/* =========================================================================
   Trilhas de Estudo — tema "Foco" (noturno gamificado). Stylesheet própria,
   independente do design system claro. Sora + Inter + JetBrains Mono.
   ========================================================================= */

:root{
  --bg:#0C1020; --bg-2:#0A0E1B; --panel:#151B30; --panel-2:#1B2340;
  --glass-a:rgba(255,255,255,.04); --glass-b:rgba(255,255,255,.015);
  --line:rgba(255,255,255,.08); --line-2:rgba(255,255,255,.14);
  --text:#E7EAF6; --muted:#9AA3C4; --dim:#6C769B;
  --teal:#2DD4BF; --teal-2:#22B8A6; --amber:#F5B54A; --violet:#8B7CF6; --pink:#F472B6;
  --green:#34D399; --red:#F87171; --sky:#7DD3FC;
  --teal-glow:rgba(45,212,191,.35); --amber-glow:rgba(245,181,74,.3);
  --disp:"Sora",system-ui,sans-serif; --sans:"Inter",system-ui,sans-serif; --mono:"JetBrains Mono",ui-monospace,monospace;
  --radius:18px; --radius-sm:12px; --radius-xs:9px;
  --shadow:0 20px 50px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);line-height:1.62;
  background-image:radial-gradient(1200px 520px at 82% -8%,rgba(139,124,246,.14),transparent),
                   radial-gradient(1000px 520px at -5% 0%,rgba(45,212,191,.10),transparent);
  background-attachment:fixed;min-height:100vh;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.container,.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.narrow{max-width:640px;margin:0 auto}
.muted,.ds-muted{color:var(--muted)}
.stack>*+*{margin-top:1rem}
.row{display:flex;gap:.7rem;align-items:center}
.spread{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;flex-wrap:wrap}

/* ---- glass / cards ----------------------------------------------------- */
.glass,.card{background:linear-gradient(180deg,var(--glass-a),var(--glass-b));border:1px solid var(--line);border-radius:var(--radius);backdrop-filter:blur(8px)}
.pad{padding:26px 30px}
.pad-sm{padding:18px 20px}

/* ---- typography helpers ------------------------------------------------ */
h1,h2,h3,h4{font-family:var(--disp);letter-spacing:-.01em;line-height:1.15}
.h1{font-family:var(--disp);font-weight:700;font-size:2.5rem;letter-spacing:-.02em;line-height:1.08;margin:.1rem 0 .4rem}
.h2{font-family:var(--disp);font-weight:700;font-size:1.7rem;margin:0 0 .3rem}
.h3{font-family:var(--disp);font-weight:600;font-size:1.15rem;margin:0 0 .6rem}
.eyebrow{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);font-weight:600}
.sub{font-size:1.08rem;color:var(--muted);max-width:640px}
.back-link{font-size:.86rem;color:var(--muted);display:inline-block;margin-bottom:1rem}
.back-link:hover{color:var(--teal)}

/* ---- header / nav ------------------------------------------------------ */
.site-header{position:sticky;top:0;z-index:20;background:rgba(12,16,32,.72);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px;gap:1rem}
.nav-top{display:flex;align-items:center;gap:1rem}
.brand{font-family:var(--disp);font-weight:800;font-size:1.28rem;display:flex;align-items:center;gap:.6rem;letter-spacing:-.01em}
.brand .logo{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--teal),var(--violet));display:grid;place-items:center;color:#0b1020;font-weight:800;box-shadow:0 0 22px var(--teal-glow)}
.nav-links{display:flex;gap:.3rem;list-style:none;margin:0;padding:0}
.nav-links a{font-size:.9rem;font-weight:500;color:var(--muted);padding:.45rem .85rem;border-radius:9px;display:block}
.nav-links a:hover{color:var(--text)}
.nav-links a.active{color:var(--text);background:var(--panel-2)}
.hud{display:flex;align-items:center;gap:.9rem}
.token-pill{font-size:.78rem;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:.32rem .75rem;font-variant-numeric:tabular-nums}
.av{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--pink),var(--violet));display:grid;place-items:center;font-weight:700;font-size:.85rem;color:#0b1020}
.nav-logout{background:transparent;border:1px solid var(--line-2);color:var(--muted);border-radius:9px;padding:.4rem .8rem;font:inherit;font-size:.85rem;cursor:pointer}
.nav-logout:hover{border-color:var(--red);color:var(--red)}
.nav-toggle{display:none;background:transparent;border:0;cursor:pointer;flex-direction:column;gap:4px;padding:6px}
.nav-toggle-bar{width:22px;height:2px;background:var(--text);border-radius:2px}

