:root {
  --bg: #f4f4f1; --card: #ffffff; --text: #1b1d21; --muted: #6b6f76; --line: #e3e3de;
  --on: #e8a33d; --danger: #b3261e;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14161a; --card: #1f2227; --text: #eceef1; --muted: #9aa0a8; --line: #2c3036; --on: #f0b552; --danger: #f2b8b5; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: env(safe-area-inset-top) 16px calc(env(safe-area-inset-bottom) + 24px);
}
header { display: flex; align-items: center; justify-content: space-between; max-width: 720px; margin: 0 auto; }
h1 { font-size: 1.6rem; margin: 20px 0; }
h2 { font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 24px 0 8px; }
button { font: inherit; color: inherit; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 8px 14px; cursor: pointer; }
#refresh { font-size: 1.2rem; width: 44px; height: 44px; padding: 0; }
main, form { max-width: 720px; margin: 0 auto; }
form { display: grid; gap: 10px; margin-top: 15vh; }
input { font: inherit; padding: 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--text); }
.error, #errors p { color: var(--danger); font-size: .9rem; margin: 4px 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.device {
  display: flex; flex-direction: column; align-items: flex-start; gap: 6px; text-align: left;
  min-height: 96px; padding: 14px; border-radius: 14px;
}
.device .name { font-weight: 600; }
.device .meta { color: var(--muted); font-size: .8rem; }
.device[aria-pressed="true"] { border-color: var(--on); box-shadow: inset 0 0 0 1px var(--on); }
.device[aria-pressed="true"] .meta { color: var(--on); }
.device:disabled { opacity: .55; cursor: default; }
.device.busy { opacity: .7; }