:root {
  --bg: #060912;
  --panel: #121c33;
  --panel-2: #0d1528;
  --line: #35507a;
  --ink: #edf3ff;
  --muted: #9db1dd;
  --accent: #89f0d8;
  --accent-2: #ffd48d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Courier New", Courier, monospace;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% -4%, rgba(137, 240, 216, 0.17), transparent 42%),
    radial-gradient(circle at 95% 4%, rgba(143, 172, 255, 0.2), transparent 40%),
    linear-gradient(180deg, #0f1830, var(--bg));
  padding: 18px;
  display: grid;
  place-items: center;
}

.app {
  width: min(1080px, 100%);
  border: 2px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(16, 26, 47, 0.95), rgba(8, 13, 26, 0.98));
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  padding: 16px;
}

.back {
  color: #ffd8a9;
  text-decoration: none;
  font-size: 0.9rem;
}

.topbar h1 {
  margin: 8px 0 4px;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 1px;
}

.topbar p {
  margin: 0 0 14px;
  color: #bed0f9;
}

.layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 12px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  padding: 12px;
}

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

.panel h2 {
  margin: 0 0 10px;
  font-size: 1rem;
  text-transform: uppercase;
  color: var(--accent-2);
}

#editor,
#preview {
  display: block;
  width: 100%;
  border: 1px solid #567cb6;
  border-radius: 8px;
  background: #091224;
  image-rendering: pixelated;
}

#preview {
  aspect-ratio: 8 / 3;
  height: auto;
}

.hint {
  margin: 10px 0 0;
  color: #cbd8fb;
  font-size: 0.88rem;
}

.block {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
}

label,
span {
  color: #d8e4ff;
  font-size: 0.9rem;
}

select,
button {
  font: inherit;
  color: var(--ink);
  border: 1px solid #5c84bf;
  border-radius: 8px;
  background: linear-gradient(180deg, #34639a, #1d3f66);
  padding: 9px 10px;
}

select {
  background: #10203a;
}

button {
  cursor: pointer;
  transition: filter 0.15s ease, transform 0.08s ease;
}

button:hover { filter: brightness(1.08); }
button:active { transform: translateY(1px); }

.small {
  padding: 6px 10px;
  font-size: 0.8rem;
}

.primary {
  border-color: #f2bddd;
  background: linear-gradient(180deg, #7b4873, #512d4d);
}

.palette {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 6px;
}

.swatch {
  width: 100%;
  aspect-ratio: 1;
  border: 2px solid #4d6996;
  border-radius: 5px;
  cursor: pointer;
}

.swatch.active {
  border-color: #f8f1b8;
  box-shadow: 0 0 0 1px #f8f1b8 inset;
}

.actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.stats {
  display: grid;
  gap: 8px;
}

.stats div {
  display: flex;
  justify-content: space-between;
  border: 1px solid #3f5f8f;
  border-radius: 8px;
  background: #111d34;
  padding: 8px 10px;
}

.label {
  color: var(--muted);
  text-transform: uppercase;
  font-size: 0.72rem;
}

#status {
  margin: 0;
  color: #bfd2ff;
  font-size: 0.85rem;
}

.preview-panel {
  margin-top: 12px;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .palette {
    grid-template-columns: repeat(8, minmax(24px, 1fr));
  }
}