/* ═══════════════════════════════════════════
   GLOBAL RESET & BASE
   ═══════════════════════════════════════════ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-dark: #1a1a2e;
  --bg-mid: #16213e;
  --bg-light: #0f3460;
  --accent-red: #e63946;
  --accent-yellow: #f4d35e;
  --accent-cyan: #00f5d4;
  --accent-green: #80ed99;
  --accent-magenta: #c77dff;
  --accent-orange: #ff9f1c;
  --text-white: #f0f0f0;
  --text-dim: #8888aa;
  --pixel-border: 4px;
  --font: 'Press Start 2P', monospace;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-dark);
  font-family: var(--font);
  color: var(--text-white);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

/* ═══════════════════════════════════════════
   VIEW SYSTEM
   ═══════════════════════════════════════════ */
.view {
  position: fixed;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1;
}
.view.active {
  display: flex;
}

/* ═══════════════════════════════════════════
   PIXEL BUTTON
   ═══════════════════════════════════════════ */
.pixel-btn {
  font-family: var(--font);
  font-size: 14px;
  padding: 14px 28px;
  border: none;
  color: var(--text-white);
  background: var(--bg-light);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 2px;
  position: relative;
  transition: transform 0.1s, background 0.15s;
  image-rendering: pixelated;

  /* pixel border via box-shadow */
  box-shadow:
    /* outer border */
    -4px 0 0 0 var(--text-white),
     4px 0 0 0 var(--text-white),
     0 -4px 0 0 var(--text-white),
     0  4px 0 0 var(--text-white),
    /* corner fills */
    -4px -4px 0 0 var(--text-white),
     4px -4px 0 0 var(--text-white),
    -4px  4px 0 0 var(--text-white),
     4px  4px 0 0 var(--text-white);
}
.pixel-btn:hover {
  background: var(--accent-cyan);
  color: var(--bg-dark);
  transform: scale(1.05);
}
.pixel-btn:active {
  transform: scale(0.97);
}

/* Colored variants */
.btn-play { background: var(--accent-green); color: var(--bg-dark); }
.btn-play:hover { background: var(--accent-yellow); }
.btn-info { background: var(--accent-cyan); color: var(--bg-dark); }
.btn-info:hover { background: var(--accent-magenta); color: var(--text-white); }
.btn-credits { background: var(--accent-orange); color: var(--bg-dark); }
.btn-credits:hover { background: var(--accent-red); color: var(--text-white); }
.btn-back {
  background: var(--accent-red);
  color: var(--text-white);
  font-size: 10px;
  padding: 10px 18px;
}
.btn-back:hover { background: var(--accent-magenta); }

/* ═══════════════════════════════════════════
   MENU SCREEN
   ═══════════════════════════════════════════ */
#view-menu {
  background: var(--bg-dark);
  overflow: hidden;
}
#menu-bg-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.25;
}
.menu-container {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  padding: 20px;
  text-align: center;
}
.menu-title {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.title-line {
  display: block;
  line-height: 1.4;
}
.title-a {
  font-size: clamp(20px, 5vw, 48px);
  color: var(--accent-cyan);
  text-shadow: 3px 3px 0 var(--accent-magenta);
}
.title-m {
  font-size: clamp(10px, 2.8vw, 28px);
  color: var(--accent-yellow);
  text-shadow: 2px 2px 0 var(--accent-red);
}
.menu-subtitle {
  font-size: clamp(8px, 1.8vw, 16px);
  color: var(--text-dim);
  letter-spacing: 6px;
}
.menu-buttons {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 16px;
}
.menu-buttons .pixel-btn {
  min-width: 220px;
}

/* ═══════════════════════════════════════════
   GAME SCREEN
   ═══════════════════════════════════════════ */
#view-game {
  background: #000;
  justify-content: flex-start;
  align-items: stretch;
}
#game-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
}

/* HUD */
#game-hud {
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 10;
  padding: 10px 14px;
  background: rgba(0,0,0,0.55);
  pointer-events: none;
}
.hud-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.hud-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.hud-label {
  font-size: 8px;
  color: var(--accent-yellow);
}
.hud-value {
  font-size: 12px;
  color: var(--text-white);
}
.hud-hp-text {
  font-size: 8px;
  color: var(--accent-green);
  min-width: 30px;
  text-align: right;
}

/* Health bar */
.health-bar-outer {
  width: clamp(80px, 20vw, 200px);
  height: 14px;
  background: #333;
  position: relative;
  box-shadow:
    -2px 0 0 0 var(--text-white),
     2px 0 0 0 var(--text-white),
     0 -2px 0 0 var(--text-white),
     0  2px 0 0 var(--text-white);
}
.health-bar-inner {
  height: 100%;
  width: 100%;
  background: var(--accent-green);
  transition: width 0.3s, background 0.3s;
}
.health-bar-inner.low {
  background: var(--accent-red);
}
.health-bar-inner.med {
  background: var(--accent-orange);
}

/* Game back button */
.game-back {
  position: absolute;
  bottom: 12px;
  left: 12px;
  z-index: 10;
  font-size: 8px;
  padding: 8px 12px;
  opacity: 0.7;
}
.game-back:hover {
  opacity: 1;
}

