:root{
    color-scheme: dark;
    --bg:#1B1F33;
    --bg-elevated:#242A45;
    --white:#FFFFFF;
    --paper-ink:#1B1F33;

    --terracotta:#2563EB;
    --terracotta-soft:#1E3358;
    --accent:#E11D48;
    --accent-soft:#3A1626;
    --accent-text:#FF9DBB;

    --ink:#F5F6FF;
    --ink-soft:#C3C7E6;
    --muted:#8B90B3;
    --tint:#2A2F4C;
    --line:#3A4066;

    --error:#FF6B6B;
    --error-soft:#3A1A1E;
    --success:#34D399;
    --success-soft:#123626;

    --yellow:#F5C518;
    --yellow-ink:#1B1F33;
    --lime:#C7E86B;
    --lime-soft:#2A3018;

    --fs-base-front:16;
    --fs-base-back:16;
    --radius:16px;
  }
  *{box-sizing:border-box;}
  @media (prefers-reduced-motion: reduce){ *{transition:none !important;} }
  html{height:100%;}
  body{
    margin:0;
    height:100%;
    overflow:hidden;
    background:var(--bg);
    color:var(--ink);
    font-family:'Inter',sans-serif;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3{font-family:'Baloo 2',sans-serif; margin:0;}
  button:focus-visible, input:focus-visible, select:focus-visible{
    outline:2px solid var(--terracotta); outline-offset:2px;
  }
  .app{
    display:grid;
    grid-template-columns: 360px 1fr;
    height:100vh;
  }
  @media (max-width: 860px){
    .app{grid-template-columns:1fr;}
  }

  /* ---------- Sidebar ---------- */
  .sidebar{
    background:var(--bg-elevated);
    border-right:1px solid var(--line);
    padding:14px 20px 12px;
    display:flex;
    flex-direction:column;
    gap:10px;
    overflow-y:auto;
    overflow-x:hidden;
    min-width:0;
  }
  .brand{
    display:flex;
    flex-direction:row;
    align-items:center;
    gap:10px;
    border-bottom: 3px solid transparent;
    border-image: linear-gradient(90deg, var(--terracotta), var(--accent)) 1;
    padding-bottom:10px;
  }
  .brand-mark{
    width:30px;
    height:30px;
    display:block;
  }
  .brand .tag{
    font-family:'IBM Plex Mono',monospace;
    font-size:11px;
    letter-spacing:0.12em;
    text-transform:uppercase;
    color:var(--terracotta);
  }
  .brand h1{
    font-size:20px;
    font-weight:800;
    background:linear-gradient(90deg, var(--terracotta), var(--accent));
    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
  }
  .brand p{display:none;}

  .section-label{
    font-family:'Baloo 2',sans-serif;
    font-weight:700;
    font-size:13px;
    letter-spacing:0.03em;
    text-transform:uppercase;
    color:var(--muted);
    margin-bottom:6px;
    display:block;
  }

  .sidebar-section{ margin-bottom:2px; }
  .sidebar-section summary.section-label{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:8px;
    cursor:pointer;
    user-select:none;
    list-style:none;
    margin-bottom:0;
    padding:9px 12px;
    background:var(--tint);
    border:1px solid var(--line);
    border-radius:10px;
    transition:border-color .15s ease, background .15s ease;
  }
  .sidebar-section summary.section-label::-webkit-details-marker{ display:none; }
  .sidebar-section summary.section-label .toggle-hint{
    font-family:'Baloo 2',sans-serif;
    font-size:12px;
    letter-spacing:normal;
    text-transform:none;
    color:var(--terracotta);
    font-weight:600;
    display:inline-flex;
    align-items:center;
    gap:3px;
    white-space:nowrap;
  }
  .sidebar-section summary.section-label .toggle-hint .chev{
    display:inline-block;
    transition:transform .15s ease;
  }
  .sidebar-section[open] summary.section-label .toggle-hint .chev{ transform:rotate(180deg); }
  .sidebar-section[open] summary.section-label .toggle-hint .txt-closed{ display:none; }
  .sidebar-section:not([open]) summary.section-label .toggle-hint .txt-open{ display:none; }
  .sidebar-section summary.section-label:hover{
    border-color:var(--terracotta);
    background:var(--terracotta-soft);
  }
  .sidebar-section summary.section-label:hover, .sidebar-section summary.section-label:hover .toggle-hint{ color:var(--ink); }
  .sidebar-section summary.section-label + *{ margin-top:10px; }