@media(max-width:820px){
  .nav{flex-wrap:wrap;height:auto;padding:12px 0}
  .nav-toggle{display:flex}
  .nav-links,.hud{width:100%;flex-direction:column;align-items:flex-start;gap:.3rem}
  .hud{flex-direction:row;flex-wrap:wrap}
}

/* ---- buttons ----------------------------------------------------------- */
.btn{font-family:var(--sans);font-weight:600;font-size:.92rem;border-radius:11px;padding:.68rem 1.25rem;cursor:pointer;border:1px solid transparent;transition:.18s;display:inline-flex;align-items:center;gap:.5rem;justify-content:center;text-align:center}
.btn-primary{background:linear-gradient(135deg,var(--teal),var(--teal-2));color:#062820;box-shadow:0 0 24px var(--teal-glow)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--line-2);color:var(--text)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.btn-danger{background:transparent;border-color:var(--line-2);color:var(--muted)}
.btn-danger:hover{border-color:var(--red);color:var(--red)}
.btn-block{width:100%}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none;filter:none}

/* ---- flash ------------------------------------------------------------- */
.flash-stack{margin:20px 0 0}
.flash-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.5rem}
.flash-message{padding:.75rem 1rem;border-radius:11px;font-size:.92rem;border:1px solid var(--line-2);background:var(--panel)}
.flash-success{border-color:rgba(52,211,153,.4);background:rgba(52,211,153,.1);color:#a7f3d0}
.flash-error{border-color:rgba(248,113,113,.4);background:rgba(248,113,113,.1);color:#fecaca}
.flash-info{border-color:rgba(125,211,252,.35);background:rgba(125,211,252,.08);color:#bae6fd}

/* ---- forms ------------------------------------------------------------- */
.field{display:flex;flex-direction:column;gap:.4rem;margin-bottom:1.1rem}
.field label,.field>span{font-weight:600;font-size:.9rem;color:var(--text)}
input[type=text],input[type=password],input[type=email],textarea,select{
  width:100%;font:inherit;font-size:.95rem;color:var(--text);background:var(--bg-2);
  border:1px solid var(--line-2);border-radius:var(--radius-sm);padding:.7rem .9rem;transition:.15s}
textarea{resize:vertical;line-height:1.6}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 3px rgba(45,212,191,.18)}
::placeholder{color:var(--dim)}
select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 13px) 50%;background-size:5px 5px;background-repeat:no-repeat}
.form-actions{display:flex;justify-content:flex-end;gap:.7rem;margin-top:1.4rem;flex-wrap:wrap}
.form-errors,.errorlist{color:#fecaca;font-size:.88rem;background:rgba(248,113,113,.1);border:1px solid rgba(248,113,113,.35);border-radius:9px;padding:.6rem .8rem;list-style:none;margin:.3rem 0}

/* ---- page head / badges ------------------------------------------------ */
.page{padding:34px 0 60px}
.page-head{margin-bottom:1.4rem}
.badges{display:flex;gap:.5rem;align-items:center;margin-bottom:.85rem;flex-wrap:wrap}
.faixa{font-size:.72rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;padding:.3rem .75rem;border-radius:999px;background:rgba(45,212,191,.12);color:var(--teal);border:1px solid rgba(45,212,191,.3)}
.faixa--iniciante{background:rgba(52,211,153,.12);color:var(--green);border-color:rgba(52,211,153,.3)}
.faixa--intermediario{background:rgba(125,211,252,.12);color:var(--sky);border-color:rgba(125,211,252,.3)}
.faixa--avancado{background:rgba(139,124,246,.14);color:var(--violet);border-color:rgba(139,124,246,.3)}
.faixa--especialista{background:rgba(245,181,74,.12);color:var(--amber);border-color:rgba(245,181,74,.3)}
.faixa--mestre{background:rgba(244,114,182,.14);color:var(--pink);border-color:rgba(244,114,182,.3)}
.pill{font-size:.78rem;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:.3rem .7rem}
.status-badge{font-size:.72rem;font-weight:600;letter-spacing:.03em;text-transform:uppercase;padding:.25rem .65rem;border-radius:999px;background:var(--panel-2);color:var(--muted)}
.status-badge--concluida{background:rgba(52,211,153,.12);color:var(--green)}
.status-badge--em_andamento{background:rgba(45,212,191,.12);color:var(--teal)}
.status-badge--erro{background:rgba(248,113,113,.12);color:var(--red)}

