:root{
    --bg:#FAF7F1;
    --paper:#FFFFFF;
    --ink:#2E2318;
    --ink-soft:#6B5D4F;
    --line:#E7DFD2;
    --amber:#C97A2B;
    --amber-light:#F3E2CC;
    --amber-deep:#8A5217;
    --teal:#2F6F62;
    --teal-light:#DCEBE6;
    --teal-deep:#1E4A40;
    --danger:#B23A3A;
    --danger-light:#F6DEDE;
    --radius:16px;
    --shadow:0 1px 2px rgba(46,35,24,0.06), 0 4px 14px rgba(46,35,24,0.06);
  }
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{
    background:var(--bg);
    color:var(--ink);
    font-family:'Inter',sans-serif;
    font-size:17px;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
    min-height:100vh;
  }
  h1,h2,h3{font-family:'Fraunces',serif;font-weight:600;margin:0;}
  #app{max-width:960px;margin:0 auto;padding:0 0 80px;}
  button{font-family:inherit;font-size:inherit;cursor:pointer;}
  input,textarea,select{font-family:inherit;font-size:inherit;}
  a{color:inherit;}

  .topbar{
    display:flex;align-items:center;justify-content:space-between;
    padding:18px 20px;background:var(--paper);border-bottom:1px solid var(--line);
    position:sticky;top:0;z-index:20;
  }
  .brand{display:flex;align-items:center;gap:10px;}
  .brand-mark{
    width:38px;height:38px;border-radius:10px;background:var(--amber);
    display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;flex-shrink:0;
  }
  .brand-text h1{font-size:19px;}
  .brand-text span{font-size:13px;color:var(--ink-soft);}
  .logout-btn{
    background:none;border:1px solid var(--line);border-radius:10px;
    padding:8px 14px;color:var(--ink-soft);font-size:14px;
  }
  .logout-btn:hover{border-color:var(--ink-soft);}

  .page{padding:20px;}

  .login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;}
  .login-card{background:var(--paper);border-radius:20px;box-shadow:var(--shadow);padding:36px 28px;max-width:420px;width:100%;text-align:center;}
  .login-mark{width:64px;height:64px;border-radius:16px;background:var(--amber);display:flex;align-items:center;justify-content:center;color:#fff;font-size:32px;margin:0 auto 18px;}
  .login-card h1{font-size:24px;margin-bottom:6px;}
  .login-card p.sub{color:var(--ink-soft);font-size:15px;margin:0 0 28px;}
  .role-btn{display:block;width:100%;padding:16px;border-radius:14px;border:1px solid var(--line);background:var(--paper);margin-bottom:12px;text-align:left;display:flex;align-items:center;gap:14px;}
  .role-btn .icon{width:42px;height:42px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;color:#fff;flex-shrink:0;}
  .role-btn.teacher .icon{background:var(--amber);}
  .role-btn.student .icon{background:var(--teal);}
  .role-btn .label-title{font-weight:600;font-size:16px;}
  .role-btn .label-sub{font-size:13px;color:var(--ink-soft);}
  .role-btn:hover{border-color:var(--ink-soft);}
  .student-picker{margin-top:8px;text-align:left;}
  .student-picker label{font-size:13px;color:var(--ink-soft);display:block;margin-bottom:6px;}
  select.big-select{width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:var(--paper);font-size:16px;margin-bottom:12px;}
  .demo-note{font-size:12px;color:var(--ink-soft);margin-top:18px;line-height:1.6;}

  .section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:10px;}
  .section-head h2{font-size:21px;}
  .btn{border-radius:12px;border:none;padding:11px 18px;font-weight:600;font-size:14.5px;display:inline-flex;align-items:center;gap:6px;}
  .btn-amber{background:var(--amber);color:#fff;}
  .btn-amber:hover{background:var(--amber-deep);}
  .btn-outline{background:var(--paper);border:1px solid var(--line);color:var(--ink);}
  .btn-outline:hover{border-color:var(--ink-soft);}
  .btn-danger{background:var(--danger-light);color:var(--danger);}
  .btn-danger:hover{background:#EFC7C7;}
  .btn-teal{background:var(--teal);color:#fff;}
  .btn-teal:hover{background:var(--teal-deep);}
  .btn-sm{padding:8px 12px;font-size:13.5px;border-radius:10px;}

  .qn-strip{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:18px;}
  .qn-pill{background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:5px 12px;font-size:12.5px;color:var(--ink-soft);}
  .qn-pill:hover{border-color:var(--ink-soft);color:var(--ink);}

  .list-toolbar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:18px;}
  .sort-toggle{display:inline-flex;border:1px solid var(--line);border-radius:12px;overflow:hidden;}
  .sort-btn{padding:8px 14px;font-size:13.5px;background:var(--paper);border:none;color:var(--ink-soft);}
  .sort-btn.active{background:var(--amber);color:#fff;font-weight:600;}
  .sort-btn:not(.active):hover{background:var(--bg);}

  .student-cards{display:flex;flex-direction:column;gap:14px;}
  .student-card{background:var(--paper);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 18px 16px;scroll-margin-top:80px;}
  .student-card .name-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
  .name-link{font-family:'Fraunces',serif;font-size:19px;font-weight:600;background:none;border:none;padding:0;color:var(--ink);text-align:left;}
  .name-link:hover{color:var(--amber-deep);text-decoration:underline;}
  .field-grid{display:grid;grid-template-columns:1fr;gap:10px;}
  .field{border-top:1px solid var(--line);padding-top:10px;}
  .field-label{font-size:12px;color:var(--ink-soft);margin-bottom:4px;display:flex;align-items:center;gap:5px;}
  .editable{border:1px solid transparent;border-radius:8px;padding:6px 8px;margin:-6px -8px;min-height:1.4em;white-space:pre-wrap;word-break:break-word;}
  .editable:hover{border-color:var(--line);background:var(--bg);}
  .editable:focus{outline:none;border-color:var(--amber);background:#fff;}

