:root {
  --bg: #f3f6f4;
  --card: #fff;
  --text: #15231c;
  --muted: #5c6b63;
  --line: #d7e0db;
  --accent: #1f6b4a;
  --danger: #b42318;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.45 "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  background: linear-gradient(160deg, #e8f2ec, var(--bg) 40%, #eef2f0);
  min-height: 100vh;
}
body.auth {
  display: grid;
  place-items: center;
  padding: 24px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px;
  width: min(400px, 100%);
  display: grid;
  gap: 12px;
  box-shadow: 0 12px 40px rgba(21, 35, 28, 0.08);
}
label { display: grid; gap: 6px; font-weight: 600; }
input, select, button, textarea {
  font: inherit;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
}
button {
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  font-weight: 600;
}
button.secondary { background: #fff; color: var(--text); border: 1px solid var(--line); }
button.danger { background: var(--danger); }
.muted { color: var(--muted); margin: 0; }
.err { color: var(--danger); margin: 0; }
.top {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
}
.nav { display: flex; gap: 8px; flex-wrap: wrap; }
.nav a {
  text-decoration: none;
  color: var(--text);
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
}
.nav a.active { border-color: var(--line); background: #fff; font-weight: 600; }
.wrap { padding: 20px; max-width: 1100px; margin: 0 auto; display: grid; gap: 16px; }
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
}
th, td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; }
th { background: #f7faf8; font-size: 13px; color: var(--muted); }
.badge {
  display: inline-block;
  min-width: 22px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--danger);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}
.chat-layout { display: grid; grid-template-columns: 280px 1fr; gap: 12px; min-height: 60vh; }
.threads, .messages {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: auto;
}
.thread {
  padding: 12px;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}
.thread.active { background: #eef7f2; }
.bubble { margin: 10px 12px; padding: 10px 12px; border-radius: 12px; max-width: 75%; }
.bubble.user { background: #eef2f0; }
.bubble.staff { background: #dff3e8; margin-left: auto; }
.composer { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--line); }
@media (max-width: 800px) {
  .chat-layout { grid-template-columns: 1fr; }
}