* { box-sizing: border-box; }
:root { color-scheme: dark; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", sans-serif; background: #191919; color: #ececec; }
.hidden { display: none !important; }
.muted { color: #9a9a9a; }
.error { color: #ff7b72; min-height: 1.2em; font-size: .9rem; }

/* Auth */
.auth { min-height: 100vh; display: grid; place-items: center; background: #141414; }
.auth-card { text-align: center; width: min(92vw, 340px); }
.auth-avatar { width: 92px; height: 92px; border-radius: 50%; object-fit: cover; }
.auth-card h1 { margin: .6rem 0 .2rem; font-size: 1.5rem; }
.auth-card form { display: flex; flex-direction: column; gap: .6rem; margin-top: 1.2rem; }
.auth-card input { padding: .8rem 1rem; border-radius: 12px; border: 1px solid #3a3a3a; background: #232323; color: #fff; font-size: 1rem; }
.auth-card button { padding: .8rem 1rem; border-radius: 12px; border: 0; background: #2f6fed; color: #fff; font-size: 1rem; cursor: pointer; }

/* Layout */
.layout { display: flex; height: 100vh; }
.rail { width: 56px; background: #1e1e1e; display: flex; flex-direction: column; align-items: center; padding: .7rem 0; gap: .35rem; border-right: 1px solid #262626; }
.rail-btn { width: 38px; height: 38px; border-radius: 50%; border: 0; background: transparent; color: #ddd; font-size: 1rem; cursor: pointer; }
.rail-btn:hover { background: #2c2c2c; }
.rail-btn.active { background: #333; }
.rail-spacer { flex: 1; }

.sidebar { width: 264px; background: #202020; border-right: 1px solid #262626; padding: .9rem .8rem; display: flex; flex-direction: column; min-height: 0; }
.search-box { display: flex; align-items: center; gap: .5rem; background: #2b2b2b; border-radius: 999px; padding: .5rem .9rem; }
.search-box input { flex: 1; background: transparent; border: 0; outline: 0; color: #eee; font-size: .95rem; min-width: 0; }
.search-box .dots { color: #888; }
.main-chat { color: #eee; text-decoration: none; padding: .9rem .4rem .4rem; font-size: .98rem; }
.side-head { display: flex; justify-content: space-between; align-items: center; color: #bdbdbd; padding: .7rem .4rem .4rem; font-size: .98rem; }
.side-head button { width: 26px; height: 26px; border-radius: 50%; border: 0; background: #2e2e2e; color: #eee; font-size: 1rem; cursor: pointer; }
.thread-list { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 2px; min-height: 0; }
.thread-item { display: flex; align-items: center; gap: .5rem; padding: .55rem .5rem; border-radius: 10px; cursor: pointer; color: #e6e6e6; font-size: .93rem; }
.thread-item:hover { background: #2a2a2a; }
.thread-item.active { background: #2f2f2f; }
.thread-item .t { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.thread-item .pend { width: 8px; height: 8px; border-radius: 50%; background: #f5a623; flex: none; }
.thread-item .del { background: transparent; border: 0; color: #888; cursor: pointer; font-size: .85rem; padding: 0 2px; }
.bridge-status { color: #777; font-size: .72rem; padding: .6rem .4rem 0; border-top: 1px solid #2b2b2b; }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; background: #191919; }
.home { text-align: center; padding-top: 4.5rem; }
.home-avatar { width: 74px; height: 74px; border-radius: 50%; object-fit: cover; }
.name-chip { display: inline-block; margin-top: .5rem; background: #2c2c2c; color: #eee; padding: .3rem 1rem; border-radius: 999px; font-size: .95rem; }
.home-sub { color: #9a9a9a; max-width: 480px; margin: 1rem auto 0; line-height: 1.5; font-size: .93rem; padding: 0 1rem; }

.messages { flex: 1; overflow-y: auto; padding: 2rem 1rem 1rem; }
.msg-row { max-width: 760px; margin: 0 auto 1.4rem; display: flex; gap: .7rem; }
.msg-row.user { justify-content: flex-end; }
.bubble { max-width: 85%; line-height: 1.55; font-size: .97rem; word-wrap: break-word; }
.msg-row.user .bubble { background: #2e2e2e; padding: .7rem 1rem; border-radius: 18px; }
.msg-row.assistant .bubble { padding-top: .2rem; }
.bubble p { margin: 0 0 .7rem; }
.bubble p:last-child { margin-bottom: 0; }
.bubble pre { background: #111; border: 1px solid #2c2c2c; border-radius: 10px; padding: .8rem; overflow-x: auto; }
.bubble code { background: #262626; padding: .1rem .35rem; border-radius: 5px; font-size: .88em; }
.bubble pre code { background: transparent; padding: 0; }
.bubble ul, .bubble ol { margin: .3rem 0 .7rem; padding-left: 1.3rem; }
.bubble a { color: #6ea8ff; }
.msg-avatar { width: 30px; height: 30px; border-radius: 50%; object-fit: cover; flex: none; }
.waiting { max-width: 760px; margin: 0 auto 1.4rem; color: #999; font-size: .9rem; display: flex; gap: .6rem; align-items: center; }
.waiting .dotpulse { animation: pulse 1.2s infinite; }
@keyframes pulse { 0%,100% { opacity: .3; } 50% { opacity: 1; } }

.composer-wrap { padding: 0 1rem 1.6rem; }
.composer { max-width: 760px; margin: 0 auto; background: #2b2b2b; border-radius: 999px; display: flex; align-items: center; padding: .45rem .6rem .45rem 1rem; gap: .6rem; }
.composer .plus { color: #ccc; font-size: 1.25rem; }
.composer input { flex: 1; background: transparent; border: 0; outline: 0; color: #eee; font-size: 1rem; min-width: 0; }
.composer button { width: 36px; height: 36px; border-radius: 50%; border: 0; background: #3d3d3d; color: #eee; cursor: pointer; }
.composer button:hover { background: #4a4a4a; }

@media (max-width: 720px) {
  .sidebar { display: none; }
  .sidebar.open { display: flex; position: fixed; z-index: 5; height: 100vh; }
}