.topbar {
  position: sticky;
  top: 0;
  z-index: 200;
  background: transparent;
  overflow: visible;
}
.topbar.scrolled { background: var(--bg); }
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s3);
  padding: var(--s3) 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--s3);
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: inherit;
  padding: 0;
}
.brand small { display: block; color: var(--faint); font-size: 11px; letter-spacing: 0.04em; }
.nav-links { display: flex; align-items: center; gap: 2px; overflow: visible; }
.nav-toggle {
  display: none;
  width: var(--touch);
  height: var(--touch);
  border: 0;
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.site-foot {
  width: min(960px, calc(100% - 40px));
  margin: 0 auto;
  padding: var(--s4) 0 var(--s7);
  color: var(--faint);
  font-size: 12px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.starter {
  display: inline-flex;
  align-items: center;
  gap: var(--s2);
  padding: 10px var(--s4);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--muted);
  font-size: 13.5px;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.starter:hover { background: var(--surface); color: var(--text); }

.dock {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s2);
  padding: var(--s2) 20px var(--s6);
}
.foot-note { margin: 0; color: var(--faint); font-size: 12px; text-align: center; }

.composer {
  display: flex;
  align-items: flex-end;
  gap: var(--s2);
  width: 100%;
  max-width: 760px;
  padding: var(--s2) var(--s2) var(--s2) var(--s3);
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--panel);
  transition: border-color var(--dur) var(--ease);
}
.composer:focus-within { border-color: var(--blue); }
.composer input,
.composer textarea,
#homePrompt {
  flex: 1;
  min-height: 36px;
  max-height: 168px;
  width: 100%;
  padding: 7px 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font: 400 16px/1.5 var(--font-sans);
  resize: none;
  outline: none;
}
.composer textarea::placeholder,
#homePrompt::placeholder { color: var(--faint); }
.composer-right { display: flex; align-items: center; gap: var(--s1); }
.send {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 50%;
  background: var(--blue);
  color: var(--on-blue);
  cursor: pointer;
}
.send:hover { filter: brightness(1.1); }

.theme-select-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 4px 0 10px;
  border-radius: var(--r-pill);
  color: var(--muted);
  cursor: pointer;
  position: relative;
  z-index: 80;
}
.theme-select-label:hover { background: var(--surface-hi); color: var(--text); }
.theme-select-label select {
  appearance: none;
  -webkit-appearance: none;
  border: 0;
  background: transparent;
  color: var(--text);
  font: 400 14px var(--font-sans);
  cursor: pointer;
  max-width: 168px;
  padding: 0 22px 0 0;
  outline: none;
}
.theme-select-label::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid var(--muted);
  pointer-events: none;
  margin-left: -16px;
}

@media (max-width: 800px) {
  .nav-toggle { display: grid; place-items: center; }
  .nav-links {
    display: none;
    position: absolute;
    right: 20px;
    top: 56px;
    z-index: 210;
    flex-direction: column;
    align-items: stretch;
    min-width: 220px;
    padding: var(--s2);
    border-radius: var(--r-md);
    background: var(--panel);
    box-shadow: var(--shadow-float);
    overflow: visible;
  }
  .topbar.nav-open .nav-links { display: flex; }
  .theme-select-label { width: 100%; }
  .theme-select-label select { max-width: none; flex: 1; }
  .site-foot { flex-direction: column; }
}