.nbk-calculator,
.nbk-calculator * {
    box-sizing: border-box;
}

.nbk-calculator {
    --nbk-blue: #112b60;
    --nbk-blue-mid: #21499a;
    --nbk-blue-soft: #e9eef9;
    --nbk-red: #e30613;
    --nbk-red-dark: #b90010;
    --nbk-ink: #17202d;
    --nbk-muted: #657083;
    --nbk-line: #dce2eb;
    --nbk-paper: #f4f6fa;
    width: 100%;
    max-width: 1220px;
    margin: 32px auto;
    color: var(--nbk-ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}

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

.nbk-head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 520px);
    gap: 40px;
    align-items: end;
    margin-bottom: 28px;
}

.nbk-head h2,
.nbk-form-head h3,
.nbk-result h3,
.nbk-assumptions h4 {
    margin: 0;
    color: inherit;
}

.nbk-head h2 {
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1;
    letter-spacing: -.045em;
}

.nbk-head > p:last-child {
    margin: 0;
    color: var(--nbk-muted);
    font-size: 1rem;
}

.nbk-kicker {
    grid-column: 1 / -1;
    margin: 0 0 -24px;
    color: var(--nbk-red);
    font-size: .8rem;
    font-weight: 800;
    letter-spacing: .12em;
    text-transform: uppercase;
}

.nbk-tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 14px;
}

.nbk-tabs-1 {
    grid-template-columns: 1fr;
}

.nbk-tabs-2 {
    grid-template-columns: repeat(2, 1fr);
}

.nbk-tab {
    min-height: 70px;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid var(--nbk-line) !important;
    border-radius: 14px;
    background: #fff !important;
    color: var(--nbk-ink) !important;
    padding: 13px 16px;
    font: inherit;
    text-align: left;
    cursor: pointer;
    transition: .18s ease;
    box-shadow: none !important;
    opacity: 1 !important;
    text-transform: none !important;
}

.nbk-tab:hover {
    border-color: var(--nbk-blue-mid) !important;
    background: var(--nbk-blue-soft) !important;
    color: var(--nbk-blue) !important;
    transform: translateY(-1px);
}

.nbk-tab.is-active {
    border-color: var(--nbk-blue) !important;
    background: var(--nbk-blue) !important;
    color: #fff !important;
}

.nbk-tab span {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    flex: 0 0 38px;
    border-radius: 10px;
    background: var(--nbk-blue-soft);
    color: var(--nbk-blue-mid);
    font-size: .75rem;
    font-weight: 850;
}

.nbk-tab.is-active span {
    background: var(--nbk-red);
    color: #fff;
}

.nbk-tab strong {
    font-size: .94rem;
    color: inherit !important;
}

.nbk-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(380px, .95fr);
    overflow: hidden;
    border-radius: 22px;
    background: #fff;
    box-shadow: 0 22px 56px rgba(17, 43, 96, .13);
}

.nbk-form,
.nbk-result {
    min-width: 0;
    padding: clamp(24px, 4vw, 44px);
}

.nbk-form-head {
    margin-bottom: 24px;
}

.nbk-form-head h3 {
    font-size: 1.45rem;
}

.nbk-form-head p {
    margin: 5px 0 0;
    color: var(--nbk-muted);
    font-size: .9rem;
}

.nbk-grid {
    display: grid;
    gap: 14px;
    margin-bottom: 18px;
}

.nbk-grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.nbk-grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

/* Auswahlfelder mit langen Texten bleiben vollständig lesbar. */
@media (min-width: 641px) {
    .nbk-grid-keller-details,
    .nbk-grid-paving-details,
    .nbk-grid-slab-details {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .nbk-grid-keller-details > label:last-child,
    .nbk-grid-paving-details > label:last-child,
    .nbk-grid-slab-details > label:last-child {
        grid-column: 1 / -1;
        justify-self: center;
        width: calc(50% - 7px);
    }
}

.nbk-grid > label {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 0;
    margin: 0 !important;
    text-align: left !important;
}

.nbk-field-caption {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 8px;
    width: 100%;
    min-height: 38px;
    color: #394456;
    line-height: 1.25;
}

.nbk-field-caption small {
    flex: 0 0 auto;
    margin-left: auto;
    padding: 0 0 1px;
    line-height: 1.25;
}

.nbk-grid > label > input[type="number"],
.nbk-grid > label > select {
    width: 100%;
    min-width: 0;
    margin: 0 !important;
}

.nbk-form label {
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: #394456;
    font-size: .875rem;
    font-weight: 750;
}

.nbk-form label small {
    color: #8690a0;
    font-weight: 600;
}

.nbk-form input[type="number"],
.nbk-form select {
    width: 100%;
    height: 50px;
    border: 1px solid var(--nbk-line);
    border-radius: 10px;
    background: #fbfcfe;
    color: var(--nbk-ink);
    padding: 0 13px;
    font: inherit;
    outline: none;
}

