:root {
  --bg: #0b0d12;
  --panel: #10131c;
  --card: #151a27;
  --card-2: #1c2233;
  --line: #262d40;
  --fg: #eef1f7;
  --muted: #8b93a7;
  --accent: #7c5cff;
  --accent-2: #22d3ee;
  --danger: #f87171;
  --ok: #34d399;
  --warn: #fbbf24;
  --radius: 14px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bot: env(safe-area-inset-bottom, 0px);
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f6f7fb; --panel: #ffffff; --card: #ffffff; --card-2: #f0f2f8; --line: #e1e5ef;
    --fg: #141824; --muted: #5f6880; color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #f6f7fb; --panel: #ffffff; --card: #ffffff; --card-2: #f0f2f8; --line: #e1e5ef;
  --fg: #141824; --muted: #5f6880; color-scheme: light;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { height: 100%; margin: 0; }
body {
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, system-ui, sans-serif;
  background: var(--bg); color: var(--fg);
}
[hidden] { display: none !important; }
a { color: var(--accent-2); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; }
input, textarea, select, button { font: inherit; color: inherit; }
input, textarea, select {
  background: var(--card-2); border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; width: 100%;
}
input:focus, textarea:focus, select:focus { outline: 2px solid color-mix(in srgb, var(--accent) 60%, transparent); outline-offset: 0; }

.btn {
  border: 1px solid var(--line); background: var(--card-2); border-radius: 10px; padding: 8px 14px;
  cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 8px; white-space: nowrap;
}
.btn:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); }
.btn:disabled { opacity: .5; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--danger); }
.btn.small { padding: 5px 10px; font-size: 13px; }
.btn.wide { width: 100%; }
.icon-btn { background: none; border: 0; cursor: pointer; font-size: 18px; padding: 6px 8px; border-radius: 8px; color: var(--muted); }
.icon-btn:hover { color: var(--fg); background: var(--card-2); }
.muted { color: var(--muted); }
.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background: var(--ai, var(--muted)); flex: none; }

/* ---------- login ---------- */
.login { min-height: 100%; display: grid; grid-template-columns: minmax(0, 1fr); place-items: center; padding: calc(var(--safe-top) + 24px) 16px 24px; }
.login-card {
  max-width: 440px; width: 100%; background: var(--panel); border: 1px solid var(--line); border-radius: 20px;
  padding: 32px 24px; display: flex; flex-direction: column; gap: 12px; text-align: center; align-items: stretch;
}
.login-card img { align-self: center; }
.login-card .btn { white-space: normal; }
.login-card h1 { margin: 0; font-size: 26px; }
.lede { color: var(--muted); margin: 0 0 8px; }
.btn.google { background: #fff; color: #1f1f1f; border-color: #dadce0; padding: 11px 14px; font-weight: 600; }
.login-msg { min-height: 1.5em; margin: 0; color: var(--warn); font-size: 14px; }
.row { display: flex; gap: 8px; align-items: center; }
.fine { font-size: 12.5px; color: var(--muted); margin: 6px 0 0; }

/* ---------- layout ---------- */
.app { display: flex; height: 100%; }
.sidebar {
  width: 280px; flex: none; background: var(--panel); border-right: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 12px; padding: calc(var(--safe-top) + 14px) 12px calc(var(--safe-bot) + 12px);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; padding: 2px 4px; }
.sessions { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 2px; margin: 0 -4px; padding: 0 4px; }
.sess {
  display: flex; align-items: center; gap: 8px; padding: 9px 10px; border-radius: 10px; cursor: pointer;
  background: none; border: 0; text-align: left; width: 100%;
}
.sess:hover { background: var(--card-2); }
.sess.on { background: var(--card-2); box-shadow: inset 3px 0 0 var(--accent); }
.sess .t { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sess .dots { display: flex; gap: 3px; }
.sess .dots .dot { width: 7px; height: 7px; }
.sess .x { visibility: hidden; color: var(--muted); padding: 0 4px; }
.sess:hover .x, .sess.on .x { visibility: visible; }
.sess .x:hover { color: var(--danger); }
.side-empty { color: var(--muted); font-size: 13px; padding: 8px 10px; }
.side-foot { display: flex; flex-direction: column; gap: 8px; }
.sync { background: none; border: 1px dashed var(--line); border-radius: 10px; padding: 6px 10px; font-size: 12.5px; color: var(--muted); cursor: pointer; text-align: left; }
.sync.ok { color: var(--ok); border-style: solid; }
.sync.paused, .sync.error { color: var(--warn); }
.account { display: flex; align-items: center; gap: 10px; font-size: 13px; padding: 4px; min-width: 0; }
.account img, .account .avatar { width: 30px; height: 30px; border-radius: 50%; flex: none; background: var(--card-2); display: grid; place-items: center; }
.account .who { min-width: 0; flex: 1; }
.account .who div { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.scrim { display: none; }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  display: flex; align-items: center; gap: 8px; padding: calc(var(--safe-top) + 10px) 16px 10px;
  border-bottom: 1px solid var(--line); background: var(--panel);
}
#menuBtn { display: none; }
.title-input { background: none; border-color: transparent; font-weight: 600; font-size: 16px; padding: 6px 8px; }
.title-input:hover { border-color: var(--line); }
.participants { display: flex; gap: 4px; flex: none; }
.participants .pill { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; padding: 2px 8px; border-radius: 99px; background: var(--card-2); color: var(--muted); }

