/* Intro briefing — paper memo, muted, not horror */

body[data-site="intro"] {
  min-height: 100vh;
  background:
    radial-gradient(ellipse at 20% 0%, #2a2e34 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, #1a1c20 0%, transparent 45%),
    #16181c;
  color: #c8c4ba;
  font-family: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
}

.intro-wrap {
  max-width: 34rem;
  margin: 0 auto;
  padding: 3.5rem 1.5rem 4rem;
}

.intro-kicker {
  margin: 0 0 0.75rem;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: none;
  color: #7a756c;
  font-family: -apple-system, "PingFang SC", system-ui, sans-serif;
}

.intro-wrap h1 {
  margin: 0 0 1.75rem;
  font-size: 1.65rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #e6e1d6;
  border-bottom: 1px solid #3a3832;
  padding-bottom: 0.85rem;
}

.intro-body {
  margin-bottom: 2.25rem;
}

.intro-body p {
  margin: 0 0 1rem;
  font-size: 1.02rem;
  line-height: 1.85;
  color: #b8b3a8;
}

.intro-body p:last-child {
  margin-bottom: 0;
  color: #9a958a;
}

.intro-name {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1.25rem;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: #8a857a;
  font-family: -apple-system, "PingFang SC", system-ui, sans-serif;
}

.intro-name input {
  width: 100%;
  max-width: 14rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid #3f3d38;
  border-radius: 4px;
  background: #1e2024;
  color: #e6e1d6;
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s ease;
}

.intro-name input::placeholder {
  color: #5c584f;
}

.intro-name input:focus {
  border-color: #6a6558;
}

.intro-start {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  border: 1px solid #5a564c;
  border-radius: 4px;
  background: #2a2c30;
  color: #e6e1d6;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  font-family: -apple-system, "PingFang SC", system-ui, sans-serif;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.intro-start:hover {
  background: #34363c;
  border-color: #7a7568;
}

.intro-start:active {
  background: #24262a;
}

.intro-start:focus-visible {
  outline: 2px solid #8a857a;
  outline-offset: 2px;
}