  .dropzone{
    border:2px dashed var(--line);
    border-radius:var(--radius);
    padding:12px 16px;
    text-align:center;
    cursor:pointer;
    transition:border-color .15s ease, background .15s ease;
    background:var(--tint);
  }
  .dropzone:hover, .dropzone.drag{
    border-color:var(--terracotta);
    background:var(--terracotta-soft);
  }
  .dropzone .icon{font-size:20px; display:block; margin-bottom:4px;}
  .dropzone .main{font-size:14px; font-weight:500; color:var(--ink);}
  .dropzone .sub{font-size:12px; color:var(--muted); margin-top:4px;}
  .dropzone input{display:none;}

  .file-chip{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:8px;
    background:var(--terracotta-soft);
    border:1px solid var(--terracotta);
    border-radius:10px;
    padding:9px 12px;
    font-size:13px;
    color:var(--ink);
  }
  .file-chip .name{
    overflow:hidden;
    text-overflow:ellipsis;
    white-space:nowrap;
    font-family:'Baloo 2',sans-serif;
    font-weight:600;
  }
  .file-chip button{
    border:none;
    background:none;
    color:var(--ink-soft);
    cursor:pointer;
    font-size:13px;
    font-family:'IBM Plex Mono',monospace;
    text-decoration:underline;
    padding:0;
  }

  .field{display:flex; flex-direction:column; gap:4px; min-width:0;}
  .field label.title{font-family:'Baloo 2',sans-serif; font-size:13px; font-weight:600; color:var(--ink);}
  select{
    font-family:'Inter',sans-serif;
    font-size:13px;
    padding:6px 10px;
    border-radius:10px;
    border:1px solid var(--line);
    background:var(--tint);
    color:var(--ink);
    width:100%;
  }

  .toggle-row{
    display:flex;
    align-items:flex-start;
    gap:10px;
    padding:6px 10px;
    background:var(--tint);
    border:1px solid var(--line);
    border-radius:10px;
  }
  .toggle-row input{margin-top:3px; accent-color:var(--terracotta);}
  .toggle-row .t-title{font-family:'Baloo 2',sans-serif; font-size:14px; font-weight:600; color:var(--ink);}
  .toggle-row .t-sub{font-size:12px; color:var(--muted); margin-top:2px; line-height:1.4;}

  .slider-row{display:flex; align-items:center; gap:10px; min-width:0;}
  .slider-row input[type=range]{flex:1; min-width:0; width:100%; accent-color:var(--terracotta);}
  .slider-row .val{
    font-family:'Baloo 2',sans-serif;
    font-weight:600;
    font-size:13px;
    color:var(--ink-soft);
    width:42px;
    text-align:right;
  }

  .btn{
    font-family:'Baloo 2',sans-serif;
    font-size:14px;
    border:none;
    border-radius:10px;
    padding:9px 16px;
    font-weight:700;
    cursor:pointer;
    transition:transform .1s ease, filter .15s ease, background .15s ease;
  }
  .btn:active{transform:scale(0.97);}
  .btn:disabled{opacity:0.4; cursor:not-allowed;}
  .btn-secondary{background:var(--yellow); color:var(--yellow-ink);}
  .btn-secondary:hover:not(:disabled){filter:brightness(1.08);}
  .btn-primary{background:var(--terracotta); color:var(--white);}
  .btn-primary:hover:not(:disabled){filter:brightness(1.12);}
  .btn-outline{background:var(--accent); border:none; color:var(--white);}
  .btn-outline:hover:not(:disabled){filter:brightness(1.12);}
  .btn-block{width:100%;}

  .stats{
    font-size:13px;
    color:var(--lime);
    background:var(--lime-soft);
    border-radius:10px;
    padding:10px 12px;
    line-height:1.5;
  }
  .stats b{color:var(--white);}

  .error-banner{
    background:var(--error-soft);
    border:1px solid var(--error);
    color:var(--error);
    font-size:13px;
    border-radius:10px;
    padding:10px 12px;
    line-height:1.4;
    display:none;
  }
  .error-banner.show{display:block;}

  .privacy-note{
    font-size:11px;
    color:var(--muted);
    display:flex;
    gap:8px;
    align-items:flex-start;
    line-height:1.4;
    border-top:1px solid var(--line);
    padding-top:10px;
    margin-top:auto;
  }
  .settings-note{
    font-size:10px;
    color:var(--muted);
    line-height:1.35;
  }

  .help{
    font-size:11px;
    color:var(--ink-soft);
    line-height:1.4;
    background:var(--accent-soft);
    border-left:3px solid var(--accent);
    padding:8px 10px;
    border-radius:0 10px 10px 0;
  }
  .help b{color:var(--accent-text);}

