.page-header {
    margin: 24px 0 10px;
}

.page-header h1 {
    margin: 4px 0 8px;
}

.calculator {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 16px;
    margin-top: 12px;
}

.calculator-form {
    padding: 18px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: grid;
    gap: 14px;
}

.field {
    display: grid;
    gap: 6px;
}

.field.two-col {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

label {
    font-weight: 700;
}

input {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    font-size: 16px;
}

input:focus {
    outline: 2px solid rgba(37, 99, 235, 0.35);
}

.hint {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 13px;
}

.calculator-result {
    padding: 18px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin-top: 10px;
}

.stat {
    padding: 12px;
    border-radius: 12px;
    background: rgba(37, 99, 235, 0.08);
}

.stat .label {
    color: var(--muted);
    font-size: 13px;
    margin: 0 0 4px;
}

.stat .value {
    font-weight: 800;
    font-size: 18px;
    margin: 0;
}

.error {
    color: #fca5a5;
    min-height: 18px;
}