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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

h1 {
    font-size: 2rem;
    font-weight: 300;
}

.back-btn {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 2px solid rgba(255,255,255,0.3);
    padding: 12px 24px;
    border-radius: 30px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.back-btn:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

.back-btn:active {
    transform: translateY(-1px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.survey-form, .preview {
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.survey-form h2, .preview h2 {
    margin-bottom: 25px;
    color: #4a5568;
    font-size: 1.5rem;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2d3748;
}

input, select, textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    margin-bottom: 15px;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

#submitButton {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

#submitButton:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

#submitButton:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.preview-box {
    background: #f8fafc;
    padding: 20px;
    border-radius: 12px;
    border-left: 4px solid #667eea;
}

.preview-box p {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.responses {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

.responses h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #4a5568;
    font-size: 2rem;
}

#responseTable {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

th, td {
    padding: 15px 20px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
}

tr:hover {
    background: #f8fafc;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
        padding: 20px;
    }
    
    #responseTable {
        font-size: 0.9rem;
    }
    
    th, td {
        padding: 10px 12px;
    }
}