:root{--background:#f6f7f9;--foreground:#162029;--muted:#607080;--panel:#fff;--panel-soft:#eef3f6;--line:#d8e0e7;--accent:#0b6f6a;--accent-strong:#09534f;--accent-soft:#d9f0ed;--danger:#b42318;--shadow:0 18px 48px #1c2a361f}*{box-sizing:border-box}html,body{height:100%}body{background:var(--background);color:var(--foreground);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,select{font:inherit}button{cursor:pointer}.shell{grid-template-columns:minmax(280px,360px) minmax(0,1fr);height:100vh;transition:grid-template-columns .18s;display:grid;overflow:hidden}.shell.sidebar-collapsed{grid-template-columns:72px minmax(0,1fr)}.sidebar{color:#f7fbfc;background:#162029;flex-direction:column;gap:24px;min-width:0;min-height:0;padding:28px;display:flex;position:relative;overflow:auto}.sidebar-toggle{color:#f7fbfc;background:#ffffff14;border:1px solid #ffffff29;border-radius:8px;place-items:center;width:38px;height:38px;display:grid;position:absolute;top:16px;right:16px}.sidebar-content{display:contents}.sidebar-collapsed .sidebar{align-items:center;padding:16px;overflow:hidden}.sidebar-collapsed .brand{margin-top:52px}.sidebar-collapsed .brand div:last-child,.sidebar-collapsed .sidebar-content{display:none}.brand{align-items:center;gap:12px;display:flex}.brand-mark{color:#162029;background:#d6b45a;border-radius:8px;place-items:center;width:42px;height:42px;display:grid}.brand h1{margin:0;font-size:1.3rem}.brand p{color:#b9c6cf;margin:2px 0 0;font-size:.9rem}.upload-box{background:#ffffff0f;border:1px dashed #ffffff57;border-radius:8px;gap:14px;padding:18px;display:grid}.upload-box.loading{background:#d6b45a1f;border-color:#d6b45a}.upload-message{color:#dce6eb;font-size:.86rem;font-weight:700}.auth-box,.account-box,.library-list{gap:10px;display:grid}.auth-box input{color:#f7fbfc;background:#26333d;border:1px solid #ffffff2e;border-radius:6px;min-height:40px;padding:0 10px}.auth-box input::placeholder{color:#95a6b2}.auth-tabs{grid-template-columns:1fr 1fr;gap:6px;display:grid}.auth-tabs button,.account-box button,.library-item button{color:#f7fbfc;background:#ffffff14;border:1px solid #ffffff29;border-radius:6px;min-height:38px}.auth-tabs button.active,.library-item.active .library-open{color:#162029;background:#d6b45a;border-color:#d6b45a}.account-box{background:#ffffff0f;border:1px solid #ffffff1f;border-radius:8px;padding:14px}.account-box span,.library-list small{color:#b9c6cf;font-size:.84rem}.library-list{max-height:260px;overflow:auto}.library-list>strong{color:#dce6eb;font-size:.86rem}.library-item{grid-template-columns:minmax(0,1fr) 38px;gap:4px;display:grid}.library-open{text-align:left;justify-items:start;gap:4px;padding:10px;display:grid}.library-delete{color:#f1b7b1;place-items:center;padding:0;display:grid}.library-delete:hover:not(:disabled){background:#b423182e;border-color:#b423189e}.library-delete:disabled{cursor:not-allowed;opacity:.55}.library-open span{text-overflow:ellipsis;white-space:nowrap;width:100%;overflow:hidden}.file-input{color:#dce6eb;width:100%}.file-input:disabled{cursor:wait;opacity:.62}.control-group{gap:10px;display:grid}.control-group label{color:#dce6eb;font-size:.86rem;font-weight:700}.control-group select,.control-group input[type=range]{width:100%}.control-group select{color:#f7fbfc;background:#26333d;border:1px solid #ffffff2e;border-radius:6px;min-height:40px;padding:0 10px}.status{color:#c8d5de;margin:0;font-size:.92rem;line-height:1.45}.main{grid-template-rows:auto minmax(0,1fr);gap:24px;min-width:0;height:100vh;min-height:0;padding:32px;display:grid;overflow:hidden}.toolbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;min-width:0;display:flex}.document-title{min-width:220px}.document-title h2{margin:0;font-size:clamp(1.25rem,2vw,2rem)}.document-title p{color:var(--muted);margin:4px 0 0}.progress-block{gap:6px;max-width:420px;margin-top:10px;display:grid}.progress-meta{color:var(--muted);flex-wrap:wrap;gap:10px;font-size:.84rem;font-weight:700;display:flex}.progress-block