:root{
  --primary:#1967d2;
  --primary-dark:#104a9b;
  --primary-soft:#eaf2ff;
  --bg:#eef3f8;
  --surface:#fff;
  --surface-soft:#f8fbff;
  --line:#d7e0ec;
  --text:#172033;
  --muted:#627086;
  --ok:#087f5b;
  --ok-bg:#eefbf6;
  --warn:#956700;
  --warn-bg:#fff8df;
  --danger:#aa281f;
  --danger-bg:#fff2f1;
  --violet:#6548c7;
  --code:#111827;
  --shadow:0 8px 28px rgba(15,23,42,.08);
}

*{box-sizing:border-box;min-width:0}
html{scroll-behavior:smooth;overflow-x:hidden}
body{margin:0;min-height:100vh;font-family:"Segoe UI",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.62;overflow-x:hidden}
a{color:var(--primary-dark)}
button{font:inherit;touch-action:manipulation}

.site-header{
  height:46px;background:var(--primary);color:#fff;display:flex;align-items:center;
  justify-content:space-between;gap:12px;padding:0 14px;box-shadow:0 2px 8px #0002
}
.header-left{display:flex;align-items:center;gap:10px;min-width:0}
.site-header h1{margin:0;font-size:17px;font-weight:900;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.portal-link,.home-link{color:#fff;text-decoration:none;font-size:12.5px;font-weight:900;white-space:nowrap}
.portal-link{border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.13);border-radius:999px;padding:5px 9px}
.portal-link:hover{background:rgba(255,255,255,.23)}

.block-menu{
  min-height:48px;background:#fff;border-bottom:1px solid var(--line);display:flex;
  align-items:center;gap:7px;padding:7px 12px;overflow-x:auto;scrollbar-width:thin
}
.block-btn{border:1px solid #bdd2ef;background:#fff;color:var(--primary-dark);border-radius:999px;padding:8px 12px;font-size:12.5px;font-weight:900;white-space:nowrap;cursor:pointer}
.block-btn:hover{background:var(--primary-soft)}
.block-btn.active{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 2px 7px rgba(25,103,210,.25)}

.course-layout{min-height:calc(100vh - 94px);display:grid;grid-template-columns:118px minmax(0,1fr)}
.lesson-menu{background:#fff;border-right:1px solid var(--line);padding:10px 6px 22px;overflow-y:auto}
.lesson-menu h3{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:5px 6px 9px}
.lesson-menu .nav-btn{width:100%;border:0;background:transparent;text-align:left;color:#172033;font-size:12.5px;font-weight:800;line-height:1.2;padding:9px 7px;border-radius:8px;margin:2px 0;cursor:pointer}
.lesson-menu .nav-btn:hover,.lesson-menu .nav-btn.active{background:var(--primary-soft);color:var(--primary-dark)}
.lesson-menu .nav-btn.active{background:var(--primary);color:#fff;box-shadow:0 2px 7px rgba(25,103,210,.28)}

.content-area{width:min(1100px,100%);margin:0 auto;padding:16px clamp(12px,2.3vw,25px) 42px}
.lesson-heading{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(260px,.8fr);gap:18px;align-items:end;margin:0 0 12px}
.block-name{font-size:10.5px;font-weight:900;color:var(--primary);text-transform:uppercase;letter-spacing:.08em}
.lesson-heading h2{font-size:clamp(24px,3vw,35px);line-height:1.08;color:var(--primary-dark);margin:4px 0 0;letter-spacing:-.02em}
.lesson-objective{font-size:12.8px;line-height:1.45;margin:0;padding:11px 13px;background:#fff;border:1px solid var(--line);border-radius:11px;color:#42536a}

.lesson-content{background:var(--surface);border:1px solid var(--line);border-radius:15px;padding:clamp(17px,2.6vw,29px);box-shadow:var(--shadow);overflow:hidden}
.lesson-content>*:first-child{margin-top:0}
.lesson-content h3{font-size:clamp(19px,2vw,23px);line-height:1.25;color:var(--primary-dark);margin:29px 0 8px}
.lesson-content h4{font-size:17px;color:var(--primary-dark);margin:20px 0 7px}
.lesson-content p{margin:8px 0}
.lesson-content ul,.lesson-content ol{margin:8px 0 12px 22px;padding:0}
.lesson-content li{margin:5px 0}
.lesson-content strong{font-weight:800}

.hero-box,.concept-box,.example-box,.note-box,.ok-box,.danger-box,.bridge-box,.essence,.task-box{border-radius:12px;padding:15px 16px;margin:15px 0}
.hero-box{background:linear-gradient(135deg,#eaf3ff 0%,#f8fbff 62%,#fff 100%);border:1px solid #bdd4f4}
.hero-box h3{margin:0 0 7px}
.concept-box,.example-box{background:var(--surface-soft);border:1px solid var(--line)}
.concept-box{border-left:5px solid var(--primary)}
.note-box{background:var(--warn-bg);border-left:5px solid #d59b00}
.ok-box{background:var(--ok-bg);border-left:5px solid var(--ok)}
.danger-box{background:var(--danger-bg);border-left:5px solid var(--danger)}
.bridge-box{background:#f5f2ff;border:1px solid #ded5ff;border-left:5px solid var(--violet)}
.task-box{background:#f8fbff;border:1px solid #bdd4f4;border-left:5px solid var(--primary)}
.essence{border:2px solid #b9d3f6;background:#f8fbff}
.essence>strong{display:block;color:var(--primary-dark);font-size:17px;margin-bottom:4px}

