.article-hero {
    padding: clamp(4rem, 8vw, 7rem) 0 clamp(3rem, 6vw, 5rem);
    background:
        radial-gradient(circle at 85% 15%, rgba(91, 141, 239, 0.15), transparent 27rem),
        var(--color-bg-alt);
}

.article-hero .blog-title {
    max-width: 980px;
    font-size: clamp(2.6rem, 6vw, 5.7rem);
    line-height: 0.98;
    letter-spacing: -0.06em;
}

.article-hero .blog-intro {
    max-width: 800px;
    font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.article-cover {
    margin-top: clamp(2rem, 5vw, 4rem);
}

.article-cover img {
    width: 100%;
    height: clamp(20rem, 52vw, 40rem);
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.article-cover figcaption,
.article-inline-image figcaption {
    margin-top: 0.75rem;
    color: var(--color-text-muted);
    font-size: 0.75rem;
}

.article-lead {
    color: var(--color-text) !important;
    font-size: clamp(1.08rem, 1.8vw, 1.25rem) !important;
    line-height: 1.75 !important;
}

.article-pullquote {
    margin: 3rem 0;
    padding: 2.5rem 0 2.5rem 2rem;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    border-left: 3px solid var(--color-accent);
}

.article-pullquote span,
.sidebar-overline,
.sidebar-project-card > span {
    color: var(--color-accent-2);
    font: 700 0.68rem/1 var(--font-heading);
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.article-pullquote blockquote {
    margin-top: 0.8rem;
    color: var(--color-text);
    font: 700 clamp(1.8rem, 4vw, 3.4rem)/1.1 var(--font-heading);
    letter-spacing: -0.045em;
}

.article-pullquote-small blockquote {
    font-size: clamp(1.6rem, 3vw, 2.45rem);
}

.principle-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin: 2rem 0 3rem;
}

.principle-card {
    padding: 1.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.principle-card > span {
    color: var(--color-accent-2);
    font: 700 0.65rem/1 var(--font-heading);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.principle-card h3 {
    margin: 0.75rem 0 0.6rem;
    color: var(--color-text);
}

.principle-card p {
    margin: 0;
    font-size: 0.86rem;
    line-height: 1.65;
}

.article-inline-image {
    margin: 3rem 0;
}

.article-inline-image img {
    width: 100%;
    max-height: 34rem;
    object-fit: cover;
    border-radius: var(--radius-md);
}

.planning-checklist {
    display: grid;
    gap: 0.65rem;
    margin: 1.5rem 0 3rem;
}

.planning-checklist label {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    padding: 1rem 1.1rem;
    color: var(--color-text-muted);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.92rem;
    line-height: 1.55;
}

.planning-checklist input {
    width: 1rem;
    height: 1rem;
    margin-top: 0.18rem;
    accent-color: var(--color-accent);
}

.planning-checklist label:has(input:checked) span {
    text-decoration: line-through;
    opacity: 0.65;
}

.article-nav-card {
    border-top: 3px solid var(--color-accent);
}

.article-toc {
    margin: 1rem 0 0;
    list-style: none;
    counter-reset: toc;
}

.article-toc li {
    counter-increment: toc;
    border-bottom: 1px solid var(--color-border);
}

.article-toc li:last-child { border-bottom: 0; }

.article-toc a {
    display: flex;
    gap: 0.75rem;
    padding: 0.65rem 0;
    color: var(--color-text-muted);
    font-size: 0.82rem;
}

.article-toc a::before {
    content: '0' counter(toc);
    color: var(--color-accent-2);
    font-size: 0.68rem;
}

.article-toc a:hover { color: var(--color-text); }

.sidebar-project-card {
    background: linear-gradient(145deg, rgba(91, 141, 239, 0.16), var(--color-surface));
}

.sidebar-project-card h4 {
    margin: 0.75rem 0;
    font-size: 1.3rem;
    line-height: 1.25;
}

.sidebar-project-card .btn {
    width: 100%;
    justify-content: center;
    margin-top: 1rem;
}

@media (max-width: 900px) {
    .principle-grid { grid-template-columns: 1fr; }
    .article-cover { padding: 0 1rem; }
}

@media (max-width: 600px) {
    .article-hero .blog-meta { align-items: flex-start; flex-direction: column; gap: 0.65rem; }
    .article-pullquote { padding: 1.75rem 0 1.75rem 1.25rem; }
}