:root {
  --phosphor: #b6f5a8;
  --phosphor-dim: #6a9a62;
  --screen-bg: #071208;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  background: var(--screen-bg);
  color: var(--phosphor);
  font-family: "Courier New", Courier, monospace;
  overflow: hidden;
  touch-action: none;
  user-select: none;
}

.stage {
  position: relative;
  width: 100%;
  height: 100%;
  background: var(--screen-bg);
}

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

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}

.panel {
  text-align: center;
  pointer-events: auto;
  padding: 16px 24px;
  background: rgba(7, 18, 8, 0.78);
}

.panel.hidden {
  display: none;
}

h1,
h2 {
  margin: 0 0 8px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--phosphor);
  text-shadow: 0 0 12px rgba(160, 255, 140, 0.55);
}

h1 {
  font-size: clamp(28px, 6vw, 48px);
}

h2 {
  font-size: clamp(22px, 4.5vw, 36px);
}

.tagline,
.help,
.hint {
  color: var(--phosphor-dim);
  letter-spacing: 0.06em;
}

.tagline {
  margin: 0 0 28px;
  font-size: 12px;
}

.help {
  margin: 22px 0 0;
  font-size: 12px;
  line-height: 1.6;
}

.hint {
  margin: 0;
  font-size: 18px;
  letter-spacing: 0.18em;
  color: var(--phosphor);
  text-shadow: 0 0 10px rgba(160, 255, 140, 0.5);
  animation: blink 1.2s steps(1, end) infinite;
}

.btn {
  display: block;
  width: min(280px, 72vw);
  margin: 10px auto;
  padding: 12px 18px;
  border: 2px solid var(--phosphor);
  background: rgba(7, 18, 8, 0.72);
  color: var(--phosphor);
  font-family: inherit;
  font-size: 16px;
  letter-spacing: 0.18em;
  cursor: pointer;
  text-shadow: 0 0 8px rgba(160, 255, 140, 0.4);
  box-shadow: 0 0 12px rgba(140, 255, 120, 0.12);
}

.btn:hover,
.btn:focus-visible {
  background: rgba(182, 245, 168, 0.12);
  outline: none;
}

.btn-sm {
  width: auto;
  margin: 0;
  padding: 4px 8px;
  font-size: 10px;
  letter-spacing: 0.12em;
}

input {
  display: block;
  width: min(280px, 72vw);
  margin: 0 auto 8px;
  padding: 10px 12px;
  border: 2px solid var(--phosphor);
  background: rgba(0, 0, 0, 0.35);
  color: var(--phosphor);
  font-family: inherit;
  font-size: 16px;
  letter-spacing: 0.16em;
  text-align: center;
  text-transform: uppercase;
  user-select: text;
  caret-color: var(--phosphor);
  touch-action: manipulation;
}

input:focus {
  outline: none;
  background: rgba(182, 245, 168, 0.08);
}

.error {
  min-height: 1.2em;
  margin: 0 0 8px;
  color: #f0c070;
  font-size: 12px;
  letter-spacing: 0.04em;
}

h3 {
  margin: 14px 0 4px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--phosphor-dim);
}

.lobby-panel {
  width: min(460px, 92%);
  max-height: 92%;
  overflow-y: auto;
  padding: 4px 8px 8px;
  touch-action: pan-y;
}

.lobby-list {
  list-style: none;
  margin: 0 0 8px;
  padding: 0;
  text-align: left;
}

.lobby-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  border-bottom: 1px solid rgba(182, 245, 168, 0.18);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.lobby-empty {
  padding: 6px 0;
  color: var(--phosphor-dim);
  font-size: 12px;
}

.tag {
  margin-left: 6px;
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--phosphor-dim);
}

.score {
  letter-spacing: 0.12em;
  color: var(--phosphor);
}

.tune {
  position: absolute;
  right: 16px;
  bottom: 16px;
  z-index: 5;
  display: grid;
  gap: 8px;
  min-width: 220px;
  padding: 10px 12px;
  background: rgba(7, 18, 8, 0.82);
  border: 1px solid rgba(182, 245, 168, 0.28);
  pointer-events: auto;
  touch-action: manipulation;
  user-select: text;
}

.tune label {
  display: grid;
  grid-template-columns: 52px 1fr 48px;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--phosphor-dim);
}

.tune input[type="range"] {
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  text-transform: none;
}

.tune code {
  font-family: inherit;
  font-size: 12px;
  color: var(--phosphor);
  letter-spacing: 0.04em;
  text-align: right;
}

@keyframes blink {
  0%,
  49% {
    opacity: 1;
  }
  50%,
  100% {
    opacity: 0.15;
  }
}