/* ============================================================
   Snowball Fight — UI styled after sb.fun
   Dark navy foundation, Inter font, clean card aesthetics
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* --- Design Tokens --- */
:root {
  /* sb.fun core palette */
  --bg:           #0A1628;
  --bg-card:      #0F1E38;
  --bg-card-2:    #162240;
  --border:       rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.18);

  /* Accent — icy blue-cyan */
  --accent:       #38BDF8;   /* sky-400 */
  --accent-dim:   rgba(56, 189, 248, 0.15);
  --accent-glow:  rgba(56, 189, 248, 0.35);

  /* Text */
  --text:         #FFFFFF;
  --text-muted:   rgba(255,255,255,0.5);
  --text-dim:     rgba(255,255,255,0.3);

  /* Status */
  --green:  #22C55E;
  --yellow: #EAB308;
  --red:    #EF4444;

  --radius-sm: 8px;
  --radius:    12px;
  --radius-lg: 16px;

  --font: 'Inter', system-ui, sans-serif;
  --transition: 0.18s ease;
}

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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--bg);
  font-family: var(--font);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  touch-action: none;
  overscroll-behavior: none;
}

ul { list-style: none; }

/* --- Canvas --- */
#gameCanvas {
  display: block;
  width: 100vw; height: 100vh;
  position: fixed; top: 0; left: 0;
  z-index: 0;
}

/* ============================================================
   Utility
   ============================================================ */
.hidden { display: none !important; }

/* ============================================================
   Buttons — sb.fun style
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.75rem;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
  min-width: 160px;
}

.btn:active { transform: scale(0.97); }

/* Primary — solid accent fill */
.btn-primary {
  background: var(--accent);
  color: #0A1628;
  box-shadow: 0 0 24px var(--accent-glow);
}
.btn-primary:hover {
  background: #67D2FC;
  box-shadow: 0 0 36px var(--accent-glow);
  transform: translateY(-1px);
}

/* Secondary — ghost with accent border */
.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid rgba(56,189,248,0.4);
}
.btn-secondary:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  transform: translateY(-1px);
}

/* ============================================================
   Card mixin — reused for menu, stats, etc.
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

/* ============================================================
   Main Menu
   ============================================================ */
#mainMenu {
  position: fixed; inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 22, 40, 0.92);
  animation: fadeIn 0.4s ease;
}

/* Subtle radial gradient spotlight */
#mainMenu::before {
  content: '';
  position: absolute;
  top: -20%; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(56,189,248,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.menu-container {
  composes: card;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);

  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 2.5rem 2rem;
  max-width: 400px;
  width: 90%;
  position: relative;
  animation: slideUp 0.35s ease;

  /* Top edge glow */
  box-shadow:
    0 0 0 1px var(--border),
    0 0 60px rgba(56,189,248,0.06),
    0 32px 64px rgba(0,0,0,0.5);
}

/* Accent top border line */
.menu-container::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  border-radius: 99px;
}

/* Logo / branding row */
.menu-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.25rem;
}

.menu-logo-icon {
  font-size: 2rem;
  line-height: 1;
}

.game-title {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}

.game-title span {
  color: var(--accent);
}

.game-subtitle {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

/* Live indicator pill (decorative, sb.fun inspired) */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.25);
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--green);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.live-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  animation: pulseDot 1.5s ease infinite;
}

/* Menu button group */
.menu-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  width: 100%;
}

/* How-to panel */
.info-panel {
  width: 100%;
  background: var(--bg-card-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  animation: fadeIn 0.2s ease;
}

.info-panel h3 {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.info-panel li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.3rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.info-panel li:last-child { border-bottom: none; }

.info-panel li strong {
  color: var(--text);
  font-weight: 600;
  font-size: 0.8rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  min-width: 52px;
  text-align: center;
}

/* ============================================================
   HUD
   ============================================================ */
#hud {
  position: fixed; inset: 0;
  z-index: 5;
  pointer-events: none;
}

