/* ============================================
   AEGIS DEFENSE — LUXURY MILITARY UI
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Share+Tech+Mono&family=Exo+2:wght@300;400;600&display=swap');

:root {
  --gold: #d4af37;
  --gold-light: #f0d060;
  --gold-dark: #9a7d20;
  --bg-deep: #030810;
  --bg-dark: #050e1a;
  --bg-mid: #081525;
  --bg-panel: #0a1c30;
  --border: rgba(212,175,55,0.3);
  --border-bright: rgba(212,175,55,0.7);
  --text: #c8d8e8;
  --text-dim: #5a7080;
  --red: #e53935;
  --green: #43a047;
  --blue: #1e88e5;
  --purple: #8e24aa;
  --cyan: #00bcd4;
  --t0: #1565c0;
  --t1: #2e7d32;
  --t2: #e65100;
  --t3: #6a1b9a;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  font-family: 'Exo 2', sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  touch-action: manipulation;
}

/* ============ SCREENS ============ */
.screen {
  position: fixed; inset: 0;
  display: none;
  flex-direction: column;
  background: var(--bg-deep);
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 10;
}
.screen.active { display: flex; }
.overlay-screen {
  background: rgba(3,8,16,0.92);
  justify-content: center;
  align-items: center;
  backdrop-filter: blur(8px);
  z-index: 50;
}

/* ============ SPLASH SCREEN ============ */
#splashScreen {
  justify-content: center;
  align-items: center;
  text-align: center;
}

.splash-bg {
  position: fixed; inset: 0;
  overflow: hidden;
  z-index: 0;
}

.hex-grid {
  position: absolute; inset: 0;
  background-image: 
    radial-gradient(ellipse at 50% 0%, rgba(212,175,55,0.08) 0%, transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='52'%3E%3Cpolygon points='30,2 58,17 58,47 30,62 2,47 2,17' fill='none' stroke='rgba(212,175,55,0.07)' stroke-width='1'/%3E%3C/svg%3E");
  background-size: auto, 60px 52px;
  animation: driftGrid 30s linear infinite;
}

@keyframes driftGrid {
  0% { background-position: 0 0, 0 0; }
  100% { background-position: 0 -200px, 0 -104px; }
}

.scan-line {
  position: absolute; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, rgba(212,175,55,0.4), transparent);
  animation: scanDown 6s linear infinite;
  box-shadow: 0 0 20px rgba(212,175,55,0.3);
}
@keyframes scanDown {
  0% { top: -2px; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

.splash-content {
  position: relative; z-index: 1;
  display: flex; flex-direction: column;
  align-items: center; gap: 32px;
  padding: 40px 20px;
  max-width: 480px; width: 100%;
}

.game-logo { display: flex; flex-direction: column; align-items: center; gap: 12px; }

.logo-icon {
  width: 90px; height: 90px;
  animation: rotateHex 20s linear infinite;
  filter: drop-shadow(0 0 20px rgba(212,175,55,0.5));
}
.logo-icon svg { width: 100%; height: 100%; }
@keyframes rotateHex {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.game-title {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(2.2rem, 8vw, 3.5rem);
  font-weight: 900;
  color: var(--gold);
  letter-spacing: 0.15em;
  line-height: 1;
  text-shadow: 0 0 30px rgba(212,175,55,0.5), 0 0 60px rgba(212,175,55,0.2);
}
.game-title span {
  display: block;
  font-size: 0.55em;
  letter-spacing: 0.5em;
  color: var(--text);
  font-weight: 400;
  text-shadow: none;
}

.game-subtitle {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.splash-buttons {
  display: flex; flex-direction: column;
  gap: 12px; width: 100%; max-width: 280px;
}

.version-tag {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  color: var(--text-dim);
  border: 1px solid rgba(212,175,55,0.15);
  padding: 4px 16px;
  border-radius: 2px;
}

