/* ============================================================
   NumaEarth — Global Stylesheet
   Professional dark-mode design | AppLovin MAX compliant site
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap");

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#6366F1;--primary-d:#4F46E5;--pink:#EC4899;--gold:#F59E0B;
  --green:#10B981;--cyan:#06B6D4;--bg0:#0F172A;--bg1:#1E293B;--bg2:#2C3A50;
  --card:rgba(255,255,255,.06);--border:rgba(255,255,255,.10);
  --text:#F8FAFC;--muted:#94A3B8;--radius:14px;
  --shadow:0 8px 32px rgba(0,0,0,.4);--transition:.25s ease;
}
html{scroll-behavior:smooth}
body{font-family:"Inter",sans-serif;background:var(--bg0);color:var(--text);line-height:1.65;overflow-x:hidden}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--pink)}
img{max-width:100%;display:block}
.container{max-width:1140px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--sm{padding:64px 0}
.grad{background:linear-gradient(135deg,var(--primary) 0%,var(--pink) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.grad-gold{background:linear-gradient(135deg,var(--gold) 0%,#F97316 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.glass{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:12px;font-weight:600;font-size:15px;cursor:pointer;border:none;transition:all var(--transition);text-decoration:none}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--pink));color:#fff;box-shadow:0 4px 20px rgba(99,102,241,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(99,102,241,.55);color:#fff}
.btn-outline{background:transparent;color:var(--text);border:1.5px solid var(--border)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-gold{background:linear-gradient(135deg,var(--gold),#F97316);color:#fff;box-shadow:0 4px 20px rgba(245,158,11,.35)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(245,158,11,.5);color:#fff}

/* NAVBAR */
.navbar{position:fixed;top:0;left:0;right:0;z-index:999;padding:16px 0;transition:background var(--transition),box-shadow var(--transition)}
.navbar.scrolled{background:rgba(15,23,42,.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:0 1px 0 var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.nav-logo{font-size:20px;font-weight:800;display:flex;align-items:center;gap:10px;color:var(--text)}
.nav-links{display:flex;align-items:center;gap:8px;list-style:none}
.nav-links a{color:var(--muted);font-size:14px;font-weight:500;padding:7px 14px;border-radius:8px;transition:all var(--transition)}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:var(--card)}
.nav-cta{margin-left:8px}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;background:none;border:none}
.hamburger span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:all var(--transition)}

/* HERO */
.hero{min-height:100vh;display:flex;align-items:center;padding-top:80px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 50% -10%,rgba(99,102,241,.25) 0%,transparent 60%);pointer-events:none}
.hero-inner{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:64px}
.hero-tag{display:inline-flex;align-items:center;gap:6px;background:rgba(99,102,241,.15);border:1px solid rgba(99,102,241,.3);color:#A5B4FC;font-size:13px;font-weight:600;padding:6px 14px;border-radius:100px;margin-bottom:20px}
.hero h1{font-size:clamp(36px,5vw,64px);font-weight:900;line-height:1.1;margin-bottom:20px;letter-spacing:-1px}
.hero p{font-size:18px;color:var(--muted);margin-bottom:36px;max-width:480px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:32px;margin-top:48px;padding-top:40px;border-top:1px solid var(--border)}
.stat-item{display:flex;flex-direction:column;gap:4px}
.stat-num{font-size:24px;font-weight:800}
.stat-label{font-size:13px;color:var(--muted)}

/* PHONE MOCKUP */
.hero-visual{display:flex;justify-content:center;align-items:center;position:relative}
.phone-wrap{position:relative;width:280px}
.phone-frame{position:relative;width:280px;background:#0F172A;border-radius:42px;border:3px solid #334155;box-shadow:0 0 0 6px #1E293B,0 0 0 7.5px rgba(99,102,241,.3),0 32px 80px rgba(0,0,0,.7),inset 0 0 0 1px rgba(255,255,255,.1);overflow:hidden;aspect-ratio:9/19.5}
.phone-frame::before{content:"";position:absolute;top:13px;left:50%;transform:translateX(-50%);width:78px;height:18px;background:#020617;border-radius:20px;z-index:5;box-shadow:0 0 0 1px rgba(255,255,255,.08),0 2px 4px rgba(0,0,0,.5)}
.phone-frame::after{content:"";position:absolute;inset:0;border-radius:40px;background:linear-gradient(135deg,rgba(255,255,255,.12) 0%,rgba(255,255,255,.02) 40%,transparent 60%);pointer-events:none;z-index:6}
.phone-frame img{width:100%;height:100%;object-fit:cover;object-position:top;display:block}
.phone-glow{position:absolute;inset:-30px;background:radial-gradient(ellipse 70% 60% at 50% 50%,rgba(99,102,241,.2) 0%,transparent 70%);pointer-events:none;z-index:-1}
.floating-tile{position:absolute;width:54px;height:54px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:900;color:#fff;animation:float 3s ease-in-out infinite;box-shadow:0 8px 24px rgba(0,0,0,.3)}
.tile-2048{background:linear-gradient(135deg,#8B5CF6,#6D28D9);top:10%;right:-30px;animation-delay:0s}
.tile-1024{background:linear-gradient(135deg,#3B82F6,#1D4ED8);bottom:25%;right:-40px;animation-delay:.8s}
.tile-512{background:linear-gradient(135deg,#06B6D4,#0891B2);top:35%;left:-40px;animation-delay:1.6s}
.tile-256{background:linear-gradient(135deg,#10B981,#059669);bottom:15%;left:-30px;animation-delay:.4s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* SECTION TITLES */
.section-label{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--primary);margin-bottom:12px}
.section-title{font-size:clamp(28px,4vw,44px);font-weight:800;line-height:1.15;margin-bottom:16px;letter-spacing:-.5px}
.section-sub{font-size:17px;color:var(--muted);max-width:560px}
.text-center{text-align:center}
.text-center .section-sub{margin:0 auto}

