:root{
  --accent:#6b9b3a;
  --accent-rgb: 107,155,58;
  --accent-soft: rgba(var(--accent-rgb), .14);

  --bg:#f0f0f0;
  --card:#fff;
  --text:#222;
  --muted:#666;

  --danger:#e74c3c;
  --danger-soft: rgba(231,76,60,.10);

  --ok:#2e7d32;
  --ok-soft: rgba(46,125,50,.12);

  --shadow:0 2px 10px rgba(0,0,0,.08);
  --radius:14px;
}

*{ box-sizing:border-box; }
html, body{ height:100%; }
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: linear-gradient(180deg, rgba(var(--accent-rgb),.08), transparent 220px), var(--bg);
  color:var(--text);
}

#topbar-container{ position:relative; z-index:10; }

.page{
  max-width: 980px;
  margin: 0 auto;
  padding: 18px 16px 44px;
}

.head{
  display:flex;
  justify-content: space-between;
  align-items:flex-start;
  gap: 12px;
  flex-wrap: wrap;
  margin: 6px 0 14px;
}

.title h1{
  margin:0 0 6px;
  letter-spacing:-0.02em;
  font-size: 22px;
}
.sub{ margin:0; color:var(--muted); font-size:14px; }

.meta{
  display:flex;
  gap: 10px;
  align-items:center;
  padding-top: 6px;
}

.badge{
  display:inline-flex;
  align-items:center;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,.10);
  background: rgba(0,0,0,.03);
  font-weight: 900;
  font-size: 12px;
  white-space: nowrap;
}
.badge.soft{
  border-color: rgba(var(--accent-rgb), .35);
  background: rgba(var(--accent-rgb), .10);
  color: #17310b;
}

.card{
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid rgba(0,0,0,.06);
  padding: 14px;
}

.controls-grid{
  display:grid;
  grid-template-columns: 1fr 1.4fr 1fr auto;
  gap: 12px;
  align-items:end;
}
@media (max-width: 880px){
  .controls-grid{ grid-template-columns: 1fr; }
}

.field label{
  display:block;
  font-size: 13px;
  font-weight: 900;
  margin: 0 0 6px;
  color:#333;
}
.field input, .field select{
  width:100%;
  padding: 10px 12px;
  font-size: 15px;
  border-radius: 12px;
  border: 1px solid rgba(0,0,0,.18);
  background: #fff;
  outline:none;
}
.field input:focus, .field select:focus{
  border-color: rgba(var(--accent-rgb), .55);
  box-shadow: 0 0 0 4px rgba(var(--accent-rgb), .16);
}

.hint{
  margin-top: 6px;
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
}

.actions{
  display:flex;
  gap: 10px;
  justify-content:flex-end;
}
@media (max-width: 880px){
  .actions{ justify-content: stretch; }
  .actions .btn{ flex: 1 1 auto; }
}

.btn{
  border: 1px solid rgba(0,0,0,.12);
  background: #fff;
  color:#222;
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 900;
  cursor:pointer;
  user-select:none;
  white-space: nowrap;
}
.btn:hover{ border-color: rgba(0,0,0,.22); }
.btn:active{ transform: translateY(1px); }

.btn.primary{
  border-color: rgba(var(--accent-rgb), .45);
  background: linear-gradient(180deg, rgba(var(--accent-rgb), .28), rgba(var(--accent-rgb), .14));
  color: #17310b;
}
.btn.primary:hover{ border-color: rgba(var(--accent-rgb), .70); }

.btn.ghost{
  background: rgba(0,0,0,.03);
}

.notice{
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(0,0,0,.10);
  background: rgba(0,0,0,.03);
  color: var(--muted);
  font-weight: 800;
  font-size: 13px;
}
.notice.ok{
  border-color: rgba(var(--accent-rgb), .35);
  background: var(--accent-soft);
  color: #2b4a14;
}
.notice.bad{
  border-color: rgba(231,76,60,.35);
  background: var(--danger-soft);
  color: #6b1f18;
}

.quiz{
  margin-top: 14px;
  padding: 14px;
}

.quiz-top{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.progress{ flex:1 1 auto; }
.p-line{
  height: 10px;
  border-radius: 999px;
  background: rgba(0,0,0,.06);
  overflow:hidden;
  border: 1px solid rgba(0,0,0,.06);
}
.p-bar{
  height: 100%;
  background: var(--accent);
  width:0%;
  transition: width .18s ease;
}
.p-meta{
  display:flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 12px;
  font-weight: 900;
  color: var(--muted);
}

.q-img{
  width:100%;
  max-height: 260px;
  object-fit: contain;
  border-radius: 14px;
  border: 1px solid rgba(0,0,0,.10);
  background: rgba(0,0,0,.03);
  margin: 10px 0 10px;
}

.q{
  margin: 6px 0 12px;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.answers{
  display:grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.answer{
  text-align:left;
  width:100%;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid rgba(0,0,0,.12);
  background: #fff;
  font-size: 15px;
  font-weight: 900;
  cursor:pointer;
  transition: border-color .15s ease, filter .15s ease, transform .05s ease;
}
.answer:hover{ border-color: rgba(var(--accent-rgb), .55); filter: brightness(1.01); }
.answer:active{ transform: translateY(1px); }
.answer[disabled]{ opacity: .75; cursor: default; }

.answer.good{
  border-color: rgba(46,125,50,.35);
  background: var(--ok-soft);
}
.answer.bad{
  border-color: rgba(231,76,60,.35);
  background: var(--danger-soft);
}

.feedback{
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(0,0,0,.08);
}
.fb-head{
  display:flex;
  justify-content: space-between;
  gap: 10px;
  align-items:center;
  flex-wrap: wrap;
}
.fb-badge{
  display:inline-flex;
  align-items:center;
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 900;
  font-size: 12px;
  border: 1px solid rgba(0,0,0,.10);
  background: rgba(0,0,0,.03);
}
.fb-badge.ok{
  border-color: rgba(46,125,50,.35);
  background: var(--ok-soft);
  color: #1e4f21;
}
.fb-badge.bad{
  border-color: rgba(231,76,60,.35);
  background: var(--danger-soft);
  color: #6b1f18;
}
.fb-correct{
  color: var(--muted);
  font-weight: 900;
  font-size: 12px;
}

.explain{
  margin: 10px 0 10px;
  color:#333;
  font-size: 14px;
  line-height: 1.45;
  font-weight: 700;
}

.more{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  font-weight: 900;
  text-decoration: none;
  color: #1b5faa;
  margin-bottom: 10px;
}
.more:hover{ text-decoration: underline; }

.fb-actions{
  display:flex;
  gap: 10px;
  justify-content:flex-end;
  flex-wrap: wrap;
}
@media (max-width: 520px){
  .fb-actions .btn{ flex: 1 1 auto; }
}

.result{ margin-top: 14px; }
.result h2{ margin: 0 0 8px; }
.res{ margin: 0 0 12px; font-weight: 800; color:#333; }
.res-actions{
  display:flex;
  gap: 10px;
  justify-content:flex-end;
  flex-wrap: wrap;
}
@media (max-width: 520px){
  .res-actions .btn{ flex: 1 1 auto; }
}