/* ==================================================================
   SKATEBOARD — clean case-study layout
   Full-bleed film hero, credits strip, a visible blueprint grid,
   numbered chapters, small text in narrow columns, big media bands.
   Colours come from the homepage (css/styles.css).
   ================================================================== */

.sk-page {
  --sk-bg:     var(--color-bg);          /* #F2F2F0 */
  --sk-ink:    var(--color-text);        /* #1C1C1C */
  --sk-muted:  var(--color-muted);       /* #8A8A86 */
  --sk-line:   var(--color-line);        /* #D6D6D2 */
  --sk-accent: var(--color-accent);      /* #F15A23 */
  --sk-dark:   #0F0F0F;                  /* media bands */
  --sk-light:  var(--color-header-fg);   /* #EDEDEA */
  --sk-grid:   rgba(28, 28, 28, 0.06);   /* blueprint column lines */
  --sk-tall:   "Six Caps", "Oswald", "Arial Narrow", sans-serif;
  --sk-mono:   "DM Mono", ui-monospace, Menlo, monospace;
  --sk-max:    1320px;
  background: var(--sk-bg);
  color: var(--sk-ink);
}

main.sk { max-width: none; padding: 0; }

/* container */
.sk-wrap {
  position: relative;
  max-width: var(--sk-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* faint 6-column blueprint lines behind light sections */
.sk-grid {
  --col: calc((min(100vw, var(--sk-max)) - 2 * var(--gutter)) / 6);
  background-image: linear-gradient(90deg, var(--sk-grid) 1px, transparent 1px);
  background-size: var(--col) 100%;
  background-position: max(var(--gutter), calc((100vw - var(--sk-max)) / 2 + var(--gutter))) 0;
}

/* "+" registration marks at the top corners of a section */
.sk-plus { position: relative; }
.sk-plus::before,
.sk-plus::after {
  content: "+";
  position: absolute;
  top: -0.55em;
  font: 300 16px/1 var(--font-sans);
  color: var(--sk-muted);
}
.sk-plus::before { left: max(calc(var(--gutter) - 0.3em), calc((100vw - var(--sk-max)) / 2 + var(--gutter) - 0.3em)); }
.sk-plus::after  { right: max(calc(var(--gutter) - 0.3em), calc((100vw - var(--sk-max)) / 2 + var(--gutter) - 0.3em)); }

.sk-mono {
  font-family: var(--sk-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--sk-muted);
}

/* ------------------------------------------------------------------
   Hero — full-bleed film, tall title bottom-left
   ------------------------------------------------------------------ */
.sk-hero {
  position: relative;
  height: calc(100vh - var(--header-h));
  height: calc(100svh - var(--header-h));
  min-height: 480px;
  overflow: hidden;
  background: var(--sk-dark);
  color: #fff;
}
.sk-hero video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.sk-hero::after {                      /* soft shade so the title reads */
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0.08) 45%, transparent 70%),
    linear-gradient(0deg, rgba(0,0,0,0.45) 0%, transparent 42%);
  pointer-events: none;
}
.sk-hero__copy {
  position: absolute;
  z-index: 1;
  left: 0;
  right: 0;
  bottom: clamp(28px, 6vh, 72px);
}
.sk-hero h1 {
  margin: 0;
  font-family: var(--sk-tall);
  font-size: clamp(5.5rem, 3rem + 9vw, 12rem);
  font-weight: 400;
  line-height: 0.86;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}
.sk-hero__sub {
  margin: 14px 0 0;
  font-size: 0.8125rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
}
.sk-hero__controls {
  position: absolute;
  z-index: 1;
  right: max(var(--gutter), calc((100vw - var(--sk-max)) / 2 + var(--gutter)));
  bottom: clamp(28px, 6vh, 72px);
  display: flex;
  gap: 6px;
}
.sk-btn {
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 0;
  background: rgba(15, 15, 15, 0.35);
  color: #fff;
  font-family: var(--sk-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.sk-btn:hover { background: rgba(255, 255, 255, 0.12); border-color: #fff; }
.sk-btn[aria-pressed="true"] { border-color: var(--sk-accent); }