/* FEATURES */
.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;margin-top:56px}
.feature-card{padding:28px;transition:transform var(--transition),border-color var(--transition)}
.feature-card:hover{transform:translateY(-4px);border-color:rgba(99,102,241,.35)}
.feature-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.feature-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--muted);line-height:1.6}

/* SCREENSHOTS */
.screenshots-track{display:flex;gap:20px;overflow-x:auto;padding:24px 0 32px;scrollbar-width:none;-webkit-overflow-scrolling:touch;scroll-snap-type:x mandatory}
.screenshots-track::-webkit-scrollbar{display:none}
.shot-wrap{flex-shrink:0;width:200px;scroll-snap-align:start}
.shot-wrap img{width:200px;border-radius:24px;border:1.5px solid var(--border);box-shadow:var(--shadow);transition:transform var(--transition)}
.shot-wrap img:hover{transform:scale(1.04)}

/* HOW TO PLAY */
.how-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;margin-top:56px}
.step-list{display:flex;flex-direction:column;gap:24px}
.step-item{display:flex;gap:16px;align-items:flex-start}
.step-num{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--pink));display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;color:#fff;flex-shrink:0}
.step-item h4{font-size:16px;font-weight:700;margin-bottom:4px}
.step-item p{font-size:14px;color:var(--muted)}
.how-visual{display:flex;justify-content:center;align-items:center}
.arrow-demo{display:grid;grid-template-columns:repeat(3,60px);grid-template-rows:repeat(3,60px);gap:6px}
.arrow-key{background:var(--card);border:1.5px solid var(--border);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;transition:all var(--transition);cursor:default}
.arrow-key.active{background:rgba(99,102,241,.2);border-color:var(--primary)}
.arrow-key.center{background:transparent;border:none}

/* DOWNLOAD */
.download-section{background:linear-gradient(135deg,rgba(99,102,241,.12),rgba(236,72,153,.08));border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.store-badges{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:32px}
.badge{display:inline-flex;align-items:center;gap:12px;padding:14px 24px;border-radius:14px;font-weight:600;font-size:15px;transition:all var(--transition);cursor:pointer;border:1.5px solid var(--border);color:var(--text)}
.badge:hover{border-color:var(--primary);background:rgba(99,102,241,.1);transform:translateY(-2px);color:var(--text)}
.badge-icon{font-size:28px}
.badge-sub{font-size:11px;font-weight:400;color:var(--muted);display:block}
.badge-main{font-size:16px;font-weight:700;display:block}

/* FOOTER */
.footer{padding:56px 0 32px;border-top:1px solid var(--border)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-brand p{font-size:14px;color:var(--muted);margin-top:12px;max-width:280px}
.footer-col h4{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:16px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:14px;color:var(--muted);transition:color var(--transition)}
.footer-col ul a:hover{color:var(--text)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding-top:32px;border-top:1px solid var(--border);font-size:13px;color:var(--muted)}
.footer-bottom-links{display:flex;gap:20px}
.footer-bottom-links a{color:var(--muted);font-size:13px}
.footer-bottom-links a:hover{color:var(--text)}

