/* ============================================================
   ATLAS CHILE — .sv-bridge: marcador de ruta entre secciones
   "el suelo empieza a cambiar bajo tus pies"

   Uso:
     <div class="sv-bridge" style="--bridge-ac:#9aa6e8"
          data-dest="servicios" data-dest-idx="01">
       <div class="svb-inner">
         <div class="svb-meta">
           <span class="svb-eyebrow">Siguiente en la ruta</span>
           <span class="svb-dest-name">Servicios</span>
           <span class="svb-place">Santiago, Región Metropolitana</span>
         </div>
         <p class="svb-hook">Proyectos que cruzan el horizonte de lo posible.</p>
         <button class="svb-cta" onclick="...">
           Continuar <span class="svb-arr">→</span>
         </button>
       </div>
     </div>

   Variante par (dos destinos):
     <div class="sv-bridge sv-bridge-pair">
       <div class="svb-half" style="--bridge-ac:#9aa6e8">…</div>
       <div class="svb-half" style="--bridge-ac:#8fd4e8">…</div>
     </div>
   ============================================================ */

/* ---- tokens propios del bridge ---- */
.sv-bridge,
.sv-bridge-pair {
  --bridge-ac:    var(--gold);          /* color acento destino — se sobreescribe por sección */
  --bridge-ac-dim: color-mix(in srgb, var(--bridge-ac) 18%, transparent);
  --bridge-ac-mid: color-mix(in srgb, var(--bridge-ac) 35%, transparent);
  --bridge-ac-line: color-mix(in srgb, var(--bridge-ac) 28%, transparent);
  --bridge-glow:  color-mix(in srgb, var(--bridge-ac) 12%, transparent);
  --bridge-r:     6px;
  --bridge-t:     .55s;
}

/* ---- contenedor raíz ---- */
.sv-bridge {
  position: relative;
  width: 100%;
  /* el bridge cierra el sv-body — margin negativo absorbe el gap residual */
  margin-top: clamp(48px, 7vh, 88px);
  /* tierra que se desplaza: la línea topográfica inferior */
  padding-bottom: clamp(28px, 4vw, 40px);
}

/* línea "horizonte" superior — el límite del territorio actual */
.sv-bridge::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--bridge-ac-line) 18%,
    var(--bridge-ac-line) 82%,
    transparent 100%
  );
  transition: background var(--bridge-t) var(--cinema);
}

/* punto de referencia de ruta — coordenada izquierda */
.sv-bridge::after {
  content: '';
  position: absolute;
  top: -1px; left: 0;
  width: 32px; height: 1px;
  background: var(--bridge-ac);
  transition: width var(--bridge-t) var(--cinema), background var(--bridge-t);
}

/* ---- tarjeta ---- */
.svb-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  grid-template-areas:
    "meta  cta"
    "hook  cta";
  column-gap: clamp(24px, 4vw, 48px);
  row-gap: 10px;
  align-items: center;

  padding: clamp(20px, 3vw, 28px) clamp(22px, 3.5vw, 32px);
  /* acento del gradiente subido (6→9% / 3→5%) para compensar el saturate
     eliminado; blur 18→10px: el costo GPU del blur crece al cuadrado del
     radio y esta tarjeta es de ancho completo sobre fondo en movimiento */
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--bridge-ac) 9%, rgba(7,11,22,.78)) 0%,
    rgba(7,11,22,.68) 60%,
    color-mix(in srgb, var(--bridge-ac) 5%, rgba(4,6,12,.72)) 100%
  );
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);

  border: 1px solid var(--bridge-ac-line);
  border-radius: var(--bridge-r);

  /* margen izquierdo — la franja de acento */
  border-left: 2px solid var(--bridge-ac);

  /* sombra base tenue */
  box-shadow:
    0 0 0 1px rgba(0,0,0,.5),
    0 8px 32px -12px rgba(0,0,0,.6),
    inset 0 1px 0 rgba(255,255,255,.04);

  overflow: hidden;
  transition:
    transform var(--bridge-t) var(--cinema),
    box-shadow var(--bridge-t) var(--cinema),
    border-color var(--bridge-t),
    background var(--bridge-t) var(--cinema);
}

/* ---- ruido topográfico de fondo (contornos sutiles) ---- */
.svb-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      180deg,
      transparent 0px,
      transparent 11px,
      rgba(255,255,255,.014) 12px
    );
  pointer-events: none;
  border-radius: inherit;
}

