/* Modern Professional Blog Design */
:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary: #7c3aed;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    --light: #f8fafc;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --border-radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    color: var(--gray-700);
    line-height: 1.6;
    background-color: var(--gray-50);
    font-size: 1rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--gray-900);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.5px;
}

h1 { font-size: 3rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* Navigation */
.navbar {
    background: linear-gradient(135deg, var(--gray-900) 0%, #1a1f35 100%) !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.8) !important;
    font-weight: 500;
    margin: 0 0.5rem;
    padding: 0.5rem 0.75rem !important;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.navbar-nav .nav-link:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.1);
}

/* Main Container */
.container, .container-fluid {
    padding-top: 2rem;
    padding-bottom: 2rem;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 5rem 0;
    border-radius: var(--border-radius);
    margin-bottom: 3rem;
    box-shadow: 0 10px 40px rgba(37, 99, 235, 0.2);
    text-align: center;
}

.hero-section h1 {
    color: white;
    margin-bottom: 1rem;
    font-size: 3.5rem;
}

.hero-section p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.25rem;
}

.hero-image {
    max-width: 420px;
    width: 100%;
    height: auto;
    display: inline-block;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(16, 185, 129, 0.08);
}

/* Hero Carousel */
#heroCarousel {
    max-width: 900px;
    margin: 0 auto 2rem;
    border-radius: var(--border-radius);
    overflow: hidden;
}

#heroCarousel .carousel-inner {
    max-height: 350px;
    overflow: hidden;
}

#heroCarousel img {
    height: 350px;
    object-fit: cover;
    width: 100%;
}

#heroCarousel .carousel-control-prev,
#heroCarousel .carousel-control-next {
    width: 45px;
    height: 45px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    opacity: 0.7;
    transition: all 0.3s ease;
}

#heroCarousel .carousel-control-prev:hover,
#heroCarousel .carousel-control-next:hover {
    background: rgba(255, 255, 255, 0.6);
    opacity: 1;
}

/* Articles Carousel */
.articles-carousel {
    margin: 2rem auto;
    border-radius: var(--border-radius);
}

.articles-carousel .carousel-inner {
    border-radius: var(--border-radius);
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.5);
}

.articles-carousel .carousel-item {
    transition: opacity 0.8s ease-in-out;
}

.articles-carousel .carousel-item.active {
    opacity: 1;
}

.articles-carousel .carousel-control-prev,
.articles-carousel .carousel-control-next {
    width: 45px;
    height: 45px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(37, 99, 235, 0.6);
    border-radius: 50%;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.articles-carousel .carousel-control-prev:hover,
.articles-carousel .carousel-control-next:hover {
    background: rgba(37, 99, 235, 0.9);
    opacity: 1;
}

/* Article Cards */
.article-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
    border-color: var(--primary);
}

.article-card-image {
    position: relative;
    height: 240px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--gray-200) 0%, var(--gray-300) 100%);
}

.article-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.article-card:hover .article-card-image img {
    transform: scale(1.05);
}

.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--gray-200) 0%, var(--gray-300) 100%);
    color: var(--gray-500);
    font-size: 3rem;
}

.article-card-body {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.article-category {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    width: fit-content;
}

.article-excerpt {
    color: var(--gray-600);
    margin: 1rem 0;
    flex-grow: 1;
    line-height: 1.6;
}

.card-img-top {
    height: 240px;
    object-fit: cover;
    width: 100%;
}

.card-body {
    padding: 1.5rem;
    flex-grow: 1;
}

.card-title {
    font-weight: 600;
    margin-bottom: 0.75rem;
    line-height: 1.4;
    color: var(--gray-900);
}

.card-title a {
    color: var(--gray-900);
    text-decoration: none;
    transition: var(--transition);
}

.card-title a:hover {
    color: var(--primary);
}

.card-text {
    color: var(--gray-600);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.card-footer {
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    padding: 1rem 1.5rem;
}

