/* Neon noir. The canvas is sized by render.js; #stage shrink-wraps it so every
   overlay lines up with the letterboxed arena rather than the viewport. */

:root {
  --bg: #07070c;
  --panel: rgba(10, 12, 20, 0.92);
  --cyan: #22d3ee;
  --magenta: #d946ef;
  --green: #22c55e;
  --danger: #f43f5e;
  --text: #e2e8f0;
  --dim: #64748b;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
}

#stage {
  position: relative;
  line-height: 0;
}

canvas {
  display: block;
  background: var(--bg);
  cursor: crosshair;
  box-shadow: 0 0 80px rgba(34, 211, 238, 0.07);
}

.hidden { display: none !important; }

/* --- HUD ------------------------------------------------------------------ */

#hud {
  position: absolute;
  inset: 0;
  padding: 18px 22px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  pointer-events: none;
  line-height: 1.2;
}

.hud-left { width: 300px; }

.bar {
  position: relative;
  height: 20px;
  margin-bottom: 8px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 3px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  width: 100%;
  transition: width 90ms linear;
}

.health .bar-fill {
  background: linear-gradient(90deg, #16a34a, var(--green));
  box-shadow: 0 0 14px rgba(34, 197, 94, 0.55);
}

.health .bar-fill.low {
  background: linear-gradient(90deg, #9f1239, var(--danger));
  box-shadow: 0 0 16px rgba(244, 63, 94, 0.65);
}

.xp { height: 14px; }

.xp .bar-fill {
  width: 0;
  background: linear-gradient(90deg, #a21caf, var(--magenta));
  box-shadow: 0 0 14px rgba(217, 70, 239, 0.55);
}

.bar-label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font: 600 11px/1 var(--mono);
  letter-spacing: 0.08em;
  text-shadow: 0 1px 3px #000;
}

.weapon {
  font: 600 12px/1.4 var(--mono);
  color: var(--dim);
  letter-spacing: 0.06em;
}

.hud-right {
  display: flex;
  gap: 26px;
  text-align: right;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font: 700 22px/1 var(--mono);
}

.stat-label {
  font: 600 10px/1 var(--mono);
  letter-spacing: 0.16em;
  color: var(--dim);
}

/* --- Wave banner ---------------------------------------------------------- */

#banner {
  position: absolute;
  top: 22%;
  left: 0;
  right: 0;
  text-align: center;
  font: 800 54px/1 var(--mono);
  letter-spacing: 0.22em;
  color: var(--cyan);
  text-shadow: 0 0 26px rgba(34, 211, 238, 0.7);
  opacity: 0;
  pointer-events: none;
}

#banner.show { animation: banner 1.6s ease-out; }

@keyframes banner {
  0%   { opacity: 0; transform: scale(0.86); }
  18%  { opacity: 1; transform: scale(1); }
  70%  { opacity: 1; }
  100% { opacity: 0; transform: scale(1.06); }
}

/* --- Screens -------------------------------------------------------------- */

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(3, 4, 8, 0.82);
  backdrop-filter: blur(3px);
  line-height: 1.5;
}

.panel {
  width: min(460px, 86%);
  padding: 34px 38px;
  text-align: center;
  background: var(--panel);
  border: 1px solid rgba(34, 211, 238, 0.22);
  border-radius: 10px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.7), 0 0 44px rgba(34, 211, 238, 0.06);
}

.panel.wide { width: min(860px, 94%); }

h1 {
  margin: 0 0 6px;
  font: 800 40px/0.98 var(--mono);
  letter-spacing: 0.14em;
  color: var(--cyan);
  text-shadow: 0 0 30px rgba(34, 211, 238, 0.55);
}

h1 span { display: block; color: var(--text); }

h2 {
  margin: 0 0 6px;
  font: 800 30px/1 var(--mono);
  letter-spacing: 0.2em;
  color: var(--cyan);
}

h2.dead {
  color: var(--danger);
  text-shadow: 0 0 28px rgba(244, 63, 94, 0.55);
}

h2.levelup-title {
  color: var(--magenta);
  text-shadow: 0 0 28px rgba(217, 70, 239, 0.55);
}

.tagline {
  margin: 0 0 20px;
  font-size: 14px;
  color: var(--dim);
}

.controls {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  text-align: left;
}

.controls li {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.controls span {
  margin-left: auto;
  color: var(--dim);
}

kbd {
  display: inline-block;
  min-width: 22px;
  padding: 3px 6px;
  font: 600 11px/1 var(--mono);
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 4px;
}

.high {
  margin: 0 0 18px;
  font-size: 13px;
  color: var(--dim);
}

.high strong {
  color: var(--magenta);
  font-family: var(--mono);
  font-size: 17px;
}

.record {
  margin: 0 0 12px;
  font: 700 13px/1 var(--mono);
  letter-spacing: 0.18em;
  color: var(--magenta);
  text-shadow: 0 0 20px rgba(217, 70, 239, 0.6);
}

.results {
  display: flex;
  justify-content: center;
  gap: 34px;
  margin: 0 0 24px;
}

.results dt {
  font: 600 10px/1 var(--mono);
  letter-spacing: 0.16em;
  color: var(--dim);
  margin-bottom: 6px;
}

.results dd {
  margin: 0;
  font: 800 26px/1 var(--mono);
  color: var(--text);
}

button.primary {
  padding: 12px 34px;
  font: 700 14px/1 var(--mono);
  letter-spacing: 0.16em;
  color: #04121a;
  background: var(--cyan);
  border: 0;
  border-radius: 6px;
  cursor: pointer;
  box-shadow: 0 0 26px rgba(34, 211, 238, 0.4);
  transition: transform 90ms ease, box-shadow 90ms ease;
}

button.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 36px rgba(34, 211, 238, 0.65);
}

button.primary:active { transform: translateY(0); }

.hint {
  margin: 12px 0 0;
  font-size: 12px;
  color: var(--dim);
}

/* --- Upgrade cards -------------------------------------------------------- */

#upgrade-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
  margin-top: 8px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 18px 20px;
  text-align: left;
  color: var(--text);
  font-family: var(--sans);
  background: rgba(217, 70, 239, 0.05);
  border: 1px solid rgba(217, 70, 239, 0.3);
  border-radius: 8px;
  cursor: pointer;
  transition: transform 110ms ease, border-color 110ms ease, background 110ms ease;
}

.card:hover, .card:focus-visible {
  transform: translateY(-3px);
  background: rgba(217, 70, 239, 0.12);
  border-color: var(--magenta);
  outline: none;
}

.card-key {
  position: absolute;
  top: 8px;
  right: 10px;
  font: 700 11px/1 var(--mono);
  color: var(--magenta);
  opacity: 0.75;
}

.card-name {
  font: 700 16px/1.2 var(--mono);
  letter-spacing: 0.05em;
  color: var(--magenta);
}

.card-desc {
  font-size: 13px;
  color: var(--dim);
}