:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --panel-2: #f8fafc;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --brand: #16a34a;
  --brand-ink: #ffffff;
  --brand-soft: #dcfce7;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
  --warn: #b45309;
  --warn-soft: #fef3c7;
  --info-soft: #e0f2fe;
  --bubble-me: #d9fdd3;
  --bubble-them: #ffffff;
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 4px 16px rgba(15, 23, 42, .06);
  --radius: 12px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1117;
    --panel: #111a22;
    --panel-2: #0f1720;
    --border: #1f2c38;
    --text: #e6edf3;
    --muted: #8b9bab;
    --brand: #22c55e;
    --brand-ink: #04200f;
    --brand-soft: #0f2e1c;
    --danger: #f87171;
    --danger-soft: #3b1414;
    --warn: #fbbf24;
    --warn-soft: #3a2c0b;
    --info-soft: #0c2a3b;
    --bubble-me: #134d37;
    --bubble-them: #1a2632;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--text); font: 14px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--brand); }
h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 16px; margin: 0 0 12px; }
h3 { font-size: 14px; margin: 0 0 8px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.mono { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; word-break: break-all; }
.boot { display: grid; place-items: center; height: 100vh; color: var(--muted); }

/* ---------- layout ---------- */
.shell { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.side { background: var(--panel); border-right: 1px solid var(--border); padding: 16px 12px; display: flex; flex-direction: column; gap: 4px; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; padding: 4px 8px 16px; }
.brand img { width: 28px; height: 28px; }
.nav-label { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: 14px 10px 4px; }
.nav a { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 8px; color: var(--text); text-decoration: none; }
.nav a:hover { background: var(--panel-2); }
.nav a.active { background: var(--brand-soft); color: var(--brand); font-weight: 600; }
.side-foot { margin-top: auto; padding: 12px 8px 0; border-top: 1px solid var(--border); }
.main { padding: 24px 28px 48px; min-width: 0; }
.head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.btn.menu-btn { display: none; margin-bottom: 8px; }

/* ---------- componentes ---------- */
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cards { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.stack { display: flex; flex-direction: column; gap: 12px; }
.spacer { flex: 1; }
.btn { appearance: none; border: 1px solid var(--border); background: var(--panel); color: var(--text); padding: 8px 14px; border-radius: 8px; font: inherit; font-weight: 500; cursor: pointer; display: inline-flex; align-items: center; gap: 6px; }
.btn:hover { background: var(--panel-2); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.primary { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); }
.btn.primary:hover { filter: brightness(1.05); }
.btn.danger { color: var(--danger); border-color: var(--danger); }
.btn.danger:hover { background: var(--danger-soft); }
.btn.sm { padding: 5px 10px; font-size: 13px; }
.btn.link { border: 0; background: none; color: var(--brand); padding: 4px; }
label { display: flex; flex-direction: column; gap: 4px; font-weight: 500; font-size: 13px; }
label.inline { flex-direction: row; align-items: center; gap: 6px; font-weight: 400; }
input, select, textarea { font: inherit; color: var(--text); background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px; padding: 9px 11px; width: 100%; }
input[type=checkbox] { width: auto; }
textarea { min-height: 90px; resize: vertical; }
input:focus, select:focus, textarea:focus, .btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 1px; }
.badge { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; padding: 2px 10px; border-radius: 999px; background: var(--panel-2); border: 1px solid var(--border); }
.badge::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.badge.connected { background: var(--brand-soft); color: var(--brand); border-color: transparent; }
.badge.connected::before { background: var(--brand); }
.badge.connecting { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.badge.connecting::before { background: var(--warn); }
.badge.disconnected::before { background: var(--danger); }
.alert { padding: 12px 14px; border-radius: 10px; background: var(--info-soft); }
.alert.warn { background: var(--warn-soft); }
.alert.error { background: var(--danger-soft); color: var(--danger); }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table th { font-size: 12px; color: var(--muted); font-weight: 600; }
.empty { text-align: center; color: var(--muted); padding: 32px 12px; }
.avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; background: var(--panel-2); flex: none; display: grid; place-items: center; font-weight: 700; color: var(--muted); }
.progress { height: 8px; background: var(--panel-2); border-radius: 99px; overflow: hidden; border: 1px solid var(--border); }
.progress > div { height: 100%; background: var(--brand); }
.stack > p, .stack > h2, .stack > h3 { margin: 0; }
.kv { margin: 0; display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 16px; }
.tabs button { background: none; border: 0; padding: 10px 14px; font: inherit; color: var(--muted); cursor: pointer; border-bottom: 2px solid transparent; }
.tabs button.active { color: var(--brand); border-bottom-color: var(--brand); font-weight: 600; }

