/* ============================================================
   RADAR INTERCEPT — stylesheet
   Military air-defense command aesthetic: black, phosphor green
   ============================================================ */

:root {
  --green: #66ff99;
  --green-dim: rgba(102, 255, 153, 0.55);
  --green-faint: rgba(102, 255, 153, 0.18);
  --panel-bg: rgba(0, 20, 8, 0.78);
  --red: #ff4d4d;
  --yellow: #ffe14d;
  --font: "Courier New", Courier, monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000000;
  font-family: var(--font);
  color: var(--green);
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

#game-canvas {
  position: fixed;
  inset: 0;
  display: block;
  background: #000000;
  cursor: crosshair;
}

.hidden { display: none !important; }

/* ============ HUD panels ============ */

#hud {
  position: fixed;
  inset: 0;
  pointer-events: none; /* clicks fall through to the canvas… */
  z-index: 10;
}

#hud button { pointer-events: auto; } /* …except the buttons */

.hud-panel {
  position: absolute;
  min-width: 175px;
  padding: 10px 14px;
  background: var(--panel-bg);
  border: 1px solid var(--green-dim);
  box-shadow: 0 0 12px rgba(102, 255, 153, 0.15), inset 0 0 18px rgba(102, 255, 153, 0.05);
  font-size: 13px;
  letter-spacing: 1px;
}

.hud-top-left  { top: 12px; left: 12px; }
.hud-top-right { top: 12px; right: 12px; }

.hud-target {
  bottom: 86px;
  left: 12px;
  min-width: 235px;
  border-color: var(--green);
  animation: lockPulse 1s infinite;
}

.tgt-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin: 3px 0;
  font-size: 12px;
  white-space: nowrap;
}

.tgt-row .tgt-idx { opacity: 0.55; }
.tgt-row.missile .tgt-type { color: var(--red); }
.tgt-row.drone .tgt-type { color: var(--yellow); }
.tgt-row.engaged { opacity: 0.6; }
.tgt-row .tgt-eng { color: #ffb84d; }

@keyframes lockPulse {
  0%, 100% { box-shadow: 0 0 6px rgba(102, 255, 153, 0.25); }
  50%      { box-shadow: 0 0 18px rgba(102, 255, 153, 0.7); }
}

.hud-title {
  font-size: 15px;
  font-weight: bold;
  margin-bottom: 6px;
  text-shadow: 0 0 8px var(--green);
}

.hud-title.small { font-size: 12px; }

.hud-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin: 3px 0;
}

.hud-row span:first-child { opacity: 0.65; }

.hud-row-small {
  font-size: 10px;
  opacity: 0.6;
  margin-top: 3px;
  text-align: right;
}

.hud-bar {
  width: 100%;
  height: 7px;
  margin: 4px 0 2px;
  background: rgba(102, 255, 153, 0.12);
  border: 1px solid var(--green-faint);
}

.hud-bar-fill {
  height: 100%;
  width: 100%;
  transition: width 0.12s linear;
}

.hud-bar-fill.health { background: var(--green); box-shadow: 0 0 8px var(--green); }
.hud-bar-fill.health.low { background: var(--red); box-shadow: 0 0 8px var(--red); }
.hud-bar-fill.reload { background: var(--green-dim); width: 0%; }

/* ============ Bottom controls ============ */

#controls {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 14px;
  align-items: center;
}

.ctl-btn {
  font-family: var(--font);
  font-size: 15px;
  letter-spacing: 2px;
  padding: 12px 26px;
  color: var(--green);
  background: var(--panel-bg);
  border: 1px solid var(--green-dim);
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
}

.ctl-btn:hover:not(:disabled) {
  background: rgba(102, 255, 153, 0.15);
  box-shadow: 0 0 14px rgba(102, 255, 153, 0.5);
}

.ctl-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.ctl-btn.fire {
  font-weight: bold;
  font-size: 18px;
  padding: 14px 44px;
  border-width: 2px;
}

.ctl-btn.fire:not(:disabled) {
  border-color: var(--green);
  text-shadow: 0 0 10px var(--green);
  animation: firePulse 1.4s infinite;
}

