:root {
  --bg: #eef1f4;
  --surface: #ffffff;
  --surface-2: #f6f8fa;
  --line: #dde3ea;
  --ink: #142233;
  --ink-2: #51606f;
  --ink-3: #8593a1;
  --navy: #0b3d6e;
  --navy-2: #0f4f8c;
  --accent: #0f9d76;
  --accent-soft: #e2f5ef;
  --warn: #c7811a;
  --warn-soft: #fdf3e2;
  --danger: #c23b3b;
  --bubble-in: #ffffff;
  --bubble-out: #dcf3e9;
  --bubble-agent: #dbe9f8;
  --chat-bg: #e9e4dc;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 34, 51, .06), 0 4px 16px rgba(16, 34, 51, .05);
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { font: 14px/1.45 'IBM Plex Sans', system-ui, sans-serif; color: var(--ink); background: var(--bg); }
button, input, select, textarea { font: inherit; color: inherit; }
.hidden { display: none !important; }
code { font-family: 'IBM Plex Mono', monospace; font-size: 12px; background: var(--surface-2); padding: 1px 5px; border-radius: 4px; }

.btn { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: var(--surface); padding: 7px 12px; border-radius: 8px; cursor: pointer; text-decoration: none; color: var(--ink); font-weight: 500; white-space: nowrap; }
.btn:hover { border-color: #b9c4cf; }
.btn.primary { background: var(--navy); border-color: var(--navy); color: #fff; }
.btn.primary:hover { background: var(--navy-2); }
.btn.green { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.ghost { background: transparent; border-color: transparent; color: var(--ink-2); }
.btn.small { padding: 4px 9px; font-size: 12.5px; }
.btn.danger { color: var(--danger); }
.btn:disabled { opacity: .5; cursor: default; }

.brand { display: flex; align-items: center; gap: 10px; }
.brand b { display: block; font-size: 14.5px; letter-spacing: -.01em; }
.brand small { color: var(--ink-3); font-size: 12px; }
.mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 8px; background: var(--navy); color: #fff; font-weight: 700; font-size: 13px; letter-spacing: .02em; }
.mark.small { width: 30px; height: 30px; font-size: 12px; }

/* Login */
.login { min-height: 100%; display: grid; place-items: center; padding: 16px; background: linear-gradient(160deg, #0b3d6e 0%, #0f4f8c 55%, #0f9d76 140%); }
.login-card { width: 100%; max-width: 360px; background: var(--surface); border-radius: 14px; padding: 28px; display: grid; gap: 14px; box-shadow: 0 20px 60px rgba(0,0,0,.25); }
.login-card .brand { margin-bottom: 6px; }
label { display: grid; gap: 5px; font-size: 12.5px; color: var(--ink-2); font-weight: 500; }
input, select, textarea { border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; background: var(--surface); outline: none; }
input:focus, select:focus, textarea:focus { border-color: var(--navy-2); box-shadow: 0 0 0 3px rgba(15, 79, 140, .12); }
.error { color: var(--danger); margin: 0; min-height: 18px; font-size: 13px; }

/* App shell */
.app { height: 100%; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; gap: 18px; padding: 10px 18px; background: var(--surface); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.tabs { display: flex; gap: 2px; flex: 1; }
.tabs button { border: 0; background: none; padding: 8px 12px; border-radius: 8px; cursor: pointer; color: var(--ink-2); font-weight: 500; }
.tabs button.active { background: var(--surface-2); color: var(--navy); font-weight: 600; }
.pill { display: inline-block; min-width: 18px; padding: 0 6px; border-radius: 9px; background: var(--accent); color: #fff; font-size: 11px; font-weight: 700; text-align: center; }
.pill:empty { display: none; }
.top-actions { display: flex; align-items: center; gap: 8px; }
.me { color: var(--ink-2); font-size: 13px; }
.badge { font-size: 11px; font-weight: 700; padding: 3px 8px; border-radius: 6px; letter-spacing: .04em; }
.badge.warn { background: var(--warn-soft); color: var(--warn); }

