/* Shared visual language with 枫叶苑; study layout stays independent. */
:root{color-scheme:light;--bg:#f8f7f3;--bg-glow-1:transparent;--bg-glow-2:transparent;--bg-glow-3:transparent;--panel-bg:#f0f0e8;--card-bg:#fcfbf8;--card-bg-hover:#f1f1e9;--elevated:#e9ecdf;--sidebar-bg:#f4f4ed;--border:#dedfd6;--border-strong:#bdc5b5;--slot-border:#98a28b;--text:#283a33;--text-secondary:#5e6b60;--text-faint:#64715e;--accent:#a64931;--accent-2:#6c7f50;--accent-soft:#a6493112;--accent-glow:transparent;--grad:linear-gradient(120deg,#a64931,#93462f);--correct:#27663e;--correct-soft:#27663e15;--wrong:#a83636;--wrong-soft:#a8363615;--warn:#86621e;--tag-core:#a83636;--tag-high:#86621e;--tag-low:#5e6b60;--tag-recog:#27663e;--shadow:0 16px 50px #283a3314;--shadow-sm:0 3px 14px #283a3308;--radius-lg:12px;--radius-md:10px;--radius-sm:6px}
:root[data-theme=dark]{color-scheme:dark;--bg:#181c1b;--panel-bg:#222923;--card-bg:#1e2420;--card-bg-hover:#293229;--elevated:#303b2d;--sidebar-bg:#202720;--border:#373e37;--border-strong:#55614e;--slot-border:#6f7d60;--text:#e4e8df;--text-secondary:#b2bbb0;--text-faint:#a2afa0;--accent:#e7a186;--accent-2:#a2b283;--accent-soft:#e7a18616;--grad:linear-gradient(120deg,#b86242,#984831);--correct:#8fc79a;--correct-soft:#8fc79a18;--wrong:#ed9898;--wrong-soft:#ed989818;--warn:#dcc282;--tag-core:#ed9898;--tag-high:#dcc282;--tag-low:#b2bbb0;--tag-recog:#8fc79a;--shadow:0 16px 50px #0003;--shadow-sm:0 3px 14px #0002}
body{display:block;padding:0 28px 32px;background:var(--bg);transition:none}body.browse{display:grid;grid-template-columns:210px minmax(0,1fr);height:auto;min-height:100vh;overflow:visible;padding:0 28px 32px;align-content:start}.maple-header{max-width:1112px;margin:0 auto 36px;min-height:108px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--border);grid-column:1/-1;width:100%;font:14px 'Segoe UI','Microsoft YaHei',sans-serif}.maple-brand{display:flex;align-items:center;gap:13px;text-decoration:none;color:var(--text);font:26px Georgia,SimSun,serif;letter-spacing:2px;white-space:nowrap}.maple-brand img{width:34px}.maple-brand small{display:block;font:8px/2.6 'Segoe UI',sans-serif;letter-spacing:2px;color:var(--text-secondary)}.maple-actions,.maple-nav{display:flex;gap:30px;align-items:center}.maple-nav a{color:var(--text-secondary);text-decoration:none;padding:12px 0;white-space:nowrap}.maple-nav a[aria-current]{color:var(--accent);border-bottom:1px solid var(--accent)}.theme-toggle{border-radius:50%;width:38px;height:38px;display:grid;place-items:center;padding:0;font-size:22px;color:var(--text);background:transparent;flex-shrink:0}.sun{display:none}[data-theme=dark] .sun{display:block}[data-theme=dark] .moon{display:none}.maple-footer{grid-column:1/-1;max-width:1112px;margin:50px auto 0;padding:24px 0 0;border-top:1px solid var(--border);font-size:12px;color:var(--text-secondary);line-height:2}.maple-footer a{color:var(--accent)}.container{margin:0 auto;box-shadow:none}.mode-home{margin:45px auto 0;text-align:left;max-width:1050px}.mode-home>h1{text-align:left;font-size:clamp(30px,5vw,46px)}h1,.browse-sidebar h2{background:none;-webkit-text-fill-color:currentColor;color:var(--text);font-family:Georgia,'Songti SC',SimSun,serif;font-weight:500}.home-eyebrow{font-size:11px;letter-spacing:3px}.today-panel{margin-top:14px}.mode-card{border-radius:10px;box-shadow:none}.mode-card-icon{font-size:24px}.home-links{justify-content:flex-start}.primary,.mode-btn.active,.tool-btn.active,.browse-sidebar