:root{--primary: #3b82f6;--primary-dark: #2563eb;--secondary: #64748b;--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--info: #0ea5e9;--light: #f8fafc;--dark: #1e293b;--gray: #64748b;--border: #e2e8f0;--bg-primary: #ffffff;--bg-secondary: #f1f5f9;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--transition: all .3s ease}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background-color:var(--bg-secondary);color:var(--dark);line-height:1.6}.project-milestones-app{min-height:100vh;background-color:var(--bg-primary)}.app-header{background:#fff;border-bottom:1px solid var(--border);padding:1rem 2rem;box-shadow:var(--shadow-sm)}.header-content{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;gap:.75rem}.logo-icon{color:var(--primary);width:2rem;height:2rem}.logo h1{font-size:1.5rem;font-weight:700;color:var(--dark)}.logo p{font-size:.875rem;color:var(--gray);margin-top:.125rem}.header-actions{display:flex;gap:.75rem}.add-project-btn{background:var(--primary);color:#fff;border:none;padding:.625rem 1rem;border-radius:var(--radius-md);font-weight:500;cursor:pointer;display:flex;align-items:center;gap:.5rem;transition:var(--transition)}.add-project-btn:hover{background:var(--primary-dark)}.app-body{display:flex;min-height:calc(100vh - 80px);max-width:1200px;margin:0 auto}.project-sidebar{width:300px;background:#fff;border-right:1px solid var(--border);padding:1.5rem 1rem;overflow-y:auto}.sidebar-title{font-size:1.125rem;font-weight:600;color:var(--dark);margin-bottom:1.5rem;padding-left:.5rem}.project-list{display:flex;flex-direction:column;gap:.75rem}.project-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);padding:1rem;text-align:left;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:.75rem;position:relative}.project-item:hover{border-color:var(--primary);transform:translateY(-1px);box-shadow:var(--shadow-sm)}.project-item.active{border-color:var(--primary);background:#3b82f60d}.project-icon{font-size:1.25rem;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--primary);color:#fff;border-radius:var(--radius-md);flex-shrink:0}.project-info{flex:1;min-width:0}.project-info h4{font-size:.95rem;font-weight:600;color:var(--dark);margin-bottom:.25rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.project-progress{display:flex;align-items:center;gap:.5rem;margin-top:.5rem}.progress-bar{flex:1;height:6px;background:var(--bg-secondary);border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:var(--primary);border-radius:3px;transition:width .3s ease}.project-progress span{font-size:.75rem;color:var(--gray);font-weight:500;min-width:2rem;text-align:right}.project-actions{display:flex;gap:.25rem;margin-left:.5rem}.action-btn{background:transparent;border:1px solid var(--border);border-radius:4px;width:28px;height:28px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition);flex-shrink:0}.action-btn:hover{border-color:var(--gray);transform:scale(1.1)}.edit-btn{color:var(--warning)}.edit-btn:hover{background:#f59e0b1a;border-color:var(--warning)}.delete-btn{color:var(--danger)}.delete-btn:hover{background:#ef44441a;border-color:var(--danger)}.main-content{flex:1;padding:2rem;background:var(--bg-secondary);overflow-y:auto}.project-header{background:#fff;border-radius:var(--radius-lg);padding:2rem;margin-bottom:2rem;box-shadow:var(--shadow-md);display:flex;align-items:center;gap:1.5rem;position:relative}.project-badge{font-size:2.5rem;width:80px;height:80px;display:flex;align-items:center;justify-content:center;background:var(--primary);color:#fff;border-radius:var(--radius-lg);flex-shrink:0}.project-details{flex:1}.project-title{font-size:1.5rem;font-weight:700;color:var(--dark);margin-bottom:.5rem}.project-description{color:var(--gray);margin-bottom:1rem;line-height:1.5}.project-meta{display:flex;gap:1.5rem;flex-wrap:wrap}.meta-item{display:flex;align-items:center;gap:.5rem;color:var(--gray);font-size:.9rem}.overall-progress{flex-shrink:0;width:120px;height:120px}.progress-circle{width:100%;height:100%;position:relative}.progress-circle svg{width:100%;height:100%}.progress-text{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center}.progress-value{display:block;font-size:1.25rem;font-weight:700;color:var(--dark)}.progress-label{display:block;font-size:.75rem;color:var(--gray);margin-top:.125rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:2rem}.stat-card{background:#fff;border-radius:var(--radius-md);padding:1.5rem;display:flex;align-items:center;gap:1rem;box-shadow:var(--shadow-sm);transition:var(--transition)}.stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.stat-icon{width:2.5rem;height:2.5rem;border-radius:50%;display:flex;align-items:center;justify-content:center}.stat-icon.completed{background:#10b9811a;color:var(--success)}.stat-icon.in-progress{background:#3b82f61a;color:var(--primary)}.stat-icon.pending{background:#6b72801a;color:var(--gray)}.stat-icon.total{background:#0ea5e91a;color:var(--info)}.stat-content{flex:1}.stat-value{font-size:1.5rem;font-weight:700;color:var(--dark);margin:0}.stat-label{font-size:.875rem;color:var(--gray);margin:0}.milestones-section{background:#fff;border-radius:var(--radius-lg);padding:2rem;box-shadow:var(--shadow-md)}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.section-title{display:flex;align-items:center;gap:.75rem;font-size:1.25rem;font-weight:600;color:var(--dark);margin:0}.add-milestone-btn{background:var(--primary);color:#fff;border:none;padding:.625rem 