@font-face{font-family:Noto Serif SC Subset;src:url(/assets/noto-serif-sc-subset-CELVkEvZ.woff2)format("woff2");font-weight:400 700;font-style:normal;font-display:swap}:root{--bg:#f5efe6;--surface:#fbf8f3;--surface-muted:#ece4d8;--ink:#2b2420;--muted:#6b5f55;--line:#ddd2c3;--line-strong:#b9ab99;--accent:#a84e3e;--accent-ink:#8c3e30;--accent-soft:#e7d3c8;--track:#e4dacc;--success:#2c6440;--success-bg:#e1eadb;--wrong:#8a4510;--wrong-bg:#f2e0c8;--radius:10px;--nav-height:64px;--font-ja:system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;--font-zh:"PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Noto Sans CJK SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;--font-hanzi:"Noto Serif SC Subset", "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", "SimSun", serif;--font-pinyin:"Helvetica Neue", "Segoe UI", Roboto, "Noto Sans", Arial, sans-serif;--font-mono:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;background:var(--bg)}body{background:var(--bg);color:var(--ink);font-family:var(--font-ja);-webkit-tap-highlight-color:transparent;margin:0;font-size:16px;line-height:1.6}:lang(zh){font-family:var(--font-zh)}.hanzi{font-family:var(--font-hanzi);letter-spacing:.04em;overflow-wrap:anywhere;font-weight:600}.pinyin{font-family:var(--font-pinyin);letter-spacing:.06em}button,input,select{font:inherit;color:inherit}:focus-visible{outline:3px solid color-mix(in srgb, var(--accent) 45%, transparent);outline-offset:2px}h1,h2,h3,p{margin:0}.muted{color:var(--muted);font-size:14px}.num{font-variant-numeric:tabular-nums}.visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.icon{flex:none}.app{min-height:100dvh}.app-main{max-width:680px;padding:0 16px calc(var(--nav-height) + 32px + env(safe-area-inset-bottom));margin:0 auto}.app-nav{z-index:10;background:var(--bg);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);position:fixed;inset:auto 0 0}.app-nav-title{display:none}.app-nav-list{grid-template-columns:repeat(5,1fr);max-width:560px;margin:0 auto;padding:0;list-style:none;display:grid}.app-nav-item{width:100%;height:var(--nav-height);color:var(--muted);cursor:pointer;background:0 0;border:0;flex-direction:column;justify-content:center;align-items:center;gap:2px;font-size:12px;display:flex}.app-nav-item[aria-current=page]{color:var(--accent);font-weight:600}.app-nav-item:hover{color:var(--ink)}.app-nav-item[aria-current=page]:hover{color:var(--accent-ink)}@media (width<=899px){html{scroll-padding-bottom:calc(var(--nav-height) + 16px + env(safe-area-inset-bottom))}:is(.app:has(.study-session) .app-nav,.app:has(.text-input:focus) .app-nav){display:none}.app:has(.study-session) .app-main{padding-bottom:0}}@media (width>=900px){.app{grid-template-columns:216px minmax(0,1fr);display:grid}.app-nav{border-top:0;border-right:1px solid var(--line);height:100dvh;padding:28px 16px;position:sticky;inset:0 auto auto}.app-nav-title{letter-spacing:.04em;padding:0 12px 24px;font-size:17px;font-weight:700;display:block}.app-nav-list{flex-direction:column;gap:4px;max-width:none;display:flex}.app-nav-item{border-radius:8px;flex-direction:row;justify-content:flex-start;gap:12px;height:44px;padding:0 12px;font-size:15px}.app-nav-item[aria-current=page]{background:var(--surface-muted)}.app-main{max-width:960px;margin:0;padding:0 48px 64px}}.top-bar{align-items:center;gap:4px 8px;min-height:64px;padding:10px 