/* ===== Dark Theme ===== */
:root {
    --color-primary: #e0e0e0;
    --color-secondary: #9e9e9e;
    --color-accent: #A2521D;
    --color-accent-hover: #C4632A;
    --color-background: #1E1E1E;
    --color-surface: #2d2d2d;
    --color-text: #e0e0e0;
    --color-text-muted: #9e9e9e;
    --color-border: #3d3d3d;
    --color-content-box: #F0F0F0;
    --color-content-text: #333333;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --transition-base: 0.3s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    padding-top: 70px; /* Account for fixed navbar */
}

main {
    min-height: calc(100vh - 70px);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p {
    color: var(--color-text);
    margin-bottom: 1rem;
}

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

a:hover {
    color: var(--color-accent-hover);
}

/* ===== Navigation ===== */
.navbar-main {
    background-color: var(--color-background);
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar-main .navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-primary);
}

.navbar-main .nav-link {
    color: var(--color-text);
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: color var(--transition-base);
}

.navbar-main .nav-link:hover,
.navbar-main .nav-link:focus {
    color: var(--color-accent);
}

/* Dropdown styling */
.navbar-main .dropdown-menu {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    border-radius: 0.5rem;
    padding: 1rem;
    min-width: 280px;
}

.dropdown-menu {
    background-color: var(--color-surface);
    border-color: var(--color-border);
}

.dropdown-item {
    color: var(--color-text);
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: var(--color-background);
    color: var(--color-accent);
}

.dropdown-search {
    margin-bottom: 0.75rem;
}

.dropdown-search .form-control {
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
}

.dropdown-search .form-control:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.15);
}

.dropdown-divider {
    border-top: 1px solid var(--color-border);
    margin: 0.75rem 0;
}

.dropdown-header {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0;
}

.dropdown-item {
    color: var(--color-text);
    padding: 0.5rem 0;
    border-radius: 0.25rem;
}

.dropdown-item:hover {
    background-color: var(--color-surface);
    color: var(--color-accent);
}

/* ===== Sections ===== */
.section {
    padding: 5rem 0;
}

.section-header {
    padding-top: 2rem;
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-background) 0%, var(--color-surface) 100%);
}

.section-articles {
    background-color: var(--color-background);
}

.section-about {
    background-color: var(--color-surface);
}

.section-footer {
    background-color: #0d0d0d;
    color: var(--color-text);
    padding: 3rem 0;
}

.section-footer a {
    color: rgba(255, 255, 255, 0.8);
}

.section-footer a:hover {
    color: #ffffff;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    position: relative;
    display: inline-block;
    padding-bottom: 1rem;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--color-accent);
    border-radius: 2px;
}

/* ===== Article Cards ===== */
.article-card-link {
    text-decoration: none;
    display: block;
}

.article-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    margin-bottom: 1.5rem;
}

.article-card-link:hover .article-card,
.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.article-card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: var(--color-surface);
}

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

.article-card-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
}

.article-card-text {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 0.75rem;
}

.article-card-meta {
    font-size: 0.75rem;
    color: var(--color-secondary);
}

/* ===== Floating Side Menu Button ===== */
.side-menu-toggle {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    background-color: var(--color-accent);
    color: #ffffff;
    border: none;
    padding: 1rem 0.75rem;
    border-radius: 0.5rem 0 0 0.5rem;
    cursor: pointer;
    z-index: 1001;
    transition: background-color var(--transition-base), padding-right var(--transition-base);
    box-shadow: var(--shadow-md);
}

.side-menu-toggle:hover {
    background-color: var(--color-accent-hover);
    padding-right: 1rem;
}

.side-menu-toggle svg {
    width: 20px;
    height: 20px;
}

/* ===== Side Panel ===== */
.side-panel {
    position: fixed;
    top: 0;
    right: -320px;
    width: 320px;
    height: 100vh;
    background-color: var(--color-background);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
    z-index: 1002;
    transition: right var(--transition-base);
    overflow-y: auto;
}

.side-panel.open {
    right: 0;
}

.side-panel-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.side-panel-header h3 {
    margin: 0;
    font-size: 1.25rem;
}

.side-panel-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: 0;
    line-height: 1;
}

.side-panel-close:hover {
    color: var(--color-text);
}

.side-panel-body {
    padding: 1.5rem;
}

.side-panel-section {
    margin-bottom: 1.5rem;
}

.side-panel-section h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

.side-panel-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.side-panel-links li {
    margin-bottom: 0.5rem;
}

.side-panel-links a {
    color: var(--color-text);
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--color-border);
}

.side-panel-links a:hover {
    color: var(--color-accent);
}

/* Side panel overlay */
.side-panel-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.3);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.side-panel-overlay.open {
    opacity: 1;
    visibility: visible;
}

.side-panel-tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.side-panel-tag-cloud .badge {
    font-size: 0.8rem;
    padding: 0.4em 0.7em;
    transition: background-color var(--transition-base);
}

.side-panel-tag-cloud .badge:hover {
    background-color: var(--color-accent) !important;
}

