.kb-test-page {
    --kb-test-ink: #0f172a;
    --kb-test-muted: #475569;
    --kb-test-line: #dbe4ef;
    --kb-test-surface: #f6f8fb;
    --kb-test-accent: #0b63ce;
    --kb-test-accent-dark: #084d9f;
    --kb-test-warm: #c94c16;
    color: var(--kb-test-ink);
    background: #fff;
}

.kb-test-page *,
.kb-test-page *::before,
.kb-test-page *::after { box-sizing: border-box; }

.kb-test-breadcrumb-wrap { padding-top: 1rem; }

.kb-test-page .breadcrumb-nav {
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
    color: var(--kb-test-muted);
    font-size: .9rem;
}

.kb-test-page .breadcrumb-nav a { color: var(--kb-test-accent-dark); }

.kb-test-hero {
    position: relative;
    overflow: hidden;
    padding: clamp(2.5rem, 6vw, 5.5rem) 0;
    background:
        radial-gradient(circle at 90% 10%, rgba(11,99,206,.14), transparent 34rem),
        linear-gradient(180deg, #f8fbff 0%, #fff 100%);
}

.kb-test-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.02fr) minmax(340px, .98fr);
    align-items: center;
    gap: clamp(2rem, 5vw, 5rem);
}

.kb-test-kicker {
    margin: 0 0 .7rem;
    color: var(--kb-test-accent-dark);
    font-size: .82rem;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.kb-test-hero h1 {
    max-width: 16ch;
    margin: 0;
    font-size: clamp(2.25rem, 5vw, 4.4rem);
    line-height: 1.02;
    letter-spacing: -.045em;
}

.kb-test-hero__lead {
    max-width: 64ch;
    margin: 1.2rem 0 0;
    color: var(--kb-test-muted);
    font-size: clamp(1.05rem, 2vw, 1.25rem);
    line-height: 1.65;
}

.kb-test-hero__checks {
    display: grid;
    gap: .65rem;
    margin: 1.5rem 0 0;
    padding: 0;
    list-style: none;
}

.kb-test-hero__checks li {
    position: relative;
    padding-left: 1.7rem;
    line-height: 1.5;
}

.kb-test-hero__checks li::before {
    position: absolute;
    top: .12rem;
    left: 0;
    content: "✓";
    color: var(--kb-test-accent);
    font-weight: 900;
}

.kb-test-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .75rem;
    margin-top: 1.6rem;
}

.kb-test-button {
    display: inline-flex;
    min-height: 46px;
    align-items: center;
    justify-content: center;
    padding: .78rem 1.15rem;
    border: 1px solid transparent;
    border-radius: .8rem;
    font-weight: 800;
    line-height: 1.25;
    text-align: center;
    text-decoration: none;
    transition: transform .18s ease, box-shadow .18s ease, background-color .18s ease;
}

.kb-test-button--primary {
    color: #fff;
    background: var(--kb-test-accent);
    box-shadow: 0 .65rem 1.6rem rgba(11,99,206,.22);
}

.kb-test-button--primary:hover { color: #fff; background: var(--kb-test-accent-dark); transform: translateY(-1px); }

.kb-test-button--secondary {
    color: var(--kb-test-ink);
    border-color: #b8c8db;
    background: #fff;
}

.kb-test-button--secondary:hover { color: var(--kb-test-accent-dark); border-color: var(--kb-test-accent); }

.kb-test-button--disabled { color: #475569; border-color: #cbd5e1; background: #e2e8f0; cursor: not-allowed; font-family: inherit; font-size: inherit; opacity: 1; }
.kb-test-download-pending { display: flex; flex-direction: column; align-items: stretch; gap: .4rem; max-width: 100%; }
.kb-test-coming-soon { color: var(--kb-test-accent-dark); font-weight: 800; text-align: center; }

.kb-test-button:focus-visible,
.kb-test-page a:focus-visible,
.kb-test-page summary:focus-visible {
    outline: 3px solid #f59e0b;
    outline-offset: 3px;
}

