*{box-sizing:border-box;margin:0;padding:0}
    :root{--line:#cfd4da;--soft:#f4f5ef;--panel:#fff;--text:#111;--muted:#5b6572;--nav:#f8f8f8;--blue:#1d6fd8;--danger:#cf463f}
    html,body{height:100%}
    body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;background:#fff;color:var(--text);overflow:hidden}
    .hidden{display:none!important}
    .loading-screen,.start-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:#f6f7fb}
    .loading-content,.start-content{width:min(560px,100%);text-align:center;background:#fff;border:1px solid #d8dde7;border-radius:24px;padding:32px;box-shadow:0 20px 40px rgba(15,23,42,.08)}
    .spinner{width:58px;height:58px;margin:0 auto 20px;border:4px solid #dbe3ef;border-top-color:#1f5ea6;border-radius:50%;animation:spin 1s linear infinite}
    @keyframes spin{to{transform:rotate(360deg)}}
    .loading-title,.start-title{font-size:1.45rem;font-weight:700;margin-bottom:10px}
    .loading-subtitle,.start-subtitle{font-size:1rem;color:#64748b}
    .start-button,.modal-btn{appearance:none;border:1px solid #1f5ea6;border-radius:14px;background:linear-gradient(135deg,#2f79c8,#1f5ea6);color:#fff;padding:14px 22px;font-size:1rem;font-weight:700;cursor:pointer}
    .start-actions{margin-top:24px}
    .exam-shell{height:100vh;display:flex;flex-direction:column;background:#fff;position:relative;z-index:1}
    .exam-shell>header{background-color:#fff;color:#333;padding:8px 20px;display:flex;justify-content:space-between;align-items:center;z-index:100;box-shadow:0 1px 3px rgba(0,0,0,.1);flex-shrink:0;border-bottom:1px solid #e2e8f0;gap:10px}
    .brand{display:flex;align-items:center;gap:8px;font-weight:700;color:#2d3748;cursor:pointer}
    .brand img{width:28px;height:28px;object-fit:contain;border-radius:4px}
    .passage-info{font-size:.9rem;font-weight:500;color:#2d3748}
    .header-right{display:flex;align-items:center;gap:8px}
    .header-menu-link{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 16px;border-radius:999px;border:1px solid rgba(255,255,255,.28);background:linear-gradient(135deg,#7f1d1d 0%,#b91c1c 48%,#ef4444 100%);box-shadow:0 14px 28px rgba(185,28,28,.22);color:#fff7f7;text-decoration:none;font-size:.92rem;font-weight:700;letter-spacing:.01em;white-space:nowrap;transition:transform .18s ease,box-shadow .18s ease,filter .18s ease}
    .header-menu-link:hover{transform:translateY(-1px);box-shadow:0 18px 34px rgba(185,28,28,.28);filter:saturate(1.08) brightness(1.03)}
    .timer{background-color:rgba(255,193,193,.5);padding:6px 12px;border-radius:4px;display:flex;align-items:center;gap:6px;transition:all .3s;min-width:80px;justify-content:center;text-align:center;font-size:.9rem;color:#c53030;border:1px solid rgba(255,120,120,.3);font-weight:600;font-variant-numeric:tabular-nums}
    .timer.warning{color:#9b2c2c;background-color:rgba(254,178,178,.7);border-color:rgba(245,101,101,.5)}
    .logo-area{display:flex;justify-content:center;align-items:center;gap:8px;padding:8px 16px;background-color:#007bff;color:#fff;text-decoration:none;border-radius:20px;font-size:.9rem;font-weight:500;transition:all .3s ease;box-shadow:0 2px 4px rgba(0,123,255,.3);cursor:pointer;border:none;font:inherit}
    .logo-area:hover{background-color:#0056b3;transform:translateY(-1px);box-shadow:0 4px 8px rgba(0,123,255,.4)}
    .logo-area i{font-size:1.1rem}
    .menu-button{width:36px;height:32px;border:1px solid #cbd5e0;border-radius:6px;background:#f7fafc;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .2s,transform .1s}
    .menu-button:hover{background:#edf2f7}
    .menu-button:active{transform:scale(.97)}
    .menu-icon{width:16px;height:12px;display:grid;row-gap:3px}
    .menu-icon span{display:block;height:2px;background:#2d3748;border-radius:2px}
