/* ============================================================
   SNAKE — style.css
   Thème sombre, inspiré Démineur & Jeu de la Vie de Breizhimic
   ============================================================ */

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

:root {
  /* Background */
  --bg:          #0d0d1a;
  --bg-panel:    #1a1a2e;
  --bg-card:     #16213e;
  --bg-hover:    #1e2a4a;
  --border:      #2a2a4a;
  --border-light:#3a3a5c;

  /* Text */
  --txt:         #e2e8f0;
  --txt-muted:   #8892a4;
  --txt-dim:     #4a5568;

  /* Accent (overridden per skin) */
  --accent:      #4ade80;
  --accent2:     #ef4444;
  --accent3:     #facc15;
  --glow:        rgba(74,222,128,.35);

  /* UI */
  --radius:      8px;
  --radius-lg:   14px;
  --shadow:      0 4px 24px rgba(0,0,0,.5);
  --transition:  .18s ease;
}

/* --- Skin Themes ------------------------------------------- */
[data-skin="classique"] {
  --accent:  #4ade80;
  --accent2: #ef4444;
  --glow:    rgba(74,222,128,.35);
}
[data-skin="neon"] {
  --accent:  #00ffe7;
  --accent2: #ff2d78;
  --accent3: #bf5fff;
  --glow:    rgba(0,255,231,.4);
  --bg:      #080818;
  --bg-panel:#110c22;
  --bg-card: #1a0d2e;
  --border:  #2d1a4a;
}
[data-skin="pixel"] {
  --accent:  #78ff44;
  --accent2: #ff6600;
  --glow:    rgba(120,255,68,.3);
}
[data-skin="degrade"] {
  --accent:  #a78bfa;
  --accent2: #f472b6;
  --accent3: #38bdf8;
  --glow:    rgba(167,139,250,.35);
}
[data-skin="clair"] {
  --bg:          #f0f4f8;
  --bg-panel:    #ffffff;
  --bg-card:     #f8fafc;
  --bg-hover:    #e8edf4;
  --border:      #d1d9e6;
  --border-light:#a8b4c8;
  --txt:         #1a2236;
  --txt-muted:   #526180;
  --txt-dim:     #94a3b8;
  --accent:      #16a34a;
  --accent2:     #dc2626;
  --accent3:     #d97706;
  --glow:        rgba(22,163,74,.2);
  --shadow:      0 4px 24px rgba(0,0,0,.12);
}

/* --- Scrollbar -------------------------------------------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }

/* --- Body -------------------------------------------------- */
html, body {
  height: 100%;
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--txt);
  overflow-x: hidden;
}

/* --- Nav Bar ---------------------------------------------- */
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 52px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.btn-hub {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--txt-muted);
  text-decoration: none;
  font-size: .85rem;
  padding: 6px 10px;
  border-radius: var(--radius);
  transition: var(--transition);
}
.btn-hub:hover { background: var(--bg-hover); color: var(--txt); }

.nav-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--txt);
  letter-spacing: .5px;
}

.nav-actions { display: flex; gap: 6px; }

.btn-icon {
  background: none;
  border: 1px solid var(--border);
  color: var(--txt);
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.btn-icon:hover { background: var(--bg-hover); border-color: var(--border-light); }
.btn-icon.muted { opacity: .5; }

/* --- Main Layout ------------------------------------------ */
.main-layout {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 20px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px;
  align-items: start;
}

/* --- Game Section ----------------------------------------- */
.game-section {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* --- Game Header ------------------------------------------ */
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.mode-tabs, .skin-tabs {
  display: flex;
  gap: 6px;
}

.mode-tab {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--txt-muted);
  padding: 6px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-size: .85rem;
  font-weight: 500;
  transition: var(--transition);
}
.mode-tab:hover { border-color: var(--border-light); color: var(--txt); }
.mode-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
  font-weight: 700;
}

.skin-tab {
  background: var(--bg-card);
  border: 2px solid var(--border);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.skin-tab:hover { border-color: var(--border-light); transform: scale(1.1); }
.skin-tab.active { border-color: var(--accent); box-shadow: 0 0 0 3px var(--glow); }

