/* =====================================================
   sandspiel.io — kid-friendly gaming theme
   base color: #101720
   ===================================================== */
:root{
  --bg:      #101720;
  --bg2:     #182234;
  --panel:   #1c2940;
  --panel2:  #223350;
  --line:    rgba(255,255,255,.09);
  --txt:     #eef3ff;
  --sub:     #9daccb;
  --yellow:  #ffd23f;
  --coral:   #ff5e78;
  --cyan:    #3fd8ff;
  --lime:    #8aff5e;
  --purple:  #b76bff;
  --orange:  #ff9f43;
  --pink:    #ff6bcb;
  --r:       22px;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--txt);
  font-family:'Fredoka','Segoe UI',system-ui,sans-serif;
  line-height:1.65;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1150px;margin:0 auto;padding:0 20px}

/* =====================================================
   HEADER
   ===================================================== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(16,23,32,.92);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:2px solid var(--line);
}
.header-in{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 20px;max-width:1150px;margin:0 auto;
}
.logo{
  display:flex;align-items:center;gap:10px;
  font-weight:700;font-size:1.5rem;color:var(--txt);
  text-decoration:none !important;
}
.logo img{width:38px;height:38px;transition:transform .3s}
.logo:hover img{transform:rotate(-10deg) scale(1.1)}
.logo b{
  background:linear-gradient(90deg,var(--yellow),var(--coral),var(--cyan));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
#nav-menu{display:flex;gap:6px;list-style:none;align-items:center}
#nav-menu a{
  color:var(--txt);font-weight:600;font-size:.98rem;
  padding:8px 14px;border-radius:999px;transition:background .15s;
  text-decoration:none;
}
#nav-menu a:hover{background:var(--panel2);color:var(--yellow)}
#nav-menu a.btn-play{
  background:linear-gradient(135deg,var(--coral),var(--orange));
  color:#fff;box-shadow:0 4px 14px rgba(255,94,120,.4);
}
#nav-menu a.btn-play:hover{filter:brightness(1.1);color:#fff}
#nav-toggle{
  display:none;background:none;border:0;cursor:pointer;padding:8px;
}
#nav-toggle span{
  display:block;width:26px;height:3px;border-radius:3px;
  background:var(--yellow);margin:5px 0;transition:transform .25s,opacity .25s;
}
#nav-toggle.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
#nav-toggle.open span:nth-child(2){opacity:0}
#nav-toggle.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

@media (max-width:820px){
  #nav-toggle{display:block}
  #nav-menu{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:2px;
    background:#141d2d;border-bottom:2px solid var(--line);
    padding:10px 16px 16px;display:none;
  }
  #nav-menu.open{display:flex}
  #nav-menu a{padding:12px 14px;border-radius:12px;text-align:center}
}

/* =====================================================
   HERO + GAME
   ===================================================== */
.hero{
  text-align:center;
  padding:34px 20px 10px;
  background:
    radial-gradient(700px 300px at 20% 0%, rgba(63,216,255,.12), transparent 60%),
    radial-gradient(700px 300px at 80% 0%, rgba(255,107,203,.12), transparent 60%);
}
.hero h1{
  font-size:clamp(1.7rem, 4.5vw, 2.8rem);
  font-weight:700;letter-spacing:.01em;
}
.hero h1 .grad{
  background:linear-gradient(90deg,var(--yellow),var(--coral),var(--purple),var(--cyan));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero p{color:var(--sub);max-width:640px;margin:8px auto 0;font-size:1.05rem}