/* Shared HUD chip */
.hud-chip {
  background: rgba(10, 22, 40, 0.75);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 0.4rem 0.7rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hud-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

/* Health — top left */
#healthBar {
  position: absolute;
  top: 1rem; left: 1rem;
  background: rgba(10, 22, 40, 0.75);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(12px);
  padding: 0.4rem 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.bar-track {
  width: 110px; height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 99px;
  overflow: hidden;
}

.bar-fill {
  height: 100%; width: 100%;
  background: var(--green);
  border-radius: 99px;
  transition: width 0.2s ease, background 0.3s ease;
  box-shadow: 0 0 8px rgba(34,197,94,0.5);
}

.bar-fill.warning {
  background: var(--yellow);
  box-shadow: 0 0 8px rgba(234,179,8,0.5);
}

.bar-fill.danger {
  background: var(--red);
  box-shadow: 0 0 8px rgba(239,68,68,0.5);
}

#healthText {
  font-size: 0.8rem;
  font-weight: 700;
  min-width: 26px;
  text-align: right;
  color: var(--text);
}

/* Wave — top center */
#waveInfo {
  position: absolute;
  top: 1rem; left: 50%;
  transform: translateX(-50%);
  background: rgba(10, 22, 40, 0.75);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(12px);
  padding: 0.4rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

#waveNumber {
  font-size: 1rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.01em;
}

/* Score — bottom right */
#scoreDisplay {
  position: absolute;
  bottom: 1.5rem; right: 1.5rem;
  background: rgba(10, 22, 40, 0.75);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(12px);
  padding: 0.5rem 0.9rem;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

#scoreValue {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

/* Combo — bottom center */
#comboDisplay {
  position: absolute;
  bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  animation: fadeIn 0.15s ease;
}

#comboText {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--accent);
  text-shadow: 0 0 20px var(--accent-glow);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  animation: pulse 0.6s ease infinite alternate;
}

/* Throw cooldown */
#throwCooldown {
  position: absolute;
  bottom: 1.2rem; left: 50%;
  transform: translateX(-50%);
  width: 32px; height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1.5px solid rgba(56,189,248,0.3);
  overflow: hidden;
}

#cooldownFill {
  width: 100%; height: 100%;
  background: var(--accent);
  transform-origin: bottom center;
  transition: transform 0.05s linear;
  opacity: 0.7;
}

/* Crosshair */
#crosshair {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 20px; height: 20px;
  pointer-events: none;
}

.ch-h, .ch-v {
  position: absolute;
  background: rgba(255,255,255,0.9);
  border-radius: 1px;
}

.ch-h {
  width: 100%; height: 1.5px;
  top: 50%; transform: translateY(-50%);
  /* gap in centre */
  box-shadow: 0 0 0 3px rgba(10,22,40,0.01);
}

.ch-v {
  height: 100%; width: 1.5px;
  left: 50%; transform: translateX(-50%);
}

/* Gap in crosshair centre */
.ch-h::after, .ch-v::after {
  content: '';
  position: absolute;
  background: transparent;
  border-radius: 1px;
}

/* ============================================================
   Pointer-lock hint
   ============================================================ */
#lockHint {
  position: absolute;
  bottom: 5rem;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
  animation: fadeIn 0.3s ease;
}

.lock-hint-inner {
  background: rgba(10, 22, 40, 0.75);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(8px);
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  animation: pulse 2s ease infinite alternate;
}

/* ============================================================
   Death Screen
   ============================================================ */
#deathScreen {
  position: fixed; inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 22, 40, 0.9);
  animation: fadeIn 0.5s ease;
}

.death-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  padding: 2.5rem 2rem;
  max-width: 420px;
  width: 90%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  animation: slideUp 0.35s ease;
  position: relative;
  box-shadow: 0 32px 64px rgba(0,0,0,0.6), 0 0 0 1px var(--border);
}

