:root {
  --bg: #f5f6f8;
  --card: #fff;
  --text: #1f2328;
  --muted: #59636e;
  --line: #d0d7de;
  --brand: #07a35a;
  --brand-dark: #05834a;
  --danger: #b42318;
  --focus: #1f6feb;
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

main { max-width: 820px; margin: 0 auto; padding: 16px; }
main.narrow { max-width: 380px; padding-top: 12vh; }
h1 { font-size: 22px; text-align: center; }
h2 { font-size: 17px; margin: 0 0 12px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 18px;
  margin-bottom: 16px;
}

label { display: block; margin: 12px 0 4px; font-weight: 500; }
label.check { display: flex; gap: 8px; align-items: center; font-weight: 400; }
fieldset { border: 1px dashed var(--line); border-radius: 8px; margin: 12px 0; padding: 4px 12px 12px; }
legend { color: var(--muted); padding: 0 4px; }

input, select, textarea {
  width: 100%;
  font: inherit;
  color: inherit;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}
input[type="checkbox"] { width: 18px; height: 18px; margin: 0; }
textarea { resize: vertical; }
#yaml-editor { font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; white-space: pre; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

button {
  font: inherit;
  cursor: pointer;
  border: 1px solid var(--brand-dark);
  background: var(--brand);
  color: #fff;
  padding: 8px 16px;
  border-radius: 6px;
}
button:hover { background: var(--brand-dark); }
button.secondary { background: #fff; color: var(--text); border-color: var(--line); }
button.secondary:hover { background: #eef1f4; }
button.link { background: none; border: none; color: var(--muted); padding: 4px 8px; }
button.link:hover { color: var(--text); text-decoration: underline; }
button[disabled] { opacity: 0.6; cursor: wait; }

#login-form button { width: 100%; margin-top: 16px; }

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 2;
}
.topbar nav { display: flex; gap: 4px; flex: 1; }
.tab { background: none; border: none; color: var(--muted); padding: 6px 12px; border-radius: 6px; }
.tab:hover { background: #eef1f4; color: var(--text); }
.tab[aria-current="page"] { background: #e7f6ee; color: var(--brand-dark); font-weight: 600; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.sticky-actions {
  position: sticky;
  bottom: 0;
  padding: 12px 0;
  background: linear-gradient(transparent, var(--bg) 30%);
}

.badge { display: inline-block; padding: 1px 10px; border-radius: 999px; font-size: 13px; background: #eef1f4; color: var(--muted); }
.badge.running { background: #e7f6ee; color: var(--brand-dark); }
.badge.login, .badge.need_config, .badge.waiting_agent, .badge.starting { background: #fff4e5; color: #8a4b00; }
.badge.error { background: #fdecea; color: var(--danger); }

.kv { display: grid; grid-template-columns: 6em 1fr; gap: 4px 12px; margin: 12px 0 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-all; }

#qr-card { text-align: center; }
#qr-img { display: block; margin: 8px auto; border: 1px solid var(--line); border-radius: 8px; image-rendering: pixelated; }

.chat-list { list-style: none; padding: 0; margin: 0; }
.chat-list li { display: flex; align-items: center; gap: 8px; padding: 6px 0; border-bottom: 1px solid #eef1f4; }
.chat-list li:last-child { border-bottom: none; }
.chat-list .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-list .tag { font-size: 12px; color: var(--muted); border: 1px solid var(--line); border-radius: 4px; padding: 0 6px; }
.chat-list button { padding: 2px 10px; font-size: 13px; }

.hint { color: var(--muted); font-size: 13px; font-weight: 400; }
.last-error { margin: 12px 0 0; padding: 8px 12px; border-radius: 6px; background: #fdecea; color: var(--danger); word-break: break-all; }
.error { color: var(--danger); min-height: 1.6em; margin: 8px 0 0; }
.toast { background: #1f2328; color: #fff; padding: 8px 14px; border-radius: 6px; }
.toast.error { background: var(--danger); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.topbar strong, .tab, button.link { white-space: nowrap; }

@media (max-width: 560px) {
  /* 窄屏：标题和"退出"一行，导航单独一行 */
  .topbar { flex-wrap: wrap; gap: 8px; }
  .topbar nav { order: 3; flex-basis: 100%; }
  #logout { margin-left: auto; }
  .kv { grid-template-columns: 5em 1fr; }
}