/* ============================================
   NUMERIXX - Fusionne les tuiles !
   © 2024-2026 PRESTATIC (SARL) - SOUILAH AKIM
   ============================================ */

:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #12122a;
    --bg-tertiary: #1a1a3a;
    --bg-card: rgba(255,255,255,0.04);
    --bg-card-hover: rgba(255,255,255,0.08);
    --glass: rgba(255,255,255,0.06);
    --glass-border: rgba(255,255,255,0.1);
    --text-primary: #fff;
    --text-secondary: #b0b0c0;
    --text-muted: #606070;
    --accent-purple: #6c5ce7;
    --accent-purple-light: #a29bfe;
    --accent-purple-glow: rgba(108,92,231,0.4);
    --accent-cyan: #00cec9;
    --accent-cyan-glow: rgba(0,206,201,0.4);
    --accent-orange: #fdcb6e;
    --accent-red: #d63031;
    --accent-green: #00b894;
    --accent-pink: #fd79a8;
    --grid-size: clamp(280px, 80vmin, 420px);
    --cell-gap: clamp(8px, 2vmin, 12px);
    --cell-radius: clamp(8px, 2vmin, 14px);
    --radius: 14px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    touch-action: none;
}

/* ============ SCREENS ============ */
.screen { position:fixed; inset:0; display:flex; align-items:center; justify-content:center; flex-direction:column; opacity:0; visibility:hidden; transition: opacity 0.4s, visibility 0.4s; z-index:1; }
.screen.active { opacity:1; visibility:visible; z-index:10; }

/* ============ HOME ============ */
#screenHome {
    background: radial-gradient(ellipse at 30% 20%, rgba(108,92,231,0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 80%, rgba(0,206,201,0.1) 0%, transparent 50%),
                var(--bg-primary);
    overflow-y: auto;
}

.floating-tiles { position:absolute; inset:0; overflow:hidden; pointer-events:none; z-index:0; }
.floating-tile {
    position:absolute; display:flex; align-items:center; justify-content:center;
    border-radius:8px; font-family:'Orbitron',sans-serif; font-weight:800; opacity:0.06;
    animation: floatUp linear infinite; pointer-events:none;
}
@keyframes floatUp { 0%{transform:translateY(110vh) rotate(0deg)} 100%{transform:translateY(-120px) rotate(360deg)} }

.back-to-hub {
    position:absolute; top:20px; left:24px; z-index:5; display:inline-flex; align-items:center; gap:8px;
    padding:10px 24px; background:rgba(108,92,231,0.12); border:1px solid rgba(108,92,231,0.3);
    border-radius:50px; color:var(--accent-purple-light); text-decoration:none; font-size:0.9rem; font-weight:500;
    transition:all 0.3s; backdrop-filter:blur(10px);
}
.back-to-hub:hover { background:rgba(108,92,231,0.25); border-color:rgba(108,92,231,0.6); color:#fff; transform:translateX(-4px); }

.home-container { position:relative; z-index:1; text-align:center; max-width:480px; width:100%; padding:40px 20px; }

.home-logo { display:flex; justify-content:center; gap:8px; margin-bottom:24px; }
.logo-tile {
    display:inline-flex; align-items:center; justify-content:center; width:56px; height:56px;
    background:linear-gradient(135deg, var(--accent-purple), var(--accent-purple-light));
    border-radius:10px; font-family:'Orbitron',sans-serif; font-weight:800; font-size:1.5rem; color:#fff;
    box-shadow:0 4px 15px var(--accent-purple-glow);
    animation: tileFloat 2s ease-in-out infinite;
    animation-delay: calc(var(--i) * 0.15s);
}
@keyframes tileFloat { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }

.home-title { font-family:'Orbitron',sans-serif; font-size:clamp(2.4rem,8vw,3.2rem); font-weight:900; color:#fff; margin-bottom:6px; text-shadow:0 0 40px rgba(108,92,231,0.3); }
.home-title span { background:linear-gradient(135deg,var(--accent-purple),var(--accent-cyan)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.home-subtitle { font-size:1.05rem; color:var(--text-secondary); margin-bottom:12px; }
.home-howto { font-size:0.82rem; color:var(--text-muted); line-height:1.5; max-width:340px; margin:0 auto 32px; }