.stats { display: flex; gap: 10px; padding: 12px 18px 0; overflow-x: auto; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 14px; min-width: 120px; }
.stat b { display: block; font-size: 20px; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.stat span { color: var(--ink-3); font-size: 12px; }
.stat.hot b { color: var(--accent); }
.stat.alert b { color: var(--warn); }

.tab { flex: 1; min-height: 0; padding: 12px 18px 18px; }

/* Chats layout */
.chats { display: grid; grid-template-columns: 320px 1fr 300px; gap: 12px; }
.list-pane, .thread-pane, .detail-pane { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); min-height: 0; display: flex; flex-direction: column; overflow: hidden; }
.filters { padding: 10px; border-bottom: 1px solid var(--line); display: grid; gap: 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 5px; }
.chips button { border: 1px solid var(--line); background: var(--surface); border-radius: 14px; padding: 3px 10px; font-size: 12px; cursor: pointer; color: var(--ink-2); }
.chips button.on { background: var(--navy); border-color: var(--navy); color: #fff; }
.conv-list { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; }
.conv-list li { padding: 10px 12px; border-bottom: 1px solid var(--line); cursor: pointer; display: grid; grid-template-columns: 36px 1fr auto; gap: 10px; align-items: start; }
.conv-list li:hover { background: var(--surface-2); }
.conv-list li.sel { background: #e8f0f9; }
.avatar { width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; background: #d4dfeb; color: var(--navy); font-weight: 700; font-size: 13px; }
.conv-name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.conv-sub { color: var(--ink-3); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.conv-last { color: var(--ink-2); font-size: 12.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }
.conv-meta { text-align: right; font-size: 11px; color: var(--ink-3); display: grid; gap: 4px; justify-items: end; }
.tag { display: inline-block; font-size: 10.5px; font-weight: 600; padding: 1px 7px; border-radius: 5px; background: var(--surface-2); color: var(--ink-2); }
.tag.agent { background: var(--accent-soft); color: var(--accent); }
.tag.queue { background: var(--warn-soft); color: var(--warn); }
.tag.closed { background: #eceff2; color: var(--ink-3); }
.empty { margin: auto; color: var(--ink-3); padding: 30px; text-align: center; }

.thread-head { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.thread-head .who { flex: 1; min-width: 0; }
.thread-head .who b { display: block; }
.thread-head .who small { color: var(--ink-3); }
.thread { flex: 1; overflow-y: auto; padding: 16px; background: var(--chat-bg); display: flex; flex-direction: column; gap: 6px; }
.msg { max-width: 72%; padding: 7px 10px 5px; border-radius: 8px; box-shadow: 0 1px 1px rgba(0,0,0,.08); white-space: pre-wrap; word-wrap: break-word; font-size: 13.5px; }
.msg.in { align-self: flex-start; background: var(--bubble-in); border-top-left-radius: 2px; }
.msg.out { align-self: flex-end; background: var(--bubble-out); border-top-right-radius: 2px; }
.msg.agent { background: var(--bubble-agent); }
.msg .meta { display: block; text-align: right; font-size: 10.5px; color: var(--ink-3); margin-top: 2px; }
.msg .who { display: block; font-size: 11px; font-weight: 600; color: var(--navy-2); margin-bottom: 2px; }
.msg.failed { border: 1px solid var(--danger); }
.sys { align-self: center; background: rgba(255,255,255,.75); color: var(--ink-2); font-size: 11.5px; padding: 3px 10px; border-radius: 6px; }
.window-warn { background: var(--warn-soft); color: #7a4d0b; font-size: 12.5px; padding: 8px 14px; border-top: 1px solid #f0d9ac; }
.composer { display: flex; gap: 8px; padding: 10px; border-top: 1px solid var(--line); align-items: flex-end; }
.composer textarea { flex: 1; resize: none; min-height: 40px; max-height: 140px; }

