/* Observe has its own rhythm: introduction, source rail, then one shared media stage. */
.observe {
  padding-top: clamp(78px, 7vw, 120px);
}
.observe-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(300px, .7fr);
  align-items: end;
  gap: clamp(44px, 7vw, 140px);
  margin-bottom: clamp(38px, 4.5vw, 70px);
}
.observe .observe-intro h2 {
  max-width: 1120px;
  margin: 0;
  font-size: clamp(72px, 7.4vw, 138px);
  line-height: .88;
}
.observe-copy {
  padding: 0 0 5px clamp(24px, 3vw, 55px);
  border-left: 1px solid var(--line);
}
.observe-copy .lead {
  max-width: 430px;
  margin: 0 0 18px;
  font-size: clamp(24px, 2.15vw, 34px);
}
.observe-copy .support {
  max-width: 440px;
  font-size: clamp(14px, 1.05vw, 18px);
}
.observe .source-stack {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0 0 18px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.observe .source-stack > button {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto 1fr;
  align-items: start;
  column-gap: 12px;
  row-gap: 2px;
  min-height: 62px;
  padding: 6px clamp(14px, 1.6vw, 28px);
  border-right: 1px solid var(--line);
  border-bottom: 0;
  transition: background .2s ease;
}
.observe .source-stack > button:last-child { border-right: 0; }
.observe .source-stack > button:hover,
.observe .source-stack > button:focus-visible,
.observe .source-stack > button[aria-pressed="true"] {
  padding-left: clamp(14px, 1.6vw, 28px);
  background: #e8e0d0;
}
.observe .source-stack > button:focus-visible { outline: 2px solid var(--ink); outline-offset: -2px; }
.observe .source-stack .idx { grid-column: 1; grid-row: 1; }
.observe .source-stack .micro { grid-column: 2; grid-row: 1; white-space: nowrap; }
.observe .source-stack b {
  grid-column: 1 / -1;
  grid-row: 2;
  align-self: end;
  font-size: clamp(18px, 1.55vw, 25px);
  line-height: 1.08;
}
.observe .capture-stage {
  width: 100%;
  min-height: clamp(490px, 44vw, 675px);
  border-radius: 12px;
}
.observe .capture-panel[data-capture-panel="phone"] > img {
  object-position: center 54%;
}
.observe .capture-panel[data-capture-panel="glasses"] {
  background: #17232b;
}
.observe .capture-panel[data-capture-panel="glasses"]:before {
  content: "";
  position: absolute;
  inset: -8%;
  background: url("smart-glasses-capture.jpeg") center 35% / cover no-repeat;
  filter: blur(35px) brightness(.42);
}
.observe .capture-panel[data-capture-panel="glasses"] > img {
  left: 50%;
  width: min(45%, 540px);
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  transform: translateX(-50%);
  box-shadow: 0 0 70px rgba(0, 0, 0, .35);
}
.observe .capture-panel[data-capture-panel="glasses"]:hover > img { transform: translateX(-50%); }
.observe .capture-panel[data-capture-panel="glasses"].has-video > img { display: block; }
.observe .glasses-pip {
  display: block;
  position: absolute;
  z-index: 4;
  right: clamp(14px, 2.5%, 34px);
  bottom: clamp(14px, 3%, 28px);
  width: min(24%, 320px);
  aspect-ratio: 694 / 540;
  overflow: hidden;
  background: #17232b;
  border: 1px solid rgba(255, 250, 240, .65);
  box-shadow: 0 15px 40px rgba(0, 0, 0, .42);
}
.observe .glasses-pip-poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.observe .glasses-pip video {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
}
.observe .glasses-pip.is-playing video { opacity: 1; }
.observe .glasses-pip span {
  position: absolute;
  z-index: 1;
  left: 8px;
  top: 8px;
  padding: 6px 8px;
  background: rgba(20, 33, 42, .84);
  color: #fffaf0;
  font-family: "Arial Narrow", Arial, sans-serif;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .12em;
}
.observe .glasses-annotation { width: min(45%, 540px); }
.observe .cad-file-stage { gap: clamp(20px, 2.5vw, 42px); padding: 26px; }
.observe .cad-drawing-card { width: 36%; max-width: 500px; }
.observe .cad-viewport-card { width: 45%; max-width: 600px; }
.observe .file-gallery { gap: clamp(16px, 2vw, 32px); }
.observe .gallery-file { max-width: 205px; height: 280px; }

@media (max-width: 950px) {
  .observe-intro { grid-template-columns: 1fr; gap: 26px; }
  .observe .observe-intro h2 { max-width: 850px; }
  .observe-copy { max-width: 700px; }
  .observe .source-stack { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .observe .source-stack > button { min-height: 64px; border-bottom: 1px solid var(--line); }
  .observe .source-stack > button:nth-child(2) { border-right: 0; }
  .observe .source-stack > button:nth-child(n+3) { border-bottom: 0; }
  .observe .capture-stage { min-height: 580px; }
}
@media (max-width: 620px) {
  .observe { padding-top: 72px; }
  .observe-intro { gap: 18px; margin-bottom: 34px; }
  .observe .observe-intro h2 { font-size: clamp(58px, 13vw, 80px); }
  .observe-copy { padding-left: 18px; }
  .observe-copy .lead { font-size: 22px; margin-bottom: 12px; }
  .observe-copy .support { font-size: 14px; }
  .observe .source-stack { margin-bottom: 12px; }
  .observe .source-stack > button { min-height: 78px; row-gap: 6px; padding: 8px 12px; }
  .observe .source-stack > button:hover,
  .observe .source-stack > button:focus-visible,
  .observe .source-stack > button[aria-pressed="true"] { padding-left: 12px; }
  .observe .source-stack b { font-size: clamp(15px, 4vw, 19px); }
  .observe .source-stack .micro { font-size: 8px; }
  .observe .capture-stage { min-height: 430px; }
  .observe .capture-panel[data-capture-panel="phone"] > img { object-position: 55% center; }
  .observe .capture-panel[data-capture-panel="glasses"] > img { width: 66%; }
  .observe .glasses-pip { width: min(45%, 220px); right: 10px; bottom: 10px; }
  .observe .glasses-annotation { width: 66%; }
  .observe .glasses-annotation span { left: 6%; top: 11%; font-size: 9px; padding: 7px 8px; }
  .observe .glasses-annotation i { display: none; }
  .observe .cad-file-stage { gap: 10px; padding: 14px; }
  .observe .cad-drawing-card { width: 42%; }
  .observe .cad-viewport-card { width: 53%; }
  .observe .file-gallery { gap: 12px; }
  .observe .gallery-file { max-width: none; height: 115px; }
}