* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 600px;
    min-height: 500px;
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

header p {
    opacity: 0.9;
}

.screen {
    display: none;
    padding: 40px;
    text-align: center;
}

.screen.active {
    display: block;
}

.quiz-icon, .result-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    display: block;
}

.start-content {
    padding: 40px 0;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    margin-top: 20px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #f8f9fa;
    color: #333;
    border: 2px solid #667eea;
    padding: 12px 30px;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 30px;
}

.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary:not(:disabled):hover {
    background: #667eea;
    color: white;
}

.progress-bar {
    background: #f0f0f0;
    border-radius: 10px;
    height: 8px;
    margin-bottom: 30px;
    overflow: hidden;
}

.progress {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100%;
    width: 0%;
    transition: width 0.3s;
}

#question-text {
    font-size: 1.4rem;
    margin-bottom: 30px;
    color: #333;
    line-height: 1.5;
}

.options-grid {
    display: grid;
    gap: 15px;
    margin-bottom: 20px;
}

.option-btn {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    padding: 15px 20px;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s;
    text-align: left;
    font-size: 1rem;
}

.option-btn:hover {
    border-color: #667eea;
    transform: translateX(5px);
}

.option-btn.selected {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

#result-content {
    padding: 20px 0;
}

#result-title {
    color: #333;
    margin-bottom: 20px;
    font-size: 2rem;
}

#result-description {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #666;
    margin-bottom: 30px;
}

@media (max-width: 600px) {
    .container {
        margin: 10px;
        border-radius: 15px;
    }
    
    header {
        padding: 20px;
    }
    
    .screen {
        padding: 30px 20px;
    }
    
    #question-text {
        font-size: 1.2rem;
    }
}