/* Smart #3 independent study — technical automotive editorial system. */
.project-page {
  --s3-black: #050608;
  --s3-panel: #0b0d11;
  --s3-panel-soft: #11141a;
  --s3-text: #f3f5f7;
  --s3-muted: #969da6;
  --s3-line: rgba(255,255,255,.12);
  --s3-cyan: #74b7d7;
  background: var(--s3-black);
  color: var(--s3-text);
}

.s3-chapter {
  display: block;
  margin-bottom: 1.25rem;
  color: var(--s3-cyan);
  font: 500 12px/1.2 var(--sans);
  letter-spacing: .08em;
}

/* Hero: full-bleed on landscape, deliberately contained on portrait screens. */
.s3-hero {
  position: relative;
  min-height: 100svh;
  overflow: clip;
  background: #030405;
}
.s3-hero-img {
  position: absolute;
  inset: 0;
  overflow: hidden;
  contain: paint;
}
.s3-hero-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 54% center;
  display: block;
}
.s3-hero-vignette {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(3,4,5,.86) 0%, rgba(3,4,5,.28) 37%, transparent 64%),
    linear-gradient(0deg, rgba(3,4,5,.72) 0%, transparent 42%);
  pointer-events: none;
}
.s3-hero-identity {
  position: absolute;
  z-index: 2;
  left: var(--gutter);
  bottom: clamp(4.5rem, 10vh, 8rem);
  width: min(470px, 42vw);
}
.s3-hero-kicker {
  display: block;
  margin-bottom: 1rem;
  color: #fff;
  font: 600 13px/1.2 var(--sans);
  letter-spacing: .06em;
}
.s3-hero-wordmark { margin: 0; line-height: 0; }
.s3-hero-wordmark img {
  display: block;
  width: clamp(170px, 17vw, 260px);
  height: auto;
}
.s3-hero-identity p {
  margin: 1rem 0 0;
  max-width: 34ch;
  color: rgba(255,255,255,.72);
  font: 300 clamp(16px, 1.3vw, 20px)/1.45 var(--sans);
}
.s3-scroll-cue {
  position: absolute;
  z-index: 2;
  right: var(--gutter);
  bottom: 2rem;
  display: flex;
  align-items: center;
  gap: .65rem;
}
.s3-scroll-cue span { width: 42px; height: 1px; background: rgba(255,255,255,.35); }
.s3-scroll-cue i { width: 5px; height: 5px; border-radius: 50%; background: #fff; animation: s3Pulse 1.8s ease-in-out infinite; }
@keyframes s3Pulse { 50% { opacity: .2; transform: translateX(-8px); } }

/* Factual context */
.s3-intro {
  background: var(--s3-black);
  padding-block: clamp(7rem, 13vw, 13rem);
}
.s3-intro-grid,
.s3-credits-grid {
  display: grid;
  grid-template-columns: minmax(260px, .38fr) minmax(0, .62fr);
  gap: clamp(4rem, 9vw, 11rem);
}
.s3-facts {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  align-content: start;
  gap: 2.4rem 2rem;
}
.s3-facts > div { padding-top: .85rem; border-top: 1px solid var(--s3-line); }
.s3-facts dt {
  color: var(--s3-muted);
  font: 500 11px/1.2 var(--sans);
  letter-spacing: .08em;
}
.s3-facts dd {
  margin: .55rem 0 0;
  color: var(--s3-text);
  font: 400 clamp(14px, 1.05vw, 17px)/1.45 var(--sans);
}
.s3-intro-copy { max-width: 790px; }
.s3-intro h2,
.s3-details h2,
.s3-variants h2,
.s3-interior h2,
.s3-film h2,
.s3-credits h2 {
  margin: 0;
  font: 300 clamp(40px, 5.2vw, 76px)/1.03 var(--sans);
  letter-spacing: -.047em;
}
.s3-intro-copy > p {
  max-width: 58ch;
  margin: clamp(1.8rem, 3vw, 3rem) 0 0;
  color: #bec3c9;
  font: 300 clamp(18px, 1.55vw, 24px)/1.5 var(--sans);
}

