/*
 * N-HTB website styles
 * Self-contained: no external fonts or frameworks required.
 */

:root {
    --navy-950: #081c2f;
    --navy-900: #0d2944;
    --navy-800: #123a5e;
    --navy-700: #1b527b;
    --blue-100: #e9f2f8;
    --orange-700: #a9400b;
    --orange-600: #bd4b0d;
    --orange-100: #fff0e7;
    --green-700: #28613f;
    --green-100: #eaf6ee;
    --ink-900: #17222d;
    --ink-700: #3c4a57;
    --ink-600: #52616d;
    --ink-500: #667581;
    --line: #d7e0e7;
    --line-strong: #b9c7d1;
    --surface: #ffffff;
    --surface-muted: #f4f7f9;
    --surface-blue: #f1f6fa;
    --focus: #0b72b9;
    --danger: #9d2f24;
    --shadow-sm: 0 2px 10px rgba(8, 28, 47, 0.08);
    --shadow-md: 0 12px 34px rgba(8, 28, 47, 0.12);
    --radius-sm: 0.45rem;
    --radius-md: 0.8rem;
    --radius-lg: 1.25rem;
    --content: 75rem;
    --content-narrow: 52rem;
    --header-height: 4.75rem;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    color-scheme: light;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 1.5rem);
    font-size: 100%;
}

body {
    margin: 0;
    min-width: 20rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    background: var(--surface);
    color: var(--ink-900);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.65;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

main {
    flex: 1;
}

img,
picture,
svg {
    display: block;
    max-width: 100%;
}

img {
    height: auto;
}

button,
input,
select,
textarea {
    font: inherit;
}

button,
summary,
a {
    -webkit-tap-highlight-color: transparent;
}

a {
    color: var(--navy-700);
    text-underline-offset: 0.18em;
    text-decoration-thickness: 0.08em;
}

a:hover {
    color: var(--orange-700);
}

button,
a {
    touch-action: manipulation;
}

:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

::selection {
    background: #d8edf9;
    color: var(--navy-950);
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
figure,
blockquote {
    margin-top: 0;
}

h1,
h2,
h3,
h4 {
    color: var(--navy-950);
    font-weight: 760;
    letter-spacing: -0.025em;
    line-height: 1.16;
}

h1 {
    font-size: clamp(2.25rem, 5vw, 4.5rem);
}

h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.75rem);
}

h3 {
    font-size: clamp(1.15rem, 2vw, 1.45rem);
}

p:last-child,
ul:last-child,
ol:last-child {
    margin-bottom: 0;
}

[hidden] {
    display: none !important;
}

.container {
    width: min(calc(100% - 2rem), var(--content));
    margin-inline: auto;
}

.container--narrow {
    width: min(calc(100% - 2rem), var(--content-narrow));
    margin-inline: auto;
}

.section {
    padding-block: clamp(3.75rem, 8vw, 7rem);
}

.section--compact {
    padding-block: clamp(2.75rem, 6vw, 5rem);
}

.section--muted {
    background: var(--surface-muted);
}

.section--blue {
    background: var(--surface-blue);
}

.section-heading {
    max-width: 47rem;
    margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section-heading--center {
    margin-inline: auto;
    text-align: center;
}

.section-heading h2 {
    margin-bottom: 0.9rem;
}

.section-heading p {
    color: var(--ink-600);
    font-size: clamp(1rem, 1.8vw, 1.15rem);
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    margin-bottom: 0.8rem;
    color: var(--orange-700);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    line-height: 1.3;
    text-transform: uppercase;
}

.eyebrow::before {
    width: 1.4rem;
    height: 2px;
    background: currentColor;
    content: "";
}

.lead {
    color: var(--ink-700);
    font-size: clamp(1.08rem, 2vw, 1.28rem);
    line-height: 1.7;
}

.muted {
    color: var(--ink-600);
}

.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.skip-link {
    position: fixed;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 10000;
    padding: 0.7rem 1rem;
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--navy-950);
    box-shadow: var(--shadow-md);
    font-weight: 750;
    transform: translateY(-180%);
    transition: transform 0.2s ease;
}

.skip-link:focus {
    transform: translateY(0);
}

/* Buttons */
.button,
.button:visited {
    min-height: 2.85rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.72rem 1.15rem;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    background: var(--orange-600);
    color: #fff;
    cursor: pointer;
    font-weight: 760;
    line-height: 1.25;
    text-align: center;
    text-decoration: none;
    transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.button:hover {
    background: var(--orange-700);
    color: #fff;
    box-shadow: 0 7px 18px rgba(169, 64, 11, 0.2);
    transform: translateY(-1px);
}

.button--secondary,
.button--secondary:visited {
    border-color: var(--navy-800);
    background: var(--navy-800);
    color: #fff;
}

.button--secondary:hover {
    border-color: var(--navy-950);
    background: var(--navy-950);
}

.button--outline,
.button--outline:visited {
    border-color: var(--navy-800);
    background: transparent;
    color: var(--navy-800);
}

.button--outline:hover {
    background: var(--navy-800);
    color: #fff;
}

.button--light,
.button--light:visited {
    border-color: #fff;
    background: #fff;
    color: var(--navy-950);
}

.button--light:hover {
    border-color: var(--blue-100);
    background: var(--blue-100);
    color: var(--navy-950);
}

.button--small {
    min-height: 2.45rem;
    padding: 0.55rem 0.85rem;
    font-size: 0.9rem;
}

.button--wide {
    width: 100%;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    align-items: center;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--navy-800);
    font-weight: 740;
    text-decoration: none;
}

.text-link::after {
    content: "→";
    transition: transform 0.18s ease;
}

.text-link:hover::after {
    transform: translateX(0.2rem);
}

/* Site header */
.utility-bar {
    background: var(--navy-950);
    color: #dce8f1;
    font-size: 0.82rem;
}

.utility-bar__inner {
    min-height: 2.35rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.utility-bar p {
    margin: 0;
}

