/* =========================================================
   BMW M8 Competition — premium dark automotive theme
   Display: Archivo Expanded · Body: Manrope · Mono: IBM Plex Mono
   ========================================================= */

:root {
  color-scheme: dark;

  /* surfaces */
  --bg: #08090b;
  --bg-elev: #0e1014;
  --bg-card: #121419;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.18);

  /* ink */
  --ink: #f4f5f7;
  --ink-dim: #a6abb4;
  --ink-faint: #6b7079;

  /* BMW M motorsport tri-color */
  --m-blue: #00a2e0;
  --m-violet: #6f2da8;
  --m-red: #e2001a;
  --m-gradient: linear-gradient(
    100deg,
    var(--m-blue) 0%,
    var(--m-violet) 52%,
    var(--m-red) 100%
  );

  --accent: var(--m-blue);

  /* type */
  --font-display: "Archivo Expanded", system-ui, sans-serif;
  --font-body: "Manrope", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  /* rhythm */
  --pad-x: clamp(1.25rem, 5vw, 6rem);
  --section-y: clamp(5rem, 12vh, 10rem);
  --radius: 4px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  line-height: 1.65;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* film-grain atmosphere over the whole page */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

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

::selection {
  background: var(--m-blue);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--m-blue);
  outline-offset: 3px;
}

/* ---------- shared bits ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.eyebrow__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--m-red);
  box-shadow: 0 0 12px var(--m-red);
}

.section-head {
  padding: 0 var(--pad-x);
  margin-bottom: clamp(2.5rem, 6vw, 4.5rem);
  max-width: 1500px;
  margin-inline: auto;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 1rem + 4.2vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin-top: 0.9rem;
  max-width: 16ch;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.95em 1.6em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform 0.4s var(--ease), background 0.3s, color 0.3s,
    border-color 0.3s;
  will-change: transform;
}
.btn span {
  transition: transform 0.4s var(--ease);
}
.btn:hover span {
  transform: translateX(4px);
}
.btn--solid {
  background: var(--ink);
  color: #0a0a0a;
}
.btn--solid:hover {
  background: #fff;
  transform: translateY(-2px);
}
.btn--ghost {
  border-color: var(--line-strong);
  color: var(--ink);
}
.btn--ghost:hover {
  border-color: var(--ink);
  background: rgba(255, 255, 255, 0.04);
  transform: translateY(-2px);
}
.btn--lg {
  padding: 1.15em 2em;
  font-size: 0.85rem;
}

/* =========================================================
   NAV
   ========================================================= */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.15rem var(--pad-x);
  transition: background 0.4s, backdrop-filter 0.4s, border-color 0.4s,
    padding 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(8, 9, 11, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--line);
  padding-block: 0.85rem;
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.nav__stripe {
  width: 6px;
  height: 26px;
  border-radius: 2px;
  background: var(--m-gradient);
}
.nav__mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.4rem;
  letter-spacing: 0.02em;
}
.nav__sub {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-dim);
  align-self: flex-end;
  padding-bottom: 0.2rem;
}

.nav__links {
  display: flex;
  gap: 2.2rem;
  margin-left: auto;
}
.nav__links a {
  position: relative;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  padding: 0.3rem 0;
  transition: color 0.3s;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--m-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.nav__links a:hover,
.nav__links a.is-active {
  color: var(--ink);
}
.nav__links a:hover::after,
.nav__links a.is-active::after {
  transform: scaleX(1);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.7em 1.2em;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  transition: border-color 0.3s, background 0.3s;
}
.nav__cta:hover {
  border-color: var(--ink);
  background: rgba(255, 255, 255, 0.05);
}
.nav__cta span {
  transition: transform 0.4s var(--ease);
}
.nav__cta:hover span {
  transform: translateX(4px);
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--pad-x);
  padding-bottom: clamp(3rem, 9vh, 7rem);
  overflow: hidden;
  isolation: isolate;
}

.hero__media {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 42%;
  /* slow cinematic zoom */
  animation: kenburns 22s ease-out forwards;
  transform-origin: 60% 50%;
}
@keyframes kenburns {
  from {
    transform: scale(1.12);
  }
  to {
    transform: scale(1);
  }
}
.hero__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(
      180deg,
      rgba(8, 9, 11, 0.55) 0%,
      rgba(8, 9, 11, 0.12) 32%,
      rgba(8, 9, 11, 0.78) 78%,
      var(--bg) 100%
    ),
    linear-gradient(90deg, rgba(8, 9, 11, 0.7) 0%, transparent 55%);
}
.hero__glow {
  position: absolute;
  left: -10%;
  bottom: -30%;
  width: 60%;
  height: 70%;
  background: radial-gradient(
    closest-side,
    rgba(0, 162, 224, 0.22),
    transparent 70%
  );
  filter: blur(20px);
}