0;display:flex}.top-bar-title{letter-spacing:.04em;flex:1;min-width:0;font-size:20px;font-weight:700;line-height:1.35}.top-bar-back-button{margin-left:-10px}.top-bar-trailing{align-items:center;gap:8px;display:flex}.screen-lead{margin-bottom:20px}.button{border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--surface);cursor:pointer;text-align:center;touch-action:manipulation;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:8px 16px;line-height:1.3;display:inline-flex}.button:hover:not(:disabled){border-color:var(--ink)}.button:disabled{color:var(--muted);background:var(--surface-muted);border-color:var(--line);cursor:not-allowed}.button-primary{border-color:var(--accent);background:var(--accent);color:#fff;letter-spacing:.04em;font-weight:600}.button-primary:hover:not(:disabled){border-color:var(--accent-ink);background:var(--accent-ink)}.button-large{border-radius:12px;min-height:56px;padding:10px 20px;font-size:17px}.button-quiet{color:var(--accent-ink);background:0 0;border-color:#0000;padding-inline:8px}.button-quiet:hover:not(:disabled){border-color:#0000;text-decoration:underline}.button-quiet:disabled{background:0 0;border-color:#0000}.icon-button{width:44px;height:44px;color:var(--ink);cursor:pointer;touch-action:manipulation;background:0 0;border:0;border-radius:50%;justify-content:center;align-items:center;padding:0;display:inline-flex}.icon-button:hover{background:var(--surface-muted)}.speak-button{width:56px;height:56px}kbd{font-family:var(--font-mono);color:var(--muted);border:1px solid var(--line-strong);border-radius:4px;padding:0 4px;font-size:11px;line-height:1.5}.button-primary kbd{color:#fff;border-color:#ffffff8c}@media (hover:none){kbd{display:none}.key-hint{visibility:hidden}}.segmented{border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--surface);gap:3px;margin:0;padding:3px;display:inline-flex}.segmented>legend{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}.segmented label{cursor:pointer;border-radius:7px;align-items:center;min-height:38px;padding:4px 16px;font-size:15px;display:inline-flex;position:relative}.segmented input{opacity:0;cursor:pointer;margin:0;position:absolute;inset:0}.segmented label:has(input:checked){background:var(--ink);color:#fff}.segmented label:has(input:focus-visible){outline:3px solid color-mix(in srgb, var(--accent) 45%, transparent)}.answer-style{border:0;flex-wrap:wrap;align-items:center;gap:8px 12px;min-width:0;margin:0;padding:0;display:flex}.answer-style-legend{float:left;min-width:3.5em;color:var(--muted);padding:0;font-size:14px}.field-row{flex-wrap:wrap;align-items:center;gap:8px 12px;display:flex}.text-input,.select,.date-input{border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--surface);min-height:44px;padding:6px 12px}.text-input{width:100%}.text-input:focus,.select:focus,.date-input:focus{border-color:var(--ink)}.checkbox-row{cursor:pointer;align-items:flex-start;gap:10px;display:flex}.checkbox-row input,.lesson-row input,.choice input{width:18px;height:18px;accent-color:var(--accent);margin:3px 0 0}.checkbox-note{display:block}.lesson-picker{border:0;min-width:0;margin:0;padding:0}.lesson-picker legend{padding:0}.lesson-chips{flex-wrap:wrap;gap:6px;display:flex}.lesson-chip{border:1px solid var(--line-strong);background:var(--surface);cursor:pointer;border-radius:8px;align-items:center;min-height:40px;padding:4px 12px;font-size:15px;display:inline-flex;position:relative}.lesson-chip input{opacity:0;cursor:pointer;margin:0;position:absolute;inset:0}.lesson-chip:has(input:checked){border-color:var(--ink);background:var(--ink);color:#fff}.lesson-chip:has(input:disabled){cursor:default}.lesson-chip:has(input:focus-visible){outline:3px solid color-mix(in srgb, var(--accent) 