@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap";
:root{--bg-primary:#08080e;--bg-secondary:#0e0e18;--bg-tertiary:#141422;--bg-elevated:#1a1a2e;--bg-hover:#20203a;--bg-active:#282848;--bg-glass:#14142a99;--bg-glass-hover:#1e1e3cb3;--border-subtle:#ffffff0f;--border-default:#ffffff1a;--border-accent:#8b5cf666;--border-accent-glow:#8b5cf699;--text-primary:#f0f0f8;--text-secondary:#9898b8;--text-tertiary:#6868a0;--text-muted:#484878;--accent:#8b5cf6;--accent-hover:#a78bfa;--accent-light:#8b5cf626;--accent-glow:#8b5cf64d;--gradient-accent:linear-gradient(135deg,#8b5cf6,#06b6d4);--gradient-accent-hover:linear-gradient(135deg,#a78bfa,#22d3ee);--gradient-bg:linear-gradient(180deg,#08080e 0%,#0e0e18 100%);--success:#10b981;--warning:#f59e0b;--error:#ef4444;--info:#06b6d4;--shadow-sm:0 1px 3px #0006;--shadow-md:0 4px 12px #00000080;--shadow-lg:0 10px 30px #0009;--shadow-glow:0 0 20px #8b5cf633;--shadow-glow-lg:0 0 40px #8b5cf64d;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;--font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--transition-fast:.15s cubic-bezier(.4,0,.2,1);--transition-normal:.25s cubic-bezier(.4,0,.2,1);--transition-slow:.4s cubic-bezier(.4,0,.2,1)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px}body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.6;overflow-x:hidden}::selection{background:var(--accent);color:#fff}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--text-muted);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInScale{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}@keyframes slideInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes borderGlow{0%,to{border-color:var(--border-accent);box-shadow:var(--shadow-glow)}50%{border-color:var(--border-accent-glow);box-shadow:var(--shadow-glow-lg)}}@keyframes dropzonePulse{0%,to{border-color:var(--accent);box-shadow:0 0 30px #8b5cf626}50%{border-color:var(--accent-hover);box-shadow:0 0 50px #8b5cf640}}.animate-in{animation:.4s ease-out fadeIn}.app-container{background:var(--gradient-bg);flex-direction:column;height:100vh;display:flex}.app-header{background:var(--bg-glass);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border-subtle);z-index:100;flex-shrink:0;justify-content:space-between;align-items:center;height:56px;padding:0 20px;display:flex}.app-logo{background:var(--gradient-accent);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;align-items:center;gap:10px;font-size:18px;font-weight:700;display:flex}.app-logo svg{color:var(--accent)}.tab-nav{background:var(--bg-secondary);border-radius:var(--radius-md);border:1px solid var(--border-subtle);gap:2px;padding:3px;display:flex}.tab-btn{color:var(--text-secondary);font-family:var(--font-sans);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;background:0 0;border:none;border-radius:7px;align-items:center;gap:6px;padding:7px 16px;font-size:13px;font-weight:500;display:flex}.tab-btn:hover{color:var(--text-primary);background:var(--bg-hover)}.tab-btn.active{color:#fff;background:var(--accent);box-shadow:0 2px 8px #8b5cf64d}.tab-btn svg{width:15px;height:15px}.header-actions{align-items:center;gap:8px;display:flex}.btn{border:1px solid var(--border-default);background:var(--bg-elevated);color:var(--text-primary);font-family:var(--font-sans);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;-webkit-user-select:none;user-select:none;justify-content:center;align-items:center;gap:8px;padding:8px 18px;font-size:13px;font-weight:500;display:inline-flex}.btn:hover{background:var(--bg-hover);border-color:var(--border-accent);box-shadow:var(--shadow-glow)}.btn:active{transform:scale(.97)}.btn svg{width:16px;height:16px}.btn-primary{background:var(--gradient-accent);color:#fff;border:none;font-weight:600}.btn-primary:hover{background:var(--gradient-accent-hover);box-shadow:var(--shadow-glow-lg);border-color:#0000}.btn-ghost{color:var(--text-secondary);background:0 