:root {
  color-scheme: light dark;
  --bg: #f5f6f8; --fg: #1b1f24; --muted: #5c6672; --card: #ffffff;
  --line: #d9dee5; --accent: #2563eb; --accent-fg: #ffffff;
  --ok: #16a34a; --bad: #b91c1c; --err-bg: #fee2e2; --err-fg: #7f1d1d;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101418; --fg: #e6e9ec; --muted: #98a2ad; --card: #1a2027;
    --line: #2c343d; --accent: #3b82f6; --accent-fg: #ffffff;
    --ok: #4ade80; --bad: #f87171; --err-bg: #43181b; --err-fg: #fecaca;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}
main { max-width: 30rem; margin: 0 auto; padding: 1rem 1rem calc(2rem + env(safe-area-inset-bottom)); }
h1 { font-size: 1.3rem; margin: 0.6rem 0 1rem; }
h2 { font-size: 1.05rem; margin: 0 0 0.75rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 1rem; margin-bottom: 1rem; }
.muted { color: var(--muted); font-size: 0.9rem; }
label { display: block; margin-bottom: 0.75rem; font-size: 0.9rem; color: var(--muted); }
input {
  display: block; width: 100%; margin-top: 0.3rem; padding: 0.65rem 0.75rem;
  font-size: 16px; color: var(--fg); background: var(--bg);
  border: 1px solid var(--line); border-radius: 10px;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button {
  display: block; width: 100%; min-height: 48px; margin-top: 0.5rem;
  font-size: 1rem; font-weight: 600; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--line); background: var(--card); color: var(--fg);
  touch-action: manipulation;
}
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
button:disabled { opacity: 0.55; }
.links { margin-top: 1rem; display: flex; flex-direction: column; gap: 0.5rem; }
.links a { color: var(--accent); text-decoration: none; padding: 0.4rem 0; min-height: 32px; }
.error-card {
  background: var(--err-bg); color: var(--err-fg); border: 1px solid var(--bad);
  border-radius: 10px; padding: 0.75rem 1rem; margin-bottom: 1rem;
}
.code-box {
  font: 700 1.05rem/1.5 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0.04em; text-align: center; word-break: break-all;
  background: var(--bg); border: 1px dashed var(--line); border-radius: 10px;
  padding: 0.9rem 0.6rem; user-select: all; -webkit-user-select: all;
}
.rowhead { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; }
.rowhead h2 { margin: 0; }
.rowhead button { width: auto; min-height: 40px; margin: 0; padding: 0 0.9rem; font-size: 0.9rem; }
#fleet-list { list-style: none; margin: 0.75rem 0 0; padding: 0; }
#fleet-list li { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 0.85rem 1rem; margin-bottom: 0.75rem; }
.fleet-head { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.fleet-name { font-weight: 600; }
.badge { font-size: 0.78rem; font-weight: 600; padding: 0.15rem 0.55rem; border-radius: 999px; border: 1px solid; white-space: nowrap; }
.badge.on  { color: var(--ok);  border-color: var(--ok); }
.badge.off { color: var(--bad); border-color: var(--bad); }
.fleet-meta { margin: 0.35rem 0 0; font-size: 0.85rem; color: var(--muted); }
.fleet-ep { margin: 0.35rem 0 0; font-size: 0.85rem; word-break: break-all; }
.fleet-ep a { color: var(--accent); text-decoration: none; }
.fleet-ep .kind { color: var(--muted); margin-left: 0.35rem; font-size: 0.78rem; }