body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.card {
    border: none;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.btn-primary {
    background: linear-gradient(45deg, #667eea, #764ba2);
    border: none;
    border-radius: 10px;
    transition: transform 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.form-range {
    -webkit-appearance: none;
    appearance: none;
    background: linear-gradient(to right, #667eea 0%, #667eea 32%, #dee2e6 32%, #dee2e6 100%);
    height: 8px;
    border-radius: 4px;
    outline: none;
}

.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    background: #667eea;
    height: 20px;
    width: 20px;
    border-radius: 50%;
    border: 3px solid #fff;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    cursor: pointer;
}

.form-range::-moz-range-thumb {
    background: #667eea;
    height: 20px;
    width: 20px;
    border: 3px solid #fff;
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    cursor: pointer;
    -moz-appearance: none;
}

.form-range::-moz-range-track {
    background: transparent;
    height: 8px;
    border: none;
}

#password {
    font-family: 'Courier New', monospace;
    font-weight: bold;
    letter-spacing: 1px;
}

.form-check-input:checked {
    background-color: #667eea;
    border-color: #667eea;
}