:root {
    --black: #050505;
    --panel: rgba(16, 16, 16, .88);
    --panel-strong: #0b0b0d;
    --red: #d91117;
    --red-hot: #ff2525;
    --steel: #d9d9d9;
    --muted: #b9b9b9;
    --line: rgba(255, 255, 255, .16);
    --shadow: 0 28px 80px rgba(0, 0, 0, .55);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(circle at 80% 18%, rgba(216, 17, 23, .28), transparent 28%),
        radial-gradient(circle at 8% 90%, rgba(255, 104, 0, .23), transparent 26%),
        linear-gradient(135deg, #020202 0%, #111 48%, #320406 100%);
    color: #fff;
    font-family: Arial, Helvetica, sans-serif;
    overflow-x: hidden;
    text-rendering: optimizeLegibility;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .025) 1px, transparent 1px);
    background-size: 42px 42px;
    mask-image: linear-gradient(to bottom, black, transparent 86%);
    z-index: 0;
}

a {
    color: inherit;
}

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

.site-heat {
    position: fixed;
    inset: auto -20% -18vh -20%;
    height: 45vh;
    pointer-events: none;
    background: repeating-radial-gradient(ellipse at bottom, rgba(255, 87, 0, .34) 0 2px, rgba(255, 0, 0, .12) 3px 8px, transparent 10px 23px);
    filter: blur(16px);
    animation: flame 6s ease-in-out infinite alternate;
    z-index: 0;
}

@keyframes flame {
    from { transform: translateX(-4%) skewX(-16deg) scaleY(.92); }
    to { transform: translateX(4%) skewX(10deg) scaleY(1.2); }
}

.embers span {
    position: fixed;
    left: var(--x);
    bottom: -20px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--red-hot);
    box-shadow: 0 0 18px #ff1600;
    animation: rise var(--d) linear infinite;
    animation-delay: var(--delay);
    z-index: 1;
}

@keyframes rise {
    0% { transform: translateY(0) scale(.6); opacity: 0; }
    15% { opacity: 1; }
    100% { transform: translateY(-110vh) translateX(58px) scale(1.4); opacity: 0; }
}

.site-header,
main,
.site-footer {
    position: relative;
    z-index: 2;
}

.site-header {
    width: min(1180px, calc(100% - 32px));
    margin: 18px auto 0;
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 12px 14px;
    border: 1px solid var(--line);
    background: rgba(7, 7, 7, .76);
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow);
    position: sticky;
    top: 12px;
    z-index: 20;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    text-transform: uppercase;
}

.brand-mark {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    border: 2px solid var(--red);
    background: #111;
    color: #fff;
    font-weight: 1000;
    letter-spacing: 0;
}

.brand strong,
.brand small {
    display: block;
}

.brand small {
    color: var(--muted);
    font-size: 12px;
    margin-top: 2px;
    letter-spacing: .12em;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}

.main-nav a,
.nav-toggle {
    border: 1px solid transparent;
    background: transparent;
    color: #fff;
    text-decoration: none;
    text-transform: uppercase;
    font-weight: 900;
    font-size: 13px;
    padding: 12px 14px;
}

.main-nav a.active,
.main-nav a:hover,
.nav-toggle:hover {
    border-color: rgba(255, 255, 255, .24);
    background: linear-gradient(135deg, rgba(217, 17, 23, .72), rgba(255, 255, 255, .08));
}

.main-nav .shop-link {
    border-color: rgba(255, 255, 255, .24);
    background: linear-gradient(135deg, var(--red-hot), #850004 62%, #242424);
    box-shadow: 0 0 18px rgba(255, 0, 0, .42);
}

.nav-toggle {
    display: none;
}

.hero {
    width: min(1180px, calc(100% - 32px));
    margin: 28px auto 0;
    min-height: calc(100vh - 130px);
    display: grid;
    grid-template-columns: minmax(280px, 42%) minmax(0, 1fr);
    align-items: center;
    gap: clamp(24px, 5vw, 64px);
}

.hero-media {
    position: relative;
    min-height: 640px;
    overflow: hidden;
    border: 1px solid var(--line);
    box-shadow: 0 0 44px rgba(217, 17, 23, .34), var(--shadow);
    background: #000;
}

