@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@400;500;600;700&family=Noto+Sans+SC:wght@400;500;600;700&display=swap');

:root{--blue:#1769c2;--blue-dark:#0e4e94;--ink:#14212b;--muted:#64727b;--line:#d9e2e7;--paper:#fbfcfd;--pale:#eff6fb;--green:#6aaa68;--green-pale:#eaf5e8;--orange:#d98543;--shadow:0 14px 34px rgba(28,61,83,.07)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f6f8f9;color:var(--ink);font-family:'Cairo',system-ui,sans-serif}button,input{font:inherit}.topbar{height:76px;background:var(--blue);color:#f8fbff;display:flex;align-items:center;gap:34px;padding:0 32px;box-shadow:0 2px 14px rgba(10,53,105,.18);position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:11px;color:inherit;text-decoration:none;min-width:280px}.brand-mark{font-family:'Noto Sans SC',sans-serif;font-size:30px;line-height:1;width:38px;height:38px;border:2px solid rgba(255,255,255,.88);display:grid;place-items:center;border-radius:8px}.brand strong{display:block;font-size:19px;letter-spacing:.1px}.brand small{display:block;font-size:11px;color:#c9e0f9;margin-top:-2px}.global-search{height:44px;max-width:510px;flex:1;background:#f7fafc;border:1px solid #c6d7e5;border-radius:9px;display:flex;align-items:center;color:#53636d;padding:0 13px;gap:10px}.global-search>span{font-size:26px;line-height:0;transform:rotate(-15deg)}.global-search input{border:0;outline:0;background:transparent;flex:1;min-width:0;color:var(--ink)}.global-search input::placeholder{color:#84919a}.global-search kbd{border-radius:5px;background:#e6eef3;padding:2px 7px;font-size:12px;color:#53636d}.top-actions{display:flex;align-items:center;gap:9px;font-size:13px;margin-right:auto;white-space:nowrap}.status-dot{width:8px;height:8px;border-radius:50%;background:#b6ef86;box-shadow:0 0 0 4px rgba(182,239,134,.16)}.ghost-button{border:1px solid rgba(255,255,255,.45);background:transparent;color:#fff;border-radius:6px;padding:5px 12px;cursor:pointer}.ghost-button:hover{background:rgba(255,255,255,.12)}.app-shell{display:grid;grid-template-columns:246px minmax(0,1fr) 238px;min-height:calc(100vh - 76px)}.sidebar,.toc{background:var(--paper);padding:28px 22px;border-left:1px solid var(--line)}.sidebar{border-left:0;border-right:1px solid var(--line);direction:rtl}.toc{direction:rtl}.sidebar-heading{display:flex;justify-content:space-between;align-items:center;font-weight:700;font-size:14px;margin:0 0 9px;padding:0 6px}.chevron{color:var(--muted);font-size:18px}.side-nav{display:grid;gap:4px}.nav-item{border:0;background:transparent;color:#53636c;display:flex;align-items:center;gap:9px;text-align:right;padding:10px 10px;border-radius:6px;cursor:pointer;font-size:14px}.nav-item:hover{background:#edf4f8;color:var(--blue)}.nav-item.is-active{background:var(--blue);color:#fff;box-shadow:0 5px 12px rgba(23,105,194,.2)}.nav-item b{margin-right:auto;font-size:11px;font-weight:600;opacity:.75}.nav-icon{width:19px;display:inline-grid;place-items:center;font-size:16px;font-weight:600}.topics-heading{margin-top:31px}.topic-list{display:grid;gap:3px}.topic-button{display:flex;align-items:center;gap:9px;border:0;background:transparent;color:#53636c;padding:8px 10px;text-align:right;border-radius:6px;cursor:pointer;font-size:13px}.topic-button:hover{background:#edf4f8;color:var(--blue)}.topic-count{margin-right:auto;font-size:11px;color:#93a0a7}.topic-dot{width:9px;height:9px;border-radius:50%;background:var(--green)}.sidebar-note{margin-top:45px;background:var(--green-pale);border-radius:8px;padding:12px 11px;display:flex;gap:8px;color:#456a49;font-size:11px;line-height:1.65}.sidebar-note p{margin:0}.note-icon{font-size:16px;color:#4b9555}.main-content{padding:42px 48px 80px;max-width:1250px;width:100%;margin:0 auto}.page-intro{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:34px}.eyebrow{color:var(--blue);font-size:12px;margin:0 0 5px;direction:ltr;text-align:right;font-family:ui-monospace,SFMono-Regular,monospace}.page-intro h1{font-size:36px;line-height:1.15;margin:0 0 8px;letter-spacing:-.5px}.intro-copy{color:var(--muted);font-size:15px;margin:0}.intro-badge{display:flex;align-items:center;gap:9px;color:#5f737c;font-size:12px;margin-top:9px;white-space:nowrap}.pulse{width:8px;height:8px;border-radius:50%;background:var(--green)}.