/* Error 404: God Not Found — series page */

/* Page background */
.page.error404-series-page::before{
  background-image:url("covers/error-404-thumb.webp");
  filter:brightness(.48) contrast(1.08) saturate(.78) blur(1.2px);
}

/* Slightly calmer overlay for the warm/cold Error404 image */
.page.error404-series-page::after{
  background:
    linear-gradient(90deg,
      rgba(11,11,13,0.92) 0%,
      rgba(11,11,13,0.76) 32%,
      rgba(11,11,13,0.50) 60%,
      rgba(11,11,13,0.24) 82%,
      rgba(11,11,13,0.10) 100%),
    radial-gradient(70% 80% at 62% 45%,
      rgba(210,150,80,0.07) 0%,
      rgba(210,150,80,0.00) 70%);
}

/* Series description */
.series-desc{
  font-size:13px;
  line-height:1.25;
  color:var(--muted);
  max-width:78ch;
}

.series-desc p{
  margin:0 0 12px;
  line-height:1.25;
}

.series-desc p:last-child{
  margin-bottom:0;
}

/* Quote / signal line */
.quote-line{
  font-family:Georgia,'Times New Roman',serif;
  font-size:22px;
  line-height:1.35;
  color:var(--fg);
}

.error404-formula{
  margin:0 0 12px;
  font-family:Georgia,'Times New Roman',serif;
  color:var(--fg);
}

.error404-formula-main{
  display:block;
  font-size:18px;
  line-height:1.25;
}

.error404-formula-sub{
  display:block;
  margin-top:8px;
  font-size:14px;
  line-height:1.25;
  color:rgba(242,242,244,.86);
}

/* Technical / institutional small note */
.protocol{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color:var(--muted);
  font-size:12px;
  letter-spacing:.04em;
}

/* Book cards grid */
.series-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:14px;
  margin-top:14px;
}

/* Book card */
.series-card{
  border:1px solid rgba(242,242,244,.08);
  border-radius:16px;
  padding:14px;
  background:rgba(0,0,0,.18);
  backdrop-filter:blur(4px);
  box-shadow:0 12px 30px rgba(0,0,0,.16);
  display:flex;
  flex-direction:column;
}

/* Cover block */
.series-cover{
  aspect-ratio:2/3;
  border-radius:12px;
  overflow:hidden;
  border:1px solid rgba(242,242,244,.08);
  background:rgba(255,255,255,.035);
  margin-bottom:14px;
}

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

/* Placeholder cover, like GAS on MONOLITH page, but quieter */
.series-cover.placeholder{
  display:flex;
  align-items:center;
  justify-content:center;
  padding:18px;
  font-family:Georgia,'Times New Roman',serif;
  font-size:22px;
  line-height:1.25;
  text-align:center;
  letter-spacing:.06em;
  color:rgba(242,242,244,.56);
  background:
    linear-gradient(145deg,rgba(255,255,255,.04),rgba(255,255,255,.012)),
    rgba(0,0,0,.16);
}

/* Card typography */
.series-card h3{
  margin:0 0 8px;
  font-size:17px;
  line-height:1.3;
}

.series-card p{
  margin:0 0 12px;
  color:var(--muted);
  font-size:13px;
  line-height:1.6;
}

.series-card .cta-row{
  margin-top:auto;
}

.series-card .btn{
  font-size:12px;
  padding:10px 14px;
  font-weight:700;
}

/* Mobile */
@media(max-width:900px){
  .series-grid{
    grid-template-columns:1fr;
  }

  .series-cover{
    max-width:320px;
  }
}