* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0b141a;
  --panel: #111b21;
  --panel2: #202c33;
  --border: #2a3942;
  --text: #e9edef;
  --muted: #8696a0;
  --green: #00a884;
  --green-dark: #008069;
  --red: #ef697a;
  --bubble1: #005c4b;
  --bubble2: #202c33;
}
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.error { color: var(--red); font-size: 13px; margin-top: 8px; }

.logo { font-size: 22px; font-weight: 700; }
.logo span { color: var(--green); }

/* login */
.center-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 16px;
  padding: 40px 36px; width: 100%; max-width: 360px; text-align: center;
}
.login-card .muted { margin: 4px 0 24px; font-size: 13px; }
.login-card input {
  width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--panel2); color: var(--text); font-size: 15px; outline: none;
}
.login-card input:focus { border-color: var(--green); }
.login-card button {
  width: 100%; margin-top: 12px; padding: 12px; border: 0; border-radius: 10px;
  background: var(--green); color: #04120f; font-size: 15px; font-weight: 700; cursor: pointer;
}
.login-card button:hover { background: var(--green-dark); color: var(--text); }

/* app layout */
header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 22px; background: var(--panel); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 5;
}
.header-right { display: flex; gap: 14px; align-items: center; }
main { max-width: 1100px; margin: 0 auto; padding: 22px; display: flex; flex-direction: column; gap: 20px; }

.card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 20px; }
.sessions { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 760px) { .sessions { grid-template-columns: 1fr; } }

.session-card { text-align: center; min-height: 300px; display: flex; flex-direction: column; }
.session-card h2 { font-size: 17px; margin-bottom: 4px; }
.session-card .body { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; padding: 12px 0; }
.session-card img.qr { width: 240px; height: 240px; border-radius: 10px; background: #fff; padding: 6px; }
.session-card .avatar {
  width: 72px; height: 72px; border-radius: 50%; background: var(--green);
  display: flex; align-items: center; justify-content: center; font-size: 34px;
}
.session-card .who { font-weight: 600; }

.badge {
  display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: var(--panel2); color: var(--muted); border: 1px solid var(--border);
}
.badge.ok { background: rgba(0,168,132,.15); color: var(--green); border-color: rgba(0,168,132,.4); }
.badge.warn { background: rgba(255,193,7,.12); color: #ffd45e; border-color: rgba(255,193,7,.35); }
.badge.err { background: rgba(239,105,122,.12); color: var(--red); border-color: rgba(239,105,122,.35); }

button { font: inherit; cursor: pointer; }
button.primary {
  background: var(--green); border: 0; color: #04120f; font-weight: 700;
  padding: 10px 20px; border-radius: 10px;
}
button.primary:hover { background: var(--green-dark); color: var(--text); }
button.primary:disabled { opacity: .45; cursor: not-allowed; }
button.danger { background: var(--red); border: 0; color: #1b0509; font-weight: 700; padding: 10px 20px; border-radius: 10px; }
button.ghost {
  background: transparent; border: 1px solid var(--border); color: var(--muted);
  padding: 7px 14px; border-radius: 9px;
}
button.ghost:hover { color: var(--text); border-color: var(--muted); }

/* conversation panel */
.conv-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.conv label { display: block; font-size: 12px; color: var(--muted); margin: 12px 0 4px; }
.conv textarea, .conv input {
  width: 100%; padding: 10px 12px; border-radius: 9px; border: 1px solid var(--border);
  background: var(--panel2); color: var(--text); font: inherit; outline: none; resize: vertical;
}
.conv textarea:focus, .conv input:focus { border-color: var(--green); }
.conv details { margin-top: 10px; }
.conv summary { cursor: pointer; color: var(--muted); font-size: 13px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
@media (max-width: 600px) { .grid2, .grid3 { grid-template-columns: 1fr; } }
.row { display: flex; gap: 10px; margin-top: 16px; }

/* transcript */
.transcript { margin-top: 18px; display: flex; flex-direction: column; gap: 8px; max-height: 480px; overflow-y: auto; padding: 4px; }
.bubble {
  max-width: 75%; padding: 9px 13px; border-radius: 12px; font-size: 14px; white-space: pre-wrap; word-break: break-word;
}
.bubble .meta { display: block; font-size: 11px; color: var(--muted); margin-top: 4px; }
.bubble.wa1 { align-self: flex-start; background: var(--bubble2); border-bottom-left-radius: 3px; }
.bubble.wa2 { align-self: flex-end; background: var(--bubble1); border-bottom-right-radius: 3px; }
.transcript .sys { text-align: center; font-size: 12px; color: var(--muted); }