:root {
      --bg: #05070b;
      --panel: rgba(255,255,255,0.04);
      --panel-2: rgba(255,255,255,0.03);
      --ink: #edf2f7;
      --muted: #b8c1cc;
      --soft: #8d98a7;
      --line: rgba(255,255,255,0.10);
      --link: #9ec8ff;
      --link-hover: #c7dfff;
      --btn-bg: #edf2f7;
      --btn-ink: #0c1117;
      --btn-alt-bg: transparent;
      --btn-alt-ink: #edf2f7;
      --glow: 0 0 60px rgba(255,255,255,0.08);
      --max: 1080px;
      --radius: 16px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      min-height: 100%;
      color: var(--ink);
      background:
        radial-gradient(circle at 50% 12%, rgba(180, 210, 255, 0.10), transparent 22%),
        radial-gradient(circle at 50% 0%, rgba(255,255,255,0.06), transparent 12%),
        linear-gradient(180deg, #06080d 0%, #05070b 48%, #070a10 100%);
      font-family: Georgia, Cambria, "Times New Roman", Times, serif;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      background-image:
        radial-gradient(circle at 12% 18%, rgba(255,255,255,0.9) 0 1px, transparent 1.5px),
        radial-gradient(circle at 78% 14%, rgba(255,255,255,0.85) 0 1px, transparent 1.5px),
        radial-gradient(circle at 68% 28%, rgba(255,255,255,0.8) 0 1px, transparent 1.5px),
        radial-gradient(circle at 24% 30%, rgba(255,255,255,0.7) 0 1px, transparent 1.5px),
        radial-gradient(circle at 86% 38%, rgba(255,255,255,0.75) 0 1px, transparent 1.5px),
        radial-gradient(circle at 16% 55%, rgba(255,255,255,0.6) 0 1px, transparent 1.5px),
        radial-gradient(circle at 72% 60%, rgba(255,255,255,0.65) 0 1px, transparent 1.5px),
        radial-gradient(circle at 40% 72%, rgba(255,255,255,0.7) 0 1px, transparent 1.5px),
        radial-gradient(circle at 82% 82%, rgba(255,255,255,0.55) 0 1px, transparent 1.5px),
        radial-gradient(circle at 22% 88%, rgba(255,255,255,0.5) 0 1px, transparent 1.5px);
      opacity: 0.35;
    }

    a {
      color: var(--link);
      text-decoration: none;
    }
    a:hover {
      color: var(--link-hover);
      text-decoration: underline;
    }

    .wrap {
      max-width: var(--max);
      margin: 0 auto;
      padding: 28px 20px 72px;
      position: relative;
      z-index: 1;
    }



    .topbar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      padding: 8px 0 20px;
      color: var(--soft);
      font-family: Arial, Helvetica, sans-serif;
      font-size: 13px;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .nav {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .nav a {
      color: var(--soft);
      text-decoration: none;
    }

.signal-line {
display: flex;
align-items: center;
justify-content: center;
gap: 16px;
width: 100%;
margin: 28px 0 36px;
opacity: 0.8;
}

.signal-line::before,
.signal-line::after {
content: "";
flex: 1 1 auto;
height: 1px;
background: linear-gradient(to right, transparent, var(--line), transparent);
}

.signal-line span {
font-size: 12px;
letter-spacing: 2px;
text-transform: uppercase;
color: var(--muted);
white-space: nowrap;
}

.hero {
display: grid;
grid-template-columns: 1fr;
gap: 28px;
align-items: center;
padding: 34px 0 42px;
border-bottom: 1px solid var(--line);
position: relative;
overflow: hidden;    
}
.hero::after {
  content: "";
  position: absolute;

  width: 820px;
  height: 820px;

  right: -200px;
  top: 50%;
  transform: translateY(-50%);

  background-image: url("0-cover-starfield_hero.png");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;

  opacity: 0.30;
  pointer-events: none;
  z-index: 0;

  border-radius: 50%;

  filter: saturate(1.10);
}
.hero > div {
position: relative;
z-index: 1;
}
.hero-signal {
margin-top: 18px;
font-size: 13px;
letter-spacing: 1.5px;
text-transform: uppercase;
color: var(--muted);
opacity: 0.65;
}

    .eyebrow {
      margin: 0 0 12px;
      color: var(--soft);
      font-family: Arial, Helvetica, sans-serif;
      font-size: 12px;
      letter-spacing: 0.10em;
      text-transform: uppercase;
    }

    h1 {
      margin: 0;
      font-size: clamp(42px, 6vw, 72px);
      line-height: 0.98;
      font-weight: 700;
      letter-spacing: -0.03em;
    }

