:root{--bg:#eef1f5;--surface:#fff;--surface-soft:#f7f8fa;--border:#d9dee7;--text:#1f2937;--muted:#6b7280;--primary:#2563eb;--primary-hover:#1d4ed8;--active:#e8f0ff;--active-border:#8db2ff;--shadow:0 10px 30px #0f172a29}*{box-sizing:border-box}[hidden]{display:none!important}html,body{height:100%;color:var(--text);background:var(--bg);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;overflow:hidden}button,input{font:inherit}button{-webkit-user-select:none;user-select:none}body{grid-template-rows:56px 56px minmax(0,1fr) 28px;display:grid}.topbar,.toolstrip,.statusbar{background:var(--surface);border-color:var(--border)}.topbar{border-bottom:1px solid var(--border);z-index:20;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:18px;padding:0 14px;display:grid}.brand,.toolbar,.tool-group,.compact-control,.navigation,.page-control,.statusbar{align-items:center;display:flex}.brand{white-space:nowrap;gap:9px}.brand-mark{color:#fff;letter-spacing:.5px;background:#dc2626;border-radius:7px;place-items:center;width:36px;height:32px;font-size:11px;font-weight:800;display:grid}.brand-name{font-weight:700}.toolbar{gap:10px;min-width:0}.toolbar-file{overflow:hidden}.toolbar-actions{justify-content:flex-end}.file-name{text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:13px;overflow:hidden}.button,.icon-button,.tool-button{border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;border-radius:7px;transition:background .15s,border-color .15s,transform 50ms}.button:hover:not(:disabled),.icon-button:hover:not(:disabled),.tool-button:hover:not(:disabled){background:var(--surface-soft);border-color:#b9c1ce}.button:active:not(:disabled),.icon-button:active:not(:disabled),.tool-button:active:not(:disabled){transform:translateY(1px)}button:disabled{opacity:.45;cursor:not-allowed}.button{height:34px;padding:0 13px;font-size:13px;font-weight:600}.button-primary{background:var(--primary);border-color:var(--primary);color:#fff}.button-primary:hover:not(:disabled){background:var(--primary-hover);border-color:var(--primary-hover)}.button-small{height:30px;padding:0 10px}.button-large{height:42px;padding:0 22px;font-size:14px}.icon-button{place-items:center;width:32px;height:32px;padding:0;font-size:20px;display:grid}.toolstrip{border-bottom:1px solid var(--border);z-index:15;align-items:center;gap:12px;padding:7px 14px;display:flex;overflow:auto 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var(--border);background:var(--surface);cursor:pointer;border-radius:6px;width:32px;height:30px;padding:2px}.range-control input[type=range]{width:84px;accent-color:var(--primary)}.range-control output{min-width:29px;color:var(--text);font-variant-numeric:tabular-nums}.navigation{gap:6px;margin-left:auto}.page-control{color:var(--muted);gap:6px;font-size:12px}.page-control input{text-align:center;border:1px solid var(--border);background:var(--surface);width:54px;height:30px;color:var(--text);border-radius:6px;padding:0 5px}.zoom-label{text-align:center;font-variant-numeric:tabular-nums;width:48px;font-size:12px}.tool-menu{z-index:90;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fffffffa;border:1px solid #d7dce5;border-radius:11px;width:236px;padding:6px;position:fixed;box-shadow:0 14px 38px #0f172a38}.tool-menu-item{width:100%;min-height:48px;color:var(--text);text-align:left;cursor:pointer;background:0 0;border:0;border-radius:8px;grid-template-columns:30px minmax(0,1fr);align-items:center;gap:8px;padding:7px 