:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel2: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #22d3ee;
  --good: #4ade80;
  --bad: #f87171;
  --warn: #fbbf24;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; background: var(--bg); color: var(--text); height: 100vh; }
.hidden { display: none !important; }

.login { display: flex; align-items: center; justify-content: center; height: 100vh; }
.login-box { background: var(--panel); padding: 32px; border-radius: 14px; width: 320px; text-align: center; }
.login-box h1 { font-size: 20px; color: var(--accent); margin-bottom: 4px; }
.login-box p { color: var(--muted); font-size: 13px; margin-bottom: 20px; }
.login-box input { width: 100%; background: var(--panel2); color: var(--text); border: 1px solid #475569; border-radius: 8px; padding: 11px; margin-bottom: 12px; font-size: 14px; }
.err { color: var(--bad); font-size: 13px; margin-top: 8px; min-height: 18px; }

#app { display: flex; height: 100vh; }
.sidebar { width: 250px; background: var(--panel); padding: 20px 16px; display: flex; flex-direction: column; gap: 16px; }
.brand h1 { font-size: 18px; color: var(--accent); }
.brand p { color: var(--muted); font-size: 12px; margin-top: 2px; }
nav { display: flex; flex-direction: column; gap: 6px; flex: 1; }
.nav-btn { background: transparent; border: none; color: var(--muted); text-align: left; padding: 10px 12px; border-radius: 8px; cursor: pointer; font-size: 14px; }
.nav-btn:hover { background: var(--panel2); color: var(--text); }
.nav-btn.active { background: var(--panel2); color: var(--accent); font-weight: 600; }
.license { background: var(--panel2); padding: 10px; border-radius: 8px; font-size: 12px; color: var(--muted); }
.btn.danger { background: var(--bad); color: #fff; }
.btn.small { padding: 8px 12px; font-size: 13px; }

main { flex: 1; overflow-y: auto; padding: 28px 36px; }
.tab { display: none; }
.tab.active { display: block; }
h2 { margin-bottom: 16px; }
h3 { margin: 24px 0 8px; }
.hint { color: var(--muted); font-size: 13px; margin-top: 6px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.card { background: var(--panel); border-radius: 10px; padding: 16px; }
.card .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.card .value { font-size: 18px; font-weight: 700; margin-top: 6px; }
code { background: var(--panel2); padding: 6px 10px; border-radius: 6px; font-size: 13px; display: inline-block; }
.qr-wrap { margin-top: 20px; text-align: center; }
.qr-wrap img { width: 260px; height: 260px; background: #fff; padding: 8px; border-radius: 12px; }
textarea { width: 100%; min-height: 120px; background: var(--panel); color: var(--text); border: 1px solid var(--panel2); border-radius: 8px; padding: 12px; margin-top: 12px; font-family: inherit; }
.row { display: flex; gap: 12px; align-items: center; margin-top: 16px; }
.btn { background: var(--accent); color: #042; border: none; padding: 10px 18px; border-radius: 8px; font-weight: 700; cursor: pointer; font-size: 14px; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.4px; }
.field input, .field select { background: var(--panel); color: var(--text); border: 1px solid var(--panel2); border-radius: 8px; padding: 10px; font-size: 14px; }
.log { background: #0b1120; border: 1px solid var(--panel2); border-radius: 8px; padding: 14px; font-size: 12px; line-height: 1.6; white-space: pre-wrap; max-height: 60vh; overflow-y: auto; color: #a5f3fc; }

.chat-layout { display: grid; grid-template-columns: 320px 1fr; gap: 16px; margin-top: 16px; height: calc(100vh - 180px); }
.chat-list { background: var(--panel); border-radius: 10px; overflow-y: auto; padding: 8px; }
.chat-open-row { display: flex; gap: 6px; margin-bottom: 8px; position: sticky; top: 0; background: var(--panel); padding: 6px 0; z-index: 1; }
.chat-open-row input { flex: 1; background: var(--panel2); color: var(--text); border: 1px solid #475569; border-radius: 8px; padding: 8px; font-size: 13px; min-width: 0; }
.chat-item { padding: 10px 12px; border-radius: 8px; cursor: pointer; margin-bottom: 4px; }
.chat-item:hover { background: var(--panel2); }
.chat-item.active { background: var(--panel2); }
.chat-item-top { display: flex; justify-content: space-between; align-items: baseline; }
.chat-name { font-weight: 600; font-size: 14px; }
.chat-time { color: var(--muted); font-size: 11px; }
.chat-item-sub { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-top: 4px; }
.chat-preview { color: var(--muted); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.badge { border-radius: 10px; padding: 2px 8px; font-size: 11px; font-weight: 700; }
.badge-unread { background: var(--accent); color: #042; }
.badge-manual { background: var(--warn); color: #3b2f00; }
.badge-auto { background: var(--good); color: #042; }

.chat-thread { display: flex; flex-direction: column; background: var(--panel); border-radius: 10px; overflow: hidden; }
.chat-head { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--panel2); background: var(--panel2); font-size: 13px; }
.chat-messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.bubble { max-width: 70%; padding: 8px 12px; border-radius: 12px; font-size: 14px; line-height: 1.45; }
.bubble.theirs { background: var(--panel2); align-self: flex-start; }
.bubble.mine { background: var(--accent); color: #042; align-self: flex-end; }
.bubble-time { font-size: 10px; opacity: 0.7; margin-top: 4px; text-align: right; }
.st-sent { color: var(--accent); font-weight: 700; }
.st-read { color: #60a5fa; font-weight: 700; }
.chat-input-row { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--panel2); }
.chat-input-row input { flex: 1; background: var(--panel2); color: var(--text); border: 1px solid #475569; border-radius: 8px; padding: 11px; font-size: 14px; }