:root {
    color-scheme: light;
    --ink: #17202a;
    --muted: #586474;
    --line: #dce2e8;
    --soft: #f5f7f9;
    --blue: #1469b8;
    --blue-dark: #0d4d88;
    --teal: #13766f;
    --coral: #b94e3c;
    --paper: #ffffff;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    line-height: 1.7;
}

body.promo-visible {
    padding-top: 48px;
}

img {
    max-width: 100%;
}

a {
    color: var(--blue);
    text-underline-offset: 3px;
}

a:hover {
    color: var(--blue-dark);
}

:where(a, button, select, [tabindex]:not([tabindex="-1"])):focus-visible {
    outline: 3px solid var(--blue);
    outline-offset: 3px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
}

body.promo-visible .site-header {
    top: 48px;
}

.header-inner,
.page-shell,
.footer-inner {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
}

.header-inner {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    font-weight: 750;
    text-decoration: none;
    white-space: nowrap;
}

.brand img {
    width: 34px;
    height: 34px;
    border-radius: 6px;
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 24px;
    font-size: 0.92rem;
    font-weight: 650;
}

.site-nav a {
    color: #354252;
    text-decoration: none;
}

.site-nav a[aria-current="page"] {
    color: var(--blue);
}

.site-nav .download-link {
    padding: 8px 14px;
    border-radius: 5px;
    color: #fff;
    background: var(--blue);
}

.page-shell {
    padding: 42px 0 80px;
}

.breadcrumbs {
    margin-bottom: 30px;
    color: var(--muted);
    font-size: 0.86rem;
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.breadcrumbs li:not(:last-child)::after {
    content: "/";
    margin-left: 8px;
    color: #9aa4ae;
}

.breadcrumbs a {
    color: inherit;
}

.article-header {
    max-width: 890px;
    padding: 18px 0 38px;
    border-bottom: 1px solid var(--line);
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--teal);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}

h1,
h2,
h3 {
    line-height: 1.22;
}

h1 {
    max-width: 850px;
    margin: 0;
    font-size: clamp(2.2rem, 6vw, 4.45rem);
    font-weight: 800;
}

.article-header h1 {
    font-size: clamp(2.15rem, 5.1vw, 3.8rem);
}

.dek {
    max-width: 800px;
    margin: 22px 0 0;
    color: var(--muted);
    font-size: clamp(1.06rem, 2.2vw, 1.25rem);
}

.byline {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    margin-top: 22px;
    color: #687584;
    font-size: 0.87rem;
}

.guide-layout {
    display: grid;
    grid-template-columns: minmax(0, 770px) 250px;
    gap: 70px;
    align-items: start;
    margin-top: 40px;
}

.guide-content {
    min-width: 0;
}

.guide-content [id] {
    scroll-margin-top: 88px;
}

.guide-content h2 {
    margin: 58px 0 16px;
    padding-top: 8px;
    font-size: clamp(1.55rem, 3vw, 2.05rem);
}

.guide-content h3 {
    margin: 34px 0 10px;
    font-size: 1.22rem;
}

.guide-content p,
.guide-content li {
    color: #2d3845;
}

.guide-content ul,
.guide-content ol {
    padding-left: 1.35rem;
}

.guide-content li + li {
    margin-top: 8px;
}

.quick-answer,
.note,
.warning {
    margin: 28px 0;
    padding: 20px 22px;
    border-left: 4px solid var(--teal);
    background: #eff8f6;
}

.quick-answer strong,
.note strong,
.warning strong {
    display: block;
    margin-bottom: 5px;
    color: var(--ink);
}

.warning {
    border-left-color: var(--coral);
    background: #fcf3f1;
}

.model-card {
    position: relative;
    overflow: hidden;
    margin: 24px 0 34px;
    padding: 24px;
    border: 1px solid #b9ddd5;
    border-radius: 18px;
    background:
        radial-gradient(circle at 100% 0, rgb(35 128 112 / 14%), transparent 35%),
        linear-gradient(145deg, #f7fcfb, #eef8f5);
    box-shadow: 0 14px 34px rgb(19 63 75 / 9%);
}

.model-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
}

.model-card-eyebrow {
    display: block;
    margin-bottom: 4px;
    color: var(--teal);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.guide-content .model-card h3 {
    margin: 0;
    font-size: clamp(1.55rem, 4vw, 2rem);
    line-height: 1.15;
}

