* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
}

:root {
  --bg-dark: #070b14;
  --panel-bg: rgba(9, 17, 32, 0.84);
  --panel-border: rgba(0, 240, 255, 0.42);
  --cyan: #00f0ff;
  --magenta: #ff2a85;
  --amber: #ffaa00;
  --crimson: #ff2846;
  --emerald: #00ffaa;
  --purple: #c840ff;
  --text-main: #e8f7ff;
  --text-dim: #88acc4;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
}

#app-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

#game-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: none;
}

#custom-crosshair {
  position: fixed;
  width: 44px;
  height: 44px;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.85));
  transition: transform 0.05s ease-out;
}

.hidden {
  display: none !important;
}

/* ==================== HUD LAYER ==================== */
#hud-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 20;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 14px 18px;
}

.hud-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
  flex-wrap: wrap;
}

.hud-panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  box-shadow: 0 0 22px rgba(0, 240, 255, 0.16), inset 0 0 15px rgba(0, 240, 255, 0.07);
  border-radius: 12px;
  padding: 10px 14px;
  backdrop-filter: blur(8px);
  pointer-events: auto;
}

/* Vitals Panel (Left) */
.vitals-panel {
  min-width: 280px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stat-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.hud-icon {
  width: 38px;
  height: 38px;
  object-fit: contain;
  flex-shrink: 0;
}

.hud-icon-sm {
  width: 28px;
  height: 28px;
  object-fit: contain;
  flex-shrink: 0;
}

.bar-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--text-dim);
}

.bar-track {
  width: 100%;
  height: 11px;
  background: rgba(5, 10, 20, 0.9);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.bar-fill {
  height: 100%;
  transition: width 0.15s ease-out;
}

.hp-fill {
  background: linear-gradient(90deg, #b80f2e, #ff2a55, #ff6b8b);
  box-shadow: 0 0 10px rgba(255, 42, 85, 0.8);
}

.shield-fill {
  background: linear-gradient(90deg, #0077b6, #00f0ff, #90f8ff);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.8);
}

.credits-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding-top: 4px;
  border-top: 1px solid rgba(0, 240, 255, 0.18);
}

.credit-badge, .ammo-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 800;
  font-size: 15px;
}

.credit-badge span {
  color: var(--amber);
}

.credit-badge small {
  font-size: 10px;
  color: var(--text-dim);
}

.ammo-badge span {
  color: var(--cyan);
  font-family: monospace;
  font-size: 15px;
}

/* Center Wave & Score Panel */
.center-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.wave-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.metric-chip {
  display: flex;
  align-items: center;
  gap: 8px;
}

.metric-chip small {
  display: block;
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--text-dim);
}

.metric-chip strong {
  font-size: 18px;
  color: #ffffff;
  font-weight: 800;
}

.score-chip strong {
  color: var(--amber);
}

.combo-banner {
  background: linear-gradient(90deg, rgba(255, 42, 133, 0.25), rgba(0, 240, 255, 0.25));
  border: 1px solid var(--magenta);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.2px;
  padding: 3px 12px;
  border-radius: 99px;
  box-shadow: 0 0 12px rgba(255, 42, 133, 0.5);
}

.combo-banner span {
  color: var(--amber);
  font-size: 13px;
}

/* Right Actions Panel */
.actions-panel {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  background: rgba(12, 26, 48, 0.9);
  border: 1px solid rgba(0, 240, 255, 0.4);
  border-radius: 10px;
  padding: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--text-main);
  font-weight: 700;
  font-size: 12px;
  transition: all 0.15s ease;
}

.icon-btn img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.icon-btn:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
  box-shadow: 0 0 14px rgba(0, 240, 255, 0.45);
}

.shop-highlight {
  padding-right: 12px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.18), rgba(0, 180, 140, 0.22));
  border-color: var(--emerald);
}