/* ---------- login ---------- */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login .card { width: 100%; max-width: 380px; }
.login .brand { justify-content: center; padding-bottom: 8px; font-size: 20px; }

/* ---------- conexão ---------- */
.qr { display: grid; place-items: center; background: #fff; border-radius: 12px; padding: 12px; width: 280px; max-width: 100%; }
.qr img { width: 256px; height: 256px; image-rendering: pixelated; }
.paircode { font: 700 34px/1 ui-monospace, Consolas, monospace; letter-spacing: .15em; padding: 16px 20px; background: var(--panel-2); border: 1px dashed var(--brand); border-radius: 12px; text-align: center; }

/* ---------- conversas ---------- */
.chat { display: grid; grid-template-columns: 320px 1fr; height: calc(100vh - 140px); min-height: 420px; padding: 0; overflow: hidden; }
.chat-list { border-right: 1px solid var(--border); overflow-y: auto; }
.chat-item { display: flex; gap: 10px; padding: 10px 12px; border-bottom: 1px solid var(--border); cursor: pointer; align-items: center; background: none; border-left: 0; border-right: 0; border-top: 0; width: 100%; text-align: left; font: inherit; color: inherit; }
.chat-item:hover, .chat-item.active { background: var(--panel-2); }
.chat-item .meta { min-width: 0; flex: 1; }
.chat-item .name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-item .last { color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.unread { background: var(--brand); color: var(--brand-ink); border-radius: 99px; font-size: 11px; font-weight: 700; padding: 1px 7px; }
.conv { display: flex; flex-direction: column; min-width: 0; }
.conv-head { padding: 12px 16px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 10px; }
.msgs { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 6px; background: var(--panel-2); }
.msg { max-width: 72%; padding: 7px 10px 5px; border-radius: 10px; background: var(--bubble-them); box-shadow: var(--shadow); white-space: pre-wrap; word-wrap: break-word; }
.msg.me { align-self: flex-end; background: var(--bubble-me); }
.msg .when { display: block; text-align: right; font-size: 11px; color: var(--muted); margin-top: 2px; }
.msg .type { font-size: 12px; color: var(--muted); font-style: italic; }
.composer { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--border); }
.composer textarea { min-height: 42px; height: 42px; }

/* ---------- modal / toast ---------- */
.modal-bg { position: fixed; inset: 0; background: rgba(2, 6, 23, .55); display: grid; place-items: center; padding: 16px; z-index: 50; }
.modal { background: var(--panel); border-radius: 14px; padding: 22px; width: 100%; max-width: 520px; box-shadow: 0 20px 60px rgba(0, 0, 0, .35); max-height: 90vh; overflow-y: auto; }
.toasts { position: fixed; right: 16px; bottom: 16px; display: flex; flex-direction: column; gap: 8px; z-index: 60; }
.toast { background: var(--text); color: var(--bg); padding: 10px 14px; border-radius: 10px; box-shadow: var(--shadow); max-width: 360px; }
.toast.error { background: var(--danger); color: #fff; }

/* ---------- responsivo ---------- */
@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .side { position: fixed; inset: 0 auto 0 0; width: 260px; z-index: 40; transform: translateX(-100%); transition: transform .2s; }
  .side.open { transform: none; box-shadow: 0 0 40px rgba(0, 0, 0, .3); }
  .btn.menu-btn { display: inline-flex; }
  .main { padding: 16px; }
  .grid.cols-2 { grid-template-columns: 1fr; }
  .chat { grid-template-columns: 1fr; height: auto; }
  .chat-list { max-height: 260px; border-right: 0; border-bottom: 1px solid var(--border); }
  .msgs { min-height: 360px; }
}
a.btn { text-decoration: none; }
/* Tabelas largas rolam dentro do card no celular, sem estourar a página. */
.card:has(> .table) { overflow-x: auto; }
.table td .row { flex-wrap: nowrap; }