:root{--primary-blue:#084F72;--secondary-blue:#D68110;--light-blue:#D9EdFC;--accent-orange:#0F93D5;--text-dark:#222222;--text-light:#565656;--border-light:#565656;--bg-light:#FCEDD9;--bg-white:#FAFAFA;--bg-gradient-start:#FCEDD980;--bg-gradient-end:#71440980}@media (prefers-color-scheme:dark){:root{--primary-blue:#084F72;--secondary-blue:#D68110;--light-blue:#D9EdFC;--accent-orange:#0F93D5;--text-dark:#222222;--text-light:#565656;--border-light:#565656;--bg-light:#FCEDD9;--bg-white:#FAFAFA;--bg-gradient-start:#FCEDD980;--bg-gradient-end:#72440980}}body{font-family:Lexend,Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:linear-gradient(180deg,var(--bg-gradient-start),var(--bg-gradient-end));color:var(--text-dark);line-height:1.6;overflow-x:hidden}.navbar{background:var(--primary-blue)!important;box-shadow:0 2px 4px rgba(0,0,0,.1);padding:1rem 0}@media (prefers-color-scheme:dark){.navbar{box-shadow:0 2px 4px rgba(0,0,0,.3)}}.navbar-brand{font-weight:700;font-size:1.4rem!important;color:#fff!important}.navbar-brand img{filter:brightness(0) invert(1)}@media (max-width:991.98px){.navbar>.container-lg{flex-wrap:wrap;align-items:center}.navbar-brand{font-size:1.05rem!important;flex:1 1 auto;min-width:0;max-width:calc(100% - 4.5rem);margin-right:.5rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.navbar-toggler{margin-left:auto;flex:0 0 auto}.navbar-collapse{flex-basis:100%}}.nav-link{color:rgba(255,255,255,.9)!important;font-weight:500;transition:all .3s ease}.nav-link:hover{color:var(--light-blue)!important}.nav-item.active .nav-link{color:#fff!important;background-color:rgba(255,255,255,.15);border-radius:.275rem}.header-section{background:var(--bg-white);border-radius:.75rem;box-shadow:0 4px 6px rgba(0,0,0,.05);margin-top:2rem;padding:2.5rem;border-left:4px solid var(--secondary-blue)}@media (prefers-color-scheme:dark){.header-section{box-shadow:0 4px 6px rgba(0,0,0,.2)}}.header-section h1{color:var(--primary-blue);font-weight:700;font-size:2.5rem;margin-bottom:1rem}.header-section .lead{color:var(--text-light);font-size:1.25rem;font-weight:400}.header-section-breadcrumb{background:var(--bg-white);border-radius:.75rem;box-shadow:0 4px 6px rgba(0,0,0,.05);margin-top:0;padding:1.25rem;border-left:4px solid var(--secondary-blue)}@media (prefers-color-scheme:dark){.header-section-breadcrumb{box-shadow:0 4px 6px rgba(0,0,0,.2)}}.breadcrumb{background-color:transparent;padding:0;margin:0}.breadcrumb-item{padding-left:8px}.breadcrumb-item a{color:var(--secondary-blue);text-decoration:none}.breadcrumb-item a:hover{color:var(--accent-orange);text-decoration:none}.breadcrumb-item.active{color:var(--text-light)}.breadcrumb-item+.breadcrumb-item::before{color:var(--text-light)}.search-form{background:var(--bg-white);border-radius:.75rem;padding:2rem;box-shadow:0 2px 4px rgba(0,0,0,.05);border:1px solid var(--border-light);margin-bottom:2rem}@media (prefers-color-scheme:dark){.search-form{box-shadow:0 2px 4px rgba(0,0,0,.2)}}.search-form .form-control{border:2px solid var(--border-light);border-radius:.33rem;padding:.75rem 1rem;font-size:1rem;transition:all .3s ease;background-color:var(--bg-white);color:var(--text-dark)}.search-form .form-control:focus{border-color:var(--secondary-blue);box-shadow:0 0 0 .2rem rgba(30,64,175,.25);background-color:var(--bg-white);color:var(--text-dark)}.results-info{background:rgba(249,115,22,.1);border-left:4px