/* Boss HUD */
.boss-hud {
  align-self: center;
  width: min(640px, 92vw);
  background: rgba(24, 6, 16, 0.88);
  border: 2px solid var(--crimson);
  box-shadow: 0 0 28px rgba(255, 40, 70, 0.55);
  border-radius: 14px;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.boss-portrait {
  width: 58px;
  height: 58px;
  object-fit: contain;
  filter: drop-shadow(0 0 8px rgba(255, 40, 70, 0.8));
}

.boss-bar-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.boss-title-row {
  display: flex;
  justify-content: space-between;
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 1.2px;
  color: #ff99aa;
}

.boss-track {
  height: 14px;
  border-color: rgba(255, 60, 90, 0.5);
}

.boss-fill {
  background: linear-gradient(90deg, #7a0018, #ff1e42, #ff9900);
  box-shadow: 0 0 14px rgba(255, 30, 66, 0.9);
}

/* Wave Announcement */
.wave-announce {
  align-self: center;
  background: rgba(8, 16, 32, 0.92);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 36px rgba(0, 240, 255, 0.5);
  border-radius: 16px;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  gap: 16px;
  animation: pulsePop 0.35s ease-out;
}

.announce-icon {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.wave-announce h2 {
  font-size: 24px;
  letter-spacing: 2px;
  color: var(--cyan);
}

.wave-announce p {
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--amber);
  font-weight: 700;
}

@keyframes pulsePop {
  0% { transform: scale(0.8); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

/* Bottom HUD */
.hud-bottom {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 14px;
}

.weapons-dock, .skills-dock {
  display: flex;
  gap: 10px;
  pointer-events: auto;
}

.weapon-slot {
  position: relative;
  background: var(--panel-bg);
  border: 1px solid rgba(0, 240, 255, 0.32);
  border-radius: 12px;
  padding: 6px 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  color: var(--text-main);
  transition: all 0.15s ease;
}

.weapon-slot img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.weapon-slot.active {
  border-color: var(--cyan);
  background: rgba(0, 240, 255, 0.18);
  box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
  transform: translateY(-3px);
}

.weapon-slot.locked {
  opacity: 0.48;
  filter: grayscale(0.65);
}

.slot-key {
  position: absolute;
  top: -7px;
  left: 7px;
  background: #0c1b33;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-size: 10px;
  font-weight: 800;
  padding: 1px 5px;
  border-radius: 4px;
}

.slot-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}

.slot-info strong {
  font-size: 11px;
  letter-spacing: 0.6px;
}

.slot-info small {
  font-size: 10px;
  color: var(--amber);
  font-weight: 700;
}

.skill-btn {
  position: relative;
  width: 68px;
  height: 74px;
  background: var(--panel-bg);
  border: 1px solid rgba(0, 240, 255, 0.4);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  cursor: pointer;
  color: var(--text-main);
  overflow: hidden;
  transition: all 0.15s ease;
}

.skill-btn img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.skill-btn small {
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.skill-btn:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.45);
}

.cooldown-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 0%;
  background: rgba(0, 0, 0, 0.72);
  pointer-events: none;
  transition: height 0.1s linear;
}

/* ==================== OVERLAY SCREENS & MENU ==================== */
.overlay-screen {
  position: absolute;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow-y: auto;
}

.menu-bg-layer {
  position: absolute;
  inset: 0;
  background: url('assets/menu_bg.jpg') center center / cover no-repeat;
  filter: brightness(0.42) contrast(1.12);
  z-index: -1;
}

.menu-content {
  width: min(980px, 96vw);
  background: rgba(8, 14, 28, 0.88);
  border: 1px solid rgba(0, 240, 255, 0.48);
  box-shadow: 0 0 50px rgba(0, 240, 255, 0.25), inset 0 0 30px rgba(0, 240, 255, 0.08);
  border-radius: 20px;
  padding: 24px 28px;
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.menu-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  flex-wrap: wrap;
  text-align: left;
}

.menu-logo-emblem {
  width: 220px;
  height: 86px;
  object-fit: contain;
  filter: drop-shadow(0 0 14px rgba(0, 240, 255, 0.55));
}