.death-container::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--red), transparent);
}

.death-container h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}

.death-container h2 span {
  color: var(--red);
}

/* Divider */
.death-divider {
  width: 100%;
  height: 1px;
  background: var(--border);
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  width: 100%;
}

.stat-item {
  background: var(--bg-card-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
}

.stat-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.death-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  width: 100%;
}

/* ============================================================
   Animations
   ============================================================ */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  from { opacity: 0.8; transform: scale(1); }
  to   { opacity: 1;   transform: scale(1.04); }
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

/* ============================================================
   Responsive — minimum 1280×720
   ============================================================ */
@media (max-width: 768px) {
  .game-title { font-size: 1.4rem; }
  .btn { font-size: 0.9rem; min-width: 120px; }
  .bar-track { width: 80px; }
  #scoreValue { font-size: 1.2rem; }
}

/* ============================================================
   Screen Overlays
   ============================================================ */

/* Red damage flash */
#damageFlash {
  position: fixed; inset: 0;
  z-index: 50;
  background: rgba(239, 68, 68, 0.35);
  opacity: 0;
  pointer-events: none;
}
#damageFlash.flash-active {
  animation: damageFlash 0.4s ease-out forwards;
}
@keyframes damageFlash {
  0%   { opacity: 1; }
  100% { opacity: 0; }
}

/* Low-health vignette */
#vignetteOverlay {
  position: fixed; inset: 0;
  z-index: 4;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(220,20,20,0.7) 100%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
  animation: vigPulse 1.5s ease-in-out infinite;
}
@keyframes vigPulse {
  0%, 100% { filter: brightness(1); }
  50%       { filter: brightness(1.15); }
}

/* ============================================================
   Main Menu Additions
   ============================================================ */
.best-score {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  opacity: 0.8;
  letter-spacing: 0.04em;
  margin-top: -0.25rem;
}

/* ============================================================
   HUD Additions
   ============================================================ */

/* Wave info — enemies count inline */
.hud-divider {
  color: var(--text-dim);
  font-size: 0.65rem;
}

.enemies-count {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--red);
  min-width: 18px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* Score popup "+N" animation */
#scoreDisplay {
  position: relative;
}
.score-popup {
  position: absolute;
  top: -1.2rem;
  right: 0;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0;
  pointer-events: none;
}
.score-popup.score-pop {
  animation: scoreFloat 0.9s ease-out forwards;
}
@keyframes scoreFloat {
  0%   { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-24px); }
}

/* Active power-ups panel — bottom left */
#activePowers {
  position: absolute;
  bottom: 1.5rem; left: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  pointer-events: none;
  max-width: 180px;
}

.power-item {
  background: rgba(10,22,40,0.8);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(8px);
  padding: 0.3rem 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
}

.power-item.pulse {
  animation: pulse 0.5s ease infinite alternate;
}

.power-label {
  flex: 1;
  color: var(--text);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.power-timer {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: 0.7rem;
  min-width: 24px;
  text-align: right;
}

.power-bar {
  width: 100%;
  height: 2px;
  background: rgba(255,255,255,0.1);
  border-radius: 1px;
  overflow: hidden;
  margin-top: 0.15rem;
  position: absolute;
  bottom: 2px; left: 0; right: 0;
}

.power-fill {
  height: 100%;
  border-radius: 1px;
  transition: width 0.3s linear;
}

/* Power-up pickup notification */
.powerup-notif {
  position: absolute;
  bottom: 5.5rem; left: 50%;
  transform: translateX(-50%);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-shadow: 0 0 12px currentColor;
  pointer-events: none;
  white-space: nowrap;
}
.powerup-notif.fade-out {
  animation: fadeOutUp 2s ease forwards;
}
@keyframes fadeOutUp {
  0%   { opacity: 1; transform: translateX(-50%) translateY(0); }
  60%  { opacity: 1; transform: translateX(-50%) translateY(-8px); }
  100% { opacity: 0; transform: translateX(-50%) translateY(-20px); }
}

