:root{
  --bg: #0b1020;
  --card: #151a2c;
  --accent: #ffd700;
  --accent2: #7daea3;
  --text: #f5f7fa;
  --muted: #7e8ba3;
  --radius: 18px;
  --gap: 22px;
  --max-width: 1100px;
  --shadow: 0 8px 32px 0 rgba(31,38,135,0.37);
  --glass: rgba(17, 20, 33, 0.7);
}

/* Theme overrides (set via data-theme attr on <html>) */
html[data-theme="light"]{
  --bg: #f5f7fa;
  --card: #e3e9f0;
  --accent: #7daea3;
  --text: #1a1a1a;
  --muted: #5a5a5a;
  --glass: rgba(255,255,255,0.7);
}
html[data-theme="green"]{
  --bg: #233d1e;
  --card: #1b2f18;
  --accent: #a3c586;
  --text: #eaf7e1;
  --muted: #b5cfb0;
  --glass: rgba(35,61,30,0.7);
}

*{box-sizing:border-box}
body{
  margin:0;
  min-height:100vh;
  background:linear-gradient(120deg,var(--bg) 0%, #09111a 100%);
  color:var(--text);
  font-family: 'Inter', 'Roboto', sans-serif;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:24px;
  transition: background 0.5s;
  background-attachment: fixed;
}

/* App grid */
.app-grid{
  width:100%;
  max-width:var(--max-width);
  display:grid;
  gap:var(--gap);
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto;
}

/* header */
.site-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:18px 24px;
  background:var(--glass);
  border-radius:var(--radius);
  box-shadow: var(--shadow);
  border:1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(8px);
  transition: background 0.4s;
}
.brand h1{
  margin:0;
  font-size:1.5rem;
  letter-spacing:2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.brand small{color:var(--muted);font-size:0.95em}

.header-controls{display:flex;align-items:center;gap:12px}
.font-wrap select{
  padding:7px 12px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,0.10);
  background:var(--glass);
  color:var(--text);
  font-weight:500;
  box-shadow:0 2px 8px rgba(2,6,23,0.08);
  transition: background 0.3s;
}

/* main player card */
.player-card{
  background:var(--glass);
  border-radius:var(--radius);
  padding:28px 24px;
  box-shadow: var(--shadow);
  border:1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(12px);
  transition: background 0.4s;
  position:relative;
  overflow:hidden;
}
.player-card::before{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(circle at 80% 20%, var(--accent) 0%, transparent 60%);
  opacity:0.08;
  pointer-events:none;
}

/* player grid */
.player-grid{
  display:grid;
  grid-template-columns: 220px 1fr;
  gap:28px;
  align-items:center;
}

/* cover */
.cover{
  border-radius:14px;
  overflow:hidden;
  height:220px;
  box-shadow:0 8px 32px rgba(0,0,0,0.25);
  border:2px solid var(--accent);
  background:linear-gradient(135deg, var(--accent) 0%, transparent 100%);
  transition: border 0.3s;
}
.cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  filter: saturate(1.1) contrast(1.05);
  transition: filter 0.3s;
}

/* controls */
.player-controls .buttons{
  display:flex;
  gap:12px;
  margin-top:16px;
}
.btn{
  padding:12px 18px;
  border-radius:12px;
  border:none;
  background:linear-gradient(90deg, var(--accent), var(--accent2));
  color:var(--bg);
  cursor:pointer;
  box-shadow:0 6px 18px rgba(2,6,23,0.25);
  font-weight:600;
  font-size:1.1em;
  transition: transform 0.1s, box-shadow 0.2s;
}
.btn:active{transform:scale(0.97)}
#themeBtn{
  background:transparent;
  border:1.5px solid var(--accent);
  color:var(--accent);
  box-shadow:none;
  padding:10px 14px;
  transition: border 0.2s, color 0.2s;
}
#themeBtn:hover{
  background:var(--accent);
  color:var(--bg);
}

/* progress */
.progress-row{
  display:flex;
  align-items:center;
  gap:10px;
  margin-top:18px;
}
.progress-row input[type="range"]{
  flex:1;
  accent-color: var(--accent);
  height:4px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius:4px;
  outline:none;
}

/* settings aside */
.settings{
  padding:18px;
  border-radius:var(--radius);
  background:var(--glass);
  display:flex;
  flex-direction:column;
  gap:12px;
  border:1px solid rgba(255,255,255,0.08);
  box-shadow:0 2px 12px rgba(2,6,23,0.10);
  backdrop-filter: blur(8px);
  transition: background 0.4s;
}
.settings input[type="text"]{
  padding:10px;
  border-radius:8px;
  border:1px solid rgba(255,255,255,0.10);
  background:rgba(255,255,255,0.03);
  color:var(--text);
  font-size:1em;
}
.theme-buttons{
  display:flex;
  gap:10px;
  margin-top:8px;
}
.theme-btn{
  padding:9px 14px;
  border-radius:8px;
  border:1.5px solid var(--accent2);
  cursor:pointer;
  background:linear-gradient(90deg, transparent, var(--accent2) 80%);
  color:var(--text);
  font-weight:500;
  transition: background 0.2s, color 0.2s;
}
.theme-btn:hover{
  background:var(--accent2);
  color:var(--bg);
}

/* footer */
.site-footer{
  display:flex;
  justify-content:center;
  padding:10px;
  color:var(--muted);
  font-size:1.05em;
  letter-spacing:1px;
}

/* Responsive: tablet */
@media (max-width:900px){
  .player-grid{grid-template-columns: 1fr; grid-template-rows: auto auto}
  .cover{height:200px}
  .app-grid{grid-template-columns:1fr;grid-template-rows:auto 1fr auto auto}
  .player-card{padding:18px 10px;}
}

/* Responsive: mobile */
@media (max-width:480px){
  body{padding:8px}
  .cover{height:140px}
  .brand h1{font-size:1.1rem}
  .player-card{padding:10px 4px;}
  .font-wrap select{font-size:14px}
  .site-header{padding:10px 8px;}
}

/* helper */
.visually-hidden{position:absolute!important;height:1px;width:1px;overflow:hidden;clip:rect(1px,1px,1px,1px);white-space:nowrap}
img{height: 40px; width: 56px;}

#trackSelect{
  padding:7px 12px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,0.10);
  background:var(--glass);
  color:var(--text);
  font-weight:500;
  box-shadow:0 2px 8px rgba(2,6,23,0.08);
  transition: background 0.3s;
}