.side-panel-articles-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.side-panel-articles-list li {
    margin-bottom: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.side-panel-articles-list li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.side-panel-articles-list a {
    color: var(--color-text);
    text-decoration: none;
    display: block;
    line-height: 1.4;
    transition: color var(--transition-base);
}

.side-panel-articles-list a:hover {
    color: var(--color-accent);
}

.side-panel-links a {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ===== Buttons ===== */
.btn-primary {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: #ffffff;
}

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

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

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

/* ===== Utilities ===== */
.text-muted {
    color: var(--color-text-muted) !important;
}

/* ===== Dark Mode Bootstrap Overrides ===== */
.form-control {
    background-color: var(--color-surface);
    border-color: var(--color-border);
    color: var(--color-text);
}

.form-control:focus {
    background-color: var(--color-surface);
    border-color: var(--color-accent);
    color: var(--color-text);
}

.form-control::placeholder {
    color: var(--color-text-muted);
}

.navbar-toggler {
    border-color: var(--color-border);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(224, 224, 224, 0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
    .navbar-main .navbar-collapse {
        background-color: var(--color-background);
        padding: 1rem;
        margin-top: 1rem;
        border-radius: 0.5rem;
        box-shadow: var(--shadow-sm);
    }

    .section-header {
        min-height: auto;
        padding-top: 2rem;
        padding-bottom: 3rem;
    }
}

@media (max-width: 767.98px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

    .section {
        padding: 3rem 0;
    }

    .side-panel {
        width: 100%;
        right: -100%;
    }
}

/* ===== Article Detail Page ===== */
.article-detail {
    padding-top: 2rem;
    padding-bottom: 4rem;
}

.article-detail .container {
    max-width: 900px;
}

.article-detail-box {
    background-color: var(--color-content-box);
    color: var(--color-content-text);
    border-radius: 0.75rem;
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
}

.article-detail-header {
    margin-bottom: 2rem;
}

.article-detail-meta {
    margin-bottom: 1rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
}

.article-detail-date {
    color: #666666;
    font-size: 0.875rem;
}

.article-detail-categories {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.article-detail-category {
    background-color: var(--color-accent);
    color: #ffffff;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.article-detail-title {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--color-content-text);
}

.article-detail-source {
    color: #666666;
    font-size: 0.875rem;
}

.article-detail-source a {
    color: var(--color-accent);
}

.article-detail-tags {
    margin-top: 0.75rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.article-detail-tags .badge {
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.35em 0.75em;
    transition: background-color 0.2s ease;
}

.article-detail-tags .badge:hover {
    background-color: var(--color-accent) !important;
}

.article-detail-category {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

.article-detail-category:hover {
    text-decoration: underline;
}

.article-detail-image {
    margin: 0 0 2rem;
}

.article-detail-image img {
    width: 100%;
    height: auto;
    border-radius: 0.5rem;
}

.article-detail-content {
    margin-bottom: 2rem;
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-content-text);
}

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

.article-detail-content h1,
.article-detail-content h2,
.article-detail-content h3,
.article-detail-content h4,
.article-detail-content h5,
.article-detail-content h6 {
    color: var(--color-content-text);
}

.article-detail-content a {
    color: var(--color-accent);
}

/* ===== Share Buttons ===== */
.article-share {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: #e0e0e0;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.article-share-label {
    font-weight: 500;
    color: var(--color-content-text);
}

.article-share-buttons {
    display: flex;
    gap: 0.5rem;
}

.share-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    transition: transform var(--transition-base), background-color var(--transition-base);
}

.share-btn:hover {
    transform: scale(1.1);
}

.share-btn svg {
    width: 20px;
    height: 20px;
}

.share-btn-twitter {
    background-color: #000000;
    color: #ffffff;
}

.share-btn-facebook {
    background-color: #1877f2;
    color: #ffffff;
}

.share-btn-linkedin {
    background-color: #0a66c2;
    color: #ffffff;
}

.share-btn-copy {
    background-color: #cccccc;
    color: var(--color-content-text);
    position: relative;
}

.share-btn-copy:hover {
    background-color: var(--color-accent);
    color: #ffffff;
}

.copy-feedback {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-content-text);
    color: #ffffff;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.copy-feedback.show {
    opacity: 1;
    visibility: visible;
}

/* ===== Related Articles ===== */
.article-related {
    margin-bottom: 2rem;
}

.article-related h2 {
    margin-bottom: 1.5rem;
    color: var(--color-content-text);
}

.article-related-card {
    display: block;
    background-color: #ffffff;
    border: 1px solid #dddddd;
    border-radius: 0.5rem;
    overflow: hidden;
    text-decoration: none;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    margin-bottom: 1rem;
}

.article-related-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.article-related-card img {
    width: 100%;
    height: 120px;
    object-fit: cover;
}

.article-related-card-body {
    padding: 1rem;
}

.article-related-card h3 {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    color: var(--color-content-text);
    line-height: 1.4;
}

