/* Clean Academic Journal Theme - TAMDE Inspired */

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #059669;
    --info-color: #0284c7;
    --warning-color: #d97706;
    --danger-color: #dc2626;
    --light-color: #f8fafc;
    --dark-color: #1e293b;
    --text-color: #334155;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Base Styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: #ffffff;
}

/* Header Styles */
.modern-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.modern-header.scrolled {
    box-shadow: var(--shadow-lg);
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: var(--dark-color);
    transition: all 0.3s ease;
}

.header-brand:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.header-logo {
    height: 60px;
    width: auto;
    object-fit: contain;
}

.header-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    line-height: 1.2;
    color: var(--primary-color);
}

.header-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
    font-weight: 400;
    max-width: 400px;
}

.language-switcher {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.lang-link {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    font-size: 0.875rem;
}

.lang-link:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    text-decoration: none;
}

.lang-link.active {
    color: white;
    background: var(--primary-color);
    border-color: var(--primary-color);
}

/* Navigation Styles */
.modern-nav {
    background: white;
    border-bottom: 1px solid var(--border-color);
    padding: 0.5rem 0;
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.nav-item {
    margin: 0;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.25rem;
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--primary-color);
    background: var(--light-color);
    text-decoration: none;
    transform: translateY(-1px);
}

.nav-link.active {
    color: white;
    background: var(--primary-color);
    box-shadow: var(--shadow);
}

.nav-link.active:hover {
    background: var(--primary-hover);
    color: white;
}

/* Button Styles for Header */
.btn-modern {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.875rem;
}

.btn-modern.btn-primary {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.btn-modern.btn-primary:hover {
    background: var(--primary-hover);
    color: white;
    text-decoration: none;
    border-color: var(--primary-hover);
}

.btn-modern.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-modern.btn-outline:hover {
    background: var(--primary-color);
    color: white;
    text-decoration: none;
}

.btn-modern.btn-secondary {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

.btn-modern.btn-secondary:hover {
    background: #475569;
    color: white;
    text-decoration: none;
    border-color: #475569;
}

/* Academic Header Section */
.academic-header-section {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 80px 0 60px 0;
    border-bottom: 1px solid var(--border-color);
}

.journal-title {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(37, 99, 235, 0.1);
}

.journal-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.journal-description .lead {
    font-size: 1.25rem;
    color: var(--text-color);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

.journal-actions {
    margin-top: 2rem;
}

.journal-actions .btn {
    font-weight: 500;
    padding: 12px 24px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

/* Search Section */
.search-section {
    background-color: var(--light-color);
    padding: 40px 0;
    border-bottom: 1px solid var(--border-color);
}

.search-form .form-control {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 20px;
    font-size: 1.1rem;
    transition: all 0.2s ease;
}

.search-form .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-form .btn {
    border-radius: 8px;
    padding: 12px 20px;
    font-weight: 500;
}

/* User Status and Auth Sections */
.user-status-section, .auth-prompt-section {
    padding: 20px 0;
}

.user-status-section .alert,
.auth-prompt-section .alert {
    border-radius: 12px;
    padding: 20px;
    margin: 0;
}

/* Quick Access Cards */
.quick-access-section {
    padding: 60px 0;
    background-color: #ffffff;
}

.quick-access-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px 25px;
    text-align: center;
    transition: all 0.3s ease;
    height: 100%;
}

.quick-access-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.quick-access-card .card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.quick-access-card .card-icon i {
    font-size: 24px;
    color: white;
}

.quick-access-card .card-title {
    color: var(--dark-color);
    font-weight: 600;
    margin-bottom: 15px;
}

.quick-access-card .card-text {
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.5;
}

/* Current Issue Section */
.current-issue-section {
    padding: 60px 0;
    background-color: var(--light-color);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 20px;
}

.issue-info .badge {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.articles-list {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-top: 30px;
}

.article-item {
    padding: 25px 30px;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s ease;
}

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

.article-item:hover {
    background-color: #f8fafc;
}

.article-number {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.article-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark-color);
    line-height: 1.4;
}

.article-title a {
    color: inherit;
    transition: color 0.2s ease;
}

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

.article-authors {
    color: var(--text-muted);
    font-size: 1rem;
    font-style: italic;
}

.article-meta {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.meta-separator {
    margin: 0 10px;
    opacity: 0.5;
}

.article-stats {
    display: flex;
    gap: 15px;
    align-items: center;
    justify-content: center;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.article-actions .btn {
    font-weight: 500;
    border-radius: 6px;
}

/* Information Section */
.information-section {
    padding: 60px 0;
    background-color: #ffffff;
}

.information-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    height: 100%;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s ease;
}

.information-card:hover {
    box-shadow: var(--shadow-md);
}

.information-card .card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
    display: flex;
    align-items: center;
}

.information-card .card-content {
    color: var(--text-color);
    line-height: 1.7;
}

.metrics-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.metric-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.metric-label {
    font-weight: 500;
    color: var(--text-muted);
}

