/* ============ Design tokens — white-blue corporate palette ============ */
    :root{
        --primary:#1e40af;
        --primary-700:#1e3a8a;
        --primary-600:#1d4ed8;
        --primary-500:#2563eb;
        --primary-400:#3b82f6;
        --primary-300:#60a5fa;
        --primary-200:#bfdbfe;
        --primary-100:#dbeafe;
        --primary-50:#eff6ff;
        --accent:#0ea5e9;
        --accent-600:#0284c7;
        --surface:#ffffff;
        --bg:#f6f8fc;
        --bg-alt:#f1f5f9;
        --border:#e2e8f0;
        --border-strong:#cbd5e1;
        --text:#0f172a;
        --text-muted:#475569;
        --text-light:#94a3b8;
        --success:#16a34a;
        --success-light:#dcfce7;
        --warning:#f59e0b;
        --warning-light:#fef3c7;
        --danger:#dc2626;
        --danger-light:#fee2e2;
        --info:#0ea5e9;
        --info-light:#e0f2fe;
        --shadow-xs:0 1px 2px rgba(15,23,42,.04);
        --shadow-sm:0 1px 3px rgba(15,23,42,.05),0 1px 2px rgba(15,23,42,.04);
        --shadow:0 4px 12px rgba(15,23,42,.06);
        --shadow-md:0 8px 22px rgba(15,23,42,.08);
        --shadow-lg:0 18px 36px rgba(15,23,42,.10);
        --shadow-blue:0 8px 22px rgba(37,99,235,.18);
        --radius:12px;
        --radius-lg:16px;
        --radius-xl:20px;
    }

    *,*::before,*::after{box-sizing:border-box}
    html,body{height:100%}
    body{
        margin:0;
        font-family:'Inter','Segoe UI',-apple-system,BlinkMacSystemFont,Roboto,sans-serif;
        background:var(--bg);
        color:var(--text);
        font-size:15px;line-height:1.55;
        -webkit-font-smoothing:antialiased;
        user-select:none;
        min-height:100vh;
    }
    a{color:var(--primary)}

    /* ============ Header ============ */
    header{
        background:linear-gradient(135deg,var(--primary-500) 0%,var(--primary) 100%);
        color:#fff;padding:34px 0 30px;position:relative;overflow:hidden;
        border-bottom:1px solid var(--primary-700);
        margin-bottom:28px;
        border-radius:0 0 18px 18px;
        box-shadow:var(--shadow-blue);
    }
    header::before{
        content:'';position:absolute;top:0;left:0;right:0;height:3px;
        background:linear-gradient(90deg,var(--primary-300),var(--accent),var(--primary-300));
    }
    header .container{display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center}
    header h1{
        margin:0;font-size:1.85rem;font-weight:900;letter-spacing:-.02em;
        display:flex;align-items:center;gap:14px;
        text-shadow:0 2px 8px rgba(15,23,42,.16);
    }
    header h1 i{color:#bfdbfe;text-shadow:0 0 20px rgba(191,219,254,.4)}
    header p{margin:6px 0 0;opacity:.94;font-size:1rem;font-weight:500}
    body.testing-mode header{padding:14px 0 16px;margin-bottom:14px;border-radius:0 0 12px 12px}
    body.testing-mode header h1{font-size:1.25rem}
    body.testing-mode header p,body.testing-mode #header-actions{display:none !important}

    #header-actions{margin-top:14px;display:flex;justify-content:center;gap:10px;flex-wrap:wrap}
    #go-admin-btn{
        background:rgba(255,255,255,.18) !important;
        backdrop-filter:blur(8px);
        border:1px solid rgba(255,255,255,.3) !important;
        color:#fff !important;
        font-weight:700;
        padding:10px 20px !important;border-radius:999px !important;
        transition:all .15s;
    }
    #go-admin-btn:hover{background:rgba(255,255,255,.28) !important;transform:translateY(-1px)}

    /* ============ Container ============ */
    .container{max-width:1200px;margin:0 auto;padding:0 20px}
    .footer{
        text-align:center;padding:28px 16px 36px;color:var(--text-muted);font-size:13px;
    }

    /* ============ Modern setup cards (upload / user-info / settings) ============ */
    .json-upload-container,.user-info-form,.test-settings-form,.password-settings{
        background:#fff;border:1px solid var(--border);
        border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);
        padding:36px;margin:18px auto;max-width:760px;
        position:relative;overflow:hidden;
    }
    .json-upload-container::before,.user-info-form::before,.test-settings-form::before,.password-settings::before{
        content:'';position:absolute;left:0;right:0;top:0;height:4px;
        background:linear-gradient(90deg,var(--primary-500),var(--accent),var(--primary-300));
    }
    .json-upload-container h3,.user-info-form h3,.test-settings-form h3,.password-settings h3{
        margin:0 0 22px;font-size:22px;font-weight:800;letter-spacing:-.02em;color:var(--text);
        display:flex;align-items:center;gap:10px;justify-content:center;
    }
    .json-upload-container h3 i,.user-info-form h3 i,.test-settings-form h3 i,.password-settings h3 i{color:var(--primary)}
    .json-upload-container p{color:var(--text-muted);margin:-14px 0 18px;text-align:center}

