.business-idea-page {
    background: linear-gradient(165deg, #1a2533 0%, #131c29 100%);
    border: 1px solid #ffffff12;
    border-radius: 22px;
    padding: clamp(20px, 3vw, 32px);
    margin-top: 12px;
    box-shadow: 0 24px 48px -20px #00000080;
}

.business-idea-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 20px;
    padding-bottom: 18px;
    border-bottom: 1px solid #ffffff10;
}

.business-idea-head h1 {
    font-size: clamp(1.25rem, 3vw, 1.55rem);
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
    font-weight: 700;
}

.business-idea-head h1 i {
    color: #fbbf24;
}

.business-idea-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
    font-size: 0.78rem;
    opacity: 0.72;
    margin-top: 8px;
}

.business-idea-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.business-idea-product-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    background: #4884ff18;
    border: 1px solid #4884ff40;
    color: #b8d4ff;
    font-size: 0.82rem;
    text-decoration: none;
    margin-bottom: 16px;
    transition: 0.2s;
}

.business-idea-product-tag:hover {
    background: #4884ff28;
    color: #fff;
}

.business-idea-layout {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 28px;
    align-items: start;
}

.business-idea-layout--full {
    grid-template-columns: 1fr;
}

.business-idea-layout--full .business-idea-article {
    max-width: 800px;
    margin: 0 auto;
}

.business-idea-toc {
    position: sticky;
    top: 88px;
    padding: 16px;
    border-radius: 14px;
    background: #0f1722;
    border: 1px solid #2a3545;
    font-size: 0.78rem;
}

.business-idea-toc__title {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    opacity: 0.5;
    margin: 0 0 10px;
}

.business-idea-toc ol {
    margin: 0;
    padding-left: 18px;
}

.business-idea-toc li { margin-bottom: 6px; }

.business-idea-toc a {
    color: #9aabbf;
    text-decoration: none;
}

.business-idea-toc a:hover {
    color: #93c5fd;
}

.business-idea-article {
    line-height: 1.75;
    font-size: 1rem;
    color: #e2e8f0;
    max-width: 720px;
}

.business-idea-article > *:first-child {
    margin-top: 0;
}

.business-idea-article h1,
.business-idea-article h2,
.business-idea-article h3,
.business-idea-article h4 {
    color: #f8fafc;
    font-weight: 700;
    line-height: 1.3;
    margin: 1.6em 0 0.65em;
    scroll-margin-top: 100px;
}

.business-idea-article h1 { font-size: 1.65rem; }
.business-idea-article h2 { font-size: 1.35rem; border-bottom: 1px solid #ffffff10; padding-bottom: 0.35em; }
.business-idea-article h3 { font-size: 1.15rem; color: #93c5fd; }
.business-idea-article h4 { font-size: 1.05rem; }

.business-idea-article p {
    margin: 0 0 1em;
}

.business-idea-article ul,
.business-idea-article ol {
    margin: 0 0 1.1em 1.35em;
    padding: 0;
}

.business-idea-article li {
    margin-bottom: 0.45em;
}

.business-idea-article blockquote {
    margin: 1.2em 0;
    padding: 14px 18px;
    border-left: 4px solid #4884ff;
    background: #4884ff12;
    border-radius: 0 12px 12px 0;
    color: #cbd5e1;
    font-style: italic;
}

.business-idea-article pre,
.business-idea-article code {
    font-family: ui-monospace, 'Cascadia Code', Consolas, monospace;
    font-size: 0.88em;
}

.business-idea-article pre {
    background: #0a0f1a;
    border: 1px solid #2a3545;
    border-radius: 12px;
    padding: 14px 16px;
    overflow-x: auto;
    margin: 1em 0;
}

.business-idea-article code {
    background: #0f1722;
    padding: 2px 6px;
    border-radius: 6px;
}

.business-idea-article a {
    color: #8aa9ff;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.business-idea-article a:hover {
    color: #b8d0ff;
}

.business-idea-article img {
    display: block;
    max-width: 100%;
    height: auto;
    border-radius: 14px;
    margin: 1.25em auto;
    border: 1px solid #ffffff15;
    box-shadow: 0 12px 32px -12px #00000060;
}

.business-idea-article table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.2em 0;
    font-size: 0.9rem;
}

.business-idea-article th,
.business-idea-article td {
    border: 1px solid #2a3545;
    padding: 10px 12px;
    text-align: left;
}

.business-idea-article th {
    background: #0f1722;
    color: #93c5fd;
}

.business-idea-article hr {
    border: none;
    border-top: 1px solid #ffffff15;
    margin: 2em 0;
}

.business-idea-article figure {
    margin: 1.25em 0;
    text-align: center;
}

.business-idea-article figcaption {
    font-size: 0.82rem;
    opacity: 0.65;
    margin-top: 8px;
}

@media (max-width: 800px) {
    .business-idea-layout {
        grid-template-columns: 1fr;
    }

    .business-idea-toc {
        position: static;
    }
}

@media print {
    .business-idea-head .btn-secondary,
    .business-idea-toc,
    .site-header,
    footer {
        display: none !important;
    }

    .business-idea-page {
        border: none;
        box-shadow: none;
        padding: 0;
    }

    .business-idea-article {
        color: #111;
        max-width: 100%;
    }
}