.nbk-form input:focus,
.nbk-form select:focus {
    border-color: var(--nbk-blue-mid);
    box-shadow: 0 0 0 3px rgba(33, 73, 154, .12);
}

.nbk-options {
    overflow: hidden;
    margin: 4px 0 18px;
    border: 1px solid var(--nbk-line);
    border-radius: 12px;
}

.nbk-options label {
    display: grid;
    grid-template-columns: 20px 1fr;
    align-items: center;
    gap: 11px;
    min-height: 60px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--nbk-line);
    cursor: pointer;
}

.nbk-options label:last-child {
    border-bottom: 0;
}

.nbk-options input {
    width: 18px;
    height: 18px;
    accent-color: var(--nbk-blue-mid);
}

.nbk-options label span {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.nbk-options label strong {
    font-size: .9rem;
}

.nbk-options label small {
    color: var(--nbk-muted);
    font-size: .78rem;
}

.nbk-submit {
    width: 100%;
    min-height: 54px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 0 !important;
    border-radius: 11px;
    background: var(--nbk-red) !important;
    color: #fff !important;
    padding: 0 19px;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 0 12px 25px rgba(227, 6, 19, .24) !important;
}

.nbk-submit:hover {
    background: var(--nbk-red-dark) !important;
    color: #fff !important;
}

.nbk-submit:disabled {
    opacity: .7;
    cursor: wait;
}

.nbk-result {
    min-height: 620px;
    overflow-anchor: none;
    background: var(--nbk-blue);
    color: #fff;
}

.nbk-result-empty {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.nbk-result-empty > span {
    display: grid;
    place-items: center;
    width: 64px;
    height: 64px;
    margin-bottom: 20px;
    border-radius: 18px;
    background: rgba(255, 255, 255, .1);
    color: #fff;
    font-size: 1.65rem;
    font-weight: 850;
}

.nbk-result-empty h3 {
    font-size: 1.5rem;
}

.nbk-result-empty p {
    max-width: 350px;
    margin: 9px 0 0;
    color: #bec9df;
}

.nbk-result-label {
    margin: 0 0 13px;
    color: #bec9df;
    font-size: .78rem;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.nbk-prices {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 10px;
}

.nbk-price-card {
    display: flex;
    flex-direction: column;
    gap: 5px;
    border: 1px solid rgba(255, 255, 255, .15);
    border-radius: 14px;
    background: rgba(255, 255, 255, .07);
    padding: 17px;
}

.nbk-price-card > strong {
    color: #dbe4f5;
    font-size: .8rem;
    letter-spacing: .05em;
    text-transform: uppercase;
}

.nbk-gross {
    font-size: clamp(1.3rem, 2.8vw, 1.85rem);
    font-weight: 850;
    letter-spacing: -.025em;
}

.nbk-price-card small {
    color: #aebbd2;
    font-size: .76rem;
}

.nbk-tax-note {
    margin: 9px 0 22px;
    color: #aebbd2;
    font-size: .76rem;
}

.nbk-quantities {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.nbk-quantities div {
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 10px;
    background: rgba(255, 255, 255, .05);
}

.nbk-quantities span,
.nbk-quantities strong {
    display: block;
}

.nbk-quantities span {
    margin-bottom: 4px;
    color: #aebbd2;
    font-size: .72rem;
}

.nbk-quantities strong {
    font-size: .95rem;
}

.nbk-formula {
    margin: 8px 0 20px;
    color: #9eacc6;
    font-size: .76rem;
    text-align: right;
}

.nbk-assumptions {
    padding-top: 19px;
    border-top: 1px solid rgba(255, 255, 255, .13);
}

.nbk-assumptions h4 {
    font-size: .95rem;
}

.nbk-assumptions ul {
    margin: 10px 0 0;
    padding-left: 18px;
    color: #c4cde0;
    font-size: .8rem;
}

.nbk-assumptions li + li {
    margin-top: 6px;
}

.nbk-disclaimer {
    margin-top: 18px;
    border-radius: 11px;
    background: rgba(255, 255, 255, .07);
    padding: 14px;
}

.nbk-disclaimer strong {
    font-size: .82rem;
}

.nbk-disclaimer p {
    margin: 5px 0 0;
    color: #b8c4d9;
    font-size: .77rem;
}

.nbk-contact {
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 16px;
    width: 100%;
    border: 2px solid #fff !important;
    border-radius: 10px;
    background: var(--nbk-red) !important;
    color: #fff !important;
    font: inherit;
    font-weight: 800;
    text-decoration: none !important;
    cursor: pointer;
    opacity: 1 !important;
    visibility: visible !important;
    box-shadow: 0 10px 24px rgba(0, 0, 0, .24) !important;
    appearance: none;
    -webkit-appearance: none;
}

.nbk-contact:hover {
    background: var(--nbk-red-dark) !important;
    color: #fff !important;
    border-color: #fff !important;
    transform: translateY(-1px);
}

.nbk-contact:focus-visible {
    outline: 3px solid #fff;
    outline-offset: 3px;
}

