:root {
    --blueprint-blue: #1a4d8f;
    --white-10: rgba(255, 255, 255, 0.16);
    --white-08: rgba(255, 255, 255, 0.14);
    --white-06: rgba(255, 255, 255, 0.1);
    --white-80: rgba(255, 255, 255, 0.9);
    --white-92: rgba(255, 255, 255, 0.98);
    --white-55: rgba(255, 255, 255, 0.74);
    --header-strip-height: clamp(58px, 5.5vw, 72px);
    --entry-main-height: clamp(340px, 54vh, 560px);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    width: 100%;
    min-height: 100%;
    background: var(--blueprint-blue);
    color: var(--white-92);
    font-family: "Space Mono", "Courier New", monospace;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

a {
    color: inherit;
    text-decoration: none;
}

.serif {
    font-family: "Playfair Display", Georgia, serif;
}

.mono {
    font-family: "Space Mono", "Courier New", monospace;
}

.blueprint-grid {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-color: var(--blueprint-blue);
    background-image:
        linear-gradient(to right, var(--white-10) 1px, transparent 1px),
        linear-gradient(to bottom, var(--white-10) 1px, transparent 1px);
    background-size: 40px 40px;
}

.blueprint-noise {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background-image: radial-gradient(rgba(255, 255, 255, 0.06) 0.45px, transparent 0.45px);
    background-size: 3px 3px;
    opacity: 0.1;
}

.lux-glow {
    position: fixed;
    left: 0;
    top: 0;
    width: 760px;
    height: 760px;
    transform: translate(0, 0);
    z-index: 2;
    pointer-events: none;
    border-radius: 999px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.05) 34%, rgba(255, 255, 255, 0) 70%);
    filter: blur(22px);
    opacity: 0.3;
}

.scroll-progress {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    z-index: 40;
    height: 2px;
    background: rgba(255, 255, 255, 0.12);
}

.scroll-progress span {
    display: block;
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.65), rgba(255, 255, 255, 0.95));
}

.ui-float {
    border: 1px solid var(--white-10);
    background: linear-gradient(180deg, var(--white-08), var(--white-06));
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    box-shadow: 0 18px 50px -38px rgba(0, 7, 24, 0.72), inset 0 1px 0 rgba(255, 255, 255, 0.22);
    position: relative;
}

.ui-float::before {
    content: "";
    position: absolute;
    inset: 0;
    border: 1px solid transparent;
    border-image: linear-gradient(135deg, rgba(255, 255, 255, 0.42), rgba(255, 255, 255, 0.05)) 1;
    pointer-events: none;
}

.header-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: auto;
    max-width: none;
    margin: 0;
    z-index: 30;
    min-height: var(--header-strip-height);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 1rem;
    padding: 0.58rem 1rem;
}

.header-left {
    justify-self: start;
}

.header-left .marker {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--white-80);
    font-size: 0.66rem;
    letter-spacing: 0.14em;
}

.header-left h1 {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.header-center {
    display: flex;
    justify-self: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 0.74rem;
    flex-wrap: nowrap;
    white-space: nowrap;
}

.header-center a {
    color: var(--white-80);
}

.header-center a:hover {
    color: #ffffff;
}

.header-right {
    display: flex;
    justify-self: end;
    justify-content: flex-end;
    gap: 0.8rem;
    font-size: 0.73rem;
    color: var(--white-80);
}

.landing {
    position: relative;
    z-index: 2;
    padding: var(--header-strip-height) 0 96px;
}

.container {
    width: min(1240px, calc(100vw - 48px));
    margin: 0 auto;
}

.container-full {
    width: calc(100vw - 48px);
    margin: 0 auto;
}

.header-intro {
    position: relative;
    width: 100%;
    margin: 0 0 clamp(18px, 3vw, 34px);
    border-top: 1px solid rgba(8, 8, 8, 0.58);
    border-bottom: 1px solid rgba(8, 8, 8, 0.58);
    background: #f2f2f2;
    color: #050505;
    overflow: hidden;
}

.header-intro::before {
    content: "";
    position: absolute;
    left: 50%;
    top: -30%;
    width: 2px;
    height: 160%;
    background: rgba(5, 5, 5, 0.82);
    transform: rotate(-32deg);
    transform-origin: center;
    pointer-events: none;
}

.header-intro-inner {
    position: relative;
    z-index: 1;
    width: calc(100vw - 48px);
    max-width: none;
    min-height: clamp(280px, 42vh, 500px);
    margin: 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(150px, 260px);
    align-items: center;
    gap: clamp(1rem, 3vw, 2.8rem);
    padding: clamp(2.6rem, 6vw, 5rem) 0;
}

.header-intro-logo-wrap {
    width: min(100%, 380px);
    aspect-ratio: 1 / 1;
    border: 1px solid rgba(8, 8, 8, 0.58);
    background: #f6f6f6;
    display: grid;
    place-items: center;
    grid-column: 2;
    grid-row: 1;
    justify-self: start;
    transform: translateX(-7rem);
}

