* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: #fff0db;
  color: #0f4c81;
  font-family: 'DM Sans', sans-serif;
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  -webkit-user-select: none;
  user-select: none;
}

canvas {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
}

/* ── Screens ── */

.screen {
  position: fixed;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 20;
  background: #fff0db;
  padding: 1.5rem;
}

.screen.active {
  display: flex;
  animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.screen p {
  font-size: 1rem;
  line-height: 1.5;
  opacity: 0.6;
  max-width: 280px;
  text-align: center;
  margin-bottom: 1.5rem;
}

/* ── Controls hint ── */

.controls-hint {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 2rem;
  font-size: 0.85rem;
  opacity: 0.45;
}

kbd {
  display: inline-block;
  background: rgba(15, 76, 129, 0.08);
  border-radius: 4px;
  padding: 2px 7px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  font-size: 0.8rem;
  margin: 0 2px;
}

/* ── Buttons ── */

button {
  background: #0f4c81;
  color: #fff0db;
  border: none;
  border-radius: 6px;
  padding: 0.75rem 2rem;
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}

button:hover {
  transform: scale(1.04);
  opacity: 0.88;
}

button:active {
  transform: scale(0.97);
}

/* ── Game Over ── */

#gameover h1 {
  font-size: 4.5rem;
  margin-bottom: 0.25rem;
}

#gameover .subtitle {
  font-size: 0.9rem;
  opacity: 0.4;
  margin-bottom: 2rem;
}

/* ── Bottom Legend ── */

#legend {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 15;
  background: #fff0db;
  padding: 10px 0 16px;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

#legend.visible {
  display: flex;
}

#slow-bar-track {
  width: 236px;
  height: 6px;
  background: rgba(15, 76, 129, 0.1);
  border-radius: 3px;
  position: relative;
  overflow: hidden;
}

#slow-bar-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  border-radius: 3px;
  background: #0f4c81;
  opacity: 0.3;
  width: 100%;
  transition: width 0.05s linear;
}

#slow-dots {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: space-evenly;
}

#slow-dots.visible {
  display: flex;
}

.slow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #0f4c81;
  opacity: 0.1;
  transition: opacity 0.15s ease;
}

.slow-dot.filled {
  opacity: 0.45;
}

#legend-keys {
  display: flex;
  gap: 10px;
}

.legend-key {
  width: 72px;
  height: 28px;
  border: none;
  border-radius: 6px;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.12s ease;
  -webkit-tap-highlight-color: transparent;
}

.legend-key:hover {
  transform: none;
}

.legend-key:active {
  transform: scale(0.96);
}

.lk-label {
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  font-size: 14px;
  color: #fff0db;
  pointer-events: none;
}

/* ── Touch Controls ── */

#touch {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
}

.tc-row {
  position: absolute;
  display: flex;
  gap: 12px;
  align-items: center;
  pointer-events: auto;
}

.tc-top {
  top: 16px;
  right: 20px;
}

.tc-bottom {
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
}

.tc-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(15, 76, 129, 0.1);
  color: #0f4c81;
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.tc-btn:hover {
  transform: none;
  opacity: 1;
}

.tc-btn:active {
  background: rgba(15, 76, 129, 0.22);
  transform: scale(0.93);
}

.tc-jump {
  width: 56px;
  height: 56px;
  font-size: 1.5rem;
}

.tc-color {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

/* Show touch controls on touch-primary devices */
.has-touch #touch.visible {
  display: block;
}

/* ── Responsive ── */

@media (max-width: 600px) {
  h1 { font-size: 2.4rem; }
  #gameover h1 { font-size: 3.5rem; }

  .controls-hint {
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
  }
}