/* ---------- Góc nhạc (bgm.js): nhạc nền "Có Chút Ngọt Ngào"; player YouTube luôn hiện, không có lớp nào đè lên ---------- */
.bgm{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,430px);gap:12px 24px;align-items:center;padding:18px;margin:0 0 var(--gap,16px);border-radius:26px;border:1px solid var(--line);background:linear-gradient(120deg,var(--card),color-mix(in srgb,var(--soft) 75%,var(--card)));box-shadow:var(--shadow);overflow:hidden}
.bgm:before{content:"";position:absolute;left:-70px;bottom:-90px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,color-mix(in srgb,var(--end) 26%,transparent),transparent 70%);pointer-events:none}
.bgm>*{position:relative}
.bgm .en{display:none}html[data-lang="en"] .bgm .vi{display:none}html[data-lang="en"] .bgm .en{display:inline}html[data-lang="bi"] .bgm .en{display:inline}html[data-lang="bi"] .bgm .en::before{content:" / "}
.bgm-deck{display:flex;gap:20px;align-items:center;min-width:0}
.bgm-disc{flex:none;width:120px;height:120px;border-radius:50%;display:grid;place-items:center;background:repeating-radial-gradient(circle,#150a3a 0 2px,#22115a 2px 4px);box-shadow:0 12px 28px rgba(40,10,90,.4),inset 0 0 0 3px rgba(255,255,255,.45)}
.bgm-disc i{width:48%;height:48%;border-radius:50%;background:#ff9ccd center/cover;box-shadow:0 0 0 3px rgba(255,255,255,.55),0 0 0 8px rgba(10,5,40,.55)}
.bgm.on .bgm-disc{animation:bgmspin 7s linear infinite}
@keyframes bgmspin{to{transform:rotate(360deg)}}
.bgm-info{min-width:0}
.bgm-eb{margin:0 0 5px;display:flex;align-items:center;gap:9px;font:800 11px/1 var(--ui,system-ui);letter-spacing:.16em;text-transform:uppercase;color:var(--brand)}
.bgm-eq{display:inline-flex;gap:2px;align-items:flex-end;height:13px}
.bgm-eq i{width:3px;height:100%;border-radius:2px;background:var(--end);transform:scaleY(.3);transform-origin:50% 100%}
.bgm.on .bgm-eq i{animation:vu .8s ease-in-out infinite alternate}
.bgm-eq i:nth-child(2){animation-delay:-.2s!important}.bgm-eq i:nth-child(3){animation-delay:-.45s!important}.bgm-eq i:nth-child(4){animation-delay:-.1s!important}.bgm-eq i:nth-child(5){animation-delay:-.6s!important}
.bgm-t{margin:0;font:700 clamp(20px,2.6vw,27px)/1.2 var(--display,system-ui);letter-spacing:-.02em;color:var(--text)}
.bgm-a{margin:3px 0 0;font-size:14px;color:var(--muted)}
.bgm-sweet{margin:7px 0 12px;font-size:14.5px;color:var(--text)}
.bgm-ctl{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px}
.bgm-play{display:inline-flex;align-items:center;gap:9px;padding:11px 20px;border:0;border-radius:999px;cursor:pointer;font:700 14.5px/1 inherit;font-family:inherit;color:#fff;background:linear-gradient(135deg,var(--brand),var(--end));box-shadow:0 10px 24px color-mix(in srgb,var(--brand) 34%,transparent);transition:transform .15s,box-shadow .15s}
.bgm-play:hover{transform:translateY(-1px)}
.bgm-play[aria-pressed="true"]{background:linear-gradient(135deg,var(--end),var(--brand))}
.bgm-vol{display:inline-flex;align-items:center;gap:7px;font-size:15px}
.bgm-vol input{width:112px;accent-color:var(--brand)}
.bgm-yt{font-size:12.5px;font-weight:600;color:var(--muted);text-decoration:underline;text-underline-offset:3px}
.bgm-msg{margin:10px 0 0;padding:9px 13px;border-radius:12px;font-size:13px;line-height:1.5;color:var(--text);background:var(--sunk);border:1px solid var(--line)}
.bgm-msg a{color:var(--brand);font-weight:700}
.bgm-pl{z-index:1;width:100%;min-width:0;aspect-ratio:16/9;min-height:200px;border-radius:18px;overflow:hidden;background:#07041f;box-shadow:0 14px 34px rgba(30,10,80,.34)}
.bgm-pl iframe,.bgm-pl>div:not(.bgm-face){position:absolute;inset:0;width:100%;height:100%}
.bgm-face{position:absolute;inset:0;width:100%;height:100%;display:grid;place-items:center;border:0;padding:0;cursor:pointer;background-color:#07041f;background-size:cover;background-position:center}
.bgm-bigplay{display:grid;place-items:center;width:68px;height:68px;border-radius:50%;font-size:26px;padding-left:4px;color:#fff;background:linear-gradient(135deg,var(--brand),var(--end));box-shadow:0 10px 30px rgba(0,0,0,.45),0 0 0 6px rgba(255,255,255,.22);transition:transform .15s}
.bgm-face:hover .bgm-bigplay{transform:scale(1.08)}
.bgm-credit{grid-column:1/-1;margin:2px 0 0;font-size:11.5px;line-height:1.55;color:var(--muted)}
html.bgm-on .eq-deco i{animation-duration:calc(var(--t) * .55)}
@media (max-width:900px){.bgm{grid-template-columns:minmax(0,1fr);padding:16px}.bgm-disc{width:84px;height:84px}.bgm-deck{gap:14px;align-items:flex-start}}
@media (prefers-reduced-motion:reduce){.bgm.on .bgm-disc,.bgm.on .bgm-eq i{animation:none}}