.kb-test-download-meta { margin: .8rem 0 0; color: var(--kb-test-muted); font-size: .9rem; }

.kb-test-notice {
    margin-top: 1rem;
    padding: .9rem 1rem;
    border: 1px solid #f0bd70;
    border-radius: .75rem;
    color: #713b08;
    background: #fff8e8;
    font-size: .9rem;
    line-height: 1.55;
}

.kb-test-hero__visual,
.kb-test-screen-card,
.kb-test-gallery figure {
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--kb-test-line);
    border-radius: 1.25rem;
    background: #fff;
    box-shadow: 0 1.4rem 4rem rgba(15,23,42,.13);
}

.kb-test-hero__visual img,
.kb-test-screen-card img,
.kb-test-gallery img { display: block; width: 100%; height: auto; background: #eef3f8; }

.kb-test-hero__visual figcaption,
.kb-test-screen-card figcaption,
.kb-test-gallery figcaption { display: block; padding: .9rem 1rem; color: var(--kb-test-muted); font-size: .88rem; line-height: 1.5; }

.kb-test-section { padding: clamp(3.2rem, 7vw, 6rem) 0; }
.kb-test-section--surface { background: var(--kb-test-surface); }

.kb-test-heading { max-width: 760px; margin: 0 auto 2rem; text-align: center; }
.kb-test-heading--left { margin-left: 0; text-align: left; }
.kb-test-heading h2,
.kb-test-section h2 { margin: 0; font-size: clamp(1.8rem, 3.8vw, 3rem); line-height: 1.12; letter-spacing: -.025em; }
.kb-test-heading > p:last-child { color: var(--kb-test-muted); line-height: 1.65; }

.kb-test-feature-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.kb-test-feature-grid article {
    min-height: 210px;
    padding: 1.35rem;
    border: 1px solid var(--kb-test-line);
    border-radius: 1rem;
    background: #fff;
}

.kb-test-feature-grid article > span { color: var(--kb-test-accent); font-size: .78rem; font-weight: 900; letter-spacing: .1em; }
.kb-test-feature-grid h3 { margin: .75rem 0 .55rem; font-size: 1.16rem; }
.kb-test-feature-grid p { margin: 0; color: var(--kb-test-muted); line-height: 1.6; }

.kb-test-steps-layout,
.kb-test-reading-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: center;
    gap: clamp(2rem, 5vw, 4.5rem);
}

.kb-test-steps { display: grid; gap: 1rem; margin: 1.7rem 0 0; padding: 0; list-style: none; counter-reset: step; }
.kb-test-steps li { position: relative; min-height: 3.25rem; padding-left: 4rem; counter-increment: step; }
.kb-test-steps li::before {
    position: absolute;
    top: 0;
    left: 0;
    display: grid;
    width: 3rem;
    height: 3rem;
    place-items: center;
    border-radius: .8rem;
    content: counter(step, decimal-leading-zero);
    color: #fff;
    background: var(--kb-test-accent);
    font-weight: 900;
}
.kb-test-steps strong,
.kb-test-steps span { display: block; }
.kb-test-steps span { margin-top: .2rem; color: var(--kb-test-muted); line-height: 1.55; }

.kb-test-reading-grid > div > p { color: var(--kb-test-muted); line-height: 1.7; }

.kb-test-limits {
    padding: clamp(1.4rem, 4vw, 2.2rem);
    border: 1px solid var(--kb-test-line);
    border-radius: 1.2rem;
    background: #f8fafc;
}
.kb-test-limits h3 { margin-top: 0; }
.kb-test-limits ul { display: grid; gap: .6rem; padding-left: 1.25rem; }
.kb-test-limits li { color: var(--kb-test-muted); line-height: 1.55; }

