:root {
  --bg: #0b1020; --card: #151b2e; --card2: #1c2540; --fg: #e7ecf5;
  --muted: #8b97b3; --accent: #ff5a3c; --accent2: #2dd4bf; --line: #2a3350;
  --ok: #4ade80; --err: #f87171;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg); color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 16px; line-height: 1.5; padding-bottom: 40px;
}
header {
  position: sticky; top: 0; z-index: 10;
  background: linear-gradient(180deg, #11182e, #0b1020);
  padding: 14px 16px 12px; border-bottom: 1px solid var(--line);
}
header h1 { font-size: 1.25rem; margin: 0; }
header .sub { color: var(--muted); font-size: .72rem; margin-top: 2px; }
.status { display: flex; align-items: center; gap: 8px; margin-top: 8px; font-size: .85rem; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot.on { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.dot.off { background: #555; }

main { max-width: 640px; margin: 0 auto; padding: 14px; display: flex; flex-direction: column; gap: 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 14px; }
.card h2 { font-size: .95rem; margin: 0 0 10px; color: var(--accent2); }
.card.legal { background: #2a1212; border-color: #5c2626; }
.card.legal p { font-size: .8rem; color: #f0d4d4; margin: 6px 0 0; }
.hint { font-size: .78rem; color: var(--muted); margin: 4px 0 10px; }
.muted { color: var(--muted); }
.small { font-size: .8rem; }

.row { display: flex; align-items: center; gap: 10px; margin: 8px 0; }
.row label { min-width: 90px; font-size: .85rem; color: var(--muted); }
.row.btns { gap: 10px; }
input[type="number"], input[type="text"], select {
  flex: 1; background: var(--card2); color: var(--fg);
  border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font-size: 1rem; min-width: 0;
}
input[type="range"] { flex: 1; accent-color: var(--accent); }
.chk { display: flex; align-items: center; gap: 6px; min-width: auto; }

button {
  background: var(--card2); color: var(--fg); border: 1px solid var(--line);
  border-radius: 12px; padding: 12px 16px; font-size: 1rem; cursor: pointer; font-weight: 600;
}
button:active { transform: scale(.98); }
button:disabled { opacity: .45; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.small { padding: 9px 12px; font-size: .85rem; }
.filebtn { background: var(--card2); border: 1px solid var(--line); border-radius: 12px; padding: 9px 12px; cursor: pointer; font-weight: 600; }

.meter { height: 10px; background: var(--card2); border-radius: 6px; overflow: hidden; margin-top: 4px; }
.bar { height: 100%; width: 0; background: linear-gradient(90deg, var(--accent2), var(--accent)); transition: width .2s; }

.stats .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.stats .grid > div { background: var(--card2); border-radius: 10px; padding: 10px; display: flex; flex-direction: column; }
.stats .k { font-size: .7rem; color: var(--muted); }
.stats .v { font-size: 1.1rem; font-weight: 700; }

.log { font-family: ui-monospace, Menlo, monospace; font-size: .72rem; max-height: 180px; overflow-y: auto; color: var(--muted); }
.log .ok { color: var(--ok); } .log .err { color: var(--err); }

details summary { cursor: pointer; font-size: .9rem; color: var(--accent2); font-weight: 600; }
code { background: var(--card2); padding: 1px 5px; border-radius: 5px; font-size: .85em; }

footer { max-width: 640px; margin: 16px auto 0; padding: 0 16px; color: var(--muted); font-size: .7rem; text-align: center; }
footer a { color: var(--accent2); }