/* Badges */
.badge {
    padding: 0.5rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    display: inline-block;
}

.badge-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
}

.badge-success {
    background: linear-gradient(135deg, var(--success) 0%, #34d399 100%);
    color: white;
}

.badge-warning {
    background: linear-gradient(135deg, var(--warning) 0%, #fbbf24 100%);
    color: white;
}

.badge-category {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    padding: 0.35em 0.65em;
    border-radius: 6px;
    font-size: 0.875em;
    font-weight: 500;
}

/* Buttons */
.btn {
    padding: 0.625rem 1.25rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white !important;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(37, 99, 235, 0.3);
}

.btn-outline-primary {
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline-primary:hover {
    background: var(--primary);
    color: white;
}

.btn-outline-secondary {
    border: 2px solid var(--gray-300);
    color: var(--gray-700);
}

.btn-outline-secondary:hover {
    background: var(--gray-100);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-900) !important;
}

.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #f87171 100%);
    color: white !important;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #dc2626 0%, var(--danger) 100%);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

/* Article Single Page */
.article-single {
    background: white;
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 2rem;
}

.article-single h1 {
    font-size: 2.75rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.article-header {
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--gray-200);
    margin-bottom: 2rem;
}

.article-content {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--gray-700);
}

.article-content p {
    margin-bottom: 1.5rem;
}

.article-content h2 {
    margin: 2rem 0 1rem;
    padding-top: 1rem;
    border-top: 2px solid var(--gray-200);
}

.article-content h3 {
    margin: 1.5rem 0 0.75rem;
    color: var(--primary);
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin: 2rem 0;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.article-content code {
    background: var(--gray-100);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'Monaco', 'Courier New', monospace;
    color: var(--danger);
    font-size: 0.9rem;
}

.article-content pre {
    background: var(--gray-900);
    color: #d4d4d4;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin: 1.5rem 0;
}

.article-content ul, .article-content ol {
    margin: 1.5rem 0 1.5rem 2rem;
}

.article-content li {
    margin-bottom: 0.5rem;
}

.article-content blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    color: var(--gray-600);
    font-style: italic;
}

/* Article Meta */
.article-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--gray-200);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.article-meta i {
    color: var(--primary);
}

/* Breadcrumb */
.breadcrumb {
    background: transparent;
    padding: 0;
    margin-bottom: 1.5rem;
}

.breadcrumb-item {
    color: var(--gray-600);
}

.breadcrumb-item a {
    color: var(--primary);
}

.breadcrumb-item.active {
    color: var(--gray-700);
    font-weight: 600;
}

/* Cards */
.card {
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.card-header {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    border-bottom: 2px solid var(--gray-200);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    padding: 1rem 1.5rem;
}

/* Sidebar */
.sidebar-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.sidebar-card h5 {
    color: var(--gray-900);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--primary);
}

.sidebar-card ul {
    list-style: none;
}

.sidebar-card li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.sidebar-card li:last-child {
    border-bottom: none;
}

.sidebar-card a {
    color: var(--gray-600);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    padding: 0.5rem 0;
}

.sidebar-card a:hover {
    color: var(--primary);
    padding-left: 0.5rem;
}

/* Search Form */
.search-form .input-group {
    display: flex;
    gap: 0;
}

.search-form .form-control {
    flex: 1;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    border: 1px solid var(--gray-300);
}

.search-form .btn-primary {
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    border: 1px solid var(--primary);
    padding: 0.5rem 1rem;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: auto;
}

.search-form .btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

/* Archive List */
.archive-list {
    list-style: none;
    padding: 0;
}

/* Archive Cards */
.article-archive-card {
    transition: var(--transition);
    border-radius: var(--border-radius) !important;
}

.article-archive-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12) !important;
    transform: translateY(-2px);
}

.article-archive-image {
    height: 200px;
    overflow: hidden;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
}

