:root {
  --bg: #0b1020;
  --panel: rgba(15, 20, 35, 0.78);
  --panel2: rgba(15, 20, 35, 0.58);
  --text: #e8ecff;
  --muted: rgba(232, 236, 255, 0.7);
  --accent: #8dd3ff;
  --btn: rgba(255, 255, 255, 0.09);
  --btnHover: rgba(255, 255, 255, 0.14);
  --btnActive: rgba(141, 211, 255, 0.18);
  --border: rgba(255, 255, 255, 0.14);
}

html,
body {
  height: 100%;
  margin: 0;
  background: radial-gradient(1200px 800px at 30% 15%, #15204a 0%, var(--bg) 55%, #070a14 100%);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
}

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

canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.back-home {
  position: fixed;
  left: 14px;
  bottom: 14px;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 12px;
  backdrop-filter: blur(10px);
}
.back-home:hover {
  border-color: rgba(141, 211, 255, 0.35);
}

.ui {
  position: fixed;
  left: 14px;
  top: 14px;
  z-index: 10;
  max-width: min(520px, calc(100vw - 28px));
  display: grid;
  gap: 10px;
  user-select: none;
  pointer-events: none;
}

.panel {
  pointer-events: auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 12px;
  backdrop-filter: blur(8px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
}

.title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.title h1 {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.2px;
  font-weight: 650;
}

.title .hint {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.row-mt-8 {
  margin-top: 8px;
}

.meta-mt-8 {
  margin-top: 8px;
}

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

.control {
  display: grid;
  gap: 6px;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel2);
}

.control .label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  font-size: 12px;
  color: rgba(232, 236, 255, 0.92);
}

.control .label small {
  color: var(--muted);
  font-size: 11px;
  white-space: nowrap;
}

.control .row2 {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
}

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

select,
input[type="checkbox"] {
  accent-color: var(--accent);
}

select {
  width: 100%;
  border-radius: 10px;
  padding: 7px 10px;
  font-size: 12px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.18);
  color: var(--text);
  outline: none;
}

.toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  color: rgba(232, 236, 255, 0.9);
  font-size: 12px;
}

.toggles label {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  cursor: pointer;
}

button {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--btn);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 10px;
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.06s ease;
  outline: none;
}

button:focus-visible,
select:focus-visible {
  outline: 3px solid rgba(141, 211, 255, 0.35);
  outline-offset: 2px;
}

/* Mobile: painel mais compacto e menos “altura perdida” */
@media (max-width: 980px) {
  .ui {
    left: 10px;
    top: 10px;
    max-width: calc(100vw - 20px);
  }
  .panel {
    max-height: 72vh;
    overflow: auto;
  }
  .title {
    flex-direction: column;
    align-items: flex-start;
  }
  .title .hint {
    white-space: normal;
  }
  .footer {
    display: none;
  }
}

button:hover {
  background: var(--btnHover);
}

button:active {
  transform: translateY(1px);
}

button[data-active="true"] {
  background: var(--btnActive);
  border-color: rgba(141, 211, 255, 0.35);
}

.meta {
  margin-top: 10px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 10px;
  font-size: 12px;
  line-height: 1.35;
}

.meta strong {
  color: var(--accent);
  font-weight: 650;
}

.meta code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 11px;
  color: rgba(232, 236, 255, 0.9);
}

.footer {
  position: fixed;
  right: 14px;
  bottom: 14px;
  z-index: 10;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px 12px;
  pointer-events: none;
  font-size: 12px;
  color: var(--muted);
  backdrop-filter: blur(8px);
}

.kbd {
  display: inline-block;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-bottom-color: rgba(255, 255, 255, 0.12);
  padding: 1px 6px;
  border-radius: 7px;
  background: rgba(0, 0, 0, 0.12);
  color: rgba(232, 236, 255, 0.85);
  font-size: 11px;
}