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

body {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: #f5f7fa;
    color: #1a1a2e;
    padding: 2rem 1rem;
    min-height: 100vh;
}

.calculator {
    max-width: 480px;
    margin: 0 auto;
    background: white;
    border-radius: 24px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
    padding: 1.5rem;
}

h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

.field {
    margin-bottom: 1.25rem;
}

label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: #334155;
    font-size: 0.875rem;
}

input,
select {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 1px solid #cbd5e1;
    border-radius: 12px;
    font-size: 1rem;
    background: #ffffff;
}

input:focus,
select:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.results {
    background: #f8fafc;
    border-radius: 20px;
    padding: 1.25rem;
    margin-top: 1.5rem;
    border: 1px solid #e2e8f0;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.75rem 0;
    border-bottom: 1px solid #e2e8f0;
}

.result-item:last-child {
    border-bottom: none;
}

.label {
    font-weight: 500;
    color: #475569;
}

.value {
    font-weight: 700;
    font-size: 1.25rem;
    color: #0f172a;
}