.chat-page-wrap {
  max-width: 1100px;
  margin: 32px auto 80px;
  padding: 0 24px;
}
.chat-hero-box {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 24px;
  box-shadow: var(--card-shadow);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.chb-title {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0 6px 0;
  letter-spacing: -0.5px;
}
.chb-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin: 0;
  max-width: 600px;
  line-height: 1.5;
}
.chat-card-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--card-shadow);
}
.chat-channels-bar {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 14px;
  margin-bottom: 18px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.chat-viewport {
  height: 440px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-right: 8px;
}

.chat-input-row .match-trigger-button {
  min-height: 46px;
  border-radius: 14px;
  font-weight: 700;
  transition: transform .16s ease, opacity .16s ease;
}
.chat-input-row .match-trigger-button:active { transform: scale(.97); }

@media (max-width: 600px) {
  .chat-input-row {
    display: flex;
    gap: 8px;
    padding: 10px 12px calc(10px + env(safe-area-inset-bottom, 0px));
    min-width: 0;
  }
  .chat-input-row input { min-width: 0; width: 100%; font-size: 16px; }
  .chat-input-row .match-trigger-button { flex: 0 0 auto; padding: 0 16px !important; }
  .chat-viewport { min-width: 0; overflow-x: hidden; }
}

@media (max-width: 768px) {
  .chat-page-wrap {
    margin: 16px auto calc(84px + env(safe-area-inset-bottom, 0px));
    padding: 0 14px;
  }
  .chat-hero-box {
    padding: 18px 16px;
    margin-bottom: 16px;
  }
  .chb-title {
    font-size: 22px;
  }
  .chat-card-container {
    padding: 16px;
  }
  .chat-viewport {
    height: clamp(260px, calc(100dvh - 360px), 480px);
  }
}