.hero-media img {
    width: 100%;
    height: 100%;
    min-height: 640px;
    object-fit: cover;
    filter: contrast(1.08) saturate(.9);
}

.scan-line {
    position: absolute;
    inset: 0;
    background: linear-gradient(110deg, transparent 0%, rgba(255, 255, 255, .18) 45%, transparent 58%);
    transform: translateX(-120%);
    animation: shine 4.6s infinite;
}

@keyframes shine {
    55%, 100% { transform: translateX(120%); }
}

.eyebrow {
    margin: 0 0 14px;
    color: var(--red-hot);
    font-size: clamp(13px, 1.4vw, 16px);
    font-weight: 1000;
    letter-spacing: .16em;
    text-transform: uppercase;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1,
h2,
h3 {
    text-transform: uppercase;
    line-height: .94;
}

h1 {
    margin-bottom: 22px;
    font-size: clamp(40px, 5.8vw, 78px);
    letter-spacing: 0;
    font-style: italic;
    text-shadow: 0 10px 22px rgba(0, 0, 0, .84);
}

h2 {
    margin-bottom: 18px;
    font-size: clamp(28px, 3.7vw, 48px);
}

h3 {
    margin-bottom: 10px;
    font-size: clamp(22px, 2.45vw, 34px);
}

.lead,
.hero-copy p,
.section p,
.page-hero p {
    color: #ebebeb;
    font-size: clamp(17px, 1.55vw, 20px);
    line-height: 1.45;
}

.hero-actions,
.slider-controls {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 14px 20px;
    border: 1px solid rgba(255, 255, 255, .24);
    text-decoration: none;
    text-transform: uppercase;
    font-weight: 1000;
    cursor: pointer;
}

.button.primary {
    background: linear-gradient(135deg, var(--red-hot), #830003 58%, #272727);
    box-shadow: 0 0 28px rgba(255, 0, 0, .62);
}

.button.secondary {
    background: rgba(255, 255, 255, .08);
}

.ticker {
    margin: 28px 0;
    border-block: 1px solid rgba(255, 255, 255, .18);
    overflow: hidden;
    background: linear-gradient(90deg, #080808, #750000, #161616);
}

.ticker div {
    display: flex;
    width: max-content;
    animation: ticker 24s linear infinite;
}

.ticker span {
    padding: 14px 28px;
    color: #fff;
    font-size: 18px;
    font-weight: 1000;
    text-transform: uppercase;
    white-space: nowrap;
}

@keyframes ticker {
    to { transform: translateX(-50%); }
}

.section,
.slideshow-section,
.page-hero {
    width: min(1180px, calc(100% - 32px));
    margin: 72px auto;
}

.proof-strip,
.feature-grid,
.timeline-grid,
.recognition-grid {
    display: grid;
    gap: 16px;
}

.proof-strip {
    grid-template-columns: repeat(3, 1fr);
    margin-top: 42px;
}

.proof-strip article,
.feature-grid article,
.timeline-grid article,
.recognition-grid article,
.hero-stat-card,
.product-callout {
    border: 1px solid var(--line);
    background: linear-gradient(145deg, rgba(18, 18, 18, .92), rgba(7, 7, 7, .84));
    box-shadow: var(--shadow);
}

.proof-strip article {
    padding: 22px;
}

.proof-strip strong {
    display: block;
    color: #fff;
    font-size: clamp(24px, 3vw, 38px);
    text-transform: uppercase;
    line-height: .95;
}

.proof-strip span,
.hero-stat-card span {
    display: block;
    color: var(--muted);
    line-height: 1.45;
    margin-top: 8px;
}

.intro-grid,
.split-panel,
.contact-layout,
.bio-layout,
.about-layout,
.about-hero,
.product-callout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(22px, 4vw, 48px);
    align-items: start;
}

.section-head {
    max-width: 760px;
    margin-bottom: 26px;
}

.slider {
    position: relative;
    min-height: 650px;
    overflow: hidden;
    border: 1px solid var(--line);
    background: linear-gradient(145deg, rgba(20, 20, 20, .94), rgba(4, 4, 4, .82));
    box-shadow: var(--shadow);
}

.slide {
    position: absolute;
    inset: 0;
    display: grid;
    grid-template-columns: minmax(280px, 45%) 1fr;
    align-items: stretch;
    opacity: 0;
    transform: translateX(7%) scale(.98);
    transition: opacity .7s ease, transform .7s ease;
    pointer-events: none;
}