    /* ============ Forms ============ */
    .form-group{display:flex;flex-direction:column;gap:6px;min-width:0;margin-bottom:18px}
    .form-group label{
        font-weight:600;font-size:13px;color:var(--text-muted);
        display:flex;align-items:center;gap:6px;
    }
    .form-group label i{color:var(--text-light)}
    .form-group input,.form-group select,.form-group textarea{
        width:100%;padding:12px 14px;
        border:1px solid var(--border);border-radius:10px;background:#fff;
        font-size:15px;font-family:inherit;color:var(--text);
        transition:border-color .15s,box-shadow .15s;
    }
    .form-group input:focus,.form-group select:focus,.form-group textarea:focus{
        outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-100);
    }
    .form-group input[type="file"]{padding:8px 12px;background:var(--bg-alt)}
    .form-group input[type="radio"]{width:auto !important;accent-color:var(--primary)}
    .password-note{font-size:12px;color:var(--text-light);margin-top:4px}
    .security-note{font-size:12px;color:var(--text-light);margin-top:6px}

    .form-controls{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:8px}
    .time-slider-container{flex:1;min-width:160px}
    .time-slider{
        width:100%;height:6px;-webkit-appearance:none;appearance:none;
        background:var(--bg-alt);border-radius:999px;outline:none;
    }
    .time-slider::-webkit-slider-thumb{
        -webkit-appearance:none;width:20px;height:20px;border-radius:50%;
        background:linear-gradient(135deg,var(--primary-500),var(--primary));cursor:pointer;
        box-shadow:0 4px 10px rgba(37,99,235,.35);
    }
    .time-slider::-moz-range-thumb{
        width:20px;height:20px;border-radius:50%;border:0;
        background:linear-gradient(135deg,var(--primary-500),var(--primary));cursor:pointer;
        box-shadow:0 4px 10px rgba(37,99,235,.35);
    }
    .time-input{
        width:90px;padding:9px 12px;border:1px solid var(--border);border-radius:10px;
        font-size:15px;font-weight:700;text-align:center;font-family:inherit;background:#fff;
    }
    .time-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-100)}
    .time-display{
        margin-top:8px;padding:8px 12px;background:var(--primary-50);
        border:1px solid var(--primary-100);border-radius:8px;
        color:var(--primary-700);font-size:13px;font-weight:600;
        display:flex;align-items:center;gap:6px;
    }
    .shuffle-info{
        font-size:12px;color:var(--text-light);margin-top:6px;font-style:italic;
    }

    .shuffle-control{
        display:flex;align-items:center;justify-content:space-between;
        padding:14px 16px;background:var(--bg-alt);border-radius:12px;
        margin-bottom:8px;
    }
    .shuffle-label{display:flex;align-items:center;gap:10px;font-weight:600}
    .shuffle-label i{color:var(--primary)}
    .shuffle-switch{position:relative;display:inline-block;width:50px;height:28px}
    .shuffle-switch input{opacity:0;width:0;height:0}
    .shuffle-slider{
        position:absolute;cursor:pointer;inset:0;
        background:var(--border-strong);border-radius:999px;transition:.2s;
    }
    .shuffle-slider::before{
        content:"";position:absolute;height:22px;width:22px;
        left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s;
        box-shadow:var(--shadow-xs);
    }
    .shuffle-switch input:checked + .shuffle-slider{background:linear-gradient(135deg,var(--primary-500),var(--primary))}
    .shuffle-switch input:checked + .shuffle-slider::before{transform:translateX(22px)}

    .settings-buttons{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}

    /* ============ Buttons ============ */
    .btn{
        display:inline-flex;align-items:center;justify-content:center;gap:8px;
        padding:12px 22px;border:1px solid transparent;border-radius:10px;
        font-weight:700;font-size:15px;cursor:pointer;
        transition:all .15s;text-decoration:none;
        font-family:inherit;line-height:1;white-space:nowrap;
    }
    .btn:focus-visible{outline:3px solid var(--primary-100);outline-offset:2px}
    .btn-primary{background:linear-gradient(135deg,var(--primary-500),var(--primary));color:#fff;box-shadow:var(--shadow-blue)}
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 14px 28px rgba(37,99,235,.28)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--border)}
    .btn-secondary:hover{background:var(--bg-alt);border-color:var(--border-strong)}
    .btn-success{background:var(--success);color:#fff}
    .btn-success:hover{background:#15803d;transform:translateY(-1px)}
    .btn-warning{background:linear-gradient(135deg,var(--accent),var(--accent-600));color:#fff}
    .btn-warning:hover{transform:translateY(-1px);box-shadow:0 8px 18px rgba(14,165,233,.25)}
    .btn-danger{background:var(--danger);color:#fff}
    .btn-danger:hover{background:#b91c1c;transform:translateY(-1px)}
    .btn-info{background:var(--info);color:#fff}
    .btn-info:hover{background:#0284c7;transform:translateY(-1px)}
    .btn-excel{background:#16a34a;color:#fff}
    .btn-excel:hover{background:#15803d;transform:translateY(-1px)}
    .btn-word{background:var(--primary-600);color:#fff}
    .btn-word:hover{background:var(--primary);transform:translateY(-1px)}
    .btn[disabled],.btn.disabled{opacity:.55;cursor:not-allowed;transform:none !important}

