/* ====================================================
   VENOM SNAKE IO — Dark Neon Theme
   ==================================================== */

/* ---------- CSS Variables ---------- */
:root {
  --bg-primary: #060611;
  --bg-secondary: #0c0b1e;
  --bg-card: rgba(12, 11, 30, 0.82);
  --bg-glass: rgba(16, 15, 40, 0.75);
  --accent: #39ff14;
  --accent-dim: #1aad0a;
  --accent-purple: #bf00ff;
  --accent-cyan: #00e5ff;
  --text: #e4e4e4;
  --text-dim: #7a7a9a;
  --border: rgba(57, 255, 20, 0.18);
  --danger: #ff1744;
  --warning: #ffab00;
  --success: #00e676;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-glow: 0 0 30px rgba(57, 255, 20, 0.12);
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  height: 100%;
  overflow: hidden;
  touch-action: none; /* Disable double-tap zoom, swipe navigation */
  overscroll-behavior: none; /* Disable pull-to-refresh & page bounce */
  -webkit-overflow-scrolling: auto;
}
body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  position: fixed; /* Lock viewport on mobile */
  inset: 0;
}

/* ---------- Screens ---------- */
.screen {
  position: fixed; inset: 0;
  display: none;
  align-items: center; justify-content: center;
  z-index: 100;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(57,255,20,0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(191,0,255,0.06) 0%, transparent 50%),
    var(--bg-primary);
  animation: screenFadeIn .4s ease-out;
}
.screen.active { display: flex; }

@keyframes screenFadeIn {
  from { opacity: 0; transform: scale(.97); }
  to   { opacity: 1; transform: scale(1); }
}

.screen-content {
  width: 92%; max-width: 520px;
  max-height: 94vh;
  overflow-y: auto;
  display: flex; flex-direction: column; align-items: center; gap: 18px;
  padding: 28px 0;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-dim) transparent;
}

/* ---------- Glass Card ---------- */
.glass-card {
  width: 100%;
  background: var(--bg-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-glow);
}

/* ========== MENU SCREEN ========== */
.logo-area { text-align: center; }
.logo-snake {
  font-size: 54px;
  animation: snakeBounce 2s ease-in-out infinite;
  filter: drop-shadow(0 0 20px rgba(57,255,20,.4));
}
@keyframes snakeBounce {
  0%,100% { transform: translateY(0) rotate(0); }
  50%     { transform: translateY(-10px) rotate(5deg); }
}

.game-title {
  font-family: var(--font-display);
  line-height: 1.1;
  margin-top: 6px;
}
.title-venom {
  display: block;
  font-size: clamp(40px, 8vw, 60px);
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent), #a0ff80, var(--accent));
  background-size: 200% 200%;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shineTitle 3s ease-in-out infinite;
  filter: drop-shadow(0 0 18px rgba(57,255,20,.45));
}
.title-snake {
  display: block;
  font-size: clamp(22px, 4.5vw, 34px);
  font-weight: 700;
  color: var(--text);
  letter-spacing: 6px;
}
@keyframes shineTitle {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.subtitle {
  font-size: 13px; color: var(--text-dim); margin-top: 4px;
  letter-spacing: 1px;
}

/* ---------- Inputs ---------- */
.input-group { width: 100%; margin-bottom: 4px; }
.input-group label {
  display: block; font-size: 12px; font-weight: 600;
  color: var(--accent); text-transform: uppercase;
  letter-spacing: 1px; margin-bottom: 6px;
}
input[type="text"] {
  width: 100%; padding: 12px 16px;
  background: rgba(0,0,0,.35);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text); font-size: 15px;
  font-family: var(--font-body);
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
input[type="text"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(57,255,20,.12);
}
input[type="text"]::placeholder { color: var(--text-dim); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px;
  border: none; border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 14px; font-weight: 700;
  cursor: pointer; transition: all .2s;
  text-transform: uppercase; letter-spacing: .5px;
  position: relative; overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(rgba(255,255,255,.1), transparent);
  opacity: 0; transition: opacity .2s;
}
.btn:hover::after { opacity: 1; }
.btn:active { transform: scale(.96); }
.btn-lg { padding: 15px 32px; font-size: 16px; }