1rem;border-radius:var(--radius-md);font-weight:500;cursor:pointer;display:flex;align-items:center;gap:.5rem;transition:var(--transition)}.add-milestone-btn:hover{background:var(--primary-dark)}.timeline{display:flex;flex-direction:column;gap:1.5rem;position:relative}.timeline:before{content:"";position:absolute;left:20px;top:0;bottom:0;width:2px;background:var(--border);z-index:1}.milestone-item{display:flex;align-items:flex-start;gap:1rem;position:relative}.milestone-marker{position:relative;z-index:2;margin-top:.25rem}.marker-icon{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:3px solid white;transition:var(--transition)}.marker-icon.pending{background:#6b728033;color:var(--gray)}.marker-icon.in_progress{background:#3b82f633;color:var(--primary)}.marker-icon.completed{background:#10b98133;color:var(--success)}.marker-icon.delayed{background:#ef444433;color:var(--danger)}.milestone-card{flex:1;background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);padding:1.25rem;position:relative;box-shadow:var(--shadow-sm);transition:var(--transition)}.milestone-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md)}.milestone-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:.75rem}.milestone-title{flex:1;min-width:0}.milestone-title h4{font-size:1rem;font-weight:600;color:var(--dark);margin:0 0 .5rem}.milestone-actions{display:flex;gap:.25rem;margin-left:.5rem;margin-bottom:.5rem}.milestone-badges{display:flex;gap:.5rem;flex-wrap:wrap}.status-badge,.priority-badge{padding:.25rem .5rem;border-radius:12px;font-size:.75rem;font-weight:500;white-space:nowrap}.milestone-date{font-size:.875rem;color:var(--gray);font-weight:500}.milestone-description{color:var(--gray);margin-bottom:.75rem;line-height:1.5}.milestone-tags{display:flex;gap:.5rem;flex-wrap:wrap}.tag{background:var(--bg-secondary);color:var(--gray);padding:.25rem .5rem;border-radius:12px;font-size:.75rem;font-weight:500}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:60vh;text-align:center;color:var(--gray);gap:1rem}.empty-state h2{color:var(--dark);font-size:1.5rem}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem}.modal-content{background:#fff;border-radius:var(--radius-lg);width:100%;max-width:600px;box-shadow:var(--shadow-lg);max-height:90vh;overflow-y:auto}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem;border-bottom:1px solid var(--border)}.modal-header h2{margin:0;color:var(--dark);font-size:1.25rem}.close-modal{background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--gray);padding:.25rem;border-radius:4px;transition:var(--transition)}.close-modal:hover{background:var(--bg-secondary);color:var(--dark)}.modal-body{padding:1.5rem}.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;margin-bottom:1rem}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem;color:var(--dark);font-weight:500;font-size:.875rem}.form-group input,.form-group select,.form-group textarea{width:100%;padding:.75rem;border:1px solid var(--border);border-radius:var(--radius-md);font-size:.875rem;background:#fff;color:var(--dark);transition:var(--transition)}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #3b82f61a}.form-group textarea{resize:vertical;min-height:100px}.form-actions{display:flex;gap:1rem;justify-content:flex-end;margin-top:1.5rem;padding-top:1.5rem;border-top:1px solid var(--border)}.btn{padding:.75rem 1.5rem;border-radius:var(--radius-md);font-size:.875rem;font-weight:500;cursor:pointer;transition:var(--transition);border:1px solid transparent}.btn-cancel{background:var(--bg-secondary);color:var(--dark);border-color:var(--border)}.btn-cancel:hover{background:var(--gray);color:#fff}.btn-submit{background:var(--primary);color:#fff}.btn-submit:hover{background:var(--primary-dark)}@media (max-width: 768px){.header-content{flex-direction:column;gap:1rem;text-align:center}.app-body{flex-direction:column;min-height:auto}.project-sidebar{width:100%;max-height:300px;border-right:none;border-bottom:1px solid var(--border)}.project-header{flex-direction:column;text-align:center;align-items:stretch}.project-badge{align-self:center;margin-bottom:1rem}.overall-progress{align-self:center;margin-top:1rem}.project-meta{justify-content:center}.section-header{flex-direction:column;align-items:stretch;gap:1rem}.milestone-header{flex-direction:column;align-items:stretch;gap:.75rem}.form-row{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}.main-content{padding:1rem}.timeline:before{left:10px}.milestone-marker{margin-left:-10px}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:linear-gradient(135deg,#1a1a2e,#16213e,#0f3460);color:#e4e4e7;min-height:100vh}#root{min-height:100vh}