:root{--bg:#fafaf8;--text:#262824;--muted:#797c75;--line:#e6e7e1;--accent:#294d3c;--soft:#f0f1ec;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;color:var(--text);background:var(--bg);font-size:16px}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit;color:inherit}button{border:0;background:none;cursor:pointer}button:hover,summary:hover{background:var(--soft)}button:disabled{opacity:.4;cursor:wait}a{color:inherit}h1,h2,h3,p{margin:0}p{line-height:1.85}button,summary,select{-webkit-tap-highlight-color:transparent}button,summary{touch-action:manipulation}textarea,input,select{max-width:100%}:focus-visible{outline:2px solid #768e79;outline-offset:3px}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.skip-link{position:fixed;top:-100px;background:white;padding:12px;z-index:60}.skip-link:focus{top:10px}main{height:100dvh;display:flex;flex-direction:column}.topbar{height:64px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;padding:0 22px;background:var(--bg)}.header-left,.header-right{display:flex;align-items:center;gap:12px}.wordmark{font-size:18px;font-weight:550;padding:8px;border-radius:8px}.icon-button{height:40px;width:40px;display:inline-grid;place-items:center;border-radius:9px;font-size:23px;color:#62665e}.quiet-button{font-size:14px;padding:10px 12px;border-radius:8px;color:#646b60}.header-right{gap:6px}#notes-badge{font-size:12px;color:var(--muted)}#learn{min-height:0;flex:1;display:flex;flex-direction:column}.learning-layout,.chat-panel{flex:1;min-height:0;display:flex;flex-direction:column}#messages{overflow:auto;flex:1;min-height:0;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#d3d6cd transparent;padding:20px max(24px,calc((100% - 748px)/2)) 28px}.message{margin:0 auto 28px;max-width:748px}.message strong{display:block;font-size:12px;color:var(--muted);font-weight:400;margin-bottom:12px}.message div{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.95;font-size:16px}.message.user{margin-left:auto;width:fit-content;max-width:min(85%,660px);padding:13px 19px;background:var(--soft);border-radius:18px 18px 4px 18px}.message.user strong{display:none}.message.user div{line-height:1.8}.message.assistant{padding:7px 0 14px}#chat-form{flex-shrink:0;width:calc(100% - 48px);max-width:748px;margin:0 auto;border:1px solid #dddfd6;border-radius:22px;background:#fff;box-shadow:0 3px 14px #1b2b1705}#chat-form:focus-within{border-color:#acb9a7;box-shadow:0 3px 14px #1b2b1707}#chat-input{display:block;width:100%;background:none;border:0;outline:none;resize:none;padding:20px 22px 7px;min-height:80px;max-height:180px;font-size:16px;line-height:1.7}#chat-input::placeholder{color:#94988e}.composer-bottom{display:flex;align-items:center;gap:12px;padding:8px 12px 12px 18px}.send-button{margin-left:auto;width:36px;height:36px;border-radius:50%;background:var(--accent);color:white;display:grid;place-items:center;font-size:23px}.send-button:hover{background:#3d604a}.keyboard-hint{display:none}.chat-footnote{width:calc(100% - 48px);max-width:748px;min-height:34px;margin:0 auto;padding:7px 0 10px;text-align:center;color:var(--muted);font-size:12px;line-height:1.6;flex-shrink:0}#chat-status:empty{display:none}.chat-empty{text-align:center;padding:0 20px 26px}.chat-empty h1{font-size:28px;font-weight:500;letter-spacing:.2px}.is-empty .chat-panel{justify-content:center;padding-bottom:min(15vh,130px)}.is-empty #messages{flex:0 0 auto;overflow:visible;padding:0}.is-empty .chat-footnote{min-height:32px}
.model-settings{position:relative}.model-settings summary{list-style:none;display:flex;align-items:center;gap:7px;padding:7px 5px;border-radius:6px;font-size:13px;cursor:pointer}.model-settings summary::-webkit-details-marker{display:none}.model-dot{display:none}#settings-summary{display:flex;align-items:center;gap:10px}#settings-summary>span{font-size:12px;color:var(--muted)}.settings-chevron{color:var(--muted);font-size:14px}.settings-popover{position:absolute;bottom:calc(100% + 12px);left:0;z-index:10;width:320px;background:white;border:1px solid var(--line);padding:20px;border-radius:14px;box-shadow:0 10px 45px #1e28121a}.settings-heading{font-size:14px;margin-bottom:16px}.ai-options{display:grid;gap:12px}.ai-options label{display:grid;grid-template-columns:72px 1fr;gap:10px;align-items:center;font-size:13px;color:var(--muted)}select{border:1px solid var(--line);background:white;padding:9px 8px;border-radius:6px;font-size:14px;min-width:0;width:100%}.ai-settings-note{font-size:12px;color:var(--muted);margin-top:14px}
