:root {
  --orange: #e05b26;
  --orange-dark: #b7461d;
  --blue: #0087cd;
  --ink: #282828;
  --paper: #ffffff;
  --mist: #f4f4f2;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 18px;
  line-height: 1.55;
}
a { color: var(--orange-dark); }
a:hover, a:focus { color: var(--orange); }
button, a { outline-offset: 4px; }

.archive-notice {
  padding: .65rem 1rem;
  color: #fff;
  background: #333;
  text-align: center;
  font-size: .85rem;
}
.site-header { padding: 2.5rem 1rem 2rem; }
.dialog-logo { display: block; width: min(475px, 86vw); height: auto; margin: 0 auto; }
.welcome { margin: 1rem 0 0; font-size: 1.15rem; }

.intro {
  padding: 4rem 0;
  color: #fff;
  background: linear-gradient(125deg, #d85323 0%, var(--orange) 58%, #ef8253 100%);
}
.intro .title {
  margin: 0 0 2rem;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.06;
  font-weight: 700;
}
.intro-copy { text-align: right; }
.buttons { display: flex; flex-direction: column; align-items: flex-end; gap: .85rem; }
.button {
  display: inline-block;
  min-width: 230px;
  padding: .8rem 1.2rem;
  border: 2px solid #fff;
  border-radius: 999px;
  color: var(--orange-dark);
  background: #fff;
  font: inherit;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}
.button:hover, .button:focus { color: #fff; background: var(--orange-dark); border-color: var(--orange-dark); }
.button.secondary { color: #fff; background: transparent; }
.cover-column { text-align: center; }
.book-cover {
  width: min(345px, 90%);
  height: auto;
  border-radius: 2px;
  box-shadow: 0 1rem 2.5rem rgba(0,0,0,.22);
}
.intro-text { margin-top: 3.5rem; text-align: justify; }
.intro-text p { margin: 0; }

.slider-title { padding: 3.5rem 1rem 1.5rem; }
.slider-title .title { margin: 0; color: var(--orange); font-size: clamp(1.7rem, 3.2vw, 2.7rem); }
.dialog-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
  padding-top: 1.5rem;
  padding-bottom: 4rem;
}
.dialog-card {
  overflow: hidden;
  border-radius: 4px;
  background: #fff;
  box-shadow: 0 .5rem 1.5rem rgba(0,0,0,.13);
}
.video-trigger { display: block; width: 100%; padding: 0; border: 0; background: #222; cursor: pointer; }
.poster-frame { position: relative; display: block; aspect-ratio: 16 / 9; overflow: hidden; }
.poster-frame > img:not(.play-btn) { width: 100%; height: 100%; object-fit: cover; }
.play-btn {
  position: absolute;
  left: 50%; top: 50%;
  width: 74px; height: 74px;
  transform: translate(-50%, -50%);
  opacity: .92;
}
.video-trigger:hover .play-btn, .video-trigger:focus .play-btn { transform: translate(-50%, -50%) scale(1.08); }
.lowres-poster { background: #333; }
.lowres-poster > img:not(.play-btn) {
  filter: saturate(.9) contrast(1.05);
}
.poster-note {
  position: absolute;
  right: .6rem;
  bottom: .55rem;
  padding: .2rem .45rem;
  color: #fff;
  background: rgba(0,0,0,.72);
  font-size: .72rem;
}
.caption { min-height: 5.6rem; margin: 0; padding: 1.2rem 1.35rem; }
.caption strong { color: var(--orange); }

.invite { padding-top: 1rem; padding-bottom: 4rem; }
.invite .box { overflow: hidden; border: 2px solid var(--orange); border-radius: 4px; }
.invite .top, .invite .bottom { padding: 1.25rem 1.5rem; }
.invite .top { color: #fff; background: var(--orange); font-weight: 700; }
.invite .bottom { background: #fff; }

.site-footer { padding: 2rem max(1rem, 4vw); background: var(--mist); border-top: 1px solid #ddd; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.biogen-logo { width: min(250px, 70vw); height: auto; }

.overlay[hidden] { display: none; }
.overlay { position: fixed; z-index: 1000; inset: 0; display: grid; place-items: center; padding: 1rem; }
.overlay-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.72); }
.overlay-panel {
  position: relative;
  width: min(760px, 96vw);
  max-height: 90vh;
  overflow: auto;
  padding: 2rem;
  border-radius: 5px;
  background: #fff;
  box-shadow: 0 1rem 4rem rgba(0,0,0,.4);
}
.overlay-panel h2 { margin: 0 3rem 1.5rem 0; color: var(--orange); }
.close {
  position: absolute; right: 1rem; top: .7rem;
  width: 44px; height: 44px;
  border: 0; color: #555; background: transparent;
  font-size: 2.2rem; line-height: 1; cursor: pointer;
}
.publication-data { display: grid; grid-template-columns: 10rem 1fr; gap: .8rem 1.2rem; }
.publication-data dt { color: var(--orange-dark); }
.publication-data dd { margin: 0; }
.publication-panel .button { margin-top: 1.5rem; color: #fff; background: var(--orange); border-color: var(--orange); }
.video-panel { text-align: center; }
body.modal-open { overflow: hidden; }

@media (max-width: 767px) {
  body { font-size: 16px; }
  .site-header { padding-top: 1.5rem; }
  .intro { padding: 2.5rem 0; }
  .intro-copy { text-align: center; }
  .buttons { align-items: stretch; margin-bottom: 2rem; }
  .button { width: 100%; min-width: 0; }
  .dialog-grid { grid-template-columns: 1fr; gap: 1.25rem; }
  .caption { min-height: 0; }
  .footer-links { margin-bottom: 1.5rem; }
  .publication-data { grid-template-columns: 1fr; }
  .publication-data dt { margin-top: .6rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}