/* ---- pulso de acento en esquina (indicador de destino) ---- */
.svb-inner::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 140px; height: 140px;
  background: radial-gradient(
    ellipse at 100% 0%,
    var(--bridge-glow) 0%,
    transparent 70%
  );
  pointer-events: none;
  transition: opacity var(--bridge-t) var(--cinema);
  opacity: .7;
}

/* ============================================================
   ESTADOS HOVER
   ============================================================ */
.sv-bridge:hover .svb-inner,
.svb-half:hover .svb-inner {
  transform: translateY(-3px);
  border-color: var(--bridge-ac-mid);
  border-left-color: var(--bridge-ac);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--bridge-ac) 10%, rgba(7,11,22,.85)) 0%,
    rgba(7,11,22,.78) 60%,
    color-mix(in srgb, var(--bridge-ac) 5%, rgba(4,6,12,.80)) 100%
  );
  box-shadow:
    0 0 0 1px rgba(0,0,0,.5),
    0 16px 48px -16px rgba(0,0,0,.7),
    0 0 0 1px var(--bridge-ac-line),
    0 0 28px -8px var(--bridge-glow),
    inset 0 1px 0 rgba(255,255,255,.06);
}

.sv-bridge:hover .svb-inner::after,
.svb-half:hover .svb-inner::after {
  opacity: 1;
}

/* hover en la línea horizonte */
.sv-bridge:hover::before {
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--bridge-ac-mid) 12%,
    color-mix(in srgb, var(--bridge-ac) 50%, transparent) 50%,
    var(--bridge-ac-mid) 88%,
    transparent 100%
  );
}

.sv-bridge:hover::after {
  width: 56px;
}

/* ============================================================
   SECCIONES DE CONTENIDO
   ============================================================ */

/* — META: eyebrow + nombre destino + lugar — */
.svb-meta {
  grid-area: meta;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.svb-eyebrow {
  font-family: var(--f-mono);
  font-size: .56rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--bridge-ac);
  opacity: .75;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* triángulo marcador de ruta */
.svb-eyebrow::before {
  content: '';
  display: inline-block;
  width: 0; height: 0;
  border-style: solid;
  border-width: 4px 0 4px 6px;
  border-color: transparent transparent transparent var(--bridge-ac);
  flex-shrink: 0;
  opacity: .7;
}

.svb-dest-name {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 2.2vw, 1.55rem);
  letter-spacing: -.025em;
  color: var(--paper);
  line-height: 1;
  transition: color var(--bridge-t);
}

.sv-bridge:hover .svb-dest-name,
.svb-half:hover .svb-dest-name {
  color: color-mix(in srgb, var(--bridge-ac) 30%, var(--paper));
}

.svb-place {
  font-family: var(--f-mono);
  font-size: .6rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--paper-mut);
  opacity: .7;
  margin-top: 2px;
}

/* — HOOK: texto de anclaje — */
.svb-hook {
  grid-area: hook;
  font-family: var(--f-serif);
  font-style: italic;
  font-size: clamp(.88rem, 1.1vw, .98rem);
  line-height: 1.52;
  color: var(--paper-dim);
  max-width: 52ch;
  text-wrap: pretty;
  transition: color var(--bridge-t);
}

.sv-bridge:hover .svb-hook,
.svb-half:hover .svb-hook {
  color: var(--paper-mut);
}

/* — CTA: botón de ruta — */
.svb-cta {
  grid-area: cta;
  grid-row: 1 / 3;

  display: inline-flex;
  align-items: center;
  gap: 10px;
  align-self: center;

  padding: 11px clamp(16px, 2.5vw, 22px);
  font-family: var(--f-mono);
  font-size: .66rem;
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--bridge-ac);
  white-space: nowrap;

  background: var(--bridge-ac-dim);
  border: 1px solid var(--bridge-ac-line);
  border-radius: 4px;

  cursor: pointer;
  position: relative;
  overflow: hidden;

  transition:
    background var(--bridge-t) var(--cinema),
    border-color var(--bridge-t),
    color var(--bridge-t),
    transform var(--bridge-t) var(--cinema),
    box-shadow var(--bridge-t) var(--cinema);
}

/* barrido de relleno en hover */
.svb-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--bridge-ac);
  transform: translateX(-101%);
  transition: transform var(--bridge-t) var(--cinema);
}

.svb-cta:hover {
  color: var(--void);
  border-color: var(--bridge-ac);
  box-shadow: 0 0 20px -4px var(--bridge-glow);
}

.svb-cta:hover::before {
  transform: translateX(0);
}

/* el texto flota sobre el barrido */
.svb-cta-label,
.svb-arr {
  position: relative;
  z-index: 1;
}