.utility-bar a {
    color: #fff;
    font-weight: 700;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(13, 41, 68, 0.12);
    background: rgba(255, 255, 255, 0.97);
    box-shadow: 0 2px 8px rgba(8, 28, 47, 0.05);
    backdrop-filter: blur(12px);
}

.site-header__inner {
    min-height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.4rem;
}

.brand,
.brand:visited {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    flex: 0 0 auto;
    color: var(--navy-950);
    text-decoration: none;
}

.brand__mark {
    width: 2.35rem;
    height: 2.35rem;
    display: grid;
    place-items: center;
    border-radius: 0.45rem;
    background: var(--navy-900);
    color: #fff;
    font-size: 1rem;
    font-weight: 850;
    letter-spacing: -0.05em;
}

.brand__name {
    display: block;
    font-size: 1.35rem;
    font-weight: 850;
    letter-spacing: 0.02em;
    line-height: 1;
}

.brand__tagline {
    display: block;
    margin-top: 0.22rem;
    color: var(--ink-600);
    font-size: 0.67rem;
    font-weight: 650;
    letter-spacing: 0.04em;
    line-height: 1.15;
    text-transform: uppercase;
}

.primary-nav {
    display: flex;
    align-items: center;
    gap: 0.15rem;
}

.primary-nav__link,
.primary-nav__link:visited {
    padding: 0.58rem 0.72rem;
    border-radius: 0.35rem;
    color: var(--ink-700);
    font-size: 0.93rem;
    font-weight: 700;
    line-height: 1.25;
    text-decoration: none;
}

.primary-nav__link:hover {
    background: var(--surface-muted);
    color: var(--navy-900);
}

.primary-nav__link[aria-current="page"] {
    background: var(--blue-100);
    color: var(--navy-900);
}

.primary-nav .button {
    margin-left: 0.45rem;
}

.nav-toggle {
    width: 2.85rem;
    height: 2.85rem;
    display: none;
    place-items: center;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--navy-950);
    cursor: pointer;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
    width: 1.25rem;
    height: 2px;
    display: block;
    border-radius: 2px;
    background: currentColor;
    content: "";
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle__bars {
    position: relative;
}

.nav-toggle__bars::before {
    position: absolute;
    top: -0.4rem;
}

.nav-toggle__bars::after {
    position: absolute;
    top: 0.4rem;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
    top: 0;
    transform: rotate(-45deg);
}

/* Breadcrumb and page hero */
.breadcrumb {
    padding-block: 1rem;
    border-bottom: 1px solid var(--line);
    background: var(--surface-muted);
    color: var(--ink-600);
    font-size: 0.87rem;
}

.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    padding: 0;
    margin: 0;
    list-style: none;
}

.breadcrumb li:not(:last-child)::after {
    margin-left: 0.45rem;
    color: var(--ink-500);
    content: "/";
}

.breadcrumb a {
    color: var(--ink-700);
}

.page-hero {
    padding-block: clamp(3.5rem, 8vw, 6.5rem);
    background:
        radial-gradient(circle at 90% 10%, rgba(217, 232, 242, 0.9), transparent 34%),
        linear-gradient(135deg, #f8fbfd 0%, #eef5f9 100%);
}

.page-hero__content {
    max-width: 53rem;
}

.page-hero h1 {
    max-width: 48rem;
    margin-bottom: 1.2rem;
}

.page-hero p {
    max-width: 48rem;
    margin-bottom: 0;
    color: var(--ink-700);
    font-size: clamp(1.05rem, 2vw, 1.25rem);
}

/* Home hero */
.home-hero {
    position: relative;
    overflow: hidden;
    background: var(--surface-blue);
}

.home-hero__grid {
    min-height: min(46rem, calc(100vh - 7rem));
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(28rem, 1.1fr);
    align-items: stretch;
}

.home-hero__content {
    position: relative;
    z-index: 2;
    align-self: center;
    padding: clamp(3.5rem, 7vw, 6.5rem) clamp(1.5rem, 4vw, 4rem) clamp(3.5rem, 7vw, 6.5rem) max(1rem, calc((100vw - var(--content)) / 2));
}

.home-hero__content h1 {
    max-width: 14ch;
    margin-bottom: 1.25rem;
    font-size: clamp(2.35rem, 4.25vw, 3.85rem);
}

.home-hero__content .lead {
    max-width: 36rem;
    margin-bottom: 1.7rem;
}

.hero-checks {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.55rem 1rem;
    padding: 0;
    margin: 0 0 2rem;
    list-style: none;
}

.hero-checks li {
    position: relative;
    padding-left: 1.55rem;
    color: var(--ink-700);
    font-size: 0.94rem;
    font-weight: 680;
}

.hero-checks li::before {
    position: absolute;
    top: 0.15em;
    left: 0;
    width: 1.05rem;
    height: 1.05rem;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--green-100);
    color: var(--green-700);
    content: "✓";
    font-size: 0.7rem;
    font-weight: 900;
}

.hero-carousel {
    position: relative;
    min-height: 32rem;
    overflow: hidden;
    background: var(--navy-950);
}

.hero-carousel::after {
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(90deg, rgba(8, 28, 47, 0.18), rgba(8, 28, 47, 0.02));
    pointer-events: none;
    content: "";
}

.carousel__slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.carousel__slide.is-active {
    opacity: 1;
    visibility: visible;
}

.hero-carousel .carousel__slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.carousel__controls {
    position: absolute;
    right: 1rem;
    bottom: 1rem;
    left: 1rem;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.carousel__buttons {
    display: flex;
    gap: 0.45rem;
}

.carousel__button {
    width: 2.7rem;
    height: 2.7rem;
    display: grid;
    place-items: center;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.48);
    border-radius: 50%;
    background: rgba(8, 28, 47, 0.78);
    color: #fff;
    cursor: pointer;
    font-size: 1.15rem;
    line-height: 1;
}