  /* ---------- Main / preview ---------- */
  main{
    padding:24px 32px 32px;
    overflow-y:auto;
    overflow-x:hidden;
  }
  .main-header{
    display:flex;
    justify-content:space-between;
    align-items:flex-end;
    gap:16px;
    margin-bottom:26px;
    flex-wrap:wrap;
  }
  .main-header h2{font-size:20px;}
  .main-header .sub{font-size:13px; color:var(--muted); margin-top:4px;}

  .empty-state{
    position:relative;
    overflow:hidden;
    border:2px dashed var(--line);
    border-radius:18px;
    padding:44px 30px;
    text-align:center;
    color:var(--muted);
    background:var(--bg-elevated);
  }
  .empty-state::before, .empty-state::after{
    content:'';
    position:absolute;
    border-radius:6px;
    opacity:0.8;
    pointer-events:none;
  }
  .empty-state::before{ width:16px; height:16px; background:var(--yellow); top:22px; left:28px; transform:rotate(18deg); }
  .empty-state::after{ width:14px; height:14px; background:var(--accent); bottom:24px; right:32px; border-radius:50%; }
  .empty-state .icon{font-size:40px; margin-bottom:14px; display:block;}
  .empty-state h3{color:var(--ink); font-size:17px; margin-bottom:6px;}
  .empty-state p{font-size:13px; max-width:340px; margin:0 auto;}

  .script-accent{
    font-family:'Caveat',cursive;
    font-weight:700;
    font-size:22px;
    color:var(--accent);
    display:block;
  }
  .empty-state .script-accent{ margin-bottom:4px; }
  .practice-score .script-accent{ display:block; font-size:20px; margin-top:4px; color:var(--terracotta); }

  .preview{
    display:flex;
    flex-wrap:wrap;
    gap:28px;
    align-items:flex-start;
  }

  .ad-slot{
    position:sticky;
    top:0;
    z-index:10;
    margin-bottom:24px;
    min-height:90px;
    border:1px dashed var(--line);
    border-radius:10px;
    display:flex;
    align-items:center;
    justify-content:center;
    background:var(--bg-elevated);
    box-shadow:0 4px 14px rgba(0,0,0,0.35);
    overflow:hidden;
  }
  .ad-slot-label{
    font-family:'IBM Plex Mono',monospace;
    font-size:11px;
    letter-spacing:0.08em;
    text-transform:uppercase;
    color:var(--muted);
  }
  .ad-slot .adsbygoogle{
    position:absolute;
    inset:0;
  }
  .site-footer{
    margin-top:24px;
    text-align:center;
  }
  .footer-link{
    background:none;
    border:none;
    color:var(--muted);
    font-size:12px;
    text-decoration:underline;
    cursor:pointer;
    padding:6px;
  }
  .footer-link:hover{ color:var(--ink); }

  .modal-overlay{
    position:fixed; inset:0;
    background:rgba(5,6,12,0.7);
    display:flex; align-items:center; justify-content:center;
    z-index:1000;
    padding:20px;
  }
  .modal-box{
    background:var(--bg-elevated);
    border:1px solid var(--line);
    border-radius:16px;
    max-width:520px;
    width:100%;
    max-height:80vh;
    overflow-y:auto;
    padding:28px;
    position:relative;
    font-size:13px;
    line-height:1.6;
    color:var(--ink);
  }
  .modal-box h2{ margin-bottom:14px; font-size:19px; }
  .modal-box p{ margin-bottom:12px; }

  /* ---------- Oefenmodus ---------- */
  .practice-overlay{
    position:fixed; inset:0;
    background:rgba(5,6,12,0.75);
    display:flex; align-items:center; justify-content:center;
    z-index:1100;
    padding:16px;
  }
  .practice-box{
    background:var(--bg-elevated);
    border:1px solid var(--line);
    border-radius:20px;
    max-width:560px;
    width:100%;
    max-height:92vh;
    overflow-y:auto;
    padding:28px;
    position:relative;
  }
  @media (max-width:600px){
    .practice-box{ max-height:100vh; height:100%; border-radius:0; padding:20px; }
  }
  .practice-panel h2{ font-size:20px; margin-bottom:18px; color:var(--ink); }

