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(max-width:640px),(pointer:coarse){.level-tab{min-height:44px;padding-inline:14px}}.level-tab[data-l=TOPIC].active{background:var(--accent)}.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr));gap:1rem}.topic-card{display:flex;flex-direction:column;gap:10px;padding:1.1rem 1.25rem;background:var(--surface);border:1px solid var(--border);border-radius:12px;text-decoration:none;color:inherit;transition:box-shadow .15s,border-color .15s;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.topic-card:hover{border-color:var(--tc);box-shadow:0 4px 16px color-mix(in srgb,var(--tc) 20%,transparent)}.topic-card:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.topic-card-head{display:flex;align-items:center;gap:10px}.topic-card-icon{width:40px;height:40px;border-radius:10px;flex-shrink:0;display:grid;place-items:center;font-size:1.25rem;color:var(--accent-ink);background:color-mix(in srgb,var(--tc) 14%,transparent)}.topic-card-name{font-size:1rem;font-weight:700;color:var(--text);line-height:1.3}.topic-card-badge{margin-top:2px;font-size:.75rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text3)}.topbar-right{margin-left:auto;display:flex;align-items:center;gap:8px}.filter-select{background:var(--surface);border:1px solid var(--border);color:var(--text2);font-family:DM Sans,sans-serif;font-size:.75rem;padding:5px 8px;border-radius:5px;outline:none;cursor:pointer}[data-theme=light] .filter-select{background:var(--surface2);color:var(--text2)}.view-toggle{display:flex;gap:2px;background:var(--surface);border:1px solid var(--border);border-radius:5px;padding:2px}.view-btn{padding:4px 7px;border:none;background:transparent;color:var(--text3);cursor:pointer;border-radius:3px;transition:background-color .15s,border-color .15s,color .15s,box-shadow .15s,transform .15s,opacity .15s;font-size:.75rem}.view-btn.active{background:var(--surface3);color:var(--text)}.content{padding:1.5rem}.module-section{margin-bottom:2rem}.module-header{gap:10px;margin-bottom:1rem;padding-bottom:.75rem;border-bottom:1px solid var(--border)}.module-header,.module-icon-lg{display:flex;align-items:center}.module-icon-lg{width:32px;height:32px;border-radius:6px;justify-content:center;font-family:Shippori Mincho,serif;font-size:1rem;font-weight:700;flex-shrink:0}.module-name-lg{font-size:.95rem;font-weight:700;color:var(--text)}.module-sub-lg{font-size:.75rem;color:var(--text3);margin-top:1px}.module-meta{margin-left:auto;display:flex;align-items:center;gap:8px}.meta-tag{font-size:.75rem;font-weight:600;letter-spacing:.08em;padding:3px 8px;border-radius:3px;text-transform:uppercase}.see-all{font-size:.75rem;color:var(--text3);text-decoration:none;display:flex;align-items:center;gap:4px;transition:color .15s;cursor:pointer;border:none;background:none;font-family:DM 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var(--border)}.lesson-tag{font-size:.75rem;color:var(--text3);background:var(--surface3);padding:2px 6px;border-radius:3px}.lesson-srs{margin-left:auto;display:flex;gap:2px;align-items:center}.srs-pip{width:5px;height:5px;border-radius:50%;background:var(--border2)}.srs-pip.done{background:var(--gold)}.kanji-card .lesson-ja{font-size:2.4rem}.grammar-card .lesson-ja{font-size:1rem;font-family:DM Sans,sans-serif;font-weight:700;color:var(--ink-red)}.grammar-pattern{font-size:.8rem;color:var(--text2);font-family:Shippori Mincho,serif}.listening-card .lesson-ja{font-size:.9rem;font-family:DM 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wave{0%,to{opacity:.4;transform:scaleY(.6)}50%{opacity:1;transform:scaleY(1)}}.duration-tag{font-size:.75rem;color:var(--text3);margin-left:auto}.lesson-list{display:flex;flex-direction:column;gap:2px}.lesson-row{display:flex;align-items:center;gap:1rem;padding:10px 1rem;background:var(--surface);border:1px solid var(--border);border-radius:6px;cursor:pointer;transition:background-color .15s,border-color .15s,color .15s,box-shadow .15s,transform .15s,opacity .15s}.lesson-row:hover{background:var(--surface2);border-color:var(--border2)}.hamburger{display:none;flex-direction:column;justify-content:center;align-items:center;gap:4px;width:32px;height:32px;background:transparent;border:1px solid var(--border);border-radius:6px;cursor:pointer;flex-shrink:0;padding:5px;transition:background .15s,border-color .15s}.hamburger:hover{background:var(--surface2);border-color:var(--border2)}.hamburger span{display:block;width:14px;height:1.5px;background:var(--text2);border-radius:2px;transition:transform .25s ease,opacity .2s ease;transform-origin:center}.hamburger.open span:first-child{transform:translateY(5.5px) rotate(45deg)}.hamburger.open span:nth-child(2){opacity:0;transform:scaleX(0)}.hamburger.open span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:89;backdrop-filter:blur(2px);opacity:0;transition:opacity .25s ease}.sidebar-overlay.active{display:block;opacity:1}.sidebar-toggle-btn{display:flex;align-items:center;gap:8px;width:100%;padding:9px 1rem;background:transparent;border:none;border-bottom:1px solid var(--border);color:var(--text2);cursor:pointer;font-size:.75rem;font-weight:600;font-family:DM Sans,sans-serif;transition:background .15s,color .15s;flex-shrink:0}.sidebar-toggle-btn:hover{background:var(--surface2);color:var(--text)}.sidebar-toggle-btn:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.sidebar-toggle-btn .ui-icon{font-size:1rem;transition:transform .2s}.theme-toggle{position:relative;width:52px;height:26px;flex-shrink:0;cursor:pointer}.theme-toggle input{opacity:0;width:0;height:0;position:absolute}.theme-track{position:absolute;inset:0;border-radius:13px;background:var(--surface3);border:1px solid var(--border2);transition:background .3s,border-color .3s;display:flex;align-items:center;padding:0 5px;justify-content:space-between;font-size:.8rem;color:var(--text2);overflow:hidden}.theme-toggle input:focus-visible~.theme-track{outline:2px solid var(--accent);outline-offset:2px}.theme-thumb{position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:var(--text2);color:var(--bg);transition:transform .25s cubic-bezier(.4,0,.2,1),background .25s;display:flex;align-items:center;justify-content:center;font-size:.8rem;box-shadow:0 1px 4px rgba(0,0,0,.3)}.theme-thumb .t-thumb-sun{display:none}[data-theme=light] .theme-thumb{transform:translateX(26px);background:var(--hue-gold);color:#fff}[data-theme=light] .theme-thumb .t-thumb-sun{display:block}[data-theme=light] .theme-thumb .t-thumb-moon{display:none}@keyframes fadeIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.content>*{animation:fadeIn .4s ease both}@keyframes spin{to{transform:rotate(1turn)}}.auth-page{height:100%;overflow-y:auto;background:var(--bg);display:flex;justify-content:center;align-items:flex-start;padding:clamp(12px,4vh,48px) 16px 32px}@media (min-width:640px) and (min-height:760px){.auth-page{align-items:center}}.auth-card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:clamp(16px,5vw,28px) clamp(18px,5vw,32px) clamp(20px,5vw,32px);font-family:DM 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strong{color:var(--text);overflow-wrap:anywhere}.auth-google{min-height:44px;display:flex;justify-content:center}.auth-divider{display:flex;align-items:center;gap:10px;margin:1.1rem 0;font-size:.8rem;color:var(--text3)}.auth-divider:after,.auth-divider:before{content:"";flex:1;height:1px;background:var(--border)}.auth-form{gap:1rem}.auth-field,.auth-form{display:flex;flex-direction:column}.auth-field{gap:6px}.auth-label{font-size:.85rem;font-weight:600;color:var(--text2)}.auth-optional{font-weight:500;color:var(--text3)}.auth-input{width:100%;min-height:44px;padding:10px 12px;font-size:1rem;font-family:DM Sans,sans-serif;color:var(--text);background:var(--surface2);border:1px solid var(--border);border-radius:8px;outline:none;transition:border-color .15s,box-shadow .15s}.auth-input::-moz-placeholder{color:var(--text3)}.auth-input::placeholder{color:var(--text3)}.auth-input:focus-visible{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 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