/* ============================================================
   V4 CASE STUDY — editorial case layout
   Extends the locked V4 system (v4-home.css provides shell).
   Used by /work/cravy/ (and future case studies).
   ============================================================ */

/* header active state */
.v4-nav a.is-active { color: var(--v4-lime); opacity: 1; }
.v4-nav a.is-active::after { transform: scaleX(1); }

.v4-cs-num {
  font: 700 10px/1 var(--v4-latin);
  letter-spacing: 0.18em;
  color: var(--v4-faint);
}
.v4-cs-title {
  margin: 0;
  font-family: var(--v4-display);
  font-weight: 400;
  font-size: clamp(22px, 2.2vw, 30px);
  line-height: 1;
  letter-spacing: 0.012em;
  text-transform: uppercase;
  color: var(--v4-ink);
}
.v4-cs-note {
  margin: 0 0 0 auto;
  font-family: var(--v4-ar-display);
  font-size: 14px;
  line-height: 1.75;
  color: var(--v4-mut);
  text-align: right;
}
.v4-cs-cap {
  font: 600 8px/1.8 var(--v4-latin);
  letter-spacing: 0.22em;
  color: var(--v4-mut);
}
.v4-cs-cap i {
  display: inline-block;
  width: 14px;
  height: 1px;
  margin-right: 8px;
  vertical-align: middle;
  background: var(--v4-lime);
}

.v4-cs-media img { display: block; width: 100%; height: 100%; object-fit: cover; }

/* ============================================================
   HERO
   ============================================================ */

.v4-cs-hero {
  position: relative;
  padding-top: var(--v4-header-h);
  border-bottom: 1px solid var(--v4-line);
  overflow: clip;
  background: var(--v4-bg);
}

.v4-cs-hero-in {
  display: grid;
  grid-template-columns: minmax(0, 0.54fr) minmax(0, 0.46fr);
  align-items: stretch;
}

.v4-cs-hero-type {
  display: flex;
  flex-direction: column;
  padding: 26px 32px 30px;
}

.v4-cs-crumbs {
  margin: 0 0 22px;
  font: 700 8.5px/1 var(--v4-latin);
  letter-spacing: 0.26em;
  color: var(--v4-faint);
}
.v4-cs-crumbs a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}
.v4-cs-crumbs a:hover { color: var(--v4-lime); }

.v4-cs-hero-type h1 {
  margin: 0;
  font-family: var(--v4-display);
  font-weight: 400;
  font-size: clamp(64px, 9.4vw, 138px);
  line-height: 0.92;
  letter-spacing: 0.004em;
  color: var(--v4-ink);
}
.v4-cs-hero-ar {
  margin: 6px 0 0;
  font-family: var(--v4-ar-display);
  font-weight: 900;
  font-size: clamp(26px, 2.6vw, 38px);
  line-height: 1.4;
  color: var(--v4-ink);
}
.v4-cs-hero-tag {
  margin: 16px 0 0;
  font: 700 10.5px/1.6 var(--v4-latin);
  letter-spacing: 0.26em;
  color: var(--v4-mut);
}
.v4-cs-hero-tag b { color: var(--v4-ink); font-weight: 700; }

.v4-cs-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: auto;
  padding-top: 26px;
}
.v4-cs-meta > div {
  padding: 14px 16px 0 0;
  border-top: 1px solid var(--v4-line);
}
.v4-cs-meta > div + div { padding-left: 16px; }
.v4-cs-meta small {
  display: block;
  margin-bottom: 7px;
  font: 700 7.5px/1 var(--v4-latin);
  letter-spacing: 0.24em;
  color: var(--v4-faint);
}
.v4-cs-meta b {
  display: block;
  font: 600 11px/1.6 var(--v4-latin);
  letter-spacing: 0.08em;
  color: var(--v4-ink);
}

.v4-cs-hero-media {
  position: relative;
  border-left: 1px solid var(--v4-line);
  overflow: hidden;
  min-height: 420px;
}
.v4-cs-hero-media img {
  object-position: 50% 42%;
}
.v4-cs-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, rgba(11, 11, 10, 0.42), transparent 26%);
}

/* ============================================================
   SECTIONS
   ============================================================ */

