/* ── tokens ─────────────────────────────────────────────────────────── */
:root {
  --bg: #0f1012;
  --bg-2: #141518;
  --bg-3: #1a1c20;
  --line: #26282e;
  --line-soft: #1e2025;
  --ink: #ecedef;
  --ink-2: #a4a8b0;
  --ink-3: #6e737d;
  --accent: #e8843c;
  --accent-soft: rgba(232, 132, 60, 0.14);
  --good: #4fb477;
  --bad: #e0645c;
  --radius: 12px;
  --sans: ui-sans-serif, -apple-system, "Segoe UI", Inter, system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
html[data-theme="light"] {
  --bg: #fbfaf8; --bg-2: #ffffff; --bg-3: #f2f0ed;
  --line: #e2ded8; --line-soft: #ece9e4;
  --ink: #1b1a18; --ink-2: #57534d; --ink-3: #8b867e;
  --accent-soft: rgba(232, 132, 60, 0.13);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}
button, input, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }

.mark {
  width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center;
  background: var(--accent); color: #fff; font-weight: 700; font-size: 19px;
}
.mark.big { width: 52px; height: 52px; font-size: 25px; border-radius: 15px; }

.primary {
  background: var(--accent); color: #fff; border: 0; border-radius: 10px;
  padding: 11px 16px; font-weight: 600; cursor: pointer;
}
.primary:hover { filter: brightness(1.07); }
.primary:disabled { opacity: .5; cursor: default; filter: none; }
.primary.small { padding: 8px 14px; }
.ghost {
  background: transparent; border: 1px solid var(--line); border-radius: 9px;
  padding: 7px 11px; color: var(--ink-2); cursor: pointer;
}
.ghost:hover { color: var(--ink); border-color: var(--ink-3); }

/* ── sign in ────────────────────────────────────────────────────────── */
.gate { min-height: 100%; display: grid; place-items: center; padding: 24px; }
.gate-card {
  width: 100%; max-width: 380px; background: var(--bg-2);
  border: 1px solid var(--line); border-radius: 18px; padding: 30px;
  display: flex; flex-direction: column; gap: 14px;
}
.gate-card h1 { margin: 10px 0 0; font-size: 25px; letter-spacing: -.02em; }
.gate-card .sub { margin: 0 0 6px; color: var(--ink-2); font-size: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field > span { font-size: 12.5px; color: var(--ink-2); font-weight: 500; }
.field input {
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
  padding: 11px 13px; outline: none;
}
.field input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.field.inline { flex-direction: row; align-items: center; gap: 9px; }
.field.inline input { width: 110px; }
.gate-error { margin: 0; color: var(--bad); font-size: 13.5px; }

/* ── shell ──────────────────────────────────────────────────────────── */
.app { display: grid; grid-template-columns: 264px 1fr; height: 100%; }

.sidebar {
  background: var(--bg-2); border-right: 1px solid var(--line);
  display: flex; flex-direction: column; min-height: 0;
}
.sidebar-top { padding: 14px; }
.new-chat {
  width: 100%; display: flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--bg-3); border: 1px solid var(--line); border-radius: 10px;
  padding: 10px; cursor: pointer; font-weight: 500;
}
.new-chat:hover { border-color: var(--accent); color: var(--accent); }

.chat-list { flex: 1; overflow-y: auto; padding: 0 8px 8px; min-height: 0; }
.chat-row {
  display: flex; align-items: center; gap: 6px; width: 100%;
  padding: 8px 10px; border-radius: 9px; cursor: pointer;
  border: 0; background: transparent; text-align: left; color: var(--ink-2);
}
.chat-row:hover { background: var(--bg-3); color: var(--ink); }
.chat-row.on { background: var(--accent-soft); color: var(--ink); }
.chat-row .t { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13.5px; }
.chat-row .x { opacity: 0; border: 0; background: none; color: var(--ink-3); cursor: pointer; padding: 2px 4px; border-radius: 5px; }
.chat-row:hover .x { opacity: 1; }
.chat-row .x:hover { color: var(--bad); background: var(--bg); }
.day { font-size: 11px; text-transform: uppercase; letter-spacing: .07em; color: var(--ink-3); padding: 14px 10px 5px; }