/* --- Canvas Container ------------------------------------- */
.canvas-container {
  position: relative;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 1;
  width: 100%;
  max-width: 540px;
  margin: 0 auto;
  box-shadow: var(--shadow), 0 0 40px var(--glow);
  transition: box-shadow .3s ease;
  /* Centre le canvas à l'intérieur — le canvas peut être légèrement plus
     petit que le conteneur pour rester un multiple exact de gridSize. */
  display: flex;
  align-items: center;
  justify-content: center;
}
.canvas-container:has(#overlay-start:not(.hidden)) {
  box-shadow: var(--shadow);
}

#game-canvas {
  display: block;
  /* Le canvas doit afficher sa taille réelle (définie en JS) pour éviter
     que le CSS l'étire à 100% et crée des demi-carrés sur les bords.
     On le centre à la place. */
  margin: auto;
  max-width: 100%;
  max-height: 100%;
}

/* --- Overlays --------------------------------------------- */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8,8,20,.85);
  backdrop-filter: blur(4px);
  z-index: 10;
  animation: fadeIn .2s ease;
}
.overlay.hidden { display: none; }

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

.overlay-card {
  background: #1e2040;
  border: 1px solid #3a3a6a;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  text-align: center;
  min-width: 240px;
  max-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: var(--shadow);
  animation: slideUp .22s ease;
}

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

.overlay-icon { font-size: 2.5rem; line-height: 1; }

.overlay-card h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--txt);
  letter-spacing: .5px;
}

.overlay-subtitle {
  color: var(--txt-muted);
  font-size: .9rem;
}
.overlay-subtitle strong { color: var(--accent); }

.controls-hint {
  color: var(--txt-dim);
  font-size: .78rem;
  margin-top: -4px;
}

/* --- Buttons ---------------------------------------------- */
.btn-primary {
  background: var(--accent);
  color: #000;
  border: none;
  padding: 11px 28px;
  border-radius: 24px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 0 16px var(--glow);
}
.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: 0 4px 24px var(--glow);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: var(--bg-hover);
  color: var(--txt);
  border: 1px solid var(--border-light);
  padding: 9px 22px;
  border-radius: 24px;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.btn-secondary:hover { background: var(--bg-card); border-color: var(--accent); color: var(--accent); }

.btn-text {
  background: none;
  border: none;
  color: var(--txt-muted);
  font-size: .78rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: var(--transition);
}
.btn-text:hover { color: var(--accent2); }

/* --- Stats Grid (Game Over) ------------------------------- */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  text-align: left;
}

.stat-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 10px;
}
.stat-item .stat-label {
  font-size: .72rem;
  color: var(--txt-muted);
  text-transform: uppercase;
  letter-spacing: .5px;
}
.stat-item .stat-val {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}

.share-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.final-score {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent);
  text-shadow: 0 0 12px var(--glow);
}

.btn-share {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  color: var(--txt);
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: .95rem;
  transition: var(--transition);
}
.btn-share:hover { background: var(--bg-hover); border-color: var(--accent); }

.rank-display {
  font-size: .85rem;
  color: var(--txt-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 12px;
}
.rank-display.new-record {
  color: var(--accent3);
  border-color: var(--accent3);
  animation: pulse .6s ease infinite alternate;
}
.rank-display.hidden { display: none; }

@keyframes pulse {
  from { box-shadow: none; }
  to   { box-shadow: 0 0 12px var(--accent3); }
}

/* --- HUD -------------------------------------------------- */
.hud {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.hud-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 16px;
  text-align: center;
  min-width: 72px;
  flex: 1;
  max-width: 120px;
}
.hud-block.powerup-block {
  border-color: var(--accent3);
  animation: powerupGlow .8s ease infinite alternate;
}
.hud-block.hidden { display: none; }

@keyframes powerupGlow {
  from { box-shadow: none; }
  to   { box-shadow: 0 0 14px var(--accent3); }
}

.hud-label {
  display: block;
  font-size: .68rem;
  color: var(--txt-muted);
  text-transform: uppercase;
  letter-spacing: .6px;
  margin-bottom: 2px;
}
.hud-value {
  display: block;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--txt);
}
.powerup-val { color: var(--accent3); font-size: .9rem; }

/* --- Game Controls ---------------------------------------- */
.game-controls {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.btn-control {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--txt);
  padding: 9px 22px;
  border-radius: 24px;
  font-size: .88rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  flex: 1;
  max-width: 160px;
}
.btn-control:hover { border-color: var(--accent); color: var(--accent); background: var(--bg-hover); }
.btn-control.active { background: var(--accent); color: #000; border-color: var(--accent); }

