:root {
  --brand: #0d6efd;
  --brand-dark: #0a4fbe;
  --bg-soft: #f5f7fb;
}

body {
  background: var(--bg-soft);
  min-height: 100vh;
}

.app-navbar {
  background: linear-gradient(135deg, var(--brand-dark), var(--brand));
}

.card {
  border: none;
  border-radius: 0.9rem;
  box-shadow: 0 2px 10px rgba(20, 30, 60, 0.06);
}

.card-header {
  background: transparent;
  border-bottom: 1px solid rgba(0,0,0,.06);
  font-weight: 600;
}

.btn-primary {
  background: var(--brand);
  border-color: var(--brand);
}

.btn-primary:hover {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
}

/* Message bubbles for the conversation view */
.bubble {
  max-width: 80%;
  padding: 0.6rem 0.9rem;
  border-radius: 1rem;
  margin-bottom: 0.5rem;
  word-wrap: break-word;
  white-space: pre-wrap;
}

.bubble-in {
  background: #fff;
  border: 1px solid #e5e9f2;
  border-bottom-left-radius: 0.25rem;
  margin-right: auto;
}

.bubble-out {
  background: var(--brand);
  color: #fff;
  border-bottom-right-radius: 0.25rem;
  margin-left: auto;
}

.bubble-meta {
  font-size: 0.72rem;
  opacity: 0.7;
  margin-top: 0.15rem;
}

.conversation-list .list-group-item {
  border-radius: 0.75rem;
  margin-bottom: 0.4rem;
  border: 1px solid #e9edf5;
}

.conversation-list .list-group-item.unread {
  background: #eaf2ff;
  font-weight: 600;
}

.chip {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 1rem;
  background: #e9edf5;
  font-size: 0.78rem;
  margin: 0.1rem;
}

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--brand-dark), var(--brand));
}

.login-card {
  width: 100%;
  max-width: 380px;
}

@media (max-width: 576px) {
  .bubble { max-width: 92%; }
}