    /* ============ Upload area ============ */
    .upload-area{
        border:2px dashed var(--border-strong);
        background:var(--bg-alt);
        border-radius:var(--radius-lg);
        padding:42px 22px;text-align:center;cursor:pointer;
        transition:all .2s;
    }
    .upload-area i{font-size:46px;color:var(--primary-400);display:block;margin-bottom:10px}
    .upload-area h4{margin:0 0 6px;font-size:17px;font-weight:700;color:var(--text)}
    .upload-area p{margin:0;color:var(--text-muted);font-size:14px}
    .upload-area:hover,.upload-area.dragover{border-color:var(--primary);background:var(--primary-50)}
    .upload-area.dragover i{color:var(--primary)}
    .upload-success,.upload-error,.uploaded-file-info{
        display:none;margin-top:14px;padding:13px 16px;border-radius:10px;
        font-size:14px;font-weight:600;
    }
    .upload-success{background:var(--success-light);color:#166534}
    .upload-success.visible{display:block}
    .upload-error{background:var(--danger-light);color:#991b1b}
    .uploaded-file-info{background:var(--primary-50);color:var(--primary-700);border:1px solid var(--primary-100);font-weight:500}
    .upload-info{font-size:12px;color:var(--text-light);margin-top:10px;text-align:center}

    #available-tests-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;margin-top:6px}
    .catalog-test-card{
        background:#fff;border:1px solid var(--border);border-radius:14px;
        padding:14px 16px;cursor:pointer;transition:all .15s;
        display:flex;flex-direction:column;gap:6px;text-align:left;
    }
    .catalog-test-card:hover{border-color:var(--primary-300);transform:translateY(-1px);box-shadow:var(--shadow)}
    .catalog-test-card-title{font-weight:700;color:var(--text)}
    .catalog-test-card-desc{font-size:13px;color:var(--text-muted);line-height:1.4}
    .catalog-test-card-meta{font-size:12px;color:var(--text-light);display:flex;gap:8px;flex-wrap:wrap}
    .catalog-test-card-badge{
        align-self:flex-start;font-size:11px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;
        padding:3px 8px;border-radius:999px;background:var(--bg-alt);color:var(--text-muted);
    }
    .catalog-test-card-badge.custom{background:var(--info-light);color:var(--accent-600)}

    /* ============ Test info cards ============ */
    .test-info{display:none !important}
    .info-item{
        background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
        padding:18px 16px;text-align:center;box-shadow:var(--shadow-xs);
        transition:transform .15s,box-shadow .15s;
        position:relative;overflow:hidden;
    }
    .info-item::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(180deg,var(--primary-500),var(--primary))}
    .info-item:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
    .info-item i{font-size:22px;color:var(--primary);margin-bottom:8px;display:block}
    .info-item h3{margin:4px 0 2px;font-size:18px;font-weight:800;letter-spacing:-.01em;color:var(--text)}
    .info-item p{margin:0;color:var(--text-muted);font-size:13px}

    /* ============ TIMER (classic floating, recolored) ============ */
    .timer-container{
        background:rgba(255,255,255,.16);
        padding:11px 22px;border-radius:999px;font-weight:700;
        display:none;align-items:center;gap:12px;
        margin-top:18px;
        backdrop-filter:blur(10px);
        border:1px solid rgba(255,255,255,.25);
        box-shadow:0 4px 14px rgba(15,23,42,.1);
        color:#fff;
    }
    body.testing-mode .timer-container{display:inline-flex}
    .timer-container.floating-timer{
        position:fixed;top:18px;right:18px;z-index:50;
        background:linear-gradient(135deg,var(--primary-500),var(--primary));
        color:#fff;border:0;margin:0;
        box-shadow:var(--shadow-blue),0 0 0 4px rgba(255,255,255,.6);
    }
    .timer{
        font-size:1.55rem;font-family:'Inter','Courier New',monospace;
        letter-spacing:.5px;font-variant-numeric:tabular-nums;font-weight:800;
    }
    .timer.warning{color:#fde68a;animation:pulseT 1.5s infinite;text-shadow:0 0 10px rgba(253,230,138,.5)}
    .timer.danger{color:#fecaca;animation:pulseT 1s infinite;text-shadow:0 0 10px rgba(254,202,202,.6)}
    @keyframes pulseT{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.05);opacity:.92}}

    /* ============ Progress bar (classic style) ============ */
    .progress-container{
        width:100%;background:var(--bg-alt);border-radius:12px;
        margin:24px 0;height:14px;overflow:hidden;
        display:none;
        box-shadow:inset 0 2px 5px rgba(15,23,42,.08);
    }
    body.testing-mode .progress-container{display:block}
    .progress-bar{
        height:100%;
        background:linear-gradient(90deg,var(--primary-500) 0%,var(--primary) 100%);
        border-radius:12px;width:0%;transition:width .5s ease;
        position:relative;overflow:hidden;
    }
    .progress-bar::after{
        content:'';position:absolute;inset:0;
        background-image:linear-gradient(-45deg,rgba(255,255,255,.22) 25%,transparent 25%,transparent 50%,rgba(255,255,255,.22) 50%,rgba(255,255,255,.22) 75%,transparent 75%,transparent);
        background-size:30px 30px;animation:moveStripes 1s linear infinite;
    }
    @keyframes moveStripes{0%{background-position:0 0}100%{background-position:30px 0}}

    /* ============ SINGLE QUESTION (classic style, recolored) ============ */
    .single-question-container{
        display:none;background:#fff;
        padding:42px;border-radius:15px;
        box-shadow:var(--shadow);
        margin-bottom:30px;
        position:relative;border:1px solid var(--primary-100);
        transform:translateY(0);transition:transform .3s ease;
    }
    .single-question-container.warning-pulse{animation:questionWarningPulse 1s infinite}
    @keyframes questionWarningPulse{
        0%{box-shadow:0 0 0 0 rgba(220,38,38,.4)}
        70%{box-shadow:0 0 0 12px rgba(220,38,38,0)}
        100%{box-shadow:0 0 0 0 rgba(220,38,38,0)}
    }
    .single-question-container:hover{transform:translateY(-3px)}