.has-anim .header-intro-logo-wrap {
    opacity: 0;
    transform: translateX(-7rem) translateY(2rem) scale(0.92);
    transition: opacity 0.9s ease, transform 0.9s ease;
}

.has-anim .header-intro-logo-wrap.is-logo-visible {
    opacity: 1;
    transform: translateX(-7rem);
}

.header-intro-logo {
    width: 90%;
    height: auto;
    object-fit: contain;
    filter: grayscale(1) contrast(1.1) brightness(0.85);
}

.header-intro-copy {
    display: grid;
    align-content: center;
    justify-items: start;
    text-align: left;
    gap: 0.7rem;
    grid-column: 1;
    grid-row: 1;
}

.header-intro-kicker {
    margin: 0;
    color: rgba(8, 8, 8, 0.68);
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    padding-left: 0.9rem;
}

.header-intro-title {
    margin: 0;
    color: #050505;
    font-size: 7.6rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    line-height: 0.9;
}

.header-intro-title.typewriter-text::after {
    color: rgba(5, 5, 5, 0.86);
}

.header-intro .typewriter-text::after {
    color: rgba(5, 5, 5, 0.86);
}

.header-intro-line {
    display: block;
    width: min(560px, 100%);
    height: 2px;
    background: #050505;
}

.entry-gateway {
    position: relative;
    z-index: 12;
    width: 100vw;
    max-width: 100vw;
    margin: 0 0 clamp(10px, 2vw, 20px) calc(50% - 50vw);
    border: 1px solid rgba(8, 8, 8, 0.58);
    background: #f2f2f2;
    color: #0b0b0b;
    overflow: hidden;
}

.entry-gateway-head {
    min-height: var(--header-strip-height);
    display: flex;
    align-items: center;
    padding: 0 clamp(1rem, 2vw, 1.7rem);
    border-bottom: 1px solid rgba(8, 8, 8, 0.52);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
}

.entry-gateway-main {
    position: relative;
    min-height: var(--entry-main-height);
    display: grid;
    grid-template-columns: minmax(250px, 430px) 1fr;
    align-items: center;
    gap: clamp(1.4rem, 4vw, 6rem);
    padding: clamp(1.2rem, 3vw, 2.6rem) clamp(1rem, 3vw, 2.4rem) clamp(2rem, 4vw, 3.1rem);
    border-bottom: 1px solid rgba(8, 8, 8, 0.52);
}

.entry-logo-wrap {
    width: min(100%, 390px);
    aspect-ratio: 1 / 1;
    border: 1px solid rgba(8, 8, 8, 0.58);
    background: #f6f6f6;
    display: grid;
    place-items: center;
}

.entry-logo {
    width: 76%;
    height: auto;
    object-fit: contain;
    filter: grayscale(1) contrast(1.3) brightness(0.18);
}

.entry-wordmark {
    position: relative;
    z-index: 2;
}

.entry-brand-sub {
    margin: 0 0 0.7rem;
    color: rgba(11, 11, 11, 0.74);
    font-size: 0.8rem;
    letter-spacing: 0.24em;
}

.entry-brand-title {
    margin: 0;
    font-size: clamp(2.4rem, 8vw, 8.2rem);
    line-height: 0.9;
    letter-spacing: 0.12em;
    color: #050505;
}

.entry-brand-line {
    display: block;
    width: min(640px, 92%);
    height: 2px;
    background: #050505;
    margin-top: clamp(0.9rem, 2vw, 1.6rem);
}

.entry-diagonal {
    position: absolute;
    left: clamp(280px, 36vw, 670px);
    top: 0;
    width: 1px;
    height: 190%;
    background: rgba(8, 8, 8, 0.6);
    transform: rotate(-31deg);
    transform-origin: top left;
    pointer-events: none;
}

.hero {
    min-height: auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
    align-items: start;
}

.hero-copy {
    padding: 0 clamp(0.2rem, 2vw, 1rem);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 1.05rem;
    max-width: none;
    width: 100%;
}

.kicker {
    margin: 0;
    color: var(--white-80);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
}

.hero-copy h2 {
    margin: 0;
    font-size: clamp(2rem, 4vw, 4.5rem);
    line-height: 1.02;
    letter-spacing: -0.015em;
    text-wrap: balance;
}

.hero-brand {
    margin: 0;
    font-size: clamp(3.4rem, 15vw, 10.5rem);
    line-height: 0.86;
    letter-spacing: 0.08em;
    font-family: "Space Mono", "Courier New", monospace;
    font-weight: 700;
    font-style: normal;
    color: #ffffff;
    text-shadow:
        0 0 24px rgba(255, 255, 255, 0.34),
        0 0 66px rgba(255, 255, 255, 0.15);
    display: grid;
    gap: 0.35rem;
}

