.firmware-page {
    min-height: 100vh;
    color: var(--artelv-color-text);
    background:
        radial-gradient(circle at 8% 4%, rgba(40, 114, 73, 0.08), transparent 27rem),
        linear-gradient(180deg, var(--artelv-color-surface) 0, var(--artelv-color-card) 42rem);
    font-family: var(--artelv-font-main);
    font-size: 17px;
    line-height: 1.7;
}

.firmware-article {
    width: auto;
    min-width: 0;
    margin: 0;
    padding: 0;
    color: var(--artelv-color-text);
    font-family: var(--artelv-font-main);
    font-size: 17px;
    line-height: 1.7;
    overflow-wrap: anywhere;
}

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

.firmware-article h2,
.firmware-article h3,
.firmware-article p,
.firmware-article ul,
.firmware-article ol {
    margin-top: 0;
}

.firmware-article h2 {
    margin-bottom: 28px;
    color: var(--artelv-color-heading);
    font-family: var(--artelv-font-accent);
    font-size: clamp(23px, 2.4vw, 32px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.035em;
    text-wrap: balance;
}

.firmware-article h3 {
    margin-bottom: 18px;
    color: var(--artelv-color-heading);
    font-family: var(--artelv-font-main);
    font-size: clamp(18px, 2vw, 24px);
    font-weight: 700;
    line-height: 1.3;
}

.firmware-article p {
    margin-bottom: 16px;
}

.firmware-article a {
    color: var(--artelv-color-accent);
    font-weight: 600;
    text-decoration-thickness: 1px;
    text-underline-offset: 4px;
    transition: color 0.2s ease;
}

.firmware-article a:hover,
.firmware-article a:focus-visible {
    color: var(--artelv-color-heading);
}

.firmware-article ul,
.firmware-article ol {
    margin-bottom: 0;
    padding: 0;
    list-style: none;
}

.firmware-article li {
    position: relative;
    --firmware-list-item-offset: 0px;
}

.firmware-article li + li {
    margin-top: 12px;
}

.firmware-article ul > li {
    padding-left: 28px;
}

.firmware-article ul > li::before {
    position: absolute;
    top: calc(var(--firmware-list-item-offset) + 0.82em);
    left: 2px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--artelv-color-accent);
    content: "";
    transform: translateY(-50%);
}

.firmware-article ol {
    counter-reset: firmware-list;
}

.firmware-article ol > li {
    min-width: 0;
    padding-left: 36px;
    counter-increment: firmware-list;
}

.firmware-article ol > li::before {
    position: absolute;
    top: 0;
    left: 0;
    width: 26px;
    color: var(--artelv-color-accent);
    font-weight: 700;
    content: counter(firmware-list) ".";
}

.firmware-hero {
    margin-bottom: 72px;
}

.firmware-hero h2 {
    margin-bottom: 30px;
    padding-top: 25px;
    font-size: clamp(26px, 3.2vw, 42px);
    line-height: 1.06;
    letter-spacing: -0.035em;
}

.firmware-hero p {
    margin-bottom: 0;
    color: var(--artelv-color-muted);
    font-size: inherit;
    line-height: inherit;
}

.firmware-video {
    margin-bottom: 42px;
}

.firmware-video__frame {
    overflow: hidden;
    border-radius: calc(var(--artelv-radius-card) * 2);
    background: var(--artelv-color-heading);
    box-shadow: var(--artelv-shadow-form);
}

.firmware-video iframe {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    border: 0;
}

.firmware-warning {
    position: relative;
    margin: 42px 0 76px;
    padding: 34px 36px 32px 90px;
    border: 1px solid rgba(199, 68, 58, 0.22);
    border-radius: calc(var(--artelv-radius-card) * 2);
    background: linear-gradient(135deg, #fff 0%, #fcf4f2 100%);
    box-shadow: var(--artelv-shadow-card);
}

.firmware-warning::before {
    position: absolute;
    top: 35px;
    left: 34px;
    display: grid;
    width: 38px;
    height: 38px;
    place-items: center;
    border: 2px solid var(--artelv-color-danger);
    border-radius: 50%;
    color: var(--artelv-color-danger);
    font-size: 22px;
    font-weight: 800;
    line-height: 1;
    content: "!";
}

.firmware-warning__title {
    margin-bottom: 20px;
    color: var(--artelv-color-heading);
    font-size: 22px;
    font-weight: 800;
}