    .question-progress{
        display:flex;justify-content:space-between;align-items:center;
        gap:16px;flex-wrap:wrap;
        margin-bottom:30px;padding-bottom:22px;
        border-bottom:2px solid var(--primary-100);
    }
    .question-number-large{
        font-size:2.6rem;font-weight:900;letter-spacing:-.02em;
        background:linear-gradient(135deg,var(--primary-500),var(--primary));
        -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
    }
    .question-progress-text{font-size:1.15rem;color:var(--text-muted);font-weight:500;white-space:nowrap}
    .question-progress-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-left:auto}
    .question-progress-bar{
        flex:1;height:10px;background:var(--bg-alt);border-radius:5px;
        margin:0 22px;overflow:hidden;
        box-shadow:inset 0 1px 3px rgba(15,23,42,.08);
    }
    .question-progress-fill{
        height:100%;background:linear-gradient(90deg,var(--primary-500),var(--primary));
        border-radius:5px;width:0%;transition:width .5s ease;
    }
    .question-time-indicator{
        display:inline-flex;align-items:center;justify-content:center;
        min-height:36px;padding:6px 14px;border-radius:999px;
        font-weight:700;gap:8px;font-size:.85rem;
        transition:all .25s ease;
        box-shadow:0 2px 5px rgba(15,23,42,.06);
        white-space:nowrap;
    }
    .question-time-indicator.green{background:rgba(22,163,74,.12);color:var(--success);border:2px solid var(--success)}
    .question-time-indicator.yellow{background:rgba(245,158,11,.12);color:var(--warning);border:2px solid var(--warning)}
    .question-time-indicator.red{background:rgba(220,38,38,.12);color:var(--danger);border:2px solid var(--danger);animation:blinkRed 1s infinite}
    @keyframes blinkRed{
        0%{border-color:var(--danger);box-shadow:0 0 5px rgba(220,38,38,.5)}
        50%{border-color:#f87171;box-shadow:0 0 12px rgba(248,113,113,.7)}
        100%{border-color:var(--danger);box-shadow:0 0 5px rgba(220,38,38,.5)}
    }

    .section-indicator{
        display:inline-flex;align-items:center;justify-content:center;
        min-height:36px;padding:6px 14px;
        background:linear-gradient(135deg,var(--primary-50),var(--primary-100));
        color:var(--primary-600);border-radius:999px;
        font-weight:700;margin-bottom:22px;font-size:.9rem;
        border:2px solid var(--primary-100);
        box-shadow:0 3px 10px rgba(15,23,42,.04);
    }

    .single-question-text{
        font-size:1.3rem;font-weight:600;margin-bottom:36px;color:var(--text);
        line-height:1.85;padding:16px 18px;
        background:var(--primary-50);border-radius:10px;
        border-left:4px solid var(--primary-500);
    }

    .single-options{display:flex;flex-direction:column;gap:16px;margin-bottom:38px}
    .single-option{
        padding:20px;border:2px solid var(--border);border-radius:12px;
        cursor:pointer;transition:all .25s ease;
        display:flex;align-items:center;background:#fff;
    }
    .single-option:hover:not(.locked){
        background:var(--primary-50);border-color:var(--primary-300);
        transform:translateY(-2px);box-shadow:0 5px 14px rgba(15,23,42,.06);
    }
    .single-option.selected{
        background:var(--primary-100);border-color:var(--primary-500);
        box-shadow:0 5px 18px rgba(37,99,235,.18);
        transform:translateY(-2px);
    }
    .single-option.correct{
        background:var(--success-light);border-color:var(--success);
        box-shadow:0 5px 18px rgba(22,163,74,.12);
    }
    .single-option.incorrect{
        background:var(--danger-light);border-color:var(--danger);
        box-shadow:0 5px 18px rgba(220,38,38,.1);
    }
    .single-option.locked{cursor:not-allowed;opacity:.92}
    .single-option.locked:hover{transform:none;box-shadow:none;background:#fff}
    .single-option-letter{
        display:inline-flex;align-items:center;justify-content:center;
        width:44px;height:44px;background:var(--bg-alt);border-radius:50%;
        text-align:center;margin-right:22px;
        font-weight:800;font-size:1.15rem;flex-shrink:0;
        transition:all .25s ease;
    }
    .selected .single-option-letter{
        background:linear-gradient(135deg,var(--primary-500),var(--primary));color:#fff;
        box-shadow:0 3px 10px rgba(37,99,235,.3);
    }
    .correct .single-option-letter{
        background:linear-gradient(135deg,var(--success),#15803d);color:#fff;
        box-shadow:0 3px 10px rgba(22,163,74,.3);
    }
    .incorrect .single-option-letter{
        background:linear-gradient(135deg,var(--danger),#b91c1c);color:#fff;
        box-shadow:0 3px 10px rgba(220,38,38,.3);
    }
    .single-option-text{font-size:1.1rem;flex:1;color:var(--text);line-height:1.55;min-width:0}

    .single-question-controls{
        display:flex;justify-content:space-between;align-items:center;
        padding-top:30px;border-top:2px solid var(--primary-100);gap:14px;flex-wrap:wrap;
    }
    .single-question-navigation{display:flex;gap:14px;flex-wrap:wrap}

    .question-bookmark{
        position:absolute;top:22px;right:22px;
        color:var(--accent);font-size:1.6rem;cursor:pointer;
        opacity:.55;transition:all .25s ease;
        filter:drop-shadow(0 2px 5px rgba(15,23,42,.15));
    }
    .question-bookmark:hover{opacity:.85;transform:scale(1.1)}
    .question-bookmark.active{
        opacity:1;color:var(--primary-500);
        filter:drop-shadow(0 3px 8px rgba(37,99,235,.4));
    }

