:root{
  --bg1: #0f2027;
  --bg2: #2c5364;
  --accent1: #00c9ff;
  --accent2: #92fe9d;
  --glass: rgba(255,255,255,0.06);
  --muted: #cfcfcf;
  --white: #ffffff;
  --pad-size: clamp(120px, 20vmin, 220px);
}

body {
  min-height: 100vh;
  margin: 0;
  font-family: 'Poppins', system-ui, -apple-system, sans-serif;

  background: radial-gradient(
    circle at top left,
    #0e1a25,
    #142b38 40%,
    #0a1924 100%
  );
  background-size: 200% 200%;
  animation: bgShift 18s ease-in-out infinite;

  color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}


.board-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.08);
}


@keyframes bgShift {
  0%{background-position:0% 50%;}
  50%{background-position:100% 50%;}
  100%{background-position:0% 50%;}
}  

.siteHeader{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:18px 28px;
  gap:16px;
  position:sticky;
  top:0;
  z-index:5;
  backdrop-filter: blur(6px);
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  box-shadow:0 6px 18px rgba(0,0,0,0.25);
}

.brand .title{
  font-family: 'Audiowide', sans-serif;
  font-size: clamp(20px, 3.2vw, 32px);
  margin:0;
  letter-spacing:2px;
  display:flex;
  gap: 7px; 
  align-items:center;
}
.brand .title span{
  color:var(--accent2);
  text-shadow: 0 0 10px rgba(146,254,157,0.18);
}
.brand .tag{
  margin:4px 3px 2px 3px;
  font-size:12px;
  color:rgba(255,255,255,0.78);
}

.top-controls{
  display:flex;
  gap:14px;
  align-items:center;
}

.scoreboard{
  display:flex;
  gap:12px;
}
.score-block{
  background:linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  padding:8px 12px;
  border-radius:10px;
  text-align:center;
  min-width:64px;
}
.score-block .label{
  font-size:15px;
  color:#d92250;
}
.score-block .value{
  font-weight:600;
  font-size:18px;
  color:var(--white);
}

.btn{
  border:0;
  padding:8px 14px;
  border-radius:10px;
  font-weight:600;
  cursor:pointer;
  font-size:14px;
  transition: transform .12s ease, box-shadow .12s ease;
  box-shadow: 0 6px 18px rgba(0,0,0,0.25);
}
.btn:active{ transform: translateY(1px) scale(.995); }

.btn.action{
  background: linear-gradient(90deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  color:var(--white);
  border: 1px solid rgba(255,255,255,0.06);
}


.main{
  display:grid;
  grid-template-columns: 1fr 320px;
  gap:28px;
  max-width:1200px;
  margin:36px auto;
  padding:0 20px;
  align-items:start;
}


.board-card{
  background: var(--glass);
  border-radius:18px;
  padding:28px;
  display:flex;
  gap:24px;
  align-items:center;
  justify-content:center;
  min-height: min(68vh, 520px);
  box-shadow: 0 10px 40px rgba(2,6,23,0.45), inset 0 1px 0 rgba(255,255,255,0.02);
  position:relative;
  overflow:hidden;
  border: 1px solid rgba(255,255,255,0.04);
}


.board-grid{
  width: clamp(260px, 52vmin, 560px);
  height: clamp(260px, 52vmin, 560px);
  display:grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap:18px;
  place-items:center;
}

.pad{
  width:100%;
  height:100%;
  aspect-ratio:1/1;
  border-radius:18px;
  border: 6px solid rgba(255,255,255,0.04);
  transition: transform .12s ease, box-shadow .12s ease, filter .12s ease;
  cursor:pointer;
  background:linear-gradient(180deg, rgba(255,255,255,0.03), rgba(0,0,0,0.07));
  box-shadow: 0 12px 30px rgba(2,6,23,0.45);
}