.messages { flex: 1; overflow-y: auto; padding: 20px 16px; display: flex; flex-direction: column; gap: 14px; }
.messages > * { width: 100%; max-width: 820px; margin: 0 auto; }
.msg { display: flex; flex-direction: column; gap: 4px; }
.msg .meta { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--muted); }
.msg .who { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; color: var(--fg); }
.msg .tok { margin-left: auto; font-variant-numeric: tabular-nums; }
.msg .body {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 14px;
  overflow-wrap: anywhere;
}
.msg.ai .body { border-left: 3px solid var(--ai, var(--line)); }
.msg.user .body { background: color-mix(in srgb, var(--accent) 16%, var(--card)); border-color: color-mix(in srgb, var(--accent) 30%, var(--line)); white-space: pre-wrap; }
.msg .err { color: var(--danger); font-size: 13.5px; padding: 6px 2px 0; }
.msg .err .err-hint { color: var(--muted); display: block; }
.msg .acts { display: flex; gap: 4px; opacity: 0; transition: opacity .15s; }
.msg:hover .acts, .msg:focus-within .acts, .msg.last .acts { opacity: 1; }
.msg .acts button { background: none; border: 0; color: var(--muted); font-size: 12.5px; cursor: pointer; padding: 2px 6px; border-radius: 6px; }
.msg .acts button:hover { color: var(--fg); background: var(--card-2); }
.cursor::after { content: '▍'; animation: blink 1s steps(2) infinite; color: var(--ai, var(--accent)); }
@keyframes blink { 50% { opacity: 0; } }
.stopped { color: var(--muted); font-size: 12.5px; font-style: italic; }

.md > :first-child { margin-top: 0; } .md > :last-child { margin-bottom: 0; }
.md p, .md ul, .md ol, .md pre, .md blockquote, .md .tbl { margin: .55em 0; }
.md ul, .md ol { padding-left: 1.4em; }
.md h3, .md h4, .md h5, .md h6 { margin: .9em 0 .4em; line-height: 1.3; }
.md pre { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; overflow-x: auto; }
.md :not(pre) > code { background: var(--card-2); padding: 1px 5px; border-radius: 5px; }
.md blockquote { border-left: 3px solid var(--line); margin-left: 0; padding-left: 12px; color: var(--muted); }
.md .tbl { overflow-x: auto; }
.md table { border-collapse: collapse; font-size: 14px; }
.md th, .md td { border: 1px solid var(--line); padding: 5px 9px; text-align: left; }
.md hr { border: 0; border-top: 1px solid var(--line); }

.welcome { margin: auto; text-align: center; color: var(--muted); max-width: 520px; }
.welcome h2 { color: var(--fg); margin: 0 0 6px; }
.welcome ol { text-align: left; display: inline-block; margin: 10px 0 16px; }

.composer { border-top: 1px solid var(--line); background: var(--panel); padding: 10px 16px calc(var(--safe-bot) + 10px); }
.composer > * { max-width: 820px; margin-left: auto; margin-right: auto; }
.ai-bar-wrap { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.ai-bar-label { font-size: 12.5px; color: var(--muted); flex: none; }
.ai-bar { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; align-items: center; flex: 1; padding: 2px; }
.ai-bar::-webkit-scrollbar { display: none; }
.chip {
  display: inline-flex; align-items: center; gap: 7px; padding: 5px 11px; border-radius: 99px; border: 1px solid var(--line);
  background: var(--card); cursor: pointer; white-space: nowrap; font-size: 13.5px; flex: none;
}
.chip.on { border-color: var(--ai); background: color-mix(in srgb, var(--ai) 18%, var(--card)); font-weight: 600; }
.chip.add { color: var(--muted); border-style: dashed; }
.chip .meter { width: 28px; height: 4px; background: var(--card-2); border-radius: 2px; overflow: hidden; }
.chip .meter i { display: block; height: 100%; background: var(--ok); }
.chip .meter.low i { background: var(--warn); }
.chip .meter.out i { background: var(--danger); }
.chip .cred { font-size: 11.5px; color: var(--muted); font-weight: 400; }
.chip .star { font-size: 11px; color: var(--warn); }
.chip.auto { font-weight: 600; }
.chip .rest { font-size: 10px; color: var(--warn); }
.auto-tag { font-size: 10.5px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--accent-2); border: 1px solid currentColor; border-radius: 6px; padding: 0 5px; }
.msg .switched { font-size: 12px; color: var(--muted); padding: 0 2px; }
.badge.free { color: var(--accent-2); }
.model-select { width: auto; max-width: 200px; padding: 4px 8px; font-size: 13px; border-radius: 99px; flex: none; }
.input-row { display: flex; gap: 8px; align-items: flex-end; }
.input-row textarea { resize: none; max-height: 40vh; min-height: 44px; border-radius: 12px; padding: 10px 12px; }
.send { min-height: 44px; min-width: 76px; }
.send.stop { background: var(--danger); border-color: var(--danger); }
.hint { font-size: 11.5px; color: var(--muted); margin-top: 6px; text-align: center; }