    /* answer feedback (classic) */
    .answer-feedback{
        margin-top:24px;padding:18px;border-radius:12px;
        text-align:center;font-weight:700;font-size:1.1rem;
        display:none;animation:fadeIn .4s ease;
    }
    .answer-feedback.correct{background:linear-gradient(135deg,var(--success-light),#bbf7d0);border:2px solid var(--success);color:#14532d}
    .answer-feedback.incorrect{background:linear-gradient(135deg,var(--danger-light),#fecaca);border:2px solid var(--danger);color:#7f1d1d}
    .correct-answer-indicator{
        margin-top:14px;padding:12px;background:var(--success-light);
        border-radius:8px;border-left:4px solid var(--success);
        font-weight:600;color:#14532d;
    }
    @keyframes fadeIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
    .show-correct-answer{animation:hlCorrect .8s ease}
    @keyframes hlCorrect{0%{transform:scale(1)}50%{transform:scale(1.04);box-shadow:0 0 22px rgba(22,163,74,.4)}100%{transform:scale(1)}}
    .highlight-incorrect{animation:hlIncorrect .8s ease}
    @keyframes hlIncorrect{0%{transform:scale(1)}50%{transform:scale(.98);box-shadow:0 0 16px rgba(220,38,38,.3)}100%{transform:scale(1)}}

    /* ============ Floating jump-btn / bookmarks-btn (classic) ============ */
    .jump-to-question{position:fixed;bottom:32px;right:32px;z-index:100;display:none}
    body.testing-mode .jump-to-question{display:block}
    .jump-btn{
        width:62px;height:62px;border-radius:50%;
        background:linear-gradient(135deg,var(--primary-500),var(--primary));
        color:#fff;border:0;font-size:1.6rem;cursor:pointer;
        box-shadow:0 6px 20px rgba(37,99,235,.32);
        transition:all .25s ease;
        display:flex;align-items:center;justify-content:center;
        position:relative;overflow:hidden;
    }
    .jump-btn::before{
        content:'';position:absolute;inset:0;
        background:radial-gradient(circle,rgba(255,255,255,.32) 0%,transparent 70%);
        opacity:0;transition:opacity .25s;
    }
    .jump-btn:hover{transform:scale(1.12) rotate(4deg);box-shadow:0 10px 28px rgba(37,99,235,.4)}
    .jump-btn:hover::before{opacity:1}
    .jump-dropdown{
        position:absolute;bottom:74px;right:0;
        background:#fff;border-radius:16px;
        box-shadow:0 18px 40px rgba(15,23,42,.18);
        width:340px;max-height:460px;overflow-y:auto;
        display:none;padding:20px;
        border:1px solid var(--primary-100);
    }
    .jump-dropdown.active{display:block;animation:slideUp .3s ease}
    @keyframes slideUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
    .jump-title{
        color:var(--primary-700);font-weight:800;font-size:1.15rem;
        margin-bottom:18px;padding-bottom:14px;
        border-bottom:2px solid var(--primary-100);
        display:flex;align-items:center;gap:10px;
    }
    .jump-section{margin-bottom:18px}
    .jump-section-title{font-size:.92rem;color:var(--text-muted);margin-bottom:10px;font-weight:700;padding-left:4px}
    .jump-questions{display:flex;flex-wrap:wrap;gap:8px}
    .jump-question-btn{
        width:42px;height:42px;border-radius:50%;
        border:2px solid var(--border);background:#fff;color:var(--text);
        font-weight:800;cursor:pointer;transition:all .2s ease;
        display:flex;align-items:center;justify-content:center;
        font-size:1rem;font-family:inherit;
    }
    .jump-question-btn:hover{border-color:var(--primary);background:var(--primary-50);transform:scale(1.08)}
    .jump-question-btn.answered{
        background:linear-gradient(135deg,var(--success-light),#bbf7d0);
        border-color:var(--success);color:#14532d;
        box-shadow:0 3px 10px rgba(22,163,74,.18);
    }
    .jump-question-btn.current{
        background:linear-gradient(135deg,var(--accent),var(--accent-600));
        border-color:var(--accent-600);color:#fff;
        box-shadow:0 4px 14px rgba(14,165,233,.45);
        transform:scale(1.08);
        animation:pulseCurrent 2s infinite;
    }
    @keyframes pulseCurrent{
        0%{box-shadow:0 4px 14px rgba(14,165,233,.45)}
        50%{box-shadow:0 4px 22px rgba(14,165,233,.7)}
        100%{box-shadow:0 4px 14px rgba(14,165,233,.45)}
    }
    .jump-question-btn.skipped{
        background:var(--info-light);border-color:var(--accent);color:var(--accent-600);
        box-shadow:0 3px 10px rgba(14,165,233,.18);
    }