.btn-primary {
  background: linear-gradient(135deg, var(--accent-dim), var(--accent));
  color: #0a0a0a;
  box-shadow: 0 4px 20px rgba(57,255,20,.25);
}
.btn-primary:hover { box-shadow: 0 6px 30px rgba(57,255,20,.4); transform: translateY(-1px); }

.btn-secondary {
  background: rgba(57,255,20,.1);
  color: var(--accent);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: rgba(57,255,20,.2); }

.btn-danger {
  background: rgba(255,23,68,.12);
  color: var(--danger);
  border: 1px solid rgba(255,23,68,.25);
}
.btn-danger:hover { background: rgba(255,23,68,.22); }

.btn-icon { font-size: 18px; }

/* ---------- Divider ---------- */
.divider {
  display: flex; align-items: center; gap: 12px;
  width: 100%; margin: 4px 0; color: var(--text-dim); font-size: 12px;
}
.divider::before, .divider::after {
  content: ''; flex: 1; height: 1px;
  background: var(--border);
}

/* ---------- Join Row ---------- */
.join-row { display: flex; gap: 10px; width: 100%; }
.join-row input { flex: 1; text-align: center; font-size: 18px; font-weight: 700; letter-spacing: 4px; font-family: var(--font-display); }
.join-row .btn { white-space: nowrap; }

/* ---------- Footer ---------- */
.footer-text { font-size: 12px; color: var(--text-dim); }
kbd {
  display: inline-block; padding: 2px 7px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15);
  border-radius: 4px; font-family: var(--font-body); font-size: 11px;
  color: var(--accent);
}

/* ---------- Particles ---------- */
.particles { position: fixed; inset: 0; pointer-events: none; z-index: -1; }
.particle {
  position: absolute;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--accent);
  opacity: .25;
  animation: floatParticle 8s linear infinite;
}
.particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; animation-duration: 12s; }
.particle:nth-child(2) { left: 30%; top: 70%; animation-delay: 1s; animation-duration: 10s; }
.particle:nth-child(3) { left: 55%; top: 15%; animation-delay: 2s; animation-duration: 14s; }
.particle:nth-child(4) { left: 75%; top: 55%; animation-delay: 3s; animation-duration: 9s; }
.particle:nth-child(5) { left: 85%; top: 30%; animation-delay: 4s; animation-duration: 11s; }
.particle:nth-child(6) { left: 20%; top: 85%; animation-delay: 1.5s; animation-duration: 13s; }
.particle:nth-child(7) { left: 60%; top: 80%; animation-delay: 2.5s; animation-duration: 10s; }
.particle:nth-child(8) { left: 45%; top: 45%; animation-delay: 3.5s; animation-duration: 15s; }

@keyframes floatParticle {
  0%   { transform: translateY(0) scale(1);   opacity: 0; }
  10%  { opacity: .3; }
  90%  { opacity: .3; }
  100% { transform: translateY(-100vh) scale(.5); opacity: 0; }
}

/* ========== LOBBY SCREEN ========== */
.lobby-title {
  font-family: var(--font-display); font-size: 26px;
  color: var(--accent);
  text-shadow: 0 0 20px rgba(57,255,20,.3);
}

.room-code-box {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  padding: 16px;
}
.room-code-label { font-size: 13px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; }
.room-code-value {
  font-family: var(--font-display); font-size: 32px; font-weight: 900;
  color: var(--accent); letter-spacing: 6px;
  text-shadow: 0 0 15px rgba(57,255,20,.5);
}
.btn-icon-small {
  background: none; border: 1px solid var(--border);
  border-radius: 6px; padding: 6px 10px;
  cursor: pointer; font-size: 16px;
  transition: all .2s;
}
.btn-icon-small:hover { background: rgba(57,255,20,.1); border-color: var(--accent); }

