diff --git a/app/static/css/style.css b/app/static/css/style.css
index 010a605..bbf93cf 100644
--- a/app/static/css/style.css
+++ b/app/static/css/style.css
@@ -1,132 +1,587 @@
-/* Custom styles for LEGO Instructions Manager */
+/* Enhanced styles for LEGO Instructions Manager */
 
+/* ===== CSS Variables ===== */
 :root {
+    /* LEGO Brand Colors */
     --lego-red: #d11013;
+    --lego-red-dark: #a00d10;
     --lego-yellow: #ffd700;
+    --lego-yellow-bright: #ffed4e;
     --lego-blue: #0055bf;
+    --lego-blue-light: #2b7fdb;
+    
+    /* Modern Palette */
+    --primary-gradient: linear-gradient(135deg, #d11013 0%, #ff4757 100%);
+    --secondary-gradient: linear-gradient(135deg, #0055bf 0%, #0abde3 100%);
+    --success-gradient: linear-gradient(135deg, #10ac84 0%, #1dd1a1 100%);
+    --warning-gradient: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
+    
+    /* Neutrals */
+    --gray-50: #f8f9fa;
+    --gray-100: #e9ecef;
+    --gray-200: #dee2e6;
+    --gray-300: #ced4da;
+    --gray-600: #6c757d;
+    --gray-800: #343a40;
+    --gray-900: #212529;
+    
+    /* Shadows */
+    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
+    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
+    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
+    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.18);
+    
+    /* Border Radius */
+    --radius-sm: 0.375rem;
+    --radius-md: 0.5rem;
+    --radius-lg: 0.75rem;
+    --radius-xl: 1rem;
+    
+    /* Transitions */
+    --transition-fast: 0.2s ease;
+    --transition-base: 0.3s ease;
+    --transition-slow: 0.5s ease;
 }
 
+/* ===== Base Styles ===== */
 body {
     min-height: 100vh;
     display: flex;
     flex-direction: column;
+    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+    background: linear-gradient(to bottom, #ffffff 0%, var(--gray-50) 100%);
+    color: var(--gray-900);
 }
 
 main {
     flex: 1;
+    padding-top: 2rem;
+    padding-bottom: 4rem;
+}
+
+/* ===== Enhanced Navbar ===== */
+.navbar {
+    background: var(--primary-gradient) !important;
+    box-shadow: var(--shadow-md);
+    padding: 1rem 0;
+    border-bottom: 3px solid var(--lego-red-dark);
 }
 
-/* Navbar customization */
 .navbar-brand {
-    font-weight: bold;
+    font-weight: 800;
     font-size: 1.5rem;
+    letter-spacing: -0.5px;
+    transition: transform var(--transition-fast);
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
 }
 
-/* Card hover effects */
+.navbar-brand:hover {
+    transform: translateY(-2px);
+}
+
+.navbar-brand i {
+    font-size: 1.8rem;
+    animation: pulse 2s ease-in-out infinite;
+}
+
+@keyframes pulse {
+    0%, 100% { transform: scale(1); }
+    50% { transform: scale(1.1); }
+}
+
+.nav-link {
+    font-weight: 500;
+    transition: all var(--transition-fast);
+    padding: 0.5rem 1rem !important;
+    border-radius: var(--radius-md);
+}
+
+.nav-link:hover {
+    background-color: rgba(255, 255, 255, 0.15);
+    transform: translateY(-1px);
+}
+
+.navbar .dropdown-menu {
+    border: none;
+    box-shadow: var(--shadow-lg);
+    border-radius: var(--radius-md);
+    padding: 0.5rem;
+}
+
+.navbar .dropdown-item {
+    border-radius: var(--radius-sm);
+    padding: 0.6rem 1rem;
+    transition: all var(--transition-fast);
+}
+
+.navbar .dropdown-item:hover {
+    background: var(--gray-100);
+    transform: translateX(4px);
+}
+
+/* ===== Hero Section ===== */
+.display-3 {
+    font-weight: 800;
+    letter-spacing: -2px;
+    background: var(--primary-gradient);
+    -webkit-background-clip: text;
+    -webkit-text-fill-color: transparent;
+    background-clip: text;
+}
+
+.lead {
+    font-size: 1.25rem;
+    line-height: 1.8;
+    color: var(--gray-600);
+    max-width: 800px;
+    margin: 0 auto;
+}
+
+/* ===== Enhanced Buttons ===== */
+.btn {
+    font-weight: 600;
+    border-radius: var(--radius-md);
+    padding: 0.6rem 1.5rem;
+    transition: all var(--transition-base);
+    border: none;
+    position: relative;
+    overflow: hidden;
+}
+
+.btn::before {
+    content: '';
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    width: 0;
+    height: 0;
+    border-radius: 50%;
+    background: rgba(255, 255, 255, 0.3);
+    transform: translate(-50%, -50%);
+    transition: width 0.6s, height 0.6s;
+}
+
+.btn:hover::before {
+    width: 300px;
+    height: 300px;
+}
+
+.btn-danger {
+    background: var(--primary-gradient);
+    box-shadow: var(--shadow-md);
+}
+
+.btn-danger:hover {
+    transform: translateY(-2px);
+    box-shadow: var(--shadow-lg);
+}
+
+.btn-outline-secondary,
+.btn-outline-warning {
+    border-width: 2px;
+    font-weight: 600;
+}
+
+.btn-outline-secondary:hover {
+    background: var(--gray-800);
+    border-color: var(--gray-800);
+    transform: translateY(-2px);
+}
+
+.btn-lg {
+    padding: 0.8rem 2rem;
+    font-size: 1.1rem;
+}
+
+/* ===== Card Enhancements ===== */
 .card {
-    transition: transform 0.2s, box-shadow 0.2s;
+    border: none;
+    border-radius: var(--radius-lg);
+    box-shadow: var(--shadow-sm);
+    transition: all var(--transition-base);
+    overflow: hidden;
+    background: white;
 }
 
