:root{
  --bg:#F5F2EC;
  --surface:#FFFFFF;
  --ink:#20242B;
  --ink-soft:#5B6168;
  --accent:#2B4257;
  --accent-soft:#DCE6EC;
  --line:#DDD7CB;
  --good:#3F7A52;
  --good-bg:#E7F0EA;
  --bad:#A23B3B;
  --bad-bg:#F6E8E8;
  --radius:8px;
  --mono:"SF Mono","Consolas","Liberation Mono",monospace;
}
*{box-sizing:border-box;}
html,body{margin:0;}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.5;
}
.app{max-width:760px;margin:0 auto;padding:32px 20px 80px;}
.auth-box{max-width:380px;margin:80px auto;padding:28px;background:var(--surface);border:1px solid var(--line);border-radius:8px;}
h1,h2{font-family:Georgia,"Iowan Old Style","Palatino Linotype",serif;margin:0 0 10px;}
h1{font-size:24px;}
h2{font-size:18px;}
.eyebrow{font-family:var(--mono);font-size:12px;color:var(--accent);font-weight:normal;}
.topbar{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:18px;}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin-bottom:18px;}
fieldset.card{border:1px solid var(--line);}
legend{font-family:Georgia,"Iowan Old Style","Palatino Linotype",serif;font-size:16px;padding:0 4px;}
label{display:block;font-size:13px;font-weight:600;margin:10px 0 4px;}
input[type=text],input[type=password],input[type=url],select,textarea{
  width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:6px;
  font-size:14px;font-family:inherit;background:#fbfaf7;color:var(--ink);
}
textarea{font-family:inherit;}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:1px;}
.primary-btn{background:var(--accent);color:#fff;border:none;border-radius:6px;padding:10px 18px;font-size:14px;font-weight:600;cursor:pointer;margin-top:14px;}
.primary-btn:hover{background:#1f324a;}
.link-btn{background:none;border:none;color:var(--accent);font-size:13px;font-weight:600;text-decoration:underline;cursor:pointer;padding:0;}
.hint{font-size:13px;color:var(--ink-soft);margin:6px 0 0;}
.error-text{color:var(--bad);font-size:13px;}
.flash{padding:10px 14px;border-radius:6px;font-size:13px;margin-bottom:14px;}
.flash-success{background:var(--good-bg);color:var(--good);}
.flash-error{background:var(--bad-bg);color:var(--bad);}
.flash-info{background:var(--accent-soft);color:#1c3445;}
table.preview-table{width:100%;border-collapse:collapse;font-size:13px;margin-top:10px;}
table.preview-table th,table.preview-table td{text-align:left;padding:7px 9px;border-bottom:1px solid var(--line);}
table.preview-table th{font-family:var(--mono);font-size:11px;text-transform:uppercase;color:var(--ink-soft);letter-spacing:.04em;}
.radio-row{display:flex;gap:8px;align-items:flex-start;padding:8px 0;border-bottom:1px solid var(--line);font-size:14px;cursor:pointer;}
.radio-row:last-child{border-bottom:none;}
.radio-row input{margin-top:3px;}
.radio-row-clear{color:var(--ink-soft);font-style:italic;}
.inline-form{display:flex;gap:8px;align-items:center;margin-top:10px;flex-wrap:wrap;}
.inline-form select,.inline-form input[type=text]{width:auto;}
@media (max-width:600px){
  .app{padding:24px 14px 70px;}
  .inline-form{flex-direction:column;align-items:stretch;}
  .inline-form select,.inline-form input[type=text]{width:100%;}
}

/* Aufklappbare Schueler-Zeilen mit Liste der gewaehlten Bausteine */
.student-list{margin-top:10px;}
.student-list-head{display:flex;font-family:var(--mono);font-size:11px;text-transform:uppercase;color:var(--ink-soft);letter-spacing:.04em;padding:0 4px 6px;border-bottom:1px solid var(--line);}
.student-list-head span:first-child{flex:1;}
.student-list-head span:nth-child(2){flex:0 0 140px;}
.student-row-wrap{display:flex;align-items:flex-start;gap:14px;border-bottom:1px solid var(--line);}
.student-row-wrap:last-child{border-bottom:none;}
details.student-details{flex:1;}
details.student-details summary{display:flex;align-items:center;gap:16px;padding:10px 4px;cursor:pointer;font-size:14px;}
details.student-details summary .student-name{flex:1;}
.student-progress{font-family:var(--mono);font-size:12.5px;color:var(--ink-soft);white-space:nowrap;flex:0 0 120px;}
.student-details-body{padding:2px 4px 16px 22px;}
.baustein-row{display:flex;gap:12px;padding:7px 0;border-top:1px solid var(--line);font-size:13px;}
.baustein-row:first-child{border-top:none;}
.baustein-meta{flex:0 0 130px;font-family:var(--mono);font-size:11px;color:var(--ink-soft);}
.baustein-meta .cat{display:block;}
.baustein-meta .bid{display:block;color:var(--accent);font-weight:600;margin-top:2px;}
.baustein-text-cell{flex:1;color:var(--ink);}
.student-row-wrap > .link-btn{align-self:center;white-space:nowrap;padding-top:10px;}