/* Two editorial proof frames, not a repeated full-screen stack. */
.s3-details {
  padding-block: clamp(7rem, 11vw, 12rem);
  background: var(--s3-panel);
}
.s3-details-head { display: grid; grid-template-columns: minmax(0, .66fr) minmax(260px, .34fr); column-gap: 5vw; align-items: end; }
.s3-details-head .s3-chapter { grid-column: 1 / -1; }
.s3-details-head p {
  margin: 0 0 .45rem;
  color: var(--s3-muted);
  font: 300 clamp(16px, 1.2vw, 19px)/1.55 var(--sans);
}
.s3-details-layout {
  display: grid;
  grid-template-columns: repeat(12, minmax(0,1fr));
  gap: clamp(1rem, 2vw, 2rem);
  width: calc(100% - (2 * var(--gutter)));
  max-width: 1600px;
  margin-top: clamp(4rem, 7vw, 7rem);
}
.s3-detail-card { margin: 0; }
.s3-detail-card--apillar { grid-column: 1 / 8; grid-row: 1; }
.s3-detail-card--rear { grid-column: 8 / 13; grid-row: 1; margin-top: clamp(5rem, 10vw, 10rem); }
.s3-detail-card img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  background: #050608;
}
.s3-detail-card figcaption {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: .9rem;
  border-top: 1px solid var(--s3-line);
  color: var(--s3-muted);
  font: 400 12px/1.2 var(--sans);
}
.s3-detail-card figcaption strong { color: var(--s3-text); font-weight: 400; }

/* Editorial presentation-state study: related asset work, not a faux configurator. */
.s3-variants {
  padding-block: clamp(7rem, 12vw, 13rem);
  background: #07090c;
}
.s3-variants-head {
  display: grid;
  grid-template-columns: minmax(0, .64fr) minmax(280px, .36fr);
  gap: clamp(3rem, 7vw, 8rem);
  align-items: end;
  margin-bottom: clamp(3rem, 6vw, 6rem);
}
.s3-variants-head p {
  margin: 0 0 .35rem;
  max-width: 44ch;
  color: var(--s3-muted);
  font: 300 clamp(16px, 1.2vw, 19px)/1.55 var(--sans);
}
.s3-variant-editorial {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: clamp(1rem, 2.2vw, 2.5rem);
  row-gap: clamp(4.5rem, 8vw, 9rem);
}
.s3-variant-study { margin: 0; }
.s3-variant-study--featured { grid-column: 1 / -1; }
.s3-variant-study--blue { grid-column: 1 / 8; }
.s3-variant-study--red { grid-column: 8 / 13; margin-top: clamp(4rem, 9vw, 10rem); }
.s3-variant-study--white { grid-column: 3 / 11; }
.s3-variant-study img {
  display: block;
  width: 100%;
  height: auto;
  background: #040506;
}
.s3-variant-study figcaption {
  padding-top: .9rem;
  border-top: 1px solid var(--s3-line);
  color: var(--s3-muted);
  font: 400 11px/1.2 var(--sans);
  letter-spacing: .08em;
}

