:root {
  color-scheme: light dark;
  --bg: #f6f5f1; --panel: #ffffff; --text: #1b1c1e; --muted: #6b6f76;
  --line: #dedcd5; --me: #2f5fd0; --me-text: #ffffff; --ai: #ffffff; --err: #b3261e;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c; --panel: #1f2227; --text: #eceef1; --muted: #9aa0a9;
    --line: #2f333a; --me: #4a7bf0; --me-text: #ffffff; --ai: #23272d; --err: #ff8a80;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  display: flex; flex-direction: column; height: 100dvh;
  background: var(--bg); color: var(--text);
  font: 17px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}
header {
  display: flex; align-items: center; gap: 8px;
  padding: calc(8px + env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 8px max(16px, env(safe-area-inset-left));
  border-bottom: 1px solid var(--line);
}
h1 { flex: 1; margin: 0; font-size: 19px; font-weight: 600; }
main {
  flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch;
  display: flex; flex-direction: column; gap: 8px;
  padding: 12px max(16px, env(safe-area-inset-right)) 12px max(16px, env(safe-area-inset-left));
}
.msg {
  max-width: 85%; padding: 9px 13px; border-radius: 18px;
  white-space: pre-wrap; overflow-wrap: anywhere;
}
.msg.me { align-self: flex-end; background: var(--me); color: var(--me-text); border-bottom-right-radius: 6px; }
.msg.ai { align-self: flex-start; background: var(--ai); border: 1px solid var(--line); border-bottom-left-radius: 6px; }
.msg.err { color: var(--err); }
footer {
  display: flex; align-items: flex-end; gap: 8px;
  padding: 8px max(16px, env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  border-top: 1px solid var(--line); background: var(--panel);
}
/* 16px+ on inputs: anything smaller makes iOS Safari zoom the page on focus */
textarea, input {
  font: inherit; color: inherit; background: var(--bg);
  border: 1px solid var(--line); border-radius: 18px; padding: 9px 13px;
}
textarea { flex: 1; resize: none; max-height: 8em; }
input { width: 100%; border-radius: 10px; }
button {
  font: inherit; color: inherit; background: none; border: 1px solid var(--line);
  border-radius: 18px; min-width: 44px; min-height: 44px; padding: 0 12px; cursor: pointer;
}
button:disabled { opacity: .45; }
button.primary, #send { background: var(--me); color: var(--me-text); border-color: var(--me); }
#mic[data-mode="standby"] { border-color: var(--me); box-shadow: 0 0 0 2px var(--me); }
#mic[data-mode="active"] { background: var(--err); border-color: var(--err); color: #fff; }
#status { margin: 0; padding: 6px 16px; text-align: center; font-size: 14px; color: var(--muted); }
:focus-visible { outline: 2px solid var(--me); outline-offset: 2px; }
dialog {
  width: min(92vw, 420px); border: 1px solid var(--line); border-radius: 16px;
  background: var(--panel); color: var(--text); padding: 20px;
}
dialog::backdrop { background: rgba(0, 0, 0, .45); }
h2 { margin: 0 0 12px; font-size: 19px; }
label { display: block; margin: 12px 0 4px; font-size: 15px; color: var(--muted); }
.hint { margin: 6px 0 0; font-size: 13px; color: var(--muted); }
.row { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }
[hidden] { display: none !important; }