.hero-brand-line {
    display: block;
    min-height: 0.9em;
}

.hero-brand-line--sub {
    font-size: clamp(0.78rem, 2.3vw, 1.42rem);
    letter-spacing: 0.22em;
    color: var(--white-80);
    text-shadow: 0 0 18px rgba(255, 255, 255, 0.12);
    min-height: 1.1em;
}

.typewriter-text {
    display: inline-flex;
    align-items: baseline;
    min-height: 0.95em;
    font-family: inherit;
    font-weight: inherit;
    font-style: inherit;
}

.typewriter-text::after {
    content: "";
    margin-left: 0.08em;
    color: rgba(255, 255, 255, 0.86);
    font-size: 1em;
    line-height: 1;
    opacity: 0;
}

.typewriter-text--small::after {
    font-size: 0.76em;
    margin-left: 0.12em;
}

.typewriter-text.is-caret-active::after {
    content: "|";
    animation: typewriter-caret 0.8s steps(1, end) infinite;
    opacity: 1;
}

.typewriter-text.is-caret-fixed::after {
    content: "|";
    animation: none;
    opacity: 1;
}

.typewriter-text.is-caret-hidden::after {
    content: "";
    animation: none;
    opacity: 0;
}

@keyframes typewriter-caret {
    0%, 49% {
        opacity: 1;
    }
    50%, 100% {
        opacity: 0;
    }
}

.hero-copy p {
    margin: 0;
    color: var(--white-80);
    font-size: 0.9rem;
    line-height: 1.9;
    max-width: none;
}

.hero-after-type {
    opacity: 1;
    transform: translateY(0);
    transition: none;
}

body.has-anim .hero-after-type {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 560ms ease, transform 560ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

body.has-anim .hero-after-type.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    padding-top: 0.4rem;
}

.cylinder-showcase {
    overflow: hidden;
}

.cylinder-showcase-head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 1rem;
    align-items: end;
    padding: 1rem 1rem 0.95rem;
    border-bottom: 1px solid var(--white-10);
}

.cylinder-showcase-copy {
    display: grid;
    gap: 0.38rem;
}

.cylinder-showcase-kicker {
    margin: 0;
    color: var(--white-55);
    font-size: 0.64rem;
    letter-spacing: 0.16em;
}

.cylinder-showcase-title {
    margin: 0;
    font-size: clamp(1.5rem, 2.7vw, 2.5rem);
    line-height: 1;
}

.cylinder-model-switcher {
    display: flex;
    gap: 0.7rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.model-button {
    border: 1px solid rgba(168, 216, 255, 0.55);
    border-radius: 999px;
    background: rgba(8, 28, 54, 0.9);
    color: #d9efff;
    padding: 0.72rem 1rem;
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    cursor: pointer;
    transition: background-color 140ms ease, border-color 140ms ease, transform 140ms ease, box-shadow 140ms ease;
}

.model-button:hover {
    background: rgba(20, 63, 121, 0.88);
    border-color: rgba(168, 216, 255, 0.9);
    transform: translateY(-1px);
}

.model-button.is-active {
    background: linear-gradient(135deg, rgba(44, 122, 255, 0.95), rgba(18, 63, 121, 0.95));
    border-color: rgba(214, 239, 255, 0.96);
    box-shadow: 0 0 18px rgba(47, 140, 255, 0.28);
}

.model-button:focus-visible {
    outline: 2px solid rgba(214, 239, 255, 0.96);
    outline-offset: 2px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--white-10);
    padding: 0.68rem 0.9rem;
    font-size: 0.72rem;
    letter-spacing: 0.05em;
    background: rgba(255, 255, 255, 0.03);
    transition: transform 240ms cubic-bezier(0.2, 0.8, 0.2, 1), background 220ms ease, border-color 220ms ease;
}

.btn:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

.btn-primary {
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.12);
}

.hero-signature {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.5rem;
    margin-top: 0.25rem;
}

.hero-signature span {
    border-top: 1px solid var(--white-10);
    padding-top: 0.45rem;
    font-size: 0.6rem;
    letter-spacing: 0.12em;
    color: var(--white-55);
}

.hero-signature strong {
    display: block;
    color: #ffffff;
    font-size: 0.74rem;
    margin-bottom: 0.25rem;
}

.stage-toolbar {
    padding: 0.95rem 1rem 1rem;
}

.stage-toolbar-kicker {
    margin: 0 0 0.65rem;
    color: var(--white-55);
    font-size: 0.64rem;
    letter-spacing: 0.16em;
}

.tank-model-switcher {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.7rem;
}

.tank-model-chip {
    appearance: none;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.04));
    color: var(--white-92);
    padding: 0.9rem 0.95rem;
    text-align: left;
    cursor: pointer;
    transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1), border-color 220ms ease, background 220ms ease, box-shadow 220ms ease;
}

.tank-model-chip:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.24);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.05));
}

.tank-model-chip.is-active {
    border-color: rgba(255, 255, 255, 0.42);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.07));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16), 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.tank-model-chip-title,
.tank-model-chip-subtitle {
    display: block;
}

