:root {
  --bg: #f4f6f9; --card: #ffffff; --ink: #18212f; --muted: #5d6b7e; --line: #dde3ec;
  --accent: #1456c8; --accent-ink: #ffffff; --error-bg: #fdecec; --error-ink: #9b1c1c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10151d; --card: #1a212c; --ink: #e8edf5; --muted: #9aa8bb; --line: #2b3545;
    --accent: #6ea3ff; --accent-ink: #0b1220; --error-bg: #3a1a1a; --error-ink: #ffb4b4;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.6 "Segoe UI", "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", system-ui, sans-serif;
}
a { color: var(--accent); }
.top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px 24px; background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; color: var(--ink); text-decoration: none; }
.who { display: flex; align-items: center; gap: 12px; min-width: 0; }
.who .name { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.who form { margin: 0; }
button.link { background: none; border: 0; padding: 0; color: var(--accent); font: inherit; cursor: pointer; text-decoration: underline; }
main { max-width: 1080px; margin: 0 auto; padding: 24px 16px 64px; }
h1 { font-size: 1.6rem; margin: 0 0 4px; }
h2 { font-size: 1rem; margin: 28px 0 10px; color: var(--muted); font-weight: 600; letter-spacing: .04em; }
.muted { color: var(--muted); font-size: .9rem; margin: 0; }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.tile {
  display: flex; flex-direction: column; gap: 4px; padding: 16px; min-height: 112px;
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  color: var(--ink); text-decoration: none; transition: border-color .12s, transform .12s;
}
.tile:hover, .tile:focus-visible { border-color: var(--accent); transform: translateY(-1px); outline: none; }
.tile-name { font-weight: 700; font-size: 1.05rem; }
.tile-desc { color: var(--muted); font-size: .9rem; flex: 1; }
.tile-host { color: var(--muted); font-size: .78rem; font-family: ui-monospace, Consolas, monospace; }
.tag { margin-left: 8px; padding: 1px 8px; border: 1px solid var(--line); border-radius: 999px; font-size: .72rem; font-weight: 500; color: var(--muted); }
.login { max-width: 460px; margin: 12vh auto 0; padding: 32px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; text-align: center; }
.button { display: inline-block; margin-top: 12px; padding: 10px 22px; border-radius: 8px; background: var(--accent); color: var(--accent-ink); font-weight: 600; text-decoration: none; }
.error, .empty { padding: 12px 16px; border-radius: 8px; }
.error { background: var(--error-bg); color: var(--error-ink); }
.empty { background: var(--card); border: 1px dashed var(--line); color: var(--muted); }
.catalog { width: 100%; border-collapse: collapse; margin-top: 16px; background: var(--card); font-size: .9rem; }
.catalog th, .catalog td { padding: 8px 10px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.catalog th { color: var(--muted); font-weight: 600; }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: .8rem; word-break: break-all; }
@media (max-width: 720px) { .catalog { display: block; overflow-x: auto; } }