    .icon-button{width:38px;height:32px;border:1px solid #cbd5e0;border-radius:6px;background:#f7fafc;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .2s,transform .1s;color:#2d3748;font-size:16px}
    .icon-button:hover{background:#edf2f7}
    .icon-button:active{transform:scale(.97)}
    .writing-task-strip{flex-shrink:0;display:flex;align-items:flex-start;gap:20px;padding:12px 20px;border-bottom:1px solid #ccc;background:#f0f0f0}
    .writing-task-strip-title{font-size:1rem;font-weight:700;color:#111;flex-shrink:0}
    .writing-task-strip-sub{flex:1;min-width:0;font-size:.94rem;line-height:1.4;color:#222}
    .review-banner{margin:0;padding:10px 20px;border-bottom:1px solid #cfe4d7;background:#eefcf4;color:#15543d;font-size:.9rem}
    .workspace{flex:1;display:flex;min-height:0;padding:0;background:#fff}
    .prompt-panel,.editor-panel{position:relative;min-height:0}
    .prompt-panel{width:50%;padding:24px 20px 24px 24px;overflow:auto;display:flex;flex-direction:column;align-items:stretch}.prompt-panel.task1-mode{overflow:hidden}
    .prompt-frame{width:100%;height:100%;border:none;background:transparent;box-sizing:border-box;display:flex;flex-direction:column}
    .prompt-frame .prompt-body{padding:0;flex:1;min-height:0}
    .editor-panel{flex:1;min-width:0;padding:24px 24px 24px 20px;overflow:hidden;display:flex;flex-direction:column}
    .resize-handle{flex:0 0 16px;position:relative;cursor:col-resize;z-index:5;border-left:1px solid #ccc;border-right:1px solid #ccc;background:#fff}
    .resize-handle::before{content:"\2194";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:26px;height:26px;border:1px solid #999;background:#fff;display:flex;align-items:center;justify-content:center;font-size:.8rem;line-height:1;color:#333}
    .prompt-body{padding:0;font-size:1rem;line-height:1.5;box-sizing:border-box}.prompt-body.task1-mode{height:100%;display:flex;flex-direction:column;min-height:0}
    .prompt-body p{margin-bottom:22px}
    .prompt-body strong{font-size:1.02rem}
    .prompt-body p.prompt-topic-lead{margin:0 0 14px;font-weight:700}
    .prompt-topic-lead strong{font-weight:700}
    .prompt-topic-statements p{font-weight:700;font-style:italic;margin:0 0 14px;line-height:1.45}
    .prompt-topic-statements p:last-child{margin-bottom:0}
    .prompt-topic-statements{margin:0 0 20px}
    .prompt-body p.prompt-topic-foot{margin:0;font-weight:400;font-style:normal;line-height:1.5}
    .task1-intro{border:1px solid #111;background:#fff;padding:18px 20px;box-sizing:border-box;width:100%;max-width:100%;margin:0 0 18px}
    .task1-intro p{margin:0 0 14px;line-height:1.45;font-size:1rem}
    .task1-intro p:last-of-type{margin-bottom:0}
    .task1-intro strong{font-weight:700}
    .task2-prompt-frame{border:none;background:transparent;padding:0;box-sizing:border-box;width:100%}
    .task2-topic-table{width:100%;border-collapse:collapse;margin:0 0 18px;background:#ececec;border:1px solid #111}
    .task2-topic-table td{padding:14px 16px}
    .task2-topic-table p{margin:0 0 12px;line-height:1.45}
    .task2-topic-table p:last-child{margin-bottom:0}
    .task1-chart{width:100%;max-width:none;margin-top:0;padding:12px 0 18px;display:flex;align-items:flex-start;justify-content:center;flex:1;min-height:0}
    .task1-chart img{display:block;width:100%!important;max-width:100%;max-height:100%;height:auto!important;object-fit:contain;object-position:top center}
    .chart-title{font-size:.9rem;font-weight:700;text-align:center;margin-bottom:18px}
    .chart-grid{display:grid;gap:12px}
    .chart-row{display:grid;grid-template-columns:90px 1fr auto;align-items:center;gap:12px}
    .chart-track{height:18px;background:#eee;border:1px solid #c9c9c9;position:relative}
    .chart-fill-dark,.chart-fill-light{height:100%;position:absolute;top:0}
    .chart-fill-dark{left:0;background:#444}
    .chart-fill-light{left:0;top:20px}
    .chart-fill-light-inline{height:100%;background:#b7b7b7}