.tank-model-chip-title {
    font-size: 0.76rem;
    letter-spacing: 0.04em;
    color: #ffffff;
}

.tank-model-chip-subtitle {
    margin-top: 0.38rem;
    font-size: 0.62rem;
    letter-spacing: 0.08em;
    color: var(--white-55);
}

.stage {
    position: relative;
    min-height: 760px;
    height: min(92vh, 1160px);
    overflow: hidden;
    touch-action: none;
    border-top: 1px solid var(--white-10);
    border-bottom: 1px solid var(--white-10);
}

.cylinder-stage {
    min-height: 620px;
    height: min(84vh, 960px);
    border-top: 0;
}

.product-marquee {
    overflow: hidden;
    padding: 0;
    margin-top: -7.5rem;
}

.product-marquee-mask {
    position: relative;
    overflow: hidden;
    padding: 1rem 0;
}

.product-marquee-mask::before,
.product-marquee-mask::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: clamp(36px, 7vw, 104px);
    z-index: 2;
    pointer-events: none;
}

.product-marquee-mask::before {
    left: 0;
    background: linear-gradient(90deg, rgba(26, 77, 143, 0.96), rgba(26, 77, 143, 0));
}

.product-marquee-mask::after {
    right: 0;
    background: linear-gradient(270deg, rgba(26, 77, 143, 0.96), rgba(26, 77, 143, 0));
}

.product-marquee-track {
    display: flex;
    width: max-content;
    animation: product-marquee-scroll 34s linear infinite;
}

.product-marquee-group {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex-shrink: 0;
    padding-inline: 0.8rem;
}

.product-marquee-item {
    display: inline-flex;
    align-items: center;
    min-height: 48px;
    padding: 0.8rem 1.15rem;
    border-left: 1px solid rgba(255, 255, 255, 0.18);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.05));
    color: var(--white-92);
    font-size: 0.72rem;
    letter-spacing: 0.05em;
    white-space: nowrap;
    text-transform: uppercase;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

@keyframes product-marquee-scroll {
    from {
        transform: translateX(0);
    }
    to {
        transform: translateX(-50%);
    }
}

.photo-strip {
    position: relative;
    width: 100vw;
    max-width: 100vw;
    margin-left: calc(50% - 50vw);
    --photo-strip-content-width: min(1240px, calc(100vw - 48px));
    border: 1px solid rgba(5, 5, 5, 0.22);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(243, 243, 239, 0.98)),
        #f7f7f2;
    color: #0b0b0b;
    box-shadow: 0 26px 60px -42px rgba(0, 10, 28, 0.58);
    overflow: hidden;
}

.photo-strip-head {
    position: absolute;
    inset: 0;
    z-index: 3;
    pointer-events: none;
}

.photo-strip-kicker {
    margin: 0;
    font-size: 0.68rem;
    letter-spacing: 0.16em;
    color: rgba(11, 11, 11, 0.62);
}

.photo-strip-controls {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.photo-strip-button {
    position: absolute;
    top: 50%;
    border: 1px solid rgba(5, 5, 5, 0.22);
    background: #ffffff;
    color: #0b0b0b;
    min-width: 58px;
    padding: 0.68rem 0.8rem;
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    cursor: pointer;
    pointer-events: auto;
    transform: translateY(-50%);
    transition: background-color 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.photo-strip-button:hover {
    background: #eef2f6;
    border-color: rgba(5, 5, 5, 0.42);
    box-shadow: 0 14px 28px -22px rgba(0, 10, 28, 0.55);
}

.photo-strip-button:focus-visible {
    outline: 2px solid rgba(5, 5, 5, 0.8);
    outline-offset: 2px;
}

.photo-strip-button[data-photo-slider-prev] {
    left: max(18px, calc((100vw - var(--photo-strip-content-width)) / 4));
    transform: translate(-50%, -50%);
}

.photo-strip-button[data-photo-slider-next] {
    right: max(18px, calc((100vw - var(--photo-strip-content-width)) / 4));
    transform: translate(50%, -50%);
}

.photo-strip-viewport {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(250px, 31%);
    gap: 1rem;
    width: var(--photo-strip-content-width);
    margin: 0 auto;
    padding: 1rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
}

.photo-strip-viewport::-webkit-scrollbar {
    display: none;
}

.photo-strip-card {
    margin: 0;
    display: grid;
    gap: 0.72rem;
    align-content: start;
    scroll-snap-align: start;
}

.photo-strip-image-box {
    display: grid;
    place-items: center;
    min-height: clamp(178px, 15vw, 240px);
    padding: 1rem;
    width: 100%;
    border: 1px solid rgba(5, 5, 5, 0.16);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(240, 240, 235, 0.98)),
        #ffffff;
    appearance: none;
    cursor: zoom-in;
    transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.photo-strip-image-box:hover {
    border-color: rgba(5, 5, 5, 0.32);
    box-shadow: 0 18px 34px -28px rgba(0, 10, 28, 0.4);
    transform: translateY(-1px);
}