.kb-test-section--gallery { background: #0f172a; color: #fff; }
.kb-test-section--gallery .kb-test-kicker { color: #93c5fd; }
.kb-test-gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.2rem; }
.kb-test-gallery figure { border-color: #334155; background: #172033; box-shadow: none; }
.kb-test-gallery figcaption { color: #d5deeb; }
.kb-test-gallery figcaption strong,
.kb-test-gallery figcaption span { display: block; }
.kb-test-gallery figcaption span { margin-top: .2rem; color: #b9c5d6; }

.kb-test-version-card {
    max-width: 980px;
    margin: 0 auto;
    padding: clamp(1.2rem, 4vw, 2rem);
    border: 1px solid var(--kb-test-line);
    border-radius: 1.25rem;
    background: #fff;
}
.kb-test-version-card dl { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem; margin: 0; }
.kb-test-version-card dl div { padding: .9rem; border-radius: .8rem; background: #f1f5f9; }
.kb-test-version-card dt { color: var(--kb-test-muted); font-size: .78rem; font-weight: 800; text-transform: uppercase; }
.kb-test-version-card dd { margin: .35rem 0 0; font-weight: 800; }
.kb-test-hash { margin-top: 1rem; }
.kb-test-hash span { display: block; margin-bottom: .4rem; color: var(--kb-test-muted); font-size: .78rem; font-weight: 800; }
.kb-test-hash code { display: block; overflow-wrap: anywhere; padding: .85rem; border: 1px solid #cbd5e1; border-radius: .7rem; background: #f8fafc; font-size: .78rem; }

.kb-test-manual__body { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.kb-test-manual__body > article { padding: 1.15rem; border: 1px solid var(--kb-test-line); border-radius: .9rem; background: #f8fafc; }
.kb-test-manual__body h3 { margin-top: 0; font-size: 1rem; }
.kb-test-manual__body p { margin-bottom: 0; color: var(--kb-test-muted); line-height: 1.6; }

.kb-test-jump-nav {
    display: flex;
    flex-wrap: wrap;
    gap: .65rem;
    margin: 0 0 2rem;
    padding: .85rem;
    border: 1px solid var(--kb-test-line);
    border-radius: 1rem;
    background: #f8fafc;
}

.kb-test-jump-nav a {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    padding: .6rem .9rem;
    border: 1px solid #bdcce0;
    border-radius: 999px;
    color: var(--kb-test-accent-dark);
    background: #fff;
    font-weight: 800;
    text-decoration: none;
}

.kb-test-jump-nav a:hover { border-color: var(--kb-test-accent); background: #eef6ff; }

.kb-test-device-guide { display: grid; gap: 1.25rem; }

.kb-test-guide-group {
    scroll-margin-top: 6rem;
    padding: clamp(1.25rem, 4vw, 2rem);
    border: 1px solid var(--kb-test-line);
    border-radius: 1.25rem;
    background: #fff;
    box-shadow: 0 .8rem 2.2rem rgba(15,23,42,.06);
}

.kb-test-guide-group--apple {
    border-color: #b9cee8;
    background: linear-gradient(145deg, #f5f9ff 0%, #fff 52%, #f8fafc 100%);
}

.kb-test-guide-group__heading { max-width: 860px; margin-bottom: 1.25rem; }
.kb-test-guide-group__heading > span {
    display: inline-flex;
    margin-bottom: .65rem;
    padding: .35rem .65rem;
    border-radius: 999px;
    color: #fff;
    background: var(--kb-test-accent-dark);
    font-size: .76rem;
    font-weight: 900;
    letter-spacing: .06em;
    text-transform: uppercase;
}
.kb-test-guide-group__heading h3 { margin: 0; font-size: clamp(1.35rem, 2.8vw, 2rem); line-height: 1.2; }
.kb-test-guide-group__heading p { margin: .75rem 0 0; color: var(--kb-test-muted); line-height: 1.7; }

