:root {
  --bg: #0b1020;
  --bg-soft: #141a30;
  --card: #171d35;
  --line: #262d4a;
  --text: #eef1fb;
  --muted: #8b93b5;
  --accent: #5b8cff;
  --accent-2: #22d3a6;
  --danger: #ff5c72;
  --radius: 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(40,54,110,.6) 0%, transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(91,140,255,.18), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 480px;
  margin: 0 auto;
  padding: max(28px, env(safe-area-inset-top)) 20px 40px;
}

.head { margin: 8px 0 22px; }
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.logo .dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 0 4px rgba(34,211,166,.18), 0 0 18px rgba(34,211,166,.5);
}
.tagline {
  margin: 6px 0 0 22px;
  color: var(--muted);
  font-size: 14px;
}

.search {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
}
#deviceId {
  flex: 1;
  min-width: 0;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 15px 16px;
  border-radius: var(--radius);
  font-size: 16px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
#deviceId::placeholder { color: var(--muted); }
#deviceId:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(91,140,255,.22);
}

.btn {
  border: 0;
  border-radius: var(--radius);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  padding: 15px 20px;
  cursor: pointer;
  transition: transform .08s ease, filter .15s ease, opacity .15s;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .55; cursor: default; }

.btn-search {
  background: linear-gradient(135deg, var(--accent), #3f6fe0);
  white-space: nowrap;
}
.actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}
.btn-unlock, .btn-lock {
  flex: 1;
  font-size: 18px;
  padding: 17px;
}
.btn-unlock {
  background: linear-gradient(135deg, var(--accent-2), #12b48c);
  box-shadow: 0 10px 28px -10px rgba(34,211,166,.6);
}
.btn-lock {
  background: linear-gradient(135deg, #ff7086, #e0435a);
  box-shadow: 0 10px 28px -10px rgba(255,92,114,.55);
}

.status {
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 14.5px;
  margin-bottom: 4px;
}
.status.info { background: var(--bg-soft); color: var(--muted); }
.status.error { background: rgba(255,92,114,.12); color: #ffb3bd; border: 1px solid rgba(255,92,114,.3); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 20px;
  margin-top: 8px;
  animation: rise .25s ease;
}
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.card-name { font-size: 19px; font-weight: 800; letter-spacing: -0.01em; }
.card-id { color: var(--muted); font-size: 13px; margin-top: 3px; font-family: ui-monospace, "SF Mono", Menlo, monospace; }

.badge {
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 700;
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--muted);
}
.badge.on { background: rgba(34,211,166,.16); color: var(--accent-2); }
.badge.off { background: rgba(255,92,114,.16); color: var(--danger); }

.grid {
  margin: 16px 0 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 16px;
}
.grid .row { min-width: 0; }
.grid dt { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.grid dd { margin: 3px 0 0; font-size: 15px; font-weight: 600; word-break: break-word; }
.grid .full { grid-column: 1 / -1; }

.unlock-msg {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 14.5px;
  text-align: center;
}
.unlock-msg.ok { background: rgba(34,211,166,.14); color: var(--accent-2); }
.unlock-msg.err { background: rgba(255,92,114,.12); color: #ffb3bd; }

.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .6s linear infinite;
  vertical-align: -3px;
}
@keyframes spin { to { transform: rotate(360deg); } }