    .bookmarked-questions{position:fixed;bottom:32px;left:32px;z-index:100;display:none}
    body.testing-mode .bookmarked-questions{display:block}
    .bookmarks-btn{
        width:62px;height:62px;border-radius:50%;
        background:linear-gradient(135deg,var(--primary-300),var(--primary-500));
        color:#fff;border:0;font-size:1.55rem;cursor:pointer;
        box-shadow:0 6px 20px rgba(37,99,235,.28);
        transition:all .25s ease;
        display:flex;align-items:center;justify-content:center;
        position:relative;overflow:hidden;
    }
    .bookmarks-btn::before{
        content:'';position:absolute;inset:0;
        background:radial-gradient(circle,rgba(255,255,255,.32) 0%,transparent 70%);
        opacity:0;transition:opacity .25s;
    }
    .bookmarks-btn:hover{transform:scale(1.12) rotate(-4deg);box-shadow:0 10px 28px rgba(37,99,235,.4)}
    .bookmarks-btn:hover::before{opacity:1}
    .bookmarks-dropdown{
        position:absolute;bottom:74px;left:0;
        background:#fff;border-radius:16px;
        box-shadow:0 18px 40px rgba(15,23,42,.18);
        width:340px;max-height:460px;overflow-y:auto;
        display:none;padding:20px;
        border:1px solid var(--primary-100);
    }
    .bookmarks-dropdown.active{display:block;animation:slideUp .3s ease}
    .bookmarks-list{display:flex;flex-wrap:wrap;gap:8px}
    .no-bookmarks{
        color:var(--text-muted);font-style:italic;text-align:center;
        padding:24px 12px;font-size:1rem;
    }

    /* difficulty / training */
    .difficulty-indicator{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:700}
    .difficulty-easy{background:var(--success-light);color:#166534}
    .difficulty-medium{background:var(--warning-light);color:#92400e}
    .difficulty-hard{background:var(--danger-light);color:#991b1b}
    .training-mode-indicator{
        display:inline-flex;align-items:center;gap:6px;
        padding:6px 16px;border-radius:999px;
        background:linear-gradient(135deg,var(--accent),var(--primary-500));
        color:#fff;font-weight:700;font-size:.85rem;margin-left:6px;
        box-shadow:0 3px 10px rgba(14,165,233,.25);
    }
    .training-mode-hint{
        font-size:13px;color:var(--text-muted);margin-top:8px;
        padding:10px 14px;background:var(--info-light);border-radius:8px;
        border:1px solid var(--primary-100);
    }

    /* ============ Result panel (modern look) ============ */
    .result-panel{
        display:none;background:#fff;border:1px solid var(--border);
        border-radius:var(--radius-xl);padding:34px;
        box-shadow:var(--shadow-sm);margin:18px auto;max-width:980px;
        position:relative;overflow:hidden;
    }
    .result-panel::before{
        content:'';position:absolute;left:0;right:0;top:0;height:4px;
        background:linear-gradient(90deg,var(--primary-500),var(--accent),var(--success));
    }
    .result-panel h2{
        margin:0 0 20px;font-size:24px;font-weight:900;letter-spacing:-.02em;
        display:flex;align-items:center;gap:10px;
    }
    .result-panel h2 i{color:var(--primary)}
    .result-user-info{
        display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;
        background:var(--primary-50);border:1px solid var(--primary-100);
        border-radius:14px;padding:16px 18px;margin-bottom:20px;
    }
    .result-user-info > div{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text)}
    .result-user-info i{color:var(--primary)}

    .score-circle{
        margin:18px auto;width:200px;height:200px;border-radius:50%;
        background:conic-gradient(var(--primary) 0%,var(--primary) 0%,var(--bg-alt) 0%);
        display:flex;align-items:center;justify-content:center;flex-direction:column;
        position:relative;
    }
    .score-circle::after{
        content:'';position:absolute;inset:14px;background:#fff;border-radius:50%;
        box-shadow:inset 0 0 0 1px var(--border);
    }
    .score{position:relative;z-index:1;font-size:42px;font-weight:900;color:var(--primary);letter-spacing:-.02em}
    .score-label{position:relative;z-index:1;font-size:13px;color:var(--text-muted);margin-top:4px}

    .results-details{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin:20px 0}
    .result-item{
        background:#fff;border:1px solid var(--border);border-radius:14px;
        padding:16px;text-align:center;box-shadow:var(--shadow-xs);
    }
    .result-value{font-size:24px;font-weight:900;color:var(--text)}
    .result-value.correct{color:var(--success)}
    .result-value.incorrect{color:var(--danger)}
    .result-label{margin-top:4px;color:var(--text-muted);font-size:13px}

    .extended-stats{
        background:var(--primary-50);border:1px solid var(--primary-100);
        border-radius:14px;padding:18px;margin-top:14px;
    }
    .extended-stats h3{margin:0 0 14px;font-size:16px;font-weight:800;color:var(--primary-700);display:flex;align-items:center;gap:8px}
    .stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px;margin-bottom:14px}
    .stat-item{background:#fff;border:1px solid var(--border);border-radius:10px;padding:10px 12px;text-align:center}
    .stat-value{font-size:20px;font-weight:900;color:var(--primary);letter-spacing:-.02em}
    .stat-label{font-size:12px;color:var(--text-muted);margin-top:2px}
    .section-stats{display:flex;flex-direction:column;gap:8px}
    .section-stat-item{background:#fff;border:1px solid var(--border);border-radius:10px;padding:12px}
    .section-stat-header{display:flex;justify-content:space-between;align-items:center;font-size:13px;font-weight:700;color:var(--text);margin-bottom:6px}
    .section-stat-name{display:flex;align-items:center;gap:6px}
    .section-stat-name i{color:var(--primary)}
    .section-stat-percentage{color:var(--primary);font-weight:800}
    .section-stat-bar{height:6px;background:var(--bg-alt);border-radius:999px;overflow:hidden}
    .section-stat-fill{height:100%;background:linear-gradient(90deg,var(--primary-500),var(--accent));border-radius:999px;transition:width .4s}