.carousel__button:hover {
    background: var(--navy-950);
}

.carousel__dots {
    display: flex;
    gap: 0.45rem;
    padding: 0.45rem 0.55rem;
    border-radius: 2rem;
    background: rgba(8, 28, 47, 0.72);
}

.carousel__dot {
    width: 0.7rem;
    height: 0.7rem;
    padding: 0;
    border: 2px solid #fff;
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
}

.carousel__dot[aria-current="true"] {
    background: #fff;
}

/* Trust strip */
.trust-strip {
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--surface);
}

.trust-strip__grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.trust-item {
    padding: 1.5rem 1rem;
    text-align: center;
}

.trust-item + .trust-item {
    border-left: 1px solid var(--line);
}

.trust-item strong {
    display: block;
    color: var(--navy-950);
    font-size: 1rem;
}

.trust-item span {
    display: block;
    margin-top: 0.2rem;
    color: var(--ink-600);
    font-size: 0.82rem;
}

/* Card systems */
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
}

.info-card,
.family-card,
.value-card {
    height: 100%;
    padding: clamp(1.4rem, 3vw, 2rem);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}

.info-card h3,
.family-card h3,
.value-card h3 {
    margin-bottom: 0.75rem;
}

.info-card p,
.family-card p,
.value-card p {
    color: var(--ink-600);
}

.family-card {
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.family-card::before {
    width: 100%;
    height: 0.28rem;
    position: absolute;
    top: 0;
    left: 0;
    background: var(--navy-800);
    content: "";
}

.family-card:hover {
    border-color: var(--line-strong);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.family-card__meta {
    margin-bottom: 0.7rem;
    color: var(--orange-700);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.family-card .text-link {
    margin-top: auto;
    padding-top: 1rem;
}

.icon-badge {
    width: 2.75rem;
    height: 2.75rem;
    display: grid;
    place-items: center;
    margin-bottom: 1rem;
    border-radius: 50%;
    background: var(--blue-100);
    color: var(--navy-800);
    font-size: 1.2rem;
    font-weight: 850;
}

.check-list {
    display: grid;
    gap: 0.7rem;
    padding: 0;
    margin: 0;
    list-style: none;
}

.check-list li {
    position: relative;
    padding-left: 1.7rem;
    color: var(--ink-700);
}

.check-list li::before {
    position: absolute;
    left: 0;
    color: var(--green-700);
    content: "✓";
    font-weight: 900;
}

/* Comparison section */
.comparison-layout {
    display: grid;
    grid-template-columns: minmax(0, 0.82fr) minmax(28rem, 1.18fr);
    gap: clamp(2rem, 5vw, 5rem);
    align-items: center;
}

.comparison-copy h2 {
    margin-bottom: 1rem;
}

.comparison-copy p {
    color: var(--ink-600);
}

.comparison-note {
    margin-top: 1.25rem;
    padding: 1rem 1.1rem;
    border-left: 4px solid var(--navy-800);
    background: var(--surface-blue);
    color: var(--ink-700);
    font-size: 0.9rem;
}

.comparison-carousel {
    position: relative;
    min-height: 28rem;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: #eef2f4;
    box-shadow: var(--shadow-md);
}

.comparison-carousel .carousel__slide {
    display: flex;
    flex-direction: column;
    background: var(--surface);
}

.comparison-carousel figure {
    height: 100%;
    display: grid;
    grid-template-rows: minmax(0, 1fr) auto;
    margin: 0;
}

.comparison-carousel img {
    width: 100%;
    height: 100%;
    min-height: 22rem;
    object-fit: contain;
    background: #eef2f4;
}

.comparison-carousel figcaption {
    min-height: 4.8rem;
    padding: 1rem 1.1rem 4.6rem;
    border-top: 1px solid var(--line);
    background: var(--surface);
    color: var(--ink-700);
    font-size: 0.91rem;
}

.comparison-carousel figcaption strong {
    display: block;
    margin-bottom: 0.2rem;
    color: var(--navy-950);
}

/* Split content and CTA */
.split-layout {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(2rem, 6vw, 5rem);
    align-items: center;
}

.split-layout__media {
    overflow: hidden;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.split-layout__media img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.cta-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 2rem;
    align-items: center;
    padding: clamp(1.8rem, 5vw, 3.25rem);
    border-radius: var(--radius-lg);
    background: var(--navy-900);
    color: #fff;
    box-shadow: var(--shadow-md);
}

.cta-panel h2,
.cta-panel h3 {
    margin-bottom: 0.65rem;
    color: #fff;
}

.cta-panel p {
    max-width: 44rem;
    color: #d5e2ec;
}

.cta-panel .button--outline,
.cta-panel .button--outline:visited {
    border-color: #fff;
    color: #fff;
}

.cta-panel .button--outline:hover {
    background: #fff;
    color: var(--navy-950);
}

.cta-panel--spaced {
    margin-top: 2rem;
}

.button-row--center {
    justify-content: center;
}

/* About */
.about-intro-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(18rem, 0.9fr);
    gap: clamp(2rem, 6vw, 5rem);
    align-items: start;
}

.fact-panel {
    padding: 1.5rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface-blue);
}

.fact-list {
    display: grid;
    gap: 0;
    margin: 0;
}

.fact-list > div {
    display: grid;
    grid-template-columns: 8rem 1fr;
    gap: 1rem;
    padding-block: 0.8rem;
    border-bottom: 1px solid var(--line);
}

.fact-list > div:last-child {
    border-bottom: 0;
}

.fact-list dt {
    color: var(--ink-600);
    font-size: 0.86rem;
    font-weight: 750;
}

.fact-list dd {
    margin: 0;
    color: var(--navy-950);
    font-weight: 700;
}

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

.gallery-item {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}

.gallery-item img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    transition: transform 0.35s ease;
}