/* ---- progress ---------------------------------------------------------- */
.progress-bar{height:9px;background:var(--panel-2);border-radius:99px;overflow:hidden;margin:.5rem 0}
.progress-bar>span{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--teal),var(--amber));box-shadow:0 0 12px var(--teal-glow);transition:width .5s ease}
.progress-bar--lg{height:12px}
.progress-label{font-size:.85rem;color:var(--muted);margin-top:.35rem}

/* ---- title chips ------------------------------------------------------- */
.title-chips{display:flex;flex-wrap:wrap;gap:.5rem}
.title-chip{font-size:.78rem;padding:.4rem .7rem;border-radius:9px;background:rgba(245,181,74,.12);color:var(--amber);font-weight:600;border:1px solid rgba(245,181,74,.28)}
.title-chip--muted{background:var(--panel-2);color:var(--muted);border-color:var(--line)}

/* ---- dashboard grid ---------------------------------------------------- */
.trilha-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.25rem;margin-top:1.4rem}
.trilha-card{transition:transform .2s,border-color .2s,box-shadow .2s}
.trilha-card:hover{transform:translateY(-3px);border-color:var(--line-2);box-shadow:var(--shadow)}
.trilha-card a{display:block;padding:22px 24px}
.tc-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:.7rem}
.tc-frac{font-size:.8rem;color:var(--muted);font-variant-numeric:tabular-nums}
.tc-title{font-family:var(--disp);font-weight:600;font-size:1.2rem;margin:0 0 .35rem}
.tc-desc{color:var(--muted);font-size:.9rem;margin:0 0 .9rem}

/* ---- constellation (level map) ---------------------------------------- */
.two-col{display:grid;grid-template-columns:1fr 300px;gap:30px;align-items:start;margin-top:22px}
@media(max-width:900px){.two-col{grid-template-columns:1fr}}
.rail{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px}
.constel{position:relative}
.constel::before{content:"";position:absolute;left:23px;top:16px;bottom:16px;width:2px;background:linear-gradient(var(--teal),var(--line))}
.node{display:flex;gap:.85rem;align-items:center;padding:.5rem 0;position:relative;color:inherit}
.node .bead{width:32px;height:32px;border-radius:50%;flex:none;display:grid;place-items:center;font-weight:700;font-size:.82rem;background:var(--panel-2);color:var(--muted);z-index:1;font-family:var(--disp)}
.node.cur .bead{background:linear-gradient(135deg,var(--teal),var(--teal-2));color:#062820;box-shadow:0 0 18px var(--teal-glow)}
.node.done .bead{background:rgba(45,212,191,.18);color:var(--teal);box-shadow:inset 0 0 0 1px rgba(45,212,191,.4)}
.node.lock{opacity:.5}
a.node:not(.lock):hover .nm{color:var(--teal)}
.node .nm{font-size:.92rem;display:flex;flex-direction:column;gap:.1rem}
.node .nm small{color:var(--dim);font-size:.78rem}

