/* ═══════════════════════════════════════════════════════════════
   AI量化助手 — layout.css
   §6 app shell + 响应式 + 安全区
   ═══════════════════════════════════════════════════════════════ */

/* ── 应用容器(§6.2)────────────────────────────────────── */
#app {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 480px;
  margin: 0 auto;
  background: var(--bg-primary);
  position: relative;
}

/* ── 顶部 Header(§3.1)────────────────────────────────── */
.header {
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  border-bottom: 1px solid var(--border-color);
  /* §3.1 微动效新增:底部金光透出 */
  box-shadow: inset 0 -1px 0 var(--gold-alpha-30);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  z-index: 10;
  /* §5.2.1 Header 进入 fadeIn 0.4s */
  animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.header-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.header-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.5px;
}

.header-subtitle {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 1px;
}

.header-status {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-muted);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse-dot 2s infinite;
  transition: all 0.2s ease;
}

.status-dot.offline {
  background: var(--danger);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ── 聊天滚动区 ────────────────────────────────────────── */
.chat-container {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
  transition: opacity 0.2s ease;
}

/* 清空聊天时的淡出(§5.2.6) */
.chat-container.fade-out {
  opacity: 0;
}

/* 滚动条美化 */
.chat-container::-webkit-scrollbar { width: 3px; }
.chat-container::-webkit-scrollbar-track { background: transparent; }
.chat-container::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

/* ── 响应式适配(§6.3)────────────────────────────────── */
@media (max-width: 380px) {
  .header { padding: 10px 12px; }
  .header-title { font-size: 15px; }
  .chat-container { padding: 10px 10px; }
  .message { max-width: 90%; }
  .quick-btn { padding: 6px 10px; font-size: 11px; }
  .input-area { padding: 6px 10px; }
}