html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #07121f;
  font-family: Arial, Helvetica, sans-serif;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

:root {
  --ui-scale: 1;
}

#game {
  width: 100%;
  height: 100%;
}

canvas {
  display: block;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.config-link,
.pause-link {
  position: fixed;
  top: calc(16px * var(--ui-scale));
  right: calc(16px * var(--ui-scale));
  z-index: 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: calc(36px * var(--ui-scale));
  padding: 0 calc(14px * var(--ui-scale));
  border: calc(1px * var(--ui-scale)) solid rgba(255, 255, 255, 0.24);
  border-radius: calc(6px * var(--ui-scale));
  background: rgba(7, 18, 31, 0.72);
  color: #ffffff;
  font-size: calc(14px * var(--ui-scale));
  font-weight: 700;
  text-decoration: none;
  font-family: inherit;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.pause-link {
  top: calc(60px * var(--ui-scale));
}

.pause-link:disabled {
  opacity: 0.55;
  cursor: default;
}

.config-page {
  min-height: 100%;
  overflow: auto;
  color: #f3fbff;
}

.config-panel {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0;
}

.config-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.config-header h1 {
  margin: 0 0 8px;
  font-size: 32px;
}

.config-header p {
  margin: 0;
  color: #b8cedf;
}

.config-form {
  display: grid;
  gap: 14px;
}

.config-form label {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(160px, 220px);
  align-items: center;
  gap: 16px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.config-form span {
  font-weight: 700;
}

.config-form input {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  background: #102336;
  color: #ffffff;
  font: inherit;
  padding: 10px 12px;
}

.config-actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.config-actions button,
.secondary-button {
  border: 0;
  border-radius: 6px;
  background: #f0c24b;
  color: #17212e;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  padding: 11px 16px;
  text-decoration: none;
}

.config-actions .secondary-button,
.secondary-button {
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.config-status {
  min-height: 22px;
  margin: 4px 0 0;
  color: #91eab0;
}

@media (max-width: 640px) {
  .config-header,
  .config-actions {
    flex-direction: column;
  }

  .config-form label {
    grid-template-columns: 1fr;
  }
}