/* SKYWARD BASTION — styles (owner: Haise). Contract: docs/contract.md §8.
   Neo-brutalist: thick black borders, hard offset shadows (never blurred),
   chunky system type, visible grid, subtle teal. No glow, no external assets. */

:root {
  --teal-light: #9fc9c2;
  --teal-mid: #3f7f78;
  --teal-dark: #1d3532;
  --ink: #0b1514;
  --black: #000;
  --paper: #e6f0ee;
  --accent: #e0a43a;
  --border-w: 4px;
  --shadow: 6px 6px 0 #000;
  --shadow-sm: 3px 3px 0 #000;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --grid-size: 24px;
  --grid-line: rgba(11, 21, 20, 0.14);
}

[hidden] { display: none !important; }

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

html, body { margin: 0; padding: 0; }

body {
  min-height: 100vh;
  font-family: var(--font);
  color: var(--ink);
  background-color: var(--teal-light);
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
  -webkit-font-smoothing: antialiased;
}

#app {
  width: min(100%, 1240px);
  margin: 0 auto;
  padding: 16px 20px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

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

#hud {
  width: min(100%, 1200px);
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 12px;
  padding: 10px 12px;
  background: var(--paper);
  border: var(--border-w) solid var(--black);
  box-shadow: var(--shadow);
}

.brand {
  margin: 0;
  padding: 6px 12px;
  display: flex;
  align-items: center;
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--teal-dark);
  border: var(--border-w) solid var(--black);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
}

.hud-stats {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.stat {
  min-width: 72px;
  padding: 4px 10px;
  background: var(--teal-light);
  border: 3px solid var(--black);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.stat dt {
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal-dark);
}

.stat dd {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

#batteries {
  display: flex;
  gap: 8px;
  margin-left: auto;
}

.battery-panel {
  position: relative;
  min-width: 78px;
  padding: 4px 10px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--paper);
  border: 3px solid var(--black);
  box-shadow: var(--shadow-sm);
}

.battery-label {
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal-dark);
}

.battery-ammo {
  font-size: 1.2rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.battery-panel.is-selected {
  background: var(--accent);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--black);
}

.battery-panel.is-selected .battery-label { color: var(--ink); }

.battery-panel.is-empty {
  background-image: repeating-linear-gradient(
    -45deg, transparent 0 6px, rgba(0, 0, 0, 0.16) 6px 9px);
}

.battery-panel.is-empty .battery-ammo { color: var(--teal-mid); }

.battery-panel.is-destroyed {
  background: var(--teal-dark);
  color: var(--paper);
}

.battery-panel.is-destroyed .battery-label { color: var(--teal-light); }

.battery-panel.is-destroyed .battery-ammo { text-decoration: line-through; }

.battery-panel.is-selected.is-destroyed {
  outline: 3px solid var(--accent);
  outline-offset: -7px;
}

#mute-btn {
  align-self: center;
  padding: 10px 14px;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--paper);
  border: var(--border-w) solid var(--black);
  border-radius: 0;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

#mute-btn[data-muted="true"] {
  background: var(--teal-light);
  color: var(--teal-dark);
}

#mute-btn[data-muted="false"] {
  background: var(--teal-mid);
  color: var(--paper);
}

#mute-btn:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--black); }
#mute-btn:active { transform: translate(3px, 3px); box-shadow: 0 0 0 var(--black); }
#mute-btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

/* ---------------------------------------------------------------- stage + canvas */

#stage {
  position: relative;
  aspect-ratio: 960 / 600;
  width: min(100%, 1200px);
  /* Keep the whole field on screen on short viewports (aspect preserved). */
  max-width: max(320px, calc((100vh - 220px) * 1.6));
  background: var(--ink);
  border: var(--border-w) solid var(--black);
  box-shadow: var(--shadow);
  overflow: hidden;
}

#game-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

/* ---------------------------------------------------------------- overlays */

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(29, 53, 50, 0.45); /* flat wash, no blur */
  pointer-events: none;
}

.overlay * { pointer-events: none; }

.overlay-card {
  width: min(92%, 520px);
  padding: 22px 26px;
  text-align: center;
  background: var(--paper);
  border: var(--border-w) solid var(--black);
  box-shadow: var(--shadow);
}

.overlay-card h2 {
  margin: 0 0 12px;
  padding: 6px 10px;
  font-size: clamp(1.4rem, 3.4vw, 2.3rem);
  font-weight: 900;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--teal-dark);
  border: var(--border-w) solid var(--black);
  box-shadow: var(--shadow-sm);
}

.overlay-card p {
  margin: 8px 0;
  font-weight: 700;
}

.overlay-tagline {
  font-size: 1.05rem;
  font-weight: 800;
}

.overlay-cta {
  display: inline-block;
  margin-top: 12px !important;
  padding: 8px 14px;
  font-weight: 900 !important;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--teal-light);
  border: 3px solid var(--black);
  box-shadow: var(--shadow-sm);
}

.overlay-hint {
  font-size: 0.78rem;
  font-weight: 800 !important;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal-dark);
}

#title-high, #final-score, #final-high, #final-wave, #tally-wave, #tally-mult {
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

.tally {
  width: 100%;
  margin: 10px 0;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
  border: 3px solid var(--black);
}

.tally th, .tally td {
  padding: 6px 10px;
  border-bottom: 2px solid var(--black);
  font-weight: 800;
  text-transform: uppercase;
}

.tally th { text-align: left; font-size: 0.85rem; }
.tally td { text-align: right; }

.tally-total-row th, .tally-total-row td {
  background: var(--teal-dark);
  color: var(--paper);
  font-weight: 900;
  border-bottom: 0;
}

#tally-bonus-city, #new-high {
  display: inline-block;
  padding: 6px 12px;
  font-weight: 900 !important;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--accent);
  border: 3px solid var(--black);
  box-shadow: var(--shadow-sm);
}

#tally-bonus-city { background: var(--teal-light); }

/* ---------------------------------------------------------------- wave banner */

#wave-banner {
  position: absolute;
  top: 14%;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 22px;
  font-size: clamp(1.1rem, 3vw, 2rem);
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--paper);
  background: var(--teal-dark);
  border: var(--border-w) solid var(--black);
  box-shadow: var(--shadow);
  pointer-events: none;
}

/* ---------------------------------------------------------------- help footer */

#help {
  width: min(100%, 1200px);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding: 10px 14px;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--paper);
  border: var(--border-w) solid var(--black);
  box-shadow: var(--shadow);
}

kbd {
  display: inline-block;
  min-width: 1.6em;
  margin-right: 3px;
  padding: 1px 6px;
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 900;
  text-align: center;
  background: var(--teal-light);
  border: 2px solid var(--black);
  box-shadow: 2px 2px 0 var(--black);
}

/* ---------------------------------------------------------------- small screens */

@media (max-width: 720px) {
  #app { padding: 10px 10px 18px; gap: 12px; }
  #hud { gap: 8px; padding: 8px; }
  .brand { width: 100%; justify-content: center; }
  #batteries { margin-left: 0; }
  .stat, .battery-panel { min-width: 60px; padding: 3px 7px; }
  .stat dd, .battery-ammo { font-size: 1rem; }
  .overlay-card { padding: 14px 16px; }
}