.home-menu { display:flex; flex-direction:column; gap:12px; margin-bottom:44px; }
.menu-btn {
    display:flex; align-items:center; gap:16px; width:100%; padding:18px 24px;
    background:var(--glass); border:1px solid var(--glass-border); border-radius:var(--radius);
    color:var(--text-primary); font-family:'Poppins',sans-serif; font-size:1rem; font-weight:500;
    cursor:pointer; transition:var(--transition); text-align:left; backdrop-filter:blur(10px);
}
.menu-btn:hover { background:var(--bg-card-hover); border-color:var(--accent-purple); transform:translateX(8px); box-shadow:0 0 30px rgba(108,92,231,0.15); }
.menu-btn.primary { background:linear-gradient(135deg,rgba(108,92,231,0.2),rgba(0,206,201,0.1)); border-color:var(--accent-purple); }
.menu-btn.primary:hover { background:linear-gradient(135deg,rgba(108,92,231,0.35),rgba(0,206,201,0.2)); box-shadow:0 0 40px rgba(108,92,231,0.25); }
.btn-icon { font-size:1.4rem; } .btn-label { flex:1; } .btn-arrow { color:var(--text-muted); font-size:1.2rem; transition:var(--transition); }
.menu-btn:hover .btn-arrow { color:var(--accent-purple); transform:translateX(4px); }

.home-footer { color:var(--text-muted); font-size:0.8rem; }
.home-footer strong { color:var(--accent-purple); }
.home-legal { display:flex; gap:12px; justify-content:center; flex-wrap:wrap; margin:8px 0 4px; }
.home-legal a { color:#8888a0; text-decoration:none; font-size:0.7rem; transition:color 0.3s; }
.home-legal a:hover { color:var(--accent-purple); }
.home-cookie-btn { background:none; border:none; color:#8888a0; font-size:0.7rem; font-family:'Poppins',sans-serif; cursor:pointer; transition:color 0.3s; padding:0; }
.home-cookie-btn:hover { color:var(--accent-purple); }
.home-version { margin-top:4px; font-size:0.7rem; }

/* ============ GAME HEADER ============ */
#screenGame {
    background: radial-gradient(ellipse at 50% 0%, rgba(108,92,231,0.08) 0%, transparent 60%), var(--bg-primary);
    justify-content: flex-start;
}

.game-header {
    display:flex; align-items:center; justify-content:space-between; width:100%;
    padding:10px 16px; background:rgba(0,0,0,0.3); border-bottom:1px solid var(--glass-border);
    backdrop-filter:blur(12px); flex-shrink:0;
}
.game-header-left { display:flex; align-items:center; gap:8px; }
.game-back-btn {
    display:flex; align-items:center; justify-content:center; width:38px; height:38px;
    background:var(--glass); border:1px solid var(--glass-border); border-radius:50%;
    color:var(--text-secondary); cursor:pointer; transition:var(--transition); font-size:1.1rem;
}
.game-back-btn:hover { background:var(--bg-card-hover); color:var(--accent-purple); border-color:var(--accent-purple); }
.game-hub-link {
    padding:6px 14px; background:rgba(108,92,231,0.12); border:1px solid rgba(108,92,231,0.25);
    border-radius:50px; color:var(--accent-purple-light); text-decoration:none; font-size:0.75rem; font-weight:500; transition:all 0.3s;
}
.game-hub-link:hover { background:rgba(108,92,231,0.25); color:#fff; }

.game-title {
    font-family:'Orbitron',sans-serif; font-size:1.2rem; font-weight:800;
    background:linear-gradient(135deg,var(--accent-purple),var(--accent-cyan));
    -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}