progress{background:var(--panel-soft);border:0;border-radius:999px;width:100%;height:8px;overflow:hidden}.progress-block progress::-webkit-progress-bar{background:var(--panel-soft)}.progress-block progress::-webkit-progress-value{background:var(--accent)}.progress-block progress::-moz-progress-bar{background:var(--accent)}.actions{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.icon-button,.primary-button{border:1px solid var(--line);background:var(--panel);min-height:42px;color:var(--foreground);border-radius:8px;justify-content:center;align-items:center;transition:background .15s,border-color .15s,transform .15s;display:inline-flex}.icon-button{width:42px}.primary-button{background:var(--accent);border-color:var(--accent);color:#fff;gap:8px;padding:0 16px;font-weight:800}.icon-button:hover,.primary-button:hover{transform:translateY(-1px)}.primary-button:hover{background:var(--accent-strong)}.icon-button:disabled,.primary-button:disabled{cursor:not-allowed;opacity:.45;transform:none}.reader{grid-template-columns:minmax(180px,240px) minmax(0,1fr);gap:18px;min-height:0;transition:grid-template-columns .18s;display:grid}.shell.pages-collapsed .reader{grid-template-columns:48px minmax(0,1fr)}.pages-panel{grid-template-rows:auto minmax(0,1fr);gap:10px;min-height:0;display:grid;overflow:hidden}.pages-toggle{border:1px solid var(--line);background:var(--panel);min-height:42px;color:var(--foreground);border-radius:8px;justify-content:center;align-items:center;gap:8px;font-weight:800;display:inline-flex}.shell.pages-collapsed .pages-toggle span,.shell.pages-collapsed .pages{display:none}.pages{align-content:start;gap:8px;min-height:0;display:grid;overflow:auto}.page-button{border:1px solid var(--line);background:var(--panel);text-align:left;color:var(--foreground);border-radius:8px;padding:12px}.page-button.active{border-color:var(--accent);background:var(--accent-soft)}.page-button strong{margin-bottom:4px;display:block}.page-button span{color:var(--muted);font-size:.84rem}.content{background:var(--panel);border:1px solid var(--line);min-width:0;height:100%;min-height:0;box-shadow:var(--shadow);border-radius:8px;padding:clamp(18px,3vw,42px);position:relative;overflow:auto}.upload-overlay{z-index:5;color:var(--foreground);text-align:center;background:#ffffffdb;align-content:center;place-items:center;gap:12px;padding:24px;display:grid;position:absolute;inset:0}.upload-overlay strong{font-size:1.05rem}.upload-overlay span{max-width:360px;color:var(--muted);line-height:1.45}.upload-spinner{border:4px solid var(--line);border-top-color:var(--accent);border-radius:999px;width:44px;height:44px;animation:.8s linear infinite spin}.viewer{grid-template-rows:auto minmax(0,1fr);gap:18px;height:100%;min-height:0;display:grid}.view-tabs{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.view-tabs button{border:1px solid var(--line);background:var(--panel-soft);min-height:38px;color:var(--foreground);border-radius:8px;padding:0 14px;font-weight:800}.view-tabs button.active{background:var(--accent);border-color:var(--accent);color:#fff}.zoom-control{color:var(--muted);align-items:center;gap:10px;margin-left:auto;font-size:.84rem;font-weight:800;display:inline-flex}.zoom-control input{width:130px}.empty{min-height:52vh;color:var(--muted);text-align:center;place-items:center;display:grid}.empty svg{color:var(--accent);margin-bottom:18px}.text-blocks{align-content:start;gap:14px;max-width:880px;min-height:0;display:grid;overflow:auto}.text-block{color:#26333d;border-left:4px solid #0000;border-radius:6px;margin:0;padding:12px 14px;line-height:1.65}.text-block.current{border-left-color:var(--accent);background:var(--accent-soft)}.pdf-scroll{align-content:start;justify-items:center;gap:22px;width:100%;height:100%;min-height:0;padding:8px 0 24px;display:grid;position:relative;overflow:auto}.pdf-page{background:#fff;position:relative;box-shadow:0 12px 32px #16202929}.pdf-page 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