.detail-pane { overflow-y: auto; }
.section { padding: 14px; border-bottom: 1px solid var(--line); display: grid; gap: 8px; }
.section h3 { margin: 0; font-size: 11.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); }
.kv { display: grid; grid-template-columns: 82px 1fr; gap: 4px 8px; font-size: 13px; }
.kv span { color: var(--ink-3); }
.kv b { font-weight: 500; word-break: break-word; }
.row { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.interest { font-size: 12.5px; display: flex; justify-content: space-between; gap: 8px; }
.interest small { color: var(--ink-3); }
.enq { font-size: 12.5px; padding: 8px; border-radius: 8px; background: var(--surface-2); }
.enq b { display: block; }

/* Panels / tables */
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; height: 100%; display: flex; flex-direction: column; min-height: 0; }
.panel h2 { margin: 0 0 8px; font-size: 16px; }
.panel-head { display: flex; justify-content: space-between; align-items: center; }
.hint { color: var(--ink-2); font-size: 13px; margin: 4px 0 12px; max-width: 900px; }
.table-wrap { overflow: auto; flex: 1; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th { text-align: left; font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-3); font-weight: 600; padding: 8px 10px; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--surface); }
td { padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:hover td { background: var(--surface-2); }

/* Modal + toast */
.modal { position: fixed; inset: 0; background: rgba(12, 24, 38, .45); display: grid; place-items: center; padding: 16px; z-index: 50; }
.modal-card { background: var(--surface); border-radius: 12px; padding: 20px; width: 100%; max-width: 520px; max-height: 90vh; overflow: auto; display: grid; gap: 12px; }
.modal-card h3 { margin: 0; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.cat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 12px; font-size: 12.5px; max-height: 180px; overflow: auto; border: 1px solid var(--line); border-radius: 8px; padding: 8px; }
.cat-grid label { display: flex; flex-direction: row; gap: 6px; align-items: center; font-weight: 400; color: var(--ink); }
.toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%) translateY(80px); background: var(--ink); color: #fff; padding: 9px 16px; border-radius: 8px; font-size: 13px; transition: transform .2s; z-index: 60; max-width: 90vw; }
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.err { background: var(--danger); }

/* Simulator */
.sim-wrap { display: flex; gap: 24px; height: 100%; min-height: 0; flex-wrap: wrap; }
.phone { width: 380px; max-width: 100%; height: 100%; min-height: 520px; display: flex; flex-direction: column; border-radius: 18px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); background: var(--chat-bg); }
.phone-head { display: flex; gap: 10px; align-items: center; padding: 10px 12px; background: #075e54; color: #fff; }
.phone-head small { display: block; opacity: .8; font-size: 11.5px; }
.phone-body { flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 6px; }
.phone-input { display: flex; gap: 6px; padding: 8px; background: #f0f0f0; }
.phone-input input { flex: 1; border-radius: 18px; }
.wa-btns { display: grid; gap: 4px; margin-top: 6px; }
.wa-btns button { border: 0; border-top: 1px solid #e3e3e3; background: transparent; color: #027eb5; padding: 7px 4px 3px; cursor: pointer; font-weight: 500; }
.wa-list { margin-top: 6px; display: grid; gap: 4px; }
.wa-list .sec { font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: #0a7c66; margin-top: 4px; }
.wa-list button { text-align: left; border: 1px solid #e5e5e5; background: #fafafa; border-radius: 6px; padding: 5px 8px; cursor: pointer; }
.wa-list button small { display: block; color: var(--ink-3); font-size: 11px; }
.wa-flow { display: grid; gap: 6px; margin-top: 6px; }
.sim-side { flex: 1; min-width: 260px; max-width: 420px; display: grid; gap: 12px; align-content: start; }
.sim-side h2 { margin: 0; font-size: 16px; }

@media (max-width: 1100px) {
  .chats { grid-template-columns: 280px 1fr; }
  .detail-pane { display: none; }
}
@media (max-width: 720px) {
  .tab { padding: 10px; }
  .chats { grid-template-columns: 1fr; }
  .chats.open .list-pane { display: none; }
  .chats:not(.open) .thread-pane { display: none; }
  .topbar { gap: 10px; padding: 10px; }
  .tabs { order: 3; width: 100%; overflow-x: auto; }
  .me { display: none; }
  .grid2 { grid-template-columns: 1fr; }
}