/* full-width level list on detail */
.nivel-list{list-style:none;padding:0;margin:1rem 0 0;display:flex;flex-direction:column;gap:.75rem}
.nivel-row{display:flex;align-items:center;gap:1rem;padding:1rem 1.2rem}
.nivel-row.link{transition:border-color .2s,box-shadow .2s}
.nivel-row.link:hover{border-color:var(--teal);box-shadow:var(--shadow)}
.nivel-row.lock{opacity:.55}
.nivel-num{width:36px;height:36px;border-radius:10px;flex:none;display:grid;place-items:center;font-weight:700;font-family:var(--disp);background:var(--panel-2);color:var(--teal)}
.nivel-row.done .nivel-num{background:rgba(52,211,153,.16);color:var(--green)}
.nivel-main{flex:1;display:flex;flex-direction:column;gap:.15rem}
.nivel-name{font-weight:600}
.nivel-hint,.nivel-resumo{font-size:.82rem;color:var(--muted)}
.nivel-state{font-size:.75rem;color:var(--dim);white-space:nowrap}

/* ---- generation / skeleton states ------------------------------------- */
.gen-h{display:flex;align-items:center;gap:.7rem;font-family:var(--disp);font-weight:600;font-size:1.15rem}
.orb{width:26px;height:26px;border-radius:50%;flex:none;background:conic-gradient(var(--teal),var(--amber),var(--violet),var(--teal));animation:spin 1s linear infinite;-webkit-mask:radial-gradient(farthest-side,transparent 58%,#000 60%);mask:radial-gradient(farthest-side,transparent 58%,#000 60%)}
@keyframes spin{to{transform:rotate(360deg)}}
.pbar{height:8px;background:var(--panel-2);border-radius:99px;margin:1.1rem 0 .7rem;overflow:hidden}
.pbar>i{display:block;height:100%;width:38%;background:linear-gradient(90deg,var(--teal),var(--amber));box-shadow:0 0 12px var(--teal-glow);border-radius:99px;animation:slide 1.5s ease-in-out infinite}
@keyframes slide{0%{margin-left:-38%}100%{margin-left:100%}}
.steps{display:flex;gap:.5rem;flex-wrap:wrap}
.steps span{font-size:.76rem;padding:.25rem .6rem;border-radius:999px;background:var(--panel-2);color:var(--muted)}
.steps .done{color:var(--teal)} .steps .now{color:var(--amber);font-weight:600}
.sk{height:12px;background:linear-gradient(90deg,var(--panel-2) 25%,#232c4e 37%,var(--panel-2) 63%);background-size:400% 100%;border-radius:6px;margin:.55rem 0;animation:sh 1.4s infinite}
@keyframes sh{0%{background-position:100% 0}100%{background-position:0 0}}
.gen-center{text-align:center;padding:3rem 1rem}
.gen-center .orb{margin:0 auto 1rem}

/* ---- markdown body ----------------------------------------------------- */
.markdown-body{line-height:1.75;color:#cdd3ea;font-size:1.02rem}
.markdown-body>*:first-child{margin-top:0}
.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4{font-family:var(--disp);color:var(--text);margin:2rem 0 .6rem}
.markdown-body h2{font-size:1.55rem;padding-bottom:.4rem;border-bottom:1px solid var(--line)}
.markdown-body h3{font-size:1.2rem;color:var(--teal)}
.markdown-body p{margin:.85rem 0}
.markdown-body ul,.markdown-body ol{padding-left:1.4rem;margin:.85rem 0}
.markdown-body li{margin:.35rem 0}
.markdown-body strong{color:var(--text)}
.markdown-body a{color:var(--teal);text-decoration:underline;text-underline-offset:2px}
.markdown-body blockquote{border-left:3px solid var(--violet);margin:1rem 0;padding:.2rem 1rem;color:var(--muted);background:rgba(139,124,246,.06);border-radius:0 8px 8px 0}
.markdown-body code{font-family:var(--mono);font-size:.85em;background:var(--panel-2);padding:.12rem .4rem;border-radius:5px;color:#a7f3e5}
.markdown-body .codehilite code{background:transparent;padding:0;color:inherit}
.markdown-body table{width:100%;border-collapse:collapse;margin:1.2rem 0;font-size:.92rem}
.markdown-body th,.markdown-body td{border:1px solid var(--line-2);padding:.55rem .8rem;text-align:left}
.markdown-body th{background:var(--panel-2);color:var(--text);font-family:var(--sans)}
.markdown-body hr{border:0;border-top:1px solid var(--line);margin:2rem 0}

