:root {
  --bg: #080811;
  --panel: #141428;
  --line: #383f68;
  --ink: #eef1ff;
  --cyan: #53ecff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Trebuchet MS", "Verdana", sans-serif;
  background:
    radial-gradient(circle at 15% 12%, #28305f 0%, transparent 45%),
    radial-gradient(circle at 82% 10%, #4b2559 0%, transparent 42%),
    var(--bg);
}

.app {
  width: min(1140px, 94vw);
  margin: 1.1rem auto 2rem;
}

h1 {
  margin: 0;
  color: var(--cyan);
  text-shadow: 0 0 20px #53ecff5c;
}

header p {
  margin: 0.45rem 0 0.95rem;
  opacity: 0.9;
}

.toolbar,
.controls,
.stage-wrap {
  border: 1px solid var(--line);
  border-radius: 11px;
  background: linear-gradient(180deg, #171830, #0f1020);
  box-shadow: 0 14px 34px #0008, inset 0 0 0 1px #0005;
}

.toolbar {
  padding: 0.82rem;
}

.message-label {
  display: block;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.74;
  margin-bottom: 0.3rem;
}

#headline {
  width: 100%;
  border: 1px solid #576094;
  border-radius: 8px;
  padding: 0.52rem 0.66rem;
  font: inherit;
  color: var(--ink);
  background: #0f1225;
}

.actions {
  margin-top: 0.62rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

button {
  border: 1px solid #556096;
  border-radius: 8px;
  background: #141833;
  color: var(--ink);
  font: inherit;
  padding: 0.47rem 0.66rem;
  cursor: pointer;
}

button:hover {
  border-color: #9fb0ff;
}

button.primary {
  border-color: #8df6ff;
  box-shadow: 0 0 16px #53ecff3a;
}

#status {
  margin: 0.62rem 0 0;
  min-height: 1.1rem;
  font-size: 0.87rem;
  color: #ffd98b;
}

.controls {
  margin-top: 0.8rem;
  padding: 0.7rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.58rem;
}

.layer-card {
  border: 1px solid #3d466f;
  border-radius: 10px;
  padding: 0.58rem;
  background: linear-gradient(180deg, #191b36, #12132a);
}

.layer-card h2 {
  margin: 0;
  font-size: 0.98rem;
}

.layer-grid {
  margin-top: 0.45rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.42rem 0.6rem;
  align-items: center;
}

.layer-grid label {
  font-size: 0.75rem;
  opacity: 0.86;
}

.layer-grid input[type="range"],
.layer-grid input[type="color"] {
  width: 100%;
}

.stage-wrap {
  margin-top: 0.82rem;
  overflow: hidden;
}

#stage {
  width: 100%;
  height: auto;
  display: block;
  background: #04040a;
}

@media (max-width: 680px) {
  .layer-grid {
    grid-template-columns: 1fr;
  }
}