.v4-cs-sec { border-bottom: 1px solid var(--v4-line); }

.v4-cs-sec-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 24px 32px 18px;
}

/* 02 — visual language */
.v4-cs-vl {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
}
.v4-cs-vl-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 54px 40px;
  border-right: 1px solid var(--v4-line);
}
.v4-cs-vl-logo img {
  width: min(560px, 78%);
  height: auto;
}
.v4-cs-vl-palette {
  padding: 30px 32px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.v4-cs-swatch {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--v4-line-soft);
}
.v4-cs-swatch:last-of-type { border-bottom: 0; }
.v4-cs-swatch i {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  border: 1px solid var(--v4-line);
}
.v4-cs-swatch b {
  font: 600 9.5px/1.5 var(--v4-latin);
  letter-spacing: 0.18em;
  color: var(--v4-ink);
}
.v4-cs-swatch span {
  margin-left: auto;
  font: 500 10px/1 var(--v4-latin);
  letter-spacing: 0.1em;
  color: var(--v4-mut);
}
.v4-cs-vl-cap {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--v4-line);
  font-size: 12px;
  line-height: 1.9;
  color: var(--v4-mut);
}

/* 03 — campaign world */
.v4-cs-bleed { position: relative; }
.v4-cs-bleed img { aspect-ratio: 16 / 9; }
.v4-cs-bleed-cap {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 32px;
  border-top: 1px solid var(--v4-line);
}
.v4-cs-bleed-cap p {
  margin: 0 0 0 auto;
  font-family: var(--v4-ar-display);
  font-size: 13px;
  color: var(--v4-mut);
  text-align: right;
}

.v4-cs-split {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
  border-top: 1px solid var(--v4-line);
}
.v4-cs-split > figure {
  margin: 0;
  border-right: 1px solid var(--v4-line);
}
.v4-cs-split > figure:last-child { border-right: 0; }
.v4-cs-split img { aspect-ratio: 16 / 10; }
.v4-cs-split-inner {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 40px 32px 0;
}
.v4-cs-split-inner img { width: 78%; margin-left: auto; aspect-ratio: 16 / 9; }

/* 04 — applications */
.v4-cs-seq {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--v4-line);
}
.v4-cs-seq > figure {
  margin: 0;
  padding: 22px 32px 26px 0;
}
.v4-cs-seq > figure + figure {
  padding-left: 32px;
  padding-right: 0;
  border-left: 1px solid var(--v4-line);
}
.v4-cs-seq figcaption { margin-bottom: 12px; }
.v4-cs-seq img { aspect-ratio: 1.42 / 1; }

.v4-cs-pack {
  display: grid;
  grid-template-columns: minmax(0, 0.46fr) minmax(0, 0.54fr);
  border-top: 1px solid var(--v4-line);
}
.v4-cs-pack-media {
  border-right: 1px solid var(--v4-line);
  padding: 26px 32px;
}
.v4-cs-pack-media img { aspect-ratio: 5 / 6.4; }
.v4-cs-pack-copy {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 40px 32px 34px;
}
.v4-cs-pack-copy p {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.9;
  color: var(--v4-mut);
}
.v4-cs-pack-copy p:first-child {
  font-family: var(--v4-ar-display);
  font-size: 15px;
  color: var(--v4-ink);
}

/* 05 — system strip */
.v4-cs-strip {
  display: grid;
  grid-template-columns: 1.35fr 1.35fr 1.35fr 1.1fr 1.1fr 1.1fr;
  gap: 12px;
  padding: 22px 32px 30px;
  border-top: 1px solid var(--v4-line);
}
.v4-cs-strip figure { margin: 0; }
.v4-cs-strip .v4-cs-media { aspect-ratio: 4 / 3; overflow: hidden; background: var(--v4-bg-2); }
.v4-cs-strip figcaption { margin-top: 10px; }