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:13px;margin-bottom:43px}.stat-card{background:#fff;border:1px solid var(--line);border-radius:9px;padding:17px 18px;min-height:116px;box-shadow:var(--shadow)}.stat-primary{border-top:3px solid var(--blue)}.stat-label{display:block;color:var(--muted);font-size:12px;margin-bottom:8px}.stat-card strong{display:block;font-size:28px;line-height:1.1;font-weight:700;color:var(--ink)}.stat-hint{display:block;color:#8a969d;font-size:11px;margin-top:7px}.library-toolbar{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line);padding-bottom:13px;margin-bottom:20px}.library-toolbar h2{font-size:21px;margin:0;display:inline-block}.result-count{font-size:12px;color:#859299;margin-right:10px}.toolbar-actions{display:flex;gap:5px;direction:rtl}.filter-button{border:1px solid transparent;background:transparent;color:#6b7b83;border-radius:5px;padding:7px 11px;cursor:pointer;font-size:12px}.filter-button:hover{color:var(--blue);background:#edf4f8}.filter-button.is-selected{background:#e7f0fa;color:var(--blue);border-color:#cddfee;font-weight:600}.card-list{display:grid;gap:15px}.study-card{background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 8px 22px rgba(36,69,91,.045);overflow:hidden;display:grid;grid-template-columns:1fr 210px;direction:ltr;transition:transform .18s ease,box-shadow .18s ease}.study-card:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(36,69,91,.09)}.card-main{padding:21px 24px;direction:rtl}.card-meta{display:flex;align-items:center;gap:7px;color:#7b8b92;font-size:11px;margin-bottom:13px}.card-number{color:var(--blue);font-family:ui-monospace,SFMono-Regular,monospace;font-weight:700}.card-tag{background:var(--green-pale);color:#4d8652;border-radius:4px;padding:3px 8px}.card-date{margin-right:auto}.chinese{font-family:'Noto Sans SC','Cairo',sans-serif;font-size:28px;line-height:1.45;letter-spacing:.01em;margin:0 0 10px;color:#122b20;overflow-wrap:anywhere}.pinyin{font-family:ui-sans-serif,system-ui,sans-serif;color:#487451;font-size:16px;line-height:1.6;border-top:1px solid #e5ede7;padding-top:10px;direction:ltr;text-align:right;overflow-wrap:anywhere}.meaning{font-size:15px;line-height:1.85;margin:9px 0 0;color:#273b45}.new-words{display:flex;flex-wrap:wrap;gap:6px;margin-top:13px;padding-top:12px;border-top:1px dashed #dce6ea}.word-chip{display:inline-flex;gap:5px;align-items:center;background:#f2f6f8;border:1px solid #e1e8eb;border-radius:4px;padding:4px 7px;font-size:11px;color:#52646d;direction:ltr}.word-chip strong{font-family:'Noto Sans SC';color:#224433;font-weight:600}.card-audio{background:#f5f9fb;border-right:1px solid var(--line);padding:19px;display:flex;flex-direction:column;justify-content:space-between;align-items:stretch;direction:rtl}.audio-label{font-size:11px;color:#76858c;display:flex;gap:7px;align-items:center}.audio-wave{height:42px;display:flex;align-items:center;justify-content:center;gap:3px;direction:ltr}.audio-wave i{display:block;width:3px;border-radius:4px;background:#9ecaa0}.audio-wave i:nth-child(1),.audio-wave i:nth-child(7){height:12px}.audio-wave i:nth-child(2),.audio-wave i:nth-child(6){height:22px}.audio-wave i:nth-child(3),.audio-wave i:nth-child(5){height:31px}.audio-wave