@keyframes firePulse {
  0%, 100% { box-shadow: 0 0 6px rgba(102, 255, 153, 0.3); }
  50%      { box-shadow: 0 0 20px rgba(102, 255, 153, 0.8); }
}

/* ============ Round banner ============ */

#round-banner {
  position: absolute;
  top: 18%;
  left: 50%;
  transform: translateX(-50%);
  font-size: clamp(28px, 6vw, 54px);
  font-weight: bold;
  letter-spacing: 10px;
  color: var(--green);
  text-shadow: 0 0 24px var(--green);
  animation: bannerIn 0.4s ease-out;
  white-space: nowrap;
}

@keyframes bannerIn {
  from { opacity: 0; transform: translateX(-50%) scale(1.4); }
  to   { opacity: 1; transform: translateX(-50%) scale(1); }
}

/* ============ Overlay screens (menu / game over) ============ */

.overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 20px;
  background: radial-gradient(circle at center, rgba(0, 30, 12, 0.92) 0%, rgba(0, 0, 0, 0.97) 75%);
  overflow-y: auto;
  text-align: center;
}

.game-title {
  font-size: clamp(30px, 7vw, 62px);
  letter-spacing: 12px;
  text-shadow: 0 0 26px var(--green);
}

.game-title.danger {
  color: var(--red);
  text-shadow: 0 0 26px var(--red);
}

.subtitle {
  font-size: clamp(11px, 2.4vw, 15px);
  letter-spacing: 4px;
  opacity: 0.7;
}

.system-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  justify-content: center;
  max-width: 900px;
}

.system-card {
  width: 320px;
  max-width: 92vw;
  padding: 20px;
  text-align: left;
  background: var(--panel-bg);
  border: 1px solid var(--green-dim);
  box-shadow: 0 0 16px rgba(102, 255, 153, 0.12);
  transition: box-shadow 0.2s, border-color 0.2s;
}

.system-card:hover {
  border-color: var(--green);
  box-shadow: 0 0 26px rgba(102, 255, 153, 0.4);
}

.system-card h2 {
  letter-spacing: 4px;
  margin-bottom: 10px;
  text-shadow: 0 0 10px var(--green);
}

.system-card ul {
  list-style: none;
  font-size: 13px;
  line-height: 1.8;
  opacity: 0.85;
}

.system-card ul li::before { content: "▸ "; color: var(--green-dim); }

.mode-select { margin-top: 12px; }

.mode-label {
  font-size: 11px;
  letter-spacing: 2px;
  opacity: 0.6;
}

.mode-btns {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}

.mode-opt {
  flex: 1;
  font-family: var(--font);
  font-size: 11px;
  padding: 7px 4px;
  color: var(--green);
  background: transparent;
  border: 1px solid var(--green-faint);
  cursor: pointer;
  letter-spacing: 1px;
}

.mode-opt.selected {
  background: rgba(102, 255, 153, 0.18);
  border-color: var(--green);
  box-shadow: 0 0 8px rgba(102, 255, 153, 0.4);
}

.select-btn {
  width: 100%;
  margin-top: 16px;
  font-weight: bold;
}

.hint {
  font-size: 12px;
  line-height: 1.7;
  opacity: 0.55;
  letter-spacing: 1px;
  max-width: 560px;
}

/* ============ Game over ============ */

.go-line { letter-spacing: 5px; opacity: 0.75; }

.go-stats {
  min-width: 260px;
  padding: 14px 20px;
  background: var(--panel-bg);
  border: 1px solid var(--green-dim);
  font-size: 16px;
}

/* ============ Small screens ============ */

@media (max-width: 640px) {
  .hud-panel { min-width: 138px; font-size: 11px; padding: 8px 10px; }
  .hud-title { font-size: 12px; }
  .hud-target { bottom: 96px; }
  .ctl-btn { font-size: 12px; padding: 10px 16px; }
  .ctl-btn.fire { font-size: 15px; padding: 12px 30px; }
}