.slide.is-active {
    opacity: 1;
    transform: translateX(0) scale(1);
    pointer-events: auto;
}

.slide-image {
    position: relative;
    min-height: 650px;
    background: #fff;
    overflow: hidden;
}

.slide-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.slide-image.btb-brochure {
    background: #050505;
}

.slide-image.btb-brochure img {
    object-fit: cover;
    object-position: center center;
}

.slide-copy {
    padding: clamp(28px, 5vw, 64px);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.slide-count {
    color: var(--red-hot);
    font-size: 58px;
    font-weight: 1000;
    line-height: .8;
    opacity: .85;
}

.tagline {
    color: var(--red-hot);
    font-weight: 1000;
    text-transform: uppercase;
}

.slide-copy ul,
.check-list {
    margin: 20px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 10px;
}

.slide-copy li,
.check-list li {
    padding: 11px 12px;
    border-left: 4px solid var(--red);
    background: rgba(255, 255, 255, .06);
}

.slider-controls {
    position: absolute;
    left: 24px;
    right: 24px;
    bottom: 20px;
    justify-content: space-between;
}

.slider-controls button {
    border: 1px solid rgba(255, 255, 255, .24);
    background: rgba(0, 0, 0, .72);
    color: #fff;
    min-height: 42px;
    padding: 10px 14px;
    text-transform: uppercase;
    font-weight: 900;
    cursor: pointer;
}

.dots {
    display: flex;
    gap: 8px;
}

.dots button {
    width: 14px;
    min-height: 14px;
    height: 14px;
    padding: 0;
    border-radius: 99px;
}

.dots button.is-active {
    background: var(--red-hot);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
}

.product-card,
.bio-card,
.contact-panel,
.contact-form,
.bio-main,
.feature-article {
    border: 1px solid var(--line);
    background: var(--panel);
    box-shadow: var(--shadow);
}

.product-card {
    display: grid;
    grid-template-rows: 260px 1fr;
    overflow: hidden;
}

.product-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: #fff;
}

.product-card div,
.bio-card,
.bio-main,
.feature-article,
.contact-panel,
.contact-form {
    padding: 22px;
}

.product-card h3 {
    font-size: 23px;
}

.product-card p,
.bio-card li,
.bio-main p,
.contact-panel p,
.contact-form label {
    color: var(--steel);
    line-height: 1.45;
}

.split-panel {
    align-items: center;
    padding: clamp(26px, 4vw, 44px);
    border: 1px solid var(--line);
    background: linear-gradient(135deg, rgba(217, 17, 23, .24), rgba(255, 255, 255, .05));
}

.performance-band {
    padding: clamp(26px, 4vw, 48px);
    border: 1px solid var(--line);
    background: linear-gradient(135deg, rgba(255, 255, 255, .055), rgba(217, 17, 23, .16));
}

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

.feature-grid article {
    padding: 22px;
}

.feature-grid h3,
.timeline-grid h3 {
    font-size: clamp(21px, 2vw, 28px);
}

.page-hero.compact {
    min-height: 390px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-bottom: 1px solid var(--line);
}

.about-hero {
    min-height: 430px;
    align-items: center;
    border-bottom: 1px solid var(--line);
}

.about-hero h1 {
    max-width: 860px;
}

.about-hero p {
    max-width: 900px;
}

.hero-stat-card {
    padding: clamp(24px, 4vw, 38px);
    align-self: stretch;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-stat-card strong {
    display: block;
    margin-top: 10px;
    font-size: clamp(28px, 3.4vw, 46px);
    line-height: .95;
    text-transform: uppercase;
}

.sticky-card {
    position: sticky;
    top: 112px;
}

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

.timeline-grid article {
    padding: clamp(22px, 3vw, 32px);
}

.timeline-grid span {
    display: inline-block;
    color: var(--red-hot);
    font-size: 42px;
    font-weight: 1000;
    line-height: 1;
    margin-bottom: 12px;
}

.timeline-grid ul,
.recognition-grid ul {
    margin: 18px 0 0;
    padding-left: 20px;
    color: var(--steel);
    line-height: 1.48;
}