9px;display:grid;position:relative}.tool-menu-item:hover{background:#f1f5f9}.tool-menu-item.selected{color:#174ea6;background:#eaf1ff}.tool-menu-item.selected:after{content:"✓";color:var(--primary);font-weight:800;position:absolute;right:14px}.tool-menu-item>span:last-child{gap:2px;padding-right:18px;display:grid}.tool-menu-item strong{font-size:12px;font-weight:650}.tool-menu-item small{color:#758195;font-size:10px}.menu-option-icon{color:#334155;background:#f5f7fa;border-radius:7px;place-items:center;width:28px;height:28px;font-size:18px;font-weight:700;display:grid}.tool-menu-item.selected .menu-option-icon{color:#174ea6;background:#dbe8ff}.tool-menu-separator{background:#e5e9f0;height:1px;margin:5px 4px}.menu-range-control{color:#475569;gap:8px;padding:7px 9px 9px;font-size:11px;display:grid}.menu-range-control>span{justify-content:space-between;align-items:center;display:flex}.menu-range-control output{color:#174ea6;font-variant-numeric:tabular-nums}.menu-range-control input{width:100%;accent-color:var(--primary)}.viewer-area{overscroll-behavior:contain;scroll-behavior:smooth;background:#dfe3e9;position:relative;overflow:auto}.welcome-panel{place-items:center;min-height:100%;padding:30px;display:grid}.welcome-card{text-align:center;background:var(--surface);border:1px solid var(--border);width:min(430px,92vw);box-shadow:var(--shadow);border-radius:14px;padding:38px}.welcome-icon{color:#fff;letter-spacing:1px;background:#dc2626;border-radius:14px;place-items:center;width:68px;height:68px;margin:0 auto 18px;font-weight:800;display:grid}.welcome-card h1{margin:0 0 10px;font-size:24px}.welcome-card p{color:var(--muted);margin:0 0 22px;line-height:1.55}.welcome-card .welcome-note{margin:16px 0 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0;line-height:1;overflow:hidden}.text-layer span,.text-layer br{color:#0000;white-space:pre;cursor:text;transform-origin:0 0;position:absolute}.text-layer ::selection{background:#2563eb47}.text-layer.highlight-mode ::selection{background:#ffd84d6b}.text-layer.disabled{pointer-events:none;-webkit-user-select:none;user-select:none}.annotation-canvas{z-index:3;touch-action:none}.annotation-canvas.pass-through{pointer-events:none}.annotation-canvas.eraser-mode{cursor:cell}.annotation-canvas.draw-mode{cursor:crosshair}.loading-overlay{z-index:50;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#eef1f5d1;flex-direction:column;justify-content:center;align-items:center;gap:13px;font-weight:600;display:flex;position:fixed;inset:112px 0 28px}.spinner{border:4px solid #cfd6e1;border-top-color:var(--primary);border-radius:50%;width:38px;height:38px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.statusbar{border-top:1px solid var(--border);color:var(--muted);z-index:20;justify-content:space-between;padding:0 12px;font-size:11px}.autosave-indicator{align-items:center;gap:6px;display:flex}.status-dot{background:#16a34a;border-radius:50%;width:7px;height:7px}.toast{z-index:100;color:#fff;max-width:min(520px,90vw);box-shadow:var(--shadow);opacity:0;pointer-events:none;background:#111827;border-radius:8px;padding:10px 15px;font-size:13px;transition:opacity .18s,transform .18s;position:fixed;bottom:45px;left:50%;transform:translate(-50%,8px)}.toast.show{opacity:1;transform:translate(-50%)}@media (max-width:980px){.brand-name,.tool-options{display:none}.document-stage{padding-inline:18px}}@media (max-width:720px){body{grid-template-rows:52px 56px minmax(0,1fr) 28px}.topbar{gap:8px;padding-inline:8px}.brand{display:none}.topbar{grid-template-columns:minmax(0,1fr) auto}.toolbar-actions .icon-button{display:none}.file-name{max-width:120px}.navigation{margin-left:0}.loading-overlay{top:108px}.document-stage{padding-inline:10px}.pages-container{gap:18px}.tool-menu{width:min(236px,100vw - 16px)}}