/* ============ BUTTONS ============ */
.btn-primary, .btn-secondary {
  display: flex; align-items: center; justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border: none; cursor: pointer;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.8rem; font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border-radius: 3px;
  transition: all 0.2s ease;
  width: 100%;
  position: relative; overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.1) 50%, transparent 100%);
  transform: translateX(-100%);
  transition: transform 0.4s ease;
}
.btn-primary:hover::before { transform: translateX(100%); }

.btn-primary {
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  color: var(--bg-deep);
  box-shadow: 0 4px 20px rgba(212,175,55,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(212,175,55,0.5);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: transparent;
  color: var(--gold);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  border-color: var(--border-bright);
  background: rgba(212,175,55,0.05);
  transform: translateY(-1px);
}

.glow-gold { box-shadow: 0 0 20px rgba(212,175,55,0.4), 0 4px 20px rgba(212,175,55,0.2); }
.glow-red { box-shadow: 0 0 20px rgba(229,57,53,0.4), 0 4px 20px rgba(229,57,53,0.2); }

.btn-icon { font-size: 1rem; }
.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }

/* ============ IN-GAME TUTORIAL ============ */
.tutorial-overlay {
  position: absolute; inset: 0;
  background: rgba(3,8,16,0.7);
  backdrop-filter: blur(5px);
  display: flex; justify-content: center; align-items: center;
  z-index: 150;
}
.tutorial-overlay.hidden { display: none; }
.tutorial-card {
  background: rgba(10,28,48,0.95);
  border: 1px solid var(--gold);
  border-radius: 8px;
  padding: 24px; width: 320px;
  box-shadow: 0 0 40px rgba(212,175,55,0.25), 0 10px 30px rgba(0,0,0,0.8);
  display: flex; flex-direction: column; gap: 16px;
  text-align: center;
}
.tutorial-card h3 {
  font-family: 'Orbitron', monospace;
  font-size: 1rem; color: var(--gold); letter-spacing: 0.1em;
  border-bottom: 1px solid rgba(212,175,55,0.3); padding-bottom: 10px;
}
.tut-step { display: none; flex-direction: column; align-items: center; gap: 12px; min-height: 120px; justify-content: center; animation: fadeIn 0.3s ease; }
.tut-step.active { display: flex; }
.tut-icon { font-size: 3rem; filter: drop-shadow(0 0 10px rgba(255,255,255,0.3)); animation: floatTut 2s infinite ease-in-out; }
.tut-step p { font-size: 0.85rem; color: var(--text); line-height: 1.5; }
.tut-step b { color: var(--gold-light); font-size: 0.95rem; }
.tut-nav { display: flex; gap: 10px; margin-top: 10px; }
.tut-nav button { flex: 1; padding: 10px; font-size: 0.75rem; }

@keyframes fadeIn { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }
@keyframes floatTut { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }

/* ============ GUIDE SCREEN ============ */
#guideScreen, #creditsScreen {
  background: var(--bg-dark);
}

.screen-header {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
  position: sticky; top: 0; z-index: 5;
}
.screen-header h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1rem; letter-spacing: 0.2em;
  color: var(--gold);
}
.back-btn {
  background: transparent; border: 1px solid var(--border);
  color: var(--text); padding: 8px 14px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.75rem; cursor: pointer; border-radius: 2px;
  letter-spacing: 0.1em; transition: all 0.2s;
}
.back-btn:hover { border-color: var(--gold); color: var(--gold); }

.guide-content {
  padding: 20px;
  display: flex; flex-direction: column; gap: 20px;
  max-width: 600px; width: 100%; margin: 0 auto;
}

.guide-section {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
}
.guide-section h3 {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.8rem; letter-spacing: 0.15em;
  color: var(--gold); margin-bottom: 12px;
}
.guide-section p, .guide-section ul {
  font-size: 0.85rem; line-height: 1.7;
  color: var(--text); opacity: 0.85;
}
.guide-section ul { padding-left: 16px; }
.guide-section ul li { margin-bottom: 4px; }
.guide-section b { color: var(--gold-light); }