0;border-color:#0000}.btn-ghost:hover{background:var(--bg-hover);color:var(--text-primary);border-color:#0000}.btn-icon{min-width:36px;min-height:36px;padding:8px}.btn-sm{padding:5px 12px;font-size:12px}.btn-sm svg{width:14px;height:14px}.btn-danger{color:var(--error);border-color:#ef44444d}.btn-danger:hover{background:#ef44441a;border-color:#ef444480;box-shadow:0 0 20px #ef444426}.main-content{flex:1;display:flex;position:relative;overflow:hidden}.welcome-screen{flex:1;justify-content:center;align-items:center;padding:40px;animation:.6s ease-out fadeIn;display:flex}.dropzone{border:2px dashed var(--border-default);border-radius:var(--radius-xl);background:var(--bg-glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);cursor:pointer;width:100%;max-width:560px;transition:all var(--transition-normal);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:20px;padding:60px 40px;display:flex}.dropzone:hover{border-color:var(--accent);background:var(--bg-glass-hover);box-shadow:var(--shadow-glow)}.dropzone.dragging{border-color:var(--accent);background:var(--accent-light);animation:1.5s ease-in-out infinite dropzonePulse}.dropzone-icon{border-radius:var(--radius-lg);background:var(--accent-light);width:72px;height:72px;color:var(--accent);transition:all var(--transition-normal);justify-content:center;align-items:center;display:flex}.dropzone:hover .dropzone-icon{box-shadow:var(--shadow-glow);transform:scale(1.05)}.dropzone-icon svg{width:32px;height:32px}.dropzone h2{background:var(--gradient-accent);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:22px;font-weight:700}.dropzone p{color:var(--text-secondary);max-width:340px;font-size:14px}.dropzone-formats{gap:8px;margin-top:4px;display:flex}.format-badge{border-radius:var(--radius-full);background:var(--bg-elevated);border:1px solid var(--border-subtle);color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.5px;padding:4px 12px;font-size:11px;font-weight:600}.editor-layout{flex:1;display:flex;overflow:hidden}.sidebar{background:var(--bg-secondary);border-right:1px solid var(--border-subtle);flex-direction:column;flex-shrink:0;width:220px;animation:.4s ease-out slideInLeft;display:flex}.sidebar-header{border-bottom:1px solid var(--border-subtle);justify-content:space-between;align-items:center;padding:12px 14px;display:flex}.sidebar-header h3{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.8px;font-size:12px;font-weight:600}.sidebar-pages{flex-direction:column;flex:1;gap:10px;padding:10px;display:flex;overflow-y:auto}.page-thumb{border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-fast);background:var(--bg-tertiary);border:2px solid #0000;flex-shrink:0;position:relative;overflow:hidden}.page-thumb:hover{border-color:var(--border-default)}.page-thumb.active{border-color:var(--accent);box-shadow:var(--shadow-glow)}.page-thumb canvas{border-radius:4px;width:100%;display:block}.page-thumb-label{color:var(--text-secondary);border-radius:var(--radius-sm);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#000000b3;padding:2px 6px;font-size:10px;font-weight:600;position:absolute;bottom:4px;right:4px}.toolbar{background:var(--bg-glass);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border-subtle);flex-wrap:wrap;flex-shrink:0;align-items:center;gap:6px;padding:6px 12px;display:flex}.toolbar-group{align-items:center;gap:2px;display:flex}.toolbar-separator{background:var(--border-subtle);width:1px;height:28px;margin:0 8px}.tool-btn{width:34px;height:34px;color:var(--text-secondary);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-fast);background:0 0;border:1px solid #0000;justify-content:center;align-items:center;display:flex;position:relative}.tool-btn:hover{color:var(--text-primary);background:var(--bg-hover)}.tool-btn.active{color:var(--accent);background:var(--accent-light);border-color:var(--border-accent)}.tool-btn svg{width:18px;height:18px}.tool-btn .tooltip{background:var(--bg-elevated);color:var(--text-primary);border-radius:var(--radius-sm);white-space:nowrap;opacity:0;pointer-events:none;z-index:200;border:1px