/* Interior chapter */
.s3-interior {
  padding-block: clamp(7rem, 12vw, 12rem);
  background: var(--s3-panel-soft);
}
.s3-interior-head {
  display: grid;
  grid-template-columns: minmax(0, .65fr) minmax(260px, .35fr);
  gap: clamp(3rem, 7vw, 8rem);
  align-items: end;
  margin-bottom: clamp(3rem, 6vw, 5rem);
}
.s3-interior-head .s3-chapter { grid-column: 1 / -1; }
.s3-interior-head p,
.s3-film-head p {
  max-width: 45ch;
  margin: 0 0 .35rem;
  color: var(--s3-muted);
  font: 300 clamp(16px, 1.2vw, 19px)/1.55 var(--sans);
}
.s3-360-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #030405;
  cursor: grab;
}
.s3-360-wrap:active { cursor: grabbing; }
.s3-360-canvas { width: 100% !important; height: 100% !important; display: block; }
.s3-360-wrap.is-active .s3-360-canvas { touch-action: none; }
.s3-360-canvas:focus-visible { outline: 2px solid var(--s3-cyan); outline-offset: -4px; }
.s3-360-overlay {
  position: absolute;
  inset: -2px;
  z-index: 5;
  display: grid;
  place-items: center;
  background: radial-gradient(ellipse at center, rgba(5,6,8,.62), rgba(5,6,8,.94) 72%);
  cursor: pointer;
  transition: opacity .55s cubic-bezier(.22,.61,.36,1);
}
.s3-360-overlay.is-dismissed { opacity: 0; pointer-events: none; }
.s3-360-overlay-content { display: grid; justify-items: center; gap: .8rem; padding: 2rem; text-align: center; pointer-events: none; }
.s3-360-overlay-icon { width: 48px; color: rgba(255,255,255,.5); }
.s3-360-overlay-content > span { color: var(--s3-cyan); font: 500 12px/1.2 var(--sans); }
.s3-360-overlay-content h3 { margin: .2rem 0 .8rem; font: 300 clamp(30px, 4vw, 54px)/1.05 var(--sans); letter-spacing: -.035em; }
.s3-360-enter-btn {
  pointer-events: auto;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  padding: .8rem 1.25rem;
  border: 1px solid rgba(255,255,255,.3);
  background: transparent;
  color: #fff;
  font: 500 13px/1 var(--sans);
  cursor: pointer;
}
.s3-360-enter-btn:hover { border-color: var(--s3-cyan); background: rgba(116,183,215,.09); }
.s3-360-enter-btn:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
.s3-360-hint {
  position: absolute;
  z-index: 3;
  left: 50%;
  bottom: 1.25rem;
  transform: translateX(-50%);
  padding: .6rem .9rem;
  border: 1px solid rgba(255,255,255,.15);
  background: rgba(3,4,5,.72);
  color: rgba(255,255,255,.68);
  font: 400 11px/1 var(--sans);
  pointer-events: none;
  white-space: nowrap;
  transition: opacity .25s ease;
}
.s3-360-hint.is-hidden { opacity: 0; }

/* Film payoff */
.s3-film {
  padding-block: clamp(8rem, 13vw, 13rem);
  background: var(--s3-black);
}
.s3-film-head {
  display: grid;
  grid-template-columns: minmax(0, .65fr) minmax(260px, .35fr);
  gap: clamp(3rem, 7vw, 8rem);
  align-items: end;
  margin-bottom: clamp(3rem, 6vw, 5rem);
}
.s3-film-head .s3-chapter { grid-column: 1 / -1; }
.s3-video-frame { width: 100%; aspect-ratio: 16 / 9; overflow: hidden; background: #000; }
.s3-video-frame video { display: block; width: 100%; height: 100%; object-fit: cover; }

/* Factual closing and visual handoff */
.s3-credits {
  padding-block: clamp(7rem, 12vw, 12rem);
  background: #0e1116;
}
.s3-credits h2 { max-width: 620px; }
.s3-credits .s3-facts { grid-template-columns: repeat(2, minmax(0,1fr)); }
.s3-next { background: #08091c; }
.s3-next a { position: relative; display: block; height: 74svh; min-height: 520px; overflow: hidden; color: #fff; }
.s3-next img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center; transition: transform .9s var(--ease); }
.s3-next-shade { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(8,9,28,.9), rgba(8,9,28,.06) 66%); }
.s3-next-copy { position: absolute; left: var(--gutter); bottom: clamp(3rem, 8vh, 7rem); display: grid; gap: .6rem; }
.s3-next-copy small,
.s3-next-copy span { color: #e5e7ef; font: 400 12px/1.4 var(--sans); letter-spacing: .035em; }
.s3-next-copy strong { font: 300 clamp(58px, 9vw, 128px)/.9 var(--sans); letter-spacing: -.06em; }
.s3-next a:focus-visible { outline: 2px solid #fff; outline-offset: -5px; }
@media (hover:hover) and (pointer:fine) { .s3-next a:hover img { transform: scale(1.025); } }

