:root{--bg-primary: #0a0a0f;--bg-secondary: #12121a;--bg-tertiary: #1a1a25;--bg-elevated: rgba(30, 30, 45, .7);--bg-glass: rgba(255, 255, 255, .03);--bg-glass-strong: rgba(255, 255, 255, .08);--accent-primary: #6366F1;--accent-primary-rgb: 99, 102, 241;--accent-secondary: #8B5CF6;--accent-tertiary: #EC4899;--accent-success: #10B981;--accent-warning: #F59E0B;--accent-danger: #EF4444;--gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);--gradient-vibrant: linear-gradient(135deg, #6366F1 0%, #EC4899 100%);--gradient-subtle: linear-gradient(180deg, rgba(99, 102, 241, .15) 0%, transparent 100%);--text-primary: #FAFAFA;--text-secondary: rgba(250, 250, 250, .7);--text-tertiary: rgba(250, 250, 250, .5);--text-muted: rgba(250, 250, 250, .3);--border-subtle: rgba(255, 255, 255, .06);--border-medium: rgba(255, 255, 255, .1);--border-strong: rgba(255, 255, 255, .15);--border-accent: rgba(99, 102, 241, .5);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 20px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 40px rgba(0, 0, 0, .5);--shadow-glow: 0 0 40px rgba(99, 102, 241, .3);--shadow-glow-subtle: 0 0 20px rgba(99, 102, 241, .15);--font-main: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--spacing-3xl: 4rem;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .4s ease;--transition-spring: .4s cubic-bezier(.34, 1.56, .64, 1);--z-base: 0;--z-dropdown: 100;--z-sticky: 200;--z-modal: 1000;--z-toast: 2000}[data-theme=light]{--bg-primary: #F8FAFC;--bg-secondary: #FFFFFF;--bg-tertiary: #F1F5F9;--bg-elevated: rgba(255, 255, 255, .8);--bg-glass: rgba(255, 255, 255, .7);--bg-glass-strong: rgba(255, 255, 255, .9);--text-primary: #0F172A;--text-secondary: #475569;--text-tertiary: #94A3B8;--text-muted: #CBD5E1;--border-subtle: rgba(0, 0, 0, .06);--border-medium: rgba(0, 0, 0, .1);--border-strong: rgba(0, 0, 0, .15);--border-accent: rgba(99, 102, 241, .3);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-glow: 0 0 20px rgba(99, 102, 241, .15);--gradient-subtle: linear-gradient(180deg, rgba(99, 102, 241, .05) 0%, transparent 100%)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-main);background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;overflow-x:hidden;min-height:100vh}::selection{background:#6366f166;color:var(--text-primary)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:var(--radius-full);border:2px solid var(--bg-secondary)}::-webkit-scrollbar-thumb:hover{background:var(--accent-primary)}.bg-gradient{position:fixed;inset:0;background:radial-gradient(ellipse 80% 50% at 50% -20%,rgba(99,102,241,.15),transparent),radial-gradient(ellipse 60% 40% at 80% 100%,rgba(139,92,246,.1),transparent),radial-gradient(ellipse 50% 30% at 10% 80%,rgba(236,72,153,.08),transparent);pointer-events:none;z-index:-2}.bg-noise{position:fixed;inset:0;opacity:.03;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");pointer-events:none;z-index:-1}.floating-orbs{position:fixed;inset:0;pointer-events:none;z-index:-1;overflow:hidden}.orb{position:absolute;border-radius:50%;filter:blur(60px);opacity:.4;animation:float 20s infinite ease-in-out}.orb-1{width:400px;height:400px;background:var(--accent-primary);top:-10%;right:10%;animation-delay:0s}.orb-2{width:300px;height:300px;background:var(--accent-secondary);bottom:10%;left:-5%;animation-delay:-7s}.orb-3{width:350px;height:350px;background:var(--accent-tertiary);top:50%;right:-10%;animation-delay:-14s}@keyframes float{0%,to{transform:translate(0) scale(1)}25%{transform:translate(30px,-30px) scale(1.05)}50%{transform:translate(-20px,20px) scale(.95)}75%{transform:translate(20px,40px) scale(1.02)}}.app-container{display:flex;flex-direction:column;min-height:100vh}.app-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md) var(--spacing-xl);background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border-subtle);position:sticky;top:0;z-index:var(--z-sticky)}.logo{display:flex;align-items:center;gap:var(--spacing-md)}.logo-icon svg{width:40px;height:40px;filter:drop-shadow(0 4px 12px rgba(99,102,241,.4))}.logo-text{font-size:1.4rem;font-weight:700;letter-spacing:-.02em}.logo-text .accent{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-nav{display:flex;gap:var(--spacing-sm)}.nav-btn{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background:transparent;border:none;border-radius:var(--radius-md);color:var(--text-secondary);font-size:.9rem;font-weight:500;cursor:pointer;transition:all var(--transition-base)}.nav-btn:hover{background:var(--bg-glass-strong);color:var(--text-primary)}.nav-btn.active{background:var(--bg-glass-strong);color:var(--accent-primary)}.nav-btn svg{width:18px;height:18px}.header-actions{display:flex;align-items:center;gap:var(--spacing-md)}.icon-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:transparent;border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-base)}.icon-btn:hover{background:var(--bg-glass-strong);border-color:var(--border-medium);color:var(--text-primary)}.icon-btn svg{width:20px;height:20px}.user-avatar{position:relative;width:40px;height:40px;background:var(--gradient-primary);border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;font-weight:600;font-size:.9rem;color:#fff;cursor:pointer;transition:transform var(--transition-spring)}.user-avatar:hover{transform:scale(1.05)}.avatar-ring{position:absolute;inset:-3px;border:2px solid var(--accent-primary);border-radius:var(--radius-full);opacity:.5}.main-content{flex:1;display:flex;flex-direction:column}.welcome-section{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-2xl);gap:var(--spacing-3xl)}.welcome-content{text-align:center;max-width:600px}.welcome-icon{display:inline-flex;align-items:center;justify-content:center;width:80px;height:80px;background:var(--gradient-primary);border-radius:var(--radius-xl);margin-bottom:var(--spacing-lg);box-shadow:var(--shadow-glow);animation:pulse-glow 3s infinite}.welcome-icon svg{width:40px;height:40px;color:#fff}@keyframes pulse-glow{0%,to{box-shadow:0 0 30px #6366f166}50%{box-shadow:0 0 50px #6366f199}}.welcome-content h1{font-size:2.5rem;font-weight:700;margin-bottom:var(--spacing-md);background:linear-gradient(135deg,var(--text-primary) 0%,var(--text-secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.welcome-content>p{color:var(--text-secondary);font-size:1.1rem;margin-bottom:var(--spacing-xl)}.upload-zone{position:relative;padding:var(--spacing-3xl) var(--spacing-2xl);background:var(--bg-glass);border:2px dashed var(--border-medium);border-radius:var(--radius-xl);cursor:pointer;transition:all var(--transition-base)}.upload-zone:hover{background:var(--bg-glass-strong);border-color:var(--accent-primary);box-shadow:var(--shadow-glow-subtle)}.upload-zone.dragover{background:#6366f11a;border-color:var(--accent-primary);transform:scale(1.02)}.upload-icon{margin-bottom:var(--spacing-lg)}.upload-icon svg{width:60px;height:60px;color:var(--accent-primary);animation:bounce-subtle 2s infinite}@keyframes bounce-subtle{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.upload-text{display:flex;flex-direction:column;gap:var(--spacing-xs);margin-bottom:var(--spacing-lg)}.upload-text .primary{font-size:1.1rem;font-weight:600;color:var(--text-primary)}.upload-text .secondary{font-size:.9rem;color:var(--text-tertiary)}.demo-btn-wrapper{margin-top:var(--spacing-lg)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-md) var(--spacing-lg);font-family:inherit;font-size:.95rem;font-weight:600;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);text-decoration:none}.btn svg{width:18px;height:18px}.btn-primary{background:var(--gradient-primary);color:#fff;box-shadow:0 4px 15px #6366f166}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 25px #6366f180}.btn-primary:active{transform:translateY(0)}.