.hero__inner {
  position: relative;
  max-width: 1500px;
  width: 100%;
  margin-inline: auto;
}

.hero__eyebrow {
  margin-bottom: 1.4rem;
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 0.86;
  letter-spacing: -0.03em;
  font-size: clamp(3.5rem, 1rem + 15vw, 13rem);
  text-transform: uppercase;
}
.hero__line {
  display: block;
}
.hero__line--accent {
  background: var(--m-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: 0.42em;
  letter-spacing: 0.04em;
  font-weight: 800;
  margin-top: 0.4rem;
}

.hero__copy {
  margin-top: 1.8rem;
  max-width: 46ch;
  color: var(--ink-dim);
  font-size: clamp(1rem, 0.95rem + 0.4vw, 1.2rem);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.4rem;
}

/* telemetry block, top-right */
.hero__telemetry {
  position: absolute;
  top: clamp(6rem, 16vh, 10rem);
  right: var(--pad-x);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--line);
  border-left: 2px solid var(--m-blue);
  border-radius: var(--radius);
  background: rgba(8, 9, 11, 0.4);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.telemetry__row {
  display: flex;
  justify-content: space-between;
  gap: 1.6rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
}
.telemetry__k {
  color: var(--ink-faint);
  text-transform: uppercase;
}
.telemetry__v {
  color: var(--ink);
  font-weight: 500;
}

/* scroll cue */
.hero__scroll {
  position: absolute;
  bottom: clamp(1.4rem, 3vh, 2.2rem);
  right: var(--pad-x);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-dim);
  writing-mode: vertical-rl;
}
.hero__scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(var(--ink-dim), transparent);
  position: relative;
  overflow: hidden;
}
.hero__scroll-line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--m-blue);
  animation: scrollDrop 2s var(--ease) infinite;
}
@keyframes scrollDrop {
  0% {
    transform: translateY(-100%);
  }
  60%,
  100% {
    transform: translateY(100%);
  }
}

/* hero entrance — staggered */
.hero__eyebrow,
.hero__title .hero__line,
.hero__copy,
.hero__actions,
.hero__telemetry {
  opacity: 0;
  transform: translateY(28px);
  animation: rise 1s var(--ease) forwards;
}
.hero__eyebrow {
  animation-delay: 0.15s;
}
.hero__title .hero__line:nth-child(1) {
  animation-delay: 0.3s;
}
.hero__title .hero__line:nth-child(2) {
  animation-delay: 0.45s;
}
.hero__copy {
  animation-delay: 0.6s;
}
.hero__actions {
  animation-delay: 0.75s;
}
.hero__telemetry {
  animation-delay: 0.95s;
}
@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =========================================================
   MARQUEE
   ========================================================= */
.marquee {
  position: relative;
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: var(--bg-elev);
  padding-block: 1.3rem;
}
.marquee__track {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  width: max-content;
  animation: marquee 32s linear infinite;
}
.marquee__track span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.1rem, 0.9rem + 1vw, 1.9rem);
  letter-spacing: 0.01em;
  text-transform: uppercase;
  white-space: nowrap;
}
.marquee__track i {
  color: var(--m-red);
  font-style: normal;
  font-size: 0.9rem;
}
@keyframes marquee {
  to {
    transform: translateX(-50%);
  }
}

/* =========================================================
   SPECS
   ========================================================= */
.specs {
  padding-block: var(--section-y);
}
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: 1500px;
  margin-inline: auto;
  padding: 0 var(--pad-x);
  border-top: 1px solid var(--line);
}
.stat {
  display: flex;
  flex-direction: column;
  padding: 2.4rem 1.6rem 2.4rem 0;
  border-right: 1px solid var(--line);
  position: relative;
}
.stat:last-child {
  border-right: none;
}
.stat::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 38px;
  height: 2px;
  background: var(--m-gradient);
}
.stat__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.8rem, 1.5rem + 4vw, 5rem);
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}
.stat__unit {
  margin-top: 0.9rem;
  font-weight: 600;
  color: var(--ink);
}
.stat__meta {
  margin-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* =========================================================
   FEATURE / EDITORIAL
   ========================================================= */
.feature {
  padding-block: var(--section-y);
}
.feature__row {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  max-width: 1500px;
  margin-inline: auto;
  padding: 0 var(--pad-x);
  margin-bottom: clamp(3rem, 7vw, 6rem);
}
.feature__row:last-child {
  margin-bottom: 0;
}
.feature__row--reverse .feature__media {
  order: 2;
}