.kb-test-guide-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .85rem; }
.kb-test-guide-grid article {
    padding: 1.15rem;
    border: 1px solid #d7e1ee;
    border-radius: .9rem;
    background: rgba(255,255,255,.92);
}
.kb-test-guide-grid h4 { margin: 0 0 .65rem; font-size: 1.03rem; line-height: 1.35; }
.kb-test-guide-grid p { margin: .55rem 0 0; color: var(--kb-test-muted); line-height: 1.65; }
.kb-test-guide-grid ol { display: grid; gap: .5rem; margin: 0; padding-left: 1.25rem; }
.kb-test-guide-grid li { padding-left: .15rem; color: var(--kb-test-muted); line-height: 1.58; }

.kb-test-spec-table-wrap {
    margin-top: 1rem;
    overflow-x: auto;
    border: 1px solid #c9d7e7;
    border-radius: .9rem;
    background: #fff;
}
.kb-test-spec-table-wrap:focus-visible { outline: 3px solid #f59e0b; outline-offset: 3px; }
.kb-test-spec-table { width: 100%; min-width: 720px; border-collapse: collapse; text-align: left; }
.kb-test-spec-table caption { padding: 1rem; color: var(--kb-test-ink); font-size: 1.05rem; font-weight: 900; text-align: left; }
.kb-test-spec-table th,
.kb-test-spec-table td { padding: .85rem 1rem; border-top: 1px solid #dbe4ef; vertical-align: top; line-height: 1.55; }
.kb-test-spec-table thead th { color: #334155; background: #eef4fb; font-size: .82rem; text-transform: uppercase; }
.kb-test-spec-table tbody th { width: 24%; color: var(--kb-test-ink); }
.kb-test-spec-table tbody td { color: var(--kb-test-muted); }

.kb-test-reference-links { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1rem; }
.kb-test-reference-links a {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    padding: .58rem .85rem;
    border: 1px solid #b8c8db;
    border-radius: .7rem;
    color: var(--kb-test-accent-dark);
    background: #fff;
    font-weight: 800;
    text-decoration: none;
}
.kb-test-reference-links a:hover { border-color: var(--kb-test-accent); background: #eef6ff; }

.kb-test-section--cta { background: linear-gradient(135deg, #eaf3ff, #fff6ee); }
.kb-test-final-cta { display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.kb-test-final-cta h2 { max-width: 18ch; }
.kb-test-final-cta p:not(.kb-test-kicker) { color: var(--kb-test-muted); }

.kb-test-faq-wrap { max-width: 920px; }
.kb-test-faq-list { display: grid; gap: .7rem; }
.kb-test-faq-list details { border: 1px solid var(--kb-test-line); border-radius: .8rem; background: #fff; }
.kb-test-faq-list summary { min-height: 52px; padding: .95rem 1.1rem; cursor: pointer; font-weight: 800; }
.kb-test-faq-list p { margin: 0; padding: 0 1.1rem 1rem; color: var(--kb-test-muted); line-height: 1.65; }

@media (max-width: 960px) {
    .kb-test-hero__grid,
    .kb-test-steps-layout,
    .kb-test-reading-grid { grid-template-columns: 1fr; }
    .kb-test-hero__visual { max-width: 760px; }
    .kb-test-feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .kb-test-manual__body { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .kb-test-version-card dl { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
    .kb-test-breadcrumb-wrap { padding-top: .7rem; }
    .kb-test-hero { padding-top: 2rem; }
    .kb-test-hero h1 { font-size: clamp(2rem, 11vw, 3rem); }
    .kb-test-feature-grid,
    .kb-test-gallery,
    .kb-test-manual__body,
    .kb-test-guide-grid,
    .kb-test-version-card dl { grid-template-columns: 1fr; }
    .kb-test-feature-grid article { min-height: 0; }
    .kb-test-actions,
    .kb-test-final-cta { align-items: stretch; flex-direction: column; }
    .kb-test-button { width: 100%; }
    .kb-test-steps li { padding-left: 3.65rem; }
    .kb-test-jump-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .kb-test-jump-nav a { justify-content: center; text-align: center; }
}

@media (max-width: 420px) {
    .kb-test-jump-nav { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
    .kb-test-button { transition: none; }
}