.cyber-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.6px;
  color: var(--cyan);
  background: rgba(0, 240, 255, 0.12);
  border: 1px solid rgba(0, 240, 255, 0.35);
  padding: 3px 10px;
  border-radius: 99px;
  margin-bottom: 4px;
}

.title-block h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 900;
  letter-spacing: 3px;
  color: #ffffff;
  text-shadow: 0 0 18px rgba(0, 240, 255, 0.75);
  line-height: 1.05;
}

.title-block h2 {
  font-size: clamp(15px, 2vw, 20px);
  font-weight: 800;
  letter-spacing: 5px;
  color: var(--magenta);
  text-shadow: 0 0 12px rgba(255, 42, 133, 0.7);
}

.records-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.record-item {
  background: rgba(14, 26, 48, 0.8);
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: 12px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.record-item img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.record-item small {
  display: block;
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--text-dim);
}

.record-item strong {
  font-size: 20px;
  color: var(--amber);
  font-weight: 900;
}

.difficulty-section h3 {
  font-size: 12px;
  letter-spacing: 1.8px;
  color: var(--text-dim);
  text-align: center;
  margin-bottom: 8px;
}

.difficulty-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.diff-card {
  background: rgba(12, 22, 42, 0.85);
  border: 1px solid rgba(0, 240, 255, 0.26);
  border-radius: 14px;
  padding: 12px;
  cursor: pointer;
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
  transition: all 0.18s ease;
}

.diff-card img {
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.diff-card strong {
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--cyan);
}

.diff-card span {
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.35;
}

.diff-card.active {
  border-color: var(--cyan);
  background: linear-gradient(180deg, rgba(0, 240, 255, 0.2), rgba(14, 28, 54, 0.92));
  box-shadow: 0 0 22px rgba(0, 240, 255, 0.35);
  transform: translateY(-2px);
}

.showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 12px;
}

.showcase-card {
  background: rgba(10, 19, 36, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 10px 14px;
}

.showcase-card h4 {
  font-size: 11px;
  letter-spacing: 1.4px;
  color: var(--cyan);
  margin-bottom: 8px;
  text-align: center;
}

.sprite-strip {
  display: flex;
  justify-content: space-around;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.sprite-pill {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.sprite-pill img {
  width: 46px;
  height: 46px;
  object-fit: contain;
  filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.3));
}

.sprite-pill span {
  font-size: 10px;
  color: var(--text-dim);
  font-weight: 600;
}

.menu-cta-row {
  display: flex;
  justify-content: center;
}

.primary-cyber-btn, .secondary-cyber-btn, .danger-cyber-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 12px 28px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 900;
  letter-spacing: 1.5px;
  cursor: pointer;
  transition: all 0.18s ease;
  color: #ffffff;
}

.primary-cyber-btn {
  background: linear-gradient(135deg, #00b4d8, #0077b6, #7209b7);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 26px rgba(0, 240, 255, 0.5);
}

.primary-cyber-btn:hover {
  transform: scale(1.03);
  box-shadow: 0 0 36px rgba(0, 240, 255, 0.8);
}

.secondary-cyber-btn {
  background: rgba(16, 32, 58, 0.9);
  border: 1px solid var(--cyan);
}

.danger-cyber-btn {
  background: rgba(68, 12, 28, 0.9);
  border: 1px solid var(--crimson);
}

.primary-cyber-btn img, .secondary-cyber-btn img, .danger-cyber-btn img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.controls-footer {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 11px;
  color: var(--text-dim);
  border-top: 1px solid rgba(0, 240, 255, 0.16);
  padding-top: 10px;
}

.controls-footer strong {
  color: var(--cyan);
}

/* ==================== MODALS (SHOP, PAUSE, GAME OVER) ==================== */
.modal-backdrop {
  background: rgba(4, 8, 18, 0.82);
  backdrop-filter: blur(8px);
}

.cyber-modal {
  background: rgba(10, 18, 36, 0.95);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 45px rgba(0, 240, 255, 0.35);
  border-radius: 18px;
  padding: 24px;
  color: var(--text-main);
}

