:root{--primary-color: #2C3E50;--primary-dark: #1A2530;--primary-light: #3E5066;--secondary-color: #3498DB;--accent-color: #2ECC71;--text-primary: #333333;--text-secondary: #666666;--background-light: #F5F7FA;--background-white: #FFFFFF;--border-color: #E0E0E0;--shadow: 0 2px 10px rgba(0, 0, 0, .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:var(--background-light);color:var(--text-primary);line-height:1.6}h1,h2,h3,h4,h5,h6{color:var(--primary-color);font-weight:600}h1{font-size:2rem;margin-bottom:1rem}h2{font-size:1.5rem;margin-bottom:1rem}.btn{background-color:var(--primary-color);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:5px;cursor:pointer;font-weight:500;transition:all .3s ease;text-decoration:none;display:inline-block}.btn:hover{background-color:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow)}.btn-primary{background-color:var(--primary-color)}.btn-primary:hover{background-color:var(--primary-dark)}.card{background:var(--background-white);border-radius:12px;box-shadow:var(--shadow);padding:1.5rem;margin-bottom:1.5rem}.form-group{margin-bottom:1rem}.form-control{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:5px;font-size:1rem;transition:border-color .3s}.form-control:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #2c3e501a}.nav-link{color:var(--primary-color);text-decoration:none;padding:.75rem 1.5rem;margin:.25rem 0;transition:background .3s;display:block}.nav-link:hover{background:#2c3e501a}.sidenav{background:var(--primary-color)!important}.sidenav-header{border-bottom:1px solid rgba(255,255,255,.1)}.sidenav-nav{display:flex;flex-direction:column}.dashboard-header,.stat-card{background:var(--primary-color);color:#fff}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000}.modal-content{background-color:var(--background-white);border-radius:8px;box-shadow:var(--shadow);padding:2rem;max-width:500px;width:90%;position:relative}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:.5rem;border-bottom:1px solid var(--border-color)}.modal-body{margin-bottom:1.5rem}.modal-footer{display:flex;justify-content:flex-end;gap:.5rem}.close{background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text-secondary)}.close:hover{color:var(--primary-color)}@media(max-width:768px){.card{padding:1rem}h1{font-size:1.5rem}h2{font-size:1.25rem}}.status-cumplido{background-color:#2ecc71;color:#fff;padding:.25rem .5rem;border-radius:4px;font-size:.875rem;font-weight:500}.status-pendiente{background-color:#f39c12;color:#fff;padding:.25rem .5rem;border-radius:4px;font-size:.875rem;font-weight:500}.status-vencido{background-color:#e74c3c;color:#fff;padding:.25rem .5rem;border-radius:4px;font-size:.875rem;font-weight:500}