:root {
  --bg: #060a17;
  --panel: #0d152b;
  --panel-2: #111d3a;
  --line: #233e7a;
  --text: #dbecff;
  --muted: #86a6d8;
  --good: #67ffb7;
  --warn: #ffd369;
  --danger: #ff758f;
  --accent: #62b1ff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Courier New", Courier, monospace;
  color: var(--text);
  background:
    repeating-linear-gradient(
      to bottom,
      rgba(136, 194, 255, 0.05) 0,
      rgba(136, 194, 255, 0.05) 1px,
      transparent 1px,
      transparent 4px
    ),
    radial-gradient(circle at 20% -5%, #1f3270, transparent 50%),
    radial-gradient(circle at 90% 110%, #2e1654, transparent 45%),
    var(--bg);
  padding: 24px;
}

.app {
  width: min(920px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

.topbar {
  background: linear-gradient(180deg, #182d5d, #0f1c3a);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 20px;
  box-shadow: inset 0 0 0 1px rgba(129, 186, 255, 0.2);
}

.topbar h1 {
  margin: 8px 0 4px;
  color: #fff8b7;
  letter-spacing: 0.04em;
}

.topbar p {
  margin: 0;
  color: var(--muted);
}

.back {
  color: #9ed0ff;
  text-decoration: none;
  font-weight: bold;
}

.panel {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  box-shadow: inset 0 0 0 1px rgba(114, 166, 235, 0.2);
}

.status-panel {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 14px;
  align-items: center;
}

.byte-wrap h2 {
  margin: 0 0 8px;
  font-size: 0.95rem;
  color: var(--muted);
  text-transform: uppercase;
}

.byte-box {
  font-size: clamp(1.2rem, 3.8vw, 2rem);
  letter-spacing: 0.18em;
  padding: 12px 14px;
  border: 1px solid #3d66bf;
  border-radius: 10px;
  background: #06122e;
  color: #c9e3ff;
  text-shadow: 0 0 8px rgba(135, 201, 255, 0.45);
}

.target .byte-box {
  border-color: #9c6cff;
  color: #f0ddff;
  text-shadow: 0 0 8px rgba(205, 146, 255, 0.45);
}

.hex {
  margin-top: 7px;
  color: var(--warn);
  font-weight: bold;
}

.meta {
  min-width: 168px;
  display: grid;
  gap: 7px;
}

.meta div {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.95rem;
  color: var(--muted);
}

.meta strong {
  color: var(--text);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.panel-head h2 {
  margin: 0;
  color: #ffed9f;
  font-size: 1.02rem;
}

.ops-grid {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

button {
  font: inherit;
  border: 1px solid #3f62b5;
  border-radius: 8px;
  background: #132650;
  color: var(--text);
  padding: 10px;
  cursor: pointer;
  transition: transform 100ms ease, filter 150ms ease;
}

button:hover {
  filter: brightness(1.12);
}

button:active {
  transform: translateY(1px);
}

button.primary {
  background: linear-gradient(180deg, #5f63ff, #4047d0);
  border-color: #8893ff;
  color: #fff;
}

button.small {
  padding: 6px 10px;
  font-size: 0.85rem;
}

.hint {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.actions {
  margin-top: 12px;
}

.feed-panel ul {
  margin: 10px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 6px;
  max-height: 220px;
  overflow: auto;
}

.feed-panel li {
  color: #b9d8ff;
  font-size: 0.92rem;
}

.feed-panel li.good { color: var(--good); }
.feed-panel li.warn { color: var(--warn); }
.feed-panel li.danger { color: var(--danger); }

.chip {
  border: 1px solid #4f77cf;
  color: #b7d1ff;
  padding: 3px 7px;
  border-radius: 999px;
  font-size: 0.72rem;
}

@media (max-width: 760px) {
  body { padding: 14px; }

  .status-panel {
    grid-template-columns: 1fr;
  }

  .ops-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}