@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;600;800&display=swap');

:root {
  --panel-bg: rgba(8, 20, 30, 0.74);
  --panel-border: rgba(165, 227, 206, 0.32);
  --text-strong: #ecf7f9;
  --text-muted: #b6d1d6;
  --accent: #ffd686;
  --accent-alt: #87dbc5;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Manrope', 'Avenir Next', 'Segoe UI', sans-serif;
  background: #031018;
  color: var(--text-strong);
}

#worldCanvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  touch-action: manipulation;
}

.hud {
  position: fixed;
  top: 10px;
  right: 10px;
  width: min(340px, calc(100vw - 20px));
  max-height: calc(100vh - 20px);
  padding: 10px;
  border-radius: 12px;
  background: linear-gradient(160deg, var(--panel-bg), rgba(7, 15, 28, 0.9));
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(7px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-gutter: stable;
  overscroll-behavior: contain;
}

.hud h1 {
  margin: 0;
  font-size: 1rem;
  letter-spacing: 0.04em;
}

.goal {
  margin: 4px 0 8px;
  color: var(--accent-alt);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 8px;
}

.stat {
  border: 1px solid rgba(138, 202, 203, 0.24);
  border-radius: 8px;
  padding: 6px 7px;
  background: rgba(7, 23, 32, 0.58);
}

.stat span {
  display: block;
  color: var(--text-muted);
  font-size: 0.62rem;
  margin-bottom: 2px;
}

.stat strong {
  display: block;
  font-size: 0.85rem;
  color: var(--text-strong);
}

.trend-panel {
  border: 1px solid rgba(138, 202, 203, 0.24);
  border-radius: 8px;
  padding: 6px 7px 7px;
  margin-bottom: 8px;
  background: rgba(7, 23, 32, 0.52);
}

.trend-panel h2 {
  margin: 0 0 5px;
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

#trendCanvas {
  width: 100%;
  height: 62px;
  border-radius: 8px;
  background: rgba(4, 11, 18, 0.66);
  border: 1px solid rgba(111, 177, 194, 0.22);
}

.controls {
  display: grid;
  gap: 7px;
}

.button-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
}

button {
  border: 0;
  border-radius: 8px;
  padding: 6px 8px;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), #ffbb5d);
  color: #13222f;
  font-weight: 700;
  font-size: 0.82rem;
  line-height: 1.1;
}

button:hover {
  filter: brightness(1.03);
}

button:disabled {
  opacity: 0.52;
  cursor: default;
  filter: none;
}

.field {
  display: grid;
  gap: 4px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.seed-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px;
}

input[type='number'],
input[type='range'] {
  width: 100%;
}

input[type='number'] {
  border: 1px solid rgba(138, 202, 203, 0.34);
  border-radius: 8px;
  padding: 6px 7px;
  background: rgba(7, 23, 32, 0.6);
  color: var(--text-strong);
  font-size: 0.82rem;
}

input[type='range'] {
  accent-color: var(--accent-alt);
}

.selected-panel {
  margin-top: 8px;
  border: 1px solid rgba(138, 202, 203, 0.24);
  border-radius: 8px;
  padding: 8px;
  background: rgba(7, 23, 32, 0.5);
  display: grid;
  gap: 6px;
}

.selected-panel h2 {
  margin: 0;
  font-size: 0.73rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.selected-panel p {
  margin: 0;
  font-size: 0.71rem;
  color: var(--text-strong);
}

.selected-panel #selectedHint {
  color: var(--text-muted);
}

.hud::-webkit-scrollbar {
  width: 8px;
}

.hud::-webkit-scrollbar-track {
  background: rgba(11, 27, 41, 0.5);
  border-radius: 999px;
}

.hud::-webkit-scrollbar-thumb {
  background: rgba(129, 207, 255, 0.45);
  border-radius: 999px;
}

@media (max-width: 900px) {
  .hud {
    top: auto;
    right: 10px;
    bottom: 10px;
    left: 10px;
    width: auto;
    max-height: min(52vh, 380px);
  }

  .stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}