.photo-strip-image-box:focus-visible {
    outline: 2px solid rgba(5, 5, 5, 0.82);
    outline-offset: 2px;
}

.photo-strip-image-box img {
    width: 100%;
    height: 100%;
    max-height: 220px;
    object-fit: contain;
    display: block;
}

.photo-strip-caption {
    margin: 0;
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(11, 11, 11, 0.72);
}

.photo-lightbox[hidden] {
    display: none;
}

.photo-lightbox {
    position: fixed;
    inset: 0;
    z-index: 120;
    display: grid;
    place-items: center;
    padding: 2rem;
}

.photo-lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(4, 10, 19, 0.78);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.photo-lightbox-dialog {
    position: relative;
    z-index: 1;
    width: min(1200px, calc(100vw - 56px));
    padding: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 40px 90px -45px rgba(0, 0, 0, 0.75);
}

.photo-lightbox-close {
    position: absolute;
    top: 0.8rem;
    right: 0.8rem;
    border: 1px solid rgba(5, 5, 5, 0.2);
    background: #ffffff;
    color: #0b0b0b;
    padding: 0.55rem 0.7rem;
    cursor: pointer;
}

.photo-lightbox-figure {
    margin: 0;
    display: grid;
    gap: 0.9rem;
}

.photo-lightbox-image {
    width: 100%;
    max-height: min(78vh, 920px);
    object-fit: contain;
    display: block;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(240, 240, 235, 0.98));
}

.photo-lightbox-caption {
    margin: 0;
    color: rgba(11, 11, 11, 0.74);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.stage canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: inherit;
}

.part-tooltip {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 20;
    pointer-events: none;
    padding: 0.55rem 0.8rem;
    border: 1px solid rgba(126, 223, 255, 0.72);
    border-radius: 999px;
    background: rgba(6, 25, 49, 0.92);
    color: rgba(255, 255, 255, 0.94);
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    box-shadow: 0 0 18px rgba(47, 140, 255, 0.18);
    opacity: 0;
    transform: translate3d(0, 0, 0) scale(0.96);
    transition: opacity 120ms ease, transform 120ms ease;
}

.part-tooltip.is-visible {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale(1);
}

.labels-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.part-label {
    position: absolute;
    transform: translate(-50%, -50%);
    border: 1px solid rgba(255, 255, 255, 0.24);
    background: rgba(255, 255, 255, 0.06);
    color: var(--white-92);
    font-size: 0.62rem;
    letter-spacing: 0.07em;
    padding: 0.12rem 0.34rem;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 220ms ease;
}

.part-info {
    position: absolute;
    left: 18px;
    top: 18px;
    width: min(320px, calc(100% - 36px));
    padding: 0.8rem 0.9rem;
    z-index: 4;
    pointer-events: none;
    background: linear-gradient(180deg, rgba(15, 46, 89, 0.82), rgba(12, 39, 76, 0.86));
    border-left: 2px solid rgba(126, 223, 255, 0.4);
}

.part-info-kicker {
    margin: 0 0 0.38rem;
    font-size: 0.62rem;
    letter-spacing: 0.16em;
    color: var(--white-55);
}

.part-info h4 {
    margin: 0;
    font-size: 0.9rem;
    letter-spacing: 0.04em;
    color: #ffffff;
}

.part-info p {
    margin: 0.45rem 0 0;
    font-size: 0.72rem;
    line-height: 1.65;
    color: var(--white-80);
}

#part-info-spec {
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.08em;
}

.section {
    margin-top: clamp(80px, 11vw, 170px);
}

.photo-gallery-section {
    margin-top: clamp(110px, 13vw, 210px);
}

.premium-band {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.9rem;
}

.premium-band-item {
    padding: 1rem 1.05rem;
}

.premium-band-item p {
    margin: 0 0 0.3rem;
    color: var(--white-55);
    font-size: 0.62rem;
    letter-spacing: 0.14em;
}

.premium-band-item h4 {
    margin: 0;
    font-size: clamp(1rem, 1.6vw, 1.4rem);
    line-height: 1.2;
}

.premium-band-meta {
    margin: 0.55rem 0 0;
    color: var(--white-80);
    font-size: 0.75rem;
    line-height: 1.7;
}

.apple-section {
    position: relative;
}

.section-head {
    margin-bottom: clamp(18px, 3vw, 34px);
}

.section-head p {
    margin: 0 0 0.45rem;
    color: var(--white-80);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
}

.section-head h3 {
    margin: 0;
    font-size: clamp(1.5rem, 3vw, 2.8rem);
    line-height: 1.12;
}

.manifesto-main {
    padding: clamp(1.5rem, 2.3vw, 2.2rem);
    margin-bottom: clamp(14px, 2vw, 22px);
}

.manifesto-main .quote {
    margin: 0;
    font-size: clamp(1.3rem, 2.6vw, 2.3rem);
    line-height: 1.28;
}