/* ---------- Skin Selection ---------- */
.skin-section h3, .player-list-section h3 {
  font-family: var(--font-display); font-size: 13px;
  color: var(--accent); text-transform: uppercase;
  letter-spacing: 1.5px; margin-bottom: 14px;
}
.skin-options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  max-height: 280px;
  overflow-y: auto;
  padding-right: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-dim) transparent;
}
.skin-option {
  display: flex; flex-direction: column; align-items: center; gap: 5px;
  padding: 8px 4px;
  background: rgba(0,0,0,.25); border: 2px solid transparent;
  border-radius: var(--radius-sm); cursor: pointer;
  transition: all .25s; font-size: 10px; color: var(--text-dim);
  font-family: var(--font-body); font-weight: 600;
  min-width: 0;
}
.skin-option:hover { border-color: rgba(57,255,20,.3); background: rgba(57,255,20,.04); }
.skin-option.selected { border-color: var(--accent); color: var(--accent); background: rgba(57,255,20,.08); }

.skin-preview {
  width: 44px; height: 44px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  position: relative;
}

.snake-preview-body {
  width: 34px; height: 34px; border-radius: 50%;
  position: relative;
}
.snake-preview-body::after {
  content: ''; position: absolute;
  width: 6px; height: 6px; border-radius: 50%;
  background: #fff; top: 8px; right: 6px;
  box-shadow: 0 8px 0 #fff;
}

/* --- Original 3 skins --- */
.green-body  { background: radial-gradient(circle at 35% 35%, #81c784, #388e3c); }
.cobra-body  { background: radial-gradient(circle at 35% 35%, #ff8a65, #d84315); }
.banded-body {
  background: conic-gradient(#FFD600 0deg, #FFD600 60deg, #212121 60deg, #212121 120deg,
    #FFD600 120deg, #FFD600 180deg, #212121 180deg, #212121 240deg,
    #FFD600 240deg, #FFD600 300deg, #212121 300deg, #212121 360deg);
}

/* --- 20 new Vietnamese snake skins --- */
.king_cobra-body { background: radial-gradient(circle at 35% 35%, #8d6e63, #3e2723); }
.capnia-body {
  background: conic-gradient(#eceff1 0deg, #eceff1 60deg, #263238 60deg, #263238 120deg,
    #eceff1 120deg, #eceff1 180deg, #263238 180deg, #263238 240deg,
    #eceff1 240deg, #eceff1 300deg, #263238 300deg, #263238 360deg);
}
.lucduoido-body {
  background: radial-gradient(circle at 70% 70%, #e53935, #2e7d32 55%);
}
.raotrau-body { background: radial-gradient(circle at 35% 35%, #c0ca33, #5d4037); }
.hotrau-body  { background: radial-gradient(circle at 35% 35%, #fdd835, #4e342e); }
.socdua-body  { background: radial-gradient(circle at 35% 35%, #a1887f, #4e342e);
  background-image: repeating-linear-gradient(135deg, transparent, transparent 4px, rgba(255,255,255,.12) 4px, rgba(255,255,255,.12) 6px), radial-gradient(circle at 35% 35%, #a1887f, #4e342e);
}
.roi-body     { background: radial-gradient(circle at 35% 35%, #b2ff59, #33691e); }
.hoaco-body   { background: radial-gradient(circle at 35% 35%, #aed581, #558b2f); }
.nuoc-body    { background: radial-gradient(circle at 35% 35%, #78909c, #263238); }
.maigam-body  {
  background: conic-gradient(#e53935 0deg, #e53935 90deg, #212121 90deg, #212121 180deg,
    #e53935 180deg, #e53935 270deg, #212121 270deg, #212121 360deg);
}
.lai-body       { background: radial-gradient(circle at 35% 35%, #9e9e9e, #424242); }
.bongsung-body  { background: radial-gradient(circle at 35% 35%, #b0bec5, #607d8b); }
.hoctro-body    { background: radial-gradient(circle at 35% 35%, #d7ccc8, #6d4c41); }
.rao-body       { background: radial-gradient(circle at 35% 35%, #66bb6a, #1b5e20); }
.hongua-body    { background: radial-gradient(circle at 35% 35%, #795548, #3e2723);
  background-image: repeating-linear-gradient(45deg, transparent, transparent 3px, rgba(255,215,0,.15) 3px, rgba(255,215,0,.15) 5px), radial-gradient(circle at 35% 35%, #795548, #3e2723);
}
.khoang-body {
  background: conic-gradient(#e65100 0deg, #e65100 45deg, #000 45deg, #000 90deg,
    #e65100 90deg, #e65100 135deg, #000 135deg, #000 180deg,
    #e65100 180deg, #e65100 225deg, #000 225deg, #000 270deg,
    #e65100 270deg, #e65100 315deg, #000 315deg, #000 360deg);
}
.lucnui-body     { background: radial-gradient(circle at 35% 35%, #4caf50, #004d40); }
.kimtuyen-body   { background: radial-gradient(circle at 30% 30%, #ffd600, #e65100, #b71c1c); }
.rao_thuong-body { background: radial-gradient(circle at 35% 35%, #d4c099, #8d6e63); }
.trau-body       { background: radial-gradient(circle at 35% 35%, #6d4c41, #1b0f07); }