.tower-guide-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.tower-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid;
  border-radius: 4px; padding: 10px;
  display: flex; gap: 10px; align-items: flex-start;
}
.tg-icon {
  width: 36px; height: 36px;
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; flex-shrink: 0;
}
.tg-info { font-size: 0.72rem; line-height: 1.5; }
.tg-info b { font-size: 0.78rem; display: block; margin-bottom: 2px; }

.enemy-guide-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.eg-item {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.8rem; padding: 6px;
  background: rgba(255,255,255,0.03);
  border-radius: 3px;
}

/* ============ GAME SCREEN ============ */
#gameScreen { display: flex; background: var(--bg-deep); overflow: hidden; }

/* HUD Top */
.hud-top {
  display: flex; align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  min-height: 48px; flex-shrink: 0;
}
.hud-stat {
  display: flex; align-items: center; gap: 6px;
  font-family: 'Orbitron', sans-serif;
  font-size: 1.1rem; font-weight: 700;
  color: var(--gold);
}
.hud-icon { font-size: 1.1rem; }
.hud-center {
  display: flex; flex-direction: column;
  align-items: center; gap: 2px;
}
.level-badge {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.9rem; font-weight: 700;
  color: var(--gold); letter-spacing: 0.15em;
}
.wave-badge {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.65rem; color: var(--text-dim);
  letter-spacing: 0.1em;
}

/* Score Bar */
.score-bar {
  display: flex; justify-content: space-between;
  align-items: center;
  padding: 4px 16px;
  background: rgba(5,14,26,0.8);
  border-bottom: 1px solid rgba(212,175,55,0.1);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.68rem; color: var(--text-dim);
  letter-spacing: 0.08em; flex-shrink: 0;
}
#bossAlert {
  color: var(--red); animation: pulse 1s ease-in-out infinite;
  font-weight: bold; letter-spacing: 0.15em;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.3} }

/* Canvas */
.canvas-wrap {
  flex: 1; position: relative;
  overflow: hidden; background: #04101d; /* Slightly brighter blue-black */
  border-top: 1px solid rgba(212,175,55,0.1);
  border-bottom: 1px solid rgba(212,175,55,0.1);
}
#gameCanvas {
  display: block; width: 100%; height: 100%;
  cursor: crosshair;
}

/* Tower Popup Menu */
.tower-menu {
  position: absolute;
  background: var(--bg-panel);
  border: 1px solid var(--border-bright);
  border-radius: 6px;
  padding: 12px;
  width: 180px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.8), 0 0 20px rgba(212,175,55,0.2);
  z-index: 100;
  display: flex; flex-direction: column; gap: 8px;
  transition: all 0.15s ease;
}
.tower-menu.hidden { display: none; }
.tm-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.7rem; letter-spacing: 0.15em;
  color: var(--gold); text-align: center;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.tm-btn {
  padding: 8px 12px; border: 1px solid;
  border-radius: 3px; cursor: pointer;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.72rem; letter-spacing: 0.08em;
  transition: all 0.15s; width: 100%;
  text-align: left;
}
.upgrade-btn { border-color: var(--gold); color: var(--gold); background: rgba(212,175,55,0.05); }
.upgrade-btn:hover { background: rgba(212,175,55,0.15); }
.sell-btn { border-color: var(--green); color: var(--green); background: rgba(67,160,71,0.05); }
.sell-btn:hover { background: rgba(67,160,71,0.15); }
.close-btn { border-color: var(--text-dim); color: var(--text-dim); background: transparent; }
.close-btn:hover { border-color: var(--red); color: var(--red); }