.article-related-date {
    font-size: 0.75rem;
    color: #666666;
}

/* ===== Comments Section ===== */
.article-comments {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #dddddd;
}

.article-comments h2 {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #dddddd;
    color: var(--color-content-text);
}

.comment-form-wrapper {
    margin-bottom: 2rem;
}

.comment-form textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid #cccccc;
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    min-height: 100px;
    background-color: #ffffff;
    color: var(--color-content-text);
}

.comment-form textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 0.2rem rgba(162, 82, 29, 0.15);
}

.comment-form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.75rem;
}

.comment-form-note {
    font-size: 0.875rem;
    color: #666666;
}

.comments-list {
    margin-top: 2rem;
}

.comments-empty {
    text-align: center;
    color: #666666;
    padding: 2rem;
}

.comment {
    padding: 1rem 0;
    border-bottom: 1px solid #dddddd;
}

.comment:last-child {
    border-bottom: none;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.comment-author {
    font-weight: 600;
    color: var(--color-content-text);
}

.comment-date {
    font-size: 0.75rem;
    color: #666666;
}

.comment-body {
    color: var(--color-content-text);
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

.comment-actions {
    margin-top: 0.5rem;
}

.comment-reply-btn {
    background: none;
    border: none;
    color: var(--color-accent);
    font-size: 0.875rem;
    cursor: pointer;
    padding: 0;
}

.comment-reply-btn:hover {
    text-decoration: underline;
}

.comment-replies {
    margin-left: 1.5rem;
    padding-left: 1rem;
    border-left: 2px solid #cccccc;
    margin-top: 1rem;
}

/* ===== Article Detail Responsive ===== */
@media (max-width: 767.98px) {
    .article-detail {
        padding-top: 1rem;
    }

    .article-detail-box {
        padding: 1.5rem;
        border-radius: 0;
    }

    .article-detail-title {
        font-size: 1.75rem;
    }

    .article-detail-content {
        font-size: 1rem;
    }

    .article-share {
        flex-direction: column;
        align-items: flex-start;
    }

    .comment-replies {
        margin-left: 0.75rem;
        padding-left: 0.75rem;
    }
}

/* ===== Contact & Submit Pages ===== */
.contact-page,
.submit-page {
    padding-top: 2rem;
    padding-bottom: 4rem;
}

.contact-box,
.submit-box {
    background-color: var(--color-content-box);
    color: var(--color-content-text);
    border-radius: 0.75rem;
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
}

.contact-box h1,
.submit-box h1 {
    color: var(--color-content-text);
    margin-bottom: 0.5rem;
}

.contact-box .lead,
.submit-box .lead {
    color: #666666;
    margin-bottom: 2rem;
}

.contact-box .form-control,
.submit-box .form-control {
    background-color: #ffffff;
    color: var(--color-content-text);
    border-color: #cccccc;
}

.contact-box .form-control:focus,
.submit-box .form-control:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 0.2rem rgba(162, 82, 29, 0.15);
}

.contact-box .form-label,
.submit-box .form-label {
    color: var(--color-content-text);
    font-weight: 500;
}

.contact-box .alert-success,
.submit-box .alert-success {
    background-color: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

.contact-box .alert-danger,
.submit-box .alert-danger {
    background-color: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

@media (max-width: 767.98px) {
    .contact-box,
    .submit-box {
        padding: 1.5rem;
        border-radius: 0;
    }
}

/* ===== Side Panel ===== */
.side-panel {
    background-color: var(--color-surface);
    border-radius: 0.5rem;
    padding: 1.5rem;
}

.side-panel-section {
    margin-bottom: 2rem;
}

.side-panel-section:last-child {
    margin-bottom: 0;
}

.side-panel-title {
    color: var(--color-text);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-accent);
}

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

.side-panel-list li {
    margin-bottom: 0.5rem;
}

.side-panel-list li:last-child {
    margin-bottom: 0;
}

.side-panel-list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text);
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    border-radius: 0.25rem;
    transition: background-color var(--transition-base), color var(--transition-base);
}

.side-panel-list a:hover {
    background-color: var(--color-border);
    color: var(--color-accent);
}

.side-panel-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.side-panel-tags .badge {
    font-size: 0.85rem;
    padding: 0.4em 0.8em;
    transition: background-color var(--transition-base);
}

.side-panel-tags .badge:hover {
    background-color: var(--color-accent) !important;
}

.side-panel-articles {
    list-style: none;
    padding: 0;
    margin: 0;
}

.side-panel-articles li {
    margin-bottom: 1rem;
}

.side-panel-articles li:last-child {
    margin-bottom: 0;
}

.side-panel-article {
    display: flex;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--color-text);
    transition: color var(--transition-base);
}

.side-panel-article:hover {
    color: var(--color-accent);
}

.side-panel-article-img {
    width: 60px;
    height: 45px;
    object-fit: cover;
    border-radius: 0.25rem;
    flex-shrink: 0;
}

.side-panel-article-content {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.side-panel-article-title {
    font-size: 0.9rem;
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.side-panel-article-date {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}