#gamewrap{
  position:relative;
  max-width:1000px;margin:22px auto 0;
  border-radius:var(--r);overflow:hidden;
  border:3px solid var(--panel2);
  box-shadow:0 24px 70px rgba(0,0,0,.55), 0 0 0 6px rgba(63,216,255,.06);
  display:flex;flex-direction:column;
  background:#0c1220;
}
#gamewrap.pseudo-full{
  position:fixed;inset:0;z-index:999;max-width:none;margin:0;border-radius:0;border:0;
}
#gamewrap:fullscreen{width:100vw;height:100vh}
#stage{
  position:relative;flex:none;overflow:hidden;cursor:crosshair;
  height:min(62vh,560px);
  background:linear-gradient(180deg,#101528 0%,#0a0d18 100%);
  touch-action:none;
}
#gamewrap.pseudo-full #stage, #gamewrap:fullscreen #stage{flex:1;height:auto;min-height:0}
#stage canvas{
  position:absolute;inset:0;width:100%;height:100%;
  display:block;image-rendering:pixelated;
}
#glow{pointer-events:none;mix-blend-mode:screen}
#cursor{
  position:absolute;border:1.5px solid rgba(255,255,255,.65);border-radius:50%;
  pointer-events:none;transform:translate(-50%,-50%);display:none;z-index:5;
  box-shadow:0 0 8px rgba(0,0,0,.6);
}
/* play overlay */
#play-overlay{
  position:absolute;inset:0;z-index:10;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:rgba(10,14,24,.55);backdrop-filter:blur(3px);
  transition:opacity .3s;
}
#play-overlay.hidden{opacity:0;pointer-events:none}
#play-btn{
  font-family:inherit;font-weight:700;font-size:1.5rem;letter-spacing:.05em;
  color:#fff;border:0;cursor:pointer;
  padding:18px 54px;border-radius:999px;
  background:linear-gradient(135deg,var(--coral),var(--orange));
  box-shadow:0 10px 34px rgba(255,94,120,.55), inset 0 -4px 0 rgba(0,0,0,.2);
  animation:pulse 1.6s infinite;
}
@keyframes pulse{
  0%,100%{transform:scale(1)}
  50%{transform:scale(1.07)}
}
#play-btn:active{transform:scale(.96)}
#play-overlay .hint-txt{color:#cfe0ff;font-size:.95rem;text-shadow:0 1px 6px #000}
/* game toolbar */
#gamebar{
  flex:none;display:flex;flex-direction:column;gap:7px;
  background:rgba(14,19,32,.95);border-top:2px solid var(--line);
  padding:9px 10px calc(9px + env(safe-area-inset-bottom,0px));
}
#picker{
  display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
#picker::-webkit-scrollbar{display:none}
.el{
  flex:none;display:flex;align-items:center;gap:7px;padding:8px 13px;border-radius:11px;
  background:rgba(255,255,255,.05);border:1px solid transparent;color:var(--txt);
  font-family:inherit;font-size:.85rem;font-weight:600;cursor:pointer;
  transition:background .15s,border-color .15s;
}
.el:hover{background:rgba(255,255,255,.12)}
.el.active{
  border-color:var(--chip,#fff);background:rgba(255,255,255,.10);
  box-shadow:0 0 14px color-mix(in srgb, var(--chip) 45%, transparent);
}
.dot{width:12px;height:12px;border-radius:4px;background:var(--chip);
  box-shadow:0 0 8px color-mix(in srgb, var(--chip) 70%, transparent)}
#gctrl{
  display:flex;gap:8px;align-items:center;justify-content:center;flex-wrap:wrap;
  font-size:.8rem;color:var(--sub);
}
#gctrl button{
  font-family:inherit;background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);color:var(--txt);
  padding:7px 13px;border-radius:9px;font-size:.85rem;font-weight:600;cursor:pointer;
}
#gctrl button:hover{background:rgba(255,255,255,.15)}
#gctrl input[type=range]{accent-color:var(--cyan);width:110px}
#exit-fs{display:none}
#gamewrap.is-full #exit-fs{display:inline-block}
@media (min-width:760px){
  #gamebar{flex-direction:row;align-items:center;justify-content:center;gap:14px}
  #picker{max-width:60%}
}

/* =====================================================
   SECTIONS
   ===================================================== */
section{padding:56px 0}
.sec-title{
  text-align:center;font-size:clamp(1.5rem,3.4vw,2.2rem);font-weight:700;margin-bottom:8px;
}
.sec-title .emoji{margin-right:8px}
.sec-sub{text-align:center;color:var(--sub);max-width:680px;margin:0 auto 34px}
.stripe{background:var(--bg2)}