  .mode-choice-group{ display:flex; flex-direction:column; gap:8px; }
  .mode-choice{
    display:flex; align-items:center; gap:10px;
    border:1px solid var(--line);
    border-radius:10px;
    padding:12px;
    cursor:pointer;
    font-family:'Baloo 2',sans-serif;
    font-size:14px;
    font-weight:600;
    color:var(--ink);
    transition:border-color .15s ease, background .15s ease;
  }
  .mode-choice:has(input:checked), .mode-choice.selected{
    border-color:var(--terracotta);
    background:var(--terracotta-soft);
  }
  .mode-choice input{ accent-color:var(--terracotta); }
  .mode-choice.disabled{ opacity:0.4; cursor:not-allowed; }
  #practiceSubsetCount{
    border:1px solid var(--line); border-radius:8px; padding:4px 8px;
    background:var(--tint); color:var(--ink);
    font-family:'Inter',sans-serif; font-size:13px; margin:0 4px;
  }

  .practice-progress{ margin-bottom:20px; }
  .practice-progress span{
    font-family:'IBM Plex Mono',monospace; font-size:12px; color:var(--muted);
  }
  .practice-progress-bar{
    height:8px; background:var(--tint); border-radius:4px; margin-top:6px; overflow:hidden;
  }
  .practice-progress-fill{
    height:100%;
    background:linear-gradient(90deg, var(--terracotta), var(--accent));
    border-radius:4px; transition:width .2s ease; width:0%;
  }

  .practice-instruction{
    font-family:'Baloo 2',sans-serif;
    font-weight:700; font-size:17px; color:var(--ink);
    margin-bottom:22px;
  }

  .practice-card-wrap{ position:relative; margin-bottom:24px; }
  .practice-card-wrap::before, .practice-card-wrap::after{
    content:''; position:absolute; left:50%; transform:translateX(-50%);
    border:1px solid var(--line); border-radius:18px; background:var(--bg-elevated);
  }
  .practice-card-wrap::before{ width:86%; height:14px; top:-18px; border-color:var(--line); opacity:0.5; }
  .practice-card-wrap::after{ width:93%; height:14px; top:-9px; border-color:var(--line); opacity:0.75; }
  .practice-card{
    position:relative; z-index:1;
    background:var(--bg-elevated);
    border:1px solid var(--line);
    border-radius:18px;
    min-height:200px;
    display:flex; align-items:center; justify-content:center;
    padding:28px;
    text-align:center;
    box-shadow:0 6px 20px rgba(0,0,0,0.35);
  }
  .practice-term{
    font-family:'Baloo 2',sans-serif;
    font-weight:700; font-size:28px; color:var(--ink);
  }

  .practice-input-area{ margin-bottom:16px; }
  .practice-type-input{
    width:100%; padding:12px; font-size:15px;
    border:1px solid var(--line); border-radius:10px;
    background:var(--tint); color:var(--ink);
    font-family:'Inter',sans-serif;
  }
  .practice-mic-btn{
    width:100%; padding:22px; border-radius:16px; border:none;
    background:var(--terracotta); color:var(--white); font-weight:700; font-size:16px;
    cursor:pointer; display:flex; align-items:center; justify-content:center; gap:10px;
    box-shadow:0 3px 0 0 #1E3A8A;
    transition:transform .05s ease, box-shadow .05s ease, background .15s ease;
  }
  .practice-mic-btn:active{ transform:translateY(3px); box-shadow:0 0 0 0 #1E3A8A; }
  .practice-mic-btn.listening{ background:var(--accent); box-shadow:0 3px 0 0 #9F1239; }
  .practice-heard{ margin-top:10px; font-size:13px; color:var(--muted); text-align:center; }
  .speech-verdict{
    display:inline-flex;
    align-items:center;
    gap:6px;
    margin-top:8px;
    font-size:13px;
    font-weight:600;
    padding:6px 12px;
    border-radius:999px;
  }
  .speech-verdict.correct{ background:var(--success-soft); color:var(--success); }
  .speech-verdict.incorrect{ background:var(--error-soft); color:var(--error); }
  .practice-switch-link{
    display:block; text-align:center; margin-top:12px;
    font-family:'IBM Plex Mono',monospace; font-size:11px; letter-spacing:0.06em;
    text-transform:uppercase; color:var(--muted); background:none; border:none;
    cursor:pointer; text-decoration:underline; width:100%;
  }
  .practice-switch-link:hover{ color:var(--ink); }

  .practice-answer-area{ border-top:1px solid var(--line); padding-top:16px; }
  .practice-answer-label{
    font-family:'IBM Plex Mono',monospace; font-size:11px; text-transform:uppercase;
    letter-spacing:0.06em; color:var(--muted); margin-bottom:6px;
  }
  .practice-answer-text{
    font-family:'Baloo 2',sans-serif; font-weight:700; font-size:20px; color:var(--ink); margin-bottom:16px;
  }
  .practice-selfreport{ display:flex; gap:10px; }
  .practice-selfreport .btn{ flex:1; }