.model-card h3 a {
    color: var(--ink);
    text-decoration: none;
}

.model-card h3 a:hover {
    color: var(--teal);
}

.model-card-badge {
    flex: 0 0 auto;
    padding: 6px 10px;
    border: 1px solid #a8d7ce;
    border-radius: 999px;
    background: rgb(255 255 255 / 70%);
    color: #176b5d;
    font-size: 0.78rem;
    font-weight: 700;
    white-space: nowrap;
}

.model-card > p {
    margin: 18px 0 14px;
}

.model-card-points {
    margin: 0;
}

.model-card-specs {
    display: grid;
    grid-template-columns: 1.7fr 0.65fr 0.65fr;
    gap: 10px;
    margin: 20px 0;
}

.model-card-specs div {
    min-width: 0;
    padding: 12px 14px;
    border: 1px solid rgb(35 128 112 / 18%);
    border-radius: 12px;
    background: rgb(255 255 255 / 72%);
}

.model-card-specs dt {
    margin-bottom: 4px;
    color: var(--muted);
    font-size: 0.75rem;
}

.model-card-specs dd {
    margin: 0;
    color: var(--ink);
    font-size: 0.95rem;
    font-weight: 800;
    overflow-wrap: anywhere;
}

.model-card-specs code {
    font-size: 0.86rem;
}

.model-card-link {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: var(--teal);
    font-weight: 800;
    text-decoration: none;
}

.model-card-link:hover {
    text-decoration: underline;
}

.toc {
    position: sticky;
    top: 92px;
    padding-left: 20px;
    border-left: 1px solid var(--line);
}

.toc strong {
    display: block;
    margin-bottom: 10px;
    font-size: 0.82rem;
    text-transform: uppercase;
}

.toc ol {
    padding: 0;
    margin: 0;
    list-style: none;
}

.toc li + li {
    margin-top: 9px;
}

.toc a {
    color: var(--muted);
    font-size: 0.88rem;
    line-height: 1.4;
    text-decoration: none;
}

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

figure {
    margin: 34px 0;
}

figure img {
    display: block;
    width: 100%;
    max-height: 610px;
    object-fit: contain;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--soft);
}

figcaption {
    margin-top: 9px;
    color: #667382;
    font-size: 0.83rem;
    line-height: 1.5;
}

.table-wrap {
    overflow-x: auto;
    margin: 26px 0;
    border: 1px solid var(--line);
    border-radius: 6px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

th,
td {
    padding: 13px 15px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

th {
    background: var(--soft);
    color: var(--ink);
}

tr:last-child td {
    border-bottom: 0;
}

.steps {
    padding-left: 0 !important;
    counter-reset: guide-step;
    list-style: none;
}

.steps > li {
    position: relative;
    min-height: 42px;
    padding-left: 54px;
    counter-increment: guide-step;
}

.steps > li + li {
    margin-top: 22px;
}

.steps > li::before {
    content: counter(guide-step);
    position: absolute;
    left: 0;
    top: -2px;
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border: 1px solid #9ab9d4;
    border-radius: 50%;
    color: var(--blue-dark);
    font-weight: 800;
}

.faq-list {
    border-top: 1px solid var(--line);
}

.faq-item {
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
}

.faq-item h3 {
    margin: 0 0 8px;
    font-size: 1.05rem;
}

.faq-item p {
    margin: 0;
}

.article-cta {
    margin-top: 54px;
    padding: 28px;
    border: 1px solid #9db7cf;
    border-radius: 6px;
    background: #f4f8fb;
}

.article-cta h2 {
    margin: 0 0 10px;
    padding: 0;
    font-size: 1.45rem;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

.button {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    padding: 9px 15px;
    border: 1px solid var(--blue);
    border-radius: 5px;
    color: var(--blue);
    font-weight: 700;
    text-decoration: none;
}

.button.primary {
    color: #fff;
    background: var(--blue);
}

.hub-intro {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 70px;
    align-items: end;
    padding: 22px 0 52px;
    border-bottom: 1px solid var(--line);
}

.hub-note {
    margin: 0;
    padding: 18px 0 2px 20px;
    border-left: 3px solid var(--teal);
    color: var(--muted);
    font-size: 0.93rem;
}

.guide-list {
    margin-top: 50px;
}

.guide-list-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 18px;
}

.guide-list-header h2 {
    margin: 0;
    font-size: 1.65rem;
}

.guide-list-header p {
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.guide-card {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr) auto;
    gap: 26px;
    align-items: center;
    padding: 25px 0;
    border-top: 1px solid var(--line);
    color: inherit;
    text-decoration: none;
}