    .editor-wrap{flex:1;display:flex;flex-direction:column;min-height:0;gap:0;position:relative;padding-bottom:8px}
    .editor-box{flex:1;width:100%;min-height:220px;border:1px solid #000;background:#fff;padding:14px 16px;resize:none;font:inherit;font-size:1rem;line-height:1.5;display:block}
    .editor-box[readonly]{background:#fafafa}
    .word-counter{width:100%;text-align:right;padding:8px 2px 0;font-size:.95rem;color:#333}
    .bottom-bar{flex-shrink:0;min-height:48px;border-top:0;border-bottom:0;width:100%;padding:0;display:grid;grid-template-columns:1fr 1fr 56px;align-items:stretch;position:sticky;bottom:0;z-index:25;background:#fff;box-shadow:none;outline:0}
    .bottom-cell{appearance:none;border:none;cursor:pointer;font:inherit;color:#111;margin:0;border-radius:0;display:flex;align-items:center;gap:10px;text-align:left;box-sizing:border-box}
    .bottom-cell--p1{background:#fff;padding:12px 18px;justify-content:center}
    .bottom-cell--p1 .bottom-tab__title{font-weight:700;font-size:1rem;color:#111}
    .bottom-cell--p1.is-active{background:#fff}
    .bottom-cell--p2{background:#fff;padding:12px 18px;justify-content:center}
    .bottom-cell--p2 .bottom-tab__title{font-weight:700;font-size:1rem;color:#111}
    .bottom-cell--p2 .bottom-tab__count{color:#666}
    .bottom-cell--p2.is-active{background:#fff}
    .bottom-tab__count{font-weight:400;font-size:.86rem;color:#888}
    .bottom-cell--submit{background:#fff;border-left:0;padding:8px;justify-content:center;font-size:1.35rem;font-weight:700;color:#1a1a1a;transition:color .15s,background .15s}
    .bottom-cell--submit:hover{background:#fff;color:#000}
    .bottom-cell--submit.is-ready{color:#0f5132}
    .submit-modal{position:fixed;inset:0;z-index:1100;display:none;align-items:center;justify-content:center;padding:24px;background:rgba(15,23,42,.45)}
    .submit-modal.is-open{display:flex}
    .submit-card{width:min(520px,100%);border-radius:20px;border:1px solid #d8dde7;background:#fff;padding:24px}
    .submit-card h2{font-size:1.35rem;margin-bottom:10px}
    .submit-card p{color:#64748b}
    .submit-meta{margin:18px 0;display:grid;gap:10px}
    .submit-meta-row{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-radius:12px;background:#f8fafc;border:1px solid #e2e8f0}
    .submit-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}
    .cancel-btn{appearance:none;border:1px solid #cbd5e1;border-radius:12px;background:#fff;color:#1f2937;padding:12px 18px;font-size:.95rem;font-weight:700;cursor:pointer}
    .modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,.6);z-index:1000;align-items:center;justify-content:center}
    .options-modal{background:rgba(0,0,0,.35)}
    .options-modal .modal-content{max-width:640px;width:92%;text-align:left;padding:26px;box-shadow:0 10px 30px rgba(0,0,0,.2);background:#fff;color:#1a202c;border-radius:0}
    .options-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
    .options-title{font-size:1.2rem;font-weight:700;color:#1a202c;flex:1;text-align:center}
    .close-btn{border:none;background:transparent;font-size:1.2rem;cursor:pointer;color:#2d3748}
    .options-list{border:1px solid #e2e8f0;border-radius:10px;overflow:hidden}
    .option-row{padding:16px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #e2e8f0;cursor:pointer;background:#fff}
    .option-row:last-child{border-bottom:none}
    .option-label{font-weight:800;color:#2d3748;font-size:1.08rem}
    .option-sub{font-weight:700;color:#4a5568;margin-left:10px;font-size:1.02rem}
    .submenu button{width:100%;text-align:left;padding:16px 18px;border:none;background:#fff;border-bottom:1px solid #e2e8f0;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:1.05rem;font-weight:700}
    .submenu button:last-child{border-bottom:none}
    .submenu button:hover{background:#f7fafc}
