:root {
  --bg: #f6f7fb; --panel: #ffffff; --panel-2: #f0f2f8; --text: #161a26; --muted: #5d6478; --line: #dfe3ee;
  --accent: #5b5bf0; --accent-ink: #ffffff; --danger: #c53030; --ok: #1f8a4c; --warn: #b7791f;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1017; --panel: #151a24; --panel-2: #1c2230; --text: #e6e9f2; --muted: #9aa3b8; --line: #2a3142;
    --accent: #8b8bff; --accent-ink: #0d1017; --danger: #f07070; --ok: #4fd18b; --warn: #f0b860;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.55 var(--sans); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre, .mono { font-family: var(--mono); font-size: 13px; }
pre { background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; padding: 12px; overflow: auto;
      white-space: pre-wrap; word-break: break-word; }

.top { display: flex; align-items: center; gap: 18px; padding: 10px 20px; border-bottom: 1px solid var(--line);
       background: var(--panel); position: sticky; top: 0; z-index: 5; }
.brand { font-weight: 700; letter-spacing: .2px; color: var(--text); }
.brand span { color: var(--accent); }
.top nav { display: flex; gap: 14px; flex: 1; flex-wrap: wrap; }
.top nav a { color: var(--muted); }
.top nav a.on, .top nav a:hover { color: var(--text); text-decoration: none; }
.who { color: var(--muted); font-size: 13px; display: flex; gap: 10px; align-items: center; }

main.page { max-width: 1120px; margin: 0 auto; padding: 24px 16px 60px; }
h1 { font-size: 24px; margin: 0 0 4px; }
h2 { font-size: 17px; margin: 28px 0 10px; scroll-margin-top: 64px; }
.sub { color: var(--muted); margin: 0 0 18px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.stat b { display: block; font-size: 22px; }
.stat span { color: var(--muted); font-size: 13px; }
.bar { height: 6px; background: var(--panel-2); border-radius: 4px; overflow: hidden; margin-top: 8px; }
.bar i { display: block; height: 100%; background: var(--accent); }
.bar i.hot { background: var(--danger); }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; }
td.r, th.r { text-align: right; }
.tablewrap { overflow-x: auto; }
.pill { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; background: var(--panel-2);
        border: 1px solid var(--line); color: var(--muted); }
.pill.ok { color: var(--ok); } .pill.bad { color: var(--danger); } .pill.svc { color: var(--warn); }

form.inline { display: inline; }
label { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 4px; }
input[type=text], input[type=email], input[type=number], select, textarea {
  width: 100%; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel-2);
  color: var(--text); font: inherit; }
.checks { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.checks label { display: flex; gap: 6px; align-items: center; margin: 0; color: var(--text); }
button, .btn { display: inline-block; padding: 8px 14px; border-radius: 8px; border: 1px solid var(--accent);
  background: var(--accent); color: var(--accent-ink); font: inherit; font-weight: 600; cursor: pointer; }
button.ghost, .btn.ghost { background: transparent; color: var(--text); border-color: var(--line); }
button.danger { background: transparent; color: var(--danger); border-color: var(--danger); padding: 4px 10px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: end; }
.row > * { flex: 1; min-width: 160px; }
.row > .tight { flex: 0 0 auto; min-width: 0; }
.flash { border-radius: 10px; padding: 12px 14px; margin: 0 0 16px; border: 1px solid var(--line); background: var(--panel); }
.flash.err { border-color: var(--danger); color: var(--danger); }
.flash.key { border-color: var(--ok); }
.flash.key code { display: block; margin-top: 8px; padding: 10px; background: var(--panel-2); border-radius: 6px;
                  user-select: all; word-break: break-all; color: var(--text); }

/* sign-in */
.signin { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.signin .card { max-width: 420px; width: 100%; padding: 28px; text-align: center; }
.ms { display: inline-flex; align-items: center; gap: 10px; margin-top: 16px; }
.ms svg { width: 18px; height: 18px; }

/* chat */
.chat { display: grid; grid-template-columns: 260px 1fr; height: calc(100vh - 49px); }
.side { border-right: 1px solid var(--line); background: var(--panel); overflow-y: auto; padding: 12px; }
.side a.conv { display: block; padding: 7px 10px; border-radius: 8px; color: var(--text); white-space: nowrap;
               overflow: hidden; text-overflow: ellipsis; font-size: 14px; }
.side a.conv.on, .side a.conv:hover { background: var(--panel-2); text-decoration: none; }
.side .new { display: block; text-align: center; margin-bottom: 12px; }
.pane { display: flex; flex-direction: column; min-width: 0; }
#log { flex: 1; overflow-y: auto; padding: 24px 16px; }
.turn { max-width: 820px; margin: 0 auto 18px; }
.turn .who { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .5px; margin-bottom: 4px; }
.turn.user .body { background: var(--panel-2); border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px;
                   white-space: pre-wrap; }
.turn.assistant .body { padding: 2px 2px; overflow-wrap: anywhere; }
.turn.assistant .body p:first-child { margin-top: 0; }
.turn .note { color: var(--warn); font-size: 13px; }
.compose { border-top: 1px solid var(--line); background: var(--panel); padding: 12px 16px; }
.compose form { max-width: 820px; margin: 0 auto; display: grid; grid-template-columns: 1fr auto; gap: 8px; }
.compose textarea { resize: vertical; min-height: 64px; max-height: 40vh; }
.compose .meta { grid-column: 1 / -1; display: flex; gap: 12px; align-items: center; color: var(--muted); font-size: 13px; }
.compose select { width: auto; padding: 4px 8px; }
.empty { color: var(--muted); text-align: center; margin-top: 18vh; }
@media (max-width: 760px) {
  .chat { grid-template-columns: 1fr; }
  .side { display: none; }
  .top { flex-wrap: wrap; }
}

/* attachments */
.files { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 6px; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 999px; font-size: 13px;
        background: var(--panel-2); border: 1px solid var(--line); color: var(--text); max-width: 100%; }
.chip:hover { text-decoration: none; border-color: var(--accent); }
.chip.busy { color: var(--muted); font-style: italic; }
.chip .x { border: 0; background: transparent; color: var(--muted); padding: 0 2px; font-size: 15px; line-height: 1; cursor: pointer; }
.chip .x:hover { color: var(--danger); }
.turn.user .files { max-width: 820px; }
.compose form { grid-template-columns: 1fr auto; }
.compose #pending { grid-column: 1 / -1; }
.compose .actions { display: flex; flex-direction: column; gap: 6px; }
.compose .actions #attach { font-size: 16px; padding: 6px 10px; }
.compose.drop { outline: 2px dashed var(--accent); outline-offset: -6px; }