.nb-root {
    --nb-bg: #f3f1eb;
    --nb-card: rgba(255, 255, 255, 0.88);
    --nb-border: rgba(24, 38, 56, 0.08);
    --nb-text: #223042;
    --nb-muted: #6f7884;
    --nb-accent: #415d78;
    --nb-accent-strong: #29445c;
    --nb-highlight: #eef3f7;
    color: var(--nb-text);
    font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
}

.nb-shell {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(300px, 0.7fr);
    gap: 24px;
    padding: 24px;
    background:
        radial-gradient(circle at top left, rgba(111, 130, 148, 0.12), transparent 32%),
        linear-gradient(180deg, #f7f5f1 0%, var(--nb-bg) 100%);
    border-radius: 28px;
}

.nb-card {
    background: var(--nb-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--nb-border);
    border-radius: 24px;
    box-shadow: 0 20px 50px rgba(23, 35, 48, 0.07);
}

.nb-form-card {
    padding: 28px;
}

.nb-results-card {
    padding: 24px;
    position: sticky;
    top: 24px;
    height: fit-content;
}

.nb-card-head h2,
.nb-result-hero h3,
.nb-section h3 {
    margin: 0;
    color: #172536;
}

.nb-card-head p,
.nb-caption,
.nb-note,
.nb-status {
    color: var(--nb-muted);
}

.nb-eyebrow {
    margin: 0 0 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.75rem;
    color: var(--nb-accent);
    font-weight: 700;
}

.nb-form {
    display: grid;
    gap: 26px;
    margin-top: 24px;
}

.nb-section {
    display: grid;
    gap: 16px;
    padding-top: 8px;
}

.nb-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.nb-field,
.nb-toggle {
    display: grid;
    gap: 8px;
}

.nb-field span,
.nb-toggle span {
    font-size: 0.92rem;
    font-weight: 600;
}

.nb-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    position: relative;
}

.nb-tooltip {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    outline: none;
}

.nb-tooltip-trigger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 999px;
    background: rgba(95, 120, 146, 0.14);
    color: var(--nb-accent);
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1;
    cursor: help;
}

.nb-tooltip-bubble {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    z-index: 20;
    width: min(260px, 70vw);
    padding: 12px 14px;
    border: 1px solid rgba(35, 53, 71, 0.08);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 18px 42px rgba(23, 35, 48, 0.12);
    color: var(--nb-muted);
    font-size: 0.88rem;
    font-weight: 400;
    line-height: 1.5;
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
    pointer-events: none;
}

.nb-tooltip-bubble::before {
    content: "";
    position: absolute;
    top: -7px;
    left: 16px;
    width: 14px;
    height: 14px;
    background: rgba(255, 255, 255, 0.96);
    border-left: 1px solid rgba(35, 53, 71, 0.08);
    border-top: 1px solid rgba(35, 53, 71, 0.08);
    transform: rotate(45deg);
}

.nb-tooltip:hover .nb-tooltip-bubble,
.nb-tooltip:focus-within .nb-tooltip-bubble,
.nb-tooltip:focus .nb-tooltip-bubble {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nb-tooltip:focus .nb-tooltip-trigger,
.nb-tooltip:focus-within .nb-tooltip-trigger {
    box-shadow: 0 0 0 3px rgba(65, 93, 120, 0.16);
}

.nb-field input,
.nb-field select {
    min-height: 52px;
    padding: 0 14px;
    border-radius: 14px;
    border: 1px solid rgba(35, 53, 71, 0.12);
    background: rgba(255, 255, 255, 0.95);
    color: var(--nb-text);
    font-size: 1rem;
}

.nb-field input:focus,
.nb-field select:focus {
    outline: 2px solid rgba(65, 93, 120, 0.16);
    border-color: var(--nb-accent);
}

.nb-toggle {
    align-items: center;
    grid-template-columns: 18px 1fr;
    min-height: 52px;
    padding: 0 14px;
    border: 1px solid rgba(35, 53, 71, 0.12);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.95);
}

.nb-button {
    appearance: none;
    border: 0;
    border-radius: 16px;
    min-height: 54px;
    padding: 0 22px;
    background: linear-gradient(135deg, var(--nb-accent) 0%, var(--nb-accent-strong) 100%);
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
}

.nb-actions {
    display: grid;
    gap: 10px;
}

.nb-result-hero {
    padding: 18px;
    border-radius: 20px;
    background: linear-gradient(180deg, #f8fafb 0%, var(--nb-highlight) 100%);
}

.nb-amount {
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: #142435;
}

.nb-breakdown {
    display: grid;
    gap: 10px;
    margin-top: 22px;
}

.nb-line {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(35, 53, 71, 0.08);
}

.nb-line-total {
    font-weight: 700;
}

.nb-note {
    margin-top: 20px;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(65, 93, 120, 0.07);
    font-size: 0.92rem;
}

@media (max-width: 960px) {
    .nb-shell {
        grid-template-columns: 1fr;
        padding: 16px;
    }

    .nb-results-card {
        position: static;
    }
}

@media (max-width: 640px) {
    .nb-form-card,
    .nb-results-card {
        padding: 18px;
        border-radius: 20px;
    }

    .nb-grid {
        grid-template-columns: 1fr;
    }

    .nb-tooltip-bubble {
        width: min(240px, calc(100vw - 72px));
    }
}