.metric-value {
    font-weight: 600;
    color: var(--dark-color);
}

.external-links .btn {
    font-weight: 500;
    border-radius: 6px;
}

/* Button Styles */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

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

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

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

.btn-outline-danger {
    color: var(--danger-color);
    border-color: var(--danger-color);
}

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

/* Bootstrap Compatible Utilities */
.text-primary { color: var(--primary-color) !important; }
.bg-primary { background-color: var(--primary-color) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-success { color: var(--success-color) !important; }
.text-info { color: var(--info-color) !important; }
.text-danger { color: var(--danger-color) !important; }

.fs-4 { font-size: 1.5rem !important; }
.fs-5 { font-size: 1.25rem !important; }
.fs-6 { font-size: 1rem !important; }

.mb-1 { margin-bottom: 0.25rem !important; }
.mb-2 { margin-bottom: 0.5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.mb-5 { margin-bottom: 3rem !important; }

.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }

.me-1 { margin-right: 0.25rem !important; }
.me-2 { margin-right: 0.5rem !important; }
.me-3 { margin-right: 1rem !important; }

.ms-3 { margin-left: 1rem !important; }

.px-3 { padding-left: 1rem !important; padding-right: 1rem !important; }
.py-2 { padding-top: 0.5rem !important; padding-bottom: 0.5rem !important; }

.d-flex { display: flex !important; }
.d-grid { display: grid !important; }
.align-items-center { align-items: center !important; }
.justify-content-center { justify-content: center !important; }
.text-center { text-align: center !important; }
.text-end { text-align: right !important; }

.gap-2 { gap: 0.5rem !important; }
.gap-4 { gap: 1.5rem !important; }

.border-0 { border: 0 !important; }
.shadow-sm { box-shadow: var(--shadow-sm) !important; }

.lead { font-size: 1.25rem; font-weight: 300; }

/* Responsive Design */
@media (max-width: 768px) {
    .journal-title {
        font-size: 2.5rem;
    }

    .journal-subtitle {
        font-size: 1.25rem;
    }

    .journal-description .lead {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .quick-access-card {
        margin-bottom: 20px;
    }

    .article-item {
        padding: 20px 15px;
    }

    .article-title {
        font-size: 1.1rem;
    }

    .article-stats {
        justify-content: flex-start;
        margin-top: 10px;
    }

    .information-card {
        margin-bottom: 20px;
    }

    .btn-group {
        flex-direction: column;
        width: 100%;
    }

    .btn-group .btn {
        margin-bottom: 5px;
    }

    /* Header responsive */
    .header-title {
        font-size: 1.25rem;
    }

    .header-subtitle {
        font-size: 0.75rem;
        display: none; /* Hide on mobile for space */
    }

    .language-switcher {
        gap: 0.25rem;
    }

    .lang-link {
        padding: 0.375rem 0.75rem;
        font-size: 0.75rem;
    }

    .nav-list {
        gap: 0.25rem;
    }

    .nav-link {
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
    }

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

@media (max-width: 576px) {
    .academic-header-section {
        padding: 60px 0 40px 0;
    }

    .journal-title {
        font-size: 2rem;
    }

    .journal-subtitle {
        font-size: 1.1rem;
    }

    .search-section {
        padding: 30px 0;
    }

    .search-form .d-flex {
        flex-direction: column;
        gap: 15px;
    }

    .search-form .btn {
        margin-left: 0 !important;
    }

    .quick-access-section {
        padding: 40px 0;
    }

    .current-issue-section {
        padding: 40px 0;
    }

    .information-section {
        padding: 40px 0;
    }

    .journal-actions .btn {
        display: block;
        width: 100%;
        margin-bottom: 10px;
    }
}

/* Blog Listing */
.blog-page {
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.blog-hero {
    max-width: 720px;
    margin: 0 auto;
}

.blog-hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    background: rgba(37, 99, 235, 0.12);
    color: #2563eb;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.75rem;
}

.blog-hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #0f172a;
    margin-top: 1rem;
}

.blog-hero-subtitle {
    max-width: 640px;
    font-size: 1rem;
    line-height: 1.7;
}

.blog-grid {
    margin-top: 3rem;
}

.blog-card {
    border-radius: 1rem;
    overflow: hidden;
    position: relative;
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 45px rgba(15, 23, 42, 0.15);
}

.blog-card-thumb {
    overflow: hidden;
    border-bottom: 1px solid #e2e8f0;
}

.blog-card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.35s ease;
}

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

.blog-card-placeholder {
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        45deg,
        #f1f5f9,
        #f1f5f9 12px,
        #e2e8f0 12px,
        #e2e8f0 24px
    );
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.blog-card-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    background: #2563eb;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.25);
    display: inline-flex;
    align-items: center;
}

.blog-card-body {
    padding: 1.75rem;
}

.blog-card-category {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: #475569;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
}

.blog-card-title {
    color: #0f172a;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.blog-card-title a {
    color: inherit;
    transition: color 0.2s ease;
}