.gallery-item:hover img {
    transform: scale(1.025);
}

.gallery-item figcaption {
    padding: 0.85rem 1rem;
    color: var(--ink-700);
    font-size: 0.88rem;
    font-weight: 680;
}

.certification-box {
    padding: clamp(1.5rem, 4vw, 2.5rem);
    border: 1px solid #c8d9e5;
    border-radius: var(--radius-md);
    background: var(--surface-blue);
}

.certification-box h2 {
    margin-bottom: 1rem;
}

/* FAQ */
.faq-list {
    display: grid;
    gap: 0.8rem;
}

.faq-item {
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--surface);
}

.faq-item summary {
    position: relative;
    padding: 1.05rem 3.2rem 1.05rem 1.15rem;
    color: var(--navy-950);
    cursor: pointer;
    font-weight: 760;
    list-style: none;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    position: absolute;
    top: 50%;
    right: 1.15rem;
    color: var(--navy-700);
    content: "+";
    font-size: 1.35rem;
    transform: translateY(-50%);
}

.faq-item[open] summary::after {
    content: "−";
}

.faq-item__answer {
    padding: 0 1.15rem 1.15rem;
    color: var(--ink-700);
}

/* Products */
.product-controls {
    position: sticky;
    top: var(--header-height);
    z-index: 30;
    padding-block: 1rem;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 5px 18px rgba(8, 28, 47, 0.06);
    backdrop-filter: blur(10px);
}

.product-controls__top {
    display: grid;
    grid-template-columns: minmax(15rem, 1fr) auto;
    gap: 1rem;
    align-items: end;
}

.search-field {
    position: relative;
}

.search-field label {
    display: block;
    margin-bottom: 0.38rem;
    color: var(--ink-700);
    font-size: 0.83rem;
    font-weight: 760;
}

.search-field input {
    width: 100%;
    min-height: 3rem;
    padding: 0.7rem 2.8rem 0.7rem 0.9rem;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--ink-900);
}

.search-field input:focus {
    border-color: var(--focus);
}

.search-field__icon {
    position: absolute;
    right: 0.9rem;
    bottom: 0.77rem;
    color: var(--ink-500);
    pointer-events: none;
}

.filter-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-top: 0.9rem;
}

.filter-button {
    min-height: 2.5rem;
    padding: 0.55rem 0.85rem;
    border: 1px solid var(--line-strong);
    border-radius: 2rem;
    background: var(--surface);
    color: var(--ink-700);
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 720;
}

.filter-button:hover,
.filter-button[aria-pressed="true"] {
    border-color: var(--navy-800);
    background: var(--navy-800);
    color: #fff;
}

.result-count {
    min-width: 8rem;
    padding-bottom: 0.7rem;
    color: var(--ink-600);
    font-size: 0.9rem;
    text-align: right;
}

.products-section {
    padding-block: clamp(2.5rem, 6vw, 5rem);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

.product-card {
    min-width: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
    scroll-margin-top: calc(var(--header-height) + 9rem);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.product-card:hover,
.product-card:focus-within {
    border-color: var(--line-strong);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.product-card:target {
    border-color: var(--orange-600);
    box-shadow: 0 0 0 4px var(--orange-100), var(--shadow-md);
}

.product-card__image {
    position: relative;
    min-height: 13rem;
    display: grid;
    place-items: center;
    padding: 1rem;
    overflow: hidden;
    border-bottom: 1px solid var(--line);
    background: #f3f5f6;
}

.product-card__image img {
    width: 100%;
    height: 12rem;
    object-fit: contain;
    mix-blend-mode: multiply;
}

.product-card__image.is-missing::after {
    display: grid;
    place-items: center;
    padding: 1rem;
    color: var(--ink-600);
    content: "Product image unavailable";
    font-size: 0.85rem;
    text-align: center;
}

.product-card__image.is-missing img {
    display: none;
}

.product-card__body {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1.1rem;
}

.product-card__series {
    margin-bottom: 0.4rem;
    color: var(--orange-700);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.product-card h2 {
    margin-bottom: 0.55rem;
    font-size: 1.14rem;
}

.product-card__sku {
    margin-bottom: 0.85rem;
    color: var(--ink-600);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    font-size: 0.76rem;
    overflow-wrap: anywhere;
}

.product-card__specs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.35rem;
    margin: 0 0 0.9rem;
}

.product-card__specs div {
    padding: 0.55rem 0.3rem;
    border: 1px solid var(--line);
    border-radius: 0.35rem;
    background: var(--surface-muted);
    text-align: center;
}

.product-card__specs dt {
    color: var(--ink-500);
    font-size: 0.66rem;
    font-weight: 740;
    line-height: 1.2;
    text-transform: uppercase;
}

.product-card__specs dd {
    margin: 0.15rem 0 0;
    color: var(--navy-950);
    font-size: 0.8rem;
    font-weight: 790;
    line-height: 1.2;
}

.product-card__summary {
    flex: 1;
    margin-bottom: 1rem;
    color: var(--ink-600);
    font-size: 0.86rem;
}

.product-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 1rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    min-height: 1.65rem;
    padding: 0.25rem 0.5rem;
    border-radius: 2rem;
    background: var(--green-100);
    color: var(--green-700);
    font-size: 0.7rem;
    font-weight: 780;
    line-height: 1.1;
}

.tag--blue {
    background: var(--blue-100);
    color: var(--navy-800);
}

.product-card__actions {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.5rem;
    margin-top: auto;
}

.product-card__anchor {
    width: 2.85rem;
    min-height: 2.85rem;
    display: grid;
    place-items: center;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    color: var(--navy-800);
    text-decoration: none;
}

.product-card__anchor:hover {
    border-color: var(--navy-800);
    background: var(--surface-blue);
}

.no-results {
    grid-column: 1 / -1;
    padding: 2.5rem 1.5rem;
    border: 1px dashed var(--line-strong);
    border-radius: var(--radius-md);
    background: var(--surface-muted);
    text-align: center;
}

