* { box-sizing: border-box; }
body {
  font-family: -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: #0f1115;
  color: #e8e8e8;
  margin: 0;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 24px; }
.navbar {
  background: #161922;
  border-bottom: 1px solid #262b36;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.navbar a {
  color: #cfd6e4;
  text-decoration: none;
  margin-right: 18px;
  font-size: 14px;
}
.navbar a:hover { color: #7ab8ff; }
.navbar .brand { font-weight: 700; color: #7ab8ff; }
.card {
  background: #161922;
  border: 1px solid #262b36;
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 18px;
}
h1, h2, h3 { color: #fff; }
label { display: block; margin: 10px 0 4px; font-size: 13px; color: #aab2c5; }
input, select, textarea {
  width: 100%;
  padding: 10px;
  background: #0f1115;
  border: 1px solid #2d3340;
  border-radius: 6px;
  color: #e8e8e8;
  font-size: 14px;
}
textarea { min-height: 100px; resize: vertical; }
button, .btn {
  background: #3d7bfd;
  color: white;
  border: none;
  padding: 10px 18px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  margin-top: 14px;
  display: inline-block;
  text-decoration: none;
}
button:hover, .btn:hover { background: #2f63d4; }
.btn-danger { background: #d4453a; }
.btn-danger:hover { background: #b23930; }
.error { color: #ff6b6b; margin: 10px 0; }
.success { color: #5ee6a0; margin: 10px 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.item-card { background: #0f1115; border: 1px solid #2d3340; border-radius: 8px; padding: 14px; }
.tag { display: inline-block; background: #2d3340; color: #9fb3d9; font-size: 11px; padding: 2px 8px; border-radius: 10px; margin-right: 4px; }
.chat-box { height: 420px; overflow-y: auto; background: #0f1115; border: 1px solid #2d3340; border-radius: 8px; padding: 14px; margin-bottom: 10px; }
.msg { margin-bottom: 10px; padding: 8px 12px; border-radius: 8px; max-width: 80%; }
.msg.user { background: #3d7bfd; margin-left: auto; color: white; }
.msg.bot { background: #262b36; }
.auth-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.auth-box { width: 360px; }
.home-links { display:flex; gap:14px; flex-wrap:wrap; }
.home-links .btn { flex: 1; text-align:center; }
small.hint { color: #7a8396; display:block; margin-top:6px; }