/* ============================================================
   CASE STUDY — brand v2 brutalist
   Extends colors_and_type.css + site.css with case-study layouts
   ============================================================ */

/* ============ Topbar (statico, no scroll-hide) ============ */
.cs-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--ink);
  border-bottom: 1px solid var(--line-dark);
}
.cs-topbar__inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 32px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.cs-topbar__back {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mute);
  text-transform: uppercase;
  transition: color var(--dur-fast) var(--ease-brut);
}
.cs-topbar__back:hover { color: var(--fg); }
.cs-topbar__back::before { content: "← "; }
.cs-topbar__logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}
.cs-topbar__right { display: flex; align-items: center; gap: 16px; }
.cs-lang {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.cs-lang a { color: var(--mute); padding: 4px 6px; }
.cs-lang a.is-active { color: var(--fg); }
.cs-lang a:hover { color: var(--accent); }
.cs-lang__sep { color: var(--line-dark); }
@media (max-width: 720px) {
  .cs-topbar__inner { padding: 0 16px; gap: 12px; }
  .cs-topbar__logo {
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
  }
  /* back: solo freccia, niente label per non andare a capo */
  .cs-topbar__back { font-size: 0; flex-shrink: 0; }
  .cs-topbar__back::before { font-size: 16px; content: "←"; }
  .cs-topbar__right { gap: 8px; flex-shrink: 0; }
  .cs-lang { font-size: 11px; }
  .cs-lang a { padding: 4px 4px; }
}

/* ============ Hero ============ */
.cs-hero {
  border-bottom: 1px solid var(--line-dark);
  padding-block: 96px 120px;
  position: relative;
}
.cs-hero__inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}
.cs-hero__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mute);
}
.cs-hero__label .tag-num { color: var(--accent); }
.cs-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(48px, 9vw, 120px);
  line-height: 0.92;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin: 24px 0 0;
  max-width: 16ch;
}
.cs-hero__desc {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.55;
  color: var(--fg);
  max-width: 60ch;
  margin: 24px 0 0;
}
.cs-hero__sub {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--mute);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.cs-hero__sub b { color: var(--fg); font-weight: 500; }
.cs-hero__tags {
  list-style: none;
  padding: 0;
  margin: 32px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.cs-hero__tags li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 8px 12px;
  border: 1px solid var(--line-dark);
  color: var(--mute);
}
.cs-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 40px;
}
@media (max-width: 720px) {
  .cs-hero { padding-block: 56px 64px; }
  .cs-hero__inner { padding: 0 20px; }
}

/* ============ Section content (article body) ============ */
.cs-section {
  border-bottom: 1px solid var(--line-dark);
  padding-block: 120px;
  position: relative;
}
.cs-section--paper {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--line-light);
}
.cs-section--paper p, .cs-section--paper .cs-quote { color: #3d3d3d; }
.cs-section__inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: minmax(0, 380px) minmax(0, 1fr);
  gap: 96px;
  align-items: start;
}
.cs-section__label {
  position: sticky;
  top: 96px;
}
.cs-section__label .tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mute);
}
.cs-section__label .tag-num { color: var(--accent); }
.cs-section__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 5vw, 64px);
  line-height: 1;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin: 16px 0 0;
}
.cs-section__body {
  display: grid;
  gap: 24px;
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.55;
  align-self: center; /* centra verticalmente body vs colonna label/title alta */
}
/* Vincolo readability solo sul testo, non su metric/video che devono spannare wide */
.cs-section__body > p,
.cs-section__body > ul,
.cs-section__body > blockquote { max-width: 64ch; }
/* Inline accent per evidenziare 1-2 parole (pattern: LandingV2 hero swap) */
.cs-accent { color: var(--accent); }
.cs-section__body p { margin: 0; }
.cs-section__body ul {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
  display: grid;
  gap: 12px;
}
.cs-section__body ul li {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  padding-left: 28px;
  position: relative;
  color: var(--mute);
  text-transform: uppercase;
}
.cs-section--paper .cs-section__body ul li { color: #3d3d3d; }
.cs-section__body ul li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
}
.cs-quote {
  border-left: 2px solid var(--accent);
  padding: 8px 0 8px 20px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--fg);
}
@media (max-width: 960px) {
  .cs-section { padding-block: 64px; }
  .cs-section__inner {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 0 20px;
  }
  .cs-section__label { position: static; }
}

