*{box-sizing:border-box}body,html{height:100%;margin:0;font-family:Arial,Helvetica,sans-serif;color:#fff}
/* background video */
#bgVideo{position:fixed;left:50%;top:50%;min-width:100%;min-height:100%;width:auto;height:auto;transform:translate(-50%,-50%);z-index:-2;filter:blur(6px) brightness(.6);object-fit:cover}
.overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;z-index:5}
.enter-btn{padding:18px 36px;border-radius:10px;background:rgba(255,255,255,0.12);border:2px solid rgba(255,255,255,0.18);backdrop-filter:blur(4px);color:#fff;font-size:20px;cursor:pointer;transition:all .6s ease}
.enter-btn:hover{transform:translateY(-4px);box-shadow:0 6px 20px rgba(0,0,0,.4)}

/* main content card */
.hidden{display:none}
main{min-height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px;gap:20px}
.card{width:520px;max-width:92%;background:rgba(30,30,30,0.55);backdrop-filter:blur(6px);border-radius:14px;padding:26px 28px;text-align:center;box-shadow:0 10px 40px rgba(0,0,0,0.5)}
.logo{width:250px;height:150px;object-fit:contain;margin:0 auto 8px;display:block}
.title{margin:6px 0 2px;font-size:30px;letter-spacing:1px}
.subtitle{margin:0 0 18px;color:rgba(255,255,255,0.75)}

/* song box */
.song-box{display:flex;align-items:center;background:linear-gradient(180deg,rgba(255,255,255,0.03),rgba(255,255,255,0.01));border-radius:8px;padding:10px;box-shadow:inset 0 0 0 4px rgba(200,150,80,0.15);margin:0 20px;width:360px;max-width:92%}
.song-art img{width:110px;height:70px;object-fit:cover;border-radius:4px;display:block;box-shadow:0 4px 12px rgba(0,0,0,0.4)}
.song-info{flex:1;padding-left:16px;text-align:left;display:flex;flex-direction:column;justify-content:space-between}
.song-title{font-weight:700;font-size:20px;color:rgba(255,255,255,0.9)}
.song-meta{font-size:14px;color:rgba(255,255,255,0.7);margin-top:4px}

/* controls */
.controls{margin-top:10px;display:flex;gap:10px}
.btn{padding:8px 16px;border-radius:8px;border:none;cursor:pointer;font-weight:700}
.btn.green{background:#2ecc71;color:#fff}
.btn.red{background:#e74c3c;color:#fff}

/* notification */
.notif-wrap{position:fixed;right:20px;bottom:18px;display:flex;flex-direction:column;gap:10px;z-index:20}
.notif{min-width:220px;padding:12px 14px;border-radius:10px;background:rgba(30,30,30,0.9);backdrop-filter:blur(4px);box-shadow:0 8px 30px rgba(0,0,0,0.4);transform:translateY(20px);opacity:0;animation:rise .6s forwards}
@keyframes rise{to{transform:translateY(0);opacity:1}}