/* ---------- settings ---------- */
.settings {
  width: min(720px, calc(100vw - 24px)); max-height: calc(100dvh - 32px); padding: 0; border: 1px solid var(--line);
  border-radius: 18px; background: var(--panel); color: var(--fg);
}
.settings::backdrop { background: rgb(0 0 0 / .55); }
.settings[open] { display: flex; flex-direction: column; }
.settings-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.settings-head h2 { margin: 0; font-size: 18px; }
.settings-body { overflow-y: auto; padding: 8px 18px 20px; }
.settings h3 { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 18px 0 8px; }
.settings p.note { font-size: 13.5px; color: var(--muted); margin: 0 0 10px; }
.pcard { border: 1px solid var(--line); border-radius: 12px; margin-bottom: 8px; background: var(--card); }
.pcard summary { display: flex; align-items: center; gap: 10px; padding: 10px 14px; cursor: pointer; list-style: none; }
.pcard summary::-webkit-details-marker { display: none; }
.pcard summary .grow { flex: 1; }
.pcard summary .vendor { font-size: 13px; }
.badge { font-size: 11.5px; padding: 2px 8px; border-radius: 99px; background: var(--card-2); color: var(--muted); }
.badge.ok { color: var(--ok); }
.badge.warn { color: var(--warn); }
.pbody { padding: 4px 14px 14px; display: grid; gap: 12px; border-top: 1px solid var(--line); }
.field { display: grid; gap: 5px; font-size: 13.5px; }
.field > span { color: var(--muted); }
.field .help { font-size: 12px; color: var(--muted); }
.switch { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 14px; }
.switch input { width: auto; }
.pstatus { font-size: 13px; }
.pstatus.ok { color: var(--ok); } .pstatus.err { color: var(--danger); }
.usage-line { font-size: 13px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.bar { height: 6px; border-radius: 3px; background: var(--card-2); overflow: hidden; flex: 1; min-width: 80px; }
.bar i { display: block; height: 100%; background: var(--accent); }
.pbody details summary { cursor: pointer; font-size: 13px; color: var(--muted); }
.pbody details > .field { margin-top: 8px; }
.acct-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.ask {
  max-width: min(420px, calc(100vw - 32px)); border: 1px solid var(--line); border-radius: 16px;
  background: var(--panel); color: var(--fg); padding: 18px 20px;
}
.ask::backdrop { background: rgb(0 0 0 / .55); }
.ask p { margin: 0 0 16px; }
.ask-row { display: flex; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }
.btn.danger-fill { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn:focus-visible, .chip:focus-visible, .sess:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { .cursor::after { animation: none; } .sidebar { transition: none; } }

.toast {
  position: fixed; left: 50%; bottom: calc(var(--safe-bot) + 110px); transform: translateX(-50%); z-index: 50;
  background: var(--fg); color: var(--bg); padding: 9px 16px; border-radius: 10px; font-size: 14px; max-width: calc(100vw - 32px);
  box-shadow: 0 8px 30px rgb(0 0 0 / .35);
}

@media (max-width: 760px) {
  .sidebar {
    position: fixed; inset: 0 auto 0 0; z-index: 20; transform: translateX(-100%); transition: transform .2s; width: min(300px, 85vw);
  }
  .app.drawer .sidebar { transform: none; }
  .app.drawer .scrim { display: block; position: fixed; inset: 0; background: rgb(0 0 0 / .5); z-index: 10; }
  #menuBtn { display: inline-block; }
  .topbar { padding-left: 8px; padding-right: 10px; }
  .participants .pill span { display: none; }
  .messages { padding: 14px 10px; }
  .composer { padding-left: 10px; padding-right: 10px; }
  .ai-bar-label { display: none; }
  .hint { display: none; }
}