.engine-page {
    --engine-ink: #101217;
    --engine-muted: #69707f;
    --engine-line: #dfe3ea;
    --engine-surface: #f3f5f8;
    --engine-blue: #064acb;
    --engine-yellow: #f4c247;
    --engine-dark: #0d1119;
    color: var(--engine-ink);
    background: #fff;
}

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

.engine-kicker {
    margin: 0 0 10px;
    color: var(--engine-blue);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
}

.engine-hero {
    padding: 34px 0 70px;
    overflow: hidden;
    color: #fff;
    background:
        radial-gradient(circle at 84% 28%, rgba(6, 74, 203, .33), transparent 30%),
        linear-gradient(135deg, #0a0d13 0%, #151b26 65%, #0b111c 100%);
}

.engine-breadcrumbs {
    display: flex;
    gap: 9px;
    align-items: center;
    margin-bottom: 62px;
    color: rgba(255, 255, 255, .55);
    font-size: 13px;
}

.engine-breadcrumbs a {
    color: rgba(255, 255, 255, .78);
    transition: color .18s ease;
}

.engine-breadcrumbs a:hover,
.engine-breadcrumbs a:focus-visible {
    color: var(--engine-yellow);
}

.engine-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(260px, .6fr);
    gap: 70px;
    align-items: end;
}

.engine-hero .engine-kicker {
    color: var(--engine-yellow);
}

.engine-hero h1,
.engine-viewer h2,
.engine-context h2 {
    font-family: "Uni-Sans", "Rubik", Arial, sans-serif;
    font-weight: 700;
    text-transform: uppercase;
}

.engine-hero h1 {
    max-width: 820px;
    margin: 0 0 22px;
    font-size: clamp(46px, 7.5vw, 108px);
    line-height: .88;
    letter-spacing: -.035em;
}

.engine-hero__lead {
    max-width: 680px;
    margin: 0;
    color: rgba(255, 255, 255, .72);
    font-size: clamp(16px, 1.5vw, 21px);
    line-height: 1.58;
}

.engine-hero__facts {
    display: flex;
    gap: 36px;
    margin: 38px 0 0;
}

.engine-hero__facts li {
    display: flex;
    gap: 10px;
    align-items: baseline;
    color: rgba(255, 255, 255, .6);
    font-size: 12px;
    letter-spacing: .03em;
    text-transform: uppercase;
}

.engine-hero__facts span {
    color: #fff;
    font-family: "Uni-Sans", "Rubik", Arial, sans-serif;
    font-size: 25px;
}

.engine-hero__note {
    position: relative;
    max-width: 370px;
    padding: 25px 0 0 30px;
    border-top: 1px solid rgba(255, 255, 255, .25);
    color: rgba(255, 255, 255, .7);
    font-size: 14px;
    line-height: 1.65;
}

.engine-hero__note::before {
    content: "";
    position: absolute;
    top: 27px;
    left: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--engine-yellow);
    box-shadow: 0 0 0 7px rgba(244, 194, 71, .12);
}

.engine-hero__note-index {
    position: absolute;
    top: -30px;
    right: 0;
    color: rgba(255, 255, 255, .16);
    font-family: "Uni-Sans", "Rubik", Arial, sans-serif;
    font-size: 78px;
    line-height: 1;
}

.engine-lab {
    padding: 80px 0 92px;
    background: var(--engine-surface);
}

.engine-viewer {
    overflow: hidden;
    border: 1px solid #d8dde6;
    border-radius: 22px;
    background: #fff;
    box-shadow: 0 24px 70px rgba(26, 34, 49, .09);
}

.engine-viewer__header {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    align-items: end;
    padding: 30px 34px 24px;
    border-bottom: 1px solid var(--engine-line);
}

.engine-viewer h2 {
    margin: 0;
    font-size: clamp(27px, 3vw, 40px);
    line-height: 1;
}

.engine-viewer__hint {
    max-width: 420px;
    margin: 0;
    color: var(--engine-muted);
    font-size: 13px;
    line-height: 1.55;
}

.engine-viewer__modes {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    overflow-x: auto;
    border-bottom: 1px solid var(--engine-line);
    scrollbar-width: thin;
}

.engine-viewer__modes button,
.engine-viewer__hotspots button,
.engine-control {
    border: 0;
    font: inherit;
}

.engine-viewer__modes button {
    flex: 0 0 auto;
    min-height: 40px;
    padding: 9px 16px;
    border: 1px solid transparent;
    border-radius: 999px;
    color: #535c6c;
    background: transparent;
    font-size: 13px;
    font-weight: 600;
    transition: .18s ease;
}

