:root {
      --bg: #0b1020;
      --bg-soft: #111936;
      --card: #151f3f;
      --text: #edf2ff;
      --muted: #aeb9d8;
      --accent: #7dd3fc;
      --accent-2: #c084fc;
      --border: rgba(255, 255, 255, 0.12);
      --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }

    body {
      font-family: Arial, Helvetica, sans-serif;
      background:
        radial-gradient(circle at top left, rgba(125, 211, 252, 0.22), transparent 32%),
        radial-gradient(circle at top right, rgba(192, 132, 252, 0.18), transparent 30%),
        var(--bg);
      color: var(--text);
      line-height: 1.6;
    }

    a { color: inherit; text-decoration: none; }

    .container { width: min(1120px, 92%); margin: 0 auto; }

    header {
      position: sticky;
      top: 0;
      z-index: 20;
      backdrop-filter: blur(16px);
      background: rgba(11, 16, 32, 0.78);
      border-bottom: 1px solid var(--border);
    }
    .nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 0;
    }
    .logo {
      display: flex;
      gap: 10px;
      align-items: center;
      font-weight: 800;
      letter-spacing: -0.03em;
    }
    .logo-mark {
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border: 1px solid var(--border);
      border-radius: 12px;
      background: linear-gradient(135deg, var(--accent), var(--accent-2));
      color: #06111f;
      font-weight: 900;
    }
    .nav-links {
      display: flex;
      gap: 22px;
      color: var(--muted);
      font-size: 0.95rem;
    }
    .nav-links a:hover { color: var(--text); }

    .hero { padding: 92px 0 70px; }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 12px;
      margin-bottom: 22px;
      border: 1px solid var(--border);
      border-radius: 999px;
      color: var(--muted);
      background: rgba(255, 255, 255, 0.05);
      font-size: 0.9rem;
    }
    .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 18px var(--accent);
    }

    h1 {
      max-width: 820px;
      font-size: clamp(2.6rem, 7vw, 5.5rem);
      line-height: 0.98;
      letter-spacing: -0.075em;
      margin-bottom: 24px;
    }
    .gradient-text {
      background: linear-gradient(90deg, var(--accent), var(--accent-2));
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .hero p {
      max-width: 680px;
      color: var(--muted);
      font-size: 1.18rem;
      margin-bottom: 28px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 18px;
      border-radius: 14px;
      border: 1px solid var(--border);
      font-weight: 700;
      transition: transform 0.2s ease, border 0.2s ease, background 0.2s ease;
    }
    .btn:hover { transform: translateY(-2px); }
    .btn-primary {
      color: #071120;
      background: linear-gradient(135deg, var(--accent), var(--accent-2));
      border: none;
    }
    .btn-secondary {
      color: var(--text);
      background: rgba(255, 255, 255, 0.06);
    }

    .hero-card {
      padding: 24px;
      border: 1px solid var(--border);
      border-radius: 28px;
      background: rgba(21, 31, 63, 0.78);
      box-shadow: var(--shadow);
    }
    .hero-card h2 { font-size: 1.25rem; margin-bottom: 16px; }
    .question-list {
      display: grid;
      gap: 14px;
      list-style: none;
    }
    .question-list li {
      padding: 14px;
      border: 1px solid var(--border);
      border-radius: 16px;
      color: var(--muted);
      background: rgba(255, 255, 255, 0.04);
    }

    section { padding: 70px 0; }
    .section-head { max-width: 720px; margin-bottom: 32px; }
    .section-head h2 {
      font-size: clamp(2rem, 4vw, 3rem);
      line-height: 1.05;
      letter-spacing: -0.05em;
      margin-bottom: 14px;
    }
    .section-head p {
      color: var(--muted);
      font-size: 1.05rem;
    }

    .cards {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }
    .card {
      padding: 22px;
      min-height: 210px;
      border: 1px solid var(--border);
      border-radius: 24px;
      background: rgba(255, 255, 255, 0.055);
    }
    .card .icon {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      margin-bottom: 18px;
      border-radius: 14px;
      background: rgba(125, 211, 252, 0.14);
      border: 1px solid var(--border);
      font-size: 1.2rem;
    }
    .card h3 { margin-bottom: 10px; font-size: 1.15rem; }
    .card p { color: var(--muted); font-size: 0.98rem; }

    .issue-list { display: grid; gap: 16px; }
    .issue {
      display: grid;
      grid-template-columns: 150px 1fr auto;
      gap: 18px;
      align-items: center;
      padding: 20px;
      border: 1px solid var(--border);
      border-radius: 22px;
      background: rgba(255, 255, 255, 0.05);
    }
    .issue-date {
      color: var(--accent);
      font-weight: 800;
      font-size: 0.92rem;
    }
    .issue h3 { margin-bottom: 4px; }
    .issue p { color: var(--muted); font-size: 0.96rem; }
    .tag {
      white-space: nowrap;
      color: var(--muted);
      border: 1px solid var(--border);
      border-radius: 999px;
      padding: 7px 10px;
      font-size: 0.82rem;
      background: rgba(255, 255, 255, 0.04);
    }

