@font-face{font-family:Manrope;font-weight:400;font-display:swap;src:url(/fonts/manrope-0.ttf)format("truetype")}@font-face{font-family:Manrope;font-weight:500;font-display:swap;src:url(/fonts/manrope-1.ttf)format("truetype")}@font-face{font-family:Manrope;font-weight:600;font-display:swap;src:url(/fonts/manrope-2.ttf)format("truetype")}@font-face{font-family:Manrope;font-weight:700;font-display:swap;src:url(/fonts/manrope-3.ttf)format("truetype")}@font-face{font-family:Manrope;font-weight:800;font-display:swap;src:url(/fonts/manrope-4.ttf)format("truetype")}:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#111512;--surface:#181d19;--raised:#1f2620;--hover:#252d26;--line:#2c352d;--line-strong:#3b463c;--text:#eceee6;--muted:#a3ada4;--faint:#737e74;--sage:#b1cba8;--sage-strong:#c8dfbf;--sage-ink:#13201a;--sage-soft:#1d2e22;--sage-glow:#b1cba824;--red:#e3ab9c;--red-soft:#33241f;--amber:#e2c98d;--amber-soft:#2e2919;--paper:#eef1e8;--radius:18px;--radius-s:12px;--sans:"Manrope", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--jp:"UD Digi Kyokasho N-R", "UD デジタル 教科書体 N-R", "UD Digi Kyokasho NK-R", "Klee One", "YuKyokasho", "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", "Meiryo", "Noto Sans JP", "Noto Sans CJK JP", sans-serif;--tabbar:64px}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text);font:500 16px/1.55 var(--sans);-webkit-font-smoothing:antialiased;margin:0}body.no-scroll{overflow:hidden}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer}button:disabled{cursor:default}a{color:var(--sage)}:lang(ja),[lang=ja]{font-family:var(--jp);font-weight:500}h1,h2,h3{letter-spacing:-.01em;margin:0;line-height:1.2}p{margin:0}:focus-visible{outline:2px solid var(--sage);outline-offset:2px}::selection{background:var(--sage);color:var(--sage-ink)}.shell{min-height:100dvh}.sidebar{display:none}.main{min-width:0;padding-bottom:calc(var(--tabbar) + env(safe-area-inset-bottom) + 24px)}.in-run .main{padding-bottom:0}.page{flex-direction:column;gap:22px;max-width:920px;margin:0 auto;padding:16px 16px 0;display:flex}.brand{color:var(--text);align-items:center;gap:12px;font-size:18px;font-weight:800;text-decoration:none;display:flex}.brand small{color:var(--faint);letter-spacing:.02em;font-size:12px;font-weight:600;display:block}.brand-mark{background:var(--sage);width:38px;height:38px;color:var(--sage-ink);border-radius:12px;flex:none;place-items:center;font-size:21px;font-weight:700;display:grid}.brand-mark.big{border-radius:20px;width:64px;height:64px;font-size:34px}.brand.compact{gap:10px;font-size:17px}.brand.compact .brand-mark{border-radius:10px;width:32px;height:32px;font-size:18px}.mobile-top{z-index:20;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);background:#111512e0;align-items:center;gap:6px;padding:10px 12px 10px 16px;display:flex;position:sticky;top:0}.mobile-top .brand{margin-right:auto}.tabbar{z-index:30;height:calc(var(--tabbar) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-top:1px solid var(--line);background:#141915f5;grid-template-columns:repeat(5,1fr);display:grid;position:fixed;inset:auto 0 0}.tabbar a{color:var(--faint);flex-direction:column;justify-content:center;align-items:center;gap:3px;font-size:11px;font-weight:700;text-decoration:none;display:flex;position:relative}.tabbar a.active{color:var(--sage)}.tabbar .dot{background:var(--amber);border-radius:50%;width:8px;height:8px;position:absolute;top:10px;left:calc(50% + 9px)}@media (width>=900px){.shell:not(.in-run){grid-template-columns:248px minmax(0,1fr);display:grid}.sidebar{border-right:1px solid var(--line);background:var(--surface);flex-direction:column;gap:28px;height:100dvh;padding:24px 16px;display:flex;position:sticky;top:0}.sidebar nav{flex-direction:column;gap:4px;display:flex}.sidebar-foot{flex-direction:column;gap:6px;margin-top:auto;display:flex}.mobile-top,.tabbar{display:none}.main{padding-bottom:48px}.page{gap:28px;padding:40px 40px 0}}.nav-link{border-radius:var(--radius-s);width:100%;color:var(--muted);text-align:left;background:0 0;border:0;align-items:center;gap:12px;padding:11px 12px;font-weight:600;text-decoration:none;display:flex}.nav-link:hover{background:var(--hover);color:var(--text)}.nav-link.active{background:var(--sage-soft);color:var(--sage-strong)}.nav-badge{background:var(--amber-soft);min-width:22px;color:var(--amber);text-align:center;border-radius:99px;margin-left:auto;padding:1px 