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border-subtle)}.btn-ghost:hover{background:var(--bg-glass-strong);color:var(--text-primary);border-color:var(--border-medium)}.btn-danger{background:var(--accent-danger);color:#fff}.btn-danger:hover{background:#dc2626}.btn-sm{padding:var(--spacing-sm) var(--spacing-md);font-size:.85rem}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--spacing-lg);max-width:900px;width:100%}.feature-card{position:relative;padding:var(--spacing-xl);background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);text-align:center;transition:all var(--transition-base);overflow:hidden}.feature-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient-primary);opacity:0;transition:opacity var(--transition-base)}.feature-card:hover{transform:translateY(-5px);border-color:var(--border-medium);box-shadow:var(--shadow-md)}.feature-card:hover:before{opacity:1}.feature-icon{display:inline-flex;align-items:center;justify-content:center;width:50px;height:50px;border-radius:var(--radius-md);margin-bottom:var(--spacing-md)}.feature-icon svg{width:24px;height:24px;color:#fff}.feature-icon.gradient-1{background:linear-gradient(135deg,#6366f1,#818cf8)}.feature-icon.gradient-2{background:linear-gradient(135deg,#f59e0b,#fbbf24)}.feature-icon.gradient-3{background:linear-gradient(135deg,#10b981,#34d399)}.feature-card h3{font-size:1.1rem;font-weight:600;margin-bottom:var(--spacing-sm);color:var(--text-primary)}.feature-card p{font-size:.9rem;color:var(--text-tertiary);line-height:1.5}.editor-section{flex:1;display:flex;flex-direction:column;height:calc(100vh - 70px)}.editor-toolbar{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-sm) var(--spacing-lg);background:var(--bg-glass);border-bottom:1px solid var(--border-subtle)}.toolbar-left,.toolbar-center,.toolbar-right{display:flex;align-items:center;gap:var(--spacing-md)}.toolbar-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:transparent;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-base)}.toolbar-btn:hover{background:var(--bg-glass-strong);border-color:var(--border-medium);color:var(--text-primary)}.toolbar-btn svg{width:18px;height:18px}.file-info{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-glass-strong);border-radius:var(--radius-sm);font-size:.9rem;color:var(--text-secondary)}.file-info svg{width:16px;height:16px;color:var(--accent-primary)}.page-navigation{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-xs) var(--spacing-sm);background:var(--bg-glass-strong);border-radius:var(--radius-md)}.nav-page-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:transparent;border:none;border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-base)}.nav-page-btn:hover:not(:disabled){background:var(--bg-glass);color:var(--text-primary)}.nav-page-btn:disabled{opacity:.3;cursor:not-allowed}.nav-page-btn svg{width:18px;height:18px}.page-indicator{font-size:.9rem;color:var(--text-secondary);min-width:100px;text-align:center}.zoom-controls{display:flex;align-items:center;gap:var(--spacing-sm)}.zoom-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--bg-glass-strong);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-base)}.zoom-btn:hover{background:var(--bg-tertiary);color:var(--text-primary)}.zoom-btn svg{width:16px;height:16px}.zoom-value{font-size:.9rem;color:var(--text-secondary);min-width:50px;text-align:center;font-family:var(--font-mono)}.settings-dropdown{position:relative}.dropdown-menu{position:absolute;top:100%;right:0;margin-top:var(--spacing-sm);min-width:200px;background:var(--bg-elevated);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border-medium);border-radius:var(--radius-md);padding:var(--spacing-sm);opacity:0;visibility:hidden;transform:translateY(-10px);transition:all var(--transition-base);z-index:var(--z-dropdown)}.dropdown-menu.active{opacity:1;visibility:visible;transform:translateY(0)}.dropdown-item{display:flex;align-items:center;gap:var(--spacing-sm);width:100%;padding:var(--spacing-sm) var(--spacing-md);background:transparent;border:none;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:.9rem;cursor:pointer;transition:all var(--transition-base)}.dropdown-item:hover{background:var(--bg-glass-strong);color:var(--text-primary)}.dropdown-item.danger{color:var(--accent-danger)}.dropdown-item.danger:hover{background:#ef44441a}.dropdown-item svg{width:16px;height:16px}.editor-main{flex:1;display:flex;overflow:hidden}.editor-sidebar{width:280px;background:var(--bg-glass);border-right:1px solid var(--border-subtle);padding:var(--spacing-lg);display:flex;flex-direction:column;gap:var(--spacing-lg);overflow-y:auto}.sidebar-section