/*
 * 光湖 Portal · 样式
 * 守护: 铸渊 · ICE-GL-ZY001
 * 主权: TCS-0002∞ · 国作登字-2026-A-00037559
 *
 * 设计口径:
 *   - 全部走系统中文字体回退栈 (思源黑体 / PingFang / 微软雅黑 / sans-serif)
 *     不引外部 CDN 字体 (国内 2C2G 不依赖 Google Fonts).
 *   - 颜色取"光湖夜湖 · 月白" (深湛蓝 #163e6b + 米白 #f5e6c8 点缀)
 */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family:
    "Source Han Sans CN", "Source Han Sans SC", "Noto Sans CJK SC",
    "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "微软雅黑",
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: #1c2330;
  background: #f6f7fb;
}

body {
  display: flex;
  flex-direction: column;
}

/* ─── 顶栏 ─── */
.topbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 18px;
  background: linear-gradient(90deg, #102a45 0%, #163e6b 100%);
  color: #f5e6c8;
  border-bottom: 1px solid #0c1f33;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.brand-mark { font-size: 22px; opacity: 0.9; }
.brand-name { font-size: 16px; letter-spacing: 0.04em; }
.brand-meta { flex: 1; font-size: 12px; opacity: 0.55; letter-spacing: 0.03em; }
.health {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(245, 230, 200, 0.12);
  border: 1px solid rgba(245, 230, 200, 0.25);
  white-space: nowrap;
}
.health.ok { background: rgba(76, 187, 124, 0.18); border-color: rgba(76, 187, 124, 0.45); }
.health.bad { background: rgba(214, 99, 99, 0.18); border-color: rgba(214, 99, 99, 0.45); }

/* ─── 三栏布局 ─── */
.layout {
  flex: 1 1 auto;
  display: grid;
  grid-template-columns: 240px 1fr 280px;
  min-height: 0; /* allow children to scroll */
}
.col {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-right: 1px solid #e3e6ee;
  background: #fff;
}
.col-right { border-right: none; border-left: 1px solid #e3e6ee; background: #fafbfd; }
.col-left { background: #fafbfd; }

/* 左栏 */
.col-left { padding: 12px 10px; gap: 10px; }
.btn-primary {
  appearance: none;
  border: 1px solid #163e6b;
  background: #163e6b;
  color: #f5e6c8;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
}
.btn-primary:hover { background: #1d4d83; }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.conv-list { flex: 1 1 auto; overflow-y: auto; display: flex; flex-direction: column; gap: 4px; }
.conv-item {
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  border: 1px solid transparent;
  background: transparent;
  text-align: left;
  font-family: inherit;
  color: inherit;
  width: 100%;
}
.conv-item:hover { background: #eef1f7; }
.conv-item.active { background: #e7eef8; border-color: #b9c8e0; color: #163e6b; }
.conv-item .conv-title { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv-item .conv-meta { display: block; font-size: 11px; color: #6a778d; margin-top: 2px; }
.empty { padding: 14px 10px; color: #8a93a8; font-size: 13px; text-align: center; }
.col-foot { font-size: 11px; color: #8a93a8; text-align: center; padding: 6px 0; }

/* 中栏 */
.col-center { background: #fff; }
.tab-bar { display: flex; gap: 0; border-bottom: 1px solid #e3e6ee; }
.tab {
  flex: 1;
  appearance: none;
  background: #f6f7fb;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 12px 10px;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  color: #4a5468;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.tab small { font-size: 11px; color: #8a93a8; font-weight: normal; }
.tab:hover { background: #eef1f7; }
.tab.tab-active {
  background: #fff;
  border-bottom-color: #163e6b;
  color: #163e6b;
  font-weight: 600;
}
.chat-scroll {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 16px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.chat-empty { color: #8a93a8; text-align: center; margin-top: 40px; }
.chat-empty .muted { font-size: 12px; opacity: 0.75; }
.msg { max-width: 80%; padding: 10px 14px; border-radius: 10px; word-wrap: break-word; white-space: pre-wrap; }
.msg-user { align-self: flex-end; background: #e7eef8; color: #163e6b; border-bottom-right-radius: 2px; }
.msg-asst { align-self: flex-start; background: #f1f3f8; color: #1c2330; border-bottom-left-radius: 2px; }
.msg-asst.streaming::after { content: "▍"; opacity: 0.5; margin-left: 2px; }
.msg-error { align-self: flex-start; background: #fdecec; color: #913030; border: 1px solid #f1bbbb; }

.composer {
  flex: 0 0 auto;
  display: flex;
  gap: 8px;
  padding: 10px 14px 14px;
  border-top: 1px solid #e3e6ee;
  background: #fafbfd;
}
.composer textarea {
  flex: 1 1 auto;
  resize: none;
  font-family: inherit;
  font-size: 14px;
  padding: 8px 10px;
  border: 1px solid #cdd3df;
  border-radius: 6px;
  background: #fff;
  color: inherit;
  line-height: 1.6;
}
.composer textarea:focus { outline: none; border-color: #163e6b; }

/* 右栏 */
.col-right { padding: 12px 14px; gap: 10px; overflow-y: auto; }
.col-title { font-size: 14px; margin: 4px 0 8px; color: #163e6b; font-weight: 600; }
.ctx-cards { display: flex; flex-direction: column; gap: 8px; }
.ctx-card {
  background: #fff;
  border: 1px solid #e3e6ee;
  border-radius: 6px;
  padding: 10px 12px;
}
.ctx-card h4 { margin: 0 0 4px; font-size: 13px; color: #163e6b; }
.ctx-card p { margin: 0; font-size: 12px; color: #4a5468; line-height: 1.55; }
.ctx-card .ctx-tag { display: inline-block; font-size: 11px; padding: 1px 6px; border-radius: 999px; background: #e7eef8; color: #163e6b; margin-right: 4px; }

/* 响应式 (窄屏只显示中栏) */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .col-left, .col-right { display: none; }
  .brand-meta { display: none; }
}