body {
            margin: 0;
            font-family: Arial, sans-serif;
            background: #f5f5f5;
        }

        /* MAIN LAYOUT */
        #container {
            display: flex;
            height: 100vh;
            padding-top: 55px;
        }

        
        /* LEFT SIDE */
        #leftSide {
            width: 70%;
            padding: 20px;
            overflow-y: auto;
            box-shadow: inset -2px 0 5px rgba(0,0,0,0.1);
            background: white;
        }

        .instruction-box {
            background: #eef6ff;
            padding: 15px;
            border-radius: 8px;
            margin-bottom: 20px;
        }

        .reference-box {
            background: #fff6da;
            padding: 15px;
            border-radius: 8px;
            margin-top: 10px;
        }

        .question-box {
            margin-top: 30px;
            padding: 20px;
            border-radius: 8px;
            background: #fafafa;
            border: 1px solid #ddd;
        }

        .options div {
            margin: 8px 0;
            padding: 10px;
            border: 1px solid #bbb;
            border-radius: 8px;
            cursor: pointer;
        }

        .options div:hover {
            background: #eee;
        }

        .selected {
            background: #d8ebff !important;
            border-color: #007bff;
        }

        /* RIGHT SIDE NAVIGATION */
        #rightSide {
            width: 30%;
            background: #f9f9f9;
            border-left: 2px solid #ddd;
            padding: 20px;
            overflow-y: auto;
        }
        #navList{
            display: flex;
            flex-wrap: wrap;
        }

        #navList div {
            padding: 6px;
            border-radius: 6px;
            cursor: pointer;
            background: #fff;
            border: 1px solid #ccc;
            text-align: center;
            font-weight: bold;
            margin: 4px;
            width: 5%;
            position: relative;
        }

        #navList div:hover {
            background: #dfefff;
        }

        .active-question {
            border: 3px solid #222 !important;
        }
        .skipped{
            background: #ff0000 !important;
            color: white !important;
            border-color: #960202;
        }
        .answered{
            background: #007104 !important;
            color: white !important;
            border-color: #007104 ;
        }
        .marked{
            background: #914bf9 !important;
            color: white !important;
            border-color: #914bf9;
        }
        .marked_answered{
            background: #914bf9 !important;
            color: white !important;
            border-color: #914bf9 ;
        }
        .marked_answered::after , .answered::after{
            content: "✔";
            position: absolute;
            bottom: -5px;          /* overlap downward */
            left: -5px;            /* overlap leftward */
            background: #28a745;   /* green circle background */
            color: white;
            font-size: 10px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid white;  /* neat border */
            box-shadow: 0 0 2px rgba(0,0,0,0.3);
        }
        img.section-image {
            width: 100%;
            max-height: 250px;
            object-fit: contain;
            margin-top: 10px;
            border-radius: 10px;
        }

        .buttons-container{
            width: 100%;
            display: flex;
            justify-content: center;
        }

        .button{
            padding: 10px;
            border-radius: 5px;
            margin: 20px;
            cursor: pointer;
            transition: all 0.3s;
        }
        .mark-button{
            background-color: #40a3fa;
        }
        .submit-button{
            display: inline-block;
            background-color: #40a3fa;
        }
        .save-button{
            background-color: #03a911;
        }
        .clear-button{
            background-color: #dd465f;
        }
        .button:hover{
            scale: 1.05;
        }

        #topNav {
            width: 100%;
            height: 55px;
            background: #0d6efd;
            color: white;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
            font-size: 18px;
            font-weight: bold;
            position: relative;
            top: 0;
            left: 0;
            z-index: 999;
        }

        #topNav .logo {
            font-size: 20px;
            margin-left: 20px;
        }

        #timer {
            font-size: 20px;
            font-weight: bold;
            background: rgba(255,255,255,0.2);
            padding: 4px 12px;
            border-radius: 8px;
            margin-right: 20px;
        }


        /* TOP NAV */
        #topBar {
            background: #0d6efd;
            color: white;
            padding: 18px 25px;
            font-size: 26px;
            font-weight: bold;
            box-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }

        /* DASHBOARD CONTAINER */
        #containerDashboard {
            padding: 30px;
        }

        table {
            width: 100%;
            background: white;
            border-radius: 8px;
            border-collapse: collapse;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            overflow: hidden;
        }

        th, td {
            padding: 14px;
            border-bottom: 1px solid #eee;
            text-align: left;
        }

        th {
            background: #f0f0f0;
            font-weight: bold;
        }

        tr:hover {
            background: #f9f9f9;
        }

        .btn {
            padding: 8px 12px;
            border-radius: 5px;
            font-size: 14px;
            cursor: pointer;
            border: none;
        }

        .btn-edit {
            background: #ffc107;
            color: #000;
        }

        .btn-delete {
            background: #dc3545;
            color: white;
        }

        .btn-add {
            margin-bottom: 15px;
            background: #198754;
            color: white;
            padding: 10px 18px;
            font-size: 15px;
            border-radius: 6px;
            cursor: pointer;
            border: none;
        }


        label {
            font-weight: bold;
            display: block;
            margin-top: 20px;
        }

        input[type="text"],
        input[type="number"],
        textarea {
            width: 100%;
            padding: 12px;
            font-size: 16px;
            margin-top: 8px;
            border-radius: 6px;
            border: 1px solid #ccc;
            box-sizing: border-box;
        }

        textarea {
            height: 350px;
            font-family: monospace;
            white-space: pre;
        }


        .message {
            margin-top: 20px;
            color: red;
            font-weight: bold;
        }

        .back-link {
            display: inline-block;
            margin-bottom: 15px;
            color: #0d6efd;
            text-decoration: none;
            font-size: 15px;
        }
        .containerAddTest {
            max-width: 800px;
            margin: auto;
            background: white;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.2);
        }

        .test-card {
            background: white;
            border-radius: 12px;
            padding: 20px;
            margin: 18px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;

        }

        .test-info {
            font-size: 18px;
        }

        .test-name {
            font-weight: bold;
            font-size: 20px;
            margin-bottom: 6px;
        }

        .duration {
            color: #666;
            font-size: 15px;
        }

        .brand{
            width: 10%;
            align-self: center;
            position: absolute;
            left: 40%;
            top: 0;
        }
        .brand img{
            width: 100%;
        }

        .logoBrand{
            width: 100%;
            display: flex;
            justify-content: center;
        }

        .logoBrand img{
            width: 15%;
        }