.engine-viewer__modes button:hover {
    color: var(--engine-blue);
    background: #f2f6ff;
}

.engine-viewer__modes button[aria-pressed="true"] {
    color: #fff;
    background: var(--engine-blue);
    box-shadow: 0 5px 18px rgba(6, 74, 203, .23);
}

.engine-viewer__workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 345px;
    min-height: 680px;
}

.engine-viewer__stage {
    position: relative;
    background: var(--engine-surface);
    border-top: 1px solid var(--engine-line);
    border-bottom: 1px solid var(--engine-line);
    overflow: hidden;
}

.engine-viewer__stage::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(to right, rgba(16, 18, 23, .05) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(16, 18, 23, .05) 1px, transparent 1px);
    background-size: 58px 58px;
    pointer-events: none;
}

.engine-viewer__canvas {
    position: absolute;
    z-index: 1;
    inset: 0;
    min-height: 520px;
    cursor: grab;
    outline: none;
    touch-action: pan-y;
}

.engine-viewer__canvas:active {
    cursor: grabbing;
}

.engine-viewer__canvas:focus-visible {
    box-shadow: inset 0 0 0 3px var(--engine-yellow);
}

.engine-viewer__canvas canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.engine-viewer__loading,
.engine-viewer__fallback {
    position: absolute;
    z-index: 5;
    inset: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
    align-items: center;
    justify-content: center;
    padding: 36px;
    color: #fff;
    text-align: center;
    background:
        linear-gradient(rgba(7, 11, 18, .68), rgba(7, 11, 18, .9)),
        url("../images/engine-poster.webp") center / cover no-repeat,
        #0e141e;
}

.engine-viewer__loading.is-hidden {
    opacity: 0;
    visibility: hidden;
    transition: opacity .35s ease, visibility .35s ease;
}

.engine-viewer__fallback[hidden] {
    display: none;
}

.engine-viewer__fallback h3 {
    margin: 0;
    font-family: "Uni-Sans", "Rubik", Arial, sans-serif;
    font-size: 31px;
    text-transform: uppercase;
}

.engine-viewer__fallback p {
    max-width: 520px;
    margin: 0;
    color: rgba(255, 255, 255, .68);
    line-height: 1.6;
}

.engine-viewer__spinner {
    width: 42px;
    height: 42px;
    border: 2px solid rgba(255, 255, 255, .15);
    border-top-color: var(--engine-yellow);
    border-radius: 50%;
    animation: engine-spin .8s linear infinite;
}

@keyframes engine-spin {
    to { transform: rotate(360deg); }
}

.engine-viewer__status,
.engine-viewer__legend,
.engine-viewer__controls {
    position: absolute;
    z-index: 3;
}

.engine-viewer__status {
    top: 18px;
    left: 20px;
    display: flex;
    gap: 9px;
    align-items: center;
    padding: 9px 13px;
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 999px;
    color: rgba(255, 255, 255, .78);
    background: rgba(8, 12, 19, .64);
    font-size: 12px;
    backdrop-filter: blur(12px);
}

.engine-viewer__live-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #6fd69b;
    box-shadow: 0 0 0 5px rgba(111, 214, 155, .12);
}

.engine-viewer__legend {
    top: 18px;
    right: 20px;
    display: flex;
    gap: 13px;
    padding: 9px 13px;
    border: 1px solid var(--engine-line);
    border-radius: 8px;
    color: var(--engine-ink);
    background: rgba(255, 255, 255, .92);
    font-size: 11px;
    backdrop-filter: blur(12px);
}

.engine-viewer__legend[hidden] {
    display: none;
}

.engine-viewer__legend span {
    display: flex;
    gap: 6px;
    align-items: center;
}

.engine-color {
    display: block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
}

.engine-color--oil { background: #ffd23f; }
.engine-color--intake { background: #45c8ff; }
.engine-color--exhaust { background: #ff764d; }

.engine-viewer__controls {
    right: 20px;
    bottom: 20px;
    left: 20px;
    display: flex;
    gap: 10px;
    align-items: center;
    padding: 10px;
    border: 1px solid var(--engine-line);
    border-radius: 13px;
    color: var(--engine-ink);
    background: rgba(255, 255, 255, .94);
    box-shadow: 0 10px 36px rgba(0, 0, 0, .28);
    backdrop-filter: blur(14px);
}

.engine-control {
    min-height: 42px;
    padding: 10px 15px;
    border: 1px solid var(--engine-line);
    border-radius: 8px;
    color: var(--engine-ink);
    background: #fff;
    font-size: 12px;
    font-weight: 600;
    transition: .18s ease;
}

.engine-control:hover,
.engine-control:focus-visible {
    color: var(--engine-blue);
    background: #f2f6ff;
}

