:root {
  --bg: #0b1723;
  --panel: #12263a;
  --text: #e7eef6;
  --muted: #9db4c9;
  --accent: #39d2c0;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(circle at 20% 10%, #15304a, var(--bg));
  font-family: "SF Mono", Menlo, Consolas, monospace;
}

.layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 360px 1fr;
}

.controls {
  padding: 1rem;
  background: color-mix(in srgb, var(--panel) 90%, black);
  border-right: 1px solid #24435f;
}

.controls h1 { margin-top: 0; font-size: 1rem; }

.surfaceTopNav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.55rem 0 0.8rem;
  padding-bottom: 0.1rem;
}

.surfaceTopNavLink {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  border: 1px solid #2f5778;
  background: #163754;
  color: var(--text);
  text-decoration: none;
  padding: 0.38rem 0.62rem;
  font-size: 0.84rem;
  line-height: 1.2;
  white-space: nowrap;
}

.surfaceTopNavLink:hover { border-color: var(--accent); }

.surfaceTopNavLink.active {
  background: #245985;
  border-color: #4b86b5;
}

label {
  display: grid;
  gap: 0.4rem;
  margin: 0.8rem 0;
  color: var(--muted);
}

input[type="range"] { width: 100%; }

.inputRow {
  display: grid;
  grid-template-columns: 1fr 92px;
  gap: 0.5rem;
  align-items: center;
}

input[type="number"] {
  width: 100%;
  border: 1px solid #2f5778;
  background: #0c1d2d;
  color: var(--text);
  padding: 0.3rem 0.35rem;
}

output { color: var(--text); font-weight: 700; }

.actions {
  display: flex;
  gap: 0.6rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

button {
  border: 1px solid #2f5778;
  background: #163754;
  color: var(--text);
  padding: 0.5rem 0.7rem;
  cursor: pointer;
}

button:hover { border-color: var(--accent); }

#apiResult {
  white-space: pre-wrap;
  font-size: 0.75rem;
  color: var(--muted);
  background: #0b1520;
  padding: 0.5rem;
  border: 1px solid #1f374d;
  min-height: 4rem;
}

.viewport {
  position: relative;
  min-height: 60vh;
}

#view {
  width: 100%;
  height: 100%;
  display: block;
}

#viewportHint {
  position: absolute;
  left: 50%;
  bottom: 0.75rem;
  transform: translateX(-50%);
  font-size: 0.72rem;
  color: #9fc2d6;
  background: rgba(7, 19, 31, 0.68);
  border: 1px solid #24435f;
  padding: 0.28rem 0.5rem;
  pointer-events: none;
  letter-spacing: 0.02em;
  z-index: 4;
}

.viewportCard {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: min(460px, calc(100% - 2rem));
  border: 1px solid #24435f;
  background: rgba(10, 24, 38, 0.88);
  padding: 1rem;
  z-index: 5;
}

.viewportCard h2 { margin: 0 0 0.75rem 0; font-size: 1rem; }

#contextSummary { margin: 0 0 1rem 0; color: var(--muted); line-height: 1.5; }

.viewport details {
  border-top: 1px solid #24435f;
  padding-top: 0.75rem;
}

.viewport summary { cursor: pointer; color: var(--text); }

#contextJson {
  margin-top: 0.75rem;
  padding: 0.75rem;
  max-height: 42vh;
  overflow: auto;
  background: #09131d;
  color: #9db4c9;
  border: 1px solid #24435f;
  font-size: 0.75rem;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 70vh;
  }

  .controls {
    border-right: none;
    border-bottom: 1px solid #24435f;
  }

  .viewportCard {
    position: static;
    width: auto;
    margin: 0.5rem;
  }

  #viewportHint { display: none; }
}