/* Open first-screen composition. Shared sections and demo timing stay intact. */
#main > .hero-open {
  display: block;
  height: auto;
  min-height: 0;
  padding: 56px 32px 72px;
  overflow: visible;
}
#main > .hero-open > .hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto auto;
  align-content: start;
  gap: 56px;
  width: 100%;
  max-width: 1392px;
  min-height: 0;
  margin: 0 auto;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  overflow: visible;
}
.hero-open .hero-intro { gap: 24px; }
.hero-open .hero-intro > .hero-tag {
  padding: 0;
  border: 0;
  background: transparent;
  letter-spacing: .12em;
}
.hero-open .hero-copy {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  grid-template-rows: auto auto auto;
  align-items: center;
  gap: 36px 64px;
  max-width: none;
}
.hero-open .hero-heading { grid-column: 1 / -1; grid-row: 1; }
.hero-open h1 {
  max-width: none;
  margin: 0;
  font-size: clamp(44px, 5.6vw, 80px);
  font-weight: 400;
  line-height: 1.025;
  letter-spacing: -.065em;
  /* Match the visible glyph edge to the body text, accounting for the
     Instrument Sans side bearing at the larger heading size. */
  transform: translateX(calc(1.4px - .087em));
}
.hero-open .h1-soft { margin-top: 8px; }
.hero-open .hero-copy > .lead {
  grid-column: 1;
  grid-row: 2;
  align-self: center;
  max-width: 680px;
  margin: 0;
  padding: 0;
  font-size: 16px;
  line-height: 1.7;
}
.hero-open .hero-copy > .cta-row {
  grid-column: 1;
  grid-row: 3;
  align-self: center;
  justify-content: flex-start;
  flex-direction: row;
  gap: 12px;
  width: auto;
  margin: 0;
  padding: 0;
  border: 0;
}
.hero-open .cta-row .btn { min-height: 50px; padding: 17px 24px; font-size: 14px; }

/* A broad terminal and two supporting windows share a single clear stage. */
.hero-open .hero-visual { min-width: 0; height: auto; padding: 0; }
.hero-open .demo {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  grid-template-rows: auto auto auto;
  grid-template-areas: "terminal chat" "terminal optimization" "controls controls";
  gap: 16px;
  width: 100%;
  max-width: none;
  height: auto;
  min-height: 0;
  margin: 0;
  padding: 0;
}
.hero-open .demo-app {
  grid-area: terminal;
  box-shadow: 0 12px 32px #30271e12;
}
.hero-open .demo-chat { grid-area: chat; }
.hero-open .demo-toast { grid-area: optimization; }
.hero-open .demo-chat, .hero-open .demo-toast { position: relative; inset: auto; width: 100%; margin: 0; }
.hero-open .demo-app > .term-bar { height: 48px; min-height: 48px; padding: 0 22px; }
.hero-open .demo .term-title { font-size: 12px; }
.hero-open .demo-body { min-height: 0; padding: 20px 22px 0; }
.hero-open .demo-ask { margin-bottom: 14px; }
.hero-open .demo-steps { gap: 8px; font-size: 14px; line-height: 1.6; }
.hero-open .demo .bubble { padding: 8px 12px; font-size: 14px; line-height: 1.45; }
.hero-open .demo-live { margin-top: 18px; padding-top: 14px; font-size: 11px; }
.hero-open .demo-composer { margin: 18px 22px; padding: 12px 14px; font-size: 12px; }
.hero-open .demo-chat .chat-head { padding: 12px 20px; font-size: 14px; }
.hero-open .demo-chat .chat-body { gap: 10px; padding: 16px 20px; font-size: 14px; }
.hero-open .demo-chat .msg { padding: 7px 12px; }
.hero-open .demo-toast { padding: 20px; font-size: 14px; }
.hero-open .demo-toast b { font-size: 15px; }
.hero-open .gains, .hero-open .gains > :not(:nth-child(3n + 1)) { font-size: 12px; }
.hero-open .demo-controls { grid-area: controls; margin-top: 0; }

@media (min-width: 1100px) and (hover: hover) and (pointer: fine) {
  #main > .hero-open {
    --hero-top: clamp(108px, 12svh, 148px);
    --hero-bottom: clamp(20px, 2svh, 40px);
    min-height: 100svh;
    padding: var(--hero-top) 56px var(--hero-bottom);
  }
  #main > .hero-open > .hero-grid {
    min-height: calc(100svh - var(--hero-top) - var(--hero-bottom));
    grid-template-rows: auto minmax(460px, 1fr);
    gap: 56px;
  }
  .hero-open .hero-intro { gap: 20px; }
  .hero-open .hero-copy { row-gap: 24px; }
  /* Give the animation the remaining first-screen height, with readable
     content as the minimum and a limit on very tall displays. */
  .hero-open .hero-visual { align-self: stretch; max-height: 560px; }
  .hero-open .demo {
    height: 100%;
    min-height: 460px;
    max-height: 560px;
    grid-template-rows: minmax(min-content, 1fr) minmax(min-content, 1fr) 32px;
  }
  .hero-open .demo-app { display: flex; flex-direction: column; }
  .hero-open .demo-body { flex: 1; display: flex; flex-direction: column; }
  .hero-open .demo-steps { margin-bottom: 18px; }
  .hero-open .demo-live { margin-top: auto; }
  .hero-open .demo-chat { display: flex; flex-direction: column; }
  .hero-open .demo-chat .chat-body { flex: 1; align-content: center; }
}
@media (max-width: 1040px) {
  .hero-open .hero-copy { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .hero-open .hero-copy > .lead { grid-column: 1; grid-row: 2; max-width: 700px; }
  .hero-open .demo {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-areas: "terminal terminal" "chat optimization" "controls controls";
  }
  .hero-open .demo-body { min-height: 0; }
  .hero-open .demo-chat .chat-head { padding: 10px 18px; font-size: 13px; }
  .hero-open .demo-chat .chat-body { padding: 12px 18px; font-size: 13px; }
  .hero-open .demo-toast { padding: 16px 18px; font-size: 13px; }
  .hero-open .demo-toast b { font-size: 14px; }
  .hero-open .gains, .hero-open .gains > :not(:nth-child(3n + 1)) { font-size: 11px; }
}
@media (max-width: 600px) {
  #main > .hero-open { padding: 40px 20px 56px; }
  #main > .hero-open > .hero-grid { gap: 36px; }
  .hero-open .hero-intro { gap: 20px; }
  .hero-open .hero-copy { gap: 24px; }
  .hero-open h1 { font-size: clamp(32px, 8.8vw, 44px); line-height: 1.06; transform: translateX(calc(1.2px - .087em)); }
  .hero-open .hero-copy > .lead { font-size: 14px; line-height: 1.75; }
  .hero-open .hero-copy > .cta-row { gap: 10px; }
  .hero-open .cta-row .btn { padding: 15px 18px; font-size: 12px; }
  .hero-open .demo {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: "terminal" "chat" "optimization" "controls";
    gap: 16px;
  }
  .hero-open .demo-app > .term-bar { padding-inline: 16px; }
  .hero-open .demo .term-title { font-size: 10px; }
  .hero-open .demo-body { padding: 16px 16px 0; }
  .hero-open .demo .bubble { font-size: 12px; }
  .hero-open .demo-steps { font-size: 12px; gap: 10px; }
  .hero-open .demo-live { font-size: 10px; }
  .hero-open .demo-composer { margin: 14px 16px 16px; padding: 10px 12px; font-size: 11px; }
}