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var(--border);background:var(--panel);-webkit-backdrop-filter:blur(28px)saturate(130%);border-radius:24px;padding:22px;box-shadow:0 24px 70px #00000059,inset 0 1px #ffffff0d}.narrow{max-width:430px;margin:12vh auto 0}form{gap:16px;display:grid}label{color:#d1d1d6;gap:7px;font-size:.88rem;font-weight:600;display:grid}input{color:#fff;width:100%;min-height:48px;font:inherit;background:#00000042;border:1px solid #ffffff21;border-radius:13px;outline:none;padding:12px 14px;font-size:16px;transition:border-color .16s,box-shadow .16s}input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #0a84ff38}button{background:var(--accent);color:#fff;min-height:42px;font:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent;border:0;border-radius:999px;padding:10px 17px;font-weight:650;transition:filter .14s,transform .14s,opacity .14s}button:hover{filter:brightness(1.1)}button:active{transform:scale(.97)}button:disabled{opacity:.42;cursor:default}button.secondary,nav button{color:#f5f5f7;background:0 0}nav button{min-height:38px;padding:7px 10px;font-size:.9rem}nav button:focus{background:#ffffff1a}.list{gap:10px;margin-top:18px;display:grid}article{background:#ffffff0b;border:1px solid #ffffff12;border-radius:17px;justify-content:space-between;align-items:center;gap:16px;min-height:72px;padding:14px 16px;display:flex}article strong{font-size:1.03rem}article p{color:var(--muted);margin:4px 0 0;font-size:.9rem}.range-row{grid-template-columns:1fr 1fr;gap:12px;display:grid}.error{color:#ff6961}canvas{width:100%;height:260px;display:block}body.practice-active{background:#08090d;overflow:hidden}body.practice-active #app{width:100%;max-width:none;height:100dvh;padding:max(7px, env(safe-area-inset-top)) max(10px, env(safe-area-inset-right)) max(7px, env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left))}body.practice-active header,body.practice-active nav{display:none}.practice-card{width:100%;height:100%;box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;background:0 0;border:0;border-radius:0;grid-template-rows:auto auto minmax(0,1fr) auto;gap:7px;padding:0;display:grid;overflow:hidden}.practice-topbar,.practice-readout,.practice-controls{align-items:center;gap:8px;display:flex}.practice-topbar{justify-content:space-between;min-height:46px;padding:3px 4px 3px 12px}.practice-topbar h2{color:#f5f5f7;text-overflow:ellipsis;white-space:nowrap;margin:0;font-size:1.3rem;font-weight:700;overflow:hidden}.practice-controls{flex:none}.practice-controls button{min-height:36px;padding:7px 15px;font-size:.87rem}.practice-controls button.secondary{background:#ffffff1a}.practice-readout{color:#98989f;justify-content:space-between;min-height:30px;padding:0 12px;font-size:.84rem}.practice-readout strong{color:#d1d1d6;font-weight:600}.practice-card canvas{touch-action:none;background:#08090d;border:1px solid #ffffff17;border-radius:18px;height:100%;min-height:190px;margin:0;box-shadow:0 18px 55px #00000061,inset 0 1px #ffffff0a}.practice-card #result{text-align:center;color:#d1d1d6;min-height:0}.practice-card #result h3,.practice-card #result p{margin:0 6px;font-size:.9rem;display:inline}#rotate-hint{color:#ffb340;text-align:center;background:#ff9f0a24;border-radius:10px;margin:0;padding:6px 10px;font-size:.83rem;display:none}@media (orientation:portrait) and (width<=700px){body.practice-active{overflow:auto}body.practice-active #app{height:auto;min-height:100dvh}.practice-card{grid-template-rows:auto auto auto minmax(340px,1fr) auto;min-height:100dvh}.practice-topbar{flex-direction:column;align-items:flex-start;padding-top:8px}.practice-controls{width:100%}.practice-controls button{flex:1}.practice-readout{flex-direction:column;align-items:flex-start}#rotate-hint{display:block}}@media (width<=520px){#app{padding:14px}.card{border-radius:21px;padding:18px}article{flex-direction:column;align-items:flex-start}article button{width:100%}.range-row{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){button,input{transition:none}}