.game-header-right { display:flex; gap:8px; }
.score-box {
    display:flex; flex-direction:column; align-items:center; padding:6px 16px;
    background:var(--glass); border:1px solid var(--glass-border); border-radius:var(--radius-sm);
    min-width:70px; backdrop-filter:blur(8px);
}
.score-box.best { border-color:rgba(108,92,231,0.3); }
.score-label { font-size:0.6rem; color:var(--text-muted); text-transform:uppercase; letter-spacing:1px; }
.score-value { font-family:'Orbitron',sans-serif; font-size:1rem; font-weight:800; color:var(--text-primary); }
.score-box.best .score-value { color:var(--accent-cyan); }

.game-sub-header { flex-shrink:0; display:flex; align-items:center; justify-content:center; gap:10px; padding:8px 16px; flex-wrap:wrap; }
.game-player-badge {
    padding:6px 16px; background:linear-gradient(135deg,rgba(108,92,231,0.15),rgba(0,206,201,0.08));
    border:1px solid rgba(108,92,231,0.3); border-radius:50px; font-size:0.75rem; font-weight:600;
    color:var(--accent-purple-light); letter-spacing:0.3px;
}
.game-player-badge:empty { display:none; }

.game-action-btn {
    display:flex; align-items:center; justify-content:center; width:38px; height:38px;
    background:var(--glass); border:1px solid var(--glass-border); border-radius:50%;
    color:var(--text-secondary); cursor:pointer; transition:var(--transition); font-size:1rem;
}
.game-action-btn:hover { background:var(--bg-card-hover); border-color:var(--accent-cyan); }

.game-replay-btn {
    padding:6px 18px; background:var(--glass); border:1px solid var(--glass-border); border-radius:50px;
    font-family:'Poppins',sans-serif; font-size:0.75rem; font-weight:600; color:var(--accent-orange);
    cursor:pointer; transition:var(--transition);
}
.game-replay-btn:hover { background:rgba(253,203,110,0.12); border-color:var(--accent-orange); transform:scale(1.05); }

/* ============ GAME BOARD ============ */
.game-main { flex:1; display:flex; align-items:center; justify-content:center; width:100%; min-height:0; gap:16px; padding:0 16px; }
.game-board-area { display:flex; align-items:center; justify-content:center; padding:8px; }

.grid-container {
    position: relative;
    width: var(--grid-size);
    height: var(--grid-size);
    background: var(--bg-tertiary);
    border-radius: var(--radius);
    padding: var(--cell-gap);
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
}

.grid-bg {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(4, 1fr);
    gap: var(--cell-gap);
    width: 100%;
    height: 100%;
}

.cell-bg {
    background: rgba(255,255,255,0.04);
    border-radius: var(--cell-radius);
}

.tile-layer {
    position: absolute;
    inset: 0;
    padding: var(--cell-gap);
}

.tile {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--cell-radius);
    font-family: 'Orbitron', sans-serif;
    font-weight: 800;
    color: #fff;
    transition: top 0.12s ease, left 0.12s ease;
    z-index: 1;
}

.tile.new { animation: tileAppear 0.2s ease; }
.tile.merged { animation: tilePop 0.2s ease; z-index: 2; }

