:root {
    --primary-color: #000000;
    --secondary-color: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --blur: blur(10px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

body {
    background: #000000;
    color: var(--secondary-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
}

.glass-container {
    background: var(--glass-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    padding: 30px;
    width: 100%;
    max-width: 500px;
    transition: transform 0.3s ease;
}

.glass-container:hover {
    transform: translateY(-5px);
}

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

.header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    background: linear-gradient(to right, #fff, #ccc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header p {
    font-size: 1rem;
    opacity: 0.8;
}

.questionnaire-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    opacity: 0.9;
}

.form-group input {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    padding: 12px 15px;
    color: var(--secondary-color);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
}

.submit-btn {
    background: #000;
    color: white;
    border: none;
    border-radius: 10px;
    padding: 15px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.submit-btn:hover {
    background: #000000d7;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.success-message {
    text-align: center;
    padding: 40px;
}

.success-message h1 {
    font-size: 2rem;
    margin-bottom: 20px;
    animation: fadeIn 1s ease-in-out;
}

.success-message p {
    font-size: 1.2rem;
    opacity: 0.9;
    animation: fadeIn 1.5s ease-in-out;
}

.animation-circle {
    width: 100px;
    height: 100px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    margin: 30px auto;
    position: relative;
    animation: pulse 2s infinite;
}

.animation-circle::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    top: -6px;
    left: -6px;
    animation: pulse 2s infinite 0.5s;
}

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

@keyframes pulse {
    0% { transform: scale(0.95); opacity: 0.7; }
    70% { transform: scale(1.1); opacity: 0.3; }
    100% { transform: scale(0.95); opacity: 0.7; }
}

/* Responsive design */
@media (max-width: 600px) {
    .glass-container {
        padding: 20px;
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
    
    .header p {
        font-size: 0.9rem;
    }
    
    .form-group input {
        padding: 10px 12px;
    }
    
    .submit-btn {
        padding: 12px;
    }
}