solid var(--border-subtle);padding:3px 7px;font-size:11px;transition:opacity .1s;position:absolute;bottom:-28px;left:50%;transform:translate(-50%)}.tool-btn:hover .tooltip{opacity:1;transition-delay:.55s}.color-picker-wrapper{align-items:center;gap:6px;margin-left:4px;display:flex}.color-btn{border-radius:var(--radius-full);border:2px solid var(--border-default);cursor:pointer;width:24px;height:24px;transition:all var(--transition-fast);overflow:hidden}.color-btn:hover{transform:scale(1.15)}.color-btn.active{border-color:#fff;box-shadow:0 0 8px #ffffff4d}.stroke-width-selector{align-items:center;gap:6px;margin-left:4px;display:flex}.stroke-width-selector label{color:var(--text-tertiary);font-size:11px;font-weight:500}.stroke-width-selector input[type=range]{width:60px;accent-color:var(--accent);height:4px}.pdf-viewer-area{flex-direction:column;flex:1;display:flex;overflow:hidden}.pdf-viewport{background:var(--bg-primary);flex:1;padding:24px;position:relative;overflow:auto}.pdf-page-container{box-shadow:var(--shadow-lg);border-radius:4px;margin:0 auto;animation:.3s ease-out fadeInScale;position:relative;overflow:hidden}.pdf-page-container canvas{display:block}.annotation-layer{z-index:10;width:100%;height:100%;position:absolute;top:0;left:0}.annotation-layer canvas{position:absolute;top:0;left:0}.status-bar{background:var(--bg-secondary);border-top:1px solid var(--border-subtle);color:var(--text-tertiary);flex-shrink:0;justify-content:space-between;align-items:center;padding:6px 16px;font-size:12px;display:flex}.zoom-controls{align-items:center;gap:8px;display:flex}.zoom-controls span{text-align:center;min-width:44px;color:var(--text-secondary);font-weight:600}.panel-container{flex:1;justify-content:center;align-items:center;padding:40px;animation:.4s ease-out fadeIn;display:flex}.panel{background:var(--bg-glass);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);width:100%;max-width:700px;box-shadow:var(--shadow-lg);padding:36px}.panel h2{background:var(--gradient-accent);-webkit-text-fill-color:transparent;text-align:center;-webkit-background-clip:text;background-clip:text;margin-bottom:8px;font-size:22px;font-weight:700}.panel .panel-description{color:var(--text-secondary);text-align:center;margin-bottom:24px;font-size:14px}.file-list{flex-direction:column;gap:8px;min-height:60px;margin-bottom:24px;display:flex}.file-item{background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:var(--radius-md);transition:all var(--transition-fast);align-items:center;gap:12px;padding:12px 16px;animation:.3s ease-out slideInUp;display:flex}.file-item:hover{border-color:var(--border-default)}.file-item-icon{color:var(--accent);flex-shrink:0}.file-item-info{text-align:center;flex:1;min-width:0}.file-item-name{white-space:nowrap;text-overflow:ellipsis;font-size:13px;font-weight:500;overflow:hidden}.file-item-size{color:var(--text-tertiary);font-size:11px}.file-item-actions{flex-shrink:0;gap:4px;display:flex}.panel-actions{justify-content:center;gap:10px;display:flex}.panel-dropzone{border:2px dashed var(--border-default);border-radius:var(--radius-lg);text-align:center;cursor:pointer;transition:all var(--transition-normal);margin-bottom:24px;padding:32px}.panel-dropzone:hover{border-color:var(--accent);background:var(--accent-light)}.panel-dropzone svg{color:var(--text-tertiary);margin-bottom:8px}.panel-dropzone p{color:var(--text-secondary);font-size:14px}.split-controls{flex-direction:column;gap:12px;margin-bottom:24px;display:flex}.range-input-group{align-items:center;gap:10px;display:flex}.range-input-group label{color:var(--text-secondary);min-width:40px;font-size:13px}.range-input{background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-primary);font-family:var(--font-sans);transition:all var(--transition-fast);flex:1;padding:8px 