.fvc-calculator {
    --fvc-border: #d9e1ea;
    --fvc-text: #172033;
    --fvc-muted: #5e6b7a;
    --fvc-bg: #ffffff;
    --fvc-soft-bg: #f5f8fb;
    --fvc-accent: #1f6feb;
    --fvc-accent-hover: #185abc;
    --fvc-error: #b42318;

    max-width: 720px;
    color: var(--fvc-text);
    background: var(--fvc-bg);
    border: 1px solid var(--fvc-border);
    border-radius: 8px;
    padding: 24px;
    box-sizing: border-box;
}

.fvc-calculator * {
    box-sizing: border-box;
}

.fvc-calculator [hidden] {
    display: none !important;
}

.fvc-form {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    align-items: end;
}

.fvc-mode {
    display: flex;
    grid-column: 1 / -1;
    flex-wrap: wrap;
    gap: 10px;
}

.fvc-mode-option {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 42px;
    color: var(--fvc-text);
    background: var(--fvc-soft-bg);
    border: 1px solid var(--fvc-border);
    border-radius: 8px;
    padding: 9px 12px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
}

.fvc-mode-option input {
    margin: 0;
}

.fvc-field {
    display: grid;
    gap: 8px;
}

.fvc-field label {
    font-size: 14px;
    font-weight: 700;
    line-height: 1.35;
}

.fvc-field input,
.fvc-money-input {
    width: 100%;
}

.fvc-field input {
    min-height: 44px;
    color: var(--fvc-text);
    background: #ffffff;
    border: 1px solid var(--fvc-border);
    border-radius: 6px;
    padding: 10px 12px;
    font: inherit;
}

.fvc-money-input {
    position: relative;
}

.fvc-money-input span {
    position: absolute;
    top: 50%;
    left: 12px;
    color: var(--fvc-muted);
    transform: translateY(-50%);
    pointer-events: none;
}

.fvc-money-input input {
    padding-left: 28px;
}

.fvc-field input:focus {
    border-color: var(--fvc-accent);
    outline: 3px solid rgba(31, 111, 235, 0.16);
}

.fvc-submit {
    min-height: 44px;
    color: #ffffff;
    background: var(--fvc-accent);
    border: 0;
    border-radius: 6px;
    padding: 11px 18px;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.fvc-submit:hover,
.fvc-submit:focus {
    background: var(--fvc-accent-hover);
}

.fvc-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 12px;
    margin-top: 20px;
}

.fvc-result {
    display: grid;
    gap: 6px;
    min-width: 0;
    background: var(--fvc-soft-bg);
    border: 1px solid var(--fvc-border);
    border-radius: 8px;
    padding: 16px;
}

.fvc-result span {
    color: var(--fvc-muted);
    font-size: 14px;
}

.fvc-result strong {
    overflow-wrap: anywhere;
    font-size: clamp(22px, 4vw, 32px);
    line-height: 1.15;
}

.fvc-result-total strong {
    color: var(--fvc-accent);
}

.fvc-note {
    margin: 16px 0 0;
    color: var(--fvc-muted);
    font-size: 13px;
    line-height: 1.5;
}

.fvc-error {
    margin-top: 14px;
    color: var(--fvc-error);
    font-size: 14px;
    font-weight: 700;
}

@media (max-width: 760px) {
    .fvc-calculator {
        padding: 18px;
    }

    .fvc-form,
    .fvc-results {
        grid-template-columns: 1fr;
    }
}