.sidebar-foot { border-top: 1px solid var(--line); padding: 12px; display: flex; flex-direction: column; gap: 9px; }
.admin-link {
  background: var(--accent-soft); color: var(--accent); border: 0; border-radius: 9px;
  padding: 8px; cursor: pointer; font-weight: 600; font-size: 13.5px;
}
.who { font-size: 12.5px; }
.who-email { color: var(--ink-2); overflow: hidden; text-overflow: ellipsis; }
.who-owed { color: var(--ink-3); margin-top: 2px; }

/* ── main ───────────────────────────────────────────────────────────── */
.main { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.topbar {
  display: flex; align-items: center; gap: 12px; padding: 11px 18px;
  border-bottom: 1px solid var(--line); background: var(--bg);
}
.chat-title { flex: 1; font-weight: 550; font-size: 14.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.icon-btn { background: none; border: 0; color: var(--ink-2); cursor: pointer; padding: 4px; }
.only-narrow { display: none; }

.models { display: flex; gap: 3px; background: var(--bg-3); border-radius: 10px; padding: 3px; }
.models button {
  border: 0; background: transparent; color: var(--ink-2); cursor: pointer;
  padding: 6px 13px; border-radius: 8px; font-size: 13px; font-weight: 500;
}
.models button.on { background: var(--bg); color: var(--ink); box-shadow: 0 1px 3px rgba(0,0,0,.25); }
html[data-theme="light"] .models button.on { box-shadow: 0 1px 3px rgba(0,0,0,.08); }

.scroll { flex: 1; overflow-y: auto; min-height: 0; scroll-behavior: smooth; }
.thread { max-width: 780px; margin: 0 auto; padding: 26px 22px 8px; }
.empty { max-width: 780px; margin: 12vh auto; padding: 0 22px; text-align: center; }
.empty h2 { margin: 18px 0 6px; font-size: 22px; letter-spacing: -.02em; }
.empty p { color: var(--ink-2); margin: 0; font-size: 14px; }
.empty .mark { margin: 0 auto; }

/* ── messages ───────────────────────────────────────────────────────── */
.msg { margin-bottom: 26px; }
.msg.user .bubble {
  background: var(--bg-3); border: 1px solid var(--line-soft);
  border-radius: 14px; padding: 12px 15px; white-space: pre-wrap; word-break: break-word;
}
.msg.user { display: flex; justify-content: flex-end; }
.msg.user .bubble { max-width: 85%; }
.role { font-size: 11.5px; color: var(--ink-3); margin-bottom: 7px; letter-spacing: .04em; text-transform: uppercase; }

.think { margin-bottom: 10px; border: 1px solid var(--line-soft); border-radius: 10px; background: var(--bg-2); }
.think > summary { cursor: pointer; padding: 8px 12px; font-size: 12.5px; color: var(--ink-3); list-style: none; }
.think > summary::-webkit-details-marker { display: none; }
.think > summary::before { content: "▸ "; }
.think[open] > summary::before { content: "▾ "; }
.think .body { padding: 0 12px 11px; color: var(--ink-2); font-size: 13.5px; white-space: pre-wrap; }

.notice { font-size: 13px; color: var(--accent); background: var(--accent-soft); border-radius: 9px; padding: 8px 12px; margin-bottom: 10px; }
.err { color: var(--bad); font-size: 13.5px; }