.engine-control--play {
    display: flex;
    gap: 8px;
    align-items: center;
    color: #101217;
    background: var(--engine-yellow);
}

.engine-control--play:hover,
.engine-control--play:focus-visible {
    color: #101217;
    background: #ffd35f;
}

.engine-speed {
    display: flex;
    gap: 9px;
    align-items: center;
    margin-right: auto;
    color: var(--engine-muted);
    font-size: 11px;
    text-transform: uppercase;
}

.engine-speed select {
    min-height: 42px;
    padding: 0 31px 0 12px;
    border: 1px solid var(--engine-line);
    border-radius: 8px;
    color: var(--engine-ink);
    background: #fff;
    font: inherit;
}

.engine-viewer__panel {
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: #fff;
}

.engine-viewer__panel-head {
    display: flex;
    justify-content: space-between;
    padding: 19px 21px;
    border-bottom: 1px solid var(--engine-line);
    color: var(--engine-muted);
    font-size: 11px;
    letter-spacing: .09em;
    text-transform: uppercase;
}

.engine-viewer__panel-head strong {
    color: var(--engine-blue);
}

.engine-viewer__hotspots {
    display: flex;
    flex-direction: column;
    max-height: 307px;
    overflow-y: auto;
    border-bottom: 1px solid var(--engine-line);
}

.engine-viewer__hotspots button {
    position: relative;
    display: grid;
    grid-template-columns: 32px 1fr;
    gap: 11px;
    align-items: center;
    min-height: 58px;
    padding: 11px 18px;
    color: #4d5664;
    background: #fff;
    text-align: left;
    font-size: 12px;
    line-height: 1.3;
    transition: .18s ease;
}

.engine-viewer__hotspots button:not(:last-child) {
    border-bottom: 1px solid #edf0f4;
}

.engine-viewer__hotspots button:hover {
    color: var(--engine-blue);
    background: #f7f9fd;
}

.engine-viewer__hotspots button[aria-current="true"] {
    color: var(--engine-ink);
    background: #f1f5fd;
    font-weight: 600;
}

.engine-viewer__hotspots button[aria-current="true"]::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 3px;
    background: var(--engine-blue);
}

.engine-viewer__hotspots b {
    display: grid;
    width: 28px;
    height: 28px;
    place-items: center;
    border: 1px solid #d9dfeb;
    border-radius: 50%;
    color: var(--engine-blue);
    font-size: 9px;
}

.engine-detail {
    display: flex;
    flex: 1;
    flex-direction: column;
    padding: 25px 24px 22px;
}

.engine-detail__eyebrow {
    margin: 0 0 9px;
    color: var(--engine-blue);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
}

.engine-detail h3 {
    margin: 0 0 14px;
    font-family: "Uni-Sans", "Rubik", Arial, sans-serif;
    font-size: 25px;
    line-height: 1.05;
    text-transform: uppercase;
}

.engine-detail > p:not(.engine-detail__eyebrow):not(.engine-detail__product) {
    margin: 0 0 14px;
    color: #535c69;
    font-size: 13px;
    line-height: 1.55;
}

.engine-detail__product {
    margin: 0 0 22px;
    padding: 12px 13px;
    border-left: 3px solid var(--engine-yellow);
    color: #333a46;
    background: #f8f5ea;
    font-size: 12px;
    line-height: 1.5;
}

.engine-detail__link {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
    margin-top: auto;
    padding-top: 15px;
    border-top: 1px solid var(--engine-line);
    color: var(--engine-blue);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .03em;
    text-transform: uppercase;
}

.engine-viewer__disclaimer {
    margin: 0;
    padding: 14px 25px;
    border-top: 1px solid var(--engine-line);
    color: #737b88;
    background: #fafbfc;
    font-size: 11px;
    line-height: 1.5;
}

.engine-viewer__disclaimer[hidden] {
    display: none;
}

.engine-context {
    padding: 90px 0;
}

.engine-context__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 100px;
}

.engine-context h2 {
    max-width: 690px;
    margin: 0;
    font-size: clamp(29px, 4vw, 52px);
    line-height: 1.05;
}

.engine-context__copy {
    padding-top: 25px;
}

.engine-context__copy p {
    margin: 0 0 18px;
    color: #596170;
    font-size: 15px;
    line-height: 1.7;
}

.engine-context__links {
    display: flex;
    gap: 11px;
    margin-top: 31px;
}

.engine-noscript {
    padding: 40px 0;
    text-align: center;
    background: #f4f5f7;
}

@media (max-width: 1100px) {
    .engine-viewer__workspace {
        grid-template-columns: minmax(0, 1fr) 310px;
    }