    .submenu .selected>.checkmark::before{content:"\2713";font-weight:800}
    .contrast-white-black,.contrast-white-black p,.contrast-white-black .passage-info,.contrast-white-black .option-label,.contrast-white-black .option-sub,.contrast-white-black .options-title,.contrast-white-black .writing-task-strip,.contrast-white-black .writing-task-strip-title,.contrast-white-black .writing-task-strip-sub,.contrast-white-black .word-counter,.contrast-white-black .bottom-cell .bottom-tab__title,.contrast-white-black .bottom-cell .bottom-tab__count{color:#f7fafc!important}
    .contrast-yellow-black,.contrast-yellow-black p,.contrast-yellow-black .passage-info,.contrast-yellow-black .option-label,.contrast-yellow-black .option-sub,.contrast-yellow-black .options-title,.contrast-yellow-black .writing-task-strip,.contrast-yellow-black .writing-task-strip-title,.contrast-yellow-black .writing-task-strip-sub,.contrast-yellow-black .word-counter,.contrast-yellow-black .bottom-cell .bottom-tab__title,.contrast-yellow-black .bottom-cell .bottom-tab__count{color:#f6e05e!important}
    .contrast-white-black a{color:#90cdf4!important}
    .contrast-yellow-black a{color:#f6e05e!important;text-decoration:underline}
    .contrast-white-black .review-banner{background:#14532d!important;color:#bbf7d0!important;border-color:#166534!important}
    .contrast-yellow-black .review-banner{background:#422006!important;color:#fde68a!important;border-color:#92400e!important}
    .contrast-white-black .exam-shell,.contrast-white-black .workspace,.contrast-white-black .prompt-panel,.contrast-white-black .editor-panel,.contrast-white-black .writing-task-strip,.contrast-white-black .bottom-bar{background:rgba(17,17,17,.94)!important;color:#fff!important}
    .contrast-white-black .prompt-frame{background:transparent!important}
    .contrast-white-black .task1-intro,.contrast-white-black .task2-prompt-frame{background:rgba(17,17,17,.94)!important;color:#fff!important;border-color:#f7fafc!important}
    .contrast-white-black .editor-box,.contrast-white-black textarea{background:#0f1012!important;color:#f7fafc!important;border-color:#4a5568!important}
    .contrast-white-black .resize-handle{background:#111!important;border-color:#4a5568!important}
    .contrast-white-black .resize-handle::before{background:#1a202c!important;border-color:#718096!important;color:#f7fafc!important}
    .contrast-white-black .prompt-body strong{color:#f7fafc!important}
    .contrast-white-black .prompt-topic-foot{color:#f7fafc!important}
    .contrast-yellow-black .prompt-topic-foot{color:#f6e05e!important}
    .contrast-white-black .chart-track{background:#2d3748!important;border-color:#4a5568!important}
    .contrast-yellow-black .exam-shell,.contrast-yellow-black .workspace,.contrast-yellow-black .prompt-panel,.contrast-yellow-black .editor-panel,.contrast-yellow-black .writing-task-strip,.contrast-yellow-black .bottom-bar{background:#0a0a0a!important;color:#f6e05e!important}
    .contrast-yellow-black .prompt-frame{background:transparent!important}
    .contrast-yellow-black .task1-intro,.contrast-yellow-black .task2-prompt-frame{background:#0a0a0a!important;color:#f6e05e!important;border-color:#f6e05e!important}
    .contrast-yellow-black .editor-box,.contrast-yellow-black textarea{background:#050505!important;color:#f6e05e!important;border-color:#718096!important}
    .contrast-yellow-black .resize-handle{background:#000!important;border-color:#718096!important}
    .contrast-yellow-black .resize-handle::before{background:#1a202c!important;border-color:#a0aec0!important;color:#f6e05e!important}
    .contrast-yellow-black .prompt-body strong{color:#f6e05e!important}
    .contrast-white-black .exam-shell>header,.contrast-white-black .menu-button,.contrast-white-black .icon-button{background:#111!important;border-color:#4a5568!important;color:#f7fafc!important}
