body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
    background: #F5F7FA;
    color: #0F172A;
}

.container {
    max-width: 800px;
    margin: auto;
    padding: 60px 20px;
    text-align: center;
}

h1 {
    font-size: 34px;
    font-weight: 700;
    margin-bottom: 10px;
}

p {
    color: #64748B;
    font-size: 16px;
}

.card {
    background: white;
    border-radius: 16px;
    padding: 24px;
    margin-top: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

input, select {
    width: 100%;
    padding: 14px;
    border-radius: 12px;
    border: 1px solid #E2E8F0;
    font-size: 16px;
    margin-top: 10px;
}

button {
    background: #2563EB;
    color: white;
    border: none;
    padding: 14px 20px;
    border-radius: 12px;
    font-size: 16px;
    margin-top: 20px;
    cursor: pointer;
    width: 100%;
}

button:hover {
    background: #1D4ED8;
}

.option-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 20px;
}

.option {
    padding: 14px;
    border-radius: 12px;
    border: 1px solid #E2E8F0;
    cursor: pointer;
}

.option:hover {
    border-color: #2563EB;
}

.big-number {
    font-size: 42px;
    font-weight: 700;
    margin: 20px 0;
}

.muted {
    color: #64748B;
}