:root {
  --bg-base: #eef1f6;
  --glass: rgba(255, 255, 255, .62);
  --glass-strong: rgba(255, 255, 255, .78);
  --glass-border: rgba(255, 255, 255, .55);
  --hairline: rgba(0, 0, 0, .07);
  --text: #1c1c1f;
  --text-dim: #6e6e73;
  --accent: #3478f6;
  --accent-hover: #2f6de0;
  --accent-gradient: linear-gradient(180deg, #5b8cff 0%, #3478f6 100%);
  --danger: #ff3b30;
  --code-bg: rgba(0, 0, 0, .045);
  --code-border: rgba(0, 0, 0, .08);
  --bubble-shadow: 0 6px 18px rgba(52, 120, 246, .28);
  --panel-shadow: 0 10px 40px rgba(23, 33, 73, .12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
    "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* 柔和渐变 + 光晕，让毛玻璃有层次可透 */
  background:
    radial-gradient(120% 80% at 12% -8%, #dce7ff 0%, transparent 55%),
    radial-gradient(100% 70% at 95% 10%, #e6e1ff 0%, transparent 50%),
    radial-gradient(90% 70% at 80% 100%, #d7f0f8 0%, transparent 50%),
    linear-gradient(180deg, #f2f4f9 0%, #e9edf4 100%);
  background-attachment: fixed;
}

.hidden { display: none !important; }

/* ================= 登录（毛玻璃卡片） ================= */
.login-wrap {
  height: 100vh;
  height: 100dvh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  padding-bottom: calc(24px + env(safe-area-inset-bottom));
}

.login-card {
  width: 380px;
  max-width: 100%;
  padding: 42px 34px;
  background: var(--glass-strong);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  backdrop-filter: blur(30px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  text-align: center;
  box-shadow: var(--panel-shadow);
}

.login-logo {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: #fff;
  background: var(--accent-gradient);
  border-radius: 16px;
  box-shadow: var(--bubble-shadow);
}
.login-card h1 { font-size: 21px; font-weight: 600; margin-bottom: 6px; letter-spacing: -.2px; }
.login-card .sub { color: var(--text-dim); font-size: 13.5px; margin-bottom: 26px; }

.login-card input {
  width: 100%;
  padding: 13px 15px;
  margin-bottom: 12px;
  border-radius: 12px;
  border: 1px solid var(--hairline);
  background: rgba(255, 255, 255, .7);
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border-color .18s, box-shadow .18s, background .18s;
}
.login-card input:focus {
  border-color: var(--accent);
  background: rgba(255, 255, 255, .9);
  box-shadow: 0 0 0 3px rgba(52, 120, 246, .14);
}

.login-card button {
  width: 100%;
  padding: 13px;
  margin-top: 6px;
  border: none;
  border-radius: 12px;
  background: var(--accent-gradient);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--bubble-shadow);
  transition: transform .1s, filter .15s;
}
.login-card button:active { transform: scale(.98); }
.login-card button:hover { filter: brightness(1.05); }
.login-card button:disabled { opacity: .6; cursor: not-allowed; }

.error { color: var(--danger); font-size: 13px; min-height: 18px; margin-top: 12px; }

/* ================= 主界面布局 ================= */
.main {
  display: flex;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

/* 侧边栏：毛玻璃 */
.sidebar {
  width: 268px;
  flex: 0 0 268px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  backdrop-filter: blur(30px) saturate(180%);
  border-right: 1px solid var(--hairline);
  display: flex;
  flex-direction: column;
}

.brand {
  padding: 18px 18px;
  border-bottom: 1px solid var(--hairline);
}
.brand-row { display: flex; flex-direction: column; gap: 3px; }
.brand-title { font-size: 15px; font-weight: 600; letter-spacing: -.2px; }
.user-name { color: var(--text-dim); font-size: 12px; }

.agents, .sessions { padding: 14px 12px; overflow-y: auto; }
.agents { border-bottom: 1px solid var(--hairline); flex: 0 0 auto; max-height: 55%; }
.sessions { flex: 1; }

.side-label {
  color: var(--text-dim);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .4px;
  margin: 0 8px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

ul { list-style: none; }

.agent-item, .session-item {
  padding: 10px 13px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text);
  margin-bottom: 3px;
  transition: background .15s;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.agent-item:hover, .session-item:hover { background: rgba(0, 0, 0, .05); }
.agent-item.active {
  background: rgba(52, 120, 246, .14);
  color: var(--accent);
  font-weight: 600;
}
.session-item { font-size: 13px; color: var(--text-dim); }
.session-item.active { background: rgba(52, 120, 246, .14); color: var(--accent); }

.mini-btn {
  background: rgba(255, 255, 255, .6);
  border: 1px solid var(--hairline);
  color: var(--text);
  width: 26px; height: 26px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
}
.mini-btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ================= 聊天区 ================= */
.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  position: relative;
}