/* admonitions / callouts */
.markdown-body .admonition{margin:1.4rem 0;padding:1rem 1.15rem;border-radius:14px;border:1px solid var(--line);background:var(--panel);border-left:3px solid var(--muted)}
.markdown-body .admonition-title{font-weight:700;font-size:.7rem;letter-spacing:.09em;text-transform:uppercase;margin:0 0 .4rem;color:var(--muted);display:flex;align-items:center;gap:.45rem}
.markdown-body .admonition-title::before{content:"";width:8px;height:8px;border-radius:50%;background:currentColor}
.markdown-body .admonition>p:last-child{margin-bottom:0}
.markdown-body .admonition.conceito{border-left-color:var(--teal)} .admonition.conceito .admonition-title{color:var(--teal)}
.markdown-body .admonition.exemplo{border-left-color:var(--sky)} .admonition.exemplo .admonition-title{color:var(--sky)}
.markdown-body .admonition.dica{border-left-color:var(--green)} .admonition.dica .admonition-title{color:var(--green)}
.markdown-body .admonition.atencao{border-left-color:var(--amber)} .admonition.atencao .admonition-title{color:var(--amber)}
.markdown-body .admonition.resumo{border-left-color:var(--violet)} .admonition.resumo .admonition-title{color:var(--violet)}

/* ---- lesson layout ----------------------------------------------------- */
.subtopicos-box{margin-bottom:1.6rem}
.subtopicos-box ul{margin:.4rem 0 0;padding-left:1.2rem;color:var(--muted)}
.nivel-cta{margin-top:2.4rem;padding-top:1.6rem;border-top:1px solid var(--line);display:flex;gap:.7rem;flex-wrap:wrap;align-items:center}
.aprovado-note{background:rgba(52,211,153,.1);border:1px solid rgba(52,211,153,.3);color:#a7f3d0;padding:.75rem 1rem;border-radius:11px;width:100%}

/* ---- quiz / exercise --------------------------------------------------- */
.q-block{padding:1.35rem 0;border-bottom:1px solid var(--line)}
.q-block:last-child{border-bottom:none}
.q-enun{font-weight:600;margin:0 0 .8rem;color:var(--text)}
.q-enun .n{color:var(--teal);font-family:var(--disp)}
.opts{display:flex;flex-direction:column;gap:.5rem}
.opt{display:flex;gap:.7rem;align-items:flex-start;padding:.78rem .95rem;border:1px solid var(--line-2);border-radius:11px;cursor:pointer;transition:.15s;background:rgba(255,255,255,.02)}
.opt:hover{border-color:var(--teal);background:rgba(45,212,191,.06)}
.opt input{margin-top:.2rem;accent-color:var(--teal)}
.opt.correct{border-color:var(--teal);background:rgba(45,212,191,.14)}
.opt.wrong{border-color:var(--pink);background:rgba(244,114,182,.12)}
.fb{margin-top:.9rem;border-radius:11px;padding:.85rem 1rem;font-size:.93rem;display:none}
.fb.show{display:block}
.fb.ok{background:rgba(45,212,191,.12);color:#9bf3e3;border:1px solid rgba(45,212,191,.35)}
.fb.no{background:rgba(244,114,182,.1);color:#f9b6d6;border:1px solid rgba(244,114,182,.3)}
.fb.neutral{background:var(--panel-2);color:var(--muted);border:1px solid var(--line-2)}
.ex-actions{margin-top:.9rem;display:flex;gap:.7rem;align-items:center;flex-wrap:wrap}
.ex-reward{font-size:.75rem;color:var(--amber);font-weight:600}
.ex-tag{display:inline-flex;align-items:center;gap:.5rem;font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--teal);margin-bottom:.5rem}
.ex-tag .spark{width:22px;height:22px;border-radius:7px;background:var(--teal);color:#0b1020;display:grid;place-items:center;font-size:.8rem}
.exercise{margin-bottom:1.1rem}
.exercise .pad{border-left:2px solid rgba(45,212,191,.3)}
.spin-sm{width:15px;height:15px;border:2px solid var(--line-2);border-top-color:var(--teal);border-radius:50%;animation:spin .7s linear infinite;display:inline-block}

