/* 液态玻璃(参考: 深色半透明胶囊 + 强模糊 + 内高光 + 渐变描边)，全局面板/按钮/滑块/提示统一使用 */
.glass{position:relative;border:1px solid rgba(255,255,255,.07);background:linear-gradient(180deg,rgba(255,255,255,.12),rgba(255,255,255,.02) 45%),var(--glass);backdrop-filter:blur(26px) saturate(170%) brightness(.92);-webkit-backdrop-filter:blur(26px) saturate(170%) brightness(.92);box-shadow:inset 0 1px 1px rgba(255,255,255,.28),inset 0 -1px 1px rgba(255,255,255,.1),inset 0 0 22px rgba(255,255,255,.05),0 14px 36px rgba(0,0,0,.35)}
.btn{appearance:none;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.08);border-radius:999px;padding:7px 15px;cursor:pointer;transition:background .2s,transform .15s;box-shadow:inset 0 1px 0 rgba(255,255,255,.2)}
.btn:hover{background:rgba(255,255,255,.16)}.btn:active{transform:scale(.96)}
.btn:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn.primary{background:rgba(122,242,71,.2);border-color:rgba(122,242,71,.38)}
.btn.primary:hover{background:rgba(122,242,71,.3)}
.btn.big{padding:11px 26px;font-size:16px}
.btn.icon{width:36px;height:36px;padding:0;display:inline-grid;place-items:center}
.btn svg{width:18px;height:18px;fill:currentColor}
select.btn{padding-right:10px}select.btn option{color:#111}
/* 液态进度条: 已播放部分为主色渐变，其余为半透明白 */
input[type=range]{-webkit-appearance:none;appearance:none;height:10px;border-radius:99px;border:0;padding:0;background-color:rgba(255,255,255,.26);background-image:var(--grad);background-repeat:no-repeat;background-size:var(--p,0%) 100%}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:0;height:10px}
input[type=range]::-moz-range-thumb{width:0;height:10px;border:0}input[type=range]::-moz-range-track{background:transparent}
#toast{position:fixed;left:50%;bottom:calc(30px + var(--sab));transform:translateX(-50%);padding:10px 20px;border-radius:999px;z-index:50;max-width:90vw;text-align:center}
#drop{position:fixed;inset:0;z-index:40;display:grid;place-items:center;background:rgba(0,0,0,.4)}
#drop .glass{padding:30px 48px;border-radius:var(--radius);font-size:18px}