/* INNER PAGES */
.page-header{padding:120px 0 64px;text-align:center;background:radial-gradient(ellipse 80% 50% at 50% -10%,rgba(99,102,241,.2) 0%,transparent 60%)}
.page-header h1{font-size:clamp(32px,5vw,52px);font-weight:800}
.page-header p{font-size:17px;color:var(--muted);margin-top:14px}
.prose{max-width:780px;margin:0 auto;padding:0 0 80px}
.prose h2{font-size:22px;font-weight:700;margin:40px 0 12px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.prose h2:first-child{margin-top:0}
.prose p{font-size:15px;color:var(--muted);margin-bottom:16px;line-height:1.75}
.prose ul,.prose ol{padding-left:20px;color:var(--muted);font-size:15px;line-height:1.75;margin-bottom:16px}
.prose li{margin-bottom:6px}
.prose strong{color:var(--text)}
.prose a{color:var(--primary)}
.prose a:hover{color:var(--pink)}
.prose .highlight{background:rgba(99,102,241,.1);border-left:3px solid var(--primary);padding:14px 18px;border-radius:0 8px 8px 0;margin:20px 0;font-size:14px;color:var(--muted)}
.faq-item{padding:20px 24px;margin-bottom:10px;cursor:pointer;transition:border-color var(--transition)}
.faq-item:hover{border-color:rgba(99,102,241,.3)}
.faq-q{display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:15px}
.faq-q .icon{font-size:18px;transition:transform var(--transition)}
.faq-item.open .icon{transform:rotate(45deg)}
.faq-a{display:none;padding-top:12px;font-size:14px;color:var(--muted);line-height:1.7}
.faq-item.open .faq-a{display:block}
.contact-form{display:flex;flex-direction:column;gap:16px}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-size:13px;font-weight:600;color:var(--muted)}
.form-group input,.form-group textarea,.form-group select{background:var(--card);border:1.5px solid var(--border);border-radius:10px;padding:13px 16px;color:var(--text);font-size:15px;font-family:inherit;transition:border-color var(--transition);resize:vertical}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.15)}
.form-group input::placeholder,.form-group textarea::placeholder{color:var(--muted)}
.form-group select option{background:var(--bg1)}

/* GAME BOARD */
.game-layout{max-width:500px;margin:0 auto;padding:20px}
.game-header-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;gap:10px;flex-wrap:wrap}
.score-box{flex:1;min-width:80px;text-align:center;padding:10px 8px;border-radius:10px}
.score-box .label{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.score-box .value{font-size:22px;font-weight:800}
.game-controls{display:flex;gap:8px;margin-bottom:14px}
.mode-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.mode-tab{padding:7px 14px;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer;border:1.5px solid var(--border);background:transparent;color:var(--muted);transition:all var(--transition)}
.mode-tab.active{background:rgba(99,102,241,.2);border-color:var(--primary);color:var(--text)}
.board-container{position:relative}
.board-wrap{background:#BBaDA0;border-radius:10px;padding:10px;user-select:none;touch-action:none}
#board{display:grid;gap:10px}
.cell{background:rgba(255,255,255,.15);border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:900;transition:transform .1s,background .1s;aspect-ratio:1}
.cell[data-v="0"]{background:rgba(0,0,0,.08)}
.game-btn-row{display:flex;gap:10px;margin-top:14px}
.game-btn{flex:1;padding:12px;border-radius:10px;font-size:14px;font-weight:700;cursor:pointer;border:none;transition:all var(--transition)}
.game-btn-new{background:linear-gradient(135deg,var(--primary),var(--pink));color:#fff}
.game-btn-undo{background:var(--card);color:var(--text);border:1.5px solid var(--border)}
.game-btn:hover{transform:translateY(-2px)}
.game-over-overlay{position:absolute;inset:0;background:rgba(0,0,0,.6);border-radius:10px;display:none;align-items:center;justify-content:center;flex-direction:column;gap:16px;backdrop-filter:blur(4px)}
.game-over-overlay.show{display:flex}
.game-over-overlay h3{font-size:28px;font-weight:800}

/* TILE COLORS */
.t2{background:#EEE4DA;color:#776E65}.t4{background:#EDE0C8;color:#776E65}
.t8{background:#F59E0B;color:#fff}.t16{background:#F97316;color:#fff}
.t32{background:#EF4444;color:#fff}.t64{background:#E11D48;color:#fff}
.t128{background:#EAB308;color:#fff}.t256{background:#10B981;color:#fff}
.t512{background:#06B6D4;color:#fff}.t1024{background:#3B82F6;color:#fff}
.t2048{background:#8B5CF6;color:#fff}.t4096{background:#EC4899;color:#fff}
.t8192{background:#6366F1;color:#fff}.tbig{background:#1E1B4B;color:#fff}

