* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #121212;
  background: #f6f7f9;
  line-height: 1.65;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e7e7e7;
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

.brand,
.back-link {
  color: #111;
  text-decoration: none;
  font-weight: 600;
}

.back-link:hover {
  text-decoration: underline;
}

.hero {
  padding: 56px 0 28px;
}

.eyebrow {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #5a5a5a;
  margin-bottom: 12px;
}

.title {
  font-size: clamp(1.7rem, 3vw, 2.65rem);
  line-height: 1.2;
  margin-bottom: 22px;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.cta {
  display: inline-block;
  text-decoration: none;
  background: #111;
  color: #fff;
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  font-family: inherit;
}

.cta:hover {
  background: #333;
}

.cta-soon {
  background: #9ca3af;
  color: #f3f4f6;
  opacity: 1;
  cursor: not-allowed;
  user-select: none;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}

.cta-live {
  background: #b91c1c;
  color: #fff;
}

.cta-live:hover {
  background: #991b1b;
  color: #fff;
}

.card {
  background: #fff;
  border: 1px solid #e9e9e9;
  border-radius: 18px;
  padding: 30px;
  margin-bottom: 20px;
  box-shadow: 0 8px 30px rgba(17, 17, 17, 0.04);
}

.card h2 {
  margin-bottom: 14px;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
}

.card p {
  margin-bottom: 14px;
}

.authors {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
}

.author-card {
  border: 1px solid #ededed;
  border-radius: 14px;
  padding: 20px;
  background: #fcfcfc;
}

.author-photo {
  width: 100%;
  max-width: 260px;
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  object-fit: cover;
  display: block;
  margin-bottom: 14px;
  background: #ddd;
}

.author-photo.placeholder {
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 700;
  font-size: 2rem;
  background: linear-gradient(145deg, #60646d, #272a31);
}

.author-card h3 {
  margin-bottom: 8px;
}

.author-card a {
  color: #1e3a8a;
  text-decoration: none;
}

.author-card a:hover {
  text-decoration: underline;
}

figure {
  margin-bottom: 14px;
}

.diagram {
  width: 100%;
  border-radius: 10px;
  border: 1px solid #ddd;
  background: #fff;
}

figcaption {
  margin-top: 10px;
  color: #565656;
  font-size: 0.95rem;
}

@media (max-width: 680px) {
  .header .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .card {
    padding: 22px;
  }
}