html,
body {
  margin: 0;
  min-height: 100%;
  background: linear-gradient(180deg, #ffe7ef 0%, #fff7cf 100%);
  font-family: "Trebuchet MS", "Verdana", sans-serif;
}

body {
  display: grid;
  place-items: center;
}

.dev-menu-toggle {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 20;
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  font: 700 18px "Trebuchet MS", "Verdana", sans-serif;
  color: #fff;
  background: linear-gradient(180deg, #5e315b 0%, #8c487b 100%);
  box-shadow: 0 12px 28px rgba(94, 49, 91, 0.28);
  cursor: pointer;
}

.dev-menu {
  position: fixed;
  top: 62px;
  left: 14px;
  z-index: 20;
  width: min(280px, calc(100vw - 28px));
  padding: 16px;
  border: 4px solid #5e315b;
  border-radius: 20px;
  background: rgba(255, 248, 252, 0.98);
  box-shadow: 0 22px 46px rgba(94, 49, 91, 0.24);
  box-sizing: border-box;
  display: grid;
  gap: 10px;
}

.dev-menu[hidden] {
  display: none;
}

.dev-menu h2 {
  margin: 0 0 4px;
  color: #5e315b;
  font: 700 24px "Trebuchet MS", "Verdana", sans-serif;
}

.dev-subtitle {
  margin: 6px 0 0;
  color: #8c487b;
  font: 700 16px "Trebuchet MS", "Verdana", sans-serif;
}

.dev-field,
.dev-check {
  display: grid;
  gap: 6px;
  color: #5e315b;
  font: 700 15px "Trebuchet MS", "Verdana", sans-serif;
}

.dev-field input,
.dev-field select {
  width: 100%;
  box-sizing: border-box;
  border: 2px solid #caa4c8;
  border-radius: 12px;
  padding: 10px 12px;
  font: 700 15px "Trebuchet MS", "Verdana", sans-serif;
  color: #5e315b;
  background: #fff;
}

.dev-field input[type="color"] {
  min-height: 46px;
  padding: 6px;
}

.dev-check {
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 10px;
}

.dev-btn {
  border: 0;
  border-radius: 14px;
  padding: 10px 14px;
  font: 700 16px "Trebuchet MS", "Verdana", sans-serif;
  color: #fff;
  background: linear-gradient(180deg, #ff6d92 0%, #d94872 100%);
  box-shadow: 0 10px 22px rgba(217, 72, 114, 0.22);
  cursor: pointer;
}

.app-shell {
  width: 100%;
  display: grid;
  place-items: center;
  gap: 12px;
  padding: 16px;
  box-sizing: border-box;
}

canvas {
  width: min(97vw, 1200px);
  height: auto;
  aspect-ratio: 5 / 3;
  border: 6px solid #5e315b;
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(94, 49, 91, 0.22);
  background: #f6fbff;
}

.controls-row {
  width: min(97vw, 1200px);
  display: flex;
  justify-content: center;
}

.action-btn {
  border: 0;
  border-radius: 999px;
  padding: 12px 26px;
  font: 700 22px "Trebuchet MS", "Verdana", sans-serif;
  color: #fff;
  background: linear-gradient(180deg, #59c7ff 0%, #2d89d1 100%);
  box-shadow: 0 12px 26px rgba(45, 137, 209, 0.28);
  cursor: pointer;
}

.action-btn[hidden] {
  display: none;
}