/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
}

/* Survey Card */
.survey-card {
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.survey-card h1 {
    color: #333;
    margin-bottom: 20px;
    font-size: 28px;
    text-align: center;
}

.email-display {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    font-size: 14px;
}

.email-display strong {
    color: #667eea;
    font-weight: 600;
}

.intro-text {
    text-align: center;
    color: #666;
    margin-bottom: 25px;
    font-size: 16px;
    line-height: 1.6;
}

/* Form Styles */
.survey-form {
    margin-top: 20px;
}

.form-group {
    margin-bottom: 30px;
}

.question {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
    font-size: 16px;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-help {
    display: block;
    margin-top: 6px;
    font-size: 13px;
    color: #666;
}

/* Radio Options */
.radio-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.radio-option {
    display: flex;
    align-items: center;
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #fafafa;
}

.radio-option:hover {
    border-color: #667eea;
    background: #f0f4ff;
}

.radio-option input[type="radio"] {
    margin-right: 12px;
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: #667eea;
}

.radio-label {
    font-size: 16px;
    color: #333;
    cursor: pointer;
    flex: 1;
}

.radio-option input[type="radio"]:checked + .radio-label {
    font-weight: 600;
    color: #667eea;
}

.radio-option:has(input[type="radio"]:checked) {
    border-color: #667eea;
    background: #f0f4ff;
}

/* Buttons */
.form-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

.btn {
    padding: 14px 32px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #f0f0f0;
    color: #333;
}

.btn-secondary:hover {
    background: #e0e0e0;
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-error {
    background: #fee;
    color: #c33;
    border: 1px solid #fcc;
}

/* Success Page */
.success-card {
    text-align: center;
}

.success-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    font-weight: bold;
    animation: scaleIn 0.5s ease-out;
}

@keyframes scaleIn {
    from {
        transform: scale(0);
    }
    to {
        transform: scale(1);
    }
}

.success-message {
    font-size: 16px;
    color: #666;
    margin-bottom: 15px;
    line-height: 1.6;
}

/* Error Page */
.error-card {
    text-align: center;
}

.error-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: #f44336;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    font-weight: bold;
}

.error-message {
    font-size: 16px;
    color: #666;
    margin-bottom: 20px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .survey-card {
        padding: 30px 20px;
    }
    
    .survey-card h1 {
        font-size: 24px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* File Input Styling */
input[type="file"] {
    padding: 10px;
    border: 2px dashed #e0e0e0;
    border-radius: 8px;
    background: #fafafa;
    cursor: pointer;
}

input[type="file"]:hover {
    border-color: #667eea;
    background: #f0f4ff;
}

input[type="file"]::file-selector-button {
    padding: 8px 16px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    margin-right: 12px;
}

input[type="file"]::file-selector-button:hover {
    background: #5568d3;
}