h3{font-size:.85rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-tertiary);margin-bottom:var(--spacing-md)}.signature-preview-box{background:var(--bg-glass-strong);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:var(--spacing-md);min-height:100px;display:flex;align-items:center;justify-content:center}.no-signature{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-sm);text-align:center}.no-signature svg{width:32px;height:32px;color:var(--text-muted)}.no-signature span{font-size:.85rem;color:var(--text-tertiary)}.signature-preview{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-sm);width:100%}.signature-preview img{max-width:100%;max-height:80px;object-fit:contain}.mode-toggle-btn{position:relative;display:flex;align-items:center;gap:var(--spacing-sm);width:100%;padding:var(--spacing-md);background:var(--bg-glass-strong);border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-secondary);font-size:.9rem;cursor:pointer;transition:all var(--transition-base)}.mode-toggle-btn:hover{border-color:var(--border-medium)}.mode-toggle-btn.active{background:#6366f11a;border-color:var(--accent-primary);color:var(--accent-primary)}.mode-toggle-btn svg{width:18px;height:18px}.mode-indicator{position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent-primary);border-radius:var(--radius-sm) 0 0 var(--radius-sm);opacity:0;transition:opacity var(--transition-base)}.mode-toggle-btn.active .mode-indicator{opacity:1}.mode-status{margin-left:auto;font-size:.75rem;text-transform:uppercase;letter-spacing:.05em}.placed-signatures{min-height:80px;display:flex;flex-direction:column;gap:var(--spacing-sm)}.no-placed-signatures{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-md);text-align:center}.no-placed-signatures svg{width:24px;height:24px;color:var(--text-muted)}.no-placed-signatures span{font-size:.85rem;color:var(--text-tertiary)}.signature-item{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-glass-strong);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);font-size:.85rem;color:var(--text-secondary)}.signature-remove{display:flex;align-items:center;justify-content:center;width:24px;height:24px;background:transparent;border:none;border-radius:var(--radius-sm);color:var(--text-tertiary);cursor:pointer;transition:all var(--transition-base)}.signature-remove:hover{background:#ef44441a;color:var(--accent-danger)}.signature-count{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm);margin-top:var(--spacing-sm);background:#10b9811a;border-radius:var(--radius-sm);font-size:.85rem;color:var(--accent-success)}.signature-count svg{width:16px;height:16px}.canvas-container{flex:1;position:relative;overflow:auto;display:flex;align-items:flex-start;justify-content:center;padding:var(--spacing-xl);background:var(--bg-primary)}.canvas-wrapper{position:relative;box-shadow:var(--shadow-lg);border-radius:var(--radius-sm);overflow:hidden}.canvas-wrapper.signature-mode{cursor:crosshair}.canvas-wrapper canvas{display:block;background:#fff}.signature-cursor{position:fixed;pointer-events:none;transform:translate(-50%,-50%);opacity:.8;z-index:100;border:2px dashed var(--accent-primary);border-radius:var(--radius-sm);background:#6366f11a;padding:5px}.signature-cursor img{width:200px;height:60px;object-fit:contain}.signature-cursor.hidden{display:none}.canvas-loading,.canvas-error{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-md);background:var(--bg-primary)}.loading-spinner{position:relative;width:50px;height:50px}.spinner-ring{width:100%;height:100%;border:3px solid var(--border-subtle);border-top-color:var(--accent-primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.canvas-loading span{color:var(--text-secondary);font-size:.9rem}.error-icon{width:60px;height:60px;display:flex;align-items:center;justify-content:center;background:#ef44441a;border-radius:var(--radius-full)}.error-icon svg{width:30px;height:30px;color:var(--accent-danger)}.canvas-error h3{color:var(--text-primary);font-size:1.2rem}.canvas-error p{color:var(--text-tertiary);font-size:.9rem;text-align:center;max-width:300px}.editor-actions{display:flex;align-items:center;justify-content:flex-end;gap:var(--spacing-md);padding:var(--spacing-md) var(--spacing-lg);background:var(--bg-glass);border-top:1px solid