:root{--bg:#f4f7f5;--surface:#fff;--ink:#17271f;--muted:#63736a;--line:#dce6e0;--brand:#173f30;--brand2:#2f7b59;--soft:#e8f3ed;--danger:#a83c3c;--ok:#23714e}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--ink)}a{color:inherit;text-decoration:none}button,input,select{font:inherit}
.shell{display:grid;grid-template-columns:250px 1fr;min-height:100vh}.sidebar{background:var(--brand);color:#fff;padding:24px 18px;position:sticky;top:0;height:100vh}.brand{display:flex;gap:12px;align-items:center;margin-bottom:28px}.mark{width:44px;height:44px;border-radius:13px;background:#fff;color:var(--brand);display:grid;place-items:center;font-weight:900}.brand span{display:block;color:#bcd4c7;font-size:12px;margin-top:3px}.nav{display:grid;gap:7px}.nav a{padding:11px 12px;border-radius:10px;color:#dbe9e1}.nav a:hover,.nav a.active{background:rgba(255,255,255,.11);color:#fff}.main{padding:30px;max-width:1450px;width:100%;margin:auto}.hero{background:linear-gradient(135deg,#173f30,#28664d);color:#fff;border-radius:22px;padding:30px;display:flex;justify-content:space-between;gap:24px;align-items:center}.hero h1{font-size:38px;max-width:780px;margin:8px 0}.hero p{color:#d4e8dd;max-width:760px;line-height:1.65}.eyebrow{font-size:11px;font-weight:900;letter-spacing:.14em;color:#68a889}.hero .eyebrow{color:#a7d4bd}.btn{display:inline-flex;border:0;border-radius:11px;padding:12px 16px;font-weight:900;cursor:pointer;background:var(--brand);color:#fff}.hero .btn{background:#fff;color:var(--brand)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:20px}.card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:20px;box-shadow:0 8px 24px rgba(30,68,52,.045)}.card h2,.card h3{margin:7px 0 10px}.card p{color:var(--muted);line-height:1.55}.stat strong{font-size:34px;display:block;margin-top:5px}.section-title{margin:30px 0 14px}.discipline-card footer{display:flex;justify-content:space-between;align-items:center;margin-top:15px;color:var(--muted)}.discipline-card footer a{color:var(--brand2);font-weight:900}.list{display:grid;gap:12px}.row{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;display:flex;justify-content:space-between;gap:18px;align-items:center}.row span{display:block;color:var(--muted);font-size:13px;margin-top:4px}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:20px}.lesson{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px}.lesson h1{font-size:34px}.lesson p,.lesson li{line-height:1.72;color:#33483d}.lesson code{background:#eef3f0;padding:2px 5px;border-radius:5px}.aside{position:sticky;top:20px;align-self:start}.question{background:#fff;border:1px solid var(--line);border-radius:15px;padding:18px;margin:13px 0}.answers{display:flex;gap:10px;margin-top:14px}.answers button{flex:1;border:1px solid var(--line);background:#fff;border-radius:10px;padding:11px;font-weight:900;cursor:pointer}.answers button.selected{background:var(--brand);color:#fff}.feedback{display:none;margin-top:13px;border-radius:10px;padding:12px;line-height:1.5}.feedback.show{display:block}.feedback.ok{background:#e7f5ed;color:#155d3d}.feedback.bad{background:#fff0f0;color:#8b2d2d}.toolbar{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}.toolbar input,.toolbar select{border:1px solid var(--line);background:#fff;border-radius:10px;padding:11px}.toolbar input{flex:1;min-width:240px}.sim-question{display:none}.sim-question.active{display:block}.progress{height:9px;background:#e7eeea;border-radius:999px;overflow:hidden}.progress span{display:block;height:100%;background:var(--brand2)}.mobile-menu{display:none}.footer-note{text-align:center;color:var(--muted);padding:30px 0}.notice{background:#fff8dd;border:1px solid #eedb91;padding:13px;border-radius:11px;color:#69540b}.empty{text-align:center;color:var(--muted);padding:30px}
@media(max-width:950px){.shell{grid-template-columns:1fr}.sidebar{position:static;height:auto}.nav{grid-template-columns:repeat(4,1fr)}.main{padding:18px}.grid{grid-template-columns:repeat(2,1fr)}.lesson-layout{grid-template-columns:1fr}.aside{position:static}}
@media(max-width:620px){.hero{display:block}.hero h1{font-size:29px}.hero .btn{margin-top:14px}.grid{grid-template-columns:1fr}.nav{grid-template-columns:1fr 1fr}.row{align-items:flex-start}.lesson{padding:19px}.main{padding:12px}.answers{display:grid}}


