:root{
  --ink:#16241f;
  --paper:#f7f5ef;
  --paper-dim:#eeebe1;
  --green:#25493c;
  --gold:#c99a3d;
  --gold-soft:#e8d5a4;
  --red:#a1402f;
  --line: rgba(22,36,31,0.14);
  --serif: 'Iowan Old Style', 'Palatino Linotype', Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  min-height:100vh;
  display:flex;
  justify-content:center;
  padding:48px 20px 80px;
  line-height:1.5;
}
.app{
  width:100%;
  max-width:640px;
}
header.brand{
  display:flex;
  align-items:baseline;
  gap:10px;
  margin-bottom:36px;
  border-bottom:2px solid var(--ink);
  padding-bottom:14px;
}
header.brand h1{
  font-family:var(--serif);
  font-size:28px;
  font-weight:600;
  margin:0;
  letter-spacing:0.2px;
}
header.brand span{
  font-size:13px;
  color:var(--green);
  font-style:italic;
  font-family:var(--serif);
}

/* ---------- Obrazovka nahrávání ---------- */
.dropzone{
  background:var(--paper-dim);
  border:1.5px dashed var(--line);
  border-radius:2px;
  padding:56px 32px;
  text-align:center;
  cursor:pointer;
  transition:border-color .15s ease, background .15s ease;
}
.dropzone:hover, .dropzone.drag{
  border-color:var(--green);
  background:#e9e5d6;
}
.dropzone input{display:none;}
.dropzone .glyph{
  font-family:var(--serif);
  font-size:42px;
  color:var(--green);
  margin-bottom:6px;
  display:block;
}
.dropzone p{margin:4px 0;}
.dropzone .lead{font-size:16px; font-weight:600;}
.dropzone .sub{font-size:13px; color:#5b6b63;}

.filecard{
  display:flex;
  align-items:center;
  justify-content:space-between;
  background:var(--paper-dim);
  border:1px solid var(--line);
  padding:14px 18px;
  margin-top:18px;
  font-size:14px;
}
.filecard button{
  background:none;
  border:none;
  color:var(--red);
  cursor:pointer;
  font-size:13px;
  font-family:var(--sans);
  text-decoration:underline;
}

.controls-row{
  display:flex;
  gap:14px;
  align-items:center;
  margin-top:22px;
}
label.count-label{
  font-size:13px;
  color:#5b6b63;
  display:flex;
  align-items:center;
  gap:8px;
}
select{
  font-family:var(--sans);
  font-size:13px;
  padding:6px 8px;
  border:1px solid var(--line);
  background:var(--paper);
  color:var(--ink);
}

button.primary{
  font-family:var(--sans);
  font-weight:600;
  font-size:15px;
  background:var(--green);
  color:var(--paper);
  border:none;
  padding:13px 26px;
  cursor:pointer;
  margin-top:26px;
  width:100%;
  letter-spacing:0.2px;
  transition:background .15s ease;
}
button.primary:hover:not(:disabled){background:#1c3a30;}
button.primary:disabled{
  background:#b9b6a9;
  cursor:not-allowed;
}

/* ---------- Průběh / načítání ---------- */
.status{
  margin-top:26px;
  font-size:13.5px;
  color:var(--green);
  display:flex;
  align-items:center;
  gap:10px;
  min-height:20px;
}
.spinner{
  width:14px;height:14px;
  border:2px solid var(--gold-soft);
  border-top-color:var(--gold);
  border-radius:50%;
  animation:spin .8s linear infinite;
  flex:0 0 auto;
}
@keyframes spin{to{transform:rotate(360deg);}}
.error-box{
  margin-top:20px;
  background:#f5e4df;
  border-left:3px solid var(--red);
  padding:12px 16px;
  font-size:13.5px;
  color:#6d2418;
}

/* ---------- Obrazovka kvízu ---------- */
.hidden{display:none !important;}

.quiz-meta{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  margin-bottom:10px;
  font-size:13px;
  color:#5b6b63;
}
.progress-track{
  height:4px;
  background:var(--paper-dim);
  margin-bottom:30px;
  position:relative;
}
.progress-fill{
  height:100%;
  background:var(--gold);
  transition:width .25s ease;
}

.q-number{
  font-family:var(--serif);
  font-style:italic;
  color:var(--green);
  font-size:15px;
  margin-bottom:8px;
}
.q-text{
  font-family:var(--serif);
  font-size:22px;
  line-height:1.4;
  margin:0 0 26px;
}
.options{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-bottom:22px;
}
.option{
  text-align:left;
  background:var(--paper);
  border:1.5px solid var(--line);
  padding:14px 16px;
  font-family:var(--sans);
  font-size:15px;
  cursor:pointer;
  display:flex;
  gap:12px;
  color:var(--ink);
  transition:border-color .12s ease, background .12s ease;
}
.option:hover:not(:disabled){border-color:var(--green);}
.option .tag{
  font-weight:700;
  color:var(--green);
  flex:0 0 auto;
}
.option.correct{
  border-color:var(--green);
  background:#e2ead9;
}
.option.correct .tag{color:var(--green);}
.option.incorrect{
  border-color:var(--red);
  background:#f5e4df;
}
.option.incorrect .tag{color:var(--red);}
.option:disabled{cursor:default;}

.explain{
  font-size:14px;
  background:var(--paper-dim);
  border-left:3px solid var(--gold);
  padding:12px 16px;
  margin-bottom:20px;
  color:#3a4a43;
}
.nav-row{
  display:flex;
  justify-content:flex-end;
}
button.next{
  font-family:var(--sans);
  font-weight:600;
  font-size:14px;
  background:var(--ink);
  color:var(--paper);
  border:none;
  padding:11px 22px;
  cursor:pointer;
}
button.next:hover{background:#000;}

/* ---------- Výsledky ---------- */
.results h2{
  font-family:var(--serif);
  font-size:30px;
  margin:0 0 6px;
}
.score-big{
  font-family:var(--serif);
  font-size:56px;
  color:var(--green);
  margin:18px 0 6px;
}
.results .sub{color:#5b6b63; font-size:14px; margin-bottom:30px;}
.review-item{
  border-top:1px solid var(--line);
  padding:16px 0;
  font-size:14px;
}
.review-item .q{font-weight:600; margin-bottom:6px;}
.review-item .a-wrong{color:var(--red);}
.review-item .a-right{color:var(--green);}
button.restart{
  margin-top:30px;
}