    .engine-hero__grid {
        gap: 40px;
    }

    .engine-hero__facts {
        flex-wrap: wrap;
        gap: 18px 28px;
    }
}

@media (max-width: 900px) {
    .engine-hero {
        padding-bottom: 54px;
    }

    .engine-breadcrumbs {
        margin-bottom: 43px;
    }

    .engine-hero__grid,
    .engine-context__grid {
        grid-template-columns: 1fr;
    }

    .engine-hero__note {
        max-width: 560px;
    }

    .engine-viewer__workspace {
        grid-template-columns: 1fr;
    }

    .engine-viewer__stage {
        min-height: 610px;
    }

    .engine-viewer__panel {
        display: grid;
        grid-template-columns: minmax(230px, .8fr) minmax(0, 1.2fr);
    }

    .engine-viewer__panel-head {
        grid-column: 1 / -1;
    }

    .engine-viewer__hotspots {
        max-height: 355px;
        border-right: 1px solid var(--engine-line);
        border-bottom: 0;
    }

    .engine-detail {
        min-height: 355px;
    }

    .engine-context__grid {
        gap: 28px;
    }

    .engine-context__copy {
        padding-top: 0;
    }
}

@media (max-width: 640px) {
    .engine-hero {
        padding-top: 22px;
    }

    .engine-breadcrumbs {
        margin-bottom: 35px;
        overflow-x: auto;
        white-space: nowrap;
    }

    .engine-hero h1 {
        font-size: clamp(43px, 15vw, 68px);
    }

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

    .engine-lab,
    .engine-context {
        padding: 54px 0;
    }

    .engine-viewer {
        margin: 0 -10px;
        border-radius: 14px;
    }

    .engine-viewer__header {
        display: block;
        padding: 24px 20px 19px;
    }

    .engine-viewer__hint {
        margin-top: 12px;
    }

    .engine-viewer__modes {
        padding: 10px;
    }

    .engine-viewer__stage {
        min-height: 540px;
    }

    .engine-viewer__canvas {
        min-height: 540px;
    }

    .engine-viewer__status {
        top: 12px;
        left: 12px;
    }

    .engine-viewer__legend {
        top: 56px;
        right: 12px;
        left: 12px;
        justify-content: center;
    }

    .engine-viewer__controls {
        right: 12px;
        bottom: 12px;
        left: 12px;
        flex-wrap: wrap;
    }

    .engine-speed {
        order: 3;
        width: 100%;
    }

    .engine-speed select {
        flex: 1;
    }

    .engine-viewer__panel {
        display: block;
    }

    .engine-viewer__hotspots {
        display: grid;
        grid-template-columns: repeat(7, minmax(142px, 1fr));
        max-height: none;
        overflow-x: auto;
        border-right: 0;
        border-bottom: 1px solid var(--engine-line);
    }

    .engine-viewer__hotspots button {
        min-height: 74px;
        border-right: 1px solid #edf0f4;
        border-bottom: 0 !important;
    }

    .engine-detail {
        min-height: 330px;
        padding: 24px 20px;
    }

    .engine-context__links {
        flex-direction: column;
    }
}

@media (prefers-reduced-motion: reduce) {
    .engine-page *,
    .engine-page *::before,
    .engine-page *::after {
        scroll-behavior: auto !important;
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
    }
}

.engine-viewer__labels {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.engine-label {
    position: absolute;
    padding: 4px 9px;
    border-radius: 6px;
    border: 1px solid var(--engine-line);
    background: rgba(255, 255, 255, .92);
    color: var(--engine-ink);
    font-size: 12px;
    line-height: 1.25;
    font-weight: 600;
    white-space: nowrap;
    transform: translate(-50%, -50%);
    box-shadow: 0 1px 3px rgba(16, 18, 23, .12);
}

.engine-label--node {
    cursor: pointer;
}

.engine-label--node:hover,
.engine-label--node:focus-visible {
    border-color: var(--engine-blue);
    color: var(--engine-blue);
    outline: none;
}

.engine-label--stroke {
    border-color: transparent;
    background: var(--engine-blue);
    color: #fff;
    font-size: 11px;
    letter-spacing: .02em;
    text-transform: uppercase;
}

.engine-before-after {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--engine-muted);
    text-transform: uppercase;
    letter-spacing: .04em;
}

.engine-control--toggle[aria-pressed='true'] {
    background: var(--engine-blue);
    color: #fff;
}

@media (max-width: 767px) {
    .engine-label {
        font-size: 11px;
        padding: 3px 7px;
    }

    .engine-label--stroke {
        font-size: 10px;
    }
}