.question-nav{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:18px;align-items:center}
.question-progress{flex:1}
.question-counter{display:block;font-size:13px;font-weight:900;color:var(--muted);margin-bottom:8px}
.next-question:disabled{opacity:.45;cursor:not-allowed}
.question-finished{margin-top:18px;text-align:center}
.question-finished .btn{margin-top:10px}
@media(max-width:620px){.question-nav{display:grid}.next-question{width:100%}}


/* PMMA QUESTION UX V2 */
.question{
  max-width:900px;
  margin:24px auto;
  padding:34px;
  border:1px solid var(--line);
  border-radius:22px;
  box-shadow:0 14px 38px rgba(23,63,48,.08);
}
.question>.eyebrow{
  display:inline-flex;
  padding:7px 11px;
  border-radius:999px;
  background:var(--soft);
  color:var(--brand2);
  font-size:12px;
  letter-spacing:.1em;
}
.question>p{
  margin:24px 0 28px;
  color:var(--ink);
  font-size:25px;
  line-height:1.58;
  font-weight:650;
  letter-spacing:-.01em;
}
.question .answers{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.question .answers button{
  min-height:64px;
  border:2px solid var(--line);
  border-radius:15px;
  padding:16px 22px;
  font-size:20px;
  font-weight:900;
  background:#fff;
  color:var(--ink);
  transition:.18s ease;
}
.question .answers button:hover:not(:disabled){
  border-color:var(--brand2);
  transform:translateY(-1px);
}
.question .answers button.selected{
  background:var(--brand);
  color:#fff;
  border-color:var(--brand);
}
.question .answers button:disabled{
  cursor:default;
}
.feedback{
  margin-top:22px;
  padding:20px;
  border-radius:15px;
  font-size:17px;
  line-height:1.65;
  border:1px solid transparent;
}
.feedback strong{
  display:block;
  font-size:20px;
  margin-bottom:7px;
}
.feedback.ok{
  background:#e8f7ef;
  color:#155d3d;
  border-color:#bde5cf;
}
.feedback.bad{
  background:#fff0f0;
  color:#8b2d2d;
  border-color:#efc5c5;
}
.question-nav{
  margin-top:24px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:grid;
  grid-template-columns:1fr auto;
  gap:22px;
  align-items:end;
}
.question-progress{
  min-width:0;
}
.question-counter{
  display:block;
  font-size:15px;
  font-weight:900;
  color:var(--muted);
  margin-bottom:10px;
}
.question-progress .progress{
  height:12px;
}
.next-question{
  min-width:210px;
  min-height:54px;
  font-size:16px;
}
.question-finished{
  max-width:900px;
  margin:25px auto;
  padding:34px;
}
#questoes.section-title{
  max-width:900px;
  margin-left:auto;
  margin-right:auto;
}
@media(max-width:700px){
  .question{
    padding:22px;
    margin:16px auto;
    border-radius:17px;
  }
  .question>p{
    font-size:21px;
    line-height:1.52;
  }
  .question .answers{
    grid-template-columns:1fr;
  }
  .question .answers button{
    min-height:58px;
    font-size:18px;
  }
  .question-nav{
    grid-template-columns:1fr;
  }
  .next-question{
    width:100%;
    min-width:0;
  }
}


/* PMMA IMMEDIATE FEEDBACK V3 */
.answers button.correct-answer{
  background:#1f7a4f !important;
  color:#fff !important;
  border-color:#1f7a4f !important;
}
.answers button.wrong-answer{
  background:#b43d3d !important;
  color:#fff !important;
  border-color:#b43d3d !important;
}
.feedback{
  scroll-margin-top:20px;
}
.feedback-result{
  display:flex;
  align-items:center;
  gap:14px;
}
.feedback-result strong{
  margin:0 0 4px;
  font-size:22px;
}
.feedback-result span:not(.feedback-icon){
  display:block;
  font-size:15px;
  font-weight:700;
}
.feedback-icon{
  width:46px;
  height:46px;
  flex:0 0 46px;
  display:grid;
  place-items:center;
  border-radius:50%;
  font-size:27px;
  font-weight:900;
  background:rgba(255,255,255,.72);
}
.feedback-explanation{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid currentColor;
}
.feedback-explanation strong{
  font-size:17px;
  margin:0;
}
.feedback-explanation p{
  margin:7px 0 0;
  font-size:17px;
  line-height:1.65;
  color:inherit;
}
#simFeedback{
  margin-top:22px;
}
#next:disabled,
.next-question:disabled{
  opacity:.4;
  cursor:not-allowed;
}
@media(max-width:620px){
  .feedback-result{
    align-items:flex-start;
  }
  .feedback-result strong{
    font-size:20px;
  }
}