.timeline-grid li + li {
    margin-top: 8px;
}

.recognition-grid {
    grid-template-columns: 1.25fr .9fr .9fr;
}

.recognition-grid article {
    padding: clamp(22px, 3vw, 30px);
}

.product-callout {
    align-items: center;
    padding: clamp(28px, 4vw, 48px);
    background: linear-gradient(135deg, rgba(217, 17, 23, .28), rgba(255, 255, 255, .06));
}

.page-hero.compact h1 {
    max-width: 900px;
}

.page-hero.compact p {
    max-width: 840px;
}

.bio-main h2,
.bio-card h2,
.contact-panel h2 {
    font-size: clamp(24px, 2.5vw, 34px);
}

.media-strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.media-strip img {
    width: 100%;
    height: 430px;
    object-fit: cover;
    border: 1px solid var(--line);
    background: #fff;
}

.contact-email {
    display: inline-block;
    margin-top: 18px;
    color: var(--red-hot);
    font-size: clamp(24px, 3vw, 38px);
    font-weight: 1000;
    word-break: break-word;
}

.contact-form {
    display: grid;
    gap: 16px;
}

.contact-form label {
    display: grid;
    gap: 8px;
    font-weight: 900;
    text-transform: uppercase;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, .24);
    background: rgba(255, 255, 255, .08);
    color: #fff;
    font: inherit;
    padding: 13px 14px;
}

.contact-form textarea {
    resize: vertical;
}

.site-footer {
    width: min(1180px, calc(100% - 32px));
    margin: 80px auto 24px;
    padding: 22px 0 0;
    border-top: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    color: var(--muted);
}

.site-footer strong,
.site-footer span {
    display: block;
}

.site-footer a {
    color: #fff;
    font-weight: 900;
}

@media (max-width: 980px) {
    .hero,
    .slide,
    .intro-grid,
    .split-panel,
    .contact-layout,
    .bio-layout,
    .about-layout,
    .about-hero,
    .product-callout {
        grid-template-columns: 1fr;
    }

    .hero {
        min-height: auto;
    }

    .hero-media,
    .hero-media img,
    .slide-image,
    .slider {
        min-height: 520px;
    }

    .slide {
        position: absolute;
    }

    .slide-copy {
        background: rgba(0, 0, 0, .88);
    }

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

    .proof-strip,
    .feature-grid,
    .timeline-grid,
    .recognition-grid {
        grid-template-columns: 1fr;
    }

    .sticky-card {
        position: static;
    }

    .media-strip {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 680px) {
    body {
        background:
            radial-gradient(circle at 80% 12%, rgba(216, 17, 23, .2), transparent 26%),
            linear-gradient(135deg, #020202 0%, #101010 58%, #260305 100%);
    }

    .site-header {
        align-items: flex-start;
        flex-wrap: wrap;
        width: min(100% - 20px, 1180px);
        margin-top: 10px;
        top: 8px;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .main-nav {
        width: 100%;
        display: none;
        flex-direction: column;
        align-items: stretch;
    }

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

    .hero-media,
    .hero-media img,
    .slide-image,
    .slider {
        min-height: 390px;
    }

    .hero {
        width: min(100% - 20px, 1180px);
        margin-top: 20px;
    }

    h1 {
        font-size: clamp(34px, 11vw, 46px);
    }

    h2 {
        font-size: clamp(26px, 8.5vw, 34px);
    }

    .lead,
    .hero-copy p,
    .section p,
    .page-hero p {
        font-size: 16px;
    }

    .section,
    .slideshow-section,
    .page-hero {
        width: min(100% - 20px, 1180px);
        margin: 48px auto;
    }

    .slide {
        display: block;
        overflow-y: auto;
    }

    .slide-image {
        height: 280px;
        min-height: 280px;
    }

    .slide-image.btb-brochure img {
        object-fit: contain;
    }

    .slide-copy {
        padding-bottom: 100px;
    }

    .slider-controls {
        left: 12px;
        right: 12px;
        bottom: 12px;
    }

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

    .product-card {
        grid-template-rows: 220px 1fr;
    }

    .proof-strip article,
    .feature-grid article,
    .timeline-grid article,
    .recognition-grid article,
    .product-callout,
    .hero-stat-card {
        padding: 18px;
    }

    .site-footer {
        align-items: flex-start;
        flex-direction: column;
    }
}