45%, transparent);outline-offset:2px}.section{border-top:1px solid var(--line);padding:24px 0}.section-title{margin-bottom:12px;font-size:16px;font-weight:700}.section-note{margin-top:8px}.empty{padding:24px 0}.notice{border:1px solid var(--line);border-left:4px solid var(--wrong);border-radius:var(--radius);background:var(--surface);justify-content:space-between;align-items:flex-start;gap:12px;margin-top:16px;padding:12px 14px;font-size:15px;display:flex}.notice-info{border-left-color:var(--success)}.leave-dialog{border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--surface);width:min(400px,100vw - 32px);color:var(--ink);padding:20px}.leave-dialog::backdrop{background:#2b242066}.leave-dialog-title{margin:0 0 8px;font-size:18px}.leave-dialog p{margin:0 0 20px}.leave-dialog-actions{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.progress-header{flex-direction:column;gap:10px;padding:4px 0 8px;display:flex}.progress-header-row{color:var(--muted);letter-spacing:.04em;justify-content:space-between;align-items:baseline;gap:12px;font-size:16px;display:flex}.progress-count{white-space:nowrap;font-size:17px}.progress-track{background:var(--track);border-radius:2px;height:4px;overflow:hidden}.progress-fill{background:var(--accent);border-radius:2px;height:100%;transition:width .2s ease-out;display:block}.home,.review,.settings,.cram{max-width:680px}.home-head{padding:24px 0 4px}.home-title{letter-spacing:.04em;font-size:26px;font-weight:700;line-height:1.3}.home-range{color:var(--muted);margin-top:4px;font-size:15px}.deadline{border-top:1px solid var(--line);border-bottom:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 16px;margin:16px 0 8px;padding:14px 0;display:flex}.deadline-main{flex-wrap:wrap;align-items:baseline;gap:2px 14px;display:flex}.deadline-count{font-size:28px;font-weight:700;line-height:1.2}.deadline-date{color:var(--muted);font-size:15px}.deadline-none{font-size:17px;font-weight:600}.today{flex-direction:column;gap:16px;padding:16px 0 8px;display:flex}.today-title{font-size:16px;font-weight:700}.today-start{justify-content:space-between;width:100%}.today-done{border-radius:var(--radius);background:var(--surface-muted);padding:14px 16px}.today-table{border-collapse:collapse;width:100%;font-size:15px}.today-table th,.today-table td{border-bottom:1px solid var(--line);text-align:right;padding:8px 0;font-weight:400}.today-table thead{color:var(--muted);font-size:13px}.today-table .today-skill{text-align:left;font-weight:600}.today-table td{font-size:18px}.today-table .today-sum{font-weight:700}.today .button-quiet{align-self:flex-start}.home-footer{border-top:1px solid var(--line);color:var(--muted);margin-top:24px;padding-top:16px;font-size:14px}.sync-status{flex-wrap:wrap;align-items:center;gap:8px 16px;display:flex}.sync-status-line{flex-wrap:wrap;flex:100%;gap:4px 16px;margin:0;display:flex}.sync-unsent{color:var(--wrong)}.sync-message{flex:100%;margin:0}.sync-message-warning{color:var(--wrong)}.review-options{flex-direction:column;gap:12px;padding-bottom:20px;display:flex}.review-skill-head{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:0 16px;margin-bottom:12px;display:flex}.review-skill-head .section-title{margin-bottom:0}.mode-list{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.mode-button{border:1px solid var(--line-strong);background:var(--surface);cursor:pointer;text-align:left;border-radius:12px;justify-content:space-between;align-items:center;gap:12px;width:100%;min-height:60px;padding:10px 