/* about cards */
.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.kcard{
  background:var(--panel);border:2px solid var(--line);border-radius:var(--r);
  padding:26px 22px;text-align:center;
  transition:transform .2s, box-shadow .2s, border-color .2s;
}
.kcard:hover{transform:translateY(-6px) rotate(-.5deg);border-color:var(--kc,var(--cyan));
  box-shadow:0 16px 40px rgba(0,0,0,.4)}
.kcard .big{font-size:2.4rem;line-height:1;margin-bottom:10px;display:block}
.kcard h3{font-size:1.15rem;margin-bottom:6px;color:var(--kc,var(--cyan))}
.kcard p{color:var(--sub);font-size:.95rem}

/* how-to steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
.step{
  background:var(--panel);border:2px solid var(--line);border-radius:var(--r);
  padding:24px 18px;position:relative;text-align:center;
  transition:transform .2s;
}
.step:hover{transform:translateY(-5px)}
.step .num{
  width:44px;height:44px;border-radius:50%;margin:0 auto 12px;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:1.2rem;color:#101720;
  background:linear-gradient(135deg,var(--yellow),var(--orange));
  box-shadow:0 6px 16px rgba(255,210,63,.35);
}
.step h3{font-size:1.05rem;margin-bottom:6px}
.step p{color:var(--sub);font-size:.92rem}

/* elements grid */
.chips{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.chip{
  display:flex;align-items:center;gap:9px;
  background:var(--panel);border:2px solid var(--line);border-radius:999px;
  padding:10px 20px;font-weight:600;
  transition:transform .15s,border-color .15s;
}
.chip:hover{transform:scale(1.08) rotate(1deg);border-color:var(--cc)}
.chip i{width:16px;height:16px;border-radius:5px;background:var(--cc);
  box-shadow:0 0 10px var(--cc)}

/* =====================================================
   FEATURES / POSTS
   ===================================================== */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{
  background:var(--panel);border:2px solid var(--line);border-radius:var(--r);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s, box-shadow .2s, border-color .2s;
}
.post-card:hover{transform:translateY(-7px);border-color:var(--cyan);
  box-shadow:0 18px 44px rgba(0,0,0,.45)}
.post-card img{width:100%;height:170px;object-fit:cover}
.post-body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
.post-body h3{font-size:1.08rem;margin-bottom:8px;line-height:1.35}
.post-body p{color:var(--sub);font-size:.93rem;flex:1}
.read-more{
  margin-top:14px;align-self:flex-start;
  background:linear-gradient(135deg,var(--cyan),var(--purple));
  color:#fff !important;font-weight:700;font-size:.9rem;
  padding:9px 20px;border-radius:999px;text-decoration:none !important;
  box-shadow:0 6px 18px rgba(63,216,255,.3);
  transition:filter .15s, transform .15s;
}
.read-more:hover{filter:brightness(1.15);transform:scale(1.04)}

/* =====================================================
   FAQ
   ===================================================== */
.faq-list{max-width:760px;margin:0 auto}
.faq-item{
  background:var(--panel);border:2px solid var(--line);border-radius:18px;
  margin-bottom:12px;overflow:hidden;transition:border-color .2s;
}
.faq-item.open{border-color:var(--yellow)}
.faq-q{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:12px;
  background:none;border:0;cursor:pointer;color:var(--txt);
  font-family:inherit;font-size:1.02rem;font-weight:600;text-align:left;
  padding:16px 20px;
}
.faq-q .arrow{
  flex:none;width:26px;height:26px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--panel2);color:var(--yellow);font-size:.9rem;
  transition:transform .25s;
}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .3s ease;
  color:var(--sub);font-size:.97rem;padding:0 20px;
}
.faq-item.open .faq-a{max-height:300px;padding:0 20px 18px}