var(--border-subtle)}.btn-confirm{min-width:200px}.modal-overlay{position:fixed;inset:0;background:#000000b3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:var(--z-modal);padding:var(--spacing-xl)}.modal-overlay.hidden{display:none}.modal{background:var(--bg-secondary);border:1px solid var(--border-medium);border-radius:var(--radius-xl);max-width:600px;width:100%;max-height:90vh;overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow-lg)}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-lg) var(--spacing-xl);border-bottom:1px solid var(--border-subtle)}.modal-header h2{display:flex;align-items:center;gap:var(--spacing-sm);font-size:1.2rem;font-weight:600}.modal-header h2 svg{width:24px;height:24px;color:var(--accent-primary)}.modal-close{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:transparent;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-base)}.modal-close:hover{background:var(--bg-glass-strong);color:var(--text-primary)}.modal-close svg{width:18px;height:18px}.modal-body{padding:var(--spacing-xl);overflow-y:auto;flex:1}.modal-footer{display:flex;align-items:center;justify-content:flex-end;gap:var(--spacing-md);padding:var(--spacing-lg) var(--spacing-xl);border-top:1px solid var(--border-subtle)}.signature-modal{max-width:700px}.existing-signature{display:flex;flex-direction:column;gap:var(--spacing-lg)}.existing-signature.hidden{display:none}.current-signature label{display:block;font-size:.85rem;color:var(--text-tertiary);margin-bottom:var(--spacing-sm)}.signature-display{display:flex;align-items:center;justify-content:center;padding:var(--spacing-xl);background:#fff;border:1px solid var(--border-medium);border-radius:var(--radius-md);min-height:120px}.signature-display img{max-width:100%;max-height:100px;object-fit:contain}.signature-actions-row{display:flex;gap:var(--spacing-md);flex-wrap:wrap}.create-signature.hidden{display:none}.creation-tabs{display:flex;gap:var(--spacing-sm);margin-bottom:var(--spacing-lg)}.tab-btn{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background:transparent;border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-secondary);font-size:.9rem;cursor:pointer;transition:all var(--transition-base)}.tab-btn:hover{background:var(--bg-glass-strong)}.tab-btn.active{background:var(--gradient-primary);border-color:transparent;color:#fff}.tab-btn svg{width:16px;height:16px}.tab-content{display:none}.tab-content.active{display:block}.signature-canvas-container{position:relative;background:#fff;border:1px solid var(--border-medium);border-radius:var(--radius-md);overflow:hidden}.signature-canvas-container canvas{display:block;width:100%;height:200px;cursor:crosshair}.canvas-placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-sm);pointer-events:none;color:var(--text-muted)}.canvas-placeholder.hidden{display:none}.canvas-placeholder svg{width:32px;height:32px;opacity:.3}.canvas-placeholder span{font-size:.9rem;opacity:.5}.canvas-actions{display:flex;justify-content:flex-end;margin-top:var(--spacing-md)}.import-zone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-md);padding:var(--spacing-3xl);background:var(--bg-glass);border:2px dashed var(--border-medium);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-base)}.import-zone:hover{background:var(--bg-glass-strong);border-color:var(--accent-primary)}.import-icon svg{width:48px;height:48px;color:var(--accent-primary)}.import-zone span{color:var(--text-secondary);font-size:.9rem}.imported-preview{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-md)}.imported-preview.hidden{display:none}.imported-preview img{max-width:100%;max-height:150px;background:#fff;padding:var(--spacing-md);border-radius:var(--radius-md)}.confirm-modal{max-width:400px;text-align:center;padding:var(--spacing-xl)}.confirm-icon{width:60px;height:60px;margin:0 auto var(--spacing-lg);display:flex;align-items:center;justify-content:center;background:#ef44441a;border-radius:var(--radius-full)}.confirm-icon svg{width:30px;height:30px;color:var(--accent-danger)}.confirm-modal h3{font-size:1.2rem;margin-bottom:var(--spacing-sm)}.confirm-modal