  .practice-score{
    font-family:'Baloo 2',sans-serif; font-size:28px; font-weight:700;
    color:var(--ink); text-align:center; margin-bottom:20px;
  }
  .practice-missed-list{ margin-bottom:20px; max-height:220px; overflow-y:auto; }
  .practice-missed-item{
    display:flex; justify-content:space-between; gap:10px;
    padding:8px 0; border-bottom:1px solid var(--line);
    font-size:13px; color:var(--ink);
  }
  .practice-results-actions{ display:flex; flex-direction:column; gap:10px; }
  .modal-close{
    position:absolute; top:14px; right:14px;
    background:none; border:none;
    font-size:22px; line-height:1; cursor:pointer;
    color:var(--muted);
  }
  .modal-close:hover{ color:var(--ink); }

  .sheet-wrap{
    width:210mm;
    transform-origin:top left;
    transform:scale(0.42);
    margin-bottom: calc(-297mm * 0.58);
    margin-right: calc(-210mm * 0.58);
  }
  @media (max-width:860px){
    .sheet-wrap{transform:scale(0.32); margin-bottom:calc(-297mm * 0.68); margin-right:calc(-210mm * 0.68);}
  }

  .sheet{
    width:210mm;
    height:297mm;
    background:var(--white);
    box-shadow:0 6px 24px rgba(0,0,0,0.4);
    display:flex;
    flex-direction:column;
    padding:12mm;
  }
  body.landscape .sheet{
    width:297mm;
    height:210mm;
  }
  body.landscape .sheet-wrap{
    margin-bottom: calc(-210mm * 0.58);
    margin-right: calc(-297mm * 0.58);
  }
  @media (max-width:860px){
    body.landscape .sheet-wrap{transform:scale(0.32); margin-bottom:calc(-210mm * 0.68); margin-right:calc(-297mm * 0.68);}
  }
  .sheet-caption{
    height:8mm;
    flex:0 0 8mm;
    display:flex;
    align-items:center;
    justify-content:space-between;
    font-family:'IBM Plex Mono',monospace;
    font-size:3mm;
    color:#93A5B8;
    letter-spacing:0.04em;
    text-transform:uppercase;
  }
  .card-grid{
    flex:1;
    display:grid;
  }
  .card{
    border:1px dashed #C7CFDB;
    display:flex;
    align-items:center;
    justify-content:center;
    text-align:center;
    padding:5mm;
    overflow:hidden;
    font-weight:600;
    color:var(--paper-ink);
    word-break:break-word;
    transition:border-color .1s ease;
  }
  .card-grid[data-count="2"] .card{padding:6mm;}
  .card-grid[data-count="6"] .card{padding:4.5mm;}
  .card-grid[data-count="8"] .card{padding:4mm;}
  .card-grid[data-count="10"] .card{padding:3mm;}
  .card-grid[data-count="12"] .card{padding:2.5mm;}
  body.hide-cutlines .card{border-color:transparent;}

  .side-front .fs1{font-size:calc(var(--fs-base-front) * 1.29 * 1pt); line-height:1.15;}
  .side-front .fs2{font-size:calc(var(--fs-base-front) * 1 * 1pt); line-height:1.2;}
  .side-front .fs3{font-size:calc(var(--fs-base-front) * 0.75 * 1pt); line-height:1.25; font-weight:500;}
  .side-front .fs4{font-size:calc(var(--fs-base-front) * 0.55 * 1pt); line-height:1.3; font-weight:400;}
  .side-back .fs1{font-size:calc(var(--fs-base-back) * 1.29 * 1pt); line-height:1.15;}
  .side-back .fs2{font-size:calc(var(--fs-base-back) * 1 * 1pt); line-height:1.2;}
  .side-back .fs3{font-size:calc(var(--fs-base-back) * 0.75 * 1pt); line-height:1.25; font-weight:500;}
  .side-back .fs4{font-size:calc(var(--fs-base-back) * 0.55 * 1pt); line-height:1.3; font-weight:400;}

  /* ---------- Print ---------- */
  @media print{
    html, body{height:auto; overflow:visible;}
    body{background:#fff;}
    .sidebar, .main-header, .no-print{display:none !important;}
    .app{height:auto;}
    main{padding:0; margin:0; height:auto; overflow:visible;}
    .preview{display:block; gap:0;}
    .sheet-wrap{
      width:auto; transform:none !important; margin:0 !important;
      page-break-after:always;
    }
    .sheet-wrap:last-child{ page-break-after:auto; }
    .sheet{box-shadow:none; width:210mm; height:297mm;}
    body.landscape .sheet{width:297mm; height:210mm;}
  }