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

.manifesto-card {
    padding: 1.2rem;
    transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1), border-color 260ms ease;
}

.manifesto-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.26);
}

.manifesto-card h4 {
    margin: 0 0 0.6rem;
    font-size: 1.35rem;
    line-height: 1.22;
}

.manifesto-card p {
    margin: 0;
    color: var(--white-80);
    font-size: 0.84rem;
    line-height: 1.8;
}

.spec-table-wrap {
    overflow-x: auto;
}

.spec-table {
    width: 100%;
    min-width: 860px;
    border-collapse: collapse;
}

.spec-table th,
.spec-table td {
    border: 1px solid var(--white-10);
    padding: 0.8rem 0.86rem;
    text-align: left;
    font-size: 0.76rem;
    letter-spacing: 0.03em;
    color: var(--white-92);
}

.spec-table th {
    color: #ffffff;
    font-weight: 700;
}

.spec-note {
    margin: 0.9rem 0 0;
    color: var(--white-80);
    font-size: 0.7rem;
    line-height: 1.8;
    letter-spacing: 0.04em;
}

.cta-panel {
    padding: clamp(1.3rem, 2vw, 2rem);
}

.cta-panel h3 {
    margin: 0 0 1rem;
    font-size: clamp(1.2rem, 2.4vw, 2.1rem);
    line-height: 1.32;
}

.contact-meta {
    margin: 0.65rem 0 0;
    color: var(--white-80);
    font-size: 0.68rem;
    letter-spacing: 0.05em;
}

.site-footer {
    position: relative;
    isolation: isolate;
    margin-top: clamp(54px, 8vw, 112px);
    padding: clamp(1.35rem, 3vw, 2.5rem) 0;
    color: #ffffff;
    overflow: hidden;
}

.site-footer::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    z-index: -1;
    width: 100vw;
    transform: translateX(-50%);
    border-top: 1px solid var(--white-10);
    background:
        linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px),
        linear-gradient(180deg, rgba(255, 255, 255, 0.11), rgba(255, 255, 255, 0.035)),
        rgba(6, 31, 66, 0.32);
    background-size: 40px 100%, auto, auto;
}

.site-footer-inner {
    width: min(1240px, calc(100vw - 48px));
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
    gap: clamp(1.2rem, 4vw, 4rem);
}

.site-footer-main {
    display: grid;
    align-content: start;
    gap: 0.7rem;
}

.site-footer-kicker {
    margin: 0;
    color: var(--white-55);
    font-size: 0.66rem;
    letter-spacing: 0.16em;
}

.site-footer-wordmark {
    display: block;
    color: #ffffff;
    font-size: 5.6rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    line-height: 0.9;
}

.site-footer-copy {
    margin: 0;
    max-width: 560px;
    color: var(--white-80);
    font-size: 0.88rem;
    line-height: 1.75;
}

.site-footer-panel {
    display: grid;
    gap: 1rem;
    align-content: center;
    padding: 1rem 0 1rem clamp(1rem, 3vw, 2rem);
    border-left: 1px solid var(--white-10);
}

.site-footer-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.55rem 1rem;
}

.site-footer-links a {
    color: var(--white-80);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
}

.site-footer-links a:hover {
    color: #ffffff;
}

.site-footer-contact {
    display: grid;
    gap: 0.45rem;
    padding-top: 1rem;
    border-top: 1px solid var(--white-10);
}

.site-footer-contact a {
    color: var(--white-80);
    font-size: 0.72rem;
    letter-spacing: 0.04em;
}

.site-footer-contact a:hover {
    color: #ffffff;
}

.site-footer-legal {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.55rem;
    padding-top: 1rem;
    border-top: 1px solid var(--white-10);
}

.site-footer-legal a,
.site-footer-legal button {
    all: unset;
    cursor: pointer;
    color: var(--white-80);
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    font-family: inherit;
}

.site-footer-legal a:hover,
.site-footer-legal button:hover {
    color: #ffffff;
}

.site-footer-bottom {
    grid-column: 1 / -1;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--white-10);
    color: var(--white-55);
    font-size: 0.66rem;
    letter-spacing: 0.08em;
}

.site-footer-bottom a:hover {
    color: #ffffff;
}


.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: none;
}

body.has-anim .reveal {
    opacity: 1;
    transform: translateY(24px);
    transition: transform 900ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

body.has-anim .reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

[data-scroll-up] {
    transform: none;
    opacity: 1;
    will-change: auto;
    transition: none;
}

body.has-anim [data-scroll-up] {
    transform: translate3d(0, 120px, 0);
    opacity: 1;
    will-change: transform;
    transition: transform 180ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

@media (max-width: 1040px) {
    .entry-gateway-main {
        grid-template-columns: 1fr;
        min-height: auto;
        gap: 1.3rem;
        padding-bottom: 1.6rem;
    }

