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

body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family:
    "SFMono-Regular", "SF Mono", Monaco, Menlo, Consolas, "Liberation Mono",
    "Courier New", monospace;
  background: #000;
  color: #f5faff;
}

:root {
  --panel-bg: rgba(8, 28, 48, 0.82);
  --panel-border: rgba(94, 176, 255, 0.55);
  --panel-text: #d9f2ff;
  --panel-accent: #8fd0ff;
}

button,
input,
textarea,
select {
  font: inherit;
}

#p5-container {
  width: 100%;
  height: 100%;
}

/* Start Overlay */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  backdrop-filter: blur(10px);
  transition:
    opacity 0.8s ease-out,
    visibility 0.8s ease-out;
}

.overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.overlay-content {
  text-align: center;
  color: #fff;
  animation: fadeInUp 1s ease-out;
}

.overlay-content h1 {
  font-size: 3.5rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  margin-bottom: 1rem;
  color: #dff5ff;
  text-transform: uppercase;
}

.overlay-content h2 {
  font-size: 2.8rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  margin: 1rem 0;
  color: #f5faff;
  text-transform: uppercase;
}

.overlay-content p {
  font-size: 1.1rem;
  font-weight: 300;
  margin: 0.5rem 0;
  opacity: 0.8;
  color: #c7e7ff;
}

.overlay-content .instructions {
  margin: 2rem 0;
  font-size: 0.95rem;
  opacity: 0.6;
  color: #f5faff;
}

.start-btn {
  margin-top: 2rem;
  padding: 0.75rem 2.5rem;
  font-size: 1rem;
  background: rgba(8, 28, 48, 0.92);
  color: #f5faff;
  border: 1px solid rgba(94, 176, 255, 0.7);
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease,
    background-color 0.3s ease,
    border-color 0.3s ease;
  box-shadow: 0 0 16px rgba(0, 153, 255, 0.18);
}

.start-btn:hover {
  transform: translateY(-1px);
  background: rgba(12, 38, 66, 0.96);
  border-color: rgba(124, 196, 255, 0.9);
  box-shadow: 0 0 20px rgba(0, 153, 255, 0.24);
}

.start-btn:active {
  transform: translateY(0);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Controls */
.controls {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  display: flex;
  gap: 10px;
  align-items: center;
  transition: opacity 0.3s;
}

.controls.hidden {
  opacity: 0;
  pointer-events: none;
}

.control-btn {
  padding: 0.5rem 1rem;
  background: rgba(8, 28, 48, 0.82);
  border: 1px solid rgba(94, 176, 255, 0.55);
  color: #ccecff;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  transition:
    background-color 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease,
    color 0.3s ease;
}

.control-btn:hover {
  background: rgba(12, 38, 66, 0.92);
  border-color: rgba(124, 196, 255, 0.8);
  color: #f5faff;
  box-shadow: 0 0 12px rgba(0, 153, 255, 0.2);
}

.status {
  color: #8fd0ff;
  font-size: 0.9rem;
  opacity: 0.7;
}

.hud {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 100;
  display: grid;
  grid-template-columns: repeat(2, minmax(120px, 1fr));
  gap: 10px;
  transition: opacity 0.3s ease;
}

.hud.hidden {
  opacity: 0;
  pointer-events: none;
}

.hud-card {
  min-width: 120px;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  background: var(--panel-bg);
  box-shadow: 0 0 18px rgba(0, 153, 255, 0.12);
}

.hud-label {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(217, 242, 255, 0.65);
}

.hud-value {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--panel-text);
}

/* Info */
.info {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  color: rgba(223, 245, 255, 0.7);
  font-size: 0.9rem;
  text-align: center;
  transition: opacity 0.3s;
}

.info.hidden {
  opacity: 0;
  pointer-events: none;
}

@media (max-width: 700px) {
  .overlay-content {
    width: min(90vw, 420px);
    padding: 0 1rem;
  }

  .overlay-content h1 {
    font-size: 2.4rem;
  }

  .overlay-content h2 {
    font-size: 2rem;
  }

  .controls {
    top: auto;
    right: 16px;
    bottom: 72px;
  }

  .hud {
    top: 16px;
    left: 16px;
    right: 16px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hud-card {
    min-width: 0;
  }

  .info {
    width: min(88vw, 420px);
    bottom: 18px;
  }
}

/* Scrollbar styling (if needed) */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(0, 212, 255, 0.3);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 212, 255, 0.5);
}