:root{--reader-font-size: 19px;--reader-line-height: 1.9;--paper-bg: #faf6ef;--paper-surface: #ffffff;--paper-text: #2b2620;--paper-muted: #7a7268;--paper-border: #eae3d8;--accent: #2563eb;--accent-soft: #e8effd;--danger: #d64545;--success: #2f9e63;--warm: #f4a72c}:root[data-theme=night]{--paper-bg: #161513;--paper-surface: #1f1d1a;--paper-text: #e8e2d6;--paper-muted: #948b7d;--paper-border: #302c27;--accent: #6ea8fe;--accent-soft: #1e2b44;--danger: #ef6b6b;--success: #56c98a}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--paper-bg);color:var(--paper-text);-webkit-font-smoothing:antialiased;transition:background .3s ease,color .3s ease}button{font-family:inherit;cursor:pointer}input,textarea{font-family:inherit}.app-shell{min-height:100%;display:flex;flex-direction:column}.app-main{flex:1;padding:20px 16px calc(84px + env(safe-area-inset-bottom));max-width:860px;margin:0 auto;width:100%}.tabbar{position:fixed;left:0;right:0;bottom:0;display:flex;align-items:center;justify-content:space-around;gap:4px;padding:6px 8px calc(6px + env(safe-area-inset-bottom));background:color-mix(in srgb,var(--paper-surface) 92%,transparent);backdrop-filter:blur(14px);border-top:1px solid var(--paper-border);z-index:50}.tab{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 0;text-decoration:none;color:var(--paper-muted);font-size:11px;border-radius:12px}.tab.active{color:var(--accent)}.tab-icon{font-size:20px;line-height:1}.tab-import{flex:0 0 auto;width:54px;height:54px;margin-top:-26px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;text-decoration:none;box-shadow:0 6px 18px #2563eb59}.tab-import-icon{font-size:30px;line-height:1;font-weight:300}.page-title{font-size:26px;font-weight:700;margin:6px 0 18px;letter-spacing:.01em}.section-title{font-size:15px;font-weight:600;color:var(--paper-muted);margin:24px 0 10px}.card{background:var(--paper-surface);border:1px solid var(--paper-border);border-radius:16px;padding:18px;margin-bottom:14px}.btn{border:none;border-radius:12px;padding:12px 18px;font-size:15px;font-weight:600;background:var(--accent);color:#fff;transition:transform .1s ease,opacity .2s ease}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.5;cursor:default}.btn.ghost{background:transparent;color:var(--accent);border:1px solid var(--paper-border)}.btn.subtle{background:var(--accent-soft);color:var(--accent)}.btn.danger{background:transparent;color:var(--danger);border:1px solid var(--paper-border)}.row{display:flex;align-items:center;gap:12px}.spread{justify-content:space-between}.muted{color:var(--paper-muted)}.small{font-size:13px}.empty{text-align:center;color:var(--paper-muted);padding:48px 20px;line-height:1.7}.empty-emoji{font-size:40px;display:block;margin-bottom:12px}.progress-bar{height:8px;border-radius:999px;background:var(--paper-border);overflow:hidden}.progress-bar>span{display:block;height:100%;background:var(--accent);border-radius:999px;transition:width .4s ease}.visually-hidden{display:none}input[type=text],input[type=url],textarea{width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--paper-border);background:var(--paper-surface);color:var(--paper-text);font-size:16px;outline:none}input[type=text]:focus,input[type=url]:focus,textarea:focus{border-color:var(--accent)}textarea{resize:vertical;line-height:1.6}.seg{display:inline-flex;background:var(--paper-border);border-radius:10px;padding:3px;gap:2px}.seg button{border:none;background:transparent;color:var(--paper-muted);padding:7px 14px;border-radius:8px;font-size:14px;font-weight:600}.seg button.active{background:var(--paper-surface);color:var(--accent)}.reader{max-width:720px;margin:0 auto;padding:0 20px 120px}.reader-topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:8px;padding:10px 14px;background:color-mix(in srgb,var(--paper-bg) 88%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--paper-border)}.reader-topbar .title{flex:1;font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.icon-btn{border:none;background:transparent;color:var(--paper-text);font-size:18px;width:38px;height:38px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center}.icon-btn:hover{background:var(--paper-border)}.reader-title{font-size:30px;line-height:1.3;font-weight:700;margin:26px 0 8px}.reader-meta{color:var(--paper-muted);font-size:13px;margin-bottom:26px}.paragraph{font-family:Georgia,Times New Roman,Songti SC,"Noto Serif",serif;font-size:var(--reader-font-size);line-height:var(--reader-line-height);margin:0 0 1.1em;letter-spacing:.003em;text-align:left;word-break:normal;overflow-wrap:break-word}.sentence{cursor:pointer;border-radius:4px;transition:background .15s ease;padding:0 1px;-webkit-tap-highlight-color:transparent}.sentence:hover{background:color-mix(in srgb,var(--accent) 8%,transparent)}.sentence.selected{background:var(--accent-soft)}.inline-translation{display:block;margin:8px 0 2px;padding:10px 14px;border-left:3px solid var(--accent);background:var(--accent-soft);border-radius:0 10px 10px 0;font-size:16px;line-height:1.7;color:var(--paper-text);animation:fadeIn .2s ease}.inline-translation .loading{color:var(--paper-muted)}.skeleton-lines{display:flex;flex-direction:column;gap:6px}.skeleton{display:block;height:12px;border-radius:6px;background:linear-gradient(90deg,var(--paper-border) 25%,color-mix(in srgb,var(--paper-border) 55%,var(--paper-surface)) 37%,var(--paper-border) 63%);background-size:400% 100%;animation:shimmer 1.3s ease infinite}.skeleton.short{width:60%}@keyframes shimmer{0%{background-position:100% 50%}to{background-position:0 50%}}.inline-translation .actions{margin-top:8px;display:flex;gap:8px}.mini-btn{border:1px solid var(--paper-border);background:var(--paper-surface);color:var(--paper-muted);border-radius:8px;padding:4px 10px;font-size:12px}.mini-btn.on{color:var(--accent);border-color:var(--accent)}@keyframes fadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.selection-bar{position:fixed;left:50%;bottom:calc(84px + env(safe-area-inset-bottom));transform:translate(-50%);display:flex;align-items:center;gap:10px;max-width:92vw;padding:8px 10px 8px 16px;background:var(--paper-surface);border:1px solid var(--paper-border);border-radius:999px;box-shadow:0 8px 24px #00000029;z-index:60}.selection-bar .sel-text{font-size:14px;max-width:40vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.reader-toolbar{position:fixed;right:16px;bottom:calc(28px + env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:10px;z-index:30}.fab{width:46px;height:46px;border-radius:50%;border:1px solid var(--paper-border);background:var(--paper-surface);color:var(--paper-text);font-size:18px;box-shadow:0 4px 14px #0000001f}.settings-panel{position:fixed;right:16px;bottom:calc(84px + env(safe-area-inset-bottom));width:260px;background:var(--paper-surface);border:1px solid var(--paper-border);border-radius:16px;padding:16px;box-shadow:0 10px 30px #0000002e;z-index:40}.settings-panel label{display:block;font-size:13px;color:var(--paper-muted);margin:12px 0 4px}.drawer{border:1px solid var(--paper-border);border-radius:14px;margin-bottom:22px;overflow:hidden}.drawer summary{cursor:pointer;padding:14px 16px;font-weight:600;font-size:15px;list-style:none;display:flex;justify-content:space-between;align-items:center;background:var(--paper-surface)}.drawer summary::-webkit-details-marker{display:none}.drawer .drawer-body{padding:4px 16px 16px;background:var(--paper-surface)}.key-point{display:flex;gap:10px;margin:10px 0;line-height:1.6}.key-point .idx{flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}.recap-card{margin-top:40px;border:1px solid var(--paper-border);border-radius:18px;padding:22px;background:var(--paper-surface)}.summary-input{margin-top:12px}.practice-wrap{max-width:640px;margin:0 auto}.practice-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.streak-flame{font-size:15px;font-weight:700;color:var(--warm)}.question-card{background:var(--paper-surface);border:1px solid var(--paper-border);border-radius:20px;padding:26px 22px;min-height:300px;display:flex;flex-direction:column}.question-type{font-size:12px;color:var(--paper-muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:10px}.question-prompt{font-size:22px;font-weight:600;line-height:1.5;margin-bottom:8px}.question-hint{color:var(--paper-muted);margin-bottom:20px}.options{display:flex;flex-direction:column;gap:10px;margin-top:auto}.option{border:2px solid var(--paper-border);background:var(--paper-surface);color:var(--paper-text);border-radius:14px;padding:15px 18px;font-size:16px;text-align:left;transition:all .15s ease}.option.correct{border-color:var(--success);background:color-mix(in srgb,var(--success) 14%,transparent)}.option.wrong{border-color:var(--danger);background:color-mix(in srgb,var(--danger) 14%,transparent)}.feedback{margin-top:18px;padding:14px 16px;border-radius:12px;line-height:1.6;animation:fadeIn .2s ease}.feedback.ok{background:color-mix(in srgb,var(--success) 12%,transparent)}.feedback.no{background:color-mix(in srgb,var(--danger) 12%,transparent)}.combo{color:var(--warm);font-weight:700}.article-item{display:block;text-decoration:none;color:inherit;background:var(--paper-surface);border:1px solid var(--paper-border);border-radius:14px;padding:16px;margin-bottom:12px}.article-item h3{margin:0 0 6px;font-size:17px}.fav-item{background:var(--paper-surface);border:1px solid var(--paper-border);border-radius:14px;padding:16px;margin-bottom:12px}.fav-item .content{font-size:17px;line-height:1.6;margin-bottom:6px}.fav-item .trans{color:var(--paper-muted);line-height:1.6;margin-bottom:8px}.chip{display:inline-block;font-size:12px;padding:3px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent);margin-right:6px}.checkin-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;margin:12px 0}.checkin-cell{aspect-ratio:1;border-radius:8px;background:var(--paper-border);display:flex;align-items:center;justify-content:center;font-size:10px;color:var(--paper-muted)}.checkin-cell.done{background:var(--success);color:#fff}.toast{position:fixed;left:50%;bottom:calc(96px + env(safe-area-inset-bottom));transform:translate(-50%);background:#23201b;color:#fff;padding:10px 18px;border-radius:999px;font-size:14px;z-index:100;animation:fadeIn .2s ease}@media(min-width:760px){.app-main{padding-top:32px}.tabbar{max-width:560px;left:50%;transform:translate(-50%);border-radius:20px 20px 0 0}}