.product-disclaimer {
    margin-top: 2rem;
    padding: 1rem 1.15rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--surface-muted);
    color: var(--ink-700);
    font-size: 0.88rem;
}

/* Product dialog */
.product-dialog {
    width: min(calc(100% - 1.5rem), 59rem);
    max-height: min(90vh, 48rem);
    padding: 0;
    overflow: hidden;
    border: 0;
    border-radius: var(--radius-lg);
    background: var(--surface);
    color: var(--ink-900);
    box-shadow: 0 28px 90px rgba(8, 28, 47, 0.35);
}

.product-dialog::backdrop {
    background: rgba(5, 18, 30, 0.72);
    backdrop-filter: blur(3px);
}

.product-dialog__close {
    position: absolute;
    top: 0.8rem;
    right: 0.8rem;
    z-index: 8;
    width: 2.65rem;
    height: 2.65rem;
    display: grid;
    place-items: center;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.95);
    color: var(--navy-950);
    cursor: pointer;
    font-size: 1.4rem;
}

.product-dialog__layout {
    min-height: 30rem;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(20rem, 0.9fr);
}

.product-dialog__gallery {
    position: relative;
    min-height: 28rem;
    display: grid;
    place-items: center;
    padding: 3.5rem 3.2rem 5rem;
    background: #f2f5f6;
}

.product-dialog__gallery img {
    width: 100%;
    height: 25rem;
    object-fit: contain;
    mix-blend-mode: multiply;
}

.product-dialog__gallery.is-missing::after {
    color: var(--ink-600);
    content: "Product image unavailable";
}

.product-dialog__gallery.is-missing img {
    display: none;
}

.product-dialog__gallery-controls {
    position: absolute;
    right: 1rem;
    bottom: 1rem;
    left: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.product-dialog__gallery-button {
    width: 2.7rem;
    height: 2.7rem;
    display: grid;
    place-items: center;
    padding: 0;
    border: 1px solid var(--line-strong);
    border-radius: 50%;
    background: var(--surface);
    color: var(--navy-900);
    cursor: pointer;
}

.product-dialog__gallery-count {
    padding: 0.35rem 0.65rem;
    border-radius: 2rem;
    background: rgba(255, 255, 255, 0.9);
    color: var(--ink-700);
    font-size: 0.8rem;
    font-weight: 720;
}

.product-dialog__content {
    max-height: min(90vh, 48rem);
    padding: clamp(2rem, 5vw, 3.25rem);
    overflow-y: auto;
}

.product-dialog__series {
    margin-bottom: 0.45rem;
    color: var(--orange-700);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.product-dialog__content h2 {
    padding-right: 2.5rem;
    margin-bottom: 0.45rem;
    font-size: clamp(1.65rem, 4vw, 2.25rem);
}

.product-dialog__sku {
    margin-bottom: 1.2rem;
    color: var(--ink-600);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    font-size: 0.84rem;
    overflow-wrap: anywhere;
}

.product-dialog__specs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.6rem;
    margin: 1.25rem 0;
}

.product-dialog__specs div {
    padding: 0.75rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--surface-muted);
}

.product-dialog__specs dt {
    color: var(--ink-500);
    font-size: 0.72rem;
    font-weight: 740;
    text-transform: uppercase;
}

.product-dialog__specs dd {
    margin: 0.15rem 0 0;
    color: var(--navy-950);
    font-weight: 780;
}

.product-dialog__bullets {
    padding-left: 1.2rem;
    color: var(--ink-700);
    font-size: 0.92rem;
}

.product-dialog__notice {
    margin-block: 1rem;
    padding: 0.75rem 0.85rem;
    border-left: 3px solid var(--orange-600);
    background: var(--orange-100);
    color: var(--ink-700);
    font-size: 0.82rem;
}

/* Documents */
.resource-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
}

.resource-card {
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: clamp(1.4rem, 3vw, 2rem);
    border: 1px solid var(--line);
    border-top: 4px solid var(--navy-800);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}

.resource-card__type {
    margin-bottom: 0.65rem;
    color: var(--orange-700);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.resource-card h2 {
    margin-bottom: 0.75rem;
    font-size: 1.35rem;
}

.resource-card p {
    color: var(--ink-600);
}

.resource-card__meta {
    margin-top: auto;
    padding-top: 1rem;
    color: var(--ink-500);
    font-size: 0.8rem;
}

.resource-card__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-top: 1rem;
}

.resource-card__actions .button {
    flex: 1 1 8rem;
}

.resource-notice {
    margin-top: 2rem;
    padding: 1.1rem 1.2rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--surface-muted);
    color: var(--ink-700);
    font-size: 0.9rem;
}

/* Contact */
.contact-layout {
    display: grid;
    grid-template-columns: minmax(18rem, 0.78fr) minmax(0, 1.22fr);
    gap: clamp(1.5rem, 5vw, 4rem);
    align-items: start;
}

.contact-sidebar {
    display: grid;
    gap: 1rem;
}

.contact-card {
    padding: 1.4rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}

.contact-card h2,
.contact-card h3 {
    margin-bottom: 0.75rem;
}

.contact-details {
    display: grid;
    gap: 0.75rem;
    padding: 0;
    margin: 1rem 0 0;
    list-style: none;
}

.contact-details li {
    color: var(--ink-700);
}

.contact-details strong {
    display: block;
    color: var(--ink-500);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.amazon-card {
    border-color: #efc16e;
    background: #fff9ed;
}

.amazon-button,
.amazon-button:visited {
    border-color: #e3a735;
    background: #f3b847;
    color: #17120a;
}

.amazon-button:hover {
    border-color: #d99d2d;
    background: #e7a936;
    color: #17120a;
}

.contact-form-card {
    padding: clamp(1.4rem, 4vw, 2.5rem);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: var(--shadow-md);
}

.contact-form-card h2 {
    margin-bottom: 0.6rem;
}

.form-note {
    margin-bottom: 1.5rem;
    color: var(--ink-600);
    font-size: 0.9rem;
}