7px;font-size:12px}.sync{border:1px solid var(--line);color:var(--muted);background:0 0;border-radius:99px;align-items:center;gap:8px;padding:8px 12px;font-size:12.5px;font-weight:600;display:inline-flex}.sync.saved{color:var(--sage)}.sync.error,.sync.offline{color:var(--amber)}.mobile-top .sync{border:0;padding:9px}.splash{place-items:center;min-height:100dvh;display:grid}.splash.inline{min-height:50vh}.splash .brand-mark{animation:1.4s ease-in-out infinite pulse}@keyframes pulse{50%{opacity:.5}}.eyebrow{color:var(--sage);letter-spacing:.08em;text-transform:uppercase;font-size:12px;font-weight:800;display:block}.page-head{flex-direction:column;gap:8px;display:flex}.page-head h1{font-size:clamp(28px,6vw,38px);font-weight:800}.page-head p{color:var(--muted);max-width:640px}.section-head{justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:12px;display:flex}.section-head h2{font-size:19px}.section-head a{font-size:14px;font-weight:700;text-decoration:none}.group-title{color:var(--muted);text-transform:capitalize;margin:6px 0 10px;font-size:15px}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}.panel.quiet{background:0 0}.panel h3{margin-bottom:10px;font-size:16px}.panel.empty{text-align:center;flex-direction:column;align-items:center;gap:12px;padding:40px 20px;display:flex}.hint,.small-note{color:var(--muted);font-size:14.5px}.small-note{color:var(--faint);font-size:13.5px}.credit{color:var(--faint);font-size:12px}.error-text{color:var(--red);font-size:13.5px}.stack{flex-direction:column;gap:10px;display:flex}.row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.back{color:var(--muted);background:0 0;border:0;align-self:flex-start;align-items:center;gap:4px;padding:6px 10px 6px 4px;font-weight:700;display:inline-flex}.back:hover{color:var(--text)}.button{border:1px solid #0000;border-radius:14px;justify-content:center;align-items:center;gap:8px;min-height:48px;padding:0 20px;font-size:15.5px;font-weight:750;text-decoration:none;transition:transform 80ms,background .15s;display:inline-flex;position:relative}.button:active:not(:disabled){transform:scale(.98)}.button.primary{background:var(--sage);color:var(--sage-ink)}.button.primary:hover:not(:disabled){background:var(--sage-strong)}.button.secondary{background:var(--raised);border-color:var(--line-strong);color:var(--text)}.button.ghost{border-color:var(--line-strong);color:var(--text);background:0 0}.button.ghost:hover:not(:disabled),.button.secondary:hover:not(:disabled){background:var(--hover)}.button:disabled{opacity:.45}.button.wide{width:100%}.button input[type=file],label.button input{opacity:0;cursor:pointer;position:absolute;inset:0}.icon-button{width:40px;height:40px;color:var(--muted);background:0 0;border:0;border-radius:12px;place-items:center;text-decoration:none;display:inline-grid}.icon-button:hover{background:var(--hover);color:var(--text)}.text-button{color:var(--sage);background:0 0;border:0;align-items:center;gap:6px;padding:6px 0;font-size:14px;font-weight:700;display:inline-flex}.pill{background:var(--sage-soft);color:var(--sage);border-radius:99px;align-self:flex-start;padding:5px 11px;font-size:12.5px;font-weight:800;display:inline-flex}.chip-row{flex-wrap:wrap;gap:8px;display:flex}.chip{border:1px solid var(--line-strong);background:var(--raised);border-radius:12px;align-items:baseline;gap:6px;padding:7px 12px;display:inline-flex}.chip span{font-size:22px;line-height:1.1}.chip small{color:var(--muted);font-size:13px}.chip.text{color:var(--muted);font-size:13.5px}.chip.static{cursor:default}button.chip:hover{border-color:var(--sage)}.jp-inline{font-family:var(--jp);color:var(--text);padding:0 .04em;font-size:1.22em;line-height:1}.tabs{scrollbar-width:none;gap:6px;padding-bottom:2px;display:flex;overflow-x:auto}.tabs button{border:1px solid var(--line-strong);color:var(--muted);background:0 0;border-radius:99px;flex:none;padding:9px 16px;font-size:14.5px;font-weight:700}.tabs button.active{background:var(--sage);border-color:var(--sage);color:var(--sage-ink)}.segmented{background:var(--raised);border:1px solid var(--line);border-radius:14px;padding:4px;display:inline-flex}.segmented