.feature-card,.preview-card,.signature-card{background:var(--glass-bg);backdrop-filter:blur(10px);box-shadow:var(--glass-shadow)}:root{--primary-color:#4361ee;--primary-dark:#3a0ca3;--primary-light:#4895ef;--secondary-color:#f72585;--success-color:#4cc9f0;--warning-color:#f8961e;--danger-color:#ef233c;--light-color:#f8f9fa;--dark-color:#212529;--gray-color:#6c757d;--light-gray:#e9ecef;--glass-bg:rgba(255, 255, 255, 0.15);--glass-border:rgba(255, 255, 255, 0.2);--glass-shadow:0 8px 32px 0 rgba(31, 38, 135, 0.2);--border-radius:12px;--box-shadow:0 10px 20px rgba(0, 0, 0, 0.1);--transition:all 0.3s ease}.feature-card,.pen-size-btn{transition:var(--transition)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Poppins,Montserrat,sans-serif;background:linear-gradient(135deg,#667eea 0,#764ba2 100%);color:var(--light-color);min-height:100vh;line-height:1.6}.app-container{width:100%;max-width:1200px;margin:0 auto;padding:20px}.app-header{text-align:center;padding:30px 0;margin-bottom:30px}.app-header h1{font-size:2.5rem;font-weight:700;margin-bottom:10px;color:#fff;text-shadow:0 2px 4px rgba(0,0,0,.1)}.app-header h1 i,.preview-card h3 i{margin-right:10px;color:var(--success-color)}.tagline{font-size:1.2rem;opacity:.9}.feature-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:25px;margin-bottom:40px}.feature-card{-webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--border-radius);padding:30px;text-align:center}.feature-card:hover{transform:translateY(-5px);box-shadow:0 15px 30px rgba(0,0,0,.2)}.feature-icon{font-size:2.5rem;color:var(--primary-light);margin-bottom:20px}.feature-card h3{font-size:1.3rem;margin-bottom:15px;color:#fff}.feature-card p{color:var(--light-gray);font-size:.95rem}.signature-container{display:grid;grid-template-columns:1fr;gap:30px;margin-bottom:40px}@media (min-width:992px){.signature-container{grid-template-columns:2fr 1fr}}.preview-card,.signature-card{-webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--border-radius);padding:25px}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.card-header h2{font-size:1.4rem;color:#fff}.card-header h2 i{margin-right:10px;color:var(--primary-light)}.pen-sizes{display:flex;gap:10px}.pen-size-btn{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:#fff;padding:5px 12px;border-radius:20px;font-size:.8rem;cursor:pointer}.preview-container,.signature-pad-container{background:#fff;box-shadow:inset 0 0 10px rgba(0,0,0,.1);overflow:hidden}.pen-size-btn.active{background:var(--primary-color);border-color:var(--primary-dark)}.signature-pad-container{position:relative;width:100%;height:250px;border-radius:var(--border-radius);margin-bottom:20px}#signature-pad{width:100%;height:100%;cursor:crosshair;touch-action:none}.signature-placeholder{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;color:var(--gray-color);pointer-events:none}.signature-placeholder i{font-size:3rem;margin-bottom:15px;opacity:.5}.signature-placeholder p{font-size:1.1rem;opacity:.7}.modal-actions,.signature-actions{display:flex;gap:15px}.action-btn,.download-btn,.modal-btn{padding:12px;font-size:1rem;gap:8px;font-weight:500;transition:var(--transition);cursor:pointer}.action-btn,.modal-btn{flex:1;border-radius:var(--border-radius);border:none;display:flex;align-items:center;justify-content:center}.action-btn i{font-size:1rem}.action-btn.primary{background:linear-gradient(to right,var(--primary-color),var(--primary-light));color:#fff;box-shadow:0 4px 15px rgba(67,97,238,.3)}.action-btn.primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(67,97,238,.4);background:linear-gradient(to right,var(--primary-dark),var(--primary-color))}.action-btn.secondary{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.2)}.download-btn,.preview-container{border-radius:var(--border-radius);display:flex;width:100%}.action-btn.secondary:hover{background:rgba(255,255,255,.2)}.download-btn:hover,.modal-btn.download-btn:hover{background:linear-gradient(to