/* ------------------------------------------------------------------
   Credits strip
   ------------------------------------------------------------------ */
.sk-credits {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px clamp(20px, 3vw, 48px);
  margin: 0 auto;
  padding-block: clamp(36px, 5vw, 64px) clamp(56px, 7vw, 96px);
}
.sk-credits div { border-top: 1px solid var(--sk-ink); padding-top: 8px; }
.sk-credits dt { margin-bottom: 10px; }
.sk-credits dd { margin: 0; font-size: 0.875rem; line-height: 1.5; }

/* ------------------------------------------------------------------
   Chapter header — thin wide title + big number
   ------------------------------------------------------------------ */
.sk-chapter { padding-top: clamp(64px, 9vw, 120px); }
.sk-chapter__label { display: block; margin-bottom: 6px; }
.sk-chapter__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  padding: 10px 0 8px;
  border-top: 1px solid var(--sk-ink);
  border-bottom: 1px solid var(--sk-line);
}
.sk-chapter h2,
.sk-chapter__num {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(2.5rem, 1rem + 5.4vw, 6rem);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}
.sk-chapter__num { font-variant-numeric: tabular-nums; }

/* ------------------------------------------------------------------
   Text blocks — small, narrow, lots of space
   ------------------------------------------------------------------ */
.sk-text {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0 clamp(20px, 3vw, 40px);
  padding: clamp(48px, 7vw, 96px) 0;
}
.sk-text__body { grid-column: 3 / span 2; }
.sk-text__body--right { grid-column: 4 / span 2; margin-top: 32px; }
.sk-text h3 {
  margin: 0 0 12px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.sk-text p {
  margin: 0 0 1em;
  font-size: 0.875rem;
  font-weight: var(--fw-light);
  line-height: 1.7;
}
.sk-text p:last-child { margin-bottom: 0; }

/* ------------------------------------------------------------------
   Build steps — 4 columns, image + caption
   ------------------------------------------------------------------ */
.sk-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(12px, 1.6vw, 20px);
  margin: 0;
  padding: 0 0 clamp(56px, 7vw, 96px);
  list-style: none;
}
.sk-steps figure { margin: 0; }
.sk-steps img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  background: var(--sk-line);
}
.sk-steps figcaption {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--sk-line);
}
.sk-steps b { font-size: 0.8125rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }
.sk-steps p { margin: 6px 0 0; font-size: 0.8125rem; font-weight: var(--fw-light); line-height: 1.55; color: #555; }

/* ------------------------------------------------------------------
   Pull quote — tall caps, accent mark
   ------------------------------------------------------------------ */
.sk-quote {
  display: grid;
  justify-items: center;
  margin: 0 auto;
  padding-block: clamp(72px, 10vw, 140px);
  text-align: center;
}
.sk-quote blockquote {
  position: relative;
  margin: 0;
  font-family: var(--sk-tall);
  font-size: clamp(3.5rem, 2rem + 5vw, 7.5rem);
  line-height: 0.9;
  text-transform: uppercase;
}
.sk-quote blockquote::before {          /* speech mark */
  content: "";
  position: absolute;
  left: -0.5em;
  top: -0.1em;
  width: 0.34em;
  height: 0.3em;
  background: var(--sk-accent);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 35% 70%, 0 100%);
}
.sk-quote cite { margin-top: 18px; font-style: normal; }

/* ------------------------------------------------------------------
   Dark media band
   ------------------------------------------------------------------ */
.sk-band {
  background: var(--sk-dark);
  color: var(--sk-light);
  padding: clamp(24px, 4vw, 56px) 0;
}
.sk-band__grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: clamp(8px, 1.2vw, 16px);
}
.sk-band figure { margin: 0; }
.sk-band img { display: block; width: 100%; height: auto; }
.sk-band .w6 { grid-column: span 6; }
.sk-band .w3 { grid-column: span 3; }
.sk-band .w2 { grid-column: span 2; }
.sk-band figcaption { margin-top: 8px; color: #8C8C88; }

.sk-film video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  background: #000;
}
.sk-film__meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 10px;
}