.caret::after {
  content: ""; display: inline-block; width: 7px; height: 15px;
  background: var(--accent); margin-left: 2px; vertical-align: -2px;
  animation: blink 1.05s steps(2, start) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ── markdown ───────────────────────────────────────────────────────── */
.md > *:first-child { margin-top: 0; }
.md > *:last-child { margin-bottom: 0; }
.md h1, .md h2, .md h3, .md h4 { line-height: 1.3; margin: 1.5em 0 .5em; letter-spacing: -.01em; }
.md h1 { font-size: 1.4em; } .md h2 { font-size: 1.22em; } .md h3 { font-size: 1.08em; }
.md p { margin: 0 0 1em; }
.md ul, .md ol { margin: 0 0 1em; padding-left: 1.35em; }
.md li { margin: .25em 0; }
.md li > p { margin: 0; }
.md a { color: var(--accent); }
.md blockquote {
  margin: 0 0 1em; padding: .1em 0 .1em 1em;
  border-left: 3px solid var(--line); color: var(--ink-2);
}
.md hr { border: 0; border-top: 1px solid var(--line); margin: 1.6em 0; }
.md table { border-collapse: collapse; width: 100%; margin: 0 0 1em; font-size: 13.5px; display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--line); padding: 7px 11px; text-align: left; }
.md th { background: var(--bg-3); font-weight: 600; }
.md code {
  font-family: var(--mono); font-size: .875em;
  background: var(--bg-3); padding: .15em .4em; border-radius: 5px;
}
.md pre { margin: 0 0 1em; }
.md pre code { display: block; padding: 0; background: none; border-radius: 0; font-size: 13px; line-height: 1.6; }

.code-block { position: relative; margin: 0 0 1.1em; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: #0b0d10; }
html[data-theme="light"] .code-block { background: #1b1f24; }
.code-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 8px 6px 12px; background: rgba(255,255,255,.04);
  border-bottom: 1px solid rgba(255,255,255,.07);
  font-size: 11.5px; color: #9aa2ad; font-family: var(--mono);
}
.code-copy { background: none; border: 0; color: #9aa2ad; cursor: pointer; padding: 3px 8px; border-radius: 6px; font-size: 11.5px; }
.code-copy:hover { background: rgba(255,255,255,.09); color: #fff; }
.code-block pre { margin: 0; overflow-x: auto; padding: 13px 14px; }
.code-block pre code { color: #dfe3e8; }

/* ── composer ───────────────────────────────────────────────────────── */
.composer-wrap { padding: 0 22px 16px; }
.composer {
  max-width: 780px; margin: 0 auto; display: flex; align-items: flex-end; gap: 8px;
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 15px; padding: 9px 9px 9px 15px;
}
.composer:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.composer textarea {
  flex: 1; background: none; border: 0; outline: none; resize: none;
  max-height: 210px; padding: 6px 0; line-height: 1.5;
}
.send {
  width: 34px; height: 34px; flex: none; border: 0; border-radius: 9px;
  background: var(--accent); color: #fff; cursor: pointer; display: grid; place-items: center;
}
.send:disabled { background: var(--bg-3); color: var(--ink-3); cursor: default; }
.composer-note { max-width: 780px; margin: 7px auto 0; font-size: 11.5px; color: var(--ink-3); text-align: center; }

/* ── admin ──────────────────────────────────────────────────────────── */
.admin { max-width: 1060px; margin: 0 auto; padding: 26px 22px 70px; }
.admin-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.admin-head h2 { margin: 0; font-size: 23px; letter-spacing: -.02em; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 22px; }
.stat { background: var(--bg-2); border: 1px solid var(--line); border-radius: 13px; padding: 15px 16px; }
.stat .k { font-size: 12px; color: var(--ink-3); }
.stat .v { font-size: 22px; font-weight: 600; margin-top: 4px; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.stat.pos .v { color: var(--good); }

.panel { background: var(--bg-2); border: 1px solid var(--line); border-radius: 14px; margin-bottom: 18px; overflow: hidden; }
.panel-head { padding: 15px 17px; border-bottom: 1px solid var(--line); }
.panel-head h3 { margin: 0; font-size: 15px; }
.panel-head p { margin: 4px 0 0; font-size: 12.5px; color: var(--ink-3); }
.markup { display: flex; align-items: center; gap: 14px; padding: 15px 17px; flex-wrap: wrap; }
.saved { color: var(--good); font-size: 13px; }