/* ---------- Player List ---------- */
.badge {
  display: inline-block; padding: 2px 10px;
  background: rgba(57,255,20,.12); color: var(--accent);
  border-radius: 20px; font-size: 12px; font-weight: 700;
  margin-left: 6px;
}
.player-list {
  display: flex; flex-direction: column; gap: 6px;
  max-height: 200px; overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-dim) transparent;
}
.player-card {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px;
  background: rgba(0,0,0,.2); border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,.04);
  animation: slideIn .3s ease-out;
}
@keyframes slideIn { from { opacity: 0; transform: translateX(-10px); } to { opacity: 1; transform: none; } }

.player-card .skin-dot {
  width: 14px; height: 14px; border-radius: 50%; flex-shrink: 0;
}
.player-card .pname { flex: 1; font-weight: 600; font-size: 14px; }
.player-card .host-badge {
  padding: 2px 8px; font-size: 10px; font-weight: 700;
  background: rgba(255,171,0,.15); color: var(--warning);
  border-radius: 4px; text-transform: uppercase;
}
.player-card .ready-badge {
  padding: 2px 8px; font-size: 10px; font-weight: 700;
  border-radius: 4px; text-transform: uppercase;
}
.player-card .ready-badge.yes { background: rgba(0,230,118,.15); color: var(--success); }
.player-card .ready-badge.no  { background: rgba(255,255,255,.05); color: var(--text-dim); }

/* ---------- Lobby Actions ---------- */
.lobby-actions {
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: center;
  width: 100%;
}

/* ========== GAME HUD ========== */
#game-hud {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 50; pointer-events: none;
}
.hud-top-left {
  position: absolute; top: 16px; left: 16px;
  display: flex; flex-direction: column; gap: 6px;
}
.hud-item {
  padding: 8px 14px;
  background: rgba(6,6,17,.75);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 600;
  color: var(--text);
  pointer-events: auto;
}

/* ---------- Kill Feed ---------- */
.kill-feed {
  position: absolute; top: 16px; right: 16px;
  display: flex; flex-direction: column; gap: 4px;
  align-items: flex-end;
}
.kill-msg {
  padding: 6px 12px;
  background: rgba(6,6,17,.8);
  border: 1px solid rgba(255,23,68,.2);
  border-radius: var(--radius-sm);
  font-size: 12px; font-weight: 600;
  color: var(--text);
  animation: killMsgIn .3s ease-out, killMsgOut .5s 3s ease-in forwards;
  white-space: nowrap;
}
@keyframes killMsgIn { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: none; } }
@keyframes killMsgOut { to { opacity: 0; transform: translateX(20px); } }

/* ========== GAME OVER SCREEN ========== */
.gameover-icon { font-size: 64px; animation: pulseIcon 1.5s ease-in-out infinite; }
@keyframes pulseIcon { 0%,100% { transform: scale(1); } 50% { transform: scale(1.12); } }

.gameover-title {
  font-family: var(--font-display); font-size: 36px;
  color: var(--accent);
  text-shadow: 0 0 30px rgba(57,255,20,.4);
}
.gameover-message { font-size: 16px; color: var(--text-dim); text-align: center; }

.rankings-card { width: 100%; }
.rankings-card h3 {
  font-family: var(--font-display); font-size: 14px;
  color: var(--accent); text-transform: uppercase;
  letter-spacing: 1.5px; margin-bottom: 12px;
}

