/* ============================================================
   前台聊天室布局(桌面 + 移动端)
   ============================================================ */

.view-chat {
  height: 100vh;
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  padding: 18px 18px 20px;
}

/* ---------- 顶栏 ---------- */
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-radius: var(--radius-lg);
  flex-shrink: 0;
  animation: card-in var(--duration-slow) var(--ease-out);
}
.chat-peer { display: flex; align-items: center; gap: 13px; min-width: 0; }
.chat-peer-info { min-width: 0; }
.chat-peer-name {
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: .3px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.chat-peer-sub {
  font-size: var(--text-xs);
  color: var(--color-text-sub);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 3px;
}
.header-right { display: flex; align-items: center; gap: 4px; }

/* ---------- 消息区 ---------- */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 8px 12px;
  margin: 14px 0;
  scroll-behavior: smooth;
}
.load-more {
  display: flex;
  justify-content: center;
  margin: 4px 0 16px;
}
.load-more-btn {
  padding: 7px 18px;
  border: var(--glass-border-w) solid var(--glass-border);
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  color: var(--color-text-sub);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: all var(--duration-fast);
}
.load-more-btn:hover { background: var(--hover); color: var(--color-text); }
.load-more-btn:disabled { opacity: .5; cursor: default; }

/* ---------- 底部输入区 ---------- */
.chat-footer {
  border-radius: var(--radius-lg);
  padding: 12px 14px;
  flex-shrink: 0;
  animation: card-in var(--duration-slow) var(--ease-out);
}
.chat-input {
  min-height: 46px;
  max-height: 140px;
  overflow-y: auto;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--input-bg);
  border: var(--glass-border-w) solid var(--glass-border);
  font-size: var(--text-base);
  line-height: 1.5;
  outline: none;
  transition: border-color var(--duration-base), box-shadow var(--duration-base);
}
.chat-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--active);
}
.input-tools {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
}
.input-tools .btn-send {
  margin-left: auto;
  padding: 11px 30px;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 2px;
}

/* ---------- 移动端(≤768px) ---------- */
@media (max-width: 768px) {
  .view-chat {
    padding: 0;
    max-width: 100%;
  }
  .chat-header {
    border-radius: 0;
    padding: 12px 14px;
    border-left: none;
    border-right: none;
    border-top: none;
    border-bottom: var(--glass-border-w) solid var(--glass-border);
    box-shadow: none;
  }
  .chat-header .avatar, .chat-header .avatar-char { width: 40px; height: 40px; font-size: 17px; }
  .chat-peer-name { font-size: 16px; }
  .chat-messages { padding: 18px 10px 10px; margin: 0; }
  .chat-footer {
    border-radius: 20px 20px 0 0;
    margin: 0 6px;
    padding: 10px 12px 14px;
    border-bottom: none;
  }
  .chat-input { min-height: 42px; font-size: 15px; border-radius: 13px; }
  .input-tools { margin-top: 8px; }
  .tool-btn { width: 40px; height: 40px; }
  .input-tools .btn-send { padding: 10px 26px; font-size: 15px; }
  .login-card { padding: 36px 26px; border-radius: 20px; }
}

/* 窄屏微调 */
@media (max-width: 400px) {
  .chat-peer-sub { font-size: 11px; }
  .icon-btn { width: 36px; height: 36px; }
  .msg-row { max-width: 94%; }
}