/* ---- resultado --------------------------------------------------------- */
.resultado-hero{display:flex;align-items:center;gap:1.5rem;padding:1.75rem;border-radius:var(--radius);margin:1rem 0 1.5rem;border:1px solid var(--line-2)}
.resultado-hero.ok{background:rgba(52,211,153,.08);border-color:rgba(52,211,153,.35)}
.resultado-hero.no{background:rgba(245,181,74,.08);border-color:rgba(245,181,74,.35)}
.resultado-nota{font-family:var(--disp);font-weight:700;font-size:3rem;line-height:1}
.resultado-nota span{font-size:1.1rem;color:var(--muted)}
.resultado-msg h2{margin:0 0 .3rem}
.correcao-list{display:flex;flex-direction:column;gap:1rem;margin-top:1rem}
.correcao-item{border:1px solid var(--line);border-left-width:4px;border-radius:var(--radius-sm);padding:1.1rem 1.25rem}
.correcao-item.ok{border-left-color:var(--teal)} .correcao-item.bad{border-left-color:var(--pink)}
.correcao-top{display:flex;align-items:center;gap:.6rem;margin-bottom:.5rem}
.correcao-num{width:1.7rem;height:1.7rem;border-radius:8px;display:grid;place-items:center;background:var(--panel-2);font-weight:700;font-size:.82rem;font-family:var(--disp)}
.correcao-tipo{font-size:.72rem;text-transform:uppercase;letter-spacing:.05em;color:var(--dim)}
.correcao-nota{margin-left:auto;font-weight:700;font-family:var(--disp)}
.correcao-sua{font-size:.9rem;margin:.5rem 0;color:var(--muted)}
.correcao-sua b{color:var(--text)}
.correcao-fb{background:var(--panel-2);border-radius:11px;padding:.75rem 1rem;font-size:.92rem;margin-top:.5rem}

/* ---- auth -------------------------------------------------------------- */
.auth-wrap{min-height:calc(100vh - 140px);display:grid;place-items:center;padding:40px 0}
.auth-card{width:100%;max-width:420px}
.auth-card .pad{padding:34px}
.auth-head{margin-bottom:1.6rem;text-align:center}
.auth-head .logo-lg{width:52px;height:52px;border-radius:15px;margin:0 auto 1rem;background:linear-gradient(135deg,var(--teal),var(--violet));display:grid;place-items:center;color:#0b1020;font-weight:800;font-size:1.4rem;box-shadow:0 0 30px var(--teal-glow)}
.auth-head h1{font-size:1.6rem;margin:0 0 .4rem}
.auth-head p{color:var(--muted);font-size:.92rem;margin:0}
.auth-sep{display:flex;align-items:center;gap:.8rem;color:var(--dim);font-size:.8rem;margin:1.3rem 0}
.auth-sep::before,.auth-sep::after{content:"";flex:1;height:1px;background:var(--line)}
.auth-note{font-size:.8rem;color:var(--dim);text-align:center;margin:.6rem 0 0}

/* ---- empty ------------------------------------------------------------- */
.empty{text-align:center;padding:3rem 1.5rem;border:1px dashed var(--line-2);border-radius:var(--radius);margin-top:1.4rem}
.empty h3{margin:0 0 .5rem} .empty p{color:var(--muted);margin:0 0 1.3rem}

/* ---- footer ------------------------------------------------------------ */
.site-footer{border-top:1px solid var(--line);margin-top:40px}
.footer-in{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:26px 0;flex-wrap:wrap}
.footer-brand{font-family:var(--disp);font-weight:700}
.footer-copy{color:var(--dim);font-size:.82rem;margin:.2rem 0 0}
.footer-points{display:flex;gap:1.2rem;list-style:none;margin:0;padding:0;color:var(--muted);font-size:.82rem;flex-wrap:wrap}
.footer-points li{display:flex;align-items:center;gap:.4rem}
.footer-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--teal)}