.svb-arr {
  display: inline-block;
  transition: transform var(--bridge-t) var(--cinema);
}

.svb-cta:hover .svb-arr {
  transform: translateX(4px);
}

/* foco accesible */
.svb-cta:focus-visible {
  outline: 2px solid var(--bridge-ac);
  outline-offset: 3px;
}

/* ============================================================
   ÍNDICE DE SECCIÓN — número de ruta (opcional, top-right)
   ============================================================ */
.svb-idx {
  position: absolute;
  top: clamp(16px, 2vw, 22px);
  right: clamp(16px, 2.5vw, 26px);
  font-family: var(--f-mono);
  font-size: .6rem;
  letter-spacing: .14em;
  color: var(--bridge-ac);
  opacity: .35;
  transition: opacity var(--bridge-t);
  pointer-events: none;
}

.sv-bridge:hover .svb-idx,
.svb-half:hover .svb-idx {
  opacity: .6;
}

/* ============================================================
   VARIANTE PAR — dos destinos lado a lado
   ============================================================ */
.sv-bridge-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  /* hereda el mismo ::before/::after que .sv-bridge no, porque
     .sv-bridge-pair reemplaza al wrapper; cada half tiene su propio acento */
}

/* cada mitad es un bridge independiente */
.svb-half {
  position: relative;
  cursor: pointer;
  /* línea de horizonte propia */
}

.svb-half::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    var(--bridge-ac-line) 0%,
    transparent 100%
  );
  transition: background var(--bridge-t) var(--cinema);
}

.svb-half:hover::before {
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--bridge-ac) 50%, transparent) 0%,
    var(--bridge-ac-line) 70%,
    transparent 100%
  );
}

/* en el par, el CTA se compacta y el layout es vertical */
.svb-half .svb-inner {
  grid-template-columns: 1fr;
  grid-template-rows: auto auto auto;
  grid-template-areas:
    "meta"
    "hook"
    "cta";
  row-gap: 12px;
  height: 100%;
}

.svb-half .svb-cta {
  grid-row: auto;
  align-self: flex-start;
  justify-self: flex-start;
  width: fit-content;
}

/* separador vertical entre los dos halfs */
.sv-bridge-pair::after {
  content: '';
  display: none; /* se activa solo si se quiere — ver variante con separador */
}

.sv-bridge-pair.with-sep {
  position: relative;
}

.sv-bridge-pair.with-sep::after {
  display: block;
  position: absolute;
  top: 14px; bottom: 14px;
  left: calc(50% - 1px);
  width: 1px;
  background: linear-gradient(
    180deg,
    transparent 0%,
    var(--line) 25%,
    var(--line) 75%,
    transparent 100%
  );
  pointer-events: none;
  z-index: 2;
}

/* ============================================================
   REVELADO (integración con sistema .rv del atlas)
   ============================================================ */
.sv-bridge.rv,
.sv-bridge-pair.rv {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .9s var(--cinema), transform .9s var(--cinema);
}

.sv-bridge.rv.in,
.sv-bridge-pair.rv.in {
  opacity: 1;
  transform: none;
}

/* los halfs se revelan con stagger */
.sv-bridge-pair.rv.in .svb-half:nth-child(2) .svb-inner {
  transition-delay: .08s;
}

/* ============================================================
   RESPONSIVE — mobile
   ============================================================ */
@media (max-width: 680px) {
  /* bridge simple: stack vertical */
  .svb-inner {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    grid-template-areas:
      "meta"
      "hook"
      "cta";
    row-gap: 14px;
  }

  .svb-cta {
    grid-row: auto;
    align-self: flex-start;
    justify-self: flex-start;
    width: fit-content;
  }

  /* bridge par: apilado vertical */
  .sv-bridge-pair {
    grid-template-columns: 1fr;
  }

  .sv-bridge-pair.with-sep::after {
    display: none;
  }

  .svb-half .svb-inner {
    /* ya es columna, no cambia */
  }
}

@media (max-width: 480px) {
  .svb-dest-name {
    font-size: 1.2rem;
  }

  .svb-inner {
    padding: 18px 18px;
  }

  .svb-cta {
    padding: 10px 16px;
  }
}

/* ============================================================
   PREFERENCIAS DE MOVIMIENTO
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .svb-inner,
  .svb-cta,
  .svb-cta::before,
  .svb-arr,
  .svb-inner::after,
  .sv-bridge::after,
  .sv-bridge-pair .svb-half::before {
    transition: none !important;
  }
}