dialog{border:0;padding:0;background:var(--bg);color:var(--text);max-height:100dvh;outline:none}dialog::backdrop{background:#171d162b;backdrop-filter:blur(2px)}.navigation-dialog{margin:0 auto 0 0;width:300px;max-width:90vw;height:100dvh;border-right:1px solid var(--line)}.sidebar{height:100%;padding:16px 16px 24px;display:flex;flex-direction:column}.drawer-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:23px}.drawer-heading h2{font-size:16px;font-weight:500}.drawer-heading .icon-button{flex-shrink:0;font-size:25px}nav{display:flex;flex-direction:column;gap:4px}.nav{display:flex;align-items:center;justify-content:space-between;padding:13px 14px;border-radius:8px;text-align:left;font-size:14px}.nav.active{background:#e9ede4}.nav-count{font-size:12px;color:var(--muted)}.history{border-top:1px solid var(--line);margin-top:25px;padding-top:24px}.history label{display:block;font-size:12px;color:var(--muted);margin-bottom:12px}.history select{font-size:13px;padding:12px}.side-bottom{margin-top:auto;font-size:13px;display:flex;align-items:center;padding:24px 10px 0;color:#697063}.side-bottom small{display:block;font-size:12px;color:var(--muted);margin-top:7px}.avatar,.status-dot{display:none}.notes-dialog{margin:0 0 0 auto;width:430px;max-width:95vw;height:100dvh;border-left:1px solid var(--line)}.extracted-panel{padding:18px 24px 25px}.extracted-panel .drawer-heading{position:sticky;top:0;background:var(--bg);padding:4px 0 12px;margin-bottom:0;z-index:1}#extracted-count{display:block;font-size:12px;font-weight:400;color:var(--muted);margin-top:6px}.extracted-card,.list-card{border-bottom:1px solid var(--line);padding:22px 0}.extracted-card>span,.list-card>span{font-size:12px;color:var(--muted)}.extracted-card h3,.list-card h3{font-size:16px;line-height:1.8;font-weight:500;margin:9px 0 16px}details>summary{cursor:pointer;font-size:14px;color:#5e675a;padding:6px 0}details p{font-size:14px;white-space:pre-wrap;overflow-wrap:anywhere;margin-top:12px}.card-reason{font-size:12px;color:var(--muted);margin-top:14px}.text-button{font-size:13px;color:#67745f;padding:10px 0;text-align:left;border-radius:5px}.text-button:hover{text-decoration:underline;background:none}.empty-extracted{padding:35px 0;color:var(--muted);font-size:14px}.notebook-action{padding:24px 0}.primary:not(.send-button){display:inline-flex;align-items:center;justify-content:center;gap:12px;border-radius:9px;background:var(--accent);color:white;padding:12px 19px;font-size:14px;min-height:42px}.primary:hover:not(.send-button){background:#3d604a}.privacy-note{border-top:1px solid var(--line);padding-top:15px;color:var(--muted)}.privacy-note summary{font-size:12px;display:flex;justify-content:space-between}.privacy-note p{font-size:12px}
.view:not(#learn){overflow:auto;width:100%;max-width:800px;margin:0 auto;padding:24px 26px 50px}.page-heading{margin:8px 0 30px}.page-heading h1{font-size:26px;font-weight:500}.page-heading p{font-size:14px;color:var(--muted);margin-top:12px}.page-note{display:none}.review-stats{margin-bottom:22px}.review-stats>summary{font-size:13px}.stats{display:flex;gap:28px;padding:18px 0;border-bottom:1px solid var(--line);font-size:12px;color:var(--muted)}.stats>div{flex:1}.stats strong{display:block;font-size:26px;font-weight:400;color:var(--text);margin-top:10px}.stats small{font-size:12px;font-weight:400}.stat-bottom{font-size:12px;margin-top:10px}.section-title{display:none}.card{padding:25px 0}.card-top{display:flex;justify-content:space-between;gap:20px;font-size:12px;color:var(--muted)}.question-label{font-size:13px;color:var(--muted);margin-top:35px}#question{font-size:23px;font-weight:500;line-height:1.9;margin:14px 0 24px}#answer{font-size:16px;line-height:1.9;white-space:pre-wrap;border-top:1px solid var(--line);padding-top:22px}.card-footer{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:32px}#hint{font-size:13px;line-height:1.7;color:var(--muted)}#rating{border-top:1px solid var(--line);margin-top:25px;padding-top:20px}.rating-buttons{display:flex;gap:10px;margin-top:12px}.rating-buttons button{flex:1;border:1px solid var(--line);padding:14px 8px;border-radius:8px;font-size:14px}.rating-buttons