button{color:var(--muted);background:0 0;border:0;border-radius:10px;padding:8px 16px;font-weight:700}.segmented button.active{background:var(--sage);color:var(--sage-ink)}.search{border:1px solid var(--line-strong);background:var(--surface);color:var(--faint);border-radius:14px;align-items:center;gap:10px;padding:0 14px;display:flex}.search input{background:0 0;border:0;outline:none;flex:1;min-width:0;padding:13px 0}input[type=password],textarea,select{border:1px solid var(--line-strong);background:var(--bg);border-radius:12px;width:100%;padding:12px 14px}textarea{resize:vertical}select{width:auto;max-width:100%}.field-label{color:var(--muted);margin:10px 0 6px;font-size:14px;font-weight:700;display:block}.toast{z-index:70;left:50%;bottom:calc(var(--tabbar) + env(safe-area-inset-bottom) + 14px);background:var(--paper);width:min(520px,100% - 32px);color:var(--sage-ink);border-radius:14px;padding:13px 16px;font-size:14.5px;font-weight:650;animation:.2s ease-out rise;position:fixed;transform:translate(-50%);box-shadow:0 10px 30px #0006}@media (width>=900px){.toast{bottom:24px}}.in-run .toast{bottom:96px}@keyframes rise{0%{opacity:0;transform:translate(-50%,8px)}}.greeting h1{font-size:clamp(24px,5.5vw,32px);font-weight:800}.greeting p{color:var(--muted);margin-top:6px}.hero{border:1px solid var(--line-strong);background:linear-gradient(140deg,#1f2c22,#171d18 70%);border-radius:24px;flex-direction:column;gap:12px;padding:24px;display:flex;position:relative;overflow:hidden}.hero h2{max-width:80%;font-size:clamp(24px,5vw,30px);font-weight:800}.hero p{color:var(--muted);max-width:520px}.hero .button{align-self:flex-start;margin-top:6px}.hero-kana{color:var(--sage);opacity:.13;pointer-events:none;white-space:nowrap;writing-mode:vertical-rl;letter-spacing:.04em;font-size:64px;line-height:1;position:absolute;top:14px;right:18px}@media (width<=520px){.hero-kana{font-size:40px;right:12px}}.hero.compact{flex-flow:wrap;align-items:center;gap:16px 18px}.hero.compact>div{flex:260px}.hero.compact h2{max-width:none;font-size:21px}.hero.compact .button{margin:0}.stat-row{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}.stat{border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);color:var(--sage);flex-direction:column;gap:2px;padding:14px;display:flex}.stat strong{color:var(--text);margin-top:4px;font-size:24px;font-weight:800}.stat span{color:var(--muted);font-size:12.5px;line-height:1.3}.cards-2{gap:12px;display:grid}@media (width>=640px){.cards-2{grid-template-columns:1fr 1fr}}.action{border-radius:var(--radius);border:1px solid var(--line);background:var(--surface);text-align:left;align-items:center;gap:14px;padding:16px;display:flex}.action:hover{border-color:var(--line-strong);background:var(--raised)}.action>span:nth-child(2){flex-direction:column;flex:1;gap:2px;display:flex}.action small{color:var(--muted);font-size:13.5px}.action>svg{color:var(--faint)}.action-icon{background:var(--sage-soft);width:46px;height:46px;color:var(--sage);border-radius:14px;flex:none;place-items:center;display:grid}.week-track{gap:8px;margin:0;padding:0;list-style:none;display:flex}.week-track li{color:var(--faint);flex-direction:column;flex:1;align-items:center;gap:6px;font-size:12px;font-weight:700;display:flex}.week-track button{aspect-ratio:1;border:1px solid var(--line-strong);background:var(--surface);width:100%;max-width:72px;color:var(--muted);border-radius:16px;font-size:24px}.week-track li.done button{background:var(--sage-soft);color:var(--sage);border-color:#0000}.week-track li.current button{border-color:var(--sage);color:var(--text);box-shadow:0 0 0 4px var(--sage-glow)}.week-track button:disabled{opacity:.4}.week-block{flex-direction:column;gap:14px;display:flex}.week-title h2{margin:4px 0;font-size:21px}.week-title p{color:var(--muted);font-size:14.5px}.week-number{color:var(--sage);text-transform:uppercase;letter-spacing:.08em;font-size:12.5px;font-weight:800}.soon{border:1px dashed var(--line-strong);border-radius:var(--radius);color:var(--faint);padding:14px 16px;font-size:14px}.path{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.path-row{border-radius:var(--radius);border:1px solid var(--line);background:var(--surface);text-align:left;align-items:center;gap:14px;width:100%;padding:14px 