    .entry-logo-wrap {
        width: min(100%, 300px);
    }

    .entry-diagonal {
        display: none;
    }

    .entry-brand-line {
        width: min(480px, 100%);
    }

    .header-bar {
        grid-template-columns: 1fr auto 1fr;
        min-height: var(--header-strip-height);
        gap: 0.7rem;
    }

    .header-center,
    .header-right {
        justify-content: flex-end;
    }

    .landing {
        padding-top: var(--header-strip-height);
    }

    .container-full {
        width: calc(100vw - 26px);
    }

    .header-intro-inner {
        width: calc(100% - 26px);
        max-width: 1240px;
        grid-template-columns: minmax(0, 1fr) minmax(130px, 210px);
    }

    .header-intro-title {
        font-size: 5.2rem;
    }

    .hero {
        min-height: auto;
    }

    .cylinder-showcase-head {
        grid-template-columns: 1fr;
        align-items: start;
    }

    .cylinder-model-switcher {
        justify-content: flex-start;
    }

    .tank-model-switcher {
        grid-template-columns: 1fr;
    }

    .stage {
        min-height: 500px;
    }

    .cylinder-stage {
        min-height: 500px;
    }

    .product-marquee-mask {
        padding: 0.85rem 0;
    }

    .product-marquee-group {
        gap: 0.65rem;
        padding-inline: 0.65rem;
    }

    .product-marquee-item {
        min-height: 44px;
        padding: 0.72rem 0.95rem;
        font-size: 0.66rem;
    }

    .photo-strip-viewport {
        grid-auto-columns: minmax(230px, 44%);
        width: calc(100vw - 26px);
    }

    .part-info {
        right: 10px;
        bottom: 10px;
        width: calc(100% - 20px);
    }

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

    .premium-band {
        grid-template-columns: 1fr;
    }

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

    .site-footer-inner {
        grid-template-columns: 1fr;
    }

    .site-footer-wordmark {
        font-size: 3.8rem;
    }

    .site-footer-panel {
        padding: 1rem 0 0;
        border-left: 0;
        border-top: 1px solid var(--white-10);
    }

    .site-footer-links {
        grid-template-columns: 1fr;
    }

    .site-footer-bottom {
        flex-direction: column;
    }
}

@media (max-width: 780px) {
    .landing {
        padding-top: var(--header-strip-height);
    }

    .entry-gateway {
        margin-bottom: 14px;
    }

    .entry-gateway-head {
        min-height: clamp(50px, 9vw, 56px);
        font-size: 0.66rem;
    }

    .entry-logo-wrap {
        width: min(100%, 240px);
    }

    .entry-brand-sub {
        font-size: 0.64rem;
        letter-spacing: 0.16em;
    }

    .entry-brand-title {
        font-size: clamp(2.1rem, 12vw, 3.6rem);
    }

    .entry-brand-line {
        height: 1px;
    }

    .header-bar {
        grid-template-columns: 1fr;
        justify-items: start;
        min-height: auto;
        gap: 0.55rem;
    }

    .header-center,
    .header-right {
        justify-content: flex-start;
    }

    .header-center {
        flex-wrap: wrap;
        white-space: normal;
    }

    .stage-toolbar {
        padding: 0.82rem 0.82rem 0.9rem;
    }

    .cylinder-showcase-head {
        padding: 0.82rem 0.82rem 0.9rem;
    }

    .cylinder-showcase-title {
        font-size: 1.5rem;
    }

    .cylinder-model-switcher {
        gap: 0.55rem;
    }

    .model-button {
        padding: 0.7rem 0.92rem;
        font-size: 0.66rem;
    }

    .tank-model-switcher {
        gap: 0.55rem;
    }

    .tank-model-chip {
        padding: 0.82rem 0.86rem;
    }

    .tank-model-chip-title {
        font-size: 0.68rem;
    }

    .tank-model-chip-subtitle {
        font-size: 0.57rem;
    }

    .header-intro-inner {
        grid-template-columns: 1fr;
        min-height: 230px;
    }

    .header-intro-logo-wrap {
        width: min(100%, 170px);
        grid-column: auto;
        grid-row: auto;
        justify-self: start;
        transform: none;
    }

    .header-intro-copy {
        grid-column: auto;
        grid-row: auto;
    }

    .header-intro-kicker {
        font-size: 0.62rem;
        letter-spacing: 0.14em;
    }

    .header-intro-title {
        font-size: 3.25rem;
        letter-spacing: 0.08em;
    }

    .site-footer-wordmark {
        font-size: 2.45rem;
    }

    .product-marquee-track {
        animation-duration: 28s;
    }

    .photo-strip-viewport {
        grid-auto-columns: 82%;
        gap: 0.8rem;
        width: calc(100vw - 26px);
        padding: 0.82rem;
    }

    .photo-strip-button {
        min-width: 48px;
        padding: 0.6rem 0.68rem;
        transform: translateY(-50%);
    }

    .photo-strip-button[data-photo-slider-prev] {
        left: 8px;
        transform: translateY(-50%);
    }