right,#38b6db,var(--success-color))}.preview-card h3{font-size:1.3rem;margin-bottom:20px;color:#fff}.preview-container{height:150px;margin-bottom:20px;justify-content:center;align-items:center}.signature-preview{width:100%;height:100%;display:flex;justify-content:center;align-items:center}.signature-preview p{color:var(--gray-color);font-size:.9rem;opacity:.7}.download-btn{border:none;background:linear-gradient(to right,var(--success-color),#38b6db);color:#fff;box-shadow:0 4px 15px rgba(76,201,240,.3);align-items:center;justify-content:center}.download-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(76,201,240,.4)}.download-btn:disabled{background:var(--gray-color);cursor:not-allowed;transform:none;box-shadow:none;opacity:.7}.instructions{background:var(--glass-bg);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:var(--border-radius);padding:30px;margin-bottom:40px;box-shadow:var(--glass-shadow)}.instructions h2{font-size:1.5rem;margin-bottom:20px;color:#fff}.instructions h2 i{margin-right:10px;color:var(--warning-color)}.instructions ol{padding-left:20px}.instructions li{margin-bottom:10px;color:var(--light-gray)}.app-footer{margin-top:50px;padding-top:30px;border-top:1px solid rgba(255,255,255,.1)}.footer-content{display:flex;flex-direction:column;gap:20px}.footer-links{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}.footer-links a{color:var(--light-gray);text-decoration:none;transition:var(--transition);display:flex;align-items:center;gap:5px}.footer-links a:hover{color:#fff}.footer-links a i{font-size:.9rem}.footer-copyright{text-align:center;color:var(--light-gray);font-size:.9rem}.modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.7);z-index:1000;justify-content:center;align-items:center}.modal-content{background:#fff;border-radius:var(--border-radius);width:90%;max-width:500px;overflow:hidden;box-shadow:0 15px 30px rgba(0,0,0,.3);animation:.3s modalFadeIn}@keyframes modalFadeIn{from{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.modal-header{padding:20px;background:linear-gradient(to right,var(--primary-color),var(--primary-light));color:#fff;display:flex;justify-content:space-between;align-items:center}.modal-header h3{font-size:1.3rem;font-weight:500;display:flex;align-items:center;gap:10px}.modal-header h3 i{font-size:1.5rem}.close-modal{font-size:1.8rem;cursor:pointer;transition:var(--transition)}.close-modal:hover{transform:rotate(90deg)}.modal-body{padding:25px;text-align:center}.modal-preview{width:100%;height:200px;background:var(--light-gray);border-radius:8px;margin-bottom:20px;display:flex;justify-content:center;align-items:center;overflow:hidden}.modal-preview img{max-width:100%;max-height:100%;object-fit:contain}.modal-body p{color:var(--dark-color);margin-bottom:20px;font-size:1.1rem}.modal-btn.download-btn{background:linear-gradient(to right,var(--success-color),#38b6db);color:#fff;text-decoration:none}.modal-btn.close-btn{background:var(--light-gray);color:var(--dark-color)}.modal-btn.close-btn:hover{background:#d1d1d1}.color-picker{display:flex;gap:8px;margin-left:15px}.color-option{width:24px;height:24px;border-radius:50%;border:2px solid #fff;cursor:pointer;transition:transform .2s}.color-option:hover{transform:scale(1.1)}.color-option.active{transform:scale(1.2);box-shadow:0 0 0 2px var(--primary-color)}@media (max-width:768px){.app-header h1{font-size:2rem}.feature-cards{grid-template-columns:1fr}.modal-actions,.signature-actions{flex-direction:column}.footer-links{flex-direction:column;align-items:center;gap:10px}.color-picker{margin-left:0;margin-top:10px}.card-header{flex-direction:column;align-items:flex-start}}