p{color:var(--text-secondary);margin-bottom:var(--spacing-xl)}.modal-actions{display:flex;gap:var(--spacing-md);justify-content:center}.toast-container{position:fixed;bottom:var(--spacing-xl);left:var(--spacing-xl);display:flex;flex-direction:column;gap:var(--spacing-sm);z-index:var(--z-toast)}.toast{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md) var(--spacing-lg);background:var(--bg-elevated);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border-medium);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translate(-100px)}to{opacity:1;transform:translate(0)}}.toast.fade-out{animation:slideOut .3s ease forwards}@keyframes slideOut{to{opacity:0;transform:translate(-100px)}}.toast-icon{width:24px;height:24px;display:flex;align-items:center;justify-content:center}.toast-icon svg{width:20px;height:20px}.toast.success .toast-icon svg{color:var(--accent-success)}.toast.error .toast-icon svg{color:var(--accent-danger)}.toast.warning .toast-icon svg{color:var(--accent-warning)}.toast.info .toast-icon svg{color:var(--accent-primary)}.toast-message{flex:1;font-size:.9rem;color:var(--text-primary)}.toast-close{display:flex;align-items:center;justify-content:center;width:24px;height:24px;background:transparent;border:none;border-radius:var(--radius-sm);color:var(--text-tertiary);cursor:pointer;transition:all var(--transition-base)}.toast-close:hover{background:var(--bg-glass-strong);color:var(--text-primary)}.toast-close svg{width:16px;height:16px}.hidden{display:none!important}.history-section{flex:1;display:flex;flex-direction:column;padding:var(--spacing-xl);max-width:1200px;margin:0 auto;width:100%}.history-container{display:flex;flex-direction:column;gap:var(--spacing-xl)}.history-header{text-align:center;margin-bottom:var(--spacing-md)}.history-title h1{font-size:2rem;font-weight:700;margin-bottom:var(--spacing-sm);background:linear-gradient(135deg,var(--text-primary) 0%,var(--text-secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.history-title p{color:var(--text-secondary);font-size:1rem}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--spacing-md)}.stats-card{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-lg);background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);transition:all var(--transition-base)}.stats-card:hover{transform:translateY(-2px);border-color:var(--border-medium);box-shadow:var(--shadow-md)}.stats-icon{display:flex;align-items:center;justify-content:center;width:50px;height:50px;border-radius:var(--radius-md)}.stats-icon svg{width:24px;height:24px;color:#fff}.stats-primary .stats-icon{background:var(--gradient-primary)}.stats-success .stats-icon{background:linear-gradient(135deg,#10b981,#34d399)}.stats-info .stats-icon{background:linear-gradient(135deg,#3b82f6,#60a5fa)}.stats-warning .stats-icon{background:linear-gradient(135deg,#f59e0b,#fbbf24)}.stats-content{display:flex;flex-direction:column}.stats-value{font-size:1.5rem;font-weight:700;color:var(--text-primary)}.stats-label{font-size:.85rem;color:var(--text-tertiary)}.history-filters{display:flex;align-items:center;gap:var(--spacing-md);flex-wrap:wrap}.search-box{flex:1;min-width:250px;display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-glass-strong);border:1px solid var(--border-subtle);border-radius:var(--radius-md);transition:all var(--transition-base)}.search-box:focus-within{border-color:var(--accent-primary);box-shadow:var(--shadow-glow-subtle)}.search-box svg{width:18px;height:18px;color:var(--text-tertiary)}.search-box input{flex:1;background:transparent;border:none;outline:none;color:var(--text-primary);font-size:.9rem}.search-box input::placeholder{color:var(--text-muted)}.clear-search{display:flex;align-items:center;justify-content:center;width:20px;height:20px;background:transparent;border:none;border-radius:var(--radius-full);color:var(--text-tertiary);cursor:pointer;transition:all var(--transition-base)}.clear-search:hover{background:var(--bg-glass-strong);color:var(--text-primary)}.clear-search svg{width:14px;height:14px}.filter-group{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-glass-strong);border:1px solid var(--border-subtle);border-radius:var(--radius-md)}.filter-group svg{width:18px;height:18px;color:var(--text-tertiary)}.filter-group