:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --line: #e5e7eb;
  --text: #1f2328;
  --muted: #6b7280;
  --brand: #2563eb;
  --brand-weak: #eff6ff;
  --danger: #dc2626;
  --ok: #16a34a;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0; padding: 0; height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

.hidden { display: none !important; }

/* 登录 */
.login-wrap {
  min-height: 100%;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  padding-bottom: calc(24px + env(safe-area-inset-bottom));
}
.login-box {
  width: 100%; max-width: 340px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 22px;
  text-align: center;
  box-shadow: 0 8px 24px rgba(15, 23, 42, .06);
}
.logo {
  width: 52px; height: 52px; margin: 0 auto 12px;
  border-radius: 14px;
  background: var(--brand);
  color: #fff; font-size: 26px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.login-box h1 { font-size: 19px; margin: 0 0 4px; }
.login-box .sub { color: var(--muted); font-size: 13px; margin: 0 0 20px; }

input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 11px 12px;
  font-size: 15px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
  outline: none;
}
input:focus, textarea:focus { border-color: var(--brand); }

button {
  font-family: inherit; font-size: 15px;
  border-radius: 10px; border: 1px solid var(--line);
  background: #fff; color: var(--text);
  padding: 10px 14px; cursor: pointer;
}
button:active { opacity: .75; }
button.primary {
  background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 600;
}
button.mini { padding: 5px 10px; font-size: 13px; color: var(--muted); }
button.send {
  background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 600;
  padding: 10px 18px; flex: 0 0 auto;
}
button:disabled { opacity: .5; }

.err { color: var(--danger); font-size: 13px; min-height: 18px; margin: 10px 0 0; }

/* 主界面 */
#app { display: flex; flex-direction: column; height: 100%; }

.top {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  padding-top: calc(10px + env(safe-area-inset-top));
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.top strong { font-size: 16px; }
.status-text { color: var(--muted); font-size: 12px; flex: 1; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); flex: 0 0 auto; }
.dot.busy { background: #f59e0b; }
.dot.bad { background: var(--danger); }

.view { flex: 1; overflow: hidden; display: flex; flex-direction: column; }

/* 对话 */
.messages {
  flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch;
  padding: 14px 14px 8px;
}
.msg { margin-bottom: 14px; }
.msg .who { font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.bubble {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 10px 12px;
  white-space: pre-wrap; word-break: break-word;
}
.msg.me .bubble { background: var(--brand-weak); border-color: #dbeafe; }
.think {
  font-size: 12px; color: var(--muted);
  background: #f9fafb; border-left: 3px solid var(--line);
  padding: 6px 10px; border-radius: 6px; margin-bottom: 6px;
  white-space: pre-wrap; word-break: break-word;
}
.typing { color: var(--muted); font-size: 12px; }

.composer {
  border-top: 1px solid var(--line);
  background: var(--card);
  padding: 8px 12px;
  padding-bottom: calc(8px + env(safe-area-inset-bottom));
}
.cur-session { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.composer-row { display: flex; gap: 8px; align-items: flex-end; }
.composer-row textarea { flex: 1; resize: none; max-height: 120px; }

/* 列表 */
.list { flex: 1; overflow-y: auto; padding: 10px 12px; }
.item {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 12px; margin-bottom: 10px;
}
.item .t { font-weight: 600; font-size: 15px; word-break: break-all; }
.item .m { color: var(--muted); font-size: 12px; margin-top: 3px; }
.item .acts { margin-top: 8px; display: flex; gap: 8px; }
.item .acts button { font-size: 13px; padding: 5px 12px; }
.item .acts button.del { color: var(--danger); border-color: #fecaca; }

.empty { text-align: center; color: var(--muted); font-size: 14px; padding: 32px 12px; }

/* 文件 */
.path-bar {
  padding: 8px 14px; font-size: 12px; color: var(--muted);
  background: var(--card); border-bottom: 1px solid var(--line);
  word-break: break-all;
}
.preview {
  position: fixed; left: 0; right: 0; bottom: 0; top: 0;
  background: #fff; z-index: 20;
  display: flex; flex-direction: column;
}
.preview-head {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 14px; border-bottom: 1px solid var(--line);
  padding-top: calc(12px + env(safe-area-inset-top));
}
.preview-head strong { flex: 1; font-size: 14px; word-break: break-all; }
.preview pre {
  flex: 1; overflow: auto; margin: 0; padding: 12px 14px;
  font-size: 13px; line-height: 1.6;
  white-space: pre-wrap; word-break: break-word;
}

/* 模板 */
.add-tpl {
  border-top: 1px solid var(--line); background: var(--card);
  padding: 10px 12px;
  padding-bottom: calc(10px + env(safe-area-inset-bottom));
  display: flex; flex-direction: column; gap: 8px;
}

/* Tab */
.tabbar {
  display: flex; border-top: 1px solid var(--line);
  background: var(--card);
  padding-bottom: env(safe-area-inset-bottom);
}
.tab {
  flex: 1; border: none; border-radius: 0; background: none;
  padding: 12px 0; font-size: 13px; color: var(--muted);
}
.tab.active { color: var(--brand); font-weight: 600; }

.hint{margin-top:10px;font-size:12px;color:#64748b;min-height:16px;text-align:center}