/* =========================================================
   CASOS — sección #casos del home (index.html)
   Todo va con prefijo .casos para no pisar otros estilos.
   ========================================================= */
.casos {
  --casos-bg: #09121C;          /* Petro Galopante */
  --casos-card: #0c1823;
  --casos-line: rgba(255, 255, 255, 0.07);
  --casos-text: #F1F0F0;        /* Hueso */
  --casos-muted: #d9d8d8;
  --casos-accent: #EB455D;      /* Coral */
  --casos-aqua: #B3ECE6;        /* Aquamarina */
  --casos-divider: #09121C;     /* línea diagonal entre imágenes (Petro) */
  --casos-slant: 56px;          /* inclinación del corte */
  --casos-gap: 7px;             /* grosor de la línea diagonal */
  --casos-font: "Montserrat", system-ui, sans-serif;

  background: var(--casos-bg);
  color: var(--casos-text);
  font-family: var(--casos-font);
  /* Igual que #somos, #hacemos y #galeria: tiene que quedar por encima
     de #home-video-section (position:fixed, z-index:10). */
  position: relative;
  z-index: 20;
}

/* ---------- Encabezado ---------- */
.casos__header {
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(56px, 9vw, 120px) clamp(20px, 6vw, 72px) clamp(32px, 4vw, 44px);
}
.casos__eyebrow {
  margin: 0 0 12px;
  color: var(--casos-accent);
  font-weight: 600;
  font-size: clamp(14px, 1.6vw, 22px);
  letter-spacing: 0.28em;
  text-transform: uppercase;
}
.casos__title {
  margin: 0;
  font-weight: 800;
  font-size: clamp(34px, 6vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.03em;
}
.casos__title em,
.casos__title .casos__hl {
  font-style: normal;
  color: var(--casos-aqua);
}
.casos__lead {
  margin: 18px 0 0;
  color: var(--casos-muted);
  font-weight: 300;
  font-size: clamp(17px, 2.1vw, 28px);
  line-height: 1.35;
}

/* ---------- Zona de tarjetas (fondo con textura sutil) ---------- */
.casos__grid {
  position: relative;
  border-top: 1px solid var(--casos-line);
  padding: 26px clamp(16px, 3.5vw, 46px) clamp(56px, 7vw, 90px);
  background:
    radial-gradient(1200px 500px at 20% 0%, rgba(40, 70, 95, 0.18), transparent 60%),
    radial-gradient(900px 600px at 90% 100%, rgba(30, 55, 75, 0.20), transparent 60%),
    repeating-radial-gradient(circle at 30% 40%, rgba(255,255,255,0.012) 0 2px, transparent 2px 6px),
    #070f17;
}
.casos__list {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 1130px;
  display: grid;
  gap: 26px;
}

/* ---------- Tarjeta ---------- */
.caso {
  display: block;
  color: inherit;
  text-decoration: none;
  background: var(--casos-card);
  border: 1px solid var(--casos-line);
  overflow: hidden;
  transition: border-color .3s ease, transform .3s ease;
}
.caso:hover,
.caso:focus-visible {
  border-color: rgba(179, 236, 230, 0.4);
  transform: translateY(-2px);
}
.caso:focus-visible { outline: 2px solid var(--casos-accent); outline-offset: 3px; }

/* Tira de 3 imágenes con cortes diagonales */
.caso__media {
  display: flex;
  height: clamp(150px, 16vw, 190px);
  background: var(--casos-divider);   /* se ve como la línea entre paneles */
  overflow: hidden;
}
.caso__panel {
  flex: 1 1 0;
  min-width: 0;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #1b2a36, #0f1a23);  /* respaldo si falta la imagen */
}
.caso__panel + .caso__panel {
  margin-left: calc(var(--casos-gap) - var(--casos-slant));
}
.caso__panel:first-child {
  clip-path: polygon(0 0, 100% 0, calc(100% - var(--casos-slant)) 100%, 0 100%);
}
.caso__panel:not(:first-child):not(:last-child) {
  clip-path: polygon(var(--casos-slant) 0, 100% 0, calc(100% - var(--casos-slant)) 100%, 0 100%);
}
.caso__panel:last-child {
  clip-path: polygon(var(--casos-slant) 0, 100% 0, 100% 100%, 0 100%);
}
.caso__panel img,
.caso__panel video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .8s cubic-bezier(.2,.7,.2,1);
}
.caso:hover .caso__panel img,
.caso:hover .caso__panel video { transform: scale(1.06); }