 .card:hover {
-    transform: translateY(-5px);
-    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;
+    transform: translateY(-8px);
+    box-shadow: var(--shadow-xl);
 }
 
-/* Set card image */
+.card-header {
+    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
+    border-bottom: 2px solid var(--gray-200);
+    font-weight: 700;
+    padding: 1.25rem 1.5rem;
+}
+
+.card-header h5 {
+    margin: 0;
+    font-size: 1.1rem;
+    color: var(--gray-800);
+}
+
+.card-body {
+    padding: 1.5rem;
+}
+
+.card-footer {
+    background: transparent;
+    border-top: 1px solid var(--gray-200);
+    padding: 1rem 1.5rem;
+}
+
+/* ===== Statistics Cards ===== */
+.stat-card {
+    border-left: 4px solid transparent;
+    background: white;
+    position: relative;
+    overflow: hidden;
+}
+
+.stat-card::before {
+    content: '';
+    position: absolute;
+    top: 0;
+    right: 0;
+    width: 100px;
+    height: 100px;
+    background: var(--gray-50);
+    border-radius: 50%;
+    transform: translate(30%, -30%);
+    transition: all var(--transition-base);
+}
+
+.stat-card:hover::before {
+    transform: translate(30%, -30%) scale(1.5);
+}
+
+.stat-card:nth-child(1) {
+    border-left-color: var(--lego-blue);
+}
+
+.stat-card:nth-child(2) {
+    border-left-color: #10ac84;
+}
+
+.stat-card:nth-child(3) {
+    border-left-color: var(--lego-red);
+}
+
+.stat-card:nth-child(4) {
+    border-left-color: var(--lego-yellow);
+}
+
+.stat-card h2 {
+    font-size: 2.5rem;
+    font-weight: 800;
+    margin: 0;
+    background: var(--primary-gradient);
+    -webkit-background-clip: text;
+    -webkit-text-fill-color: transparent;
+    background-clip: text;
+}
+
+.stat-card h6 {
+    font-weight: 600;
+    text-transform: uppercase;
+    font-size: 0.75rem;
+    letter-spacing: 1px;
+    color: var(--gray-600);
+}
+
+.stat-card i.display-4 {
+    font-size: 3rem;
+    opacity: 0.15;
+    position: relative;
+    z-index: 1;
+}
+
+/* ===== Set Card Images ===== */
 .set-image {
     height: 200px;
     object-fit: contain;
-    background-color: #f8f9fa;
+    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
+    padding: 1rem;
+    transition: all var(--transition-base);
 }
 
-/* Dashboard clickable thumbnails */
 .dashboard a .set-image,
 .dashboard a .card-img-top {
-    transition: opacity 0.3s, transform 0.3s;
+    transition: all var(--transition-base);
 }
 
 .dashboard a:hover .set-image,
 .dashboard a:hover .card-img-top {
-    opacity: 0.85;
-    transform: scale(1.02);
+    transform: scale(1.05);
+    filter: brightness(1.1);
 }
 
-.dashboard a:hover img {
-    filter: brightness(1.05);
+/* ===== Badges ===== */
+.badge {
+    font-weight: 600;
+    padding: 0.4em 0.8em;
+    border-radius: var(--radius-sm);
+    font-size: 0.85rem;
 }
 