/* Tile colors */
.tile-2    { background: linear-gradient(135deg, #3d3d5c, #4a4a6a); font-size: clamp(1.4rem,4vmin,2rem); }
.tile-4    { background: linear-gradient(135deg, #4a4a7a, #5a5a8a); font-size: clamp(1.4rem,4vmin,2rem); }
.tile-8    { background: linear-gradient(135deg, #6c5ce7, #7c6cf7); font-size: clamp(1.4rem,4vmin,2rem); }
.tile-16   { background: linear-gradient(135deg, #5a4bd1, #6c5ce7); font-size: clamp(1.3rem,3.5vmin,1.8rem); }
.tile-32   { background: linear-gradient(135deg, #0984e3, #00cec9); font-size: clamp(1.3rem,3.5vmin,1.8rem); }
.tile-64   { background: linear-gradient(135deg, #00b894, #00cec9); font-size: clamp(1.3rem,3.5vmin,1.8rem); }
.tile-128  { background: linear-gradient(135deg, #fdcb6e, #e17055); font-size: clamp(1.1rem,3vmin,1.5rem); box-shadow: 0 0 20px rgba(253,203,110,0.3); }
.tile-256  { background: linear-gradient(135deg, #e17055, #d63031); font-size: clamp(1.1rem,3vmin,1.5rem); box-shadow: 0 0 20px rgba(214,48,49,0.3); }
.tile-512  { background: linear-gradient(135deg, #fd79a8, #e84393); font-size: clamp(1rem,2.8vmin,1.4rem); box-shadow: 0 0 25px rgba(232,67,147,0.3); }
.tile-1024 { background: linear-gradient(135deg, #a29bfe, #6c5ce7); font-size: clamp(0.9rem,2.5vmin,1.2rem); box-shadow: 0 0 30px var(--accent-purple-glow); }
.tile-2048 { background: linear-gradient(135deg, #00cec9, #6c5ce7); font-size: clamp(0.9rem,2.5vmin,1.2rem); box-shadow: 0 0 40px var(--accent-cyan-glow); animation: glowPulse 2s infinite; }
.tile-super { background: linear-gradient(135deg, #ffd700, #ff6b6b, #6c5ce7, #00cec9); background-size:300% 300%; animation: rainbow 3s ease infinite; font-size: clamp(0.8rem,2.2vmin,1.1rem); box-shadow: 0 0 40px rgba(255,215,0,0.4); }

@keyframes tileAppear { 0%{transform:scale(0);opacity:0} 100%{transform:scale(1);opacity:1} }
@keyframes tilePop { 0%{transform:scale(1)} 50%{transform:scale(1.2)} 100%{transform:scale(1)} }
@keyframes glowPulse { 0%,100%{box-shadow:0 0 20px var(--accent-cyan-glow)} 50%{box-shadow:0 0 40px var(--accent-cyan-glow),0 0 60px rgba(0,206,201,0.15)} }
@keyframes rainbow { 0%{background-position:0% 50%} 50%{background-position:100% 50%} 100%{background-position:0% 50%} }

/* ============ LEADERBOARD ============ */
.game-leaderboard {
    width:200px; flex-shrink:0; background:var(--bg-card); border:1px solid var(--glass-border);
    border-radius:var(--radius); padding:14px; display:flex; flex-direction:column;
    align-self:center; backdrop-filter:blur(10px); max-height:380px;
}
.lb-header { display:flex; align-items:center; gap:6px; margin-bottom:12px; padding-bottom:8px; border-bottom:1px solid var(--glass-border); }
.lb-icon { font-size:1.1rem; }
.lb-title { font-family:'Orbitron',sans-serif; font-size:0.85rem; font-weight:700; background:linear-gradient(135deg,var(--accent-purple),var(--accent-cyan)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.lb-list { display:flex; flex-direction:column; gap:6px; flex:1; overflow-y:auto; }
.lb-empty { font-size:0.75rem; color:var(--text-muted); text-align:center; padding:16px 0; }
.lb-row { display:flex; align-items:center; gap:8px; padding:6px 8px; border-radius:8px; background:rgba(255,255,255,0.02); }
.lb-row:nth-child(1) { background:rgba(255,215,0,0.08); }
.lb-row:nth-child(2) { background:rgba(192,192,192,0.06); }
.lb-row:nth-child(3) { background:rgba(205,127,50,0.06); }
.lb-row.lb-me-row { border:1px solid rgba(108,92,231,0.3); background:rgba(108,92,231,0.08); }
.lb-rank { font-family:'Orbitron',sans-serif; font-size:0.75rem; font-weight:800; width:20px; text-align:center; flex-shrink:0; }
.lb-row:nth-child(1) .lb-rank { color:#ffd700; }
.lb-row:nth-child(2) .lb-rank { color:#c0c0c0; }
.lb-row:nth-child(3) .lb-rank { color:#cd7f32; }
.lb-name { flex:1; font-size:0.75rem; font-weight:500; color:var(--text-secondary); overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.lb-score { font-family:'Orbitron',sans-serif; font-size:0.7rem; font-weight:700; color:var(--accent-cyan); flex-shrink:0; }
.lb-tile-badge { font-size:0.6rem; color:var(--accent-orange); }
.lb-me { margin-top:8px; padding-top:8px; border-top:1px solid var(--glass-border); font-size:0.7rem; color:var(--text-muted); text-align:center; }
.lb-me:empty { display:none; }
.lb-me strong { color:var(--accent-purple-light); font-weight:700; }

