.article-block,
.math-block,
.code-block,
.takeaway-box,
.highlight-quote,
.tool-card {
    background: linear-gradient(135deg, rgba(255,255,255,0.08), rgba(255,255,255,0.04));
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 16px;
    padding: 1.25rem 1.35rem;
    margin: 1.2rem 0;
    box-shadow: 0 18px 40px rgba(2, 8, 23, 0.18);
    backdrop-filter: blur(12px);
    position: relative;
    overflow: hidden;
}



.article-block,
.article-block--math,
.math-block {
    background: linear-gradient(135deg, rgba(30, 136, 229, 0.16), rgba(14, 116, 199, 0.08));
    border: 1px solid rgba(96, 165, 250, 0.24);
    border-left: 4px solid rgba(59, 130, 246, 0.95);
    box-shadow: 0 12px 30px rgba(2, 8, 23, 0.16);
    color: #eef7ff;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}



.article-block--code,
.code-block {
    background: rgba(2, 6, 23, 0.95);
    border: 1px solid rgba(148, 163, 184, 0.24);
    border-left: 4px solid rgba(96, 165, 250, 0.95);
    box-shadow: 0 12px 30px rgba(2, 8, 23, 0.16);
    color: #e2f3ff;
}

.code-box {
    background: rgba(2, 6, 23, 0.95);
    border: 1px solid rgba(148, 163, 184, 0.24);
    border-left: 4px solid rgba(96, 165, 250, 0.95);
    box-shadow: 0 12px 30px rgba(2, 8, 23, 0.16);
    color: #e2f3ff;
}

.math-block p,
.code-block p,
.takeaway-box p,
.highlight-quote p,
.tool-card p {
    margin-bottom: 0.7rem;
}

.math-block p:last-child,
.code-block p:last-child,
.takeaway-box p:last-child,
.highlight-quote p:last-child,
.tool-card p:last-child {
    margin-bottom: 0;
}

.formula {
    font-style: italic;
    color: #e7f4ff;
}

pre {
    margin: 0;
    padding: 1rem;
    border-radius: 12px;
    background: rgba(2, 6, 23, 0.78);
    border: 1px solid rgba(148, 163, 184, 0.2);
    color: #e2f3ff;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 0.95rem;
    line-height: 1.55;
}

.code-block pre {
    margin: 0;
    padding: 1rem;
    border-radius: 12px;
    background: rgba(2, 6, 23, 0.82);
    border: 1px solid rgba(96, 165, 250, 0.18);
    color: #e2f3ff;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 0.95rem;
    line-height: 1.55;
    overflow-x: auto;
    white-space: pre;
}


.highlight-quote {
    border-left: 4px solid #38bdf8;
}

.tool-card {
    border-left: 4px solid #5eead4;
}

.takeaway-box {
    border-left: 4px solid #f59e0b;
}

.takeaway-list,
.feature-list {
    padding-left: 1.1rem;
    margin: 0;
}

.takeaway-list li,
.feature-list li {
    margin-bottom: 0.6rem;
    color: var(--paragraph-color);
}

.blog-section > .math-block,
.blog-section > .code-block,
.blog-section > .takeaway-box,
.blog-section > .highlight-quote,
.blog-section > .tool-card {
    margin-top: 1rem;
}

.chart-card {
    overflow-x: auto;
}

.chart-title {
    font-size: 1.1rem;
    color: #fff;
    margin-bottom: 0.75rem;
}

.chart-container {
    min-height: 350px;
    min-width: 550px;
}



.math-bridge {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    gap: 0.75rem;
}

.math-bridge-label {
    color: #94a3b8;
    display: block;
    font-size: 0.85em;
    text-align: center;
    margin-bottom: 0.35rem;
}

.math-bridge-arrow {
    color: #64748b;
    font-size: 1.2em;
}

.nn-graph-wrapper {
    margin: 20px 0 25px;
}

.nn-graph-card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(74, 144, 226, 0.25);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
    text-align: center;
}

.nn-graph-svg {
    display: block;
    width: 100%;
    height: auto;
    max-width: 650px;
    margin: 0 auto;
}

.nn-caption {
    margin-top: 12px;
    font-size: 0.95rem;
    color: #dfe9f5;
    text-align: center;
    line-height: 1.5;
}

.sigmoid-graph-wrapper {
    margin: 20px 0 10px;
}

.sigmoid-graph-card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(74, 144, 226, 0.25);
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.sigmoid-graph {
    display: block;
    width: 100%;
    height: auto;
    max-width: 700px;
    margin: 0 auto;
}

.sigmoid-caption {
    margin-top: 12px;
    font-size: 0.95rem;
    color: #dfe9f5;
    text-align: center;
    line-height: 1.5;
}

.svm-graph-wrapper {
    margin: 24px 0 12px;
}

.svm-graph-card {
    background: #0f172a;
    border: 2px solid #334155;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
}

.svm-graph {
    display: block;
    width: 100%;
    height: auto;
    max-width: 100%;
}

.svm-caption {
    margin-top: 14px;
    font-size: 0.95rem;
    color: #94a3b8;
    text-align: center;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .math-block,
    .code-block,
    .takeaway-box,
    .highlight-quote,
    .tool-card {
        padding: 1rem;
        margin: 1rem 0;
        border-radius: 12px;
    }

    .math-block p {
        font-size: 12px;
    }

    .derivation-step {
        margin: 0.8rem 0;
        padding: 0.75rem 0.9rem;
    }

    pre {
        font-size: 12px !important;
        padding: 12px !important;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .sigmoid-graph-card, .nn-graph-card {
        padding: 12px;
        border-radius: 10px;
    }

    .sigmoid-caption, .nn-caption {
        font-size: 0.9rem;
        margin-top: 10px;
    }

    .svm-graph-card {
        padding: 16px;
        border-radius: 8px;
    }
}

@media (max-width: 480px) {
    .math-block,
    .code-block,
    .takeaway-box,
    .highlight-quote,
    .tool-card {
        padding: 0.9rem;
        margin: 0.8rem 0;
        font-size: 0.9rem;
    }

    .math-block p {
        font-size: 12px;
    }

    .svm-graph-card {
        padding: 10px;
        border-radius: 6px;
    }

    .svm-caption {
        font-size: 0.85rem;
        line-height: 1.4;
    }

    .derivation-step {
        margin: 10px 0;
        padding: 6px;
    }

    pre {
        font-size: 11px !important;
        padding: 8px !important;
    }

    .sigmoid-graph-card, .nn-graph-card {
        padding: 10px;
    }

    .sigmoid-caption, .nn-caption {
        font-size: 0.85rem;
        line-height: 1.4;
    }
}