i:nth-child(4){height:39px;background:var(--blue)}.audio-buttons{display:flex;gap:6px}.play-button{border:1px solid #c8d8e1;background:#fff;color:var(--blue);border-radius:5px;cursor:pointer;padding:7px 8px;font-size:11px;flex:1}.play-button:hover{background:#eaf3fb}.play-button:disabled{color:#a7b2b7;cursor:not-allowed;background:#f0f3f4}.review-status{font-size:11px;color:#7d8c92}.empty-state{text-align:center;padding:74px 20px;color:var(--muted)}.empty-state span{font-size:40px;color:#a5cba7}.empty-state h3{margin:5px 0;font-size:18px;color:var(--ink)}.empty-state p{margin:0;font-size:13px}.toc{border-right:1px solid var(--line);border-left:0;padding-top:30px}.toc-title{font-weight:700;font-size:16px;margin-bottom:16px}.toc a{display:block;color:#67777e;text-decoration:none;padding:7px 0;font-size:13px}.toc a:hover{color:var(--blue)}.toc-rule{border-top:1px solid var(--line);margin:23px 0 19px}.toc-caption{display:block;color:#9aa6ab;font-size:11px}.toc-value{display:block;color:#52636c;font-family:ui-monospace,SFMono-Regular,monospace;font-size:11px;margin-top:5px;direction:ltr;text-align:right}
@media (max-width:1180px){.app-shell{grid-template-columns:220px minmax(0,1fr)}.toc{display:none}.main-content{padding:36px 32px}.brand{min-width:230px}.topbar{gap:20px}.stats-row{gap:10px}}
@media (max-width:820px){.topbar{height:auto;min-height:68px;flex-wrap:wrap;padding:12px 18px;gap:12px}.brand{min-width:0;flex:1}.global-search{order:3;flex-basis:100%;max-width:none}.top-actions{margin-right:0}.app-shell{display:block}.sidebar{display:none}.main-content{padding:30px 18px 60px}.page-intro{display:block}.intro-badge{margin-top:14px}.stats-row{grid-template-columns:repeat(2,1fr);margin-bottom:30px}.study-card{grid-template-columns:1fr}.card-audio{border-right:0;border-top:1px solid var(--line);padding:13px 18px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px}.audio-wave{height:32px}.audio-buttons{min-width:130px}.review-status{display:none}.library-toolbar{align-items:flex-start;flex-direction:column}.toolbar-actions{width:100%;overflow:auto}.filter-button{white-space:nowrap}}
@media (max-width:480px){.brand strong{font-size:16px}.brand small{font-size:10px}.top-actions{font-size:11px}.page-intro h1{font-size:30px}.stats-row{gap:8px}.stat-card{min-height:103px;padding:13px}.stat-card strong{font-size:24px}.chinese{font-size:24px}.card-main{padding:17px}.card-audio{grid-template-columns:1fr;gap:8px}.audio-buttons{width:100%}}
.filter-select{border:1px solid #cddce4;background:#fff;color:#5f7079;border-radius:5px;padding:6px 8px;font-size:12px}.export-button{color:var(--blue);border-color:#cddfee;background:#f5f9fd}.status-page{min-height:100vh;background:#f6f8f9}.status-wrap{max-width:820px;margin:0 auto;padding:56px 24px}.back-link{display:inline-block;color:var(--blue);text-decoration:none;font-size:13px;margin-bottom:40px}.status-wrap h1{font-size:36px;margin:0 0 8px}.status-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:32px 0 22px}.status-item{display:flex;align-items:flex-start;gap:13px;background:#fff;border:1px solid var(--line);border-radius:9px;padding:20px;box-shadow:var(--shadow)}.status-item h2{font-size:16px;margin:0 0 5px}.status-item p{font-size:13px;margin:0}.status-ok{color:#4f8c56}.status-bad-text{color:#b6634e}.status-bad{background:#d77b63;box-shadow:0 0 0 4px rgba(215,123,99,.13)}.primary-button{border:0;background:var(--blue);color:#fff;border-radius:6px;padding:10px 17px;cursor:pointer}.status-time{color:#87959b;font-size:12px;margin-top:15px}@media (max-width:820px){.status-grid{grid-template-columns:1fr}.toolbar-actions{flex-wrap:wrap}.filter-select{flex:1;min-width:130px}.export-button{flex:0 0 auto}}