.flow{background:#f8fbff;border:1px solid var(--line);border-radius:10px;padding:13px 14px;margin:13px 0;font-family:Consolas,"Courier New",monospace;white-space:pre-wrap;line-height:1.55;overflow-wrap:anywhere}
.code-block{background:var(--code);color:#f8fafc;border-radius:10px;padding:13px 15px;margin:11px 0 14px;overflow:auto;font-family:Consolas,"Courier New",monospace;font-size:13px;line-height:1.5;white-space:pre}
.code-block-wrap{margin:11px 0 14px;background:var(--code);border-radius:10px;overflow:hidden;box-shadow:0 1px 0 rgba(15,23,42,.08)}
.code-block-wrap .code-block{margin:0;border-radius:0;box-shadow:none}
.code-block-toolbar{display:flex;justify-content:flex-end;align-items:center;min-height:36px;padding:5px 7px;background:#0b1220;border-bottom:1px solid rgba(255,255,255,.1)}
.copy-code-btn{border:1px solid rgba(255,255,255,.24);background:rgba(255,255,255,.09);color:#e5edf8;border-radius:7px;padding:5px 10px;font-size:11.5px;font-weight:800;line-height:1.2;cursor:pointer;transition:background .15s ease,border-color .15s ease,transform .15s ease}
.copy-code-btn:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.38)}
.copy-code-btn:active{transform:translateY(1px)}
.copy-code-btn:focus-visible{outline:2px solid #93c5fd;outline-offset:2px}
.copy-code-btn.copied{background:#0f766e;border-color:#5eead4;color:#fff}
.inline-code{background:#eef4fb;border:1px solid #d6e0ee;border-radius:5px;padding:1px 5px;font-family:Consolas,"Courier New",monospace;font-size:.95em}

.mini-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px;margin:14px 0}
.mini-card{background:var(--surface-soft);border:1px solid var(--line);border-radius:10px;padding:13px}
.mini-card strong{display:block;color:var(--primary-dark);margin-bottom:3px}
.term-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:13px 0}
.term-grid>div{background:#fff;padding:10px 12px}
.term-grid .head{background:#eaf2ff;color:var(--primary-dark);font-weight:900}

.lesson-navigation{display:flex;gap:9px;flex-wrap:wrap;justify-content:space-between;border-top:1px solid var(--line);padding-top:18px;margin-top:27px}
.action-button{border:1px solid #b9d3f6;background:#fff;color:var(--primary-dark);font-weight:850;border-radius:9px;padding:10px 13px;cursor:pointer}
.action-button.primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.action-button:hover{filter:brightness(.98)}

@media(max-width:900px){
  .lesson-heading{grid-template-columns:1fr;gap:7px;align-items:start}
  .lesson-objective{max-width:760px}
}

@media(max-width:760px){
  .site-header{height:44px;padding:0 9px}
  .site-header h1{font-size:14px}
  .home-link{display:none}
  .portal-link{font-size:11px;padding:5px 8px}
  .block-menu{position:sticky;top:0;z-index:60;min-height:45px;padding:6px 7px;gap:6px}
  .block-btn{font-size:11.5px;padding:7px 9px}
  .course-layout{display:block;min-height:0}
  .lesson-menu{position:sticky;top:45px;z-index:55;display:flex;align-items:center;gap:6px;padding:6px 7px;overflow-x:auto;overflow-y:hidden;border-right:0;border-bottom:1px solid var(--line);box-shadow:0 2px 6px rgba(15,23,42,.05)}
  .lesson-menu h3{display:none}
  .lesson-menu .nav-btn{width:auto;min-width:max-content;margin:0;padding:7px 9px;font-size:11.5px}
  .content-area{padding:12px 8px 32px}
  .lesson-heading{margin-bottom:8px}
  .lesson-heading h2{font-size:23px}
  .lesson-objective{font-size:12px;padding:9px 10px}
  .lesson-content{padding:16px 13px;border-radius:11px}
  .lesson-content h3{font-size:19px;margin-top:25px}
  .mini-grid,.term-grid{grid-template-columns:1fr}
  .term-grid .head{display:none}
  .code-block{font-size:12px;padding:12px;max-width:100%}
  .code-block-toolbar{min-height:34px;padding:4px 6px}
  .copy-code-btn{min-height:30px;padding:5px 10px}
  .lesson-navigation{align-items:stretch}
  .lesson-navigation .action-button{flex:1 1 100%;text-align:center}
}

@media(max-width:390px){
  .site-header h1{font-size:13px}
  .portal-link{max-width:92px;overflow:hidden;text-overflow:ellipsis}
  .content-area{padding-left:7px;padding-right:7px}
  .lesson-content{padding-left:11px;padding-right:11px}
}

/* MbB: codigo responsivo sem alterar o conteudo enviado pelo botao Copiar. */
@media(max-width:820px){
  .code-block{white-space:pre-wrap;overflow-wrap:anywhere;word-break:normal;min-width:0;max-width:100%;overflow-x:hidden;}
}