-/* Instruction thumbnails */
+.badge-theme {
+    background: var(--secondary-gradient);
+    color: white;
+}
+
+.badge-year {
+    background: var(--warning-gradient);
+    color: var(--gray-900);
+    box-shadow: var(--shadow-sm);
+}
+
+.bg-warning {
+    background: var(--warning-gradient) !important;
+}
+
+/* ===== List Groups ===== */
+.list-group-item {
+    border: none;
+    border-bottom: 1px solid var(--gray-200);
+    padding: 1rem 1.25rem;
+    transition: all var(--transition-fast);
+}
+
+.list-group-item:hover {
+    background: var(--gray-50);
+    padding-left: 1.5rem;
+}
+
+.list-group-item:last-child {
+    border-bottom: none;
+}
+
+.list-group-flush .list-group-item:first-child {
+    border-top: none;
+}
+
+.badge.rounded-pill {
+    padding: 0.5em 1em;
+    font-weight: 700;
+}
+
+/* ===== Feature Cards (Home Page) ===== */
+.shadow-sm {
+    box-shadow: var(--shadow-md) !important;
+    border-radius: var(--radius-lg);
+    transition: all var(--transition-base);
+}
+
+.shadow-sm:hover {
+    transform: translateY(-8px);
+    box-shadow: var(--shadow-xl) !important;
+}
+
+.shadow-sm i.display-1 {
+    font-size: 4rem;
+    margin-bottom: 1rem;
+}
+
+.shadow-sm h3 {
+    font-weight: 700;
+    color: var(--gray-800);
+}
+
+/* ===== Instruction Thumbnails ===== */
 .instruction-thumbnail {
     width: 150px;
     height: 150px;
     object-fit: cover;
     cursor: pointer;
-    transition: transform 0.2s;
+    border-radius: var(--radius-md);
+    transition: all var(--transition-base);
+    box-shadow: var(--shadow-sm);
 }
 
 .instruction-thumbnail:hover {
-    transform: scale(1.05);
+    transform: scale(1.1) rotate(2deg);
+    box-shadow: var(--shadow-lg);
+    z-index: 10;
 }
 
-/* File upload area */
+/* ===== File Upload Area ===== */
 .upload-area {
-    border: 2px dashed #dee2e6;
-    border-radius: 0.5rem;
+    border: 3px dashed var(--gray-300);
+    border-radius: var(--radius-lg);
     padding: 3rem;
     text-align: center;
-    transition: all 0.3s;
+    transition: all var(--transition-base);
+    background: white;
 }
 
 .upload-area:hover {
     border-color: var(--lego-red);
-    background-color: #f8f9fa;
+    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
+    transform: scale(1.02);
 }
 
 .upload-area.dragover {
     border-color: var(--lego-red);
-    background-color: #fff3cd;
+    background: linear-gradient(135deg, #fff3cd 0%, white 100%);
+    box-shadow: var(--shadow-lg);
+    transform: scale(1.05);
 }
 
-/* Badge styling */
-.badge-theme {
-    background-color: var(--lego-blue);
+/* ===== Pagination ===== */
+.pagination {
+    gap: 0.5rem;
 }
 
-.badge-year {
-    background-color: var(--lego-yellow);
-    color: #000;
-}
-
-/* Stats cards */
-.stat-card {
-    border-left: 4px solid var(--lego-red);
-}
-
-/* Search bar */
-.search-container {
-    max-width: 600px;
-    margin: 0 auto 2rem;
-}
-
-/* Pagination */
 .pagination .page-link {
     color: var(--lego-red);
+    border: 2px solid var(--gray-300);
+    border-radius: var(--radius-sm);
+    font-weight: 600;
+    transition: all var(--transition-fast);
+}
+
+.pagination .page-link:hover {
+    background: var(--primary-gradient);
+    color: white;
+    border-color: var(--lego-red);
+    transform: translateY(-2px);
 }
 
 .pagination .page-item.active .page-link {
-    background-color: var(--lego-red);
+    background: var(--primary-gradient);
     border-color: var(--lego-red);
+    box-shadow: var(--shadow-md);
 }
 