solid var(--accent-orange);padding:1rem 1.5rem;border-radius:.33rem;margin-bottom:2rem}@media (prefers-color-scheme:dark){.results-info{background:rgba(251,146,60,.2)}}.results-info p{margin:0;font-weight:500;color:var(--text-dark)}.list-group-item{border:1px solid var(--border-light);border-radius:.75rem!important;margin-bottom:1.5rem;padding:2rem;background:var(--bg-white);box-shadow:0 2px 4px rgba(0,0,0,.05);transition:all .3s ease}.list-group-item:hover{box-shadow:0 8px 25px rgba(0,0,0,.1);transform:translateY(-2px)}@media (prefers-color-scheme:dark){.list-group-item{box-shadow:0 2px 4px rgba(0,0,0,.2)}.list-group-item:hover{box-shadow:0 8px 25px rgba(0,0,0,.3)}}.article-title{font-weight:600!important;color:var(--primary-blue)!important;font-size:1.25rem;line-height:1.4;margin-bottom:1rem!important}.article-title a{color:inherit;text-decoration:none;transition:color .3s ease}.article-title a:hover{color:var(--secondary-blue)!important;text-decoration:none}.journal-name{font-style:italic!important;color:var(--accent-orange)!important;font-weight:600;font-size:.95rem}.article-date{color:var(--text-light)!important;font-size:.9rem;font-weight:500}.article-abstract{font-size:1rem!important;color:var(--text-dark)!important;line-height:1.6;margin-top:1rem!important;margin-bottom:1.5rem!important}.btn-primary{background-color:var(--secondary-blue);border-color:var(--secondary-blue);border-radius:.33rem;font-weight:600;padding:.75rem 1.5rem;transition:all .3s ease}.btn-primary:hover{background-color:var(--primary-blue);border-color:var(--primary-blue);transform:translateY(-1px)}.btn-outline-primary{color:var(--secondary-blue);border-color:var(--secondary-blue);border-radius:.33rem;font-weight:500;transition:all .3s ease}.btn-outline-primary:hover{background-color:var(--secondary-blue);border-color:var(--secondary-blue);color:#fff}.btn-outline-secondary{color:var(--text-light);border-color:var(--border-light);border-radius:.33rem;font-weight:500}.btn-outline-secondary:hover{background-color:var(--text-light);border-color:var(--text-light);color:var(--bg-white)}.btn-group-xs>.btn,.btn-xs{padding:.375rem .75rem!important;font-size:.75rem!important;border-radius:.75rem!important;font-weight:500;margin-right:.5rem;margin-bottom:.5rem;background-color:rgba(30,58,138,.1);border-color:rgba(30,58,138,.2);color:var(--primary-blue);transition:all .3s ease}@media (prefers-color-scheme:dark){.btn-group-xs>.btn,.btn-xs{background-color:rgba(59,130,246,.2);border-color:rgba(59,130,246,.3)}}.btn-xs:hover{background-color:var(--primary-blue);border-color:var(--primary-blue);color:#fff}.card{border:1px solid var(--border-light);border-radius:.75rem;box-shadow:0 2px 4px rgba(0,0,0,.05);overflow:hidden;background-color:var(--bg-white)}@media (prefers-color-scheme:dark){.card{box-shadow:0 2px 4px rgba(0,0,0,.2)}}.card-header{background:var(--primary-blue)!important;border-bottom:none;padding:1.25rem 1.5rem}.card-header h5{color:#fff!important;font-weight:600;margin:0;font-size:1.1rem}.card-header h4{color:#fff!important;font-weight:600;margin:0;font-size:1.25rem}.card-header h4.text-orange,.card-header h5.text-orange{color:#f8b585!important}.card-header h4.text-white,.card-header h5.text-white{color:#fff!important}.card-body{padding:1.5rem;background-color:var(--bg-white)}.card-body ul li{margin-bottom:1rem!important;padding-bottom:1rem;border-bottom:1px solid