/* 06 — closing + next */
.v4-cs-closing-media img { aspect-ratio: 16 / 8.4; }
.v4-cs-closing-in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
  padding: 30px 32px 34px;
  border-top: 1px solid var(--v4-line);
}
.v4-cs-closing-copy p {
  margin: 0;
  font-family: var(--v4-ar-display);
  font-weight: 900;
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.6;
  color: var(--v4-ink);
}
.v4-cs-closing-copy span {
  display: block;
  margin-top: 8px;
  font: 700 9px/1 var(--v4-latin);
  letter-spacing: 0.26em;
  color: var(--v4-mut);
}
.v4-cs-next {
  display: flex;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  padding: 12px 14px;
  border: 1px solid var(--v4-line);
  transition: border-color 0.25s ease;
}
.v4-cs-next:hover { border-color: var(--v4-ink); }
.v4-cs-next-thumb {
  width: 108px;
  height: 72px;
  overflow: hidden;
  flex: 0 0 auto;
}
.v4-cs-next-thumb img { object-position: 50% 30%; }
.v4-cs-next small {
  display: block;
  margin-bottom: 6px;
  font: 700 8px/1 var(--v4-latin);
  letter-spacing: 0.24em;
  color: var(--v4-mut);
}
.v4-cs-next b {
  display: block;
  font-family: var(--v4-display);
  font-weight: 400;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--v4-ink);
}
.v4-cs-next i {
  margin-left: auto;
  font-style: normal;
  color: var(--v4-lime);
  font-size: 16px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1180px) {
  .v4-cs-hero-in { grid-template-columns: minmax(0, 1fr) minmax(0, 0.5fr); }
  .v4-cs-hero-type h1 { font-size: clamp(58px, 8.6vw, 110px); }
  .v4-cs-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
}

@media (max-width: 1023px) {
  .v4-cs-hero-in { grid-template-columns: 1fr; }
  .v4-cs-hero-media {
    border-left: 0;
    border-top: 1px solid var(--v4-line);
    min-height: 0;
    aspect-ratio: 16 / 9;
  }
  .v4-cs-hero-media::after { background: linear-gradient(0deg, rgba(11, 11, 10, 0.4), transparent 34%); }
  .v4-cs-hero-type { padding: 22px 24px 26px; }
  .v4-cs-sec-head { padding: 22px 24px 16px; flex-wrap: wrap; gap: 10px; }
  .v4-cs-note { margin-left: 0; width: 100%; text-align: left; }
  .v4-cs-vl-logo { padding: 40px 24px; }
  .v4-cs-vl-palette { padding: 24px; }
  .v4-cs-bleed-cap { padding: 12px 24px; }
  .v4-cs-split { grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); }
  .v4-cs-seq > figure { padding: 18px 24px 22px 0; }
  .v4-cs-seq > figure + figure { padding-left: 24px; }
  .v4-cs-pack-media { padding: 22px 24px; }
  .v4-cs-pack-copy { padding: 30px 24px 28px; }
  .v4-cs-strip { padding: 18px 24px 26px; }
  .v4-cs-closing-in { padding: 26px 24px 30px; }
}

@media (max-width: 640px) {
  .v4-cs-hero-type { padding: 18px 18px 22px; }
  .v4-cs-hero-type h1 { font-size: clamp(52px, 17vw, 84px); }
  .v4-cs-hero-media { aspect-ratio: 4 / 3; }
  .v4-cs-meta { grid-template-columns: repeat(2, minmax(0, 1fr)); padding-top: 20px; }
  .v4-cs-meta > div { padding: 12px 12px 0 0; }
  .v4-cs-meta > div + div { padding-left: 12px; }

  .v4-cs-sec-head { padding: 20px 18px 14px; }

  /* mobile curation — hide the secondary studies */
  .v4-cs-vl { display: none; }
  .v4-cs-strip { display: none; }
  .v4-cs-pack { display: none; }
  .v4-cs-split { grid-template-columns: 1fr; }
  .v4-cs-split > figure { border-right: 0; }
  .v4-cs-split > figure:last-child { display: none; }
  .v4-cs-seq { grid-template-columns: 1fr; }
  .v4-cs-seq > figure { padding: 18px 18px 20px; }
  .v4-cs-seq > figure + figure { display: none; }
  .v4-cs-bleed-cap { padding: 12px 18px; flex-wrap: wrap; }
  .v4-cs-bleed-cap p { margin-left: 0; text-align: left; }

  .v4-cs-closing-media { display: none; }
  .v4-cs-closing-in { padding: 24px 18px 28px; }
  .v4-cs-next { width: 100%; }
}