16px;display:flex}.path-row:hover:not(:disabled){background:var(--raised);border-color:var(--line-strong)}.path-row:disabled{opacity:.5}.path-row.current{border-color:var(--sage);box-shadow:0 0 0 3px var(--sage-glow)}.path-row.homework{background:0 0;border-style:dashed;width:calc(100% - 22px);margin-left:22px}.path-mark{background:var(--raised);width:40px;height:40px;color:var(--muted);border-radius:12px;flex:none;place-items:center;font-weight:800;display:grid}.path-row.done .path-mark{background:var(--sage-soft);color:var(--sage)}.path-row.current .path-mark{background:var(--sage);color:var(--sage-ink)}.path-copy{flex-direction:column;flex:1;min-width:0;display:flex}.path-copy small{color:var(--muted);font-size:13.5px}.path-kana{color:var(--faint);letter-spacing:.08em;font-size:20px;display:none}.path-row>svg{color:var(--faint);flex:none}@media (width>=640px){.path-kana{display:block}}.intro-grid{gap:14px;display:grid}@media (width>=860px){.intro-grid{grid-template-columns:1.4fr 1fr;align-items:start}}.intro-kana{grid-template-columns:repeat(5,1fr);gap:8px;margin-bottom:18px;display:grid}.intro-kana button{aspect-ratio:1;border:1px solid var(--line-strong);background:var(--raised);border-radius:14px;font-size:clamp(28px,7vw,38px)}.intro-kana button:hover{border-color:var(--sage)}.intro-words{color:var(--text);margin-bottom:18px;font-size:21px;line-height:1.6}.intro-meta{color:var(--muted);flex-wrap:wrap;gap:8px 14px;margin-bottom:16px;font-size:13.5px;display:flex}.intro-meta span{align-items:center;gap:6px;display:inline-flex}.outline{color:var(--muted);flex-direction:column;gap:6px;margin:0 0 14px;padding-left:20px;display:flex}.player{flex-direction:column;min-height:100dvh;display:flex}.player-bar{z-index:20;padding:10px 16px;padding-top:max(10px, env(safe-area-inset-top));-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#111512eb;align-items:center;gap:12px;display:flex;position:sticky;top:0}.player-progress{background:var(--raised);border-radius:99px;flex:1;height:8px;overflow:hidden}.player-progress i{border-radius:inherit;background:var(--sage);height:100%;transition:width .3s;display:block}.player-count{color:var(--faint);text-align:right;font-variant-numeric:tabular-nums;min-width:52px;font-size:13px;font-weight:700}.player-body{flex-direction:column;flex:1;gap:16px;width:100%;max-width:760px;margin:0 auto;padding:8px 16px 24px;display:flex}.player-heading h1{margin-top:6px;font-size:clamp(22px,5vw,30px);font-weight:800}.player-actions{z-index:20;padding:12px 16px;padding-bottom:max(12px, env(safe-area-inset-bottom));background:linear-gradient(to top, var(--bg) 70%, #11151200);justify-content:space-between;gap:10px;width:100%;max-width:760px;margin:0 auto;display:flex;position:sticky;bottom:0}.player-actions .button.primary{flex:1;max-width:360px;margin-left:auto}.player-actions .tutor-inline{border:1px solid var(--line-strong);background:var(--raised);width:48px;height:48px;color:var(--sage);border-radius:50%;flex:none;place-items:center;display:grid}.player-actions .tutor-inline:hover{background:var(--sage-soft)}.theory{flex-direction:column;gap:14px;font-size:16.5px;display:flex}.theory p{line-height:1.65}.tip{border-radius:var(--radius-s);background:var(--amber-soft);color:#efe2c2;gap:10px;padding:12px 14px;font-size:15px;display:flex}.tip svg{color:var(--amber);flex:none;margin-top:2px}.example{border-radius:var(--radius-s);background:var(--raised);border-left:3px solid var(--sage);flex-direction:column;align-items:flex-start;gap:6px;margin:0;padding:16px;display:flex}.example-jp{white-space:pre-line;font-size:26px;line-height:1.5}.example figcaption{color:var(--muted);white-space:pre-line;font-size:14.5px}.flow{flex-wrap:wrap;gap:8px;display:flex}.flow-step{background:var(--raised);border-radius:10px;align-items:center;gap:8px;padding:8px 12px;font-size:15px;display:inline-flex}.flow-step svg{color:var(--faint)}.pairs{flex-direction:column;gap:8px;margin:0;display:flex}.pairs div{background:var(--raised);border-radius:12px;align-items:center;gap:14px;padding:10px 14px;display:flex}.pairs dt{min-width:64px;font-size:24px}.pairs