.firmware-warning__danger {
    margin: 24px 0 0 !important;
    color: var(--artelv-color-danger);
    font-weight: 700;
}

.firmware-process {
    margin-bottom: 84px;
}

.firmware-step {
    position: relative;
    margin-top: 22px;
    overflow: hidden;
    border: 1px solid var(--artelv-color-border);
    border-radius: calc(var(--artelv-radius-card) * 2);
    background: var(--artelv-color-card);
    box-shadow: var(--artelv-shadow-card);
}

.firmware-step__number {
    position: absolute;
    top: 28px;
    left: 30px;
    z-index: 1;
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border-radius: 50%;
    color: var(--artelv-color-card);
    background: var(--artelv-color-accent);
    font-size: 16px;
    font-weight: 800;
}

.firmware-step h3 {
    margin: 0;
    padding: 31px 34px 26px 92px;
}

.firmware-step > :not(h3):not(.firmware-step__number) {
    margin-right: 34px;
    margin-left: 92px;
}

.firmware-step > :last-child {
    margin-bottom: 32px;
}

.firmware-step > ol {
    display: grid;
    gap: 11px;
    margin-top: 2px;
}

.firmware-step > ol li {
    padding: 12px 16px 12px 48px;
    border-radius: var(--artelv-radius-card);
    background: var(--artelv-color-surface);
}

.firmware-step > ol li + li {
    margin-top: 0;
}

.firmware-step > ol li::before {
    top: 12px;
    left: 20px;
}

.firmware-note {
    margin-top: 30px;
    padding: 16px 18px;
    border-left: 4px solid var(--artelv-color-accent);
    border-radius: 0 var(--artelv-radius-card) var(--artelv-radius-card) 0;
    background: var(--artelv-color-surface-warm);
}

.firmware-step > .firmware-note {
    margin-top: 30px;
}

.firmware-versions {
    margin-bottom: 84px;
}

.firmware-version {
    position: relative;
    margin-top: 28px;
    padding: 0 34px 30px;
    border-left: 3px solid var(--artelv-color-border);
}

.firmware-version.is-latest {
    border: 1px solid rgba(40, 114, 73, 0.2);
    border-left: 5px solid var(--artelv-color-accent);
    border-radius: 0 var(--artelv-radius-card) var(--artelv-radius-card) 0;
    background: var(--artelv-color-surface);
}

.firmware-version h2 {
    margin-bottom: 27px;
    padding-top: 32px;
    font-size: clamp(22px, 2.7vw, 30px);
}

.firmware-version li {
    --firmware-list-item-offset: 10px;
    padding-top: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--artelv-color-border);
}

.firmware-version li:last-child {
    border-bottom: 0;
}

.firmware-version li strong {
    color: var(--artelv-color-heading);
    font-weight: 700;
}

.firmware-version li p {
    margin: 8px 0 0;
    color: var(--artelv-color-muted);
    line-height: 1.62;
}

.firmware-info {
    margin-top: 84px;
    padding: 1px 38px 30px;
    border-radius: calc(var(--artelv-radius-card) * 2);
    background: var(--artelv-color-surface-blue);
}

.firmware-info h2 {
    margin-top: 42px;
}

.firmware-contacts {
    margin-top: 28px;
    padding: 1px 38px 38px;
    border-radius: calc(var(--artelv-radius-card) * 2);
    color: var(--artelv-color-card);
    background: var(--artelv-color-heading);
    box-shadow: var(--artelv-shadow-form);
}

.firmware-contacts h2 {
    margin-top: 42px;
    color: var(--artelv-color-card);
}

.firmware-contacts a {
    color: #a9e1c1;
}

.firmware-contacts a:hover,
.firmware-contacts a:focus-visible {
    color: var(--artelv-color-card);
}

.firmware-contacts li::before {
    background: #a9e1c1;
}

.firmware-progress {
    position: fixed;
    inset: 0 0 auto;
    z-index: 30;
    height: 4px;
    pointer-events: none;
}

.firmware-progress__bar {
    display: block;
    width: 100%;
    height: 100%;
    background: var(--artelv-color-accent);
    transform: scaleX(0);
    transform-origin: left center;
    will-change: transform;
}

.firmware-to-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 20;
    display: grid;
    width: 48px;
    height: 48px;
    place-items: center;
    border: 0;
    border-radius: 50%;
    color: var(--artelv-color-card);
    background: var(--artelv-color-heading);
    box-shadow: var(--artelv-shadow-form);
    cursor: pointer;
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.firmware-to-top:hover,
.firmware-to-top:focus-visible {
    background: var(--artelv-color-accent);
}

