:root{--bg: #f7f9f8;--surface: #ffffff;--surface-soft: #eef4f1;--ink: #18221f;--muted: #68746f;--line: #d9e2de;--accent: #2b806f;--accent-strong: #11624f;--warm: #d89a45;--shadow: 0 18px 50px rgba(27, 45, 39, .12);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif}:root[data-theme=paper]{--bg: #f6f1e7;--surface: #fffaf1;--surface-soft: #eee4d3;--ink: #231f1a;--muted: #756c5f;--line: #ded2bd}:root[data-theme=dark]{--bg: #141917;--surface: #1d2421;--surface-soft: #25302c;--ink: #e8eee9;--muted: #a4aea8;--line: #35413d;--shadow: 0 18px 50px rgba(0, 0, 0, .35)}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;color:var(--ink);background:var(--bg)}button,input,select{font:inherit}button{color:inherit}.app{min-height:100vh;overflow:hidden}.hidden-input{display:none}.reader-topbar{position:fixed;z-index:20;top:0;left:0;right:0;display:grid;grid-template-columns:46px 1fr auto;align-items:center;gap:10px;height:58px;padding:0 22px;background:color-mix(in srgb,var(--bg) 86%,transparent);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.topbar-title{display:flex;flex-direction:column;min-width:0}.topbar-title span{overflow:hidden;font-size:14px;font-weight:700;text-overflow:ellipsis;white-space:nowrap}.topbar-title small{color:var(--muted);font-size:11px}.topbar-actions{display:flex;gap:8px}.reader-shell{height:100vh;padding-top:58px;padding-bottom:58px}.txt-reader,.epub-scroll-reader{height:100%;overflow:auto;scroll-behavior:smooth}.txt-page,.epub-page{width:min(var(--reader-width),calc(100vw - 40px));margin:0 auto;padding:64px 0 120px;font-family:"Noto Serif SC",Songti SC,SimSun,serif;font-size:var(--reader-font-size);line-height:var(--reader-line-height)}.txt-page h2,.epub-page h1,.epub-page h2,.epub-page h3{margin:0 0 2.4em;font-family:Inter,ui-sans-serif,system-ui,Microsoft YaHei,sans-serif;font-size:clamp(22px,3vw,34px);line-height:1.28;letter-spacing:0}.txt-page p,.epub-page p{margin:0 0 1.1em;text-align:justify;text-indent:2em}.epub-page img,.epub-page svg{display:block;max-width:100%;height:auto;margin:1.6em auto}.epub-page a{color:var(--accent)}.epub-chapter{padding-bottom:3em}.paragraph-space{height:.9em}.icon-button{display:inline-grid;width:36px;height:36px;place-items:center;border:1px solid transparent;border-radius:8px;background:transparent;cursor:pointer}.icon-button:hover{border-color:var(--line);background:var(--surface)}.icon-button:disabled{cursor:not-allowed;opacity:.35}.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:38px;padding:0 14px;border-radius:8px;border:1px solid var(--accent);cursor:pointer;font-size:14px;font-weight:700}.primary-button{color:#fff;background:var(--accent)}.primary-button:hover{background:var(--accent-strong)}.primary-button:disabled{cursor:not-allowed;opacity:.6}.secondary-button{color:var(--ink);background:var(--surface);border-color:var(--line)}.full{width:100%}.bottom-bar{position:fixed;z-index:22;left:50%;bottom:12px;display:grid;grid-template-columns:36px minmax(120px,420px) auto 36px;align-items:center;gap:12px;width:min(640px,calc(100vw - 24px));padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:color-mix(in srgb,var(--surface) 92%,transparent);box-shadow:var(--shadow);transform:translate(-50%);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.progress-track{height:3px;overflow:hidden;border-radius:999px;background:var(--surface-soft)}.progress-track span{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--warm))}.progress-label{color:var(--muted);font-size:12px;white-space:nowrap}.side-drawer,.floating-panel{position:fixed;z-index:30;top:70px;bottom:70px;border:1px solid var(--line);border-radius:8px;background:color-mix(in srgb,var(--surface) 96%,transparent);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.side-drawer{left:18px;width:min(360px,calc(100vw - 36px));padding:16px}.floating-panel{right:18px;width:min(330px,calc(100vw - 36px));padding:16px}.drawer-header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}.search-box{display:grid;grid-template-columns:18px 1fr;align-items:center;gap:8px;margin-bottom:12px;padding:0 10px;border:1px solid var(--line);border-radius:8px;background:var(--surface)}.search-box input,.login-panel input,.settings-panel select{width:100%;min-height:38px;border:0;outline:0;color:var(--ink);background:transparent}.book-list,.toc-list{display:grid;gap:8px;max-height:calc(100% - 116px);margin-top:14px;overflow:auto}.book-row,.toc-list button{width:100%;border:1px solid var(--line);border-radius:8px;background:var(--surface);cursor:pointer;text-align:left}.book-row{display:grid;grid-template-columns:1fr auto;gap:10px;padding:12px}.book-row.active{border-color:var(--accent);background:var(--surface-soft)}.book-row strong,.book-row small{display:block}.book-row small{margin-top:4px;color:var(--muted);font-size:12px}.delete-link{align-self:start;color:var(--muted);font-size:12px}.toc-list button{padding:10px 12px;color:var(--ink)}.settings-panel{bottom:auto}.settings-panel label{display:grid;gap:8px;margin:0 0 16px;color:var(--muted);font-size:13px}.settings-panel input[type=range]{width:100%;accent-color:var(--accent)}.login-page,.empty-reader,.splash{display:grid;min-height:100vh;place-items:center;padding:24px}.login-panel{display:grid;gap:14px;width:min(360px,calc(100vw - 48px));padding:28px;border:1px solid var(--line);border-radius:8px;background:var(--surface);box-shadow:var(--shadow)}.login-panel h1{margin:0;font-size:28px;letter-spacing:0}.login-panel input{padding:0 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg)}.form-error{margin:0;color:#b42318;font-size:13px}.empty-reader{min-height:calc(100vh - 116px);color:var(--muted);text-align:center}.empty-reader h1{margin:16px 0 8px;color:var(--ink);font-size:25px;letter-spacing:0}.empty-reader p{margin:0}.empty-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:20px}.toast{position:fixed;z-index:40;left:50%;bottom:74px;padding:10px 14px;border:1px solid var(--line);border-radius:8px;color:var(--ink);background:var(--surface);box-shadow:var(--shadow);transform:translate(-50%)}@media(max-width:720px){.reader-topbar{padding:0 12px}.topbar-actions{gap:2px}.txt-page{width:min(var(--reader-width),calc(100vw - 28px));padding-top:40px}.bottom-bar{grid-template-columns:34px 1fr auto 34px;gap:8px}.progress-label{display:none}}