  .modal-overlay{position:fixed;inset:0;background:rgba(46,35,24,0.45);display:flex;align-items:flex-end;justify-content:center;z-index:100;}
  @media(min-width:640px){.modal-overlay{align-items:center;}}
  .modal{background:var(--paper);border-radius:20px 20px 0 0;padding:24px 22px 26px;max-width:480px;width:100%;max-height:88vh;overflow-y:auto;}
  @media(min-width:640px){.modal{border-radius:20px;}}
  .modal h2{font-size:20px;margin-bottom:18px;}
  .form-row{margin-bottom:16px;}
  .form-row label{display:block;font-size:13.5px;color:var(--ink-soft);margin-bottom:6px;font-weight:500;}
  .form-row input, .form-row textarea{width:100%;padding:12px 13px;border-radius:10px;border:1px solid var(--line);background:var(--bg);}
  .form-row textarea{resize:vertical;min-height:56px;}
  .form-actions{display:flex;gap:10px;margin-top:20px;}
  .form-actions .btn{flex:1;justify-content:center;}
  .error-text{color:var(--danger);font-size:13px;margin-top:6px;}

  .back-link{display:inline-flex;align-items:center;gap:6px;color:var(--ink-soft);background:none;border:none;font-size:14px;margin-bottom:14px;padding:0;}
  .karte-name{font-size:24px;margin-bottom:6px;display:flex;align-items:center;gap:8px;}
  .furigana-row{margin:0 0 18px;}
  .furigana-row label{font-size:12px;color:var(--ink-soft);display:block;margin-bottom:3px;}
  .karte-card{background:var(--paper);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line);padding:20px;margin-bottom:16px;}
  .karte-card.goal{background:linear-gradient(180deg,var(--amber-light),var(--paper) 70%);}
  .karte-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;}
  .karte-label{font-size:13px;font-weight:600;color:var(--amber-deep);display:flex;align-items:center;gap:6px;}
  .karte-label.teal{color:var(--teal-deep);}
  .karte-body{font-size:18px;line-height:1.65;}
  .task-list{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px;}
  .task-chip{background:var(--teal-light);color:var(--teal-deep);border-radius:20px;padding:8px 14px;font-size:14.5px;font-weight:500;display:flex;align-items:center;gap:6px;}
  .task-chip button{background:none;border:none;color:var(--teal-deep);opacity:0.6;font-size:14px;padding:0;line-height:1;}

  .wanto-list{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:10px;}
  .wanto-chip{position:relative;border:1.5px solid #3E6FE0;background:#EEF3FD;color:var(--ink);border-radius:10px;padding:10px 28px 10px 13px;font-size:14.5px;font-weight:500;max-width:100%;word-break:break-word;}
  .wanto-chip button{position:absolute;top:3px;right:3px;width:18px;height:18px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:none;border:none;color:#3E6FE0;font-size:13px;line-height:1;opacity:0.7;padding:0;}
  .wanto-chip button:hover{opacity:1;background:rgba(62,111,224,0.14);}
  .add-task-row{display:flex;gap:8px;margin-top:10px;}
  .add-task-row input{flex:1;padding:9px 12px;border-radius:10px;border:1px solid var(--line);}

  .achievement{border-top:1px solid var(--line);padding-top:14px;margin-top:14px;}
  .achievement:first-of-type{border-top:none;padding-top:0;margin-top:0;}
  .ach-title{font-size:17px;font-weight:600;display:flex;align-items:center;gap:8px;}
  .ach-date{font-size:13px;color:var(--ink-soft);margin:3px 0 10px;}
  .video-wrap{position:relative;width:100%;padding-top:56.25%;border-radius:12px;overflow:hidden;background:#000;}
  .video-wrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0;}
  .ach-actions{display:flex;gap:8px;margin-top:10px;}
  .empty-state{color:var(--ink-soft);font-size:15px;padding:8px 0;}

  .icon-btn{background:none;border:none;color:var(--ink-soft);padding:4px;border-radius:8px;font-size:16px;display:inline-flex;align-items:center;justify-content:center;}
  .icon-btn:hover{background:var(--bg);color:var(--ink);}
  .icon-btn.danger:hover{background:var(--danger-light);color:var(--danger);}

  .cf-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:10px;margin-bottom:10px;}
  .cf-row input[type=text]{flex:1;min-width:140px;padding:8px 10px;border-radius:8px;border:1px solid var(--line);background:var(--bg);}
  .cf-row select{padding:8px 10px;border-radius:8px;border:1px solid var(--line);background:var(--bg);}
  .cf-student-edit{font-size:12.5px;color:var(--ink-soft);display:flex;align-items:center;gap:5px;white-space:nowrap;}

  .save-toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:10px 18px;border-radius:30px;font-size:14px;opacity:0;transition:opacity .25s ease, transform .25s ease;pointer-events:none;z-index:200;}
  .save-toast.show{opacity:1;transform:translateX(-50%) translateY(-6px);}

  @media(max-width:480px){
    .page{padding:16px;}
    .login-card{padding:28px 20px;}
  }