@media (max-width: 1024px) {
  .s3-hero-img { inset: clamp(10rem, 19svh, 15rem) 0 clamp(8rem, 17svh, 13rem); }
  .s3-hero-img img { object-fit: contain; object-position: center; }
  .s3-hero-vignette { background: linear-gradient(180deg, #030405 0%, transparent 18%, transparent 78%, #030405 100%); }
  .s3-hero-identity { top: calc(var(--nav-h) + 3.5rem); bottom: auto; width: min(560px, calc(100% - 2 * var(--gutter))); }
  .s3-hero-wordmark img { width: clamp(170px, 25vw, 240px); }
  .s3-intro-grid,
  .s3-credits-grid { grid-template-columns: 1fr; gap: 4.5rem; }
  .s3-facts { max-width: 720px; }
  .s3-details-head,
  .s3-variants-head,
  .s3-interior-head,
  .s3-film-head { grid-template-columns: 1fr; gap: 1.8rem; }
  .s3-details-layout { display: block; }
  .s3-detail-card { width: min(88%, 850px); }
  .s3-detail-card--rear { width: min(76%, 720px); margin: clamp(4rem, 10vw, 7rem) 0 0 auto; }
  .s3-variant-editorial { grid-template-columns: repeat(8, minmax(0, 1fr)); }
  .s3-variant-study--featured { grid-column: 1 / -1; }
  .s3-variant-study--blue { grid-column: 1 / 6; }
  .s3-variant-study--red { grid-column: 5 / 9; margin-top: clamp(3rem, 8vw, 6rem); }
  .s3-variant-study--white { grid-column: 2 / 8; }
  .s3-360-wrap { aspect-ratio: 4 / 3; }
}

@media (max-width: 600px) {
  .s3-hero-img { inset: 13.5rem 0 10rem; }
  .s3-hero-identity { top: calc(var(--nav-h) + 2.25rem); }
  .s3-hero-kicker { font-size: 12px; margin-bottom: .7rem; }
  .s3-hero-wordmark img { width: 165px; }
  .s3-hero-identity p { margin-top: .7rem; font-size: 15px; }
  .s3-scroll-cue { bottom: 1.25rem; }
  .s3-intro,
  .s3-details,
  .s3-variants,
  .s3-interior,
  .s3-film,
  .s3-credits { padding-block: 6.5rem; }
  .s3-facts { grid-template-columns: 1fr; gap: 1.4rem; }
  .s3-detail-card,
  .s3-detail-card--rear { width: 100%; }
  .s3-variant-editorial { display: block; }
  .s3-variant-study + .s3-variant-study { margin-top: 4rem; }
  .s3-variant-study--red { margin-top: 4rem; }
  .s3-360-shell { padding-inline: 0; }
  .s3-360-wrap { aspect-ratio: 3 / 4; }
  .s3-credits .s3-facts { grid-template-columns: 1fr; }
  .s3-next a { height: 64svh; min-height: 460px; }
}

@media (prefers-reduced-motion: reduce) {
  .s3-scroll-cue { display: none; }
  .s3-hero-identity,
  .s3-intro-copy,
  .s3-detail-card,
  .s3-variants-head,
  .s3-variant-study,
  .s3-interior-head,
  .s3-film-head,
  .s3-video-frame,
  .s3-credits { opacity: 1 !important; transform: none !important; filter: none !important; clip-path: none !important; }
  .s3-next img { transition: none; }
}