    .hero p {
      margin: 16px 0 0;
      font-size: 20px;
      color: var(--muted);
      max-width: 32ch;
    }
    .cta-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 22px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 0 16px;
      border-radius: 999px;
      border: 1px solid var(--line);
      text-decoration: none;
      font-family: Arial, Helvetica, sans-serif;
      font-weight: 700;
      font-size: 14px;
      letter-spacing: 0.01em;
      transition: transform 0.08s ease, background 0.2s ease, border-color 0.2s ease;
    }
    .btn:hover {
      text-decoration: none;
      transform: translateY(-1px);
    }

    .btn.primary {
      background: var(--btn-bg);
      color: var(--btn-ink);
    }

    .btn.secondary {
      background: var(--btn-alt-bg);
      color: var(--btn-alt-ink);
    }

    .section {
      padding: 34px 0;
      border-bottom: 1px solid var(--line);
    }

    .section-kicker {
      margin: 0 0 8px;
      color: var(--soft);
      font-family: Arial, Helvetica, sans-serif;
      font-size: 12px;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    h2 {
      margin: 0 0 12px;
      font-size: clamp(28px, 3vw, 40px);
      line-height: 1.1;
    }

    .lede {
      margin: 0;
      max-width: 65ch;
      color: var(--muted);
      font-size: 18px;
    }

    .feature-grid,
    .book-grid,
    .signal-grid {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 24px;
      margin-top: 20px;
    }

    .paper-art {
      border-radius: 24px;
      overflow: hidden;
      border: 1px solid var(--line);
      background: var(--panel);
      box-shadow: var(--glow);
      aspect-ratio: 1 / 1;
      align-self: start;
    }

    .card {
      border: 1px solid var(--line);
      background: var(--panel);
      border-radius: var(--radius);
      padding: 20px;
      backdrop-filter: blur(4px);
    }

    .meta,
    .small {
      font-family: Arial, Helvetica, sans-serif;
      font-size: 13px;
      color: var(--soft);
    }

    .doi {
      word-break: break-word;
      margin-top: 12px;
    }

    .series-grid {
      display: grid;
      grid-template-columns: repeat(5, minmax(0, 1fr));
      gap: 16px;
      margin-top: 22px;
    }

    .series-card {
      display: flex;
      flex-direction: column;
      gap: 12px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 12px;
      background: var(--panel);
      min-height: 100%;
    }

    .series-card .thumb {
      aspect-ratio: 4 / 5;
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid rgba(255,255,255,0.08);
      background: #020305;
    }

    .series-card h3 {
      margin: 0;
      font-size: 18px;
      line-height: 1.2;
    }

    .series-card p {
      margin: 0;
      color: var(--muted);
      font-size: 15px;
    }

    .series-card .links {
      margin-top: auto;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      font-family: Arial, Helvetica, sans-serif;
      font-size: 13px;
    }

    .book-card {
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid var(--line);
      background: var(--panel);
      aspect-ratio: 4 / 5;
      box-shadow: var(--glow);
    }
.paper-art img,
.series-card img,
.book-card img {
width: 100%;
height: 100%;
object-fit: cover;
display: block;
}
    .signal-list {
      display: grid;
      gap: 12px;
    }

    .signal-item {
      padding: 16px 0;
      border-top: 1px solid rgba(255,255,255,0.08);
    }

    .signal-item:first-child {
      border-top: 0;
      padding-top: 0;
    }

    footer {
      padding-top: 28px;
      color: var(--soft);
      font-family: Arial, Helvetica, sans-serif;
      font-size: 13px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px 14px;
    }

    @media (max-width: 780px) {
      .hero,
      .feature-grid,
      .book-grid,
      .signal-grid {
        grid-template-columns: 1fr;
      }

	nav {
		flex-wrap: wrap;
		gap: 8px;
		font-size: 12px;
	}
  }

@media (max-width: 640px) {

/* Layout tightening */
.wrap {
padding-left: 16px;
padding-right: 16px;
}

/* Hero */
.hero {
grid-template-columns: 1fr;
}
.hero::after {
    width: 100%;
    height: 100%;
    inset: 0;
    right: auto;
    top: -12%;
    transform: none;

    opacity: 0.22;
    background-size: cover;
    background-position: 0% center;
    border-radius: 0;
  }
h1 {
font-size: 38px;
}

.hero p,
.lede {
font-size: 17px;
}

/* CTA buttons */
.cta-row {
flex-direction: column;
align-items: flex-start;
}

.cta-row a {
width: 100%;
text-align: center;
}

/* Nav */
nav {
flex-wrap: wrap;
gap: 8px;
font-size: 12px;
}

/* Paper arc (key transformation) */
.series-grid {
grid-template-columns: 1fr;
gap: 12px;
}

.series-card {
display: grid;
grid-template-columns: 80px 1fr;
gap: 12px;
align-items: center;
}

.series-card img {
height: 80px;
width: 80px;
object-fit: cover;
}

.series-card h3 {
font-size: 14px;
margin: 0;
}

.series-card p {
font-size: 12px;
margin: 4px 0 0;
}
}