/* ---- XP HUD ------------------------------------------------------------ */
.xp{display:flex;align-items:center;gap:.5rem}
.xp .lvl{font-family:var(--disp);font-weight:700;color:var(--teal);font-size:.9rem}
.xp-bar{width:82px;height:7px;border-radius:99px;background:var(--panel-2);overflow:hidden}
.xp-bar>i{display:block;height:100%;background:linear-gradient(90deg,var(--teal),var(--amber));box-shadow:0 0 10px var(--teal-glow)}
.streak{font-size:.85rem;color:var(--amber);font-weight:600}

/* ---- copiar código ----------------------------------------------------- */
.markdown-body .codehilite{position:relative}
.copy-btn{position:absolute;top:8px;right:8px;font:600 .72rem var(--sans);color:var(--muted);
  background:rgba(255,255,255,.06);border:1px solid var(--line-2);border-radius:7px;padding:.25rem .55rem;cursor:pointer;opacity:0;transition:.15s}
.markdown-body .codehilite:hover .copy-btn{opacity:1}
.copy-btn:hover{color:var(--teal);border-color:var(--teal)}

/* ---- índice de tópicos (overview do nível) ----------------------------- */
.topico-index{list-style:none;margin:1.1rem 0 0;padding:0;display:flex;flex-direction:column;gap:.55rem}
.topico-item{display:flex;align-items:center;gap:.9rem;padding:.8rem 1rem;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:rgba(255,255,255,.02);color:inherit;transition:.15s}
.topico-item:hover{border-color:var(--teal);background:rgba(45,212,191,.06)}
.topico-item.done{opacity:.85}
.ti-num{width:30px;height:30px;border-radius:50%;flex:none;display:grid;place-items:center;font-weight:700;font-family:var(--disp);
  background:var(--panel-2);color:var(--teal);font-size:.85rem}
.topico-item.done .ti-num{background:rgba(52,211,153,.16);color:var(--green)}
.ti-main{flex:1;display:flex;flex-direction:column;gap:.1rem}
.ti-title{font-weight:600}
.ti-desc{font-size:.82rem;color:var(--muted)}
.ti-cta{font-size:.82rem;color:var(--teal);white-space:nowrap}

/* ---- etapas do nível --------------------------------------------------- */
.etapas{margin-top:1.2rem}
.etapa-list{list-style:none;margin:1rem 0 0;padding:0;display:flex;flex-direction:column;gap:.7rem}
.etapa{display:flex;align-items:center;gap:.9rem;padding:.7rem 0;border-top:1px solid var(--line)}
.etapa:first-child{border-top:none}
.etapa-ic{width:30px;height:30px;border-radius:50%;flex:none;display:grid;place-items:center;font-weight:700;font-family:var(--disp);
  background:var(--panel-2);color:var(--muted);font-size:.85rem}
.etapa.now .etapa-ic{background:linear-gradient(135deg,var(--teal),var(--teal-2));color:#062820;box-shadow:0 0 16px var(--teal-glow)}
.etapa.done .etapa-ic{background:rgba(52,211,153,.16);color:var(--green)}
.etapa-txt{flex:1;display:flex;flex-direction:column}
.etapa-txt small{color:var(--muted);font-size:.8rem}
.etapa.done .etapa-txt strong{color:var(--green)}
.etapa-btn{margin-left:auto}
.etapa-lock{margin-left:auto;font-size:.82rem;color:var(--dim)}

/* ---- leitor de tópico -------------------------------------------------- */
.topico-progress{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;padding:.7rem 0}
.tp-bar-wrap{flex:1;min-width:180px;display:flex;flex-direction:column;gap:.35rem}
.tp-steps{display:flex;gap:5px}
.tp-step{flex:1;height:7px;border-radius:99px;background:var(--panel-2);transition:.2s}
.tp-step.done{background:var(--green)}
.tp-step.cur{background:linear-gradient(90deg,var(--teal),var(--amber));box-shadow:0 0 10px var(--teal-glow)}
.tp-label{font-size:.78rem;color:var(--muted);align-self:flex-end}
.topico-nav{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin-top:2.4rem;padding-top:1.6rem;border-top:1px solid var(--line)}

@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}