@font-face {
        font-family: "BPG Nino Mtavruli";
        src: url("BPGNinoMtavruli.woff2") format("woff2"),
             url("BPGNinoMtavruli.woff") format("woff");
        font-weight: 400;
        font-style: normal;
        font-display: swap;
    }

    @font-face {
        font-family: "BPG Nino Mtavruli";
        src: url("BPGNinoMtavruli-Bold.woff2") format("woff2"),
             url("BPGNinoMtavruli-Bold.woff") format("woff");
        font-weight: 700;
        font-style: normal;
        font-display: swap;
    }

    :root {
        --ink: #181818;
        --muted: #55565a;
        --line: #e0e0e0;
        --paper: #f5f5f5;
        --surface: #e0e0e0;
        --accent: #8f1d24;
        --accent-dark: #661016;
        --teal: #0f6f68;
        --teal-soft: #e7f3f1;
        --gold-soft: #fff4d7;
        --shadow: 0 18px 45px rgba(34, 24, 18, 0.08);
    }

    * {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        margin: 0;
        background: var(--paper);
        color: var(--ink);
        font-family: "BPG Nino Mtavruli", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
        line-height: 1.65;
    }

    img {
        display: block;
        max-width: 100%;
        height: auto;
    }

    a {
        color: inherit;
    }

    p {
        margin: 0 0 1rem;
    }

    h1,
    h2,
    h3 {
        margin: 0;
        line-height: 1.25;
    }

    h1 {
        font-size: 2.35rem;
    }

    h2 {
        font-size: 1.85rem;
    }

    h3 {
        font-size: 1.2rem;
    }

    .skip-link {
        position: absolute;
        top: 0.75rem;
        left: 0.75rem;
        z-index: 100;
        transform: translateY(-150%);
        background: var(--ink);
        color: #fff;
        padding: 0.75rem 1rem;
        border-radius: 6px;
        text-decoration: none;
    }

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

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

    .container {
        width: 90%;
        max-width: 1200px;
        margin-inline: auto;
    }

    .site-header {
        position: fixed;
        width: 100%;
        top: 0;
        z-index: 1000;
        background: rgba(245, 245, 245, 0.9);
        backdrop-filter: blur(15px);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 1.5rem;
        padding: 15px 0;
    }

    .brand {
        display: inline-flex;
        align-items: center;
        gap: 0.75rem;
        min-width: 12.5rem;
        text-decoration: none;
        font-weight: 700;
    }

    .brand img {
        width: 200px;
        max-height: 60px;
        object-fit: contain;
        height: auto;
    }

    .menu-toggle {
        display: none;
        width: 44px;
        height: 44px;
        align-items: center;
        justify-content: center;
        flex-direction: column;
        gap: 5px;
        border: 0;
        border-radius: 6px;
        background: transparent;
        cursor: pointer;
    }

    .menu-toggle span {
        display: block;
        width: 25px;
        height: 3px;
        border-radius: 3px;
        background: #777;
        transition: transform 0.2s ease, opacity 0.2s ease, background-color 0.2s ease;
    }

    .menu-toggle:hover span,
    .menu-toggle:focus-visible span {
        background: var(--accent);
    }

    .menu-toggle[aria-expanded="true"] span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .menu-toggle[aria-expanded="true"] span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle[aria-expanded="true"] span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .nav-list {
        display: flex;
        align-items: center;
        justify-content: flex-end;
        flex-wrap: wrap;
        gap: 30px;
        margin: 0;
        padding: 0;
        list-style: none;
    }

    .nav-list a {
        display: inline-flex;
        align-items: center;
        min-height: 2.5rem;
        padding: 0;
        color: var(--muted);
        text-decoration: none;
        font-size: 1.2rem;
    }

    .nav-list a:hover,
    .nav-list a:focus-visible {
        color: var(--ink);
        outline: 2px solid transparent;
    }

    .hero {
        padding: 8rem 0 3rem;
        background:
            linear-gradient(120deg, rgba(245, 245, 245, 0.96), rgba(224, 224, 224, 0.75)),
            var(--surface);
    }

    .hero-grid {
        display: grid;
        gap: clamp(1.5rem, 4vw, 3rem);
        align-items: center;
        grid-template-areas:
            "title"
            "media"
            "copy";
    }

    .hero-title {
        grid-area: title;
        max-width: 620px;
        margin: 0;
        color: var(--ink);
    }

    .hero-copy {
        grid-area: copy;
        max-width: 620px;
        margin: 0;
        color: var(--ink);
    }