/* RESPONSIVE */
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr;text-align:center;gap:40px}
  .hero p{max-width:100%}.hero-actions{justify-content:center}.hero-stats{justify-content:center}
  .hero-visual{order:-1}.phone-wrap,.phone-frame{width:220px}.phone-frame::before{width:60px;height:14px;top:10px}.floating-tile{display:none}
  .how-grid{grid-template-columns:1fr}.how-visual{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .nav-links,.nav-cta{display:none}.hamburger{display:flex}.section{padding:64px 0}
  .footer-grid{grid-template-columns:1fr}.hero{min-height:auto;padding:100px 0 60px}
  .nav-links.open{display:flex;flex-direction:column;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(15,23,42,.97);justify-content:center;align-items:center;gap:20px;z-index:998;font-size:20px}
  .nav-links.open a{font-size:20px}
}
.scroll-top{position:fixed;bottom:28px;right:28px;width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--pink));border:none;color:#fff;font-size:20px;cursor:pointer;display:none;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(99,102,241,.4);z-index:900;transition:transform var(--transition)}
.scroll-top.show{display:flex}.scroll-top:hover{transform:translateY(-3px)}
.slide-up{opacity:0;transform:translateY(30px);transition:opacity .6s,transform .6s}
.slide-up.visible{opacity:1;transform:none}
/* ── GAME FIX: ensure board renders correctly ── */
.board-wrap {
  background: #BBaDA0;
  border-radius: 10px;
  padding: 10px;
  user-select: none;
  touch-action: none;
  width: 100%;
  box-sizing: border-box;
}
#board {
  display: grid;
  gap: 10px;
  width: 100%;
}
.cell {
  background: rgba(0,0,0,.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-family: "Inter", sans-serif;
  width: 100%;
  aspect-ratio: 1 / 1;
  transition: background .1s;
  color: #fff;
  line-height: 1;
}
.cell[data-v="0"] { background: rgba(0,0,0,.08); }
.t2    { background:#EEE4DA; color:#776E65; }
.t4    { background:#EDE0C8; color:#776E65; }
.t8    { background:#F59E0B; color:#fff; }
.t16   { background:#F97316; color:#fff; }
.t32   { background:#EF4444; color:#fff; }
.t64   { background:#E11D48; color:#fff; }
.t128  { background:#EAB308; color:#fff; }
.t256  { background:#10B981; color:#fff; }
.t512  { background:#06B6D4; color:#fff; }
.t1024 { background:#3B82F6; color:#fff; }
.t2048 { background:#8B5CF6; color:#fff; }
.t4096 { background:#EC4899; color:#fff; }
.t8192 { background:#6366F1; color:#fff; }
.tbig  { background:#1E1B4B; color:#fff; }
.board-container { position: relative; width: 100%; }
.game-over-overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,.7);
  border-radius: 10px;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 14px;
  backdrop-filter: blur(6px);
  z-index: 10;
}
.game-over-overlay.show { display: flex; }
.game-over-overlay h3 { font-size: 26px; font-weight: 900; color: #F8FAFC; }
.game-layout { max-width: 480px; margin: 0 auto; padding: 20px; }
.game-header-bar {
  display: flex; gap: 10px; margin-bottom: 12px;
}
.score-box {
  flex: 1; text-align: center; padding: 10px 8px; border-radius: 10px;
}
.score-box .label {
  font-size: 10px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .08em; color: #94A3B8; display: block; margin-bottom: 2px;
}
.score-box .value { font-size: 22px; font-weight: 800; color: #F8FAFC; }
.game-btn-row { display: flex; gap: 10px; margin-bottom: 12px; }
.game-btn {
  flex: 1; padding: 13px; border-radius: 10px;
  font-size: 14px; font-weight: 700; cursor: pointer;
  border: none; font-family: "Inter", sans-serif;
  transition: transform .2s, opacity .2s;
}
.game-btn:hover { transform: translateY(-2px); }
.game-btn-new { background: linear-gradient(135deg,#6366F1,#EC4899); color:#fff; }
.game-btn-undo { background: rgba(255,255,255,.06); color:#F8FAFC; border: 1.5px solid rgba(255,255,255,.10); }
.mode-tabs { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.mode-tab {
  padding: 8px 16px; border-radius: 8px; font-size: 13px;
  font-weight: 600; cursor: pointer; font-family: "Inter",sans-serif;
  border: 1.5px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04); color: #94A3B8;
  transition: all .2s;
}
.mode-tab.active {
  background: rgba(99,102,241,.2);
  border-color: #6366F1; color: #F8FAFC;
}

/* ── Arrow control buttons ── */
.arrow-controls {
  display: grid;
  grid-template-columns: repeat(3, 52px);
  grid-template-rows: repeat(3, 52px);
  gap: 6px;
  margin: 16px auto 0;
  width: fit-content;
}
.arrow-btn {
  width: 52px; height: 52px;
  border-radius: 10px;
  background: rgba(255,255,255,.07);
  border: 1.5px solid rgba(255,255,255,.12);
  color: #F8FAFC;
  font-size: 22px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all .15s;
  font-family: inherit;
  user-select: none;
}
.arrow-btn:hover  { background: rgba(99,102,241,.25); border-color: #6366F1; transform: scale(1.08); }
.arrow-btn:active { transform: scale(.95); background: rgba(99,102,241,.4); }
.arrow-btn.empty  { background: transparent; border: none; cursor: default; pointer-events: none; }