18px;display:flex}.mode-button:hover:not(:disabled){border-color:var(--accent)}.mode-button:disabled{color:var(--muted);background:var(--surface-muted);border-color:var(--line);cursor:not-allowed}.mode-name{font-size:17px;font-weight:600}.mode-count{color:var(--accent-ink);font-size:17px;font-weight:600}.mode-button:disabled .mode-count{color:var(--muted)}.mode-note{margin-top:4px}.review-cram{flex-direction:column;align-items:flex-start;gap:10px;display:flex}.review-cram .section-title{margin-bottom:0}.study-session{flex-direction:column;max-width:640px;min-height:100dvh;margin:0 auto;display:flex}.study-style{color:var(--muted);font-size:14px}.study-stage{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:14px;padding:24px 0;display:flex}.study-controls{padding:12px 0 calc(16px + env(safe-area-inset-bottom));background:var(--bg);flex-direction:column;gap:10px;display:flex;position:sticky;bottom:0}.prompt{flex-direction:column;align-items:center;gap:8px;display:flex}.prompt-kind{color:var(--muted);letter-spacing:.08em;font-size:13px}.prompt-meaning{max-width:18em;font-size:28px;font-weight:600;line-height:1.45}.prompt-pos{color:var(--muted);font-size:15px}.prompt-hanzi{font-size:72px;line-height:1.2}.prompt-audio{border:1px solid var(--line-strong);background:var(--surface);width:152px;height:152px;color:var(--ink);cursor:pointer;border-radius:50%;flex-direction:column;justify-content:center;align-items:center;gap:6px;font-size:15px;display:flex}.prompt-audio:hover:not(:disabled){border-color:var(--accent);color:var(--accent-ink)}.prompt-audio:disabled{color:var(--muted);cursor:not-allowed}.verdict{border-radius:8px;flex-wrap:wrap;justify-content:center;align-items:baseline;gap:2px 12px;padding:8px 16px;display:flex}.verdict-label{letter-spacing:.08em;font-size:17px;font-weight:700}.verdict-correct{color:var(--success);background:var(--success-bg)}.verdict-wrong{color:var(--wrong);background:var(--wrong-bg)}.verdict-input{color:var(--ink);font-size:15px}.answer-card{flex-direction:column;align-items:center;gap:4px;display:flex}.answer-hanzi{font-size:64px;line-height:1.2}.answer-pinyin{letter-spacing:.1em;font-size:24px}.answer-meaning{max-width:22em;font-size:17px}.answer-card .speak-button{margin-top:4px}.answer-form{gap:8px;display:flex}.answer-input{border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--surface);flex:1;min-width:0;min-height:56px;padding:8px 14px;font-size:22px}.answer-input:focus{border-color:var(--ink)}.answer-input[data-result=correct]{border-color:var(--success);background:var(--success-bg)}.answer-input[data-result=wrong]{border-color:var(--wrong);background:var(--wrong-bg)}.answer-form .button-primary{min-width:88px;min-height:56px;font-size:17px}.answer-tools{justify-content:space-between;align-items:center;gap:8px;display:flex}.grades{gap:8px;display:grid}.grades-4{grid-template-columns:repeat(4,1fr)}.grades-3{grid-template-columns:repeat(3,1fr)}.grades-1{grid-template-columns:1fr}.grade{flex-direction:column;gap:0;min-height:60px;padding:6px 4px}.grade-label{font-size:16px;font-weight:600}.grade-meta{color:var(--muted);align-items:center;gap:4px;font-size:12px;display:flex}.button-primary .grade-meta{color:#fff}.flip-reveal{width:100%}.study-finished .finished{flex-direction:column;flex:1;align-items:flex-start;gap:16px;padding:32px 0;display:flex}.finished-title{font-size:22px;font-weight:700;line-height:1.4}@media (width>=900px){.study-session{min-height:0}.study-stage{min-height:360px}.prompt-hanzi{font-size:96px}.answer-hanzi{font-size:80px}.study-controls{position:static}}.flashcards{max-width:640px;margin:0 