dd{color:var(--muted);margin:0;font-size:14.5px}.card-grid{gap:10px;display:grid}.card-grid.kana{grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr))}.card-grid.words{grid-template-columns:repeat(auto-fill,minmax(min(100%,240px),1fr))}.card-grid.small{margin-top:12px}.kana-card{border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);flex-direction:column;gap:10px;padding:16px;display:flex}.kana-card-top{align-items:center;gap:16px;display:flex}.kana-card-top>div{flex-direction:column;align-items:flex-start;gap:2px;display:flex}.kana-big{cursor:pointer;background:var(--paper);width:84px;height:84px;color:var(--sage-ink);border:0;border-radius:18px;flex:none;place-items:center;font-size:58px;line-height:1;display:grid}.kana-reading{font-size:26px;font-weight:800}.mnemonic{color:var(--text);font-size:15px;line-height:1.5}.item-note{color:var(--muted);font-size:13.5px;line-height:1.5}.kana-card-bottom{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:6px 12px;display:flex}.similar{color:var(--faint);font-size:13px}.similar span{color:var(--muted);margin-left:6px;font-size:19px}.word-card{border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);grid-template-columns:1fr auto;gap:4px 10px;padding:14px 16px;display:grid}.word-main{flex-wrap:wrap;align-items:baseline;gap:10px;display:flex}.word-jp{text-align:left;background:0 0;border:0;padding:0;font-size:28px;line-height:1.25}.word-reading{color:var(--faint);font-size:14px}.word-meaning{grid-column:1;font-weight:700}.word-card .sound{grid-area:1/2/3;align-self:center}.word-card .item-note{grid-column:1/-1;margin-top:4px}.sound{flex-direction:column;align-items:flex-start;gap:4px;display:inline-flex}.sound-button{border:1px solid var(--line-strong);background:var(--raised);color:var(--sage);border-radius:12px;align-items:center;gap:8px;padding:10px 16px;font-weight:700;display:inline-flex}.sound-button:hover,.sound-compact:hover{background:var(--sage-soft)}.sound-compact{color:var(--sage);background:var(--sage-soft)}[data-playing]{box-shadow:0 0 0 3px var(--sage-glow)}.questions{flex-direction:column;gap:12px;display:flex}.question{border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);flex-direction:column;gap:12px;padding:16px;scroll-margin:80px;display:flex}.question.correct{border-color:#b1cba880}.question.retry{border-color:var(--amber);box-shadow:0 0 0 3px #e2c98d1f}.question.wrong{border-color:#e3ab9c8c}.question-head{align-items:center;gap:10px;display:flex}.question-head h3{color:var(--muted);flex:1;font-size:15.5px;font-weight:700}.question-number{background:var(--raised);width:26px;height:26px;color:var(--faint);border-radius:8px;flex:none;place-items:center;font-size:13px;font-weight:800;display:grid}.badge{white-space:nowrap;border-radius:99px;align-items:center;gap:4px;padding:3px 9px;font-size:12px;font-weight:800;display:inline-flex}.badge.ok{background:var(--sage-soft);color:var(--sage)}.badge.warn{background:var(--amber-soft);color:var(--amber)}.question-context{color:var(--faint);font-size:13.5px;font-weight:700}.question-display{text-align:center;padding:6px 0}.question-display.jp-large{font-size:clamp(52px,15vw,72px);line-height:1.15}.question-display.jp-text{white-space:pre-line;text-align:left;background:var(--raised);border-radius:12px;padding:14px 16px;font-size:26px;line-height:1.6}.question-display.ru{font-size:21px;font-weight:750;line-height:1.35}.question-audio{justify-content:center;display:flex}.question-audio .sound-button{padding:14px 24px;font-size:16px}.options{grid-template-columns:1fr 1fr;gap:8px;display:grid}.option{border:1px solid var(--line-strong);background:var(--raised);border-radius:14px;min-height:54px;padding:10px 12px;font-size:15.5px;font-weight:650;line-height:1.3;transition:border-color .12s,background .12s}.options.jp .option{font-family:var(--jp);font-size:28px;font-weight:500}.options.jp .option .jp-inline{font-size:1em}.options.jp.long{grid-template-columns:1fr}.options.jp.long .option{text-align:left;padding:12px 16px;font-size:21px}.option:hover:not(:disabled){border-color:var(--sage)}.option.selected{border-color:var(--sage);background:var(--sage-soft);color:var(--sage-strong);box-shadow:inset 0 0 0 1px var(--sage)}.option:disabled{cursor:default}.option:disabled:not(.selected):not(.reveal){opacity:.55}.option.reveal{border-color:var(--sage);border-style:dashed}.question.wrong .option.selected{border-color:var(--red);background:var(--red-soft);color:var(--red);box-shadow:none}.answer-input{border:1px solid var(--line-strong);background:var(--bg);width:100%;font-size:22px;font-family:var(--jp);text-align:center;border-radius:14px;padding:14px 16px}.answer-input:focus{border-color:var(--sage);box-shadow:0 0 0 3px var(--sage-glow);outline:none}.answer-input::placeholder{font-family:var(--sans);color:var(--faint);font-size:15px}.explanation{background:var(--raised);border-radius:12px;flex-direction:column;align-items:flex-start;gap:6px;padding:12px 14px;font-size:14.5px;display:flex}.explanation p{color:var(--muted)}.question.wrong .explanation{background:var(--red-soft)}.tiles{flex-direction:column;gap:10px;display:flex}.tiles-answer{border:1px dashed var(--line-strong);background:var(--bg);border-radius:14px;flex-wrap:wrap;justify-content:center;align-items:center;gap:6px;min-height:62px;padding:8px;display:flex}.tiles-placeholder{color:var(--faint);font-size:14px;font-family:var(--sans)}.tiles-bank{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.tile{border:1px solid var(--line-strong);background:var(--raised);min-width:50px;height:50px;font-size:26px;font-family:var(--jp);border-radius:12px;padding:0 8px}.tile:disabled{opacity:.25}.tile.placed{background:var(--sage-soft);border-color:var(--sage);color:var(--sage-strong)}.tile.placed:disabled{opacity:1}.tile.tool{color:var(--muted);place-items:center;display:grid}.match .hint{margin-bottom:14px}.match-grid{grid-template-columns:1fr 1fr;gap:10px;display:grid}.match-col{flex-direction:column;gap:8px;display:flex}.match-cell{border:1px solid var(--line-strong);background:var(--raised);border-radius:14px;min-height:56px;padding:8px;font-size:15px;font-weight:700;transition:all .15s}.match-cell.left{font-family:var(--jp);font-size:30px;font-weight:500}.match-cell.selected{border-color:var(--sage);background:var(--sage-soft);box-shadow:0 0 0 3px var(--sage-glow)}.match-cell.done{opacity:.28;pointer-events:none;border-style:dashed}.match-cell.wrong{border-color:var(--red);background:var(--red-soft);animation:.3s shake}@keyframes shake{25%{transform:translate(-4px)}75%{transform:translate(4px)}}.match-result{color:var(--muted);flex-direction:column;gap:12px;display:flex}.match-result>svg{color:var(--sage)}.match-review{flex-wrap:wrap;gap:8px;display:flex}.match-review span{background:var(--raised);border-radius:10px;align-items:baseline;gap:6px;padding:6px 10px;font-size:14px;display:inline-flex}.match-review b{color:var(--text);font-size:21px;font-weight:500}.recorder{border-radius:var(--radius);border:1px dashed var(--line-strong);flex-wrap:wrap;align-items:center;gap:12px;margin-top:14px;padding:14px;display:flex}.recorder>div{flex:220px}.recorder p{color:var(--muted);font-size:13.5px}.recorder audio{width:100%}.finish{text-align:center;flex-direction:column;align-items:center;gap:14px;max-width:640px;margin:0 auto;padding:48px 16px;display:flex}.finish h1{font-size:clamp(26px,6vw,34px);font-weight:800}.finish-icon{background:var(--sage);width:76px;height:76px;color:var(--sage-ink);border-radius:24px;place-items:center;display:grid}.finish-stats{grid-template-columns:repeat(3,1fr);gap:10px;width:100%;margin:8px 0;display:grid}.finish-stats div{border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);flex-direction:column;padding:14px 8px;display:flex}.finish-stats strong{font-size:26px;font-weight:800}.finish-stats span{color:var(--muted);font-size:12.5px}.finish-mistakes{text-align:left;width:100%}.finish-mistakes h3{color:var(--muted);margin-bottom:10px;font-size:15px}.finish-actions{flex-direction:column;gap:10px;width:100%;max-width:380px;margin-top:8px;display:flex}.weak-list{flex-direction:column;gap:6px;display:flex}.weak-row{background:var(--surface);border:1px solid var(--line);border-radius:14px;align-items:center;gap:14px;padding:10px 14px;display:flex}.weak-jp{min-width:64px;font-size:28px}.weak-copy{flex-direction:column;flex:1;min-width:0;display:flex}.weak-copy small{color:var(--faint);font-size:12.5px}.weak-score{color:var(--muted);font-variant-numeric:tabular-nums;font-size:13px}.hw-card{border-radius:var(--radius);border:1px solid