radius:8px;padding:14px 16px;}
  .stat-icon{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
  .stat-icon svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
  .stat .s-num{font-family:'Source Serif 4',serif;font-style:italic;font-weight:600;font-size:22px;color:var(--ink);line-height:1;}
  .stat .s-lbl{font-size:11px;color:var(--muted);margin-top:3px;}
  .turma-membros-count{font-family:'Space Mono',monospace;font-size:11px;color:var(--accent);margin-top:6px;}
  .comm-picker-tabs{display:flex;gap:6px;margin-bottom:8px;}
  .comm-picker-tab{padding:6px 12px;font-size:11.5px;font-weight:600;color:var(--muted);cursor:pointer;border-radius:6px;background:var(--bg-2);border:1px solid var(--rule);}
  .comm-picker-tab.active{background:var(--accent);color:var(--bg);border-color:var(--accent);}
  .cp-materia{width:100%;padding:10px 12px;border:1px solid var(--rule-strong);border-radius:4px;background:var(--input-bg);color:var(--ink);font-family:'Public Sans',sans-serif;font-size:13.5px;}
  .cp-materia option, .cp-materia optgroup{background:var(--bg);color:var(--ink);}

  /* Composer + feed (comunidade engine) */
  .composer{border:1px solid var(--rule);border-radius:8px;padding:14px 16px;margin-bottom:22px;}
  .composer input,.composer textarea{width:100%;border:none;background:none;color:var(--ink);font-family:'Public Sans',sans-serif;font-size:14px;padding:4px 0;resize:none;}
  .composer input:focus,.composer textarea:focus{outline:none;}
  .composer-anexo{display:flex;align-items:center;gap:10px;margin:6px 0;}
  .composer-rule{height:1px;background:var(--rule);margin:6px 0;}
  .feed-controls{display:flex;gap:10px;align-items:center;margin:14px 0 6px;flex-wrap:wrap;}
  .feed-controls select{padding:8px 10px;border:1px solid var(--rule);border-radius:4px;background:var(--input-bg);color:var(--ink);font-family:'Public Sans',sans-serif;font-size:12.5px;}
  .turma-layout{display:grid;grid-template-columns:1fr 220px;gap:20px;align-items:start;}
  .turma-membros-canto{background:var(--bg-2);border:1px solid var(--rule);border-radius:4px;padding:14px;position:sticky;top:16px;}
  .turma-membro-item{display:flex;align-items:center;gap:8px;padding:6px 0;font-size:12px;cursor:pointer;border-bottom:1px dashed var(--rule);}
  .turma-membro-item:last-child{border-bottom:none;}
  .turma-membro-avatar{width:26px;height:26px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center;font-family:'Space Mono',monospace;font-size:10px;font-weight:700;flex-shrink:0;}
  @media (max-width:820px){ .turma-layout{grid-template-columns:1fr;} .turma-membros-canto{position:static;} }
  .subtabs{display:flex;gap:6px;flex-wrap:wrap;margin:16px 0 20px;background:var(--bg-2);border:1px solid var(--rule);border-radius:8px;padding:5px;}
  .subtab{padding:7px 14px;font-size:12.5px;font-weight:600;color:var(--muted);cursor:pointer;border-radius:6px;transition:background .12s ease,color .12s ease;}
  .subtab:hover{background:var(--rule);color:var(--ink);}
  .subtab.active{color:var(--bg);background:var(--accent);font-weight:700;}
  .sistema-card{background:var(--bg-2);border:1px solid var(--rule);border-radius:4px;padding:16px;margin-bottom:14px;}
  .sistema-card img{width:100%;border-radius:4px;margin-bottom:10px;display:block;}
  .sistema-card .sc-title{font-family:'Source Serif 4',serif;font-weight:600;font-size:16px;margin-bottom:6px;}
  .sistema-card .sc-texto{font-size:13.5px;line-height:1.6;color:var(--ink);white-space:pre-wrap;}
  .sistema-card .sc-link{font-size:11px;color:var(--muted);cursor:pointer;margin-top:8px;display:inline-block;}
  .sc-video{position:relative;width:100%;padding-top:56.25%;margin:10px 0;border-radius:4px;overflow:hidden;}
  .sc-video iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:none;}