    .hero-title > *,
    .hero-copy > * {
        max-width: none;
    }

    .eyebrow {
        display: inline-flex;
        align-items: center;
        width: fit-content;
        margin-bottom: 1rem;
        padding: 0.35rem 0.7rem;
        border: 1px solid var(--line);
        border-radius: 6px;
        background: #fff;
        color: var(--accent);
        font-size: 0.9rem;
        font-weight: 700;
    }

    .lead {
        color: var(--muted);
        font-size: 1.1rem;
        margin-top: 1rem;
    }

    .answer-box {
        margin-top: 1.25rem;
        padding: 1rem;
        border-left: 4px solid var(--teal);
        background: var(--teal-soft);
        border-radius: 0 8px 8px 0;
    }

    .answer-box p {
        margin: 0;
    }

    .actions {
        display: flex;
        flex-wrap: wrap;
        gap: 0.75rem;
        margin-top: 1.5rem;
    }

    .button {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 2.9rem;
        padding: 0.75rem 1rem;
        border: 1px solid transparent;
        border-radius: 8px;
        text-decoration: none;
        font-weight: 700;
    }

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

    .button-primary:hover,
    .button-primary:focus-visible {
        background: var(--accent-dark);
    }

    .button-secondary {
        background: #fff;
        color: var(--accent);
        border-color: var(--line);
    }

    .button-secondary:hover,
    .button-secondary:focus-visible {
        border-color: var(--accent);
    }

    .hero-figure {
        grid-area: media;
        margin: 0;
        overflow: hidden;
        border: 0;
        border-radius: 8px;
        background: transparent;
        box-shadow: var(--shadow);
    }

    .hero-figure::after {
        display: none;
    }

    .hero-figure img {
        display: block;
        width: min(560px, 100%);
        height: auto;
        aspect-ratio: 1672 / 941;
        object-fit: contain;
        background: #fff;
        margin-right: auto;
        border-radius: inherit;
    }

    .hero-figure figcaption {
        max-width: 560px;
        padding: 0.75rem 0 0;
        color: rgba(35, 31, 32, 0.82);
        font-size: 0.95rem;
        text-align: left;
    }

    main section {
        padding: 3rem 0;
    }

    .section-intro {
        max-width: 760px;
        margin-bottom: 1.5rem;
    }

    .section-intro p {
        color: var(--muted);
        margin-top: 0.75rem;
    }

    .grid {
        display: grid;
        gap: 1rem;
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .panel,
    .card {
        border: 1px solid var(--line);
        border-radius: 8px;
        background: #fff;
        box-shadow: 0 8px 24px rgba(34, 24, 18, 0.05);
    }

    .panel {
        padding: 1.25rem;
    }

    .card {
        padding: 1rem;
    }

    .card h3,
    .panel h3 {
        margin-bottom: 0.55rem;
    }

    .card p,
    .panel p {
        color: var(--muted);
    }

    .problem {
        background: #fff;
    }

    .problem-list {
        margin: 1rem 0 0;
        padding-left: 1.2rem;
        color: var(--muted);
    }

    .steps {
        counter-reset: fortunato-step;
    }

    .step {
        position: relative;
        padding-left: 3.2rem;
    }

    .step::before {
        counter-increment: fortunato-step;
        content: counter(fortunato-step);
        position: absolute;
        top: 1rem;
        left: 1rem;
        display: inline-grid;
        width: 1.65rem;
        height: 1.65rem;
        place-items: center;
        border-radius: 50%;
        background: var(--accent);
        color: #fff;
        font-weight: 700;
        line-height: 1;
    }

    .visuals {
        background: var(--surface);
    }

    .logo-section {
        background: #fff;
    }

    .logo-showcase {
        margin: 0;
        padding: clamp(1.5rem, 4vw, 3rem);
        background: #fff;
        text-align: center;
    }

    .logo-showcase img {
        display: block;
        width: min(560px, 100%);
        height: auto;
        margin: 0 auto;
        object-fit: contain;
    }

    .logo-showcase figcaption {
        max-width: 680px;
        margin: 1rem auto 0;
        color: var(--muted);
        font-size: 1rem;
    }

    .image-card {
        overflow: hidden;
        padding: 0;
    }

    .image-card img {
        width: 100%;
        aspect-ratio: 1 / 1;
        object-fit: cover;
    }

    .image-card figcaption {
        padding: 0.9rem 1rem 1rem;
        color: var(--muted);
    }

    .valve-section {
        background: #fff;
    }

    .valve-layout {
        display: grid;
        gap: 1rem;
    }

    .valve-photo {
        overflow: hidden;
        margin: 0;
        border: 1px solid var(--line);
        border-radius: 8px;
        background: #fff;
        box-shadow: 0 8px 24px rgba(34, 24, 18, 0.05);
    }