var(--line);background:var(--surface);text-align:left;flex-direction:column;align-items:flex-start;gap:6px;padding:20px;display:flex}.hw-card:hover:not(:disabled){border-color:var(--line-strong);background:var(--raised)}.hw-card:disabled{opacity:.55}.hw-glyph{color:var(--sage);margin:6px 0;font-size:54px;line-height:1.1}.hw-card strong{font-size:19px}.hw-card small{color:var(--muted);font-size:14px}.hw-state{color:var(--sage);align-items:center;gap:6px;margin-top:8px;font-size:14px;font-weight:800;display:inline-flex}.hw-steps{flex-direction:column;gap:12px;margin:0;padding:0;list-style:none;display:flex}.hw-steps li{flex-direction:column;align-items:flex-start;gap:10px;display:flex}.hw-steps li>p{color:var(--muted);font-size:15px}.hw-steps h3{align-items:center;gap:10px;margin:0;display:flex}.hw-steps h3 span{background:var(--sage-soft);width:28px;height:28px;color:var(--sage);border-radius:9px;place-items:center;font-size:14px;display:grid}.hw-steps li.done h3 span{background:var(--sage);color:var(--sage-ink)}.write-grid{grid-template-columns:repeat(auto-fill,minmax(52px,1fr));gap:6px;width:100%;display:grid}.write-grid button{aspect-ratio:1;border:1px solid var(--line-strong);background:var(--paper);color:var(--sage-ink);border-radius:12px;font-size:28px}.write-line{letter-spacing:.06em;font-size:26px}.write-words{flex-wrap:wrap;gap:8px;display:flex}.write-words span{background:var(--raised);border-radius:12px;flex-direction:column;padding:8px 12px;display:inline-flex}.write-words b{font-size:14px;font-weight:700}.write-words i{color:var(--faint);filter:blur(5px);font-size:15px;font-style:normal;transition:filter .2s}.write-words span:hover i,.write-words span:focus-within i{filter:none}.dictation{flex-direction:column;gap:6px;width:100%;display:flex}.dictation-row{align-items:center;gap:12px;min-height:44px;display:flex}.dictation-n{width:24px;color:var(--faint);text-align:right;font-weight:800}.dictation-answer{color:var(--muted);font-size:14px}.dictation-answer b{color:var(--text);margin-right:6px;font-size:22px;font-weight:500}.read-aloud{flex-wrap:wrap;gap:8px;font-size:22px;display:flex}.read-aloud span{background:var(--paper);color:var(--sage-ink);border-radius:12px;padding:8px 14px}.check-line{color:var(--muted);background:0 0;border:0;align-items:center;gap:10px;padding:8px 0;font-size:14.5px;font-weight:700;display:inline-flex}.check-line>span{border:2px solid var(--line-strong);border-radius:7px;place-items:center;width:22px;height:22px;display:grid}.check-line.on{color:var(--sage)}.check-line.on>span{background:var(--sage);border-color:var(--sage);color:var(--sage-ink)}.upload{border-radius:var(--radius-s);border:1px dashed var(--line-strong);width:100%;color:var(--sage);flex-wrap:wrap;align-items:center;gap:12px;padding:14px;display:flex}.upload>div{color:var(--text);flex-direction:column;flex:200px;display:flex}.upload small{color:var(--muted);font-size:13px}.photos{flex-wrap:wrap;gap:10px;display:flex}.photo{width:120px;margin:0}.photo img{object-fit:cover;border-radius:12px;width:120px;height:120px}.photo figcaption{color:var(--faint);font-size:12px}.photo-link{font-size:14px}.hw-finish{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;display:flex}.hw-finish p{color:var(--muted);flex:260px}.sheet-toggle{border-radius:var(--radius);border:1px solid var(--line-strong);background:var(--surface);text-align:left;justify-content:space-between;align-items:center;width:100%;padding:16px 20px;display:flex}.sheet-toggle span{color:var(--sage);font-size:14px;font-weight:700}.cheatsheet{flex-direction:column;gap:12px;margin-top:12px;display:flex}details{border-top:1px solid var(--line)}details summary{cursor:pointer;padding:12px 0;font-weight:700;list-style-position:inside}details[open] summary{color:var(--sage)}details>.theory{padding-bottom:14px}.kana-chart{flex-direction:column;gap:6px;display:flex}.chart-row{grid-template-columns:22px repeat(5,1fr);gap:6px;display:grid}.chart-row.head span{text-align:center;color:var(--faint);font-size:12px;font-weight:800}.chart-consonant{color:var(--faint);place-items:center;font-size:12px;font-weight:800;display:grid}.chart-cell{border:1px solid var(--line);background:var(--raised);border-radius:12px;flex-direction:column;justify-content:center;align-items:center;min-height:62px;padding:6px 