.blog-card-title a:hover {
    color: #2563eb;
}

.blog-card-excerpt {
    line-height: 1.7;
    font-size: 0.95rem;
}

.blog-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.85rem;
}

.blog-card-meta span {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.blog-card .btn {
    font-weight: 600;
    padding: 0.5rem 1.1rem;
}

@media (max-width: 991px) {
    .blog-hero-title {
        font-size: 2rem;
    }

    .blog-card-body {
        padding: 1.5rem;
    }
}

@media (max-width: 575px) {
    .blog-hero-title {
        font-size: 1.75rem;
    }

    .blog-hero-subtitle {
        font-size: 0.95rem;
    }

    .blog-card-body {
        padding: 1.25rem;
    }
}

/* Blog Detail */
.blog-detail-page {
    background: #f8fafc;
    padding-top: 1.75rem;
}

.blog-detail-hero {
    position: relative;
    margin-top: 0;
    padding: 120px 0 80px 0;
    background-size: cover;
    background-position: center;
    color: #0f172a;
    border-radius: 0;
    overflow: hidden;
}

.blog-detail-hero.has-image {
    color: #fff;
}

.blog-detail-hero.no-image {
    background: linear-gradient(135deg, #1d4ed8, #3b82f6);
    color: #fff;
}

.blog-detail-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.blog-detail-hero.has-image .blog-detail-overlay {
    opacity: 1;
}

.blog-detail-breadcrumb {
    position: relative;
    margin-bottom: 1.5rem;
}

.blog-detail-breadcrumb .breadcrumb {
    background: transparent;
    padding: 0;
    margin: 0;
    color: inherit;
}

.blog-detail-breadcrumb .breadcrumb-item a {
    color: inherit;
    opacity: 0.85;
}

.blog-detail-breadcrumb .breadcrumb-item + .breadcrumb-item::before {
    color: inherit;
    opacity: 0.6;
}

.blog-detail-hero-content {
    position: relative;
    max-width: 760px;
}

.blog-detail-category {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.15);
    color: inherit;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.75rem;
    backdrop-filter: blur(8px);
}

.blog-detail-hero.no-image .blog-detail-category {
    background: rgba(255, 255, 255, 0.2);
}

.blog-detail-title {
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.2;
    margin: 1.5rem 0;
}

.blog-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    font-size: 0.95rem;
}

.blog-detail-meta span {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.9;
}

.blog-detail-body {
    margin-top: 0;
    padding-top: 2.5rem;
    padding-bottom: 80px;
}

.blog-article {
    background: #fff;
    border-radius: 1.25rem;
    padding: 3rem;
    box-shadow: 0 20px 45px rgba(15, 23, 42, 0.08);
}

.blog-article-figure {
    margin: 0 0 2rem 0;
}

.blog-article-image {
    width: 100%;
    border-radius: 1rem;
    object-fit: cover;
}

.blog-article-caption {
    font-size: 0.85rem;
    margin-top: 0.75rem;
}

.blog-article-content {
    font-size: 1.05rem;
    line-height: 1.9;
    color: #1e293b;
}

.blog-article-content h2,
.blog-article-content h3,
.blog-article-content h4 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
    color: #0f172a;
}

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

.blog-article-content blockquote {
    border-left: 4px solid #2563eb;
    padding-left: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    color: #475569;
}

.blog-article-share {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.blog-article-share .btn {
    min-width: 38px;
    text-align: center;
}

.blog-related-section {
    margin-top: 4rem;
}

.blog-related-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #0f172a;
}

.blog-related-card {
    border-radius: 1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
}

.blog-related-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 30px rgba(15, 23, 42, 0.12);
}

.blog-related-thumb {
    overflow: hidden;
}

.blog-related-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.blog-related-placeholder {
    width: 100%;
    height: 100%;
    font-size: 1.5rem;
    background: #f1f5f9;
}

.blog-related-card-title a {
    color: #0f172a;
    transition: color 0.2s ease;
}

.blog-related-card-title a:hover {
    color: #2563eb;
}

.blog-related-meta {
    font-size: 0.85rem;
    margin-top: 0.75rem;
}

@media (max-width: 1199px) {
    .blog-detail-title {
        font-size: 2.4rem;
    }

    .blog-article {
        padding: 2.5rem;
    }
}

@media (max-width: 767px) {
    .blog-detail-hero {
        padding: 90px 0 55px 0;
    }

    .blog-detail-body {
        padding-top: 2.25rem;
    }

    .blog-detail-title {
        font-size: 2rem;
    }

    .blog-detail-meta {
        gap: 0.75rem;
        font-size: 0.9rem;
    }

    .blog-article {
        padding: 1.75rem;
    }
}

@media (max-width: 575px) {
    .blog-detail-title {
        font-size: 1.65rem;
    }

    .blog-detail-hero {
        padding: 80px 0 45px 0;
        border-radius: 1.25rem;
    }

    .blog-detail-body {
        padding-top: 1.75rem;
    }

    .blog-article {
        padding: 1.5rem;
    }

    .blog-article-share {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
}