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

.form-field {
    min-width: 0;
}

.form-field--full {
    grid-column: 1 / -1;
}

.form-field label,
.form-field legend {
    display: block;
    margin-bottom: 0.38rem;
    color: var(--ink-700);
    font-size: 0.85rem;
    font-weight: 760;
}

.form-field input,
.form-field select,
.form-field textarea {
    width: 100%;
    min-height: 2.9rem;
    padding: 0.7rem 0.8rem;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--ink-900);
}

.form-field textarea {
    min-height: 9rem;
    resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    border-color: var(--focus);
}

.form-help {
    margin-top: 0.35rem;
    color: var(--ink-500);
    font-size: 0.76rem;
}

.required {
    color: var(--danger);
}

.honeypot {
    position: absolute;
    left: -10000px;
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-top: 1.25rem;
}

.form-status {
    min-height: 1.5rem;
    margin-top: 0.75rem;
    color: var(--ink-700);
    font-size: 0.88rem;
}

.form-status.is-success {
    color: var(--green-700);
}

.form-status.is-error {
    color: var(--danger);
}

/* Policy pages */
.prose {
    color: var(--ink-700);
}

.prose h2 {
    margin-top: 2.5rem;
    margin-bottom: 0.85rem;
    font-size: 1.65rem;
}

.prose h3 {
    margin-top: 1.75rem;
    margin-bottom: 0.65rem;
    font-size: 1.2rem;
}

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

.prose .notice {
    margin-block: 1.5rem;
    padding: 1rem 1.1rem;
    border-left: 4px solid var(--navy-800);
    background: var(--surface-blue);
}

/* Footer */
.site-footer {
    margin-top: auto;
    background: var(--navy-950);
    color: #d5e2ec;
}

.site-footer__main {
    display: grid;
    grid-template-columns: minmax(15rem, 1.5fr) repeat(2, minmax(10rem, 0.75fr));
    gap: 2.5rem;
    padding-block: 3rem;
}

.site-footer .brand,
.site-footer .brand:visited {
    color: #fff;
}

.site-footer .brand__mark {
    background: #fff;
    color: var(--navy-950);
}

.site-footer .brand__tagline {
    color: #aebfcb;
}

.site-footer__summary {
    max-width: 31rem;
    margin-top: 1rem;
    color: #b9c8d3;
    font-size: 0.9rem;
}

.site-footer h2 {
    margin-bottom: 0.85rem;
    color: #fff;
    font-size: 0.82rem;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.footer-links {
    display: grid;
    gap: 0.48rem;
    padding: 0;
    margin: 0;
    list-style: none;
}

.footer-links a {
    color: #d5e2ec;
    font-size: 0.9rem;
    text-decoration: none;
}

.footer-links a:hover {
    color: #fff;
    text-decoration: underline;
}

.site-footer__bottom {
    padding-block: 1rem 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
    color: #9fb2c0;
    font-size: 0.76rem;
}

.site-footer__bottom-inner {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.site-footer__bottom p {
    margin: 0;
}

/* 404 */
.not-found {
    min-height: 65vh;
    display: grid;
    place-items: center;
    padding-block: 4rem;
    text-align: center;
}

.not-found__code {
    display: block;
    margin-bottom: 0.4rem;
    color: var(--orange-700);
    font-size: clamp(4rem, 15vw, 8rem);
    font-weight: 850;
    letter-spacing: -0.07em;
    line-height: 0.9;
}

/* Responsive */
@media (max-width: 70rem) {
    .product-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 58rem) {
    :root {
        --header-height: 4.25rem;
    }

    .utility-bar {
        display: none;
    }

    .site-header__inner {
        min-height: var(--header-height);
        flex-wrap: wrap;
    }

    .primary-nav {
        width: 100%;
        position: static;
        display: grid;
        gap: 0.15rem;
        padding: 0.6rem 0 1rem;
        background: var(--surface);
    }

    .js .nav-toggle {
        display: grid;
    }

    .js .primary-nav {
        width: auto;
        max-height: 0;
        position: fixed;
        top: var(--header-height);
        right: 0;
        left: 0;
        padding: 0 1rem;
        overflow: hidden;
        border-bottom: 1px solid transparent;
        box-shadow: var(--shadow-md);
        opacity: 0;
        visibility: hidden;
        transition: max-height 0.28s ease, padding 0.28s ease, opacity 0.2s ease, visibility 0.2s ease;
    }

    .js .primary-nav.is-open {
        max-height: 32rem;
        padding-top: 0.8rem;
        padding-bottom: 1rem;
        border-bottom-color: var(--line);
        opacity: 1;
        visibility: visible;
    }

    .primary-nav__link {
        padding: 0.75rem 0.8rem;
    }

    .primary-nav .button {
        width: 100%;
        margin: 0.45rem 0 0;
    }

    .home-hero__grid {
        min-height: 0;
        grid-template-columns: 1fr;
    }

    .home-hero__content {
        padding: 3.5rem max(1rem, calc((100vw - var(--content)) / 2));
    }

    .hero-carousel {
        min-height: clamp(22rem, 55vw, 34rem);
        order: -1;
    }

    .trust-strip__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .trust-item:nth-child(3) {
        border-left: 0;
        border-top: 1px solid var(--line);
    }

    .trust-item:nth-child(4) {
        border-top: 1px solid var(--line);
    }

    .comparison-layout,
    .about-intro-grid,
    .contact-layout,
    .split-layout {
        grid-template-columns: 1fr;
    }

    .comparison-carousel {
        min-height: 25rem;
    }

    .card-grid,
    .resource-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .product-controls {
        top: var(--header-height);
    }

    .product-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .product-dialog__layout {
        grid-template-columns: 1fr;
    }

    .product-dialog__gallery {
        min-height: 20rem;
        padding: 3rem 3rem 4.5rem;
    }