-/* Loading spinner */
+/* ===== Footer ===== */
+footer {
+    background: linear-gradient(135deg, var(--gray-800) 0%, var(--gray-900) 100%);
+    color: var(--gray-300);
+    padding: 2rem 0;
+    margin-top: auto;
+    border-top: 4px solid var(--lego-red);
+}
+
+footer p {
+    margin: 0;
+    font-size: 0.9rem;
+}
+
+footer .badge {
+    font-size: 0.8rem;
+    padding: 0.4em 0.8em;
+}
+
+/* ===== Flash Messages ===== */
+.alert {
+    border: none;
+    border-radius: var(--radius-lg);
+    padding: 1rem 1.5rem;
+    box-shadow: var(--shadow-md);
+    border-left: 4px solid;
+    animation: slideIn 0.3s ease;
+}
+
+@keyframes slideIn {
+    from {
+        opacity: 0;
+        transform: translateY(-20px);
+    }
+    to {
+        opacity: 1;
+        transform: translateY(0);
+    }
+}
+
+.alert-success {
+    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
+    border-left-color: #28a745;
+}
+
+.alert-danger {
+    background: linear-gradient(135deg, #f8d7da 0%, #f5c6cb 100%);
+    border-left-color: #dc3545;
+}
+
+.alert-warning {
+    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
+    border-left-color: var(--lego-yellow);
+}
+
+.alert-info {
+    background: linear-gradient(135deg, #d1ecf1 0%, #bee5eb 100%);
+    border-left-color: #17a2b8;
+}
+
+/* ===== Search Container ===== */
+.search-container {
+    max-width: 700px;
+    margin: 0 auto 2.5rem;
+}
+
+.search-container .form-control {
+    border-radius: var(--radius-lg);
+    padding: 0.8rem 1.5rem;
+    border: 2px solid var(--gray-300);
+    transition: all var(--transition-fast);
+    font-size: 1rem;
+}
+
+.search-container .form-control:focus {
+    border-color: var(--lego-red);
+    box-shadow: 0 0 0 0.2rem rgba(209, 16, 19, 0.15);
+}
+
+/* ===== Loading Spinner ===== */
 .spinner-wrapper {
     display: flex;
     justify-content: center;
     align-items: center;
-    min-height: 200px;
+    min-height: 300px;
 }
 
-/* Responsive adjustments */
+.spinner-border {
+    width: 3rem;
+    height: 3rem;
+    border-width: 0.3rem;
+}
+
+/* ===== Empty States ===== */
+.text-center.py-5 {
+    padding: 4rem 2rem !important;
+}
+
+.text-center i.display-1 {
+    font-size: 5rem;
+    opacity: 0.3;
+    margin-bottom: 1rem;
+}
+
+/* ===== MOC Badge ===== */
+.bg-warning.text-dark {
+    background: var(--warning-gradient) !important;
+    box-shadow: var(--shadow-sm);
+}
+
+/* ===== Form Controls ===== */
+.form-control,
+.form-select {
+    border-radius: var(--radius-md);
+    border: 2px solid var(--gray-300);
+    padding: 0.6rem 1rem;
+    transition: all var(--transition-fast);
+}
+
+.form-control:focus,
+.form-select:focus {
+    border-color: var(--lego-red);
+    box-shadow: 0 0 0 0.2rem rgba(209, 16, 19, 0.15);
+}
+
+/* ===== Responsive Adjustments ===== */
 @media (max-width: 768px) {
     .set-image {
         height: 150px;
@@ -136,11 +591,82 @@ main {
         width: 100px;
         height: 100px;
     }
-}
-
-/* Print styles for instructions */
-@media print {
-    .navbar, .btn, footer {
-        display: none;
+    
+    .stat-card h2 {
+        font-size: 2rem;
+    }
+    
+    .display-3 {
+        font-size: 2.5rem;
+    }
+    
+    .navbar-brand {
+        font-size: 1.25rem;
     }
 }
+
+@media (max-width: 576px) {
+    .btn-lg {
+        padding: 0.6rem 1.5rem;
+        font-size: 1rem;
+    }
+    
+    .card-body {
+        padding: 1rem;
+    }
+    
+    .stat-card h2 {
+        font-size: 1.75rem;
+    }
+}
+
+/* ===== Print Styles ===== */
+@media print {
+    .navbar, .btn, footer, .alert {
+        display: none;
+    }
+    
+    .card {
+        box-shadow: none;
+        border: 1px solid var(--gray-300);
+    }
+}
+
+/* ===== Accessibility ===== */
+.btn:focus,
+.form-control:focus,
+.form-select:focus {
+    outline: 3px solid var(--lego-yellow);
+    outline-offset: 2px;
+}
+
+/* ===== LEGO Brick Pattern (Optional Background) ===== */
+body::before {
+    content: '';
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background-image: 
+        radial-gradient(circle at 25% 25%, rgba(209, 16, 19, 0.03) 0%, transparent 50%),
+        radial-gradient(circle at 75% 75%, rgba(0, 85, 191, 0.03) 0%, transparent 50%);
+    pointer-events: none;
+    z-index: -1;
+}
+
+/* ===== Smooth Scrolling ===== */
+html {
+    scroll-behavior: smooth;
+}
+
+/* ===== Selection Color ===== */
+::selection {
+    background: var(--lego-red);
+    color: white;
+}
+
+::-moz-selection {
+    background: var(--lego-red);
+    color: white;
+}
\ No newline at end of file