/* Shared Eterna Femme research-note system. */

.proto-hero,
.klow-hero,
.ksci-hero,
.reta-hero {
  min-height: 52vh;
  display: flex;
  align-items: center;
  padding: 132px 0 88px;
  background:
    radial-gradient(circle at 84% 18%, rgba(196, 168, 154, 0.22), transparent 32%),
    var(--color-bg);
}

.proto-hero .container,
.klow-hero .container,
.ksci-hero .container,
.reta-hero .container {
  width: 100%;
}

.proto-hero h1,
.klow-hero h1,
.ksci-hero h1,
.reta-hero h1 {
  max-width: 780px;
  margin-bottom: 1.5rem;
  font-size: clamp(2.7rem, 6vw, 5rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

.proto-hero h1 em,
.klow-hero h1 em,
.ksci-hero h1 em,
.reta-hero h1 em {
  color: var(--color-accent);
  font-weight: 400;
}

.proto-hero-lead,
.klow-hero-lead,
.ksci-hero > .container > p:last-child,
.reta-hero-lead {
  max-width: 650px;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.75;
  color: var(--color-text-secondary);
}

.proto-hero-note {
  margin-top: 1.4rem;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.proto-content,
.klow-content,
.reta-content,
.ksci-content {
  padding: var(--section-padding) 0;
  background: var(--color-surface);
}

.proto-content:nth-of-type(odd),
.klow-content:nth-of-type(odd),
.reta-content:nth-of-type(odd),
.ksci-content:nth-of-type(odd) {
  background: var(--color-bg);
}

.proto-content-inner,
.reta-content > .container,
.ksci-content > .container {
  max-width: 760px;
  margin: 0 auto;
}

.proto-content h2,
.reta-content h2,
.ksci-content h2 {
  max-width: 20ch;
  margin-bottom: 1.25rem;
  font-size: clamp(1.9rem, 3.5vw, 2.8rem);
  line-height: 1.12;
}

.proto-content p,
.reta-content p,
.ksci-content p {
  max-width: 68ch;
  margin-bottom: 1.25rem;
  font-size: 1rem;
  line-height: 1.85;
}

.proto-content p:last-child,
.reta-content p:last-child,
.ksci-content p:last-child {
  margin-bottom: 0;
}

.proto-content a,
.reta-content a,
.ksci-content a,
.proto-safety a {
  color: var(--color-accent);
  font-weight: 600;
  border-bottom: 1px solid rgba(139, 94, 107, 0.35);
}

.proto-safety,
.ksci-guardrails {
  padding: var(--section-padding) 0;
  background: #f0e9e4;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.proto-safety-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.proto-safety-text h2,
.ksci-guardrails h2 {
  margin-bottom: 1.25rem;
}

.proto-safety-list,
.ksci-guardrails ul {
  display: grid;
  gap: 0.9rem;
  padding-left: 1.15rem;
}

.proto-safety-list li,
.ksci-guardrails li {
  padding-left: 0.25rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.proto-content .btn-primary,
.reta-content .btn-primary,
.ksci-content .btn-primary {
  margin-top: 0.5rem;
}

.ksci-guardrails > .container {
  max-width: 760px;
  margin: 0 auto;
}

.ksci-guardrails p {
  margin-top: 1.75rem;
}

@media (max-width: 700px) {
  .proto-hero,
  .klow-hero,
  .ksci-hero,
  .reta-hero {
    min-height: auto;
    padding: 112px 0 64px;
  }

  .proto-hero h1,
  .klow-hero h1,
  .ksci-hero h1,
  .reta-hero h1 {
    font-size: clamp(2.4rem, 13vw, 3.7rem);
  }

  .proto-safety-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}