.article-archive-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.article-archive-card:hover .article-archive-image img {
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .article-archive-image {
        height: 150px;
    }
}

.archive-item {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.archive-item:last-child {
    border-bottom: none;
}

.archive-item a {
    color: var(--gray-700);
    text-decoration: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.archive-item a:hover {
    color: var(--primary);
}

/* Pagination */
.pagination {
    gap: 0.5rem;
}

.page-link {
    border: 2px solid var(--gray-300);
    color: var(--primary);
    border-radius: var(--border-radius);
    transition: var(--transition);
    padding: 0.5rem 1rem;
}

.page-link:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-color: var(--primary);
}

/* Alerts */
.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: 1.25rem 1.5rem;
}

.alert-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(52, 211, 153, 0.1) 100%);
    color: var(--success);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(248, 113, 113, 0.1) 100%);
    color: var(--danger);
}

.alert-info {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1) 0%, rgba(34, 211, 238, 0.1) 100%);
    color: var(--info);
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--gray-900) 0%, #1a1f35 100%);
    color: rgba(255, 255, 255, 0.8);
    padding: 3rem 0 1rem;
    margin-top: 3rem;
}

footer h5 {
    color: white;
    margin-bottom: 1rem;
}

footer a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

footer a:hover {
    color: var(--primary);
}

footer .social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    margin-right: 0.5rem;
    transition: var(--transition);
}

footer .social-links a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

/* Tables */
.table {
    background: white;
    border-collapse: collapse;
}

.table thead {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    border-bottom: 2px solid var(--gray-300);
}

.table th {
    color: var(--gray-900);
    font-weight: 600;
    padding: 1rem;
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--gray-200);
}

.table tbody tr:hover {
    background: var(--gray-50);
}

/* Forms */
.form-control, .form-select {
    border: 2px solid var(--gray-300);
    border-radius: var(--border-radius);
    padding: 0.625rem 0.875rem;
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

/* Modal */
.modal-content {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.modal-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    border: none;
}

/* Admin Sidebar */
.admin-sidebar {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    padding: 0;
    height: fit-content;
    position: sticky;
    top: 100px;
}

.admin-sidebar .nav-link {
    color: var(--gray-700);
    padding: 0.75rem 1.25rem;
    border-left: 3px solid transparent;
    transition: var(--transition);
    border-radius: 0;
}

.admin-sidebar .nav-link:hover {
    background: var(--gray-100);
    color: var(--primary);
    border-left-color: var(--primary);
}

.admin-sidebar .nav-link.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    border-left-color: var(--primary);
}

/* Stat Cards */
.stat-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.stat-icon.primary { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); color: white; }
.stat-icon.success { background: linear-gradient(135deg, var(--success) 0%, #34d399 100%); color: white; }
.stat-icon.warning { background: linear-gradient(135deg, var(--warning) 0%, #fbbf24 100%); color: white; }
.stat-icon.info { background: linear-gradient(135deg, var(--info) 0%, #22d3ee 100%); color: white; }

.stat-card h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

.stat-card p {
    color: var(--gray-600);
    font-weight: 500;
}

/* Search Form */
.search-form {
    position: relative;
}

.search-form input {
    padding-right: 3rem;
}

.search-form button {
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    border: none;
    background: none;
    color: var(--gray-500);
    padding: 0 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .hero-section {
        padding: 3rem 0;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .article-single {
        padding: 1.5rem;
    }
    
    .admin-sidebar {
        position: relative;
        top: auto;
        margin-bottom: 1.5rem;
    }
    
    .article-meta {
        flex-wrap: wrap;
    }
    
    .navbar-nav {
        padding-top: 1rem;
    }
    
    .article-card {
        margin-bottom: 1.5rem;
    }
    
    .card-img-top {
        height: 150px;
    }
}

@media (max-width: 576px) {
    .container {
        padding-top: 1rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .article-card-image {
        height: 180px;
    }
}