:root{
  --navy:#04002b;
  --navy-2:#160f52;
  --blue:#e4ba53;
  --blue-dark:#04002b;
  --gold:#e4ba53;
  --bg:#f7f6f3;
  --panel:#ffffff;
  --line:#e4e1da;
  --txt:#04002b;
  --txt-dim:#5b5870;
  --ok:#16a34a;
  --warn:#d97706;
  --radius:14px;
  --shadow:0 4px 20px rgba(4,0,43,.08);
}
*{box-sizing:border-box}
body{margin:0;font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--txt)}
img{max-width:100%;display:block}

/* ── Topbar ── */
.topbar{
  background:var(--navy);color:#fff;
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 22px;gap:18px;flex-wrap:wrap;
}
.tb-brand{display:flex;align-items:center;gap:10px;font-weight:700}
.tb-brand .dot{width:9px;height:9px;border-radius:50%;background:var(--gold)}
.tb-exam{font-size:.78rem;color:#c7d2e6;padding:3px 10px;border:1px solid #2c4470;border-radius:100px}
.tb-mode-switch{display:flex;gap:6px;background:#0b1a30;border-radius:100px;padding:4px}
.tb-mode-switch button{
  background:transparent;border:none;color:#9fb0c9;font-size:.78rem;font-weight:600;
  padding:7px 14px;border-radius:100px;cursor:pointer;transition:.15s;
}
.tb-mode-switch button.active{background:var(--gold);color:var(--navy)}
.tb-right{display:flex;align-items:center;gap:12px}
.tb-timer{font-variant-numeric:tabular-nums;font-weight:700;background:#0b1a30;padding:6px 12px;border-radius:8px;font-size:.85rem}
.tb-timer.warn{color:#fbbf24}
.tb-btn{background:#0b1a30;border:1px solid #2c4470;color:#fff;font-size:.78rem;font-weight:600;padding:7px 12px;border-radius:8px;cursor:pointer}
.tb-btn.primary{background:var(--gold);border-color:var(--gold);color:#04002b}
.tb-btn.danger{background:#7f1d1d;border-color:#7f1d1d}

/* ── App shell ── */
.app{display:flex;min-height:calc(100vh - 54px)}

/* ── Sidebar ferramentas ── */
.tools{
  width:76px;background:var(--navy-2);flex-shrink:0;
  display:flex;flex-direction:column;align-items:center;gap:4px;padding:16px 0;
}
.tool{
  width:60px;padding:9px 4px;border-radius:10px;background:transparent;border:none;color:#c7d2e6;
  display:flex;flex-direction:column;align-items:center;gap:5px;cursor:pointer;font-size:.62rem;
  line-height:1.15;text-align:center;font-weight:600;transition:.15s;
}
.tool .ic{font-size:1.15rem}
.tool:hover{background:#20406f;color:#fff}
.tool.active{background:var(--gold);color:var(--navy)}

/* ── Main content ── */
.main{flex:1;padding:22px 26px;overflow-x:auto}

/* Question nav strip */
.qnav{display:flex;align-items:center;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.qnav-scroll{display:flex;gap:6px;overflow-x:auto;padding:2px;max-width:640px}
.qnum{
  width:32px;height:32px;flex-shrink:0;border-radius:8px;border:1px solid var(--line);
  background:#fff;color:var(--txt-dim);font-size:.78rem;font-weight:700;cursor:pointer;
}
.qnum.current{background:var(--gold);border-color:var(--gold);color:var(--navy)}
.qnum.answered{background:#eaf6ee;border-color:#bfe6cb;color:var(--ok)}
.qnum.marked{box-shadow:inset 0 0 0 2px var(--warn)}
.qnav-arrow{background:#fff;border:1px solid var(--line);border-radius:8px;width:32px;height:32px;cursor:pointer;font-weight:700;color:var(--txt-dim)}

.meta-row{display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.tag{background:#faf3e3;color:var(--navy);font-size:.72rem;font-weight:700;padding:4px 10px;border-radius:100px}
.diff{font-size:.72rem;font-weight:700;padding:4px 10px;border-radius:100px}
.diff.facil{background:#eaf6ee;color:var(--ok)}
.diff.media{background:#fff4e0;color:var(--warn)}
.diff.dificil{background:#fdeaea;color:#c0392b}
.module-title{font-size:.85rem;color:var(--txt-dim);font-weight:600}

/* Contextualized question layout */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:0}
.split > div{padding:22px 24px}
.split > div:first-child{border-right:1px solid var(--line)}
.block-label{font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--txt-dim);margin-bottom:10px;display:flex;align-items:center;gap:6px}
.contexto-text{font-size:.95rem;line-height:1.75;color:var(--txt)}
.enunciado-text{font-size:.95rem;line-height:1.6;font-weight:600;margin-bottom:14px}
.alt{
  display:flex;gap:12px;align-items:flex-start;padding:12px 14px;border:1px solid var(--line);
  border-radius:10px;margin-bottom:9px;cursor:pointer;transition:.15s;font-size:.88rem;line-height:1.5;
}
.alt:hover{border-color:var(--blue);background:#fdf8ee}
.alt.selected{border-color:var(--blue);background:#fdf3de;font-weight:600}
.alt .radio{width:18px;height:18px;border-radius:50%;border:2px solid var(--line);flex-shrink:0;margin-top:1px}
.alt.selected .radio{border-color:var(--blue);background:radial-gradient(circle,var(--blue) 0 45%,transparent 46%)}