/* ============ Video frame ============ */
.cs-video-frame {
  margin: 0;
  border: 1px solid var(--line-dark);
  background: var(--ink);
}
.cs-section--paper .cs-video-frame { border-color: var(--line-light); background: var(--paper); }
.cs-video-frame__label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mute);
}
.cs-section--paper .cs-video-frame__label { border-color: var(--line-light); color: #3d3d3d; }
.cs-video-frame__label .label::before { content: "// "; color: var(--mute); }
.cs-video-frame__media {
  position: relative;
  overflow: hidden;
  background: #000;
  /* aspect esplicito perché Tailwind aspect-[4/5]/sm:aspect-video non sono caricati in V2 */
  aspect-ratio: 4 / 5;
}
@media (min-width: 640px) {
  .cs-video-frame__media { aspect-ratio: 16 / 9; }
}
/* Poster statici brutalist — sempre 16:9, no crop verticale mobile */
.cs-video-frame__media--still { aspect-ratio: 16 / 9; }
.cs-video-frame__media--still img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
/* kill any glow / shadow that Remotion-built mp4 wrappers might add */
.cs-video-frame__media :where(div, video) {
  box-shadow: none !important;
  filter: none !important;
  border-radius: 0 !important;
}
.cs-video-frame__media video,
.cs-video-frame__media > div,
.cs-video-frame__media > div > video {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover;
  display: block;
}
/* Nascondi overlay controlli del VideoPlayer (play/pause + barra + timer).
   Il VideoPlayer renderizza la barra come <div class="absolute …"> figlio diretto
   del wrapper; il <video> è figlio diretto dello stesso wrapper ma non è .absolute. */
.cs-video-frame__media .absolute { display: none !important; }
.cs-video-frame__cap {
  padding: 12px 16px;
  border-top: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mute);
  text-transform: uppercase;
}
.cs-section--paper .cs-video-frame__cap { border-color: var(--line-light); color: #3d3d3d; }

/* ============ Stack grid ============ */
.cs-stack-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: -1px;
  margin: 32px 0 0;
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}
.cs-section--paper .cs-stack-grid {
  border-color: var(--line-light);
}
.cs-stack-item {
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color var(--dur-fast) var(--ease-brut), background var(--dur-fast) var(--ease-brut);
}
.cs-section--paper .cs-stack-item {
  border-right-color: var(--line-light);
  border-bottom-color: var(--line-light);
}
.cs-stack-item:hover {
  background: var(--accent);
}
.cs-stack-item:hover .cs-stack-item__num,
.cs-stack-item:hover .cs-stack-item__name,
.cs-stack-item:hover .cs-stack-item__role {
  color: var(--ink);
}
.cs-stack-item__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mute);
}
.cs-stack-item__name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}
.cs-stack-item__role {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mute);
  text-transform: uppercase;
}
@media (max-width: 720px) {
  .cs-stack-grid { grid-template-columns: 1fr; }
}

/* ============ Metrics (numerals) ============ */
.cs-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 32px 0 0;
  border-top: 1px solid var(--line-dark);
}
.cs-metric {
  padding: 32px 24px;
  border-right: 1px solid var(--line-dark);
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: hidden; /* impedisce sborda metric vicina */
  min-width: 0;
}
.cs-metric:last-child { border-right: none; }
.cs-metric__num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(32px, 4.5vw, 56px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.cs-metric__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mute);
}
@media (max-width: 720px) {
  .cs-metrics { grid-template-columns: 1fr; border-top: none; }
  .cs-metric {
    border-right: none;
    border-top: 1px solid var(--line-dark);
    padding: 24px 0;
  }
}

/* ============ Final CTA block ============ */
.cs-cta {
  border-bottom: 1px solid var(--line-dark);
  padding-block: 120px;
  background: var(--paper);
  color: var(--ink);
}
.cs-cta__inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  gap: 32px;
}
.cs-cta__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #3d3d3d;
}
.cs-cta__label .tag-num { color: var(--accent); }
.cs-cta__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(40px, 6vw, 88px);
  line-height: 0.95;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin: 16px 0 0;
  max-width: 18ch;
}
.cs-cta__sub {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.5;
  max-width: 60ch;
  color: #3d3d3d;
}
.cs-cta__actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 16px; }
@media (max-width: 720px) {
  .cs-cta { padding-block: 64px; }
  .cs-cta__inner { padding: 0 20px; }
}

/* ============ Footer (single-line mono) ============ */
.cs-footer {
  padding: 32px 0;
  background: var(--ink);
  color: var(--mute);
}
.cs-footer__inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}
.cs-footer__inner a:hover { color: var(--accent); }
.cs-footer__links { display: flex; gap: 24px; }
@media (max-width: 720px) {
  .cs-footer__inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 0 20px;
  }
}

/* ============ Buttons reuse (paper-context inversion) ============ */
.cs-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid currentColor;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-brut), color var(--dur-fast) var(--ease-brut);
}
.cs-btn:hover { background: var(--fg); color: var(--ink); }
.cs-btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
}
.cs-btn--primary:hover { background: var(--ink); color: var(--accent); }
.cs-section--paper .cs-btn, .cs-cta .cs-btn { color: var(--ink); }
.cs-section--paper .cs-btn:hover, .cs-cta .cs-btn:hover { background: var(--ink); color: var(--paper); }
.cs-section--paper .cs-btn--primary, .cs-cta .cs-btn--primary {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}
.cs-section--paper .cs-btn--primary:hover, .cs-cta .cs-btn--primary:hover {
  background: var(--accent);
  color: var(--ink);
  border-color: var(--accent);
}