auto}.flashcard{text-align:center;touch-action:pan-y;-webkit-user-select:none;user-select:none;flex-direction:column;justify-content:center;align-items:center;gap:16px;min-height:52dvh;padding:32px 8px;display:flex}.flashcard-hanzi{font-size:clamp(56px,20vw,80px);line-height:1.15}.flashcard-details{flex-direction:column;gap:6px;min-height:76px;display:flex}.flashcard-pinyin{letter-spacing:.12em;font-size:28px}.flashcard-meaning{font-size:18px}.flashcard-nav{grid-template-columns:1fr 2fr;gap:12px;margin-top:8px;display:grid}.flashcard-nav .button{min-height:56px;font-size:17px}.flashcard-options{border-top:1px solid var(--line);margin-top:32px}.flashcard-options summary{cursor:pointer;justify-content:space-between;align-items:center;min-height:52px;font-weight:600;list-style:none;display:flex}.flashcard-options summary::-webkit-details-marker{display:none}.flashcard-options summary:after{content:"";border-bottom:1.75px solid;border-right:1.75px solid;width:8px;height:8px;margin-right:6px;transform:rotate(45deg)}.flashcard-options[open] summary:after{transform:rotate(-135deg)}.flashcard-options-body{flex-direction:column;gap:18px;padding-bottom:16px;display:flex}.option-rows{flex-direction:column;gap:14px;display:flex}@media (width>=900px){.flashcard{min-height:420px}.flashcard-hanzi{font-size:104px}}.word-list-controls{flex-direction:column;gap:14px;margin-bottom:16px;display:flex}.word-count{margin-bottom:8px}.words{border-top:1px solid var(--line);margin:0;padding:0;list-style:none}.word-row{border-bottom:1px solid var(--line);grid-template-columns:auto 1fr auto;grid-template-areas:"hanzi pinyin play""hanzi meaning play""word word word""skill skill skill";align-items:center;gap:2px 14px;padding:12px 2px;display:grid}.word-head{display:none}.word-hanzi{overflow-wrap:anywhere;grid-area:hanzi;font-size:30px;line-height:1.2}.word-pinyin{grid-area:pinyin;font-size:17px}.word-meaning{grid-area:meaning;font-size:15px}.word-play{grid-area:play}.word-skill{flex-wrap:wrap;align-items:baseline;gap:2px 8px;font-size:14px;display:flex}.word-skill:nth-of-type(4){grid-area:word;margin-top:4px}.word-skill:nth-of-type(5){grid-area:skill}.word-skill-name{color:var(--muted);min-width:2.5em}.word-state{font-weight:600}.word-due{white-space:nowrap}.word-skill[data-state=new] .word-state{color:var(--muted);font-weight:400}.word-skill[data-state=relearning] .word-state{color:var(--wrong)}@media (width>=1180px){.word-row,.word-head{grid-template-columns:8.5em 8em minmax(8em,1fr) 10.5em 10.5em 3em;grid-template-areas:none;gap:12px}.word-head{color:var(--muted);padding-block:6px;font-size:13px;display:grid}.word-row>*{grid-area:auto}.word-skill:nth-of-type(4),.word-skill:nth-of-type(5){flex-direction:column;grid-area:auto;gap:0;margin-top:0}.word-skill-name{display:none}}.dash-skills{grid-template-columns:1fr;gap:0 40px;display:grid}@media (width>=720px){.dash-skills{grid-template-columns:1fr 1fr}}.dash-skill{border-top:1px solid var(--line);flex-direction:column;gap:12px;padding:20px 0 24px;display:flex}.dash-skill .section-title{margin-bottom:0}.stat-hero{font-size:48px;font-weight:600;line-height:1}.range-bar{background:var(--track);border-radius:5px;height:10px;position:relative;overflow:hidden}.range-bar span{border-radius:5px;position:absolute;inset:0 auto 0 0}.range-bar-started{background:var(--accent-soft)}.range-bar-established{background:var(--accent)}.range-legend{flex-wrap:wrap;gap:4px 20px;margin:0;font-size:14px;display:flex}.range-legend div{align-items:baseline;gap:6px;display:flex}.range-legend