.game-howto {
    flex-shrink:0; width:100%; text-align:center; padding:8px 20px; font-size:0.75rem;
    color:var(--text-muted); line-height:1.4;
}

.lb-mobile-toggle {
    display:none; position:fixed; bottom:max(16px,env(safe-area-inset-bottom)); right:16px;
    width:48px; height:48px; border-radius:50%; background:linear-gradient(135deg,var(--accent-purple),var(--accent-cyan));
    border:none; font-size:1.3rem; cursor:pointer; z-index:100; box-shadow:0 4px 20px var(--accent-purple-glow); transition:var(--transition);
}
.lb-mobile-toggle:active { transform:scale(0.9); }
.game-leaderboard.lb-mobile-open { position:fixed; top:50%; left:50%; transform:translate(-50%,-50%); width:85%; max-width:320px; max-height:70vh; z-index:200; background:var(--bg-secondary); box-shadow:var(--shadow); animation:fadeInUp 0.3s ease; }
.lb-mobile-backdrop { position:fixed; inset:0; background:rgba(0,0,0,0.6); z-index:150; }

/* ============ GAME OVER ============ */
.gameover-overlay {
    position:fixed; inset:0; background:rgba(0,0,0,0.75); backdrop-filter:blur(6px);
    display:flex; align-items:center; justify-content:center; z-index:500;
    opacity:0; visibility:hidden; transition:opacity 0.4s, visibility 0.4s;
}
.gameover-overlay.active { opacity:1; visibility:visible; }
.gameover-panel {
    background:var(--bg-secondary); border:1px solid var(--glass-border); border-radius:var(--radius-lg);
    padding:40px 32px; text-align:center; max-width:360px; width:90%;
    transform:translateY(20px) scale(0.96); transition:transform 0.3s;
}
.gameover-overlay.active .gameover-panel { transform:translateY(0) scale(1); }
.gameover-panel h2 {
    font-family:'Orbitron',sans-serif; font-size:1.6rem; font-weight:800; margin-bottom:16px;
    background:linear-gradient(135deg,var(--accent-purple),var(--accent-cyan));
    -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
.gameover-score, .gameover-tile { font-size:1rem; color:var(--text-secondary); margin-bottom:8px; }
.gameover-score strong { color:var(--accent-cyan); font-family:'Orbitron',sans-serif; font-size:1.3rem; }
.gameover-tile strong { color:var(--accent-orange); font-family:'Orbitron',sans-serif; font-size:1.3rem; }
.gameover-actions { display:flex; gap:10px; margin-top:24px; }