.feature__media {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
}
.feature__media::after {
  content: "";
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 120px rgba(0, 0, 0, 0.5);
  pointer-events: none;
}
.feature__media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 1.2s var(--ease);
}
.feature__row:hover .feature__media img {
  transform: scale(1.05);
}

.feature__index {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--m-blue);
  margin-bottom: 1rem;
}
.feature__text h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 1rem + 2vw, 2.6rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.1rem;
}
.feature__text p {
  color: var(--ink-dim);
  max-width: 48ch;
}

/* =========================================================
   GALLERY
   ========================================================= */
.gallery {
  padding-block: var(--section-y);
}
.gallery__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(0.75rem, 1.5vw, 1.25rem);
  max-width: 1500px;
  margin-inline: auto;
  padding: 0 var(--pad-x);
}
.gallery__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}
.gallery__item--wide {
  grid-column: 1 / -1;
}
.gallery__item img {
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 1s var(--ease), filter 0.6s;
  filter: saturate(0.92) brightness(0.92);
}
.gallery__item--wide img {
  aspect-ratio: 21 / 9;
}
.gallery__item:hover img {
  transform: scale(1.06);
  filter: saturate(1.05) brightness(1);
}
.gallery__item figcaption {
  position: absolute;
  left: 1.1rem;
  bottom: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.45em 0.8em;
  background: rgba(8, 9, 11, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  border-radius: 2px;
  transform: translateY(8px);
  opacity: 0;
  transition: transform 0.5s var(--ease), opacity 0.5s var(--ease);
}
.gallery__item:hover figcaption {
  transform: translateY(0);
  opacity: 1;
}

/* =========================================================
   CTA
   ========================================================= */
.cta {
  position: relative;
  padding: clamp(5rem, 14vh, 11rem) var(--pad-x);
  text-align: center;
  border-top: 1px solid var(--line);
  background: radial-gradient(
    120% 100% at 50% 0%,
    rgba(0, 162, 224, 0.08),
    transparent 60%
  );
}
.cta__inner {
  max-width: 26ch;
  margin-inline: auto;
}
.cta__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.8rem, 1rem + 4vw, 4rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
  margin: 1.2rem 0 2.4rem;
}

/* =========================================================
   FOOTER
   ========================================================= */
.footer {
  border-top: 1px solid var(--line);
  background: var(--bg-elev);
  padding: clamp(2.5rem, 6vw, 4rem) var(--pad-x);
}
.footer__top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--line);
  max-width: 1500px;
  margin-inline: auto;
}
.footer__brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
}
.footer__note {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.footer__credits {
  max-width: 1500px;
  margin: 1.6rem auto 0;
  font-size: 0.85rem;
  color: var(--ink-faint);
}
.footer__credits p {
  margin-bottom: 0.6rem;
}
.footer__credits ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.6rem;
  margin-bottom: 1rem;
}
.footer__credits a {
  color: var(--ink-dim);
  border-bottom: 1px solid var(--line-strong);
  transition: color 0.3s, border-color 0.3s;
}
.footer__credits a:hover {
  color: var(--m-blue);
  border-color: var(--m-blue);
}
.footer__legal {
  color: var(--ink-faint);
}

/* =========================================================
   SCROLL REVEALS (progressive enhancement)
   ========================================================= */
.js .reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 900px) {
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat:nth-child(2) {
    border-right: none;
  }
  .stat:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }
  .feature__row,
  .feature__row--reverse .feature__media {
    grid-template-columns: 1fr;
    order: 0;
  }
  .hero__telemetry {
    display: none;
  }
}

@media (max-width: 620px) {
  .nav__links {
    display: none;
  }
  .gallery__grid {
    grid-template-columns: 1fr;
  }
  .stats {
    grid-template-columns: 1fr;
  }
  .stat {
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding-right: 0;
  }
  .stat:last-child {
    border-bottom: none;
  }
  .hero__scroll {
    display: none;
  }
}

/* =========================================================
   REDUCED MOTION
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .hero__img {
    transform: none;
  }
  .js .reveal {
    opacity: 1;
    transform: none;
  }
}