.shop-box {
  width: min(920px, 95vw);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid rgba(0, 240, 255, 0.25);
  padding-bottom: 12px;
}

.modal-title-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.modal-header-icon {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.modal-title-group h2 {
  font-size: 20px;
  letter-spacing: 1.5px;
  color: var(--cyan);
}

.modal-title-group p {
  font-size: 12px;
  color: var(--text-dim);
}

.shop-balance {
  background: rgba(255, 170, 0, 0.14);
  border: 1px solid var(--amber);
  border-radius: 12px;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.shop-balance img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.shop-balance span {
  font-size: 22px;
  font-weight: 900;
  color: var(--amber);
}

.shop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
  gap: 12px;
  max-height: 56vh;
  overflow-y: auto;
  padding-right: 4px;
}

.shop-card {
  background: rgba(15, 28, 52, 0.9);
  border: 1px solid rgba(0, 240, 255, 0.28);
  border-radius: 14px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
}

.shop-card-top {
  display: flex;
  align-items: center;
  gap: 12px;
}

.shop-card-top img {
  width: 54px;
  height: 54px;
  object-fit: contain;
}

.shop-card-info h4 {
  font-size: 14px;
  color: #ffffff;
}

.shop-card-info small {
  color: var(--cyan);
  font-weight: 700;
  font-size: 11px;
}

.shop-card-desc {
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.35;
}

.shop-buy-btn {
  width: 100%;
  background: linear-gradient(90deg, rgba(0, 240, 255, 0.22), rgba(0, 255, 170, 0.22));
  border: 1px solid var(--emerald);
  border-radius: 8px;
  padding: 8px 12px;
  color: #fff;
  font-weight: 800;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.shop-buy-btn img {
  width: 20px;
  height: 20px;
  object-fit: contain;
}

.shop-buy-btn:hover:not(:disabled) {
  background: rgba(0, 255, 170, 0.38);
  box-shadow: 0 0 14px rgba(0, 255, 170, 0.45);
}

.shop-buy-btn:disabled {
  opacity: 0.42;
  cursor: not-allowed;
  border-color: rgba(255, 255, 255, 0.2);
}

.modal-footer {
  display: flex;
  justify-content: center;
}

.pause-box, .gameover-box {
  width: min(480px, 92vw);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.modal-big-icon {
  width: 82px;
  height: 82px;
  object-fit: contain;
}

.modal-btn-stack {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 6px;
}

.summary-stats-grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 6px 0;
}

.sum-card {
  background: rgba(16, 30, 56, 0.85);
  border: 1px solid rgba(0, 240, 255, 0.28);
  border-radius: 12px;
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.sum-card img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.sum-card small {
  font-size: 9px;
  color: var(--text-dim);
}

.sum-card strong {
  font-size: 18px;
  color: var(--amber);
}

/* ==================== TOUCH TWIN-STICK CONTROLS ==================== */
.touch-controls {
  display: none;
  position: absolute;
  inset: 0;
  pointer-events: none;
}

@media (hover: none) and (pointer: coarse), (max-width: 860px) {
  #custom-crosshair {
    display: none;
  }
  #game-canvas {
    cursor: default;
  }
  .touch-controls {
    display: block;
  }
  .joystick-zone {
    position: absolute;
    bottom: 92px;
    width: 136px;
    height: 136px;
    pointer-events: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
  .left-zone { left: 18px; }
  .right-zone { right: 18px; }
  .joy-base {
    width: 112px;
    height: 112px;
    border-radius: 50%;
    background: rgba(0, 240, 255, 0.12);
    border: 2px solid rgba(0, 240, 255, 0.45);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .joy-knob {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: radial-gradient(circle, #00f0ff, #006699);
    border: 2px solid #ffffff;
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.8);
    transform: translate(0px, 0px);
  }
  .joy-caption {
    margin-top: 4px;
    font-size: 9px;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--cyan);
  }
  .records-strip, .difficulty-grid, .showcase-grid {
    grid-template-columns: 1fr;
  }
}