var(--border-light)}.card-body ul li:last-child{border-bottom:none;margin-bottom:0!important;padding-bottom:0}.card-body a{color:var(--secondary-blue);text-decoration:none;font-weight:500;display:flex;justify-content:space-between;align-items:center;transition:color .3s ease}.card-body a:hover{color:var(--accent-orange);text-decoration:none}.badge-secondary{background-color:var(--accent-orange)!important;color:#fff;font-weight:500}.pagination{margin-top:3rem}.page-link{color:var(--secondary-blue);border-color:var(--border-light);border-radius:.33rem!important;margin:0 .25rem;font-weight:500;transition:all .3s ease;background-color:var(--bg-white)}.page-link:hover{color:#fff;background-color:var(--secondary-blue);border-color:var(--secondary-blue)}.page-item.active .page-link{background-color:var(--primary-blue);border-color:var(--primary-blue);color:#fff}.page-item.disabled .page-link{color:var(--text-light);background-color:var(--bg-light);border-color:var(--border-light)}footer{background:var(--primary-blue)!important;color:#fff;margin-top:4rem}footer a{color:var(--light-blue);text-decoration:none}footer a:hover{color:#fff;text-decoration:underline}.newsletter-card{border:none;box-shadow:0 4px 15px rgba(0,0,0,.1);overflow:hidden}.newsletter-card .card-header{background:linear-gradient(135deg,var(--primary-blue),var(--secondary-blue));border-bottom:none}.newsletter-card .image-container{position:relative}.newsletter-card .image-container::after{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(to bottom,rgba(249,115,22,.2),rgba(30,58,138,.4));pointer-events:none}.newsletter-card .btn-primary{background-color:var(--accent-orange);border-color:var(--accent-orange);color:#fff;font-weight:600;transition:all .3s ease;text-transform:uppercase;letter-spacing:.5px;font-size:.9rem}.newsletter-card .btn-primary:hover{background-color:var(--primary-blue);border-color:var(--primary-blue);color:#fff;transform:translateY(-1px);box-shadow:0 4px 12px rgba(249,115,22,.2)}.newsletter-card .card-body{background:#fff}.newsletter-card p{color:var(--text-dark);font-size:.95rem;line-height:1.6}.highlight{background-color:var(--accent-orange);color:#fff;padding:0 2px;border-radius:2px}@media (prefers-color-scheme:dark){.highlight{background-color:#fbbf24;color:#111827}}.text-accent{color:var(--accent-orange)!important}.bg-gradient{background:linear-gradient(135deg,var(--primary-blue),var(--secondary-blue))}@media (prefers-color-scheme:dark){.form-control{background-color:var(--bg-white);border-color:var(--border-light);color:var(--text-dark)}.form-control:focus{background-color:var(--bg-white);border-color:var(--secondary-blue);color:var(--text-dark);box-shadow:0 0 0 .2rem rgba(96,165,250,.25)}.form-control::placeholder{color:var(--text-light)}}@media (prefers-color-scheme:dark){.alert-info{background-color:rgba(59,130,246,.1);border-color:rgba(59,130,246,.2);color:var(--text-dark)}.alert-danger{background-color:rgba(239,68,68,.1);border-color:rgba(239,68,68,.2);color:var(--text-dark)}}@media (max-width:768px){.header-section{padding:2rem 1.5rem;margin-top:1rem}.header-section h1{font-size:2rem}.search-form{padding:1.5rem}.list-group-item{padding:1.5rem}.card-body{padding:1rem}}.popularity-stars .fa-star{color:#dee2e6;font-size:.75rem}.popularity-stars .fa-star.star-active{color:#ffc107}.popularity-stars .view-count{font-size:.7rem;color:#6c757d;margin-left:2px}