dt{color:var(--muted);align-items:center;gap:6px;display:inline-flex}.range-legend dd{margin:0;font-weight:600}.swatch{border-radius:2px;width:10px;height:10px;display:inline-block}.swatch-established{background:var(--accent)}.swatch-started{background:var(--accent-soft);outline:1px solid color-mix(in srgb, var(--accent) 40%, transparent)}.stat-list{grid-template-columns:1fr 2fr;gap:8px 16px;margin:4px 0 0;display:grid}.stat-list div{flex-direction:column-reverse;display:flex}.stat-list dt{color:var(--muted);font-size:13px}.stat-list dd{margin:0;font-size:18px;font-weight:600}.dash-section{margin-top:8px}.dash-section-head{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:4px 16px;margin-bottom:16px;display:flex}.dash-section-head .section-title{margin-bottom:0}.today-count{color:var(--ink);font-size:20px}.bar-chart{grid-template-columns:repeat(7,1fr);gap:6px;display:grid}.bar-col{flex-direction:column;align-items:center;gap:4px;display:flex}.bar-value{color:var(--muted);font-size:13px}.bar-track{border-bottom:1px solid var(--line-strong);align-items:flex-end;width:100%;max-width:40px;height:128px;display:flex;position:relative}.bar{background:color-mix(in srgb, var(--accent) 45%, var(--bg));border-radius:4px 4px 0 0;width:100%;min-height:2px;display:block}.bar[data-empty]{min-height:0}.bar-col-today .bar{background:var(--accent)}.bar-col-today .bar-value{color:var(--ink);font-weight:600}.bar-label{color:var(--muted);flex-direction:column;align-items:center;font-size:12px;line-height:1.3;display:flex}.bar-col-today .bar-label{color:var(--ink);font-weight:600}.lesson-table{border-collapse:collapse;width:100%;font-size:15px}.lesson-table th,.lesson-table td{border-bottom:1px solid var(--line);text-align:left;padding:10px 8px 10px 0;font-weight:400}.lesson-table thead th{color:var(--muted);font-size:13px}.lesson-table tbody th{white-space:nowrap;font-weight:600}.num-col{text-align:right;width:3.5em}.lesson-table .num-col{text-align:right;padding-right:16px}.meter-cell{align-items:center;gap:8px;display:flex}.meter-value{text-align:right;min-width:3em}.meter{background:var(--track);border-radius:3px;flex:1;max-width:160px;height:6px;overflow:hidden}.meter-fill{background:var(--accent);border-radius:3px;height:100%;display:block}.cram-options{border-top:0;flex-direction:column;gap:20px;padding-top:0;display:flex}.choice-list{border:0;flex-direction:column;gap:4px;margin:0;padding:0;display:flex}.choice-list legend{padding:0}.choice{cursor:pointer;flex-wrap:wrap;align-items:center;gap:4px 10px;min-height:44px;display:flex}.choice input{margin:0}.cram-start{flex-wrap:wrap;align-items:center;gap:8px 16px;margin-top:8px;display:flex}.cram-start .button{justify-content:space-between;min-width:220px}.resume-card{border-top:1px solid var(--line);border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;gap:12px;padding:20px 0;display:flex}.resume-card .section-title{margin-bottom:0}.lesson-list{border-top:1px solid var(--line);margin:0;padding:0;list-style:none}.lesson-row{border-bottom:1px solid var(--line)}.lesson-row label{cursor:pointer;grid-template-columns:24px 1fr;align-items:baseline;gap:2px 10px;padding:10px 2px;display:grid}.lesson-row input{align-self:center;margin:0}.lesson-name{font-weight:600}.lesson-name span{margin-left:8px;font-weight:400}.lesson-stats{color:var(--muted);grid-column:2;font-size:13px}.file-input{opacity:0;width:1px;height:1px;position:absolute}.settings .section:first-of-type{border-top:0;padding-top:0}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto;transition:none;animation:none}}
