/* HTX SEO ledger — white + #4d9ded */
@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,560;9..144,700&family=Source+Sans+3:wght@400;600;700&display=swap");

:root {
    --seo-paper: #ffffff;
    --seo-card: #ffffff;
    --seo-ink: #1e2a38;
    --seo-muted: #5a6b7c;
    --seo-copper: #4d9ded;
    --seo-copper-deep: #2f82d6;
    --seo-teal: #4d9ded;
    --seo-line: #d7e6f6;
    --seo-chip: #eef6fd;
}

html {
    background: var(--seo-paper) !important;
}

.seo-page {
    background: #ffffff;
    color: var(--seo-ink);
    font-family: "Source Sans 3", "Segoe UI", sans-serif;
}

.seo-container {
    max-width: 1180px;
    margin: 36px auto 72px;
    padding: 0 22px 8px;
}

.seo-shell {
    display: grid;
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
    gap: 28px 36px;
    align-items: start;
}

.seo-toc {
    position: sticky;
    top: 18px;
    background: var(--seo-card);
    border: 1px solid var(--seo-line);
    border-left: 6px solid var(--seo-teal);
    padding: 20px 18px 16px;
    box-shadow: 8px 10px 0 rgba(77, 157, 237, 0.08);
}

.seo-nav-label {
    font-family: Fraunces, Georgia, serif;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--seo-teal);
    margin: 0 0 14px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.seo-toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 8px;
    counter-reset: seo-nav;
}

.seo-toc-list li {
    counter-increment: seo-nav;
}

.seo-toc-list a {
    display: grid;
    grid-template-columns: 28px 1fr;
    gap: 8px;
    align-items: start;
    padding: 8px 6px;
    color: var(--seo-ink);
    text-decoration: none;
    font-size: 0.92rem;
    line-height: 1.4;
    border-bottom: 1px dashed var(--seo-line);
}

.seo-toc-list a::before {
    content: counter(seo-nav, decimal-leading-zero);
    font-family: Fraunces, Georgia, serif;
    font-size: 0.78rem;
    color: var(--seo-copper);
    padding-top: 2px;
}

.seo-toc-list a:hover,
.seo-toc-list a:focus-visible {
    color: var(--seo-copper-deep);
    outline: none;
}

.seo-main {
    min-width: 0;
}

.seo-header-block {
    margin-bottom: 28px;
    padding: 28px 28px 24px;
    background: var(--seo-card);
    border: 1px solid var(--seo-line);
    box-shadow: 12px 14px 0 rgba(77, 157, 237, 0.08);
}

.seo-kicker {
    display: inline-block;
    margin: 0 0 10px;
    padding: 4px 10px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #ffffff;
    background: var(--seo-teal);
}

.seo-header-block .seo-h1 {
    font-family: Fraunces, Georgia, serif;
    font-size: clamp(1.7rem, 4vw, 2.35rem);
    font-weight: 700;
    color: var(--seo-ink);
    margin: 0 0 14px;
    line-height: 1.2;
}

.seo-lead {
    font-size: 1.08rem;
    line-height: 1.75;
    color: var(--seo-muted);
    margin: 0;
}

.seo-brief {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 18px 0 0;
}

.seo-brief span {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--seo-teal);
    background: var(--seo-chip);
    border: 1px solid var(--seo-line);
    padding: 5px 9px;
}

.seo-section {
    margin-bottom: 36px;
    scroll-margin-top: 20px;
    background: var(--seo-card);
    border: 1px solid var(--seo-line);
    padding: 26px 26px 22px;
}

.seo-section .seo-h2 {
    font-family: Fraunces, Georgia, serif;
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--seo-teal);
    margin: 0 0 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--seo-copper);
}

.seo-section .seo-h3 {
    font-family: Fraunces, Georgia, serif;
    font-size: 1.22rem;
    font-weight: 700;
    color: var(--seo-ink);
    margin: 26px 0 12px;
    line-height: 1.35;
}

.seo-section .seo-h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--seo-copper-deep);
    margin: 20px 0 8px;
}

.seo-section .seo-h5 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--seo-teal);
    margin: 16px 0 8px;
}

.seo-section .seo-h6 {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--seo-muted);
    margin: 14px 0 6px;
}

.seo-prose p {
    font-size: 1.02rem;
    line-height: 1.8;
    color: #2a3a4c;
    margin: 0 0 14px;
}

.seo-prose ul,
.seo-prose ol {
    margin: 0 0 16px 1.15em;
    padding: 0;
    color: #2a3a4c;
    line-height: 1.7;
}

.seo-img-wrap {
    margin: 22px 0;
    text-align: center;
}

.seo-img-wrap img {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--seo-line);
    filter: saturate(0.92);
}

.seo-img-caption {
    display: block;
    margin-top: 8px;
    font-size: 0.88rem;
    color: var(--seo-muted);
    font-style: italic;
}

.seo-features {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 18px;
    counter-reset: feat;
}

