.invisalign-calculator-container {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 800px;
    margin: 2rem auto;
    color: #fff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.calculator-wrapper {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px); /* For Safari */
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.calculator-header {
    text-align: center;
    margin-bottom: 2rem;
}

.calculator-header h2 {
    font-size: 2.5rem;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.clock {
    font-size: 1.5rem;
    font-weight: 300;
    margin-top: 0.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.calculator-body {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .calculator-body {
        grid-template-columns: 1fr 1fr;
    }
}

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

.form-group label {
    margin-bottom: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
}

.form-group input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 10px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 5px;
    outline: none;
    cursor: pointer;
    transition: background 0.3s;
}

.form-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: #fff;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
    transition: transform 0.2s;
}

.form-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: #fff;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
}

.form-group input[type="range"]:hover {
    background: rgba(255, 255, 255, 0.5);
}

.form-group input[type="range"]:active::-webkit-slider-thumb {
    transform: scale(1.2);
}

.form-group span {
    margin-top: 0.5rem;
    font-size: 1.2rem;
    font-weight: 700;
    text-align: center;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.calculator-footer {
    margin-top: 2rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    text-align: center;
}

@media (min-width: 768px) {
    .calculator-footer {
        grid-template-columns: 1fr 1fr;
    }
}

.results, .total-cost {
    background: rgba(0, 0, 0, 0.2);
    padding: 1.5rem;
    border-radius: 10px;
}

.results h3, .total-cost h3 {
    margin-top: 0;
    font-size: 1.2rem;
    font-weight: 500;
}

.results p, .total-cost p {
    margin-bottom: 0;
    font-size: 2.5rem;
    font-weight: 700;
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.8);
}