    .subscribe {
      padding: 34px;
      border: 1px solid var(--border);
      border-radius: 30px;
      background:
        linear-gradient(135deg, rgba(125, 211, 252, 0.16), rgba(192, 132, 252, 0.12)),
        rgba(255, 255, 255, 0.05);
      box-shadow: var(--shadow);
    }
    .subscribe-grid {
      display: grid;
      grid-template-columns: 1fr 420px;
      gap: 28px;
      align-items: center;
    }
    .subscribe h2 {
      font-size: clamp(2rem, 4vw, 3rem);
      letter-spacing: -0.05em;
      line-height: 1.05;
      margin-bottom: 12px;
    }
    .subscribe p { color: var(--muted); }

    form {
      display: flex;
      gap: 10px;
      padding: 8px;
      border: 1px solid var(--border);
      border-radius: 18px;
      background: rgba(11, 16, 32, 0.68);
    }
    input[type="email"] {
      width: 100%;
      border: none;
      outline: none;
      background: transparent;
      color: var(--text);
      padding: 0 10px;
      font-size: 1rem;
    }
    input::placeholder { color: #7f8aaa; }
    button { border: none; cursor: pointer; white-space: nowrap; }

    footer {
      padding: 40px 0;
      color: var(--muted);
      border-top: 1px solid var(--border);
      font-size: 0.95rem;
    }
    .footer-grid {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      flex-wrap: wrap;
    }

    .sr-only {
      position: absolute;
      width: 1px; height: 1px;
      padding: 0; margin: -1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      white-space: nowrap;
      border: 0;
    }

    @media (max-width: 1100px) {
      .cards { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 850px) {
      .hero-grid,
      .subscribe-grid { grid-template-columns: 1fr; }
      .cards { grid-template-columns: 1fr; }
      .issue { grid-template-columns: 1fr; }
      .nav-links { display: none; }
      form { flex-direction: column; }
      input[type="email"] { padding: 12px 10px; }
    }

/* ─────────────────────────────────────────────────────────────────────
   Article pages — issue posts + paper landing pages
   Used by newsletter/issues/*.html and newsletter/papers/*.html
   ───────────────────────────────────────────────────────────────────── */

.article {
  max-width: 720px;
  margin: 0 auto;
  padding: 60px 0 80px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 0.92rem;
}
.back-link:hover { color: var(--text); }

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}
.article-meta .tag {
  font-size: 0.78rem;
  padding: 5px 10px;
}

.article h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  letter-spacing: -0.045em;
  line-height: 1.04;
  margin-bottom: 18px;
}

.article .dek {
  color: var(--muted);
  font-size: 1.18rem;
  line-height: 1.55;
  margin-bottom: 32px;
}

.article h2 {
  margin: 44px 0 14px;
  font-size: 1.5rem;
  letter-spacing: -0.025em;
}

.article h3 {
  margin: 32px 0 10px;
  font-size: 1.2rem;
}

.article p {
  margin: 0 0 18px;
  font-size: 1.04rem;
  line-height: 1.7;
  color: #d8dff5;
}

.article ul,
.article ol {
  margin: 0 0 20px 22px;
  color: #d8dff5;
}
.article li { margin-bottom: 8px; line-height: 1.6; }

.article a {
  color: var(--accent);
  border-bottom: 1px solid rgba(125, 211, 252, 0.35);
}
.article a:hover {
  color: var(--accent-2);
  border-bottom-color: var(--accent-2);
}

.article blockquote {
  margin: 24px 0;
  padding: 14px 18px;
  border-left: 3px solid var(--accent);
  background: rgba(125, 211, 252, 0.08);
  border-radius: 0 12px 12px 0;
  color: var(--text);
  font-style: italic;
}

.article code {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.92em;
  background: rgba(255, 255, 255, 0.07);
  padding: 1px 6px;
  border-radius: 4px;
}

.article pre {
  margin: 22px 0;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(11, 16, 32, 0.7);
  overflow-x: auto;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.55;
}
.article pre code {
  background: transparent;
  padding: 0;
  font-size: inherit;
}

.article hr {
  margin: 40px 0;
  border: none;
  border-top: 1px solid var(--border);
}

.article-footer {
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  display: grid;
  gap: 22px;
}
.article-footer .prev-next {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ─── Paper-landing-specific bits ─────────────────────────────────────── */

.paper-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.paper-status.working {
  background: rgba(125, 211, 252, 0.16);
  color: var(--accent);
  border: 1px solid rgba(125, 211, 252, 0.4);
}
.paper-status.in-review {
  background: rgba(192, 132, 252, 0.14);
  color: var(--accent-2);
  border: 1px solid rgba(192, 132, 252, 0.4);
}
.paper-status.drafting {
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
  border: 1px solid var(--border);
}

.paper-authors {
  color: var(--muted);
  font-size: 0.98rem;
  margin-bottom: 24px;
}

.paper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 36px;
}

.abstract {
  padding: 22px 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
  margin-bottom: 32px;
}
.abstract h2 {
  margin: 0 0 12px;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}
.abstract p {
  margin: 0;
  font-size: 1.02rem;
}

details.bibtex {
  margin: 28px 0;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
}
details.bibtex summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--accent);
  user-select: none;
}
details.bibtex pre {
  margin: 14px 0 0;
  border: none;
  padding: 0;
  background: transparent;
}