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env(safe-area-inset-left));border-right:1px solid var(--line);background:linear-gradient(180deg, var(--bg-1), #0c1526);box-shadow:var(--shadow-pop);transition:transform var(--dur) ease;position:fixed;top:0;bottom:0;left:0;overflow:hidden auto;transform:translate(-105%)}.drawer-open .sidebar{transform:translate(0)}.drawer-backdrop{z-index:30;opacity:0;pointer-events:none;transition:opacity var(--dur) ease;background:#00000080;display:block;position:fixed;inset:0}.drawer-open .drawer-backdrop{opacity:1;pointer-events:auto}.nav__list{flex-direction:column;gap:6px}.nav__item{width:100%;min-width:0;min-height:48px}.nav__progress{display:inline}.layout--reading{flex-direction:column;display:flex}.layout--reading .manual{border-radius:var(--r-md);flex:auto;min-height:0}.manual__article{padding:24px 18px 64px}.manual__title{font-size:22px}.camera-toggle{z-index:10;border:1px solid var(--line-strong);border-radius:var(--r-full);min-height:44px;color:var(--ink-dim);cursor:pointer;touch-action:manipulation;background:#0f172ab8;align-items:center;gap:5px;padding:0 12px;font-family:inherit;font-size:12px;font-weight:600;display:inline-flex;position:absolute;top:8px;right:8px}.camera-toggle:active{color:var(--ink);background:#1b2739e6}.stage-toast{z-index:10;border-radius:var(--r-full);border:1px solid var(--line-strong);pointer-events:none;background:#0f172aeb;align-items:center;gap:6px;max-width:calc(100% - 132px);padding:7px 12px;font-size:12.5px;font-weight:600;display:none;position:absolute;top:8px;left:8px}.stage-toast.is-show,.stage-toast__icon{display:inline-flex}.stage-toast__text{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.stage-toast--ok{color:#b8f5cd}.stage-toast--ok .stage-toast__icon{color:var(--green)}.stage-toast--fail{color:#fbc8c8}.stage-toast--fail .stage-toast__icon{color:var(--red)}}@media (orientation:landscape) and (max-height:500px){.topbar{flex-wrap:nowrap;min-height:52px;padding-top:4px;padding-bottom:4px}.topbar__brand{flex:0 auto}.topbar__nav{flex:auto;order:1}.topbar__progress{order:2}.layout{grid-template-columns:minmax(0,1fr) minmax(300px,340px);align-items:stretch;gap:8px;padding-top:6px;display:grid}.stage{aspect-ratio:auto;flex:auto;min-height:0}.panel{flex:none;min-height:0}.layout--reading{grid-template-columns:1fr}}@media (max-width:768px),(orientation:landscape) and (max-height:500px){.btn,.chip,.seg,.controls__btn,.controls__speed,.nav__item,.course-tab,.shot-picker__dot,.practice__actions .btn{touch-action:manipulation}.btn{min-height:44px;padding:11px 16px}.btn--sm,.chip{min-height:44px;padding:10px 14px}.chip:active,.nav__item:active,.course-tab:active{background:var(--bg-2);color:var(--ink)}.controls{gap:8px;padding:8px 10px}.controls__btn{width:44px;height:44px}.controls__track{background:0 0;height:28px;position:relative;overflow:visible}.controls__track:before{content:"";border-radius:var(--r-full);background:var(--bg-2);height:8px;position:absolute;top:50%;left:0;right:0;transform:translateY(-50%)}.controls__fill{height:8px;position:relative;top:50%;transform:translateY(-50%)}.controls__speed{min-width:44px;min-height:44px;font-size:12.5px}.seg{min-height:44px;padding:10px 4px}.shot-picker__face{grid-template-rows:repeat(3,20px);grid-template-columns:repeat(3,20px)}.shot-picker__dot{width:20px;height:20px}.panel__actions{gap:10px}.panel__actions .btn{justify-content:center;width:100%;min-height:48px}.panel__actions--grid{grid-template-columns:1fr}.practice__actions{gap:10px}.practice__actions .btn{min-height:44px}}