/* Texto */
.caso__body {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 4px 24px;
  padding: 20px clamp(18px, 3vw, 34px) 22px;
  border-top: 1px solid var(--casos-line);
}
.caso__cat {
  grid-column: 1;
  margin: 0;
  color: var(--casos-accent);
  font-weight: 600;
  font-size: clamp(12px, 1.3vw, 17px);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.caso__title {
  grid-column: 1;
  margin: 2px 0 4px;
  color: var(--casos-aqua);
  font-weight: 800;
  font-size: clamp(21px, 2.9vw, 36px);
  line-height: 1.12;
  letter-spacing: -0.02em;
}
.caso__desc {
  grid-column: 1;
  margin: 0;
  max-width: 44ch;
  color: var(--casos-muted);
  font-weight: 400;
  font-size: clamp(15px, 1.75vw, 21px);
  line-height: 1.35;
}
.caso__arrow {
  grid-column: 2;
  grid-row: 1 / span 3;
  align-self: end;
  width: clamp(44px, 4.8vw, 58px);
  height: clamp(44px, 4.8vw, 58px);
  border: 2px solid var(--casos-text);
  border-radius: 50%;
  display: grid;
  place-items: center;
  transition: background .3s ease, border-color .3s ease, transform .3s ease;
}
.caso__arrow svg { width: 45%; height: 45%; }
.caso:hover .caso__arrow,
.caso:focus-visible .caso__arrow {
  background: var(--casos-accent);
  border-color: var(--casos-accent);
  transform: translateX(4px);
}

/* Leyenda final */
.casos__note {
  max-width: 1130px;
  margin: 34px auto 0;
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--casos-muted);
  font-weight: 300;
  font-size: clamp(15px, 1.6vw, 19px);
  line-height: 1.4;
}
.casos__note::before {
  content: "";
  flex: 0 0 40px;
  height: 1px;
  background: var(--casos-aqua);
}

/* ---------- CTA "VER MÁS CASOS" (mismo estilo que "CÓMO LO HACEMOS") ---------- */
.casos__more {
  max-width: 1130px;
  margin: 34px auto 0;
  display: flex;
  justify-content: center;
}
.casos__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1.75rem;
  background: var(--coral, #EB455D);
  color: var(--hueso, #F1F0F0);
  font-family: inherit;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  border-radius: 999px;
  transition: opacity .2s, transform .2s;
}
.casos__cta:hover { opacity: .88; transform: translateY(-1px); }
.casos__cta:focus-visible { outline: 2px solid var(--casos-aqua); outline-offset: 3px; }

/* ---------- Página casos.html ---------- */
.casos-page { margin: 0; background: var(--petro-galopante, #09121C); }
.casos-page .casos__header { padding-top: clamp(110px, 14vw, 170px); }
.casos-page .casos__note { justify-content: center; }

/* Móvil */
@media (max-width: 640px) {
  .casos { --casos-slant: 30px; --casos-gap: 5px; }
  .caso__media { height: 130px; }
  .caso__body { grid-template-columns: 1fr; }
  .caso__arrow { grid-column: 1; grid-row: auto; justify-self: end; margin-top: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .caso, .caso__panel img, .caso__panel video, .caso__arrow { transition: none; }
  .caso:hover { transform: none; }
  .caso:hover .caso__panel img { transform: none; }
}