/* Overlays */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
  background: rgba(0,0,0,0.8);
}
.overlay.hidden {
  display: none;
}
.overlay-box {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 30px;
}
.overlay-box h2 {
  font-size: clamp(16px, 4vw, 32px);
  color: var(--accent-cyan);
  text-shadow: 3px 3px 0 var(--accent-magenta);
}
.overlay-hint {
  font-size: 10px;
  color: var(--text-dim);
}
.game-over-title {
  color: var(--accent-red) !important;
  text-shadow: 3px 3px 0 #700 !important;
}
.game-over-score, .game-over-level {
  font-size: 12px;
  color: var(--accent-yellow);
}
.win-title {
  color: var(--accent-green) !important;
  text-shadow: 3px 3px 0 #073 !important;
  animation: pulse 0.6s ease-in-out infinite alternate;
}
.win-score {
  font-size: 14px;
  color: var(--accent-yellow);
}
.win-msg {
  font-size: 10px;
  color: var(--accent-cyan);
}

@keyframes pulse {
  from { transform: scale(1); }
  to   { transform: scale(1.08); }
}

/* ═══════════════════════════════════════════
   INFO SCREEN
   ═══════════════════════════════════════════ */
#view-info {
  background: var(--bg-dark);
  overflow-y: auto;
  justify-content: flex-start;
  padding: 40px 16px 80px;
}
.info-container {
  width: 100%;
  max-width: 700px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.section-title {
  font-size: clamp(16px, 4vw, 28px);
  color: var(--accent-cyan);
  text-shadow: 2px 2px 0 var(--accent-magenta);
  margin-bottom: 10px;
}
.cards-wrapper {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Card */
.info-card {
  width: 100%;
  background: var(--bg-mid);
  cursor: pointer;
  overflow: hidden;
  transition: background 0.2s;
  box-shadow:
    -4px 0 0 0 var(--accent-cyan),
     4px 0 0 0 var(--accent-cyan),
     0 -4px 0 0 var(--accent-cyan),
     0  4px 0 0 var(--accent-cyan);
}
.info-card:hover {
  background: var(--bg-light);
}
.info-card.open {
  box-shadow:
    -4px 0 0 0 var(--accent-yellow),
     4px 0 0 0 var(--accent-yellow),
     0 -4px 0 0 var(--accent-yellow),
     0  4px 0 0 var(--accent-yellow);
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
}
.card-header-title {
  font-size: clamp(8px, 2vw, 12px);
  color: var(--accent-yellow);
}
.card-header-icon {
  font-size: 12px;
  color: var(--accent-cyan);
  transition: transform 0.3s;
}
.info-card.open .card-header-icon {
  transform: rotate(90deg);
}
.card-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.info-card.open .card-body {
  max-height: 600px;
}
.card-body-inner {
  padding: 0 16px 16px;
  font-size: clamp(7px, 1.4vw, 10px);
  line-height: 2;
  color: var(--text-dim);
}

/* ═══════════════════════════════════════════
   CREDITS SCREEN
   ═══════════════════════════════════════════ */
#view-credits {
  background: #000;
  overflow: hidden;
}
.credits-starfield {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.credits-star {
  position: absolute;
  background: var(--text-white);
  animation: twinkle 2s ease-in-out infinite alternate;
}
@keyframes twinkle {
  0%   { opacity: 0.2; }
  100% { opacity: 1; }
}
.credits-scroll-wrapper {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 1;
  display: flex;
  justify-content: center;
}
.credits-scroll {
  position: absolute;
  top: 100%;
  text-align: center;
  animation: scrollCredits 22s linear forwards;
  padding: 0 20px;
}
.credits-scroll.paused {
  animation-play-state: paused;
}
@keyframes scrollCredits {
  0%   { top: 100%; }
  100% { top: -160%; }
}
.credits-label {
  font-size: clamp(8px, 1.6vw, 12px);
  color: var(--accent-yellow);
  margin-bottom: 10px;
  letter-spacing: 4px;
}
.credits-name {
  font-size: clamp(14px, 3.5vw, 28px);
  color: var(--accent-cyan);
  text-shadow: 2px 2px 0 var(--accent-magenta);
  margin-bottom: 10px;
}
.credits-item {
  font-size: clamp(9px, 2vw, 14px);
  color: var(--text-white);
  margin-bottom: 6px;
}
.credits-name.thanks {
  color: var(--accent-green);
  text-shadow: 2px 2px 0 var(--accent-yellow);
  animation: pulse 0.8s ease-in-out infinite alternate;
}
.credits-back-btn {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  opacity: 0.7;
  font-size: 8px;
}
.credits-back-btn:hover {
  opacity: 1;
}

/* ═══════════════════════════════════════════
   LETTER POP PARTICLES (canvas-rendered, but
   score popup is DOM for simplicity)
   ═══════════════════════════════════════════ */
.score-popup {
  position: absolute;
  font-family: var(--font);
  font-size: 14px;
  color: var(--accent-yellow);
  pointer-events: none;
  z-index: 15;
  animation: floatUp 0.7s ease-out forwards;
  text-shadow: 2px 2px 0 var(--accent-red);
}
@keyframes floatUp {
  0%   { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(-60px) scale(1.4); }
}

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */
@media (max-width: 600px) {
  .pixel-btn {
    font-size: 11px;
    padding: 12px 20px;
  }
  .menu-buttons .pixel-btn {
    min-width: 180px;
  }
  #game-hud {
    padding: 6px 8px;
  }
  .hud-label { font-size: 6px; }
  .hud-value { font-size: 9px; }
  .hud-hp-text { font-size: 6px; }
  .health-bar-outer { height: 10px; }
  .game-back { font-size: 7px; padding: 6px 10px; }
  .card-header { padding: 12px 12px; }
  .card-body-inner { line-height: 1.8; }
}