    .contrast-white-black .menu-icon span{background:#f7fafc!important}
    .contrast-white-black .timer{color:#fca5a5!important;background:rgba(127,29,29,.4)!important;border-color:#7f1d1d!important}
    .contrast-yellow-black .exam-shell>header,.contrast-yellow-black .menu-button,.contrast-yellow-black .icon-button{background:#000!important;border-color:#718096!important;color:#f6e05e!important}
    .contrast-yellow-black .menu-icon span{background:#f6e05e!important}
    .contrast-yellow-black .timer{color:#f6e05e!important;background:rgba(113,63,18,.5)!important;border-color:#b45309!important}
    .contrast-white-black .options-modal{background:rgba(0,0,0,.75)}
    .contrast-white-black .options-modal .modal-content{background:#111!important;color:#f7fafc!important}
    .contrast-white-black .options-list,.contrast-white-black .submenu button{background:#1a202c!important;border-color:#4a5568!important;color:#f7fafc!important}
    .contrast-white-black .option-row{background:#1a202c!important;border-color:#4a5568!important}
    .contrast-white-black .close-btn{color:#f7fafc!important}
    .contrast-yellow-black .options-modal{background:rgba(0,0,0,.85)}
    .contrast-yellow-black .options-modal .modal-content{background:#000!important;color:#f6e05e!important}
    .contrast-yellow-black .options-list,.contrast-yellow-black .submenu button{background:#0a0a0a!important;border-color:#4a5568!important;color:#f6e05e!important}
    .contrast-yellow-black .option-row{background:#0a0a0a!important;border-color:#4a5568!important}
    .contrast-yellow-black .close-btn{color:#f6e05e!important}
    .contrast-white-black .bottom-bar{border-top-color:#4a5568!important;border-bottom-color:#f7fafc!important}
    .contrast-white-black .bottom-cell--p1,.contrast-white-black .bottom-cell--submit{background:#1a1a1a!important;border-left-color:#4a5568!important}
    .contrast-white-black .bottom-cell--p1.is-active{background:#252525!important}
    .contrast-white-black .bottom-cell--p2{background:#2d3748!important}
    .contrast-white-black .bottom-cell--p2.is-active{background:#374151!important}
    .contrast-white-black .bottom-cell--submit{color:#f7fafc!important}
    .contrast-yellow-black .bottom-bar{border-top-color:#718096!important;border-bottom-color:#f6e05e!important}
    .contrast-yellow-black .bottom-cell--p1,.contrast-yellow-black .bottom-cell--submit{background:#0a0a0a!important;border-left-color:#718096!important}
    .contrast-yellow-black .bottom-cell--p1.is-active{background:#141414!important}
    .contrast-yellow-black .bottom-cell--p2{background:#29220e!important}
    .contrast-yellow-black .bottom-cell--p2.is-active{background:#3d330f!important}
    .contrast-yellow-black .bottom-cell--submit{color:#f6e05e!important}
    @media (max-width:980px){
      body{overflow:auto}
      .exam-shell>header{flex-direction:column;gap:10px;padding:10px}
      .writing-task-strip{flex-direction:column;gap:8px;padding:12px 16px}
      .workspace{flex-direction:column}
      .prompt-panel,.editor-panel{width:100%!important;padding:16px;border-right:none}
      .resize-handle{display:none}
      .bottom-bar{grid-template-columns:1fr 1fr 48px}
      .bottom-cell--p1,.bottom-cell--p2{padding:10px 12px}
      .editor-box{min-height:200px}
    }
  
    /* Contrast submit card patch: keep writing submit modal readable */
    .contrast-white-black .submit-card,
    .contrast-white-black .submit-meta-row{background:#111827!important;color:#f7fafc!important;border-color:#4a5568!important}
    .contrast-yellow-black .submit-card,
    .contrast-yellow-black .submit-meta-row{background:#050505!important;color:#f6e05e!important;border-color:#718096!important}
    .contrast-white-black .submit-card p{color:#f7fafc!important}
    .contrast-yellow-black .submit-card p{color:#f6e05e!important}