/* =====================================================
   FOOTER  (like the reference: brand + link columns)
   ===================================================== */
.site-footer{
  background:#0b111a;border-top:2px solid var(--line);
  padding:54px 0 0;margin-top:30px;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;
  padding-bottom:40px;border-bottom:1px solid var(--line);
}
.f-brand .logo{font-size:1.35rem;margin-bottom:12px}
.f-brand p{color:var(--sub);font-size:.95rem;max-width:300px}
.site-footer h4{font-size:1.05rem;margin-bottom:14px;color:var(--yellow)}
.site-footer ul{list-style:none}
.site-footer ul li{margin-bottom:10px}
.site-footer ul a{color:var(--sub);text-decoration:none;font-size:.97rem}
.site-footer ul a:hover{color:var(--cyan)}
.copyright{
  text-align:center;color:var(--sub);font-size:.93rem;padding:20px 0 24px;
}
.copyright a{color:var(--coral);font-weight:600}
@media (max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
}

/* =====================================================
   POST / INFO PAGES
   ===================================================== */
.page-head{
  text-align:center;padding:46px 20px 8px;
  background:
    radial-gradient(600px 260px at 30% 0%, rgba(255,210,63,.10), transparent 60%),
    radial-gradient(600px 260px at 70% 0%, rgba(183,107,255,.10), transparent 60%);
}
.page-head h1{font-size:clamp(1.6rem,4vw,2.4rem);max-width:820px;margin:0 auto}
.page-head .meta-line{color:var(--sub);font-size:.92rem;margin-top:10px}
article.post{
  max-width:780px;margin:30px auto 60px;padding:0 20px;
}
article.post .cover{
  border-radius:var(--r);border:2px solid var(--line);margin-bottom:28px;
  width:100%;object-fit:cover;max-height:420px;
}
article.post h2{margin:30px 0 10px;font-size:1.4rem;color:var(--yellow)}
article.post p{margin-bottom:16px;color:#cdd8ee}
article.post ul{margin:0 0 16px 22px;color:#cdd8ee}
article.post li{margin-bottom:6px}
.back-row{max-width:780px;margin:0 auto 60px;padding:0 20px}
.btn-back{
  display:inline-block;background:var(--panel);border:2px solid var(--line);
  color:var(--txt) !important;font-weight:600;padding:10px 22px;border-radius:999px;
  text-decoration:none !important;
}
.btn-back:hover{border-color:var(--cyan)}

/* responsive grids */
@media (max-width:900px){
  .cards3{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .posts{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:560px){
  .steps{grid-template-columns:1fr}
  .posts{grid-template-columns:1fr}
  section{padding:42px 0}
}

/* Pixel-game scroll-to-top control */
.scroll-to-top{
  position:fixed;right:clamp(16px,3vw,32px);bottom:clamp(16px,3vw,30px);
  z-index:900;display:grid;place-items:center;width:58px;height:58px;
  padding:7px;border:2px solid var(--yellow);border-radius:14px;
  background:linear-gradient(145deg,#202d42,#101720);color:var(--yellow);
  box-shadow:0 6px 0 #080d14,0 12px 28px rgba(0,0,0,.4);
  font:700 .66rem/1 Fredoka,sans-serif;letter-spacing:.08em;
  cursor:pointer;opacity:0;visibility:hidden;
  transform:translateY(18px) scale(.9);
  transition:opacity .2s ease,transform .2s ease,visibility .2s;
}
.scroll-to-top::before{
  content:"";position:absolute;inset:5px;border:1px dashed rgba(255,210,63,.4);
  border-radius:9px;pointer-events:none;
}
.scroll-to-top.is-visible{
  opacity:1;visibility:visible;transform:translateY(0) scale(1);
}
.scroll-to-top:hover{
  color:#101720;background:var(--yellow);transform:translateY(-3px);
}
.scroll-to-top:focus-visible{outline:3px solid var(--cyan);outline-offset:4px}
.scroll-to-top__arrow{font-size:1rem;line-height:.8}
.scroll-to-top__label{display:block}
@media (prefers-reduced-motion:reduce){
  .scroll-to-top{transition:none}
}