.firmware-to-top.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.firmware-enhanced .firmware-reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}

.firmware-enhanced .firmware-reveal.is-visible {
    opacity: 1;
    transform: none;
}

@media (max-width: 720px) {
    .firmware-page,
    .firmware-article {
        font-size: 16px;
        line-height: 1.65;
    }

    .firmware-hero {
        margin-bottom: 54px;
    }

    .firmware-hero h2 {
        font-size: clamp(23px, 5vw, 28px);
        line-height: 1.08;
        letter-spacing: -0.025em;
    }

    .firmware-hero p {
        font-size: 16px;
    }

    .firmware-article h2 {
        margin-bottom: 24px;
        font-size: clamp(21px, 5vw, 26px);
        line-height: 1.16;
        letter-spacing: -0.02em;
    }

    .firmware-article h3 {
        font-size: 17px;
    }

    .firmware-warning {
        margin-bottom: 54px;
        padding: 76px 22px 26px;
    }

    .firmware-warning::before {
        top: 24px;
        left: 22px;
    }

    .firmware-step h3 {
        padding: 22px 18px 24px 64px;
    }

    .firmware-step__number {
        top: 14px;
        left: 18px;
        width: 38px;
        height: 38px;
    }

    .firmware-step > :not(h3):not(.firmware-step__number) {
        margin-right: 20px;
        margin-left: 20px;
    }

    .firmware-step > :last-child {
        margin-bottom: 24px;
    }

    .firmware-process,
    .firmware-versions {
        margin-bottom: 60px;
    }

    .firmware-version {
        padding-right: 16px;
        padding-left: 16px;
    }

    .firmware-version.is-latest {
        padding-left: 20px;
    }

    .firmware-version h2 {
        font-size: 24px;
    }

    .firmware-info,
    .firmware-contacts {
        padding-right: 22px;
        padding-left: 22px;
    }

    .firmware-to-top {
        right: 14px;
        bottom: 14px;
        width: 44px;
        height: 44px;
    }

}

@media (max-width: 360px) {
    .firmware-page,
    .firmware-article {
        font-size: 15px;
        line-height: 1.58;
    }

    .firmware-hero h2 {
        padding-top: 22px;
        font-size: 22px;
        line-height: 1.08;
        letter-spacing: -0.025em;
    }

    .firmware-hero p {
        font-size: 15px;
    }

    .firmware-article h2 {
        margin-bottom: 22px;
        font-size: 20px;
        line-height: 1.14;
        letter-spacing: -0.02em;
    }

    .firmware-article h3 {
        font-size: 16px;
        line-height: 1.3;
    }

    .firmware-warning {
        margin: 32px 0 48px;
        padding: 64px 16px 22px;
    }

    .firmware-warning::before {
        top: 18px;
        left: 16px;
        width: 34px;
        height: 34px;
    }

    .firmware-warning__title {
        font-size: 18px;
    }

    .firmware-step {
        margin-top: 16px;
        border-radius: var(--artelv-radius-card);
    }

    .firmware-step h3 {
        padding: 19px 14px 23px 54px;
    }

    .firmware-step__number {
        top: 13px;
        left: 12px;
        width: 32px;
        height: 32px;
        font-size: 13px;
    }

    .firmware-step > :not(h3):not(.firmware-step__number) {
        margin-right: 14px;
        margin-left: 14px;
    }

    .firmware-step > ol li {
        padding: 10px 10px 10px 38px;
    }

    .firmware-step > ol li::before {
        top: 10px;
        left: 14px;
    }

    .firmware-note {
        margin-top: 24px;
        padding: 14px;
    }

    .firmware-step > .firmware-note {
        margin-top: 24px;
    }

    .firmware-version,
    .firmware-version.is-latest {
        padding-right: 10px;
        padding-left: 14px;
    }

    .firmware-version h2 {
        padding-top: 24px;
        font-size: 19px;
    }

    .firmware-version li {
        padding-left: 20px;
    }

    .firmware-version ul > li::before {
        left: 0;
    }

    .firmware-info,
    .firmware-contacts {
        padding-right: 16px;
        padding-left: 16px;
    }
}

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

    .firmware-enhanced .firmware-reveal,
    .firmware-to-top {
        transition: none;
    }
}