:root { --fg: #1d1d1f; --bg: #fafaf7; --muted: #5f6368; --line: #d9d9d3; --accent: #2f5d50; --err: #a4281b; }
@media (prefers-color-scheme: dark) { :root { --fg: #ececea; --bg: #161616; --muted: #a0a0a0; --line: #333; --accent: #8fc1b0; --err: #f08a7e; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 42rem; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
h1 { font-size: 1.4rem; margin: 0 0 .5rem; }
.note { color: var(--muted); font-size: .9rem; }
.error { color: var(--err); min-height: 1.2em; }
label { display: block; margin: .75rem 0; }
input, textarea { width: 100%; padding: .55rem .6rem; border: 1px solid var(--line); border-radius: 6px; background: transparent; color: inherit; font: inherit; }
button { padding: .5rem .9rem; border: 1px solid var(--accent); border-radius: 6px; background: var(--accent); color: var(--bg); font: inherit; cursor: pointer; }
button[type="button"] { background: transparent; color: var(--accent); }
.row { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: .5rem; }
#log { margin: 1rem 0; display: flex; flex-direction: column; gap: .6rem; }
.msg { padding: .6rem .75rem; border-radius: 8px; white-space: pre-wrap; overflow-wrap: anywhere; }
.me { align-self: flex-end; background: var(--line); max-width: 85%; }
.reply { align-self: flex-start; border: 1px solid var(--line); max-width: 95%; }