small{display:block;font-size:12px;color:var(--muted);margin-top:8px}.under-card{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted);border-top:1px solid var(--line);padding-top:10px}#feedback{font-size:13px;color:var(--muted);line-height:1.8}.manual-card{border:1px solid var(--line);padding:10px 18px;border-radius:10px;margin-bottom:30px}.manual-card summary{display:flex;justify-content:space-between;gap:10px}.manual-card summary span:last-child{font-size:12px;color:var(--muted)}#card-form{display:grid;gap:18px;padding:22px 0 8px}#card-form label{display:grid;gap:10px;font-size:14px}#card-form input,#card-form textarea{width:100%;border:1px solid var(--line);border-radius:7px;padding:12px;background:white;font-size:16px;line-height:1.8}#card-form button{justify-self:start}.collection-heading{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted)}.collection-heading h2{font-size:14px;font-weight:500}.collection-empty{padding:50px 0;color:var(--muted)}.collection-empty h3{font-size:18px;font-weight:400;margin-bottom:12px}.collection-empty p{font-size:14px}.method-grid{display:grid;gap:35px}.method-grid article{border-bottom:1px solid var(--line);padding-bottom:28px}.method-number{float:right;font-size:13px;color:var(--muted)}.method-grid h2{font-size:20px;font-weight:500;margin-bottom:18px}.method-grid p{font-size:16px;color:#61665c}.try-this{margin-top:22px}.try-this strong{font-size:13px;font-weight:500}.try-this p{margin-top:8px;font-size:14px}.rhythm{margin-bottom:35px;padding-bottom:25px;border-bottom:1px solid var(--line)}.rhythm>p,.rhythm-note{font-size:14px;color:var(--muted);line-height:1.9}.timeline{display:grid;grid-template-columns:1fr 1fr;gap:23px;margin:24px 0}.step{display:flex;gap:13px}.step>span{font-size:12px;color:var(--muted)}.step strong{font-size:14px;font-weight:500}.step small{display:block;margin-top:8px;font-size:12px;color:var(--muted)}.source-note{font-size:12px;color:var(--muted);margin-top:30px}
@media(max-width:600px){.topbar{height:56px;padding:0 10px}.header-left{gap:3px}.wordmark{font-size:17px}.quiet-button{font-size:13px}#messages{padding:18px 20px 20px}.message.user{max-width:90%;padding:12px 16px}.message div{font-size:16px;line-height:1.85}.message strong{font-size:12px}#chat-form{width:calc(100% - 24px);border-radius:19px}#chat-input{padding:16px 17px 6px;min-height:76px}.composer-bottom{padding:6px 10px 10px 12px;gap:4px}#settings-summary{gap:7px}#settings-summary>span{font-size:12px}.model-settings summary{font-size:12px;gap:4px}.settings-popover{width:min(320px,calc(100vw - 52px));padding:17px}.ai-options select{font-size:16px}.chat-footnote{font-size:12px;min-height:calc(26px + env(safe-area-inset-bottom));padding-bottom:calc(7px + env(safe-area-inset-bottom))}.chat-empty h1{font-size:24px}.chat-empty{padding-bottom:23px}.is-empty .chat-panel{padding-bottom:16vh}.is-empty .settings-popover{bottom:auto;top:calc(100% + 15px)}.view:not(#learn){padding:23px 21px 45px}.page-heading h1{font-size:24px}.extracted-panel{padding:14px 20px}.card-footer{flex-direction:column;align-items:flex-start}.rating-buttons{gap:7px}.rating-buttons button{font-size:13px}.rating-buttons small{font-size:11px}.stats{gap:14px}.stat-bottom{display:none}.manual-card summary span:last-child{display:none}.under-card>span{display:none}.timeline{gap:23px 16px}}
@media(max-width:370px){#settings-summary>span{display:none}.settings-popover{max-width:calc(100vw - 48px)}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
.delivery-status{display:block;text-align:right;font-size:12px;line-height:1.6;color:var(--muted);margin-top:7px}.reply-progress{font-size:13px;color:var(--muted);margin-top:12px;display:flex;align-items:center;gap:12px;line-height:1.8}.reply-progress.thinking:before{content:'';width:7px;height:7px;background:#799179;border-radius:50%;animation:breathe 1.5s ease-in-out infinite;flex-shrink:0}.streaming .stream-content:after{content:'▍';font-size:14px;color:#7b8d73;animation:breathe 1s infinite}.retry-message{padding:2px 7px;white-space:nowrap;color:var(--accent);text-decoration:underline}.pending-reply{min-height:72px}@keyframes breathe{0%,100%{opacity:.35}50%{opacity:1}}@media(prefers-reduced-motion:reduce){.reply-progress.thinking:before,.streaming .stream-content:after{animation:none}}