/* 顶栏：毛玻璃 */
.chat-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  padding-top: calc(12px + env(safe-area-inset-top));
  background: var(--glass);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  backdrop-filter: blur(28px) saturate(180%);
  border-bottom: 1px solid var(--hairline);
}
.chat-head-title {
  flex: 1;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.menu-btn {
  display: none;
  background: rgba(255, 255, 255, .6);
  border: 1px solid var(--hairline);
  color: var(--text);
  border-radius: 10px;
  width: 36px; height: 36px;
  font-size: 17px;
  cursor: pointer;
  flex: 0 0 auto;
}
.menu-btn:hover { background: rgba(0, 0, 0, .05); }
.logout-btn {
  background: rgba(255, 255, 255, .55);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 8px 15px;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  flex: 0 0 auto;
  transition: color .15s, border-color .15s;
}
.logout-btn:hover { color: var(--danger); border-color: rgba(255, 59, 48, .4); }

/* 消息区：居中 */
.messages-wrap { flex: 1; overflow-y: auto; }
.messages {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 30px 24px 22px;
}

.msg-row { display: flex; margin-bottom: 24px; }
.msg-row.user { justify-content: flex-end; }

.bubble {
  max-width: 86%;
  font-size: 15.5px;
  line-height: 1.7;
  word-wrap: break-word;
}
/* AI 消息：无气泡，直接文字 */
.msg-row.ai .bubble { color: var(--text); }
/* 用户消息：iOS 蓝渐变气泡 */
.msg-row.user .bubble {
  background: var(--accent-gradient);
  color: #fff;
  padding: 11px 17px;
  border-radius: 18px;
  border-bottom-right-radius: 6px;
  white-space: pre-wrap;
  box-shadow: var(--bubble-shadow);
}

/* Markdown 渲染 */
.msg-row.ai .bubble p { margin-bottom: 10px; }
.msg-row.ai .bubble p:last-child { margin-bottom: 0; }
.msg-row.ai .bubble h1, .msg-row.ai .bubble h2, .msg-row.ai .bubble h3 {
  margin: 18px 0 8px; line-height: 1.4; font-weight: 600;
}
.msg-row.ai .bubble ul, .msg-row.ai .bubble ol { margin: 4px 0 10px 24px; }
.msg-row.ai .bubble li { margin-bottom: 4px; }
.msg-row.ai .bubble pre {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  padding: 15px 16px;
  border-radius: 12px;
  overflow-x: auto;
  margin: 12px 0;
  font-size: 13.5px;
  line-height: 1.55;
}
.msg-row.ai .bubble code {
  font-family: "SF Mono", SFMono-Regular, Consolas, "Courier New", monospace;
  font-size: 13px;
}
.msg-row.ai .bubble :not(pre) > code {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  padding: 2px 6px;
  border-radius: 6px;
  color: #d63384;
}
.msg-row.ai .bubble pre code { border: none; padding: 0; color: #1c1c1f; }
.msg-row.ai .bubble blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 14px;
  color: var(--text-dim);
  margin: 10px 0;
}
.msg-row.ai .bubble table { border-collapse: collapse; margin: 12px 0; }
.msg-row.ai .bubble th, .msg-row.ai .bubble td {
  border: 1px solid var(--hairline);
  padding: 7px 12px;
  font-size: 14px;
}
.msg-row.ai .bubble th { background: var(--code-bg); }
.msg-row.ai .bubble a { color: var(--accent); }

.cursor-blink::after {
  content: "▍";
  animation: blink 1s steps(2) infinite;
  color: var(--accent);
}
@keyframes blink { 50% { opacity: 0; } }

/* ================= 输入区（毛玻璃，iOS 风格） ================= */
.composer {
  border-top: 1px solid var(--hairline);
  background: var(--glass);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  backdrop-filter: blur(28px) saturate(180%);
  padding: 12px 16px;
  padding-bottom: calc(10px + env(safe-area-inset-bottom));
}
.composer-inner {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  background: rgba(255, 255, 255, .78);
  border: 1px solid var(--hairline);
  border-radius: 22px;
  padding: 8px 8px 8px 17px;
  box-shadow: 0 6px 22px rgba(23, 33, 73, .1);
  transition: border-color .18s, box-shadow .18s;
}
.composer-inner:focus-within {
  border-color: var(--accent);
  box-shadow: 0 6px 26px rgba(52, 120, 246, .2);
}
.composer-inner textarea {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 15.5px;
  resize: none;
  font-family: inherit;
  line-height: 1.5;
  min-height: 26px;
  max-height: 160px;
  padding: 6px 0;
}
.composer-hint {
  width: 100%;
  max-width: 760px;
  margin: 7px auto 0;
  text-align: center;
  font-size: 11.5px;
  color: var(--text-dim);
}