/* Tower Panel */
.tower-panel {
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  padding: 8px 10px 6px;
  flex-shrink: 0;
}
.panel-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.6rem; letter-spacing: 0.2em;
  color: var(--text-dim); text-align: center;
  margin-bottom: 6px;
}
.tower-btns {
  display: flex; gap: 8px; justify-content: center;
  flex-wrap: wrap;
}
.tower-select-btn {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 5px; padding: 8px 10px;
  cursor: pointer; transition: all 0.2s;
  display: flex; flex-direction: column;
  align-items: center; gap: 3px;
  min-width: 62px;
}
.tower-select-btn:hover {
  border-color: var(--gold);
  background: rgba(212,175,55,0.08);
  transform: translateY(-2px);
}
.tower-select-btn.selected {
  border-color: var(--gold);
  background: rgba(212,175,55,0.15);
  box-shadow: 0 0 12px rgba(212,175,55,0.3);
}
.tower-select-btn.disabled-btn { opacity: 0.35; pointer-events: none; }
.tb-icon { font-size: 1.4rem; }
.tb-name {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.5rem; letter-spacing: 0.12em;
  color: var(--text);
}
.tb-cost {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.65rem; color: var(--gold);
}

/* Control Panel */
.control-panel {
  display: flex; gap: 6px;
  padding: 6px 10px 10px;
  background: var(--bg-panel);
  flex-shrink: 0; justify-content: center;
  flex-wrap: wrap;
}
.ctrl-btn {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 16px; border-radius: 4px;
  cursor: pointer; font-family: 'Orbitron', sans-serif;
  font-size: 0.65rem; letter-spacing: 0.1em;
  transition: all 0.2s; white-space: nowrap;
}
.ctrl-btn:hover { border-color: var(--gold); color: var(--gold); }
.ctrl-btn:active { transform: scale(0.95); }
#startWaveBtn {
  background: linear-gradient(135deg, rgba(67,160,71,0.2), rgba(67,160,71,0.05));
  border-color: var(--green); color: var(--green);
  flex: 1; max-width: 140px;
}
#startWaveBtn:hover { background: rgba(67,160,71,0.25); }
#startWaveBtn:disabled {
  opacity: 0.5; cursor: not-allowed;
  background: transparent;
}
.speed-btn.active { border-color: var(--cyan); color: var(--cyan); }
.nuke-btn {
  background: linear-gradient(135deg, rgba(229,57,53,0.15), rgba(229,57,53,0.05));
  border-color: rgba(229,57,53,0.5); color: var(--red);
}
.nuke-btn:hover { background: rgba(229,57,53,0.25); }
.nuke-btn:disabled { opacity: 0.3; cursor: not-allowed; }

/* ============ RESULT SCREENS ============ */
.result-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 32px 28px;
  text-align: center;
  max-width: 380px; width: 90%;
  position: relative; overflow: hidden;
  display: flex; flex-direction: column;
  align-items: center; gap: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.8);
}
.gold-card {
  border-color: var(--gold);
  box-shadow: 0 0 40px rgba(212,175,55,0.2), 0 20px 60px rgba(0,0,0,0.8);
}
.red-card { border-color: var(--red); box-shadow: 0 0 40px rgba(229,57,53,0.2), 0 20px 60px rgba(0,0,0,0.8); }
.victory-card {
  border-color: var(--gold);
  background: linear-gradient(135deg, var(--bg-panel), #0a1500);
  box-shadow: 0 0 60px rgba(212,175,55,0.3), 0 20px 60px rgba(0,0,0,0.8);
}
.result-card h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.4rem; letter-spacing: 0.2em;
  color: var(--gold);
}
.result-card p { font-size: 0.85rem; color: var(--text); opacity: 0.8; }
.result-badge {
  width: 64px; height: 64px; border-radius: 50%;
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem; color: var(--bg-deep);
  box-shadow: 0 0 20px rgba(212,175,55,0.4);
  font-weight: 900;
}
.result-badge.fail {
  background: linear-gradient(135deg, #b71c1c, var(--red));
  box-shadow: 0 0 20px rgba(229,57,53,0.4);
}
.result-badge.victory {
  background: linear-gradient(135deg, var(--gold-dark), var(--gold-light));
  box-shadow: 0 0 30px rgba(212,175,55,0.6);
  animation: goldPulse 2s ease-in-out infinite;
}
@keyframes goldPulse {
  0%,100% { box-shadow: 0 0 20px rgba(212,175,55,0.5); }
  50% { box-shadow: 0 0 50px rgba(212,175,55,0.9); }
}