    .photo-strip-button[data-photo-slider-next] {
        right: 8px;
        transform: translateY(-50%);
    }

    .photo-strip-image-box {
        min-height: 156px;
        padding: 0.82rem;
    }

    .photo-strip-image-box img {
        max-height: 148px;
    }

    .photo-lightbox {
        padding: 1rem;
    }

    .photo-lightbox-dialog {
        width: min(100%, calc(100vw - 24px));
        padding: 0.8rem;
    }

    .photo-lightbox-close {
        top: 0.55rem;
        right: 0.55rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .reveal,
    [data-scroll-up] {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }

    .btn:hover,
    .manifesto-card:hover,
    .tank-model-chip:hover {
        transform: none !important;
    }

    .typewriter-text::after,
    .typewriter-text.is-caret-active::after,
    .typewriter-text.is-caret-fixed::after {
        animation: none !important;
        opacity: 1 !important;
    }

    .hero-after-type {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }

    .product-marquee-track {
        animation: none !important;
    }

    .photo-strip-button:hover {
        transform: none !important;
    }

    .photo-strip-image-box:hover {
        transform: none !important;
    }

/* ── SSS (FAQ) ── */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    border-top: 1px solid var(--white-10);
}

.faq-item {
    border-bottom: 1px solid var(--white-10);
    padding: 0;
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.2rem 0;
    font-size: 1.05rem;
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: #ffffff;
    cursor: pointer;
    list-style: none;
    user-select: none;
    gap: 1rem;
}

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

.faq-question::after {
    content: "+";
    font-size: 1.3rem;
    font-family: 'Space Mono', monospace;
    font-weight: 400;
    opacity: 0.5;
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

.faq-item[open] .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    margin: 0;
    padding: 0 0 1.3rem;
    font-size: 0.78rem;
    font-family: 'Space Mono', monospace;
    line-height: 1.85;
    color: rgba(180, 210, 230, 0.82);
    max-width: 72ch;
    letter-spacing: 0.02em;
}

}
/* ── Blueprint Panel Overlay ── */
.bp-panel {
    position: absolute;
    inset: 0;
    z-index: 6;
    background: #0b2545;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.bp-tabbar {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 12px;
    background: #071a35;
    border-bottom: 1px solid rgba(74,144,196,0.3);
    flex-shrink: 0;
    flex-wrap: wrap;
}

.bp-tab {
    background: none;
    border: 1px solid rgba(74,144,196,0.3);
    color: rgba(126,223,255,0.8);
    font-family: "Space Mono","Courier New",monospace;
    font-size: 0.65rem;
    padding: 5px 10px;
    border-radius: 3px;
    cursor: pointer;
    letter-spacing: 0.04em;
    transition: background 0.12s, border-color 0.12s, color 0.12s;
    white-space: nowrap;
}

.bp-tab:hover {
    background: rgba(74,144,196,0.15);
    color: #fff;
}

.bp-tab-on {
    background: rgba(255,215,102,0.1);
    border-color: rgba(255,215,102,0.5);
    color: #ffd966;
}

.bp-hint {
    margin-left: auto;
    font-size: 0.6rem;
    color: rgba(74,144,196,0.6);
    letter-spacing: 0.08em;
    white-space: nowrap;
}

.bp-drawing {
    flex: 1;
    min-height: 0;
    overflow: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 16px;
}

.bp-drawing svg {
    max-width: 100%;
    height: auto;
    max-height: 100%;
}

.bp-tooltip {
    position: absolute;
    pointer-events: none;
    background: rgba(7,26,53,0.97);
    border: 1px solid rgba(74,144,196,0.7);
    border-radius: 5px;
    padding: 9px 12px;
    font-family: "Space Mono","Courier New",monospace;
    font-size: 0.68rem;
    color: rgba(255,255,255,0.9);
    max-width: 230px;
    line-height: 1.55;
    opacity: 0;
    transition: opacity 0.12s;
    z-index: 20;
}

.bp-tooltip strong {
    display: block;
    color: #ffd966;
    margin-bottom: 2px;
    font-size: 0.72rem;
}

.bp-tooltip em {
    display: block;
    color: rgba(126,223,255,0.85);
    font-style: normal;
    font-size: 0.62rem;
    margin-bottom: 5px;
    padding-bottom: 5px;
    border-bottom: 1px solid rgba(74,144,196,0.25);
}

.bp-tooltip-show { opacity: 1; }

/* Blueprint chip */
.tank-model-chip--blueprint .tank-model-chip-title { color: rgba(255,215,102,0.9); }
.tank-model-chip--blueprint { border-color: rgba(255,215,102,0.2); }
.tank-model-chip--blueprint:hover { border-color: rgba(255,215,102,0.4); }
.tank-model-chip--blueprint.is-active {
    border-color: rgba(255,215,102,0.55);
    background: linear-gradient(180deg,rgba(255,215,102,0.1),rgba(255,215,102,0.04));
}