.guide-card:last-child {
    border-bottom: 1px solid var(--line);
}

.guide-card img {
    width: 190px;
    height: 119px;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    border: 1px solid var(--line);
    border-radius: 5px;
}

.guide-card .topic {
    display: block;
    margin-bottom: 5px;
    color: var(--teal);
    font-size: 0.76rem;
    font-weight: 800;
    text-transform: uppercase;
}

.guide-card h2 {
    margin: 0 0 7px;
    font-size: 1.3rem;
}

.guide-card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.94rem;
}

.guide-card .arrow {
    color: var(--blue);
    font-size: 1.45rem;
}

.related-guides {
    margin-top: 65px;
    padding-top: 34px;
    border-top: 1px solid var(--line);
}

.related-guides h2 {
    margin: 0 0 20px;
    font-size: 1.4rem;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.related-grid a {
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 5px;
    color: var(--ink);
    font-weight: 700;
    text-decoration: none;
}

.related-grid a:hover {
    border-color: #9ab9d4;
    color: var(--blue);
}

.model-comparison-table th[scope="row"] {
    min-width: 180px;
    color: var(--ink);
    font-weight: 750;
}

.model-profile-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin: 24px 0 42px;
}

.model-profile {
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--soft);
}

.model-profile h3 {
    margin: 0 0 8px;
    color: var(--ink);
    font-size: 1.05rem;
}

.model-profile p {
    margin: 0;
}

.model-profile .model-focus {
    margin-bottom: 10px;
    color: var(--blue);
    font-size: 0.83rem;
    font-weight: 750;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.model-profile .model-app-name {
    display: inline-flex;
    margin: 0 0 12px;
    padding: 3px 9px;
    border: 1px solid #b8cfe3;
    border-radius: 999px;
    background: #fff;
    color: var(--blue-dark);
    font-size: 0.78rem;
    font-weight: 750;
    letter-spacing: 0.02em;
}

.model-profile h3 a {
    color: inherit;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.2em;
}

.model-facts {
    margin: 0.8rem 0 0;
    padding-left: 1.15rem;
}

.model-facts li + li {
    margin-top: 0.45rem;
}

.model-language-details {
    margin-top: 1rem;
    padding-top: 0.85rem;
    border-top: 1px solid var(--line);
}

.model-language-details summary {
    cursor: pointer;
    font-weight: 700;
    color: var(--blue);
}

.model-language-details p {
    margin-top: 0.75rem;
    font-size: 0.93rem;
    line-height: 1.7;
}

.source-list a {
    overflow-wrap: anywhere;
}

.site-footer {
    border-top: 1px solid var(--line);
    background: #202a34;
    color: #d4dbe2;
}

.footer-inner {
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    padding: 30px 0;
}

.footer-inner p {
    margin: 0;
    font-size: 0.84rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-links a {
    color: #e5ebf0;
    font-size: 0.88rem;
}

@media (max-width: 900px) {
    .guide-layout,
    .hub-intro {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .toc {
        position: static;
        grid-row: 1;
        padding: 18px 20px;
        border: 1px solid var(--line);
        border-radius: 5px;
        background: var(--soft);
    }

    .toc ol {
        columns: 2;
    }
}

@media (max-width: 680px) {
    .model-profile-grid {
        grid-template-columns: 1fr;
    }

    .model-card {
        padding: 20px;
    }

    .model-card-header {
        display: block;
    }

    .model-card-badge {
        display: inline-block;
        margin-top: 12px;
    }

    .model-card-specs {
        grid-template-columns: 1fr;
    }

    .guide-content [id] {
        scroll-margin-top: 140px;
    }

    .header-inner,
    .page-shell,
    .footer-inner {
        width: min(100% - 28px, 1180px);
    }

    .header-inner {
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
        padding: 12px 0;
    }

    .site-nav {
        width: 100%;
        justify-content: flex-start;
        gap: 16px;
        overflow-x: auto;
        white-space: nowrap;
    }

    .site-nav .download-link {
        padding: 4px 9px;
    }

    .page-shell {
        padding-top: 28px;
    }

    .toc ol {
        columns: 1;
    }

    .guide-card {
        grid-template-columns: 92px minmax(0, 1fr);
        gap: 15px;
    }

    .guide-card img {
        width: 92px;
        height: 92px;
        aspect-ratio: 1;
    }

    .guide-card .arrow {
        display: none;
    }

    .guide-card h2 {
        font-size: 1.05rem;
    }

    .guide-card p {
        display: none;
    }

    .related-grid {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        align-items: flex-start;
        flex-direction: column;
    }
}