/* ============ MODAL ============ */
.modal-overlay {
    position:fixed; inset:0; background:rgba(0,0,0,0.7); backdrop-filter:blur(6px);
    display:flex; align-items:center; justify-content:center; z-index:5000;
    opacity:0; visibility:hidden; transition:opacity 0.3s, visibility 0.3s; padding:20px;
}
.modal-overlay.active { opacity:1; visibility:visible; }
.modal {
    background:var(--bg-secondary); border:1px solid var(--glass-border); border-radius:var(--radius-lg);
    padding:32px; max-width:420px; width:100%; max-height:85vh; overflow-y:auto; box-shadow:var(--shadow);
    transform:translateY(20px) scale(0.96); transition:transform 0.3s ease;
}
.modal-overlay.active .modal { transform:translateY(0) scale(1); }
.modal-close { position:absolute; top:16px; right:16px; width:32px; height:32px; background:var(--glass); border:1px solid var(--glass-border); border-radius:50%; color:var(--text-secondary); font-size:1.1rem; cursor:pointer; display:flex; align-items:center; justify-content:center; transition:var(--transition); }
.modal-close:hover { background:var(--bg-card-hover); color:#fff; }
.modal h2 { font-family:'Orbitron',sans-serif; font-size:1.3rem; font-weight:700; margin-bottom:20px; text-align:center; background:linear-gradient(135deg,var(--accent-purple),var(--accent-cyan)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.modal p { font-size:0.88rem; color:var(--text-secondary); line-height:1.6; margin-bottom:10px; }

.modal-btn {
    flex:1; padding:14px; border:none; border-radius:var(--radius-sm); font-family:'Poppins',sans-serif;
    font-size:0.9rem; font-weight:600; cursor:pointer; transition:var(--transition);
}
.modal-btn.btn-primary { background:linear-gradient(135deg,var(--accent-purple),var(--accent-cyan)); color:#fff; }
.modal-btn.btn-primary:hover { transform:translateY(-2px); box-shadow:0 6px 20px var(--accent-purple-glow); }
.modal-btn.btn-secondary { background:var(--glass); border:1px solid var(--glass-border); color:var(--text-primary); }
.modal-btn.btn-secondary:hover { background:var(--bg-card-hover); }

/* Pseudo input */
.pseudo-input {
    width:100%; padding:14px 18px; background:var(--bg-tertiary); border:1px solid var(--glass-border);
    border-radius:var(--radius-sm); color:var(--text-primary); font-family:'Poppins',sans-serif;
    font-size:1rem; font-weight:500; outline:none; transition:var(--transition); text-align:center; margin-bottom:16px;
}
.pseudo-input:focus { border-color:var(--accent-purple); box-shadow:0 0 20px var(--accent-purple-glow); }
.pseudo-input::placeholder { color:var(--text-muted); }

.modal-actions { display:flex; gap:10px; margin-top:20px; }

/* ============ TOAST ============ */
.toast-container { position:fixed; top:10%; left:50%; transform:translateX(-50%); z-index:9999; display:flex; flex-direction:column; align-items:center; gap:8px; pointer-events:none; }
.toast { padding:14px 28px; background:rgba(255,255,255,0.95); color:#0a0a1a; border-radius:var(--radius-sm); font-size:0.95rem; font-weight:700; box-shadow:0 8px 30px rgba(0,0,0,0.5); animation:toastIn 0.25s ease; pointer-events:auto; }
.toast.fade-out { animation:toastOut 0.3s ease forwards; }

/* ============ ANIMATIONS ============ */
@keyframes fadeInUp { from{opacity:0;transform:translateY(20px)} to{opacity:1;transform:translateY(0)} }
@keyframes toastIn { from{opacity:0;transform:translateY(-12px)} to{opacity:1;transform:translateY(0)} }
@keyframes toastOut { from{opacity:1;transform:translateY(0)} to{opacity:0;transform:translateY(-12px)} }

/* ============ RESPONSIVE ============ */
@media (max-width:768px) {
    .game-leaderboard { display:none; }
    .lb-mobile-toggle { display:flex; align-items:center; justify-content:center; }
    .game-leaderboard.lb-mobile-open { display:flex; }
    .game-main { padding:0 8px; }
}
@media (max-width:480px) {
    .back-to-hub { top:12px; left:12px; padding:8px 16px; font-size:0.8rem; }
    .game-hub-link { font-size:0.65rem; padding:5px 10px; }
    .score-box { padding:4px 10px; min-width:58px; }
    .score-value { font-size:0.85rem; }
}
@media (max-width:380px) {
    .game-hub-link { font-size:0.6rem; padding:4px 8px; }
}
@media (max-height:600px) {
    .game-sub-header { padding:4px 12px; }
}