  /* Leitor protegido de resumo */
  .leitor-wrap{position:relative;background:var(--bg-2);border:1px solid var(--rule);border-radius:4px;padding:26px;overflow:hidden;user-select:none;-webkit-user-select:none;-moz-user-select:none;}
  .leitor-texto{font-size:14.5px;line-height:1.8;white-space:pre-wrap;position:relative;z-index:1;color:var(--ink);}
  .leitor-watermark{position:absolute;inset:0;z-index:2;pointer-events:none;overflow:hidden;opacity:0.09;
    display:flex;flex-wrap:wrap;align-content:space-around;justify-content:space-around;transform:rotate(-22deg) scale(1.4);}
  .leitor-watermark span{font-family:'Space Mono',monospace;font-size:13px;white-space:nowrap;color:var(--ink);margin:18px;}
  .leitor-bloqueio{background:var(--bg-2);border:1px solid var(--rule);border-radius:4px;padding:26px;text-align:center;}
  .leitor-bloqueio p{color:var(--muted);font-size:13.5px;margin-bottom:14px;}
  @media print{
    .leitor-wrap, .leitor-texto{ display:none !important; }
    body::before{ content:"Impressão bloqueada — este conteúdo é protegido."; display:block; padding:40px; font-family:sans-serif; }
  }
  .anexo-btn{font-size:11.5px;color:var(--muted);cursor:pointer;border:1px solid var(--rule);padding:5px 10px;border-radius:4px;font-family:'Public Sans',sans-serif;}
  .anexo-btn:hover{border-color:var(--accent);color:var(--accent);}
  .anexo-nome{font-size:11px;color:var(--accent);font-family:'Space Mono',monospace;}
  .anexo-link{display:inline-block;margin-top:8px;font-size:12px;color:var(--accent);text-decoration:none;border:1px solid var(--rule);padding:5px 10px;border-radius:4px;}
  .anexo-link:hover{border-color:var(--accent);}
  .composer-actions{display:flex;justify-content:flex-end;}
  .composer-actions button{padding:8px 16px;border:1px solid var(--ink);background:var(--ink);color:var(--bg);font-weight:600;font-size:12px;cursor:pointer;}

  .feed-item{background:var(--bg-2);border:1px solid var(--rule);border-radius:8px;padding:16px 18px;margin-bottom:10px;transition:border-color .12s ease;}
  .feed-item:hover{border-color:var(--accent);}
  .feed-item .f-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:6px;}
  .feed-item .f-author{font-weight:600;font-size:13.5px;}
  .badge-prof{font-family:'Space Mono',monospace;font-size:9px;font-weight:700;letter-spacing:.04em;background:var(--accent);color:var(--bg);padding:2px 7px;border-radius:20px;margin-left:2px;}
  .badge-admin{font-family:'Space Mono',monospace;font-size:9px;font-weight:700;letter-spacing:.04em;background:var(--ink);color:var(--bg);padding:2px 7px;border-radius:20px;margin-left:2px;}
  .feed-item .f-time{font-size:10.5px;color:var(--muted);font-family:'Space Mono',monospace;}
  .feed-item .f-title{font-family:'Source Serif 4',serif;font-style:italic;font-weight:600;font-size:15.5px;margin:2px 0 6px;display:block;text-decoration:none;color:var(--ink);cursor:pointer;}
  .feed-item .f-body{font-size:13.5px;line-height:1.6;}
  .feed-item .f-foot{font-size:11.5px;color:var(--muted);font-family:'Space Mono',monospace;cursor:pointer;}
  .feed-item .f-foot-row{margin-top:10px;display:flex;align-items:center;gap:14px;}
  .feed-item .f-link{cursor:pointer;font-size:12px;opacity:0.6;}
  .feed-item .f-link:hover{opacity:1;}
  .feed-item .f-foot:hover{color:var(--accent);}
  .replies-wrap{margin-top:12px;padding-left:14px;border-left:2px solid var(--rule);display:none;}
  .replies-wrap.open{display:block;}
  .reply-line{font-size:12.5px;padding:7px 0;border-bottom:1px dashed var(--rule);}
  .reply-line b{font-weight:600;}
  .reply-row{display:flex;gap:8px;margin-top:10px;}
  .reply-row input{flex:1;padding:7px 0;border:none;border-bottom:1px solid var(--rule);background:none;color:var(--ink);font-size:12.5px;}
  .reply-row input:focus{outline:none;border-color:var(--accent);}
  .reply-row button{border:none;background:none;color:var(--accent);font-family:'Space Mono',monospace;font-size:11.5px;cursor:pointer;}
  .empty-msg{color:var(--muted);font-size:13px;padding:16px 0;}