.table-wrap { overflow-x: auto; }
.ledger { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.ledger th, .ledger td { padding: 11px 14px; border-bottom: 1px solid var(--line-soft); text-align: left; white-space: nowrap; }
.ledger th { font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-3); font-weight: 500; }
.ledger tbody tr:last-child td { border-bottom: 0; }
.ledger .num { text-align: right; font-variant-numeric: tabular-nums; }
.ledger .owed-y { color: var(--accent); font-weight: 600; }
.ledger .owed-n { color: var(--ink-3); }
.pay { background: var(--accent); border: 0; color: #fff; border-radius: 8px; padding: 6px 12px; cursor: pointer; font-size: 12.5px; font-weight: 600; }
.pay:disabled { background: var(--bg-3); color: var(--ink-3); cursor: default; }
.muted { color: var(--ink-3); padding: 18px; font-size: 13.5px; }

/* ── narrow ─────────────────────────────────────────────────────────── */
@media (max-width: 820px) {
  .app { grid-template-columns: 1fr; }
  .only-narrow { display: block; }
  .sidebar {
    position: fixed; inset: 0 auto 0 0; width: 268px; z-index: 20;
    transform: translateX(-100%); transition: transform .2s ease;
  }
  .sidebar.open { transform: none; box-shadow: 0 0 60px rgba(0,0,0,.5); }
  .models button { padding: 6px 10px; font-size: 12.5px; }
  .thread, .composer, .composer-note { max-width: none; }
}

/* ── spending limit ─────────────────────────────────────────────────── */
.blocked {
  max-width: 780px; margin: 0 auto 10px; padding: 11px 15px;
  border: 1px solid var(--accent); background: var(--accent-soft);
  border-radius: 12px; font-size: 13.5px; color: var(--ink);
}
.pill {
  display: inline-block; padding: 2px 9px; border-radius: 999px;
  font-size: 11.5px; font-weight: 600;
}
.pill.ok { background: var(--line-soft); color: var(--ink-3); }
.pill.stop { background: var(--accent-soft); color: var(--accent); }
.row-actions { display: flex; gap: 6px; justify-content: flex-end; }
.mini {
  background: transparent; border: 1px solid var(--line); color: var(--ink-2);
  border-radius: 8px; padding: 5px 10px; cursor: pointer; font-size: 12.5px;
}
.mini:hover { border-color: var(--ink-3); color: var(--ink); }

/* ── attachments ────────────────────────────────────────────────────── */
.chips { max-width: 780px; margin: 0 auto 8px; display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--bg-3); border: 1px solid var(--line);
  border-radius: 999px; padding: 5px 6px 5px 11px; font-size: 12.5px; max-width: 100%;
}
.chip .n { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 200px; }
.chip .s { color: var(--ink-3); font-variant-numeric: tabular-nums; }
.chip .x {
  border: 0; background: none; color: var(--ink-3); cursor: pointer;
  padding: 1px 5px; border-radius: 50%; line-height: 1;
}
.chip .x:hover { color: var(--bad); background: var(--bg); }
.chip.bad { border-color: var(--bad); color: var(--bad); }

.attach {
  width: 32px; height: 32px; flex: none; border: 0; border-radius: 9px;
  background: transparent; color: var(--ink-3); cursor: pointer;
  display: grid; place-items: center; align-self: flex-end;
}
.attach:hover { color: var(--accent); background: var(--bg-3); }
.composer.dragging { border-color: var(--accent); background: var(--accent-soft); }
.files-note { font-size: 12px; color: var(--ink-3); margin-top: 6px; }
.msg.user .files { margin-top: 7px; display: flex; flex-wrap: wrap; gap: 5px; justify-content: flex-end; }
.msg.user .files span {
  font-size: 11.5px; color: var(--ink-3); background: var(--bg);
  border: 1px solid var(--line); border-radius: 999px; padding: 2px 9px;
}

.code-copy.failed { color: var(--bad); }

.tweak { font-size: 11px; color: var(--accent); }