/* ------------------------------------------------------------------
   Paper to screen — process row + storyboard grid
   ------------------------------------------------------------------ */
.sk-process {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: 0 0 clamp(40px, 5vw, 64px);
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--sk-ink);
}
.sk-process li {
  padding: 10px 12px 12px 0;
  font-size: 0.8125rem;
  font-weight: 500;
}
.sk-process li + li { padding-left: 12px; border-left: 1px solid var(--sk-line); }
.sk-process li span { display: block; margin-bottom: 4px; }
.sk-process li.is-final { color: var(--sk-accent); }

.sk-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(12px, 1.6vw, 20px);
  margin: 0;
  padding: 0 0 clamp(56px, 7vw, 96px);
  list-style: none;
}
.sk-board figure { margin: 0; }
.sk-board img {
  display: block;
  width: 100%;
  height: auto;
  background: #fff;
  border: 1px solid var(--sk-line);
}
.sk-board figcaption { margin-top: 8px; }

/* early idea — four sketches in a row */
.sk-idea {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(12px, 1.6vw, 20px);
  margin: 0;
  padding: 0 0 clamp(56px, 7vw, 96px);
  list-style: none;
}
.sk-idea figure { margin: 0; }
.sk-idea img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
  background: #fff;
  border: 1px solid var(--sk-line);
}
.sk-idea figcaption { margin-top: 8px; }

/* ------------------------------------------------------------------
   Next projects
   ------------------------------------------------------------------ */
.sk-next {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(12px, 1.6vw, 20px);
  margin: 0;
  padding: clamp(28px, 4vw, 48px) 0 0;
  list-style: none;
}
.sk-next a { display: block; }
.sk-next img,
.sk-next video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: grayscale(1);
  transition: filter 500ms var(--ease);
}
.sk-next a:hover img,
.sk-next a:hover video { filter: none; }
.sk-next span {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--sk-line);
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: color var(--dur) var(--ease);
}
.sk-next a:hover span { color: var(--sk-accent); }

/* ------------------------------------------------------------------
   Chapter tracker — fixed on the right edge
   ------------------------------------------------------------------ */
.sk-track {
  position: fixed;
  z-index: 40;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.sk-track a {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  min-height: 28px;
  font-family: var(--sk-mono);
  font-size: 0.625rem;
  color: var(--sk-muted);
  transition: color var(--dur) var(--ease);
}
.sk-track a::after {
  content: "";
  width: 12px;
  height: 1px;
  background: currentColor;
  transition: width var(--dur) var(--ease);
}
.sk-track a:hover { color: var(--sk-ink); }
.sk-track a.is-active { color: var(--sk-accent); }
.sk-track a.is-active::after { width: 24px; }

.sk-page .info { margin-top: clamp(96px, 12vw, 160px); }

/* ------------------------------------------------------------------
   Tablet + phone
   ------------------------------------------------------------------ */
@media (max-width: 1100px) {
  .sk-track { display: none; }
}
@media (max-width: 900px) {
  .sk-credits { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sk-text__body, .sk-text__body--right { grid-column: 2 / span 4; }
  .sk-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 28px; }
  .sk-process { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .sk-process li:nth-child(4) { border-left: 0; padding-left: 0; }
  .sk-idea { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .sk-hero { height: auto; min-height: 0; aspect-ratio: 4 / 5; }
  .sk-hero__controls { left: var(--gutter); right: auto; bottom: auto; top: 16px; }
  .sk-text { grid-template-columns: 1fr; }
  .sk-text__body, .sk-text__body--right { grid-column: 1; }
  .sk-process { grid-template-columns: 1fr 1fr; }
  .sk-process li:nth-child(n) { border-left: 0; padding-left: 0; }
  .sk-process li:nth-child(even) { padding-left: 12px; border-left: 1px solid var(--sk-line); }
  .sk-board { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sk-board li:last-child:nth-child(odd) { grid-column: 1 / -1; }
  .sk-band__grid > * { grid-column: span 6 !important; }
  .sk-next { grid-template-columns: 1fr; }
  .sk-quote blockquote::before { left: 0; top: -0.42em; }
}