/* --- D-Pad (mobile) --------------------------------------- */
.dpad {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 0;
  user-select: none;
}

.dpad-row {
  display: flex;
  gap: 4px;
}

.dpad-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  color: var(--txt);
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.dpad-btn:active { background: var(--accent); color: #000; border-color: var(--accent); }
.dpad-center { background: var(--bg-hover); }

/* --- Sidebar ---------------------------------------------- */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* --- Panel ------------------------------------------------ */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.panel h3 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--txt);
  letter-spacing: .4px;
}

/* --- Leaderboard ------------------------------------------ */
.leaderboard-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.leaderboard-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: .85rem;
  transition: var(--transition);
}

.leaderboard-list li.current-score {
  border-color: var(--accent);
  background: rgba(74,222,128,.08);
  color: var(--accent);
}
[data-skin="neon"] .leaderboard-list li.current-score {
  border-color: var(--accent);
  background: rgba(0,255,231,.08);
}

.lb-rank {
  font-size: .75rem;
  font-weight: 700;
  color: var(--txt-dim);
  min-width: 16px;
  text-align: center;
}
.lb-rank.gold   { color: #facc15; }
.lb-rank.silver { color: #94a3b8; }
.lb-rank.bronze { color: #b45309; }

.lb-score {
  font-weight: 700;
  color: var(--txt);
  margin-left: auto;
}

.lb-empty {
  color: var(--txt-muted);
  font-style: italic;
  text-align: center;
  font-size: .82rem;
  background: none !important;
  border: none !important;
  padding: 12px 0 !important;
}

.rank-msg {
  font-size: .8rem;
  color: var(--accent);
  text-align: center;
  margin-top: 8px;
  font-weight: 600;
}
.rank-msg.hidden { display: none; }

/* --- Skin Info Panel -------------------------------------- */
.skin-info-panel h3 {
  font-size: .95rem;
  margin-bottom: 6px;
}
.skin-desc {
  font-size: .8rem;
  color: var(--txt-muted);
  margin-bottom: 10px;
}
.skin-preview-bar {
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(to right, var(--accent), var(--accent2));
  box-shadow: 0 0 8px var(--glow);
}

/* --- Settings Modal --------------------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  backdrop-filter: blur(6px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn .18s ease;
}
.modal-backdrop.hidden { display: none; }

.modal {
  background: var(--bg-panel);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  width: min(480px, 92vw);
  box-shadow: var(--shadow);
  animation: slideUp .22s ease;
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--border);
}
.modal-head h2 { font-size: 1.1rem; font-weight: 700; }

.modal-body {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.modal-foot {
  padding: 14px 20px 18px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.setting-label {
  display: flex;
  justify-content: space-between;
  font-size: .88rem;
  color: var(--txt);
  font-weight: 500;
}

.setting-val {
  color: var(--accent);
  font-weight: 700;
}

.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--glow);
  cursor: pointer;
  transition: var(--transition);
}
.slider::-webkit-slider-thumb:hover { transform: scale(1.2); }

.select-input {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  color: var(--txt);
  padding: 8px 12px;
  border-radius: var(--radius);
  font-size: .88rem;
  cursor: pointer;
  outline: none;
  width: 100%;
}
.select-input:focus { border-color: var(--accent); }

/* --- Power-up animation overlay on canvas ----------------- */
.canvas-container.powerup-flash::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 3px solid var(--accent3);
  border-radius: var(--radius-lg);
  animation: borderFlash .5s ease forwards;
  pointer-events: none;
}
@keyframes borderFlash {
  0%   { opacity: 1; }
  100% { opacity: 0; }
}

/* --- Score flash ------------------------------------------ */
#hud-score.flash {
  animation: scoreFlash .25s ease;
}
@keyframes scoreFlash {
  0%   { transform: scale(1); color: var(--txt); }
  50%  { transform: scale(1.3); color: var(--accent); }
  100% { transform: scale(1); color: var(--txt); }
}

/* --- Helpers --------------------------------------------- */
.hidden { display: none !important; }
.desktop-only { display: block; }
.mobile-only  { display: none; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet (≤ 900px) */
@media (max-width: 900px) {
  .main-layout {
    grid-template-columns: 1fr;
    padding: 14px;
    gap: 14px;
  }
  .sidebar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
}