#rankings-table {
  width: 100%; border-collapse: collapse;
}
#rankings-table th {
  padding: 8px 10px;
  font-size: 11px; text-transform: uppercase; letter-spacing: 1px;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  text-align: left;
}
#rankings-table td {
  padding: 10px; font-size: 14px;
  border-bottom: 1px solid rgba(255,255,255,.03);
}
#rankings-table tr.winner td {
  color: var(--accent);
  font-weight: 700;
  text-shadow: 0 0 10px rgba(57,255,20,.3);
}
#rankings-table tr.dead td { color: var(--text-dim); }

/* ========== TOAST ========== */
#toast-container {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column-reverse; gap: 8px;
  z-index: 200; pointer-events: none;
}
.toast {
  padding: 10px 22px;
  background: rgba(6,6,17,.88);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 600; color: var(--text);
  white-space: nowrap;
  animation: toastIn .3s ease-out, toastOut .4s 2.6s ease-in forwards;
}
.toast.error { border-color: rgba(255,23,68,.4); color: var(--danger); }
@keyframes toastIn  { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes toastOut { to { opacity: 0; transform: translateY(-10px); } }

/* ========== Game Container ========== */
#game-container {
  position: fixed; inset: 0; z-index: 10;
  background: #060611;
}
#game-container canvas { display: block; }

/* ========== Scrollbar ========== */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--accent-dim); border-radius: 10px; }

/* ========== Mobile Controls Overlay ========== */
.mobile-controls-overlay {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: 220px;
  z-index: 60;
  pointer-events: none; /* Let clicks pass through to game except buttons */
  display: none; /* Shown dynamically in JS */
  justify-content: space-between;
  align-items: center;
  padding: 0 40px 30px 40px;
  touch-action: none;
  overscroll-behavior: none;
}

/* Only show on touch devices or screens under 1024px */
@media (max-width: 1024px), (pointer: coarse) {
  .mobile-controls-overlay {
    display: flex !important;
  }
}

.joystick-zone {
  width: 150px;
  height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
  touch-action: none;
  overscroll-behavior: none;
}

#joystick-base {
  width: 110px;
  height: 110px;
  background: rgba(6, 6, 17, 0.65);
  border: 2px solid var(--border);
  border-radius: 50%;
  position: relative;
  box-shadow: 0 0 20px rgba(57, 255, 20, 0.15);
  touch-action: none;
}

#joystick-knob {
  width: 46px;
  height: 46px;
  background: radial-gradient(circle at 35% 35%, #81c784, #388e3c);
  border: 1.5px solid var(--accent);
  border-radius: 50%;
  position: absolute;
  left: 30px;
  top: 30px;
  box-shadow: 0 0 15px var(--accent);
  transition: transform 0.05s ease-out;
}

.shoot-zone {
  pointer-events: auto;
}

.mobile-shoot-btn {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(255, 23, 68, 0.2);
  border: 3px solid var(--danger);
  color: #fff;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 1px;
  cursor: pointer;
  box-shadow: 0 0 25px rgba(255, 23, 68, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
  outline: none;
  transition: transform 0.1s ease;
}

.mobile-shoot-btn:active {
  transform: scale(0.88);
  background: rgba(255, 23, 68, 0.55);
  box-shadow: 0 0 35px var(--danger);
}

/* ========== Responsive ========== */
@media (max-width: 500px) {
  .skin-options { grid-template-columns: repeat(3, 1fr); gap: 6px; }
  .skin-option { padding: 6px 2px; font-size: 9px; }
  .skin-preview { width: 36px; height: 36px; }
  .snake-preview-body { width: 28px; height: 28px; }
  .room-code-value { font-size: 24px; }
  .game-title .title-venom { font-size: 36px; }
  
  .mobile-controls-overlay {
    padding: 0 20px 20px 20px;
    height: 180px;
  }
  #joystick-base {
    width: 90px;
    height: 90px;
  }
  #joystick-knob {
    width: 38px;
    height: 38px;
    left: 24px;
    top: 24px;
  }
  .mobile-shoot-btn {
    width: 70px;
    height: 70px;
    font-size: 12px;
  }
}