:root {
  --bg: #0f1419;
  --panel: #1a222c;
  --text: #e7eef7;
  --muted: #9aabbd;
  --accent: #3d9bfd;
  --ok: #3ecf8e;
  --warn: #f0b429;
  --danger: #f07178;
  --border: #2b3643;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #1b2a3a, var(--bg) 45%);
  color: var(--text);
  min-height: 100vh;
  padding: 24px;
}
.hidden { display: none !important; }
.panel, #app-view {
  max-width: 1100px;
  margin: 0 auto;
  background: color-mix(in srgb, var(--panel) 92%, black);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
}
h1 { margin: 0 0 4px; letter-spacing: -0.03em; }
.muted { color: var(--muted); }
.error { color: var(--danger); }
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  gap: 12px;
}
.header-actions { display: flex; gap: 8px; align-items: center; }
.inline-form { display: flex; gap: 8px; max-width: none; margin-bottom: 14px; }
.inline-form input { flex: 1; }
.secret-box {
  border: 1px solid color-mix(in srgb, var(--warn) 50%, var(--border));
  background: color-mix(in srgb, var(--warn) 12%, #121a23);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 14px;
}
.secret-box code {
  display: block;
  word-break: break-all;
  margin: 8px 0;
  color: var(--text);
}
nav {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
nav button, button, input, select, textarea {
  font: inherit;
}
nav button, button {
  background: var(--accent);
  color: #041018;
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
}
nav button { background: #243140; color: var(--text); }
nav button.active { background: var(--accent); color: #041018; }
button.ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
label { display: block; margin: 12px 0 6px; color: var(--muted); }
input, select, textarea {
  width: 100%;
  background: #101821;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
}
.filters, .row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.filters > * { flex: 1; min-width: 120px; }
.split { display: grid; grid-template-columns: 1.2fr 1fr; gap: 16px; margin-top: 14px; }
@media (max-width: 800px) { .split { grid-template-columns: 1fr; } }
.list, .detail, .cards {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #121a23;
  min-height: 280px;
}
.list { overflow: auto; max-height: 520px; }
.item, .card {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}
.item:hover, .item.active { background: #1c2835; }
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}
.badge.online, .badge.delivered, .badge.sent, .badge.received { background: color-mix(in srgb, var(--ok) 25%, transparent); color: var(--ok); }
.badge.offline, .badge.failed, .badge.expired { background: color-mix(in srgb, var(--danger) 25%, transparent); color: var(--danger); }
.detail { padding: 16px; }
.timeline { list-style: none; padding: 0; }
.timeline li { padding: 8px 0; border-bottom: 1px solid var(--border); }
.form { max-width: 560px; }
.cards { display: grid; gap: 10px; padding: 12px; margin: 12px 0; min-height: auto; }
.card { cursor: default; border: 1px solid var(--border); border-radius: 10px; }