14px;font-size:13px}.range-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light);outline:none}.range-chips{flex-wrap:wrap;gap:8px;margin-bottom:16px;display:flex}.range-chip{background:var(--accent-light);border:1px solid var(--border-accent);border-radius:var(--radius-full);color:var(--accent-hover);align-items:center;gap:6px;padding:6px 14px;font-size:12px;font-weight:500;animation:.2s ease-out fadeInScale;display:flex}.range-chip button{color:var(--accent);cursor:pointer;background:0 0;border:none;padding:0;line-height:1;display:flex}.range-chip button:hover{color:var(--error)}.toast-container{z-index:9999;flex-direction:column;gap:8px;display:flex;position:fixed;bottom:20px;right:20px}.toast{background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);align-items:center;gap:10px;min-width:250px;padding:12px 20px;font-size:13px;animation:.3s ease-out slideInRight;display:flex}.toast.success{border-left:3px solid var(--success)}.toast.error{border-left:3px solid var(--error)}.toast.info{border-left:3px solid var(--info)}.spinner{border:2px solid var(--border-subtle);border-top-color:var(--accent);border-radius:50%;width:20px;height:20px;animation:.6s linear infinite spin}.loading-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:50;background:#08080eb3;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.empty-state{color:var(--text-tertiary);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:8px;padding:40px;display:flex}.empty-state svg{opacity:.5;width:40px;height:40px;margin-bottom:8px}.remove-pages-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;max-height:500px;padding:4px;display:grid;overflow-y:auto}.remove-page-card{cursor:pointer;border-radius:var(--radius-md);background:var(--bg-elevated);border:2px solid var(--border-subtle);transition:all var(--transition-fast);text-align:center;overflow:hidden}.remove-page-card:hover{border-color:var(--border-default);box-shadow:var(--shadow-md);transform:translateY(-2px)}.remove-page-card.marked{border-color:var(--error);opacity:.7}.remove-page-card.marked:hover{opacity:.85}.remove-page-thumb{background:#fff;padding:6px;position:relative}.remove-page-thumb img{border-radius:3px;width:100%;display:block}.remove-page-overlay{color:var(--error);background:#ef444426;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.remove-page-label{color:var(--text-secondary);padding:8px 0;font-size:13px;font-weight:500;display:block}.remove-page-card.marked .remove-page-label{color:var(--error);text-decoration:line-through}.sidebar-toggle-btn{background:var(--bg-surface);border:none;border-right:1px solid var(--border-subtle);width:16px;color:var(--text-tertiary);cursor:pointer;transition:background var(--transition-fast),color var(--transition-fast);flex-shrink:0;justify-content:center;align-items:center;padding:0;display:flex}.sidebar-toggle-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.textLayer{-webkit-user-select:none;user-select:none;pointer-events:none}.textLayer span,.textLayer br{color:#0000;white-space:pre;cursor:text;transform-origin:0 0;position:absolute}.text-select-mode .textLayer{pointer-events:auto;-webkit-user-select:text;user-select:text;z-index:20;cursor:text}.text-select-mode .textLayer span{-webkit-user-select:text;user-select:text}.text-select-mode .textLayer span::selection{color:#0000;background:#3b82f659}@media (max-width:768px){.sidebar{z-index:200;position:fixed;top:56px;bottom:0;left:0;box-shadow:4px 0 24px #00000080}.sidebar-toggle-btn{z-index:201;border-right:1px solid var(--border-subtle);border-top:1px solid var(--border-subtle);border-bottom:1px solid var(--border-subtle);border-radius:0 6px 6px 0;width:24px;height:44px;position:fixed;bottom:72px;left:0}.toolbar{scrollbar-width:none;flex-wrap:nowrap;gap:2px;padding:4px 6px;overflow:auto visible}.toolbar::-webkit-scrollbar{display:none}.tool-btn{flex-shrink:0;width:32px;height:32px}.toolbar-separator,.stroke-width-selector,.color-picker-wrapper{flex-shrink:0}.app-header{padding:0 12px}.panel{padding:24px 20px}.tab-btn span{display:none}}