:root {
  color-scheme: dark;
  --bg-1: #0e1624;
  --bg-2: #1b2636;
  --text: #e7eef8;
  --muted: #98a9c1;
  --panel: rgba(12, 19, 30, 0.82);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 20% -10%, #294363 0%, transparent 60%),
    radial-gradient(800px 500px at 90% 10%, #1f324f 0%, transparent 55%),
    linear-gradient(160deg, var(--bg-1), var(--bg-2));
  overflow: hidden;
}

#app {
  position: fixed;
  inset: 0;
}

#hud {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 2;
  padding: 12px 14px;
  border: 1px solid rgba(150, 180, 220, 0.28);
  border-radius: 10px;
  background: var(--panel);
  backdrop-filter: blur(8px);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.34);
}

#hud h1 {
  margin: 0 0 4px;
  font-size: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

#hud p {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
}

#regenerate {
  margin-top: 10px;
  width: 100%;
  padding: 6px 10px;
  border: 1px solid rgba(150, 180, 220, 0.4);
  border-radius: 6px;
  background: rgba(40, 70, 110, 0.6);
  color: var(--text);
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.15s;
}

#regenerate:hover {
  background: rgba(60, 100, 160, 0.8);
}

#controls {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.control-row {
  display: grid;
  gap: 4px;
}

.control-row label {
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.control-row select {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid rgba(150, 180, 220, 0.4);
  border-radius: 6px;
  background: rgba(25, 45, 72, 0.8);
  color: var(--text);
  font-family: inherit;
  font-size: 12px;
}

#message {
  position: fixed;
  inset: auto 16px 16px;
  z-index: 2;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid rgba(255, 180, 180, 0.4);
  background: rgba(55, 20, 20, 0.8);
  color: #ffd6d6;
  font-size: 12px;
  display: none;
}

#model-menu {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

#model-menu button {
  padding: 8px 14px;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid rgba(150, 180, 220, 0.35);
  border-radius: 6px;
  background: rgba(40, 80, 140, 0.7);
  color: var(--text);
  backdrop-filter: blur(6px);
  transition: background 0.15s;
  white-space: nowrap;
}

#model-menu button:hover {
  background: rgba(74, 144, 217, 0.85);
}