.panel-footer{display:flex;justify-content:space-between;align-items:center;padding:14px 24px;border-top:1px solid var(--line)}
.btn{padding:9px 18px;border-radius:8px;border:1px solid var(--line);background:#fff;font-weight:700;font-size:.82rem;cursor:pointer;color:var(--txt)}
.btn.ghost{background:transparent}
.btn.primary{background:var(--gold);border-color:var(--gold);color:var(--navy)}
.btn.gold{background:var(--gold);border-color:var(--gold);color:#04002b}

/* Chat / árvore de decisão */
.tree-wrap{display:grid;grid-template-columns:1.15fr 1fr;gap:18px}
.chat-panel{padding:20px;max-height:640px;overflow-y:auto;display:flex;flex-direction:column;gap:12px}
.chat-msg{max-width:82%;padding:12px 14px;border-radius:14px;font-size:.87rem;line-height:1.55}
.chat-msg.cliente{align-self:flex-start;background:#f0f2f7;border-bottom-left-radius:4px}
.chat-msg.profissional{align-self:flex-end;background:var(--navy);color:#fff;border-bottom-right-radius:4px}
.chat-msg .who{font-size:.68rem;opacity:.7;margin-bottom:3px;font-weight:700;text-transform:uppercase;letter-spacing:.04em}
.tree-side{padding:20px;display:flex;flex-direction:column;gap:18px;overflow-y:auto;max-height:640px}
.tree-q{border-top:1px solid var(--line);padding-top:16px}
.tree-q:first-child{border-top:none;padding-top:0}
.tree-q-label{font-size:.78rem;font-weight:800;color:var(--navy);margin-bottom:8px}

/* Case */
.case-wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:0}
.case-context{padding:22px 24px;border-right:1px solid var(--line);max-height:640px;overflow-y:auto;font-size:.88rem;line-height:1.7;color:var(--txt)}
.case-context table{width:100%;border-collapse:collapse;margin-top:14px;font-size:.8rem}
.case-context th,.case-context td{border:1px solid var(--line);padding:7px 9px;text-align:left}
.case-context th{background:#f7f9fc}
.case-q-side{padding:22px 24px}
.case-progress{font-size:.75rem;color:var(--txt-dim);font-weight:700;margin-bottom:12px}

/* Modal (rascunho, calculadoras etc.) */
.modal-backdrop{position:fixed;inset:0;background:rgba(15,23,42,.45);display:none;align-items:center;justify-content:center;z-index:50}
.modal-backdrop.open{display:flex}
.modal{background:#fff;border-radius:14px;padding:20px;width:340px;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.modal:has(.nav-modal-grid){width:420px}
.nav-modal-grid{display:flex;flex-wrap:wrap;gap:7px;margin-top:4px}
.modal h3{margin:0 0 4px;font-size:.95rem}
.modal .hint{font-size:.75rem;color:var(--txt-dim);margin-bottom:12px}
.modal textarea{width:100%;height:150px;border:1px solid var(--line);border-radius:8px;padding:10px;font-size:.85rem;resize:vertical;font-family:inherit}
.modal-close{float:right;background:none;border:none;font-size:1.1rem;cursor:pointer;color:var(--txt-dim)}
.calc-display{background:#0f2340;color:#fff;text-align:right;padding:14px;border-radius:8px;font-size:1.3rem;margin-bottom:10px;font-variant-numeric:tabular-nums}
.calc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.calc-grid button{padding:12px 0;border-radius:8px;border:1px solid var(--line);background:#f7f9fc;font-weight:700;cursor:pointer;font-size:.9rem}
.calc-grid button.op{background:#faf3e3;color:var(--navy)}
.stub{font-size:.82rem;color:var(--txt-dim);line-height:1.6}

.pausa-overlay{position:fixed;inset:0;background:var(--navy);color:#fff;display:none;align-items:center;justify-content:center;flex-direction:column;gap:16px;z-index:60;text-align:center;padding:20px}
.pausa-overlay.open{display:flex}
.pausa-overlay h2{margin:0}
.pausa-overlay p{color:#c7d2e6;max-width:420px;font-size:.9rem;line-height:1.6}

.badge-admin{position:fixed;bottom:18px;right:18px;background:var(--navy);color:#fff;font-size:.72rem;font-weight:700;padding:9px 14px;border-radius:100px;box-shadow:var(--shadow);cursor:pointer;z-index:40}

@media (max-width:900px){
  .split,.tree-wrap,.case-wrap{grid-template-columns:1fr}
  .split > div:first-child,.case-context{border-right:none;border-bottom:1px solid var(--line)}
  .tools{width:100%;flex-direction:row;overflow-x:auto;padding:8px}
  .app{flex-direction:column}
  .tool{width:auto;flex-direction:row;padding:8px 10px}
}