button.active{color:#fff!important;box-shadow:none!important}.mode-group,.tool-group,.goal-progress,.heatmap-panel,.overlay-note-area{background:var(--panel-bg)}option{background:var(--card-bg);color:var(--text)}.root-box{color:var(--warn)}.chinese-display{text-shadow:none}.goal-fill{background:var(--correct)}.mode-btn:hover,.tool-btn:hover{background:var(--elevated)}.hm-cell.lv0{background:var(--border)}.hm-cell.lv1{background:#73956355}.hm-cell.lv2{background:#73956388}.hm-cell.lv3{background:#739563bb}.hm-cell.lv4{background:#739563;box-shadow:none}::selection{background:var(--accent);color:var(--bg)}*{scrollbar-color:var(--border-strong) transparent}::-webkit-scrollbar-thumb{background:var(--border-strong)}button,select{border-radius:7px}.letter-slot.active{animation:none;border-color:var(--accent);box-shadow:0 2px 0 var(--accent)}.browse-sidebar{border-radius:8px;position:sticky;top:20px;max-height:80vh;width:auto}.browse-main{overflow:visible;min-width:0;padding:12px 0 24px 24px}.page-switch{position:static;display:none}#homeLink{display:inline-block}.maple-header~.page-switch{display:none}.maple-empty{max-width:1050px;margin:64px auto 100px}.maple-empty h1{text-align:left;font-size:clamp(36px,6vw,56px);line-height:1.4;margin:20px 0}.maple-empty p{color:var(--text-secondary);line-height:2;font-size:15px}.maple-empty .empty-kicker{color:var(--accent);font-size:11px;letter-spacing:3px}.empty-actions{display:flex;flex-wrap:wrap;gap:16px;margin:28px 0}.maple-link{display:inline-flex;align-items:center;padding:13px 23px;border:1px solid var(--border-strong);border-radius:6px;text-decoration:none;color:var(--text);font-size:14px}.maple-link.primary{background:var(--grad);border:0}.empty-features{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:50px;border-top:1px solid var(--border);padding-top:30px}.empty-features h2{font:22px Georgia,SimSun,serif;margin-bottom:12px}.empty-features p{font-size:13px}.empty-number{display:block;color:var(--accent);font:12px Georgia,serif;margin-bottom:15px}.maple-loading main,.maple-loading .browse-sidebar,.maple-loading .sidebar-toggle{visibility:hidden}.maple-alert{max-width:1000px;margin:30px auto;padding:20px;color:var(--text);border:1px solid var(--border)}.library{max-width:1050px}.library #bookList:empty:after{content:'还没有词书。导入下方文件，开始积累你的词汇。';display:block;padding:20px 0;color:var(--text-secondary)}.maple-header a:focus-visible,.maple-link:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
.container{transition:none;border:1px solid var(--border)}.mode-home{background:transparent;border:0;backdrop-filter:none}.chinese-meaning{text-shadow:none}
@media(max-width:760px){body,body.browse{padding:0 18px 24px}.maple-header{min-height:94px;gap:16px;margin-bottom:26px}.maple-brand{font-size:22px}.maple-brand img{width:27px}.maple-actions{gap:18px}.maple-nav{gap:18px;font-size:12px}.empty-features{grid-template-columns:1fr;gap:25px}.maple-empty{margin:40px auto 60px}.mode-home{margin-top:25px}.mode-cards{gap:16px}.maple-footer{margin-top:35px}.browse-sidebar{position:static;max-height:none;flex-direction:row;flex-wrap:wrap;padding:14px;grid-column:1/-1;border:1px solid var(--border);overflow:visible}.browse-sidebar h2{display:none}.browse-sidebar button{width:auto}.browse-main{grid-column:1/-1;padding:24px 0}body.browse{height:auto}.maple-empty{grid-column:1/-1}.container{padding:20px;min-width:0;width:100%}.user-controls{flex-wrap:wrap}.library-actions{align-items:stretch}.library-actions label{min-width:0;max-width:100%}}
@media(max-width:520px){.maple-header{flex-wrap:wrap;padding:20px 0 15px;gap:12px}.maple-brand img{width:25px}.maple-brand small{font-size:7px}.maple-actions{width:100%;justify-content:space-between}.maple-nav{gap:24px}.maple-empty h1{font-size:38px}.mode-home>h1{font-size:32px}.container{padding:16px}.home-selects{flex-direction:column;align-items:stretch}.today-numbers{gap:10px}.mode-cards{grid-template-columns:1fr}.overlay-content{max-width:100%}}