:root {
  color-scheme: dark;
  --bg: #07111d;
  --panel: #101b31;
  --line: #35517a;
  --text: #eef5ff;
  --muted: #a8b9db;
  --cyan: #63e6ff;
  --magenta: #ff72d2;
  --amber: #ffd57a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 16% 14%, rgba(70, 120, 255, 0.28), transparent 28%),
    radial-gradient(circle at 84% 85%, rgba(255, 84, 185, 0.22), transparent 30%),
    linear-gradient(180deg, #050913, #091220 42%, #060b15 100%);
  padding: 18px 12px 28px;
}

.deck {
  width: min(1180px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

.panel {
  border: 2px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255,255,255,0.035), rgba(255,255,255,0.01)), var(--panel);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.34);
}

.topbar {
  padding: 16px 18px;
}

.kicker {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.76rem;
  color: var(--amber);
}

.topbar h1 {
  margin: 6px 0 8px;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  color: var(--cyan);
}

.subtitle {
  margin: 0;
  max-width: 74ch;
  color: var(--muted);
  line-height: 1.45;
}

.layout {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(300px, 360px) minmax(0, 1fr);
  align-items: start;
}

.controls,
.preview {
  padding: 16px;
}

.controls h2,
.preview h2 {
  margin: 0 0 14px;
  color: var(--amber);
  font-size: 1.05rem;
}

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.field span {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

input,
select,
button {
  font: inherit;
}

input[type="text"],
select {
  width: 100%;
  border: 1px solid #47679a;
  border-radius: 12px;
  background: #091324;
  color: var(--text);
  padding: 10px 12px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--cyan);
}

.stat-field strong {
  color: var(--cyan);
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
}

button {
  border-radius: 999px;
  border: 1px solid #6485bc;
  padding: 10px 14px;
  color: var(--text);
  background: #182a4a;
  cursor: pointer;
  font-weight: 700;
}

button:hover { filter: brightness(1.08); }

button.primary {
  background: linear-gradient(120deg, #315fd0, #8d3fff);
  border-color: #acc2ff;
}

button.ghost {
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.015));
}

.frame {
  border: 1px solid #43618f;
  border-radius: 18px;
  overflow: hidden;
  background: #040912;
}

canvas {
  display: block;
  width: min(100%, 560px);
  margin: 0 auto;
  height: auto;
  image-rendering: pixelated;
}

.status {
  margin: 12px 0 10px;
  color: var(--cyan);
  min-height: 1.4em;
}

.tips {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.35;
}

.tips p {
  margin: 0;
}

.back {
  display: inline-block;
  margin-top: 12px;
  color: var(--amber);
  text-decoration: none;
}

.back:hover { text-decoration: underline; }

@media (max-width: 920px) {
  .layout {
    grid-template-columns: 1fr;
  }

  canvas {
    width: 100%;
  }
}