.seo-feature-item {
    background: #fff;
    padding: 16px 16px 14px;
    border: 1px solid var(--seo-line);
    border-top: 3px solid var(--seo-teal);
    counter-increment: feat;
}

.seo-feature-item .seo-h4 {
    margin-top: 0;
    color: var(--seo-ink);
}

.seo-feature-item .seo-h4::before {
    content: counter(feat, decimal-leading-zero) " / ";
    color: var(--seo-copper);
    font-family: Fraunces, Georgia, serif;
    font-weight: 700;
}

.seo-feature-item p {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--seo-muted);
}

.seo-faq-item {
    background: #fff;
    border: 1px solid var(--seo-line);
    margin-bottom: 12px;
    display: grid;
    grid-template-columns: 42px 1fr;
}

.seo-faq-q {
    grid-column: 2;
    margin: 0;
    padding: 14px 16px 8px;
    font-family: Fraunces, Georgia, serif;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--seo-ink);
}

.seo-faq-item::before {
    content: "Q";
    font-family: Fraunces, Georgia, serif;
    font-weight: 700;
    color: #ffffff;
    background: var(--seo-copper);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 14px;
    grid-row: 1 / span 2;
}

.seo-faq-a {
    grid-column: 2;
    padding: 0 16px 16px;
}

.seo-faq-a p {
    margin: 0 0 10px;
    font-size: 0.98rem;
    line-height: 1.75;
    color: #3d5169;
}

.seo-faq-a p:last-child {
    margin-bottom: 0;
}

.seo-review-item {
    background: #fff;
    border: 1px solid var(--seo-line);
    padding: 16px 18px 16px 20px;
    margin-bottom: 12px;
    border-left: 4px solid var(--seo-teal);
}

.seo-review-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px 12px;
    margin-bottom: 8px;
}

.seo-review-name {
    font-family: Fraunces, Georgia, serif;
    font-weight: 700;
    color: var(--seo-ink);
}

.seo-review-date {
    font-size: 0.84rem;
    color: var(--seo-muted);
}

.seo-review-rating {
    color: var(--seo-copper);
    letter-spacing: 1px;
}

.seo-review-item p {
    margin: 0;
    font-size: 0.97rem;
    line-height: 1.7;
    color: #3d5169;
}

.seo-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 10px;
    margin-top: 14px;
}

.seo-links-grid a {
    display: block;
    padding: 11px 12px;
    font-size: 0.92rem;
    font-weight: 700;
    text-decoration: none;
    border: 1px solid var(--seo-line);
    color: var(--seo-teal);
    background: #fff;
}

.seo-links-grid a:hover,
.seo-links-grid a:focus-visible {
    background: var(--seo-chip);
    color: var(--seo-copper-deep);
    outline: none;
}

.seo-links-grid.seo-links-external a {
    color: var(--seo-ink);
    font-weight: 600;
}

.seo-share {
    margin-top: 8px;
    padding: 22px 20px;
    background: var(--seo-teal);
    color: #ffffff;
    text-align: left;
}

.seo-share-title {
    margin: 0 0 12px;
    font-family: Fraunces, Georgia, serif;
    font-size: 1.2rem;
}

.seo-share-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.seo-share-buttons a,
.seo-share-buttons .seo-share-btn {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    background: transparent;
    color: #ffffff;
    font-weight: 700;
    font-size: 0.88rem;
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.55);
}

.seo-share-buttons a:hover,
.seo-share-buttons .seo-share-btn:hover {
    background: #ffffff;
    color: var(--seo-teal);
}

.seo-mini-footer {
    margin-top: 8px;
    padding: 26px 8px 10px;
    border-top: 3px double var(--seo-line);
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.seo-mini-footer .seo-footer-col-title {
    margin: 0 0 8px;
    font-family: Fraunces, Georgia, serif;
    font-size: 1.02rem;
    color: var(--seo-teal);
}

.seo-mini-footer p,
.seo-mini-footer a {
    margin: 0 0 8px;
    font-size: 0.93rem;
    line-height: 1.6;
    color: var(--seo-muted);
}

.seo-mini-footer a {
    color: var(--seo-copper-deep);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.seo-social-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 8px 14px;
}

.seo-copyright {
    grid-column: 1 / -1;
    text-align: left;
    font-size: 0.86rem;
    color: var(--seo-muted);
    padding-top: 6px;
}

@media (max-width: 900px) {
    .seo-shell {
        grid-template-columns: 1fr;
    }

    .seo-toc {
        position: static;
    }

    .seo-toc-list {
        grid-template-columns: 1fr 1fr;
    }

    .seo-features,
    .seo-mini-footer {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 620px) {
    .seo-container {
        margin: 18px auto 48px;
        padding: 0 12px;
    }

    .seo-header-block,
    .seo-section {
        padding: 18px 14px 16px;
    }

    .seo-toc-list {
        grid-template-columns: 1fr;
    }

    .seo-share-buttons {
        flex-direction: column;
    }
}