.rxnprof-flowchart {
    --navy: #12122D;
    --navy-muted: #182744;
    --blue: #005AAA;
    --blue-light: #54C9EF;
    --white: #FFFFFF;
    --pill-bg: #FCE0C9;
    --pill-border: #F37C28;
    --accent-solid: #54C9EF;
    --connector-color: #005AAA;
    --dark-blue-20: #C7CFE9;
    --dark-blue-40: #98A9D6;
    --light-blue-20: #DEF2FB;
    --font: 'Segoe UI', 'Open Sans', Arial, sans-serif;

    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    font-family: var(--font);
    padding: 20px 20px 40px;
}

.rxnprof-flowchart .stage {
    width: 100%;
    max-width: 680px;
    background: var(--navy);
    border: 2px solid var(--navy);
    border-radius: 10px;
    color: var(--white);
    padding: 0;
    position: relative;
    overflow: visible;
}

.rxnprof-flowchart .stage--optional {
    background: var(--navy);
    background-clip: padding-box;
    border: 3px dashed var(--blue-light);
}

.rxnprof-flowchart .stage-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px 8px;
}

.rxnprof-flowchart .stage-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    min-width: 32px;
    border-radius: 50%;
    background: var(--blue);
    color: var(--white);
    font-weight: 700;
    font-size: 15px;
}

.rxnprof-flowchart .stage-badge--sm {
    font-size: 12px;
}

.rxnprof-flowchart .stage-title {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.rxnprof-flowchart .optional-tag {
    position: absolute;
    top: 10px;
    right: 14px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--blue-light);
    background: rgba(84, 201, 239, 0.15);
    padding: 2px 8px;
    border-radius: 4px;
}

.rxnprof-flowchart .stage-body {
    padding: 4px 18px 14px 62px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--dark-blue-20);
}

.rxnprof-flowchart .stage-desc {
    margin-bottom: 8px;
}

.rxnprof-flowchart .stage-result {
    font-size: 13px;
    color: var(--dark-blue-40);
    margin-top: 4px;
}

.rxnprof-flowchart .substages {
    padding: 6px 18px 12px 62px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.rxnprof-flowchart .substage {
    background: var(--navy-muted);
    border-left: 4px solid var(--accent-solid);
    border-radius: 0 6px 6px 0;
    padding: 10px 14px;
}

.rxnprof-flowchart .substage--optional {
    border-left: 4px dashed var(--blue-light);
}

.rxnprof-flowchart .substage-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 3px;
}

.rxnprof-flowchart .substage-desc {
    font-size: 13px;
    color: var(--dark-blue-40);
}

.rxnprof-flowchart .annotations {
    padding: 6px 18px 14px 62px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.rxnprof-flowchart .annotations--compact {
    padding: 6px 0 0 0;
}

.rxnprof-flowchart .pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 12px;
    max-width: 100%;
    overflow-wrap: anywhere;
}

.rxnprof-flowchart .pill--file {
    background: var(--pill-bg);
    border: 1px solid var(--pill-border);
    color: #7A3E14;
}

.rxnprof-flowchart .pill--no-margin {
    margin: 0;
}

.rxnprof-flowchart .connector {
    width: 2px;
    height: 36px;
    background: var(--connector-color);
    position: relative;
}

.rxnprof-flowchart .connector::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: -4px;
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 6px solid var(--connector-color);
}

.rxnprof-flowchart .condition {
    font-size: 13px;
    font-style: italic;
    color: var(--blue);
    text-align: center;
    padding: 4px 14px;
    background: var(--light-blue-20);
    border-radius: 14px;
    margin: 2px 0;
}

.rxnprof-flowchart .connector-short {
    width: 2px;
    height: 18px;
    background: var(--connector-color);
}

.rxnprof-flowchart .parallel {
    width: 100%;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    position: relative;
}

.rxnprof-flowchart .parallel::before {
    content: '';
    position: absolute;
    top: 0;
    left: calc((100% - 40px) / 6);
    right: calc((100% - 40px) / 6);
    border-top: 2px solid var(--connector-color);
}

.rxnprof-flowchart .parallel-col {
    flex: 1 1 0%;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.rxnprof-flowchart .parallel-col .connector {
    display: block;
    width: 2px;
    height: 12px;
    background: var(--connector-color);
    position: static;
}

.rxnprof-flowchart .parallel-col .connector::after {
    display: none;
}

.rxnprof-flowchart .parallel-col .stage {
    width: 100%;
    max-width: none;
}

.rxnprof-flowchart .input-block {
    background: var(--light-blue-20);
    border: 2px solid var(--blue);
    border-radius: 24px;
    padding: 10px 28px;
    font-size: 15px;
    font-weight: 700;
    color: var(--navy);
    letter-spacing: 0.5px;
    text-align: center;
}

.rxnprof-flowchart .input-block-sub {
    font-size: 12px;
    font-weight: 400;
}

.rxnprof-flowchart .legend {
    width: 100%;
    max-width: 680px;
    background: var(--white);
    border: 1px solid var(--dark-blue-20);
    border-radius: 8px;
    padding: 14px 20px;
    margin-bottom: 28px;
    font-size: 13px;
    color: var(--navy);
}

.rxnprof-flowchart .legend-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 10px;
}

.rxnprof-flowchart .legend-items {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 28px;
}

.rxnprof-flowchart .legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.rxnprof-flowchart .legend-swatch {
    flex-shrink: 0;
    border-radius: 4px;
}

.rxnprof-flowchart .legend-swatch--stage {
    width: 28px;
    height: 18px;
    background: transparent;
    border: 2px solid var(--navy);
}

.rxnprof-flowchart .legend-swatch--optional {
    width: 28px;
    height: 18px;
    background: transparent;
    border: 3px dashed var(--blue-light);
}

.rxnprof-flowchart .legend-swatch--substage {
    width: 6px;
    height: 18px;
    border-left: 4px solid var(--accent-solid);
}

.rxnprof-flowchart .legend-swatch--substage-opt {
    width: 6px;
    height: 18px;
    border-left: 4px dashed var(--blue-light);
}

.rxnprof-flowchart .legend-swatch--condition {
    padding: 1px 8px;
    font-size: 11px;
    font-style: italic;
    color: var(--blue);
    background: var(--light-blue-20);
    border-radius: 10px;
}

.rxnprof-flowchart .text-center {
    text-align: center;
}

@media (max-width: 720px) {
    .rxnprof-flowchart .parallel {
        flex-direction: column;
        align-items: center;
        padding-top: 0;
    }
    .rxnprof-flowchart .parallel::before {
        display: none;
    }
    .rxnprof-flowchart .parallel-col {
        max-width: 680px;
        width: 100%;
    }
    .rxnprof-flowchart .parallel-col .connector {
        height: 36px;
    }
    .rxnprof-flowchart .parallel-col .connector::after {
        display: block;
    }
}

@media print {
    .rxnprof-flowchart .stage { break-inside: avoid; }
}