select{background:transparent;border:none;outline:none;color:var(--text-secondary);font-size:.9rem;cursor:pointer}.filter-group select option{background:var(--bg-secondary);color:var(--text-primary)}.clear-all-btn{margin-left:auto}.history-list{display:flex;flex-direction:column;gap:var(--spacing-lg)}.history-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-3xl);text-align:center}.empty-icon{width:80px;height:80px;display:flex;align-items:center;justify-content:center;background:var(--bg-glass-strong);border-radius:var(--radius-xl);margin-bottom:var(--spacing-lg)}.empty-icon svg{width:40px;height:40px;color:var(--text-muted)}.history-empty h3{font-size:1.2rem;color:var(--text-primary);margin-bottom:var(--spacing-sm)}.history-empty p{color:var(--text-tertiary);font-size:.9rem}.history-group{display:flex;flex-direction:column;gap:var(--spacing-md)}.history-group-header{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) 0;border-bottom:1px solid var(--border-subtle);font-size:.85rem;color:var(--text-secondary)}.history-group-header svg{width:16px;height:16px;color:var(--accent-primary)}.group-count{margin-left:auto;font-size:.75rem;color:var(--text-muted)}.history-group-items{display:flex;flex-direction:column;gap:var(--spacing-sm)}.history-item{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md) var(--spacing-lg);background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:var(--radius-md);transition:all var(--transition-base)}.history-item:hover{background:var(--bg-glass-strong);border-color:var(--border-medium);transform:translate(4px)}.history-item-icon{display:flex;align-items:center;justify-content:center;width:44px;height:44px;background:var(--gradient-primary);border-radius:var(--radius-md);flex-shrink:0}.history-item-icon svg{width:22px;height:22px;color:#fff}.history-item-content{flex:1;min-width:0}.history-item-header{display:flex;align-items:center;gap:var(--spacing-md);margin-bottom:var(--spacing-xs)}.history-item-title{font-size:1rem;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.history-item-status{display:inline-flex;align-items:center;gap:var(--spacing-xs);padding:2px var(--spacing-sm);border-radius:var(--radius-full);font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;flex-shrink:0}.history-item-status svg{width:12px;height:12px}.status-success{background:#10b98126;color:var(--accent-success)}.status-info{background:#3b82f626;color:#3b82f6}.status-warning{background:#f59e0b26;color:var(--accent-warning)}.history-item-meta{display:flex;flex-wrap:wrap;gap:var(--spacing-md)}.meta-item{display:flex;align-items:center;gap:var(--spacing-xs);font-size:.8rem;color:var(--text-tertiary)}.meta-item svg{width:14px;height:14px}.history-item-time{font-size:.75rem;color:var(--text-muted);margin-top:var(--spacing-xs)}.history-item-actions{display:flex;align-items:center;gap:var(--spacing-sm)}.history-action-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:transparent;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-tertiary);cursor:pointer;transition:all var(--transition-base)}.history-action-btn:hover{background:var(--bg-glass-strong);color:var(--text-primary);border-color:var(--border-medium)}.history-action-btn.delete:hover{background:#ef44441a;color:var(--accent-danger);border-color:var(--accent-danger)}.history-action-btn svg{width:18px;height:18px}@media(max-width:1024px){.features-grid{grid-template-columns:repeat(2,1fr)}.editor-sidebar{width:240px}.stats-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:768px){.app-header{padding:var(--spacing-sm) var(--spacing-md)}.header-nav,.nav-btn span{display:none}.features-grid{grid-template-columns:1fr}.editor-main{flex-direction:column}.editor-sidebar{width:100%;max-height:200px;border-right:none;border-bottom:1px solid var(--border-subtle)}.welcome-content h1{font-size:1.8rem}.modal{margin:var(--spacing-md);max-height:calc(100vh - 2rem)}.stats-grid{grid-template-columns:1fr}.history-filters{flex-direction:column;align-items:stretch}.search-box{min-width:100%}.clear-all-btn{margin-left:0}.history-item{flex-direction:column;align-items:flex-start;gap:var(--spacing-sm)}.history-item-actions{align-self:flex-end}}