.nbk-request {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, .16);
}

.nbk-request h4 {
    margin: 0;
    color: #fff;
    font-size: 1.1rem;
}

.nbk-request > p {
    margin: 5px 0 16px;
    color: #bec9df;
    font-size: .8rem;
}

.nbk-request-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.nbk-request label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    color: #dbe4f5;
    font-size: .78rem;
    font-weight: 700;
}

.nbk-request-wide {
    grid-column: 1 / -1;
}

.nbk-field-label {
    display: block;
}

.nbk-required {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 15px;
    height: 15px;
    border-radius: 50%;
    background: #fff;
    color: var(--nbk-red);
    font-size: .75rem;
    font-weight: 900;
    line-height: 1;
}

.nbk-required-note {
    margin: 8px 0 0;
    color: #dbe4f5;
    font-size: .74rem;
}

.nbk-request input[type="text"],
.nbk-request input[type="email"],
.nbk-request input[type="tel"],
.nbk-request input[type="file"],
.nbk-request textarea {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, .22);
    border-radius: 9px;
    background: #fff;
    color: var(--nbk-ink);
    padding: 11px 12px;
    font: inherit;
}

.nbk-request input[type="file"] {
    cursor: pointer;
}

.nbk-request input[type="file"]::file-selector-button {
    margin-right: 10px;
    border: 0;
    border-radius: 7px;
    background: var(--nbk-red);
    color: #fff;
    padding: 8px 11px;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.nbk-upload-note {
    color: #bec9df !important;
    font-size: .72rem !important;
    font-weight: 500 !important;
}

.nbk-request textarea {
    min-height: 92px;
    resize: vertical;
}

.nbk-request input:focus,
.nbk-request textarea:focus {
    outline: 3px solid rgba(255, 255, 255, .18);
    border-color: #fff;
}

.nbk-privacy {
    display: grid !important;
    grid-template-columns: 18px 1fr;
    align-items: start;
    gap: 9px !important;
    margin-top: 14px;
    font-weight: 500 !important;
    line-height: 1.45;
}

.nbk-privacy input {
    width: 17px;
    height: 17px;
    margin: 2px 0 0;
    accent-color: var(--nbk-red);
}

.nbk-privacy a,
.nbk-contact-link {
    color: #fff !important;
    text-decoration: underline !important;
}

.nbk-honeypot {
    position: absolute !important;
    left: -10000px !important;
    width: 1px !important;
    height: 1px !important;
    overflow: hidden !important;
}

.nbk-request-submit {
    width: 100%;
    min-height: 49px;
    margin-top: 14px;
    border: 0 !important;
    border-radius: 9px;
    background: var(--nbk-red) !important;
    color: #fff !important;
    padding: 10px 16px;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.nbk-request-submit:hover {
    background: var(--nbk-red-dark) !important;
    color: #fff !important;
}

.nbk-request-submit:disabled {
    opacity: .72;
    cursor: wait;
}

.nbk-request-status {
    margin: 14px 0 0;
    border-radius: 9px;
    padding: 12px;
    font-size: .82rem;
    font-weight: 700;
}

.nbk-request-status.is-success {
    background: #e8f7ed;
    color: #175c2d;
}

.nbk-request-status.is-error {
    background: var(--nbk-red);
    color: #fff;
}

.nbk-contact-link {
    display: block;
    margin-top: 13px;
    font-size: .78rem;
    text-align: center;
}

.nbk-error {
    margin: 0;
    border-radius: 10px;
    background: var(--nbk-red);
    color: #fff;
    padding: 13px;
}

.nbk-footnote {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 15px 4px 0;
    color: var(--nbk-muted);
    font-size: .76rem;
}

@media (max-width: 920px) {
    .nbk-head {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .nbk-kicker {
        margin-bottom: 0;
    }
    .nbk-tabs,
    .nbk-workspace {
        grid-template-columns: 1fr;
    }
    .nbk-result {
        min-height: 420px;
    }
}

@media (max-width: 640px) {
    .nbk-calculator {
        margin: 18px auto;
    }
    .nbk-head h2 {
        font-size: 2.35rem;
    }
    .nbk-tab {
        min-height: 58px;
        padding: 9px 11px;
    }
    .nbk-tab span {
        width: 34px;
        height: 34px;
        flex-basis: 34px;
    }
    .nbk-form,
    .nbk-result {
        padding: 24px 17px;
    }
    .nbk-grid-3,
    .nbk-grid-2 {
        grid-template-columns: 1fr;
    }
    .nbk-field-caption {
        min-height: 24px;
    }
    .nbk-quantities {
        grid-template-columns: 1fr 1fr;
    }
    .nbk-request-grid {
        grid-template-columns: 1fr;
    }
    .nbk-request-wide {
        grid-column: auto;
    }
    .nbk-quantities div:last-child {
        grid-column: 1 / -1;
    }
    .nbk-footnote {
        flex-direction: column;
        gap: 4px;
    }
}