:root {
  --bg: #f5f6f4;
  --surface: #ffffff;
  --surface-2: #f0f2ef;
  --border: #e1e4df;
  --text: #1c211e;
  --muted: #69726c;
  --accent: #1f9d5c;
  --accent-ink: #ffffff;
  --accent-soft: #e3f4ea;
  --warn: #b7791f;
  --warn-soft: #fbf1df;
  --danger: #c0392b;
  --danger-soft: #fbe6e3;
  --bubble-in: #ffffff;
  --bubble-bot: #dcf5e4;
  --bubble-human: #e3ecfb;
  --bubble-ext: #efeae2;
  --shadow: 0 1px 2px rgba(0,0,0,.05), 0 2px 8px rgba(0,0,0,.04);
  --radius: 12px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111513;
    --surface: #1a1f1c;
    --surface-2: #222824;
    --border: #2e3531;
    --text: #e6ebe7;
    --muted: #98a29b;
    --accent: #34c07a;
    --accent-ink: #0b1a12;
    --accent-soft: #173826;
    --warn: #e0a84a;
    --warn-soft: #3a2e17;
    --danger: #ef7466;
    --danger-soft: #3d1f1b;
    --bubble-in: #2b3430;
    --bubble-bot: #1d3a2a;
    --bubble-human: #1f2c42;
    --bubble-ext: #2f2a22;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
h1 { font-size: 22px; margin: 0 0 4px; letter-spacing: -.01em; }
h2 { font-size: 16px; margin: 0 0 12px; }
p { margin: 0 0 12px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 16px;
  padding: 10px 20px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 650; color: var(--text); white-space: nowrap; }
.logo { width: 22px; height: 22px; border-radius: 6px; background: var(--accent); display: inline-block; }
.crumbs { flex: 1; color: var(--muted); font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--text); }

main { max-width: 1100px; margin: 0 auto; padding: 24px 16px 64px; }

.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.stack > * + * { margin-top: 16px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.inst { display: flex; flex-direction: column; gap: 12px; }
.inst-head { display: flex; gap: 12px; align-items: center; }
.avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--surface-2); flex: none; object-fit: cover; display: grid; place-items: center; font-weight: 600; color: var(--muted); }
.inst-name { font-weight: 600; }
.inst-actions { display: flex; gap: 8px; margin-top: auto; flex-wrap: wrap; }

.badge { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; padding: 2px 9px; border-radius: 999px; background: var(--surface-2); color: var(--muted); white-space: nowrap; }
.badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.badge.ok { background: var(--accent-soft); color: var(--accent); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.bad { background: var(--danger-soft); color: var(--danger); }
.badge.plain::before { display: none; }

.btn {
  font: inherit; font-weight: 600; font-size: 14px;
  border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink);
  padding: 8px 14px; border-radius: 9px; cursor: pointer; display: inline-flex; align-items: center; gap: 6px;
}
.btn:hover { filter: brightness(1.05); }
.btn:disabled { opacity: .55; cursor: default; }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn.ghost:hover { background: var(--surface-2); }
.btn.danger { background: transparent; color: var(--danger); border-color: var(--danger); }
.btn.small { padding: 5px 10px; font-size: 13px; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; overflow-x: auto; }
.tab { padding: 10px 14px; color: var(--muted); font-weight: 600; border-bottom: 2px solid transparent; margin-bottom: -1px; white-space: nowrap; }
.tab.active { color: var(--text); border-color: var(--accent); }

label.field { display: block; }
.field > span { display: block; font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.field > small { display: block; color: var(--muted); font-size: 13px; margin-top: 4px; }
input[type=text], input[type=password], input[type=number], textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: 9px; padding: 9px 11px;
}
select.select, .lang-select {
  font: inherit; color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: 9px; padding: 8px 10px; cursor: pointer;
}
select.select { width: 100%; max-width: 280px; display: block; }
.lang-select { padding: 5px 8px; font-size: 13px; }
.login-top { display: flex; justify-content: space-between; align-items: flex-start; }
textarea { resize: vertical; min-height: 120px; line-height: 1.45; }
textarea.tall { min-height: 280px; }
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
.row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }

.switch { display: flex; align-items: center; gap: 12px; cursor: pointer; }
.switch input { appearance: none; width: 42px; height: 24px; border-radius: 99px; background: var(--border); position: relative; cursor: pointer; flex: none; margin: 0; transition: background .15s; }
.switch input::after { content: ""; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%; background: #fff; transition: left .15s; box-shadow: 0 1px 2px rgba(0,0,0,.2); }
.switch input:checked { background: var(--accent); }
.switch input:checked::after { left: 21px; }

.enable-bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.save-bar { position: sticky; bottom: 0; background: linear-gradient(transparent, var(--bg) 30%); padding: 16px 0 4px; display: flex; gap: 10px; justify-content: flex-end; }

.notice { border-radius: 10px; padding: 10px 14px; font-size: 14px; background: var(--warn-soft); color: var(--text); border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent); }
.notice.info { background: var(--surface-2); border-color: var(--border); }

.stats { display: flex; gap: 24px; flex-wrap: wrap; }
.stat b { display: block; font-size: 22px; }
.stat span { color: var(--muted); font-size: 13px; }

/* conversaciones */
.chats { display: grid; grid-template-columns: 340px 1fr; gap: 14px; align-items: start; }
.chat-list { padding: 6px; max-height: calc(100vh - 220px); overflow: auto; }
.chat-item { display: block; padding: 10px 12px; border-radius: 9px; color: var(--text); }
.chat-item:hover { background: var(--surface-2); }
.chat-item.active { background: var(--accent-soft); }
.chat-item .top { display: flex; justify-content: space-between; gap: 8px; }
.chat-item .name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-item .when { color: var(--muted); font-size: 12px; white-space: nowrap; }
.chat-item .last { color: var(--muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-item .badge { margin-top: 4px; }
.thread { display: flex; flex-direction: column; min-height: 400px; padding: 0; overflow: hidden; }
.thread-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.msgs { padding: 16px 18px; display: flex; flex-direction: column; gap: 6px; overflow: auto; max-height: calc(100vh - 300px); background: var(--surface-2); flex: 1; }
.msg { max-width: 78%; padding: 7px 11px 5px; border-radius: 10px; white-space: pre-wrap; word-wrap: break-word; box-shadow: var(--shadow); font-size: 14.5px; }
.msg .meta { font-size: 11px; color: var(--muted); text-align: right; margin-top: 2px; }
.msg.customer { background: var(--bubble-in); align-self: flex-start; border-top-left-radius: 3px; }
.msg.bot { background: var(--bubble-bot); align-self: flex-end; border-top-right-radius: 3px; }
.msg.human { background: var(--bubble-human); align-self: flex-end; border-top-right-radius: 3px; }
.msg.external { background: var(--bubble-ext); align-self: flex-end; border-top-right-radius: 3px; }
.msg.system { align-self: center; background: transparent; box-shadow: none; color: var(--muted); font-size: 12.5px; text-align: center; max-width: 90%; }
.msg .tag { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); display: block; }
.msg .handoff { display: block; margin-top: 4px; font-size: 12px; color: var(--warn); font-weight: 600; }

/* probar */
.tester { display: grid; grid-template-columns: 1fr 320px; gap: 14px; align-items: start; }
.composer { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--border); background: var(--surface); }
.composer input { flex: 1; }
.typing { align-self: flex-end; color: var(--muted); font-size: 13px; font-style: italic; }

/* login */
.login { max-width: 360px; margin: 12vh auto 0; }
.login .logo { width: 36px; height: 36px; border-radius: 10px; margin-bottom: 12px; }

.qr { display: grid; place-items: center; gap: 12px; text-align: center; }
.qr img { width: 260px; height: 260px; background: #fff; border-radius: 12px; padding: 8px; }

.modal-back { position: fixed; inset: 0; background: rgba(0,0,0,.45); display: grid; place-items: center; padding: 16px; z-index: 50; }
.modal { max-width: 440px; width: 100%; }

.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-size: 14px; z-index: 100; box-shadow: 0 4px 16px rgba(0,0,0,.2); max-width: calc(100% - 32px); }
.toast.error { background: var(--danger); color: #fff; }

.empty { text-align: center; color: var(--muted); padding: 40px 16px; }
.spinner { width: 18px; height: 18px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; display: inline-block; vertical-align: middle; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 800px) {
  .chats, .tester { grid-template-columns: 1fr; }
  .chat-list { max-height: 320px; }
  .msg { max-width: 90%; }
  .topbar { padding: 10px 16px; }
}