.result-stats {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.78rem; color: var(--text);
  line-height: 2; letter-spacing: 0.05em;
}
.result-stats span { color: var(--gold); font-weight: bold; }

.star-row { display: flex; gap: 10px; font-size: 2rem; }

.fail-msg { font-size: 0.8rem; color: rgba(229,57,53,0.8); }

/* Fireworks */
.fireworks {
  position: absolute; inset: 0; pointer-events: none;
}
.fw-particle {
  position: absolute; width: 4px; height: 4px;
  border-radius: 50%; animation: fwBurst 1s ease-out forwards;
}
@keyframes fwBurst {
  0% { opacity: 1; transform: translate(0,0); }
  100% { opacity: 0; }
}

/* ============ PAUSE OVERLAY ============ */
.pause-overlay {
  position: fixed; inset: 0;
  background: rgba(3,8,16,0.85);
  backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
}
.pause-overlay.hidden { display: none; }
.pause-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-bright);
  border-radius: 10px; padding: 32px 28px;
  text-align: center; width: 280px;
  display: flex; flex-direction: column; gap: 8px;
  box-shadow: 0 0 40px rgba(212,175,55,0.2);
}
.pause-card h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.2rem; letter-spacing: 0.2em;
  color: var(--gold); margin-bottom: 16px;
}

/* ============ CREDITS ============ */
.credits-content {
  display: flex; flex-direction: column;
  align-items: center; gap: 14px;
  padding: 40px 20px; text-align: center;
}
.credit-logo {
  font-size: 3rem; color: var(--gold);
  filter: drop-shadow(0 0 20px rgba(212,175,55,0.5));
  animation: rotateHex 20s linear infinite;
}
.credits-content h3 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.3rem; color: var(--gold);
  letter-spacing: 0.2em;
}
.credits-content p {
  font-size: 0.85rem; color: var(--text);
  opacity: 0.7; letter-spacing: 0.05em;
}
.credit-divider {
  width: 60px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: 4px 0;
}
.credit-version { font-family: 'Share Tech Mono', monospace; font-size: 0.75rem; }
.credit-year { font-size: 0.7rem; color: var(--text-dim); }

/* ============ SCROLLBAR ============ */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--gold-dark); border-radius: 2px; }

/* ============ RESPONSIVE ============ */
@media (max-width: 480px) {
  .tower-guide-grid { grid-template-columns: 1fr; }
  .guide-content { padding: 14px; gap: 14px; }
  .tower-select-btn { min-width: 54px; padding: 6px 8px; }
  .ctrl-btn { padding: 7px 10px; font-size: 0.6rem; }
  .hud-stat { font-size: 0.9rem; }
}

@media (max-height: 600px) {
  .splash-content { gap: 16px; padding: 20px; }
  .logo-icon { width: 60px; height: 60px; }
  .game-title { font-size: 2rem; }
  .hud-top { min-height: 40px; }
  .score-bar { padding: 3px 10px; }
}

/* Damage numbers */
.damage-num {
  position: absolute;
  font-family: 'Orbitron', sans-serif;
  font-weight: 700; pointer-events: none;
  animation: floatUp 0.8s ease-out forwards;
  text-shadow: 0 0 6px currentColor;
  z-index: 90;
}
@keyframes floatUp {
  0% { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(-40px) scale(0.7); }
}