/* IEEE 754 guide hub and articles */
.ieee-guide-hub-page .guide-hub {
    margin-top: 12px;
    padding-top: 30px;
}

.ieee-learning-path {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin: 20px 0 36px;
    counter-reset: ieee-step;
}

.ieee-learning-path a {
    position: relative;
    display: flex;
    min-height: 86px;
    align-items: center;
    padding: 18px 16px 18px 48px;
    color: var(--text-color);
    background: var(--tool-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.ieee-learning-path a::before {
    counter-increment: ieee-step;
    content: counter(ieee-step);
    position: absolute;
    left: 15px;
    display: grid;
    width: 24px;
    height: 24px;
    place-items: center;
    color: #fff;
    background: var(--primary-color);
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
}

.ieee-learning-path a:hover {
    border-color: var(--primary-color);
    text-decoration: none;
}

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

.ieee-topic-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 22px;
    color: var(--text-color);
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 9px;
    transition: border-color .2s, transform .2s;
}

.ieee-topic-card:hover {
    border-color: var(--primary-color);
    text-decoration: none;
    transform: translateY(-2px);
}

.ieee-topic-card .topic-label {
    align-self: flex-start;
    padding: 3px 8px;
    color: var(--primary-color);
    background: rgba(0,86,179,.08);
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
}

.ieee-topic-card strong {
    font-size: 17px;
    line-height: 1.5;
}

.ieee-topic-card span:last-child {
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.65;
}

.ieee-tool-callout {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin: 42px 0;
    padding: 24px;
    background: linear-gradient(135deg, rgba(0,86,179,.08), rgba(0,86,179,.02));
    border: 1px solid rgba(0,86,179,.24);
    border-radius: 9px;
}

.ieee-tool-callout p {
    margin: 5px 0 0;
    color: var(--text-muted);
}

.ieee-tool-callout a {
    flex: 0 0 auto;
    padding: 11px 20px;
    color: #fff;
    background: var(--primary-color);
    border-radius: 999px;
    font-weight: 700;
}

.ieee-tool-callout a:hover {
    color: #fff;
    text-decoration: none;
}

.ieee-guide-article .ieee-table-scroll,
.ieee-guide-article .bit-layout-scroll {
    width: 100%;
    margin: 20px 0 32px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.ieee-guide-article .ieee-table {
    width: 100%;
    min-width: 620px;
    border: 1px solid var(--border-color);
    border-collapse: separate;
    border-spacing: 0;
    border-radius: 8px;
    background: var(--panel-bg);
    font-size: 14px;
}

.ieee-guide-article .ieee-table th,
.ieee-guide-article .ieee-table td {
    width: auto;
    padding: 11px 13px;
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    text-align: left;
    vertical-align: middle;
}

.ieee-guide-article .ieee-table th {
    background: var(--tool-bg);
    white-space: nowrap;
}

.ieee-guide-article .ieee-table tr > :last-child {
    border-right: 0;
}

.ieee-guide-article .ieee-table tbody tr:last-child > * {
    border-bottom: 0;
}

.ieee-guide-article .formula-box {
    margin: 20px 0;
    padding: 20px;
    overflow-x: auto;
    background: var(--tool-bg);
    border: 1px solid var(--border-color);
    border-left: 5px solid var(--primary-color);
    border-radius: 8px;
}

.ieee-guide-article .formula-box code {
    display: block;
    min-width: max-content;
    padding: 8px 0;
    background: transparent;
    font-size: 16px;
    text-align: center;
}

.ieee-guide-article .bit-layout {
    display: grid;
    min-width: 700px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: "Consolas", "SFMono-Regular", monospace;
}

.ieee-guide-article .bit-layout.float32 {
    grid-template-columns: 90px 220px 1fr;
}

.ieee-guide-article .bit-layout.float64 {
    grid-template-columns: 90px 240px 1fr;
}

.ieee-guide-article .bit-segment {
    padding: 18px 14px;
    border-right: 1px solid var(--border-color);
    text-align: center;
}

.ieee-guide-article .bit-segment:last-child {
    border-right: 0;
}

.ieee-guide-article .bit-segment strong,
.ieee-guide-article .bit-segment span {
    display: block;
}

.ieee-guide-article .bit-segment span {
    margin-top: 5px;
    font-size: 12px;
}

.ieee-guide-article .sign-segment {
    background: rgba(220,53,69,.12);
}

.ieee-guide-article .exponent-segment {
    background: rgba(255,193,7,.15);
}

.ieee-guide-article .fraction-segment {
    background: rgba(0,86,179,.10);
}

.ieee-guide-article .calculation-steps {
    margin: 20px 0 32px;
    padding: 0;
    list-style: none;
    counter-reset: calc-step;
}

.ieee-guide-article .calculation-steps li {
    position: relative;
    margin: 0 0 12px;
    padding: 16px 18px 16px 54px;
    background: var(--tool-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.ieee-guide-article .calculation-steps li::before {
    counter-increment: calc-step;
    content: counter(calc-step);
    position: absolute;
    top: 15px;
    left: 16px;
    display: grid;
    width: 25px;
    height: 25px;
    place-items: center;
    color: #fff;
    background: var(--primary-color);
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
}

.ieee-guide-article .result-box {
    margin: 24px 0;
    padding: 18px 20px;
    background: rgba(40,167,69,.08);
    border: 1px solid rgba(40,167,69,.35);
    border-radius: 8px;
}

.ieee-guide-article .warning-box {
    margin: 24px 0;
    padding: 18px 20px;
    color: var(--warning-text);
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    border-radius: 8px;
}

.ieee-guide-article .warning-box p:last-child,
.ieee-guide-article .result-box p:last-child {
    margin-bottom: 0;
}

@media (max-width: 760px) {
    .ieee-learning-path {
        grid-template-columns: 1fr 1fr;
    }

    .ieee-topic-grid {
        grid-template-columns: 1fr;
    }

    .ieee-tool-callout {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .ieee-learning-path {
        grid-template-columns: 1fr;
    }

    .ieee-guide-article .ieee-table {
        font-size: 13px;
    }
}