/* Wave message overlay */
.wave-msg {
  position: absolute;
  top: 40%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  text-align: center;
  text-transform: uppercase;
  white-space: pre-line;
  pointer-events: none;
  animation: waveMsg 0.3s ease;
  text-shadow: 0 0 30px currentColor, 0 2px 8px rgba(0,0,0,0.8);
  line-height: 1.3;
}

.wave-msg-green  { color: var(--green); }
.wave-msg-accent { color: var(--accent); }
.wave-msg-gold   { color: #ffd700; }

.wave-msg-fade { animation: fadeOut 0.4s ease forwards; }

@keyframes waveMsg {
  from { opacity: 0; transform: translate(-50%, -50%) scale(0.8); }
  to   { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}
@keyframes fadeOut {
  from { opacity: 1; }
  to   { opacity: 0; }
}

/* ============================================================
   Floating Damage Numbers
   ============================================================ */
.floating-damage {
  position: fixed;
  font-family: var(--font);
  font-size: 1.2rem;
  font-weight: 900;
  color: #fff;
  text-shadow: 0 0 8px rgba(0,0,0,0.9), 0 1px 3px rgba(0,0,0,0.9);
  pointer-events: none;
  z-index: 100;
  transform: translate(-50%, -50%);
  animation: floatDmg 0.9s ease-out forwards;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.floating-damage.headshot {
  color: #ffd700;
  font-size: 1.5rem;
  text-shadow: 0 0 16px rgba(255,215,0,0.8), 0 1px 3px rgba(0,0,0,0.9);
}

@keyframes floatDmg {
  0%   { opacity: 1; transform: translate(-50%, -50%); }
  20%  { opacity: 1; transform: translate(-50%, -80%); }
  100% { opacity: 0; transform: translate(-50%, -130%); }
}

/* ============================================================
   Death Screen Additions
   ============================================================ */
.death-message {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
  text-align: center;
  margin-top: -0.5rem;
}

.new-highscore {
  background: linear-gradient(135deg, rgba(255,215,0,0.15), rgba(255,180,0,0.08));
  border: 1px solid rgba(255,215,0,0.4);
  border-radius: var(--radius-sm);
  padding: 0.4rem 1rem;
  color: #ffd700;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: center;
  animation: pulse 1s ease infinite alternate;
}

/* ============================================================
   Mobile Touch Controls
   ============================================================ */

#mobileControls {
  position: fixed; inset: 0;
  z-index: 6;
  pointer-events: all;
  touch-action: none;
}

#joystickBase {
  position: absolute; bottom: 110px; left: 30px;
  width: 110px; height: 110px; border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 2px solid rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  pointer-events: all; touch-action: none; user-select: none;
}

#joystickThumb {
  width: 46px; height: 46px; border-radius: 50%;
  background: rgba(56,189,248,0.65);
  border: 2px solid rgba(56,189,248,0.9);
  pointer-events: none;
  box-shadow: 0 0 12px rgba(56,189,248,0.4);
  will-change: transform;
}

#throwBtn {
  position: absolute; bottom: 110px; right: 30px;
  width: 80px; height: 80px; border-radius: 50%;
  background: rgba(56,189,248,0.18);
  border: 2px solid rgba(56,189,248,0.5);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem;
  pointer-events: all; touch-action: none; user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.1s, transform 0.1s;
}
#throwBtn:active { background: rgba(56,189,248,0.4); transform: scale(0.93); }

/* Responsive HUD repositioning for touch screens */
@media (pointer: coarse) {
  #scoreDisplay { top: 1rem; right: 1rem; bottom: auto; }
  #activePowers { bottom: 9rem; }
  #comboDisplay { bottom: 9rem; }
  #throwCooldown { bottom: 9rem; }
  #lockHint { display: none !important; }
}