.send-btn, .stop-btn {
  flex: 0 0 auto;
  width: 40px; height: 40px;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .1s, filter .15s;
}
.send-btn { background: var(--accent-gradient); color: #fff; box-shadow: var(--bubble-shadow); }
.send-btn:hover { filter: brightness(1.05); }
.send-btn:active { transform: scale(.94); }
.send-btn:disabled { opacity: .4; cursor: not-allowed; }
.stop-btn { background: var(--danger); color: #fff; }

.sidebar-mask {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 18, 35, .32);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  z-index: 90;
}

/* ================= 平板：侧边栏抽屉 ================= */
@media (max-width: 1024px) {
  .sidebar {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    width: 288px;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform .28s cubic-bezier(.2, .8, .2, 1);
    box-shadow: 8px 0 40px rgba(23, 33, 73, .18);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar.open + .sidebar-mask { display: block; }
  .menu-btn { display: flex; align-items: center; justify-content: center; }
}

/* ================= 手机 ================= */
@media (max-width: 768px) {
  .chat-head { padding: 10px 12px; padding-top: calc(10px + env(safe-area-inset-top)); }
  .chat-head-title { text-align: left; }
  .messages { padding: 18px 16px 16px; }
  .bubble { max-width: 90%; font-size: 15.5px; }
  .composer { padding: 10px 12px; padding-bottom: calc(8px + env(safe-area-inset-bottom)); }
  .composer-inner { border-radius: 20px; padding-left: 14px; }
  .composer-inner textarea { font-size: 16px; } /* 防 iOS 聚焦缩放 */
  .msg-row.ai .bubble pre { font-size: 12.5px; padding: 12px; }
  .login-card { padding: 34px 26px; }
}

/* ================= 管理后台 ================= */
.admin-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 18, 35, .4);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.admin-panel {
  width: 920px;
  max-width: 100%;
  height: 85vh;
  max-height: 720px;
  display: flex;
  flex-direction: column;
  background: var(--glass-strong);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  backdrop-filter: blur(30px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: var(--panel-shadow);
  overflow: hidden;
}
.admin-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--hairline);
}
.admin-title { font-size: 16px; font-weight: 600; }
.admin-close {
  background: rgba(0,0,0,.05);
  border: none;
  color: var(--text-dim);
  width: 30px; height: 30px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 15px;
}
.admin-close:hover { background: rgba(0,0,0,.1); color: var(--text); }

.admin-tabs {
  display: flex;
  gap: 6px;
  padding: 10px 20px 0;
  border-bottom: 1px solid var(--hairline);
}
.admin-tab {
  background: transparent;
  border: none;
  padding: 9px 16px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-dim);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.admin-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.admin-body { flex: 1; overflow-y: auto; padding: 18px 20px; }

.admin-create {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 16px;
  padding: 14px;
  background: rgba(255, 255, 255, .5);
  border: 1px solid var(--hairline);
  border-radius: 14px;
}
.admin-create input, .admin-create select {
  padding: 9px 12px;
  border-radius: 9px;
  border: 1px solid var(--hairline);
  background: rgba(255,255,255,.8);
  color: var(--text);
  font-size: 14px;
  outline: none;
}
.admin-create input:focus, .admin-create select:focus {
  border-color: var(--accent);
}
.agent-checkbox-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  width: 100%;
}
.agent-checkbox {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  color: var(--text);
  padding: 5px 10px;
  background: rgba(255,255,255,.6);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  cursor: pointer;
}
.primary-btn {
  margin-left: auto;
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  padding: 9px 18px;
  border-radius: 9px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--bubble-shadow);
}
.primary-btn:hover { filter: brightness(1.05); }

.admin-table-wrap { overflow-x: auto; }
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
.admin-table th, .admin-table td {
  text-align: left;
  padding: 9px 10px;
  border-bottom: 1px solid var(--hairline);
  vertical-align: top;
}
.admin-table th {
  color: var(--text-dim);
  font-weight: 600;
  font-size: 12.5px;
  white-space: nowrap;
  position: sticky;
  top: 0;
  background: var(--glass-strong);
}
.td-agents { max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.td-actions { white-space: nowrap; }
.a-btn {
  background: rgba(255,255,255,.7);
  border: 1px solid var(--hairline);
  border-radius: 7px;
  padding: 4px 9px;
  font-size: 12px;
  cursor: pointer;
  color: var(--text);
  margin-right: 4px;
}
.a-btn:hover { background: rgba(52,120,246,.12); color: var(--accent); }
.a-btn-edit:hover { color: var(--danger); background: rgba(255,59,48,.08); }
.ok { color: #18a058; font-weight: 600; }
.fail { color: var(--danger); font-weight: 600; }