0;display:flex}.chart-cell span{font-size:clamp(24px,6vw,32px);line-height:1.15}.chart-cell small{color:var(--faint);font-size:11.5px;font-weight:700}.chart-cell.learned{background:var(--sage-soft);border-color:#b1cba859}.chart-cell.learned small{color:var(--sage)}.chart-cell.empty{background:0 0;border:0}.chart-cell:disabled{opacity:.3}.chart-cell:hover:not(:disabled){border-color:var(--sage)}.settings{flex-direction:column;padding:4px 20px;display:flex}.setting{border-bottom:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 20px;padding:18px 0;display:flex}.setting:last-child{border-bottom:0}.setting>div:first-child{flex:280px}.setting h3{margin-bottom:4px}.setting p{color:var(--muted);font-size:14px}.login{place-items:center;min-height:100dvh;padding:16px;display:grid}.login-card{flex-direction:column;align-items:stretch;gap:10px;width:min(420px,100%);padding:28px;display:flex}.login-card .brand-mark{align-self:center;margin-bottom:6px}.login-card h1{text-align:center;font-size:28px}.login-card>p{color:var(--muted);text-align:center;margin-bottom:8px;font-size:14.5px}.login-card .text-button{color:var(--muted);align-self:center;font-weight:600}.backdrop{z-index:60;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#050806b3;justify-content:center;align-items:flex-end;animation:.15s fade;display:flex;position:fixed;inset:0}@keyframes fade{0%{opacity:0}}.modal{width:100%;max-height:92dvh;padding:20px;padding-bottom:max(20px, env(safe-area-inset-bottom));background:var(--surface);border:1px solid var(--line-strong);border-radius:24px 24px 0 0;flex-direction:column;gap:12px;animation:.2s ease-out slide;display:flex;overflow-y:auto}@keyframes slide{0%{opacity:.5;transform:translateY(24px)}}@media (width>=700px){.backdrop{align-items:center}.modal{border-radius:24px;width:min(520px,100% - 32px)}.modal.tutor{width:min(640px,100% - 32px)}}.modal-head{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.modal-head h2{font-size:22px}.modal-head h2 span{vertical-align:middle;font-size:40px}.modal-head h2 small{color:var(--muted);margin-left:6px;font-size:20px}.stroke-paper{background:var(--paper);border-radius:18px;place-items:center;padding:10px;display:grid}.stroke-paper img{width:min(240px,70vw);height:auto}.tutor-status{color:var(--muted);align-items:center;gap:8px;margin-top:4px;font-size:13px;display:flex}.tutor-status i{background:var(--faint);border-radius:50%;width:8px;height:8px}.tutor-status i.on{background:var(--sage)}.tutor-context{border:1px solid var(--line);border-radius:12px;padding:0 12px}.tutor-context summary{color:var(--muted);font-size:13.5px}.tutor-context pre{white-space:pre-wrap;font:500 12.5px/1.5 var(--sans);color:var(--faint);max-height:180px;margin:0 0 12px;overflow-y:auto}.tutor-log{flex-direction:column;gap:10px;min-height:160px;max-height:46dvh;display:flex;overflow-y:auto}.tutor-empty{color:var(--muted);flex-direction:column;gap:12px;padding:8px 0;font-size:14.5px;display:flex}.msg{border-radius:16px;max-width:92%;padding:12px 14px;font-size:15px;line-height:1.55}.msg.user{background:var(--sage-soft);color:var(--sage-strong);white-space:pre-wrap;align-self:flex-end}.msg.assistant{background:var(--raised);flex-direction:column;align-self:flex-start;gap:8px;display:flex}.msg.assistant ul{margin:0;padding-left:18px}.msg.thinking{color:var(--muted);background:0 0;align-items:center;gap:8px;padding:4px 0;display:inline-flex}.spin{animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.tutor-form{align-items:flex-end;gap:8px;display:flex}.tutor-form textarea{flex:1}.tutor-form .button{min-height:50px;padding:0 16px}.tutor-tools{flex-wrap:wrap;gap:4px 16px;display:flex}.tutor-tools .text-button{color:var(--muted);font-size:13px;font-weight:600}.tutor-fab{z-index:40;left:16px;bottom:calc(var(--tabbar) + env(safe-area-inset-bottom) + 14px);border:1px solid var(--line-strong);background:var(--raised);width:54px;height:54px;color:var(--sage);border-radius:50%;place-items:center;display:grid;position:fixed;box-shadow:0 8px 24px #00000059}.tutor-fab:hover{background:var(--sage-soft)}.in-run .tutor-fab{display:none}@media (width>=900px){.shell:not(.in-run) .tutor-fab{display:none}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}}