:root {
  --sa-brand: #F06420;
  --sa-brand-hover: #DB591C;
  --sa-ink: #111827;
  --sa-ink-muted: #6B7280;
  --sa-ink-subtle: #9CA3AF;
  --sa-surface: rgba(255,255,255,.78);
  --sa-surface-strong: rgba(255,255,255,.92);
  --sa-surface-hover: rgba(255,255,255,.98);
  --sa-border: 1px solid rgba(17,24,39,.10);
  --sa-border-strong: 1px solid rgba(17,24,39,.14);
  --sa-shadow-sm: 0 6px 18px rgba(17,24,39,.08);
  --sa-shadow-md: 0 14px 38px rgba(17,24,39,.10);
  --sa-shadow-lg: 0 20px 54px rgba(17,24,39,.12);
  --sa-route-muted: rgba(17,24,39,.25);
  --sa-route-active: var(--sa-brand);
  --sa-radius: .75rem;
  --sa-max-width: 960px;
  --sa-font: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  --sa-glass: linear-gradient(180deg, rgba(255,255,255,.82) 0%, rgba(255,255,255,.68) 100%);
}
html,
body {
  overflow-x: hidden;
}
.shareai-chat-hero {
  position: relative;
  max-width: var(--sa-max-width);
  margin: 4rem auto;
  padding: clamp(2rem, 6vw, 3rem);
  color: var(--sa-ink-muted);
  font-family: var(--sa-font);
  background: var(--sa-glass);
  backdrop-filter: blur(14px);
  border: var(--sa-border);
  border-radius: calc(var(--sa-radius) + 4px);
  box-shadow: var(--sa-shadow-md);
}
.shareai-chat-hero::before {
  content: '';
  position: absolute;
  inset: -8rem;
  z-index: -1;
  background: radial-gradient(ellipse at center, rgba(255,255,255,.55) 0%, rgba(255,255,255,0) 70%);
  filter: blur(180px);
  opacity: .65;
  pointer-events: none;
}
.sa-preview-flex {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
}
.sa-chat-col,
.sa-route-col,
.shareai-models-wrapper {
  width: 100%;
}
.sa-chat-bar {
  --bar-h: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: nowrap;
}
.shareai-chat-box {
  display: flex;
  align-items: center;
  height: var(--bar-h);
  flex: 1 1 auto;
  min-width: 0;
  background: var(--sa-surface-strong);
  border: var(--sa-border);
  border-radius: var(--sa-radius);
  box-shadow: var(--sa-shadow-sm);
  overflow: hidden;
  transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease;
}
.shareai-chat-box:hover {
  border: var(--sa-border-strong);
  background: var(--sa-surface-hover);
  box-shadow: var(--sa-shadow-md);
}
.shareai-chat-box input {
  flex: 1;
  padding-inline: 1.1rem;
  height: 100%;
  background: transparent;
  border: none;
  color: var(--sa-ink);
  font-size: 1rem;
  outline: none;
}
.shareai-chat-box input::placeholder {
  color: var(--sa-ink-subtle);
}
.sa-send-btn {
  display: grid;
  place-items: center;
  width: 60px;
  height: 100%;
  border: none;
  border-left: var(--sa-border);
  background: var(--sa-brand);
  color: #fff;
  cursor: pointer;
  transition: background .15s, transform .15s;
}
.sa-send-btn:hover {
  background: var(--sa-brand-hover);
  transform: scale(1.03);
}
.sa-join-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: var(--bar-h);
  padding-inline: 1.4rem;
  background: var(--sa-brand);
  color: rgba(255,255,255,.92);
  font: 600 .92rem/1 var(--sa-font);
  border-radius: var(--sa-radius);
  box-shadow: var(--sa-shadow-sm);
  border: var(--sa-border);
  white-space: nowrap;
  transition: transform .15s, box-shadow .15s, background .15s, color .15s;
  text-decoration: none;
}
a.sa-join-btn,
a.sa-join-btn:link,
a.sa-join-btn:visited {
  color: rgba(255,255,255,.92) !important;
  text-decoration: none;
}
a.sa-join-btn:hover,
a.sa-join-btn:focus {
  background: var(--sa-brand);
  color: #fff !important;
  transform: translateY(-1px);
  box-shadow: var(--sa-shadow-md);
}
.sa-route-col {
  display: flex;
  justify-content: center;
  pointer-events: none;
}
.sa-route-svg {
  width: 100%;
  height: 3em;
}
.sa-route-path {
  stroke: var(--sa-route-muted);
  stroke-width: 1.5;
  transition: stroke .25s;
}
.sa-route-arrow {
  fill: var(--sa-route-muted);
  transition: fill .25s, transform .25s;
}
.shareai-models {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.model-card {
  background: var(--sa-surface);
  border: var(--sa-border-strong);
  border-radius: calc(var(--sa-radius) + 2px);
  padding: 1.25rem 1.6rem 1.05rem;
  box-shadow: var(--sa-shadow-sm);
  text-align: left;
  backdrop-filter: blur(10px);
  transition: transform .18s, box-shadow .18s, background .18s, border-color .18s;
  cursor: pointer;
}
.model-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--sa-shadow-lg);
  background: var(--sa-surface-strong);
}
.model-name {
  margin: 0 0 .85rem;
  font: 700 1.05rem/1.3 var(--sa-font);
  color: var(--sa-ink);
}
.model-name small {
  display: block;
  margin-top: .15rem;
  font: 400 .72rem/1.2 var(--sa-font);
  color: var(--sa-ink-muted);
  text-transform: lowercase;
}
.model-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  row-gap: .45rem;
}
.model-card li {
  display: flex;
  justify-content: space-between;
  font-size: .86rem;
  color: var(--sa-ink);
}
.label {
  color: var(--sa-ink-muted);
}
.value {
  font-weight: 600;
  color: var(--sa-ink);
}
.model-card:hover .label,
.model-card:hover .value {
  color: var(--sa-ink);
}
.shareai-demo-link {
  margin-top: .5rem;
  font-size: .9rem;
  font-weight: 600;
  text-align: right;
  color: var(--sa-ink);
}
.shareai-demo-link a {
  color: var(--sa-ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .15s, color .15s;
}
.shareai-demo-link a:hover {
  border-color: var(--sa-ink);
  color: var(--sa-ink);
}
@media (max-width: 640px) {
  .sa-chat-bar {
    --bar-h: 52px;
    gap: .8rem;
    flex-wrap: wrap;
  }
  .shareai-chat-box button {
    width: 54px;
  }
  .sa-join-btn {
    order: 3;
    margin-top: .5rem;
    padding-inline: 1.2rem;
    font-size: .85rem;
    background: transparent;
    border: none;
    box-shadow: none;
  }
  .shareai-demo-link {
    display: none;
  }
  .shareai-models {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: 1rem 0;
  }
  .shareai-models::-webkit-scrollbar {
    display: none;
  }
  .model-card {
    flex: 0 0 80vw;
    width: 80vw;
    scroll-snap-align: center;
    margin: 0 .5rem;
  }
  .sa-route-col {
    display: flex !important;
  }
  .shareai-models-wrapper {
    position: relative;
  }
}