:root {
  --bg: #f6f7f9; --panel: #ffffff; --border: #dfe3e8; --text: #1a1d21;
  --muted: #6b7280; --accent: #16a34a; --accent-text: #052e14;
  --user: #eef2ff; --warn: #b45309; --warn-soft: #fef3c7;
  --danger: #b91c1c; --danger-soft: #fee2e2;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a; --panel: #1c1f24; --border: #2c3138; --text: #e6e8ea;
    --muted: #9aa3ad; --accent: #4ade80; --accent-text: #052e14;
    --user: #1e2533; --warn: #fbbf24; --warn-soft: #2c2313;
    --danger: #f87171; --danger-soft: #2a1616;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: inherit; }

/* ---------- элементы форм ---------- */
fieldset { border: 1px solid var(--border); border-radius: 8px; padding: 12px; margin: 0 0 14px; }
legend { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; padding: 0 6px; }
label { display: block; font-size: 13px; margin-bottom: 10px; }
label span { display: block; color: var(--muted); margin-bottom: 4px; }
label:last-child { margin-bottom: 0; }
select, textarea,
input:not([type=checkbox]):not([type=radio]):not([type=submit]) {
  width: 100%; padding: 7px 9px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg); color: var(--text); font: inherit; font-size: 13px;
}
textarea { font-family: var(--mono); font-size: 12px; resize: vertical; min-height: 90px; }
.row { display: flex; gap: 10px; }
.row label { flex: 1; }
.check { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.check input { margin: 0; }
.hint { color: var(--muted); font-size: 12px; margin-top: 6px; }

button, .btn {
  display: inline-block; padding: 8px 18px; border: 0; border-radius: 6px;
  background: var(--accent); color: var(--accent-text);
  font: inherit; font-weight: 600; cursor: pointer; white-space: nowrap; text-decoration: none;
}
button:disabled { opacity: .5; cursor: default; }
button.ghost, .btn.ghost {
  background: transparent; color: var(--muted); border: 1px solid var(--border); font-weight: 400;
}
button.danger { background: var(--danger-soft); color: var(--danger); font-weight: 500; }
button.small { padding: 5px 12px; font-size: 13px; }

/* ---------- шапка ---------- */
header.bar {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 18px; background: var(--panel); border-bottom: 1px solid var(--border);
  font-size: 13px;
}
header.bar .grow { flex: 1; }
header.bar .who { color: var(--muted); }
header.bar .who b { color: var(--text); font-weight: 600; }
.badge {
  padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 600;
  background: var(--accent); color: var(--accent-text);
}

/* ---------- карточка по центру (вход, ожидание) ---------- */
.center { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 32px; max-width: 440px; width: 100%; text-align: center;
}
.card h1 { font-size: 20px; margin: 0 0 8px; }
.card p { color: var(--muted); font-size: 14px; margin: 0 0 20px; }
.card .btn { width: 100%; padding: 12px; }
.notice {
  margin-top: 18px; padding: 10px 12px; border-radius: 8px; font-size: 13px;
  background: var(--warn-soft); color: var(--warn); text-align: left;
}

/* ---------- чат ---------- */
.app { display: grid; grid-template-columns: 320px 1fr; height: calc(100vh - 43px); }
@media (max-width: 860px) { .app { grid-template-columns: 1fr; height: auto; } }
aside { background: var(--panel); border-right: 1px solid var(--border); padding: 20px; overflow-y: auto; }
aside h1 { font-size: 16px; margin: 0 0 4px; }
aside .sub { color: var(--muted); font-size: 13px; margin-bottom: 20px; }
main { display: flex; flex-direction: column; min-width: 0; height: 100%; }
@media (max-width: 860px) { main { height: 80vh; } }
#log { flex: 1; overflow-y: auto; padding: 24px; display: flex; flex-direction: column; gap: 16px; }
.msg { max-width: 780px; }
.msg .who { font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.msg .body {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 14px; white-space: pre-wrap; word-wrap: break-word;
}
.msg.user .body { background: var(--user); }
details { margin-top: 8px; }
details summary { cursor: pointer; font-size: 12px; color: var(--muted); }
details pre {
  margin: 8px 0 0; padding: 10px; background: var(--bg); border: 1px solid var(--border);
  border-radius: 6px; font-family: var(--mono); font-size: 12px; white-space: pre-wrap; color: var(--muted);
}
.stats { margin-top: 8px; font-family: var(--mono); font-size: 12px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 12px; }
.stats b { font-weight: 600; color: var(--text); }
.truncated { margin-top: 8px; padding: 8px 10px; border-radius: 6px; background: var(--warn-soft); color: var(--warn); font-size: 13px; }
.error { border-color: var(--warn); color: var(--warn); }
.empty { color: var(--muted); text-align: center; margin-top: 40px; font-size: 14px; }
form.composer { border-top: 1px solid var(--border); background: var(--panel); padding: 14px 24px; display: flex; gap: 10px; }
#prompt { flex: 1; min-height: 44px; max-height: 180px; font-family: inherit; font-size: 14px; }
.cursor::after { content: "▌"; color: var(--accent); animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- админка ---------- */
.wrap { max-width: 1000px; margin: 0 auto; padding: 28px 20px; }
.wrap h1 { font-size: 20px; margin: 0 0 4px; }
.wrap .sub { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
table { width: 100%; border-collapse: collapse; background: var(--panel); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
th, td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
th { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; font-weight: 500; }
tr:last-child td { border-bottom: 0; }
td.actions { text-align: right; white-space: nowrap; }
td.actions button { margin-left: 6px; }
.status { font-size: 12px; font-weight: 600; padding: 3px 9px; border-radius: 999px; }
.status.pending { background: var(--warn-soft); color: var(--warn); }
.status.approved { background: var(--accent); color: var(--accent-text); }
.status.blocked { background: var(--danger-soft); color: var(--danger); }
.mono { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.you { font-size: 11px; color: var(--muted); }

/* ---------- формы входа и регистрации ---------- */
.card form { text-align: left; margin-bottom: 16px; }
.card form label { margin-bottom: 12px; }
.card form input { padding: 9px 11px; font-size: 14px; }
.card button[type=submit] { width: 100%; padding: 11px; }
.card .alt {
  margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--border);
  font-size: 13px; color: var(--muted);
}
.card .alt .btn { width: 100%; margin-top: 10px; }
.formerror {
  margin-bottom: 14px; padding: 9px 11px; border-radius: 6px; font-size: 13px;
  background: var(--danger-soft); color: var(--danger); text-align: left;
}