    .export-buttons-container{display:flex;flex-direction:column;gap:10px;margin-top:20px}
    .export-btn-group{display:flex;gap:8px;flex-wrap:wrap}

    /* ============ Review section (modern) ============ */
    .review-section{
        display:none;background:#fff;border:1px solid var(--border);
        border-radius:var(--radius-xl);padding:30px;box-shadow:var(--shadow-sm);
        margin:18px auto;max-width:1100px;
    }
    .section-title{
        font-size:18px;font-weight:800;letter-spacing:-.01em;margin-bottom:14px;
        display:flex;align-items:center;gap:8px;color:var(--text);
    }
    .section-title i{color:var(--primary)}
    .review-question-counter{font-size:13px;color:var(--text-muted);margin-bottom:14px}
    .review-navigation{display:flex;gap:10px;justify-content:space-between;margin-top:18px;padding-top:14px;border-top:1px solid var(--border)}
    .review-controls{margin-top:14px;padding-top:14px;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}

    /* ============ Detailed results ============ */
    .detailed-results{
        display:none;background:#fff;border:1px solid var(--border);
        border-radius:var(--radius-xl);padding:26px;box-shadow:var(--shadow-sm);
        margin:18px auto;max-width:1100px;
    }
    .detailed-results-header{
        display:flex;justify-content:space-between;align-items:center;gap:10px;
        flex-wrap:wrap;margin-bottom:14px;padding-bottom:14px;border-bottom:1px solid var(--border);
    }
    .detailed-results-title{font-size:18px;font-weight:800;display:flex;align-items:center;gap:8px;color:var(--text)}
    .detailed-results-title i{color:var(--primary)}
    .result-item-header{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:8px;flex-wrap:wrap}
    .result-item-number{font-weight:700;color:var(--primary);font-size:13px;text-transform:uppercase;letter-spacing:.04em}
    .result-item-question{font-size:15px;font-weight:600;color:var(--text);margin:8px 0;line-height:1.5}
    .result-item-answers{display:flex;flex-direction:column;gap:8px;margin-top:10px}
    .result-item-answer{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:8px;background:var(--bg-alt);border:1px solid var(--border);font-size:14px}
    .result-item-answer.correct{background:var(--success-light);border-color:var(--success);color:#14532d}
    .result-item-answer.incorrect{background:var(--danger-light);border-color:var(--danger);color:#7f1d1d}
    .answer-letter{
        width:30px;height:30px;border-radius:50%;
        display:flex;align-items:center;justify-content:center;
        font-weight:800;font-size:14px;flex-shrink:0;
        box-shadow:0 2px 5px rgba(15,23,42,.08);
    }
    .answer-letter.user{background:linear-gradient(135deg,var(--primary-500),var(--primary));color:#fff}
    .answer-letter.correct{background:linear-gradient(135deg,var(--success),#15803d);color:#fff}
    .answer-letter.incorrect{background:linear-gradient(135deg,var(--danger),#b91c1c);color:#fff}
    .answer-text{flex:1}
    .result-item-status{display:inline-flex;align-items:center;gap:4px;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:700}
    .result-item-status.correct{background:var(--success-light);color:#166534}
    .result-item-status.incorrect{background:var(--danger-light);color:#991b1b}
    .result-item-status.skipped{background:var(--warning-light);color:#92400e}

    /* ============ Skipped questions (classic layout, recolored) ============ */
    .skipped-questions-container{
        background:#fff;
        padding:38px;border-radius:15px;
        box-shadow:var(--shadow);
        margin:14px auto 28px;max-width:1100px;
        border:1px solid var(--primary-100);
    }
    .skipped-questions-list{display:flex;flex-direction:column;gap:0}
    .skipped-question-item{
        padding:18px 22px;margin-bottom:14px;background:#fff;
        border-radius:10px;border-left:5px solid var(--accent);
        cursor:pointer;transition:all .25s ease;
        box-shadow:0 3px 10px rgba(15,23,42,.05);
        display:flex;align-items:center;gap:6px;
        font-size:1rem;color:var(--text);
    }
    .skipped-question-item:hover{
        background:var(--info-light);transform:translateX(8px);
        box-shadow:0 6px 16px rgba(15,23,42,.08);
    }
    .skipped-question-number{
        width:36px;height:36px;
        background:linear-gradient(135deg,var(--accent),var(--accent-600));
        color:#fff;border-radius:50%;
        margin-right:14px;font-weight:800;
        box-shadow:0 3px 10px rgba(14,165,233,.35);
        flex-shrink:0;display:flex;align-items:center;justify-content:center;
        font-size:.95rem;
    }
    .skipped-actions{
        display:flex;justify-content:center;gap:20px;
        margin-top:32px;padding-top:22px;
        border-top:2px solid var(--primary-100);flex-wrap:wrap;
    }

