:root {
  --bg: #f4f6f9; --panel: #ffffff; --text: #1b2430; --muted: #6b7686; --line: #e3e8ef;
  --accent: #0b6bcb; --accent-soft: #e6f0fb; --ok: #1a8f4c; --ok-soft: #e4f5ea;
  --warn: #b26b00; --warn-soft: #fff3dc; --bad: #c62828; --bad-soft: #fde8e8;
  --bubble-in: #ffffff; --bubble-out: #dcf6e3; --chat-bg: #eef1f4;
  --radius: 10px; --shadow: 0 1px 3px rgba(16, 24, 40, .08);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f141a; --panel: #171e26; --text: #e6ebf1; --muted: #93a0b0; --line: #26303b;
    --accent: #4c9bf0; --accent-soft: #15283d; --ok: #4cc27c; --ok-soft: #15301f;
    --warn: #f0b04c; --warn-soft: #33270f; --bad: #f07272; --bad-soft: #3a1717;
    --bubble-in: #1f2730; --bubble-out: #16392a; --chat-bg: #12181f;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); font-size: 15px; }
a { color: var(--accent); }
button, input, select, textarea { font: inherit; color: inherit; }
input, select, textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel);
}
textarea { resize: vertical; min-height: 70px; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
input[type=checkbox] { width: auto; }
label { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 4px; }
label.check { display: flex; gap: 8px; align-items: center; color: var(--text); font-size: 15px; }
.btn {
  border: 1px solid var(--line); background: var(--panel); padding: 8px 14px; border-radius: 8px;
  cursor: pointer; white-space: nowrap;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.danger { color: var(--bad); }
.btn.sm { padding: 4px 10px; font-size: 13px; }
.btn:disabled { opacity: .5; cursor: default; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.grow { flex: 1; min-width: 0; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: 12px; background: var(--accent-soft); color: var(--accent); }
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.bad { background: var(--bad-soft); color: var(--bad); }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); margin-bottom: 16px; }
.card h3 { margin: 0 0 8px; font-size: 16px; }
h2 { margin: 0 0 16px; font-size: 20px; }

/* Layout */
#app { display: flex; height: 100%; }
nav.side { width: 210px; background: var(--panel); border-right: 1px solid var(--line); display: flex; flex-direction: column; padding: 14px 10px; }
nav.side .brand { font-weight: 700; font-size: 17px; padding: 4px 10px 16px; }
nav.side .brand span { color: var(--accent); }
nav.side a { display: flex; gap: 10px; align-items: center; padding: 9px 10px; border-radius: 8px; text-decoration: none; color: var(--text); }
nav.side a.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
nav.side a .count { margin-left: auto; background: var(--accent); color: #fff; border-radius: 99px; font-size: 11px; padding: 1px 7px; }
nav.side .foot a { display: inline; padding: 0; color: var(--accent); }
nav.side .foot { margin-top: auto; font-size: 13px; color: var(--muted); padding: 10px; }
main { flex: 1; overflow: auto; padding: 20px; min-width: 0; }
main.full { padding: 0; overflow: hidden; display: flex; }

/* Chats */
.chat-list { width: 320px; border-right: 1px solid var(--line); background: var(--panel); display: flex; flex-direction: column; }
.chat-list .top { padding: 12px; border-bottom: 1px solid var(--line); display: flex; gap: 8px; }
.chat-list .items { overflow: auto; flex: 1; }
.chat-item { padding: 11px 14px; border-bottom: 1px solid var(--line); cursor: pointer; display: flex; gap: 10px; }
.chat-item:hover, .chat-item.active { background: var(--accent-soft); }
.chat-item .name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-item .last { font-size: 13px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-item .meta { text-align: right; font-size: 12px; color: var(--muted); display: flex; flex-direction: column; gap: 4px; align-items: flex-end; }
.unread { background: var(--ok); color: #fff; border-radius: 99px; font-size: 11px; padding: 1px 7px; }
.chat-view { flex: 1; display: flex; flex-direction: column; min-width: 0; background: var(--chat-bg); }
.head-name div { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-head { padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--line); display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.msgs { flex: 1; overflow: auto; padding: 16px; display: flex; flex-direction: column; gap: 6px; }
.msg { max-width: min(560px, 80%); padding: 7px 10px 5px; border-radius: 10px; background: var(--bubble-in); box-shadow: var(--shadow); overflow-wrap: anywhere; }
.msg .txt { white-space: pre-wrap; }
.msg.out { align-self: flex-end; background: var(--bubble-out); }
.msg .info { font-size: 11px; color: var(--muted); text-align: right; margin-top: 3px; }
.msg.failed { border: 1px solid var(--bad); }
.msg img { max-width: 260px; border-radius: 6px; display: block; }
.day { align-self: center; font-size: 12px; color: var(--muted); background: var(--panel); padding: 2px 10px; border-radius: 99px; margin: 6px 0; }
.composer { padding: 10px; background: var(--panel); border-top: 1px solid var(--line); }
.composer textarea { min-height: 42px; max-height: 160px; }
.empty { margin: auto; color: var(--muted); text-align: center; padding: 30px; }

/* Tablas */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
tr.click { cursor: pointer; }
tr.click:hover td { background: var(--accent-soft); }
.table-wrap { overflow-x: auto; }

/* Modal y avisos */
.modal-bg { position: fixed; inset: 0; background: rgba(0, 0, 0, .45); display: flex; align-items: center; justify-content: center; padding: 16px; z-index: 50; }
.modal { background: var(--panel); border-radius: 12px; width: min(560px, 100%); max-height: 92vh; overflow: auto; padding: 20px; }
.modal h3 { margin-top: 0; }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 18px; border-radius: 8px; z-index: 60; max-width: 90vw; }
.toast.bad { background: var(--bad); color: #fff; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 6px 14px; font-size: 14px; }
.kv code { word-break: break-all; }
code { background: var(--accent-soft); padding: 1px 5px; border-radius: 4px; font-size: 13px; }

/* Login */
.login { margin: auto; width: min(360px, 92vw); }

/* Móvil */
@media (max-width: 760px) {
  #app { flex-direction: column-reverse; }
  nav.side { width: 100%; flex-direction: row; padding: 4px; border-right: 0; border-top: 1px solid var(--line); overflow-x: auto; }
  nav.side .brand, nav.side .foot { display: none; }
  nav.side a { flex-direction: column; gap: 2px; font-size: 11px; padding: 6px 8px; flex: 1; justify-content: center; }
  nav.side a .count { margin: 0; }
  nav.side a .lbl { font-size: 0; }
  nav.side a .lbl::after { content: attr(data-short); font-size: 11px; }
  .hide-mobile { display: none; }
  .chat-head { padding: 8px 10px; flex-wrap: nowrap; gap: 6px; }
  main { padding: 14px; }
  .chat-list { width: 100%; border-right: 0; }
  main.full.has-chat .chat-list { display: none; }
  main.full:not(.has-chat) .chat-view { display: none; }
  .grid2 { grid-template-columns: 1fr; }
  .msg { max-width: 88%; }
}
@media (min-width: 761px) { .only-mobile { display: none !important; } }