  /* Biblioteca */
  .mat-row{display:flex;justify-content:space-between;align-items:center;padding:15px 0;border-bottom:1px solid var(--rule);gap:14px;}
  .mat-row .m-title{font-family:'Source Serif 4',serif;font-weight:600;font-size:14.5px;}
  .mat-row .m-desc{font-size:12px;color:var(--muted);margin-top:3px;}
  .badge{font-size:10px;font-family:'Space Mono',monospace;padding:3px 8px;text-transform:uppercase;border:1px solid var(--rule);white-space:nowrap;}
  .badge.paid{color:var(--accent);border-color:var(--accent);}
  .m-action{padding:7px 13px;border:1px solid var(--ink);background:none;color:var(--ink);font-size:11.5px;font-weight:600;cursor:pointer;white-space:nowrap;margin-top:6px;font-family:'Public Sans',sans-serif;}
  .m-action.paid{border-color:var(--accent);color:var(--accent);}
  .m-action:hover{background:var(--ink);color:var(--bg);}
  .m-action.paid:hover{background:var(--accent);color:#fff;}

  ::-webkit-scrollbar{width:7px;}
  ::-webkit-scrollbar-thumb{background:var(--rule-strong);}

  @media (max-width:820px){
    .shell{grid-template-columns:0 1fr;}
    .sidebar{position:fixed;left:0;top:54px;bottom:0;width:78vw;max-width:280px;background:var(--bg);z-index:30;transform:translateX(-100%);transition:transform .2s ease;border-right:1px solid var(--rule);overflow-y:auto;padding-top:18px;}
    .sidebar.open{transform:translateX(0);}
    .content{padding:20px 16px;}
    .painel-grid{grid-template-columns:1fr 1fr;}
  }

  /* menu mobile: hamburger, overlay, botão de fechar */
  .menu-toggle{display:none;background:none;border:none;padding:6px;cursor:pointer;}
  .menu-toggle svg{width:22px;height:22px;stroke:var(--ink);fill:none;stroke-width:2;stroke-linecap:round;}
  .sidebar-close{display:none;}
  .sidebar-overlay{display:none;}
  @media (max-width:820px){
    .menu-toggle{display:block;}
    .sidebar-close{display:block;position:absolute;top:14px;right:14px;background:none;border:none;color:var(--muted);font-size:18px;cursor:pointer;z-index:2;}
    .sidebar-overlay.open{display:block;position:fixed;inset:0;top:54px;background:rgba(0,0,0,0.45);z-index:25;}
  }
  @media (max-width:480px){
    .painel-grid{grid-template-columns:1fr;}
    .field-row{flex-direction:column;}
    .view-head h1{font-size:22px;}
    .auth-form-panel{padding:20px;}
    .auth-card{padding:26px 22px;}
    .topbar{padding:0 12px;}
    .com-grid{grid-template-columns:1fr;}
  }