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16px;display:grid}.drop-zone{min-height:170px;color:var(--green);background:var(--green-soft);cursor:pointer;border:1px dashed #91aa9d;flex-direction:column;justify-content:center;align-items:center;display:flex;position:relative}.drop-zone input{opacity:0;cursor:pointer;position:absolute;inset:0}.drop-zone .drop-icon{font-size:2rem;font-weight:300}.drop-zone small{color:var(--muted)}.import-help{margin-top:20px}.import-help>strong{margin-bottom:7px;font-size:.76rem;display:block}.import-help code{color:#40514a;background:var(--paper);padding:15px;font-family:inherit;font-size:.7rem;display:block}.toast{z-index:70;color:#fff;background:var(--ink);border-radius:8px;align-items:center;gap:20px;padding:13px 16px;font-size:.78rem;display:flex;position:fixed;bottom:28px;right:28px;box-shadow:0 14px 34px #1729243d}.toast button{color:#e9c46a;background:0 0;padding:0;font-weight:700}@keyframes pulse{to{opacity:.35}}@media (max-width:1050px){:root{--sidebar:204px}.page{width:min(100% - 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0;flex-direction:column;justify-content:center;align-items:center;gap:1px;font-size:.62rem;display:flex}.mobile-nav button span{font-family:Noto Serif SC,serif;font-size:1rem;font-weight:700}.mobile-nav button.active{color:var(--green)}.mobile-nav .study-fab{position:relative;top:-25px}.mobile-nav .study-fab span{color:#fff;background:var(--green);border:5px solid var(--paper);border-radius:50%;place-items:center;width:56px;height:56px;display:grid;box-shadow:0 8px 24px #1f57483d}.learn-topbar{grid-template-columns:38px 1fr auto;gap:10px;padding:11px 14px}.learn-progress-line{grid-area:2/1/auto/-1}.display-count{grid-area:1/3}.study-stage{width:calc(100% - 22px);margin-top:14px}.study-card{border-radius:18px 5px}.card-front{min-height:270px;padding:34px 22px}.card-front h1{font-size:2.7rem}.material-text{font-size:1.15rem;line-height:1.9}.answer-content{padding:0 22px 36px}.judgement-buttons{bottom:calc(68px + env(safe-area-inset-bottom));gap:8px;position:sticky}.judgement-buttons button{min-height:68px;padding:10px 15px}.result-grid{grid-template-columns:repeat(2,1fr)}.head-actions{width:100%}.head-actions button{flex:1}.library-card{grid-template-columns:45px 1fr auto;gap:15px;padding:20px 14px}.library-monogram{width:45px;height:55px;font-size:1.2rem}.library-card p{-webkit-line-clamp:2;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.library-card-stats span:nth-child(n+3),.library-card-side>span:last-child{display:none}.library-detail-head{flex-direction:column;align-items:stretch;display:flex}.metrics-line{grid-template-columns:none;grid-auto-columns:105px;grid-auto-flow:column;overflow-x:auto}.filter-bar{flex-direction:column;align-items:stretch}.filter-bar select{min-height:44px}.content-row{grid-template-columns:36px minmax(0,1fr) 28px;gap:11px;padding:16px 6px}.content-type{width:32px;height:32px}.content-progress{grid-column:2}.row-menu{grid-area:1/3}.stat-hero{grid-template-columns:repeat(2,1fr)}.stat-hero>div{padding:20px}.forgotten-list{grid-template-columns:1fr}.forgotten-list button:nth-child(odd),.forgotten-list button:nth-child(2n){border-right:0;padding-left:8px;padding-right:8px}.interval-steps{justify-content:flex-start;overflow-x:auto}.interval-steps i{min-width:12px}.modal-backdrop{align-items:end;padding:0}.modal-sheet{width:100%;max-height:92vh;padding:30px 20px calc(30px + env(safe-area-inset-bottom));border-radius:18px 18px 0 0}.mode-grid{grid-template-columns:1fr 1fr}.form-grid{grid-template-columns:1fr}.form-grid .wide{grid-column:1}.toast{right:12px;bottom:calc(80px + env(safe-area-inset-bottom));justify-content:space-between;left:12px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}