    .product-dialog__gallery img {
        height: 18rem;
    }

    .product-dialog__content {
        max-height: none;
    }

    .cta-panel {
        grid-template-columns: 1fr;
    }

    .site-footer__main {
        grid-template-columns: 1.25fr 0.75fr 0.75fr;
    }
}

@media (max-width: 42rem) {
    .container,
    .container--narrow {
        width: min(calc(100% - 1.25rem), var(--content));
    }

    .brand__tagline {
        display: none;
    }

    .brand__name {
        font-size: 1.2rem;
    }

    .home-hero__content {
        padding-inline: 1rem;
    }

    .home-hero__content h1 {
        max-width: none;
    }

    .hero-checks {
        grid-template-columns: 1fr;
    }

    .button-row .button {
        width: 100%;
    }

    .card-grid,
    .resource-grid,
    .product-grid,
    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .product-controls__top {
        grid-template-columns: 1fr;
    }

    .result-count {
        min-width: 0;
        padding: 0;
        text-align: left;
    }

    .filter-group {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .filter-button {
        width: 100%;
    }

    .product-card__image {
        min-height: 15rem;
    }

    .product-card__image img {
        height: 14rem;
    }

    .product-dialog {
        width: calc(100% - 0.75rem);
        max-height: 94vh;
        border-radius: var(--radius-md);
    }

    .product-dialog__gallery {
        min-height: 17rem;
        padding: 3rem 2.5rem 4.25rem;
    }

    .product-dialog__gallery img {
        height: 14rem;
    }

    .product-dialog__content {
        padding: 1.35rem;
    }

    .comparison-carousel img {
        min-height: 17rem;
    }

    .comparison-carousel figcaption {
        padding-bottom: 4.75rem;
    }

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

    .form-field--full {
        grid-column: auto;
    }

    .site-footer__main {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .site-footer__bottom-inner {
        flex-direction: column;
    }
}

@media (max-width: 28rem) {
    .filter-group {
        grid-template-columns: 1fr;
    }

    .trust-strip__grid {
        grid-template-columns: 1fr;
    }

    .trust-item + .trust-item,
    .trust-item:nth-child(3),
    .trust-item:nth-child(4) {
        border-top: 1px solid var(--line);
        border-left: 0;
    }

    .product-card__actions {
        grid-template-columns: 1fr;
    }

    .product-card__anchor {
        width: 100%;
    }
}

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

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}

@media print {
    .utility-bar,
    .site-header,
    .breadcrumb,
    .product-controls,
    .button,
    .site-footer,
    .carousel__controls,
    .product-dialog {
        display: none !important;
    }

    body {
        color: #000;
        background: #fff;
        font-size: 11pt;
    }

    a {
        color: #000;
        text-decoration: none;
    }

    .section,
    .products-section {
        padding-block: 1rem;
    }

    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .product-card {
        break-inside: avoid;
        box-shadow: none;
    }
}
/* ===== N-HTB v2: independent product pages and mobile product UX ===== */
.filter-toggle {
    min-height: 3rem;
    display: none;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--navy-900);
    cursor: pointer;
    font-size: 0.86rem;
    font-weight: 760;
    white-space: nowrap;
}
.filter-toggle::after { content: "▾"; font-size: 0.72rem; transition: transform 0.2s ease; }
.filter-toggle[aria-expanded="true"]::after { transform: rotate(180deg); }
.product-card__title-link { color: inherit; text-decoration: none; }
.product-card__title-link:hover { color: var(--orange-700); }
.product-card__quick {
    min-width: 6rem;
    min-height: 2.85rem;
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--navy-800);
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 760;
}
.product-card__quick:hover { border-color: var(--navy-800); background: var(--surface-blue); }
.product-card__actions--single { grid-template-columns: 1fr; }
.dialog-is-open { overflow: hidden; }
.product-dialog__cert-link { margin: -0.2rem 0 1.15rem; font-size: 0.85rem; }

/* Certification scope */
.certification-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.certification-card {
    min-width: 0;
    padding: clamp(1.4rem, 3vw, 2rem);
    border: 1px solid var(--line);
    border-top: 5px solid var(--navy-800);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}
.certification-card--component { border-top-color: var(--orange-600); }
.certification-card__type { margin-bottom: 0.55rem; color: var(--ink-500); font-size: 0.73rem; font-weight: 820; letter-spacing: 0.08em; text-transform: uppercase; }
.certification-card h3 { margin-bottom: 0.85rem; font-size: clamp(1.25rem, 2.5vw, 1.65rem); }
.certification-card h3 span { color: var(--ink-600); font-size: 0.76em; font-weight: 700; }
.certification-card p:not(.certification-card__type) { color: var(--ink-700); }
.certification-summary { margin-top: 1.5rem; padding: 1.2rem 1.35rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface-blue); }
.certification-summary h2 { margin-bottom: 0.45rem; font-size: 1.35rem; }
.certification-summary p { margin-bottom: 0.55rem; color: var(--ink-700); }
.certification-summary--compact { font-size: 0.91rem; }
.center-link { margin-top: 1.4rem; text-align: center; }
.verification-steps { display: grid; gap: 0.8rem; padding: 0; counter-reset: verify; list-style: none; }
.verification-steps li { position: relative; min-height: 4.6rem; padding: 1rem 1rem 1rem 4.4rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); counter-increment: verify; }
.verification-steps li::before { position: absolute; top: 0.85rem; left: 1rem; width: 2.55rem; height: 2.55rem; display: grid; place-items: center; border-radius: 50%; background: var(--navy-900); color: #fff; content: counter(verify); font-weight: 800; }
.verification-steps strong, .verification-steps span { display: block; }
.verification-steps span { color: var(--ink-600); }
.certification-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-md); }
.certification-table { width: 100%; min-width: 45rem; border-collapse: collapse; background: var(--surface); }
.certification-table th, .certification-table td { padding: 1rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.certification-table th { background: var(--navy-900); color: #fff; font-size: 0.83rem; letter-spacing: 0.03em; }
.certification-table tbody tr:last-child td { border-bottom: 0; }