.pad-top-left{
  background: linear-gradient(180deg, #28e07c 0%, #1a9b58 100%);
  box-shadow: 0 8px 30px rgba(40,224,124,0.18), inset 0 -6px 20px rgba(0,0,0,0.18);
}
.pad-top-right{
  background: linear-gradient(180deg, #ff416c 0%, #d92250 100%);
  box-shadow: 0 8px 30px rgba(255,65,108,0.14), inset 0 -6px 20px rgba(0,0,0,0.18);
}
.pad-bottom-left{
  background: linear-gradient(180deg, #ffd54f 0%, #dfa012 100%);
  box-shadow: 0 8px 30px rgba(255,213,79,0.14), inset 0 -6px 20px rgba(0,0,0,0.18);
}
.pad-bottom-right{
  background: linear-gradient(180deg, #00b4ff 0%, #0078b3 100%);
  box-shadow: 0 8px 30px rgba(0,180,255,0.14), inset 0 -6px 20px rgba(0,0,0,0.18);
}


.pad:hover, .pad:focus{
  transform: translateY(-6px) scale(1.02);
  filter:brightness(1.06);
  outline: none;
}

.center-hub{
  position:absolute;
  width:180px;
  height:180px;
  border-radius:50%;
  left:50%;
  top:50%;
  transform:translate(-50%,-50%);
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  display:flex;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  text-align:center;
  box-shadow: 0 12px 30px rgba(0,0,0,0.4);
  border:1px solid rgba(255,255,255,0.03);
}
.hub-display{
  font-family: 'Audiowide', sans-serif;
  color: var(--accent2);
  font-size:22px;
  text-shadow: 0 0 12px rgba(146,254,157,0.18);
}
.hub-note{
  margin-top:8px;
  font-size:11px;
  color:rgba(255,255,255,0.78);
}

.panel{
  display:flex;
  flex-direction:column;
  gap:18px;
}
.card{
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  border-radius:14px;
  padding:16px;
  border:1px solid rgba(255,255,255,0.04);
}
.card-title{
  font-family: 'Audiowide', sans-serif;
  font-size:14px;
  margin:0 0 8px 0;
  color:orange;
}

.instruction-list{
  margin:6px 0 0 20px;
  color:rgba(255,255,255,0.92);
  line-height:1.5;
  font-size:14px;
}

.small{
  font-size:12px;
  color:rgba(255,255,255,0.7);
  margin-top:10px;
}

.site-footer{
  text-align:center;
  color:rgba(255,255,255,0.7);
  padding:18px 0 40px;
  font-size:13px;
}

@media (max-width:980px){
  .main{ grid-template-columns:1fr; padding-bottom:36px; }
  .panel{ order:2; }
  .board-card{ min-height:60vh; }
  .center-hub{ width:140px; height:140px; }
}

.card.tips {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  border-left: 3px solid var(--accent2); 
  box-shadow: 0 8px 24px rgba(0, 255, 128, 0.15);
}

.card.tips .card-title {
  color: orange;
}

.card.tips ul {
  margin: 8px 0 0 20px;
  padding: 0;
  list-style: "⭐ ";
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.9);
}

.card.tips li {
  margin-bottom: 6px;
  transition: transform 0.15s ease, color 0.15s ease;
}

.card.tips li:hover {
  transform: translateX(4px);
  color: var(--accent1); 
}

.pad.active {
  filter: brightness(1.4);
  transform: scale(1.05);
  box-shadow: 0 0 30px rgba(255,255,255,0.5);
}

.bg-orbs {
  position: fixed;
  inset: 0;
  overflow: hidden;
  z-index: -1;
}

.bg-orbs span {
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.25;
  animation: orbFloat 30s linear infinite;
}

.bg-orbs span:nth-child(1) {
  background: #00c9ff;
  top: 10%;
  left: 15%;
  animation-duration: 38s;
}

.bg-orbs span:nth-child(2) {
  background: #92fe9d;
  bottom: 15%;
  right: 20%;
  animation-duration: 42s;
}

.bg-orbs span:nth-child(3) {
  background: #ff416c;
  top: 50%;
  right: 40%;
  animation-duration: 46s;
}

@keyframes orbFloat {
  0% {
    transform: translateY(0) translateX(0);
  }
  50% {
    transform: translateY(-60px) translateX(40px);
  }
  100% {
    transform: translateY(0) translateX(0);
  }
}
@media (prefers-reduced-motion: reduce) {
  body {
    animation: none;
  }
  .bg-orbs span {
    animation: none;
  }
}