.nav-link{text-decoration:none}.new-words-summary{grid-template-columns:repeat(2,minmax(0,260px));margin-bottom:31px}.summary-symbol{font-size:32px!important;color:var(--blue)!important}.word-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(205px,1fr));gap:13px;direction:rtl}.word-card{background:#fff;border:1px solid var(--line);border-top:3px solid #8fc594;border-radius:9px;padding:15px 16px 14px;min-height:190px;box-shadow:0 8px 22px rgba(36,69,91,.045);transition:transform .18s ease,box-shadow .18s ease}.word-card:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(36,69,91,.09)}.word-card-meta{display:flex;align-items:center;gap:7px;color:#6e7e85;font-size:10px}.word-index{color:var(--blue);font-family:ui-monospace,SFMono-Regular,monospace;font-weight:700}.word-date{margin-right:auto;color:#9aa6ab}.word-hanzi{font-family:'Noto Sans SC','Cairo',sans-serif;font-size:30px;line-height:1.35;color:#122b20;margin:17px 0 8px;overflow-wrap:anywhere}.word-pinyin{border-top:1px solid #e5ede7;padding-top:9px;color:#487451;font-size:16px;direction:ltr;text-align:right;overflow-wrap:anywhere}.word-meaning{font-size:14px;line-height:1.7;color:#273b45;margin:9px 0 10px;min-height:24px}.word-source{border-top:1px dashed #dce6ea;padding-top:8px;color:#8b999f;font-size:10px}.empty-state{grid-column:1/-1}@media (max-width:820px){.new-words-summary{grid-template-columns:repeat(2,1fr)}.word-grid{grid-template-columns:repeat(auto-fill,minmax(170px,1fr))}}@media (max-width:480px){.new-words-summary{grid-template-columns:1fr 1fr}.word-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.word-card{padding:12px 11px;min-height:170px}.word-hanzi{font-size:25px}}
.word-audio{border:1px solid #c8d8e1;background:#f5f9fd;color:var(--blue);border-radius:5px;cursor:pointer;padding:6px 8px;font-size:11px;margin:1px 0 9px}.word-audio:hover{background:#eaf3fb}.muted-audio{display:inline-block;color:#a0acb1;background:#f3f5f6;border-color:#e3e8ea;cursor:default}
.brand-logo{width:40px;height:40px;border-radius:9px;object-fit:cover;display:block}.mobile-nav-toggle{display:none;border:1px solid rgba(255,255,255,.5);background:transparent;color:#fff;border-radius:6px;width:38px;height:36px;font-size:20px;cursor:pointer}.mobile-nav-toggle:focus-visible{outline:3px solid #b6ef86;outline-offset:2px}.remember-panel{min-width:0}.remember-panel .remember-intro h2{font-size:25px;margin:0 0 8px}.remember-panel .remember-toolbar{margin-top:22px}.remember-panel .remember-grid{margin-top:20px}
@media (max-width:820px){.mobile-nav-toggle{display:block;flex:0 0 auto}.topbar{gap:10px}.brand-logo{width:36px;height:36px}.brand{gap:8px}.sidebar{display:block;position:fixed;z-index:20;top:0;right:0;width:min(78vw,290px);height:100dvh;padding:92px 18px 24px;box-shadow:-14px 0 30px rgba(20,48,68,.16);transform:translateX(105%);transition:transform .2s ease;overflow:auto}.sidebar.is-open{transform:translateX(0)}body.nav-open::after{content:'';position:fixed;inset:0;background:rgba(20,33,43,.28);z-index:15}.app-shell{display:block}.main-content{padding:30px 18px 60px}.remember-panel .remember-intro{align-items:flex-start;flex-direction:column}.remember-panel .remember-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.remember-panel .remember-card-body{padding:11px 12px}.remember-panel .remember-card h2{font-size:22px}.remember-panel .remember-audio-side{min-width:68px}.remember-panel .remember-audio-button{font-size:9px;padding:4px 5px}}
@media (max-width:460px){.remember-panel .remember-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.remember-panel .remember-card h2{font-size:19px}.remember-panel .remember-pinyin{font-size:13px}.remember-panel .remember-meaning{font-size:12px}.remember-panel .remember-card-body{padding:9px}.remember-panel .remember-card-meta{font-size:9px}}