/* Mobile (≤ 600px) */
@media (max-width: 600px) {
  .nav-bar { padding: 0 12px; }
  .nav-title { font-size: 1rem; }

  .main-layout { padding: 10px; gap: 10px; }

  .game-header { flex-wrap: wrap; gap: 8px; }
  .mode-tabs { flex: 1; }
  .skin-tabs { justify-content: flex-end; }

  .canvas-container { max-width: 100%; }

  .hud { gap: 5px; }
  .hud-block { padding: 6px 8px; min-width: 58px; }
  .hud-value { font-size: .95rem; }

  .dpad { display: flex; }

  .desktop-only { display: none; }
  .mobile-only  { display: block; }

  .sidebar {
    grid-template-columns: 1fr;
  }

  .btn-control { padding: 8px 14px; font-size: .82rem; }
}

/* Very small screens */
@media (max-width: 380px) {
  .skin-tab { width: 30px; height: 30px; font-size: .85rem; }
  .dpad-btn { width: 48px; height: 48px; }
}

/* ============================================================
   PIXEL ART SKIN — special body grid style
   ============================================================ */
[data-skin="pixel"] .canvas-container {
  image-rendering: pixelated;
}

/* ============================================================
   NEON SKIN — extra glow on canvas
   ============================================================ */
[data-skin="neon"] .canvas-container {
  box-shadow: var(--shadow),
              0 0 30px rgba(0,255,231,.2),
              0 0 60px rgba(191,95,255,.1);
}
[data-skin="neon"] .btn-primary {
  box-shadow: 0 0 20px rgba(0,255,231,.5), 0 0 40px rgba(0,255,231,.2);
}
[data-skin="neon"] .hud-block {
  border-color: rgba(0,255,231,.2);
}
[data-skin="neon"] .hud-value {
  text-shadow: 0 0 8px var(--accent);
}

/* ============================================================
   CLAIR SKIN — thème lumineux blanc/gris
   ============================================================ */

/* Overlay card plus contrasté sur fond blanc */
[data-skin="clair"] .overlay-card {
  background: #ffffff;
  border: 1px solid #c8d4e4;
  box-shadow: 0 8px 32px rgba(0,0,0,.15);
}

/* Canvas : ombre légère adaptée au fond clair */
[data-skin="clair"] .canvas-container {
  border-color: #c8d4e4;
  box-shadow: 0 4px 20px rgba(0,0,0,.1), 0 0 0 1px rgba(0,0,0,.04);
}

/* Nav bar */
[data-skin="clair"] .nav-bar {
  border-bottom-color: #d1d9e6;
}

/* Scrollbar claire */
[data-skin="clair"] ::-webkit-scrollbar-track { background: #f0f4f8; }
[data-skin="clair"] ::-webkit-scrollbar-thumb { background: #a8b4c8; }

/* Mode tabs actif */
[data-skin="clair"] .mode-tab.active {
  color: #fff;
}

/* HUD blocks : ombre douce */
[data-skin="clair"] .hud-block {
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
}

/* Boutons contrôle */
[data-skin="clair"] .btn-control {
  background: #ffffff;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
}
[data-skin="clair"] .btn-control:hover {
  background: #f0f4f8;
}

/* Modal */
[data-skin="clair"] .modal-backdrop {
  background: rgba(0,0,0,.4);
}
[data-skin="clair"] .modal {
  box-shadow: 0 8px 40px rgba(0,0,0,.2);
}

/* Select & slider fond clair */
[data-skin="clair"] .select-input {
  background: #f8fafc;
}
[data-skin="clair"] .slider {
  background: #d1d9e6;
}

/* Leaderboard item courant */
[data-skin="clair"] .leaderboard-list li.current-score {
  background: rgba(22,163,74,.08);
}

/* D-pad */
[data-skin="clair"] .dpad-btn {
  background: #ffffff;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
}
[data-skin="clair"] .dpad-btn:active {
  background: var(--accent);
  color: #fff;
}

/* Overlay : fond clair semi-transparent pour voir le canvas */
[data-skin="clair"] .overlay {
  background: rgba(230, 237, 245, 0.88);
}

/* Texte sombre dans les overlays en mode clair */
[data-skin="clair"] .overlay-card h2 { color: #1a2236; }
[data-skin="clair"] .controls-hint   { color: #526180; }