    .valve-photo img {
        width: 100%;
        aspect-ratio: 4 / 3;
        object-fit: contain;
        background: #fff;
    }

    .valve-photo figcaption {
        padding: 0.9rem 1rem 1rem;
        color: var(--muted);
    }

    .spec-wrap {
        overflow-x: auto;
        border: 1px solid var(--line);
        border-radius: 8px;
        background: #fff;
    }

    table {
        width: 100%;
        min-width: 680px;
        border-collapse: collapse;
    }

    caption {
        padding: 1rem;
        color: var(--muted);
        text-align: left;
    }

    th,
    td {
        padding: 0.9rem 1rem;
        border-top: 1px solid var(--line);
        text-align: left;
        vertical-align: top;
    }

    th {
        background: var(--gold-soft);
        color: var(--accent-dark);
        font-weight: 700;
    }

    td {
        color: var(--muted);
    }

    .faq-list {
        display: grid;
        gap: 0.85rem;
    }

    .faq-item {
        padding: 1rem;
        border: 1px solid var(--line);
        border-radius: 8px;
        background: #fff;
    }

    .faq-item h3 {
        margin-bottom: 0.45rem;
    }

    .cta {
        background: var(--teal-soft);
    }

    .contact-box {
        display: grid;
        gap: 1rem;
        padding: 1.25rem;
        border: 1px solid #c9e3df;
        border-radius: 8px;
        background: #fff;
    }

    .contact-links {
        display: flex;
        flex-wrap: wrap;
        gap: 0.7rem;
    }

    .text-link {
        color: var(--accent);
        font-weight: 700;
        text-decoration-thickness: 2px;
        text-underline-offset: 0.2em;
    }

    .site-footer {
        background-color: #0a0a0a;
        color: #fff;
        padding: 40px 0 20px;
        margin-top: 60px;
    }

    .footer-content {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
        display: flex;
        flex-direction: column;
    }

    .footer-top {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding-bottom: 20px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        margin-bottom: 20px;
    }

    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

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

    .footer-links a {
        color: #fff;
        text-decoration: none;
        transition: color 0.3s;
    }

    .footer-links a:hover,
    .footer-links a:focus-visible {
        color: #ed1919;
    }

    .footer-contact {
        display: flex;
        align-items: center;
        gap: 15px;
    }

    .footer-email {
        color: #fff;
    }

    .social-icons {
        display: flex;
        gap: 15px;
    }

    .social-icons a {
        color: #fff;
        text-decoration: none;
        transition: color 0.3s;
    }

    .social-icons a:hover,
    .social-icons a:focus-visible {
        color: #ed1919;
    }

    @media (min-width: 760px) {
        h1 {
            font-size: 3rem;
        }

        .hero {
            padding: 9rem 0 4rem;
        }

        .hero-grid {
            grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.1fr);
            grid-template-areas:
                "media title"
                "media copy";
        }

        .grid-2 {
            grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
        }

        .grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }

        .valve-layout {
            grid-template-columns: 0.9fr 1.1fr;
            align-items: start;
        }

    }

    @media (max-width: 640px) {
        .site-header {
            position: sticky;
        }

        .header-inner {
            align-items: center;
            flex-direction: row;
            flex-wrap: wrap;
            padding: 10px 0;
        }

        .brand {
            min-width: 0;
        }

        .brand img {
            width: 170px;
        }

        .menu-toggle {
            display: inline-flex;
            margin-left: auto;
        }

        .main-nav {
            display: none;
            width: 100%;
            padding: 10px 0 5px;
            border-top: 1px solid rgba(0, 0, 0, 0.08);
        }

        .main-nav.is-open {
            display: block;
        }

        .nav-list {
            flex-direction: column;
            align-items: stretch;
            gap: 0;
        }

        .nav-list a {
            font-size: 1rem;
            min-height: 2.75rem;
            padding: 0.45rem 0;
            justify-content: center;
        }

        .hero-figure figcaption {
            max-width: none;
            padding: 0.75rem 0 0;
        }

        .hero-copy {
            margin-top: 0;
        }

        .actions,
        .contact-links {
            flex-direction: column;
        }

        .button {
            width: 100%;
        }

        .footer-top,
        .footer-bottom {
            flex-direction: column;
            gap: 15px;
            text-align: center;
        }

        .footer-links {
            flex-direction: column;
            gap: 10px;
        }

        .footer-contact {
            flex-direction: column;
        }
    }