:root {
    --primary: #003399;
    --secondary: #FFD700;
    --background: #f5f7fa;
    --text: #333;
    --light: #fff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    color: var(--primary);
    margin-bottom: 10px;
}

.screen {
    background: var(--light);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 16px;
}

button {
    background-color: var(--primary);
    color: var(--light);
    border: none;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
    width: 100%;
}

button:hover {
    background-color: #002266;
}

button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

#question-container {
    margin: 20px 0;
    font-size: 18px;
    font-weight: bold;
}

#options-container {
    margin: 20px 0;
}

.option {
    background: var(--light);
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    padding: 12px;
    margin: 10px 0;
    cursor: pointer;
    transition: all 0.2s;
}

.option:hover {
    background: #f0f0f0;
    border-color: var(--primary);
}

.option.selected {
    background: #e6f0ff;
    border-color: var(--primary);
}

.progress-container {
    margin-bottom: 20px;
    height: 10px;
    background: #eee;
    border-radius: 5px;
    overflow: hidden;
}

#progress-bar {
    height: 100%;
    background: var(--primary);
    width: 0%;
    transition: width 0.3s;
}

#progress-text {
    display: block;
    text-align: right;
    font-size: 14px;
    color: #666;
    margin-top: 5px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background: var(--primary);
    color: var(--light);
}

tr:nth-child(even) {
    background: #f2f2f2;
}

@media (max-width: 600px) {
    .container {
        padding: 10px;
    }

    .screen {
        padding: 20px;
    }
}