/* Base */
:root{
  --bg1:#ff0080;
  --bg2:#7928ca;
  --bg3:#2af598;
  --text:#ffffff;
  --accent:#ffe600;
  --glass: rgba(255,255,255,0.12);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: "Poppins", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(135deg,var(--bg1),var(--bg2),var(--bg3));
  background-size: 400% 400%;
  animation: gradientBG 10s ease infinite;
}

/* Header */
.site-header{
  text-align:center;
  padding:28px 16px 12px;
  position:sticky;
  top:0;
  z-index:10;
  backdrop-filter: blur(10px);
  background: linear-gradient(180deg, rgba(0,0,0,0.35), rgba(0,0,0,0));
}
h1{
  margin:0 0 6px;
  font-size: clamp(24px, 3.4vw, 40px);
  text-shadow: 0 0 18px rgba(0,0,0,0.35);
  animation: glow 2s infinite alternate;
}
.tagline{
  margin:0 0 16px;
  opacity:.9;
  font-size:.98rem;
}

.controls{
  max-width: 980px;
  margin: 0 auto 10px;
  padding: 0 10px 12px;
}
#search{
  width: 100%;
  max-width: 720px;
  padding: 12px 16px;
  border: none;
  border-radius: 28px;
  outline: none;
  font-size: 1rem;
  box-shadow: 0 6px 18px rgba(0,0,0,0.25);
}
.chips{
  margin-top:10px;
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  justify-content:center;
}
.chip{
  border:none;
  padding:8px 14px;
  border-radius:20px;
  background: var(--glass);
  color:#fff;
  cursor:pointer;
  transition:.2s;
  backdrop-filter: blur(6px);
}
.chip:hover{transform: translateY(-1px); background: rgba(255,255,255,0.2)}
.chip.active{background:#fff;color:#111;font-weight:600}
.chip.clear{background:rgba(0,0,0,0.35)}

/* Library */
#library{
  max-width: 1100px;
  margin: 10px auto 60px;
  padding: 0 16px;
}
.group{
  margin: 14px 0;
  border-radius: 16px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(255,255,255,.09), rgba(255,255,255,.05));
  box-shadow: 0 8px 28px rgba(0,0,0,.25);
}

/* Accordion button */
.accordion{
  width:100%;
  text-align:left;
  padding:16px 18px;
  font-size:1.1rem;
  font-weight:700;
  background: transparent;
  color:#fff;
  border:none;
  outline:none;
  cursor:pointer;
  position:relative;
}
.accordion::after{
  content:"+";
  position:absolute;
  right:18px;
  top:50%;
  transform: translateY(-50%);
  font-weight:900;
}
.accordion.active::after{content:"–"}

.panel{
  max-height:0;
  overflow:hidden;
  transition: max-height .35s ease;
  margin:0;
  padding:0 0 0 0;
  list-style:none;
}

/* Items */
.panel li{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 18px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.panel li a{
  color:#fff;
  text-decoration:none;
  font-weight:600;
  display:inline-block;
  padding:8px 12px;
  border-radius:10px;
  transition: .2s;
}
.panel li a:hover{
  background: rgba(255,255,255,0.18);
  color:#111;
}

/* Back to top */
#toTop{
  position: fixed;
  right: 16px;
  bottom: 16px;
  padding: 10px 12px;
  border:none;
  border-radius: 999px;
  background: rgba(255,255,255,0.85);
  color:#111;
  font-weight:900;
  cursor:pointer;
  opacity:0;
  transform: translateY(10px);
  pointer-events:none;
  transition: .25s;
  box-shadow: 0 10px 25px rgba(0,0,0,0.35);
}
#toTop.show{opacity:1; transform: translateY(0); pointer-events:auto}

/* Footer */
.site-footer{
  text-align:center;
  padding: 24px 12px 34px;
  background: linear-gradient(180deg, rgba(0,0,0,0), rgba(0,0,0,0.35));
  font-size:.95rem;
}

/* Animations */
@keyframes gradientBG{
  0%{background-position:0% 50%}
  50%{background-position:100% 50%}
  100%{background-position:0% 50%}
}
@keyframes glow{
  from{ text-shadow: 0 0 12px #ff77ff, 0 0 20px #ff0077 }
  to{   text-shadow: 0 0 26px #00ffcc, 0 0 48px #ff0077 }
}

/* Responsive tweaks */
@media (max-width:560px){
  .panel li{padding:12px}
  .accordion{padding:14px}
}