    /* Modals */
    .unanswered-modal,.password-modal,.restore-test-modal{
        display:none;position:fixed;inset:0;
        background:rgba(15,23,42,.55);backdrop-filter:blur(6px);
        z-index:998;align-items:center;justify-content:center;padding:20px;
    }
    .unanswered-form,.password-form,.restore-test-form{
        background:#fff;width:100%;max-width:540px;
        border-radius:var(--radius-xl);padding:30px;box-shadow:var(--shadow-lg);
        max-height:90vh;overflow:auto;animation:modalIn .25s ease-out;
    }
    @keyframes modalIn{from{opacity:0;transform:scale(.96) translateY(6px)}to{opacity:1;transform:none}}
    .unanswered-form h3,.password-form h3,.restore-test-form h3{
        margin:0 0 12px;font-size:20px;font-weight:800;letter-spacing:-.02em;
        display:flex;align-items:center;gap:10px;
    }
    .unanswered-form h3 i,.password-form h3 i,.restore-test-form h3 i{color:var(--primary)}
    .unanswered-form p,.password-form p,.restore-test-form p{color:var(--text-muted);margin:0 0 14px}
    .unanswered-list{
        max-height:200px;overflow:auto;border:1px solid var(--border);border-radius:10px;
        padding:8px;margin:10px 0;display:flex;flex-wrap:wrap;gap:6px;
    }
    .unanswered-item-number{
        display:inline-flex;align-items:center;justify-content:center;
        width:34px;height:34px;border-radius:50%;
        background:var(--info-light);color:var(--accent-600);font-weight:800;
        cursor:pointer;transition:all .15s;border:2px solid var(--accent);
    }
    .unanswered-item-number:hover{background:var(--accent);color:#fff;transform:scale(1.05)}
    .unanswered-actions,.password-actions,.restore-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
    .password-error{
        display:none;margin-top:8px;padding:10px 12px;
        background:var(--danger-light);color:#991b1b;
        border-radius:10px;font-size:13px;font-weight:600;
    }
    .password-error.visible{display:block}
    .restore-info{
        background:var(--primary-50);border:1px solid var(--primary-100);
        border-radius:10px;padding:12px 14px;margin:8px 0;font-size:14px;color:var(--primary-700);
    }

    /* Loading + pause overlays */
    .loading-questions{
        display:none;position:fixed;inset:0;
        background:rgba(255,255,255,.95);backdrop-filter:blur(8px);
        z-index:997;align-items:center;justify-content:center;flex-direction:column;gap:16px;
    }
    .loading-spinner{
        width:50px;height:50px;border:4px solid var(--bg-alt);
        border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite;
    }
    @keyframes spin{to{transform:rotate(360deg)}}
    .loading-questions h3{margin:0;font-weight:700;color:var(--text)}
    .loading-questions p{margin:0;color:var(--text-muted)}

    .pause-overlay{
        display:none;position:fixed;inset:0;
        background:rgba(15,23,42,.85);backdrop-filter:blur(6px);
        z-index:996;align-items:center;justify-content:center;padding:20px;
    }
    .pause-message{
        background:#fff;border-radius:var(--radius-xl);padding:32px;
        text-align:center;max-width:480px;box-shadow:var(--shadow-lg);
    }
    .pause-message h2{margin:0 0 12px;font-weight:800;color:var(--text);display:flex;align-items:center;justify-content:center;gap:10px}
    .pause-message h2 i{color:var(--accent)}
    .pause-message p{margin:6px 0;color:var(--text-muted)}

    .offline-notification{
        display:none;position:fixed;bottom:18px;left:18px;z-index:50;
        background:var(--accent);color:#fff;padding:10px 14px;border-radius:10px;
        font-weight:700;box-shadow:var(--shadow-md);
    }

    .export-progress{
        display:none;position:fixed;inset:0;
        background:rgba(15,23,42,.65);backdrop-filter:blur(6px);
        z-index:998;align-items:center;justify-content:center;padding:20px;
    }
    .export-progress-content{
        background:#fff;border-radius:var(--radius-xl);padding:28px;
        max-width:460px;width:100%;text-align:center;box-shadow:var(--shadow-lg);
    }
    .export-progress-content h3{margin:0 0 12px;font-weight:800;display:flex;align-items:center;justify-content:center;gap:8px;color:var(--text)}
    .export-progress-content h3 i{color:var(--primary)}
    .export-status{font-weight:600;color:var(--text-muted);margin-bottom:14px}
    .export-progress-bar{height:8px;background:var(--bg-alt);border-radius:999px;overflow:hidden;margin-bottom:8px}
    .export-progress-fill{height:100%;background:linear-gradient(90deg,var(--primary-500),var(--accent));border-radius:999px;transition:width .3s}

    .password-settings{display:none}
    .test-settings-info,.user-info{font-size:13px;color:var(--text-muted)}
    .highlight{background:var(--info-light);padding:0 4px;border-radius:4px;font-weight:700;color:var(--accent-600)}

    .all-questions-container{display:none}

    /* Hide setup screens during test */
    body.testing-mode .json-upload-container,
    body.testing-mode .user-info-form,
    body.testing-mode .test-settings-form,
    body.testing-mode .test-info,
    body.testing-mode .footer{display:none !important}

    /* ============ Mobile ============ */
    @media (max-width:900px){
        .container{padding:0 14px}
        header h1{font-size:1.45rem}
        header p{font-size:.92rem}
        .json-upload-container,.user-info-form,.test-settings-form,.result-panel{padding:24px}
        .single-question-container{padding:26px 22px}
        .single-question-text{font-size:1.15rem;line-height:1.7;padding:14px}
        .single-question-controls{flex-direction:column;align-items:stretch}
        .single-question-navigation{width:100%;justify-content:space-between}
        .single-question-navigation .btn{flex:1;min-width:140px}
        .jump-to-question{bottom:18px;right:18px}
        .bookmarked-questions{bottom:18px;left:18px}
        .jump-btn,.bookmarks-btn{width:54px;height:54px;font-size:1.3rem}
        .jump-dropdown,.bookmarks-dropdown{width:calc(100vw - 40px);max-width:340px}
        .question-progress-bar{margin:0 12px;flex:1 1 100%;order:10}
        .question-number-large{font-size:2rem}
        .score-circle{width:170px;height:170px}
        .score{font-size:34px}
    }