/* Permanent product pages */
.product-detail__layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(21rem, 0.95fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: start; }
.product-gallery { min-width: 0; }
.product-gallery__main { min-height: 32rem; display: grid; place-items: center; padding: clamp(1.5rem, 4vw, 3rem); border: 1px solid var(--line); border-radius: var(--radius-lg); background: #f2f5f6; }
.product-gallery__main img { width: 100%; height: 29rem; object-fit: contain; mix-blend-mode: multiply; }
.product-gallery__main img.is-missing { visibility: hidden; }
.product-gallery__thumbs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.65rem; margin-top: 0.75rem; }
.product-gallery__thumb { min-width: 0; height: 7rem; display: grid; place-items: center; padding: 0.55rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); cursor: pointer; }
.product-gallery__thumb[aria-pressed="true"] { border-color: var(--navy-800); box-shadow: inset 0 0 0 2px var(--navy-800); }
.product-gallery__thumb img { width: 100%; height: 5.7rem; object-fit: contain; mix-blend-mode: multiply; }
.product-detail__content { position: sticky; top: calc(var(--header-height) + 1.5rem); }
.product-detail__content h1 { margin-bottom: 0.45rem; font-size: clamp(2.15rem, 5vw, 3.8rem); }
.product-detail__sku { margin-bottom: 1rem; color: var(--ink-600); font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace; overflow-wrap: anywhere; }
.product-detail__specs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.55rem; margin: 1.25rem 0; }
.product-detail__specs div { min-width: 0; padding: 0.75rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface-muted); }
.product-detail__specs dt { color: var(--ink-500); font-size: 0.7rem; font-weight: 760; text-transform: uppercase; }
.product-detail__specs dd { margin: 0.15rem 0 0; color: var(--navy-950); font-weight: 780; overflow-wrap: anywhere; }
.product-grid--related { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.product-grid--series { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* Make the dialog itself reliably scrollable on tablet and phone. */
@media (max-width: 58rem) {
    .certification-grid, .product-detail__layout { grid-template-columns: 1fr; }
    .product-detail__content { position: static; }
    .product-dialog__layout { max-height: min(90dvh, 48rem); display: flex; flex-direction: column; overflow-y: auto; overscroll-behavior: contain; -webkit-overflow-scrolling: touch; }
    .product-dialog__gallery { flex: 0 0 auto; }
    .product-dialog__content { flex: 0 0 auto; max-height: none; overflow: visible; }
    .product-grid--series { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .product-grid--related { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 42rem) {
    /* Compact, non-sticky mobile search. It no longer blocks half of the viewport. */
    .product-controls { position: static; top: auto; padding-block: 0.65rem; box-shadow: 0 3px 12px rgba(8, 28, 47, 0.05); backdrop-filter: none; }
    .product-controls__top { grid-template-columns: minmax(0, 1fr) auto; gap: 0.55rem; align-items: center; }
    .search-field label { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
    .search-field input { min-height: 2.8rem; padding-block: 0.55rem; }
    .search-field__icon { bottom: 0.65rem; }
    .filter-toggle { display: inline-flex; min-height: 2.8rem; max-width: 9.2rem; overflow: hidden; text-overflow: ellipsis; }
    .result-count { grid-column: 1 / -1; min-width: 0; padding: 0; color: var(--ink-500); font-size: 0.77rem; line-height: 1.2; text-align: left; }
    .js .filter-group { display: none; margin-top: 0.55rem; }
    .js .filter-group.is-open { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .filter-button { min-height: 2.35rem; padding: 0.45rem 0.55rem; font-size: 0.78rem; }
    .products-section { padding-top: 1rem; }
    .product-card__image { min-height: 12rem; }
    .product-card__image img { height: 11rem; }
    .product-card__actions { grid-template-columns: minmax(0, 1fr) auto; }
    .product-card__quick { min-width: 5.4rem; padding-inline: 0.55rem; }

    /* Full-height mobile quick view with one scroll container. */
    .product-dialog { width: 100%; height: 100dvh; max-height: 100dvh; margin: 0; border-radius: 0; }
    .product-dialog__layout { width: 100%; height: 100%; max-height: 100%; padding-bottom: env(safe-area-inset-bottom); overflow-y: auto; overscroll-behavior-y: contain; -webkit-overflow-scrolling: touch; }
    .product-dialog__gallery { min-height: 15.5rem; padding: 3rem 2rem 4rem; }
    .product-dialog__gallery img { height: 12.5rem; }
    .product-dialog__content { padding: 1.2rem 1rem calc(1.5rem + env(safe-area-inset-bottom)); }
    .product-dialog__close { position: fixed; top: max(0.65rem, env(safe-area-inset-top)); right: 0.65rem; }
    .product-dialog__content h2 { padding-right: 2.8rem; }
    .product-dialog__specs { grid-template-columns: repeat(2, minmax(0, 1fr)); }

    .product-gallery__main { min-height: 20rem; padding: 1rem; }
    .product-gallery__main img { height: 18rem; }
    .product-gallery__thumb { height: 5.5rem; padding: 0.35rem; }
    .product-gallery__thumb img { height: 4.6rem; }
    .product-detail__specs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .product-grid--series, .product-grid--related { grid-template-columns: 1fr; }
    .certification-card { padding: 1.25rem; }
    .verification-steps li { padding-left: 3.8rem; }
    .verification-steps li::before { left: 0.75rem; }
}

@media (max-width: 28rem) {
    .js .filter-group.is-open { grid-template-columns: 1fr; }
    .product-card__actions, .product-detail__specs, .product-dialog__specs { grid-template-columns: 1fr; }
    .product-card__quick { width: 100%; }
    .product-gallery__main { min-height: 17rem; }
    .product-gallery__main img { height: 15rem; }
}