/* Dark theme (default) */
:root,
[data-theme="dark"] {
    --bg-dark: #0F0F0F;
    --bg-darker: #080808;
    --text-light: #F5F5F5;
    --text-gray: #A0A0A0;
    --primary-color: #10B981;
    --primary-hover: #059669;
    --border-subtle: rgba(255, 255, 255, 0.1);
    --border-subtle-strong: rgba(255, 255, 255, 0.15);
    --hover-overlay: rgba(255, 255, 255, 0.1);
    --input-bg: rgba(255, 255, 255, 0.05);
    --input-border: rgba(255, 255, 255, 0.1);
    --input-focus-bg: rgba(255, 255, 255, 0.08);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --card-hover-border: rgba(59, 130, 246, 0.3);
    --code-bg: rgba(59, 130, 246, 0.1);
}

/* Light theme */
[data-theme="light"] {
    --bg-dark: #F8FAFC;
    --bg-darker: #FFFFFF;
    --text-light: #0F172A;
    --text-gray: #475569;
    --primary-color: #059669;
    --primary-hover: #047857;
    --border-subtle: rgba(0, 0, 0, 0.08);
    --border-subtle-strong: rgba(0, 0, 0, 0.12);
    --hover-overlay: rgba(0, 0, 0, 0.06);
    --input-bg: rgba(0, 0, 0, 0.04);
    --input-border: rgba(0, 0, 0, 0.12);
    --input-focus-bg: rgba(0, 0, 0, 0.06);
    --shadow-color: rgba(0, 0, 0, 0.12);
    --card-hover-border: rgba(5, 150, 105, 0.4);
    --code-bg: rgba(5, 150, 105, 0.12);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color 0.25s ease, color 0.2s ease;
    text-align: justify;
}

/* Navigation Bar */
.navbar {
    background-color: var(--bg-darker);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.875rem 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    text-align: left;
}

@media (min-width: 769px) {
    .navbar {
        padding: 1rem 2rem;
    }
}

.navbar-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 0.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.navbar-brand {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-light);
    text-decoration: none;
    display: flex;
    align-items: center;
    line-height: 1;
    height: 100%;
}

.navbar-brand .highlight {
    color: var(--primary-color);
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    list-style: none;
}

.navbar-menu a {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
    padding: 0.25rem 0;
}

.navbar-menu a:hover {
    color: var(--text-light);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-gray);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    font-size: 1.35rem;
    line-height: 1;
    transition: all 0.2s;
}

.navbar-toggle:hover {
    color: var(--text-light);
    background: var(--hover-overlay);
}

.navbar-toggle[aria-expanded="true"] .fa-bars { display: none; }
.navbar-toggle[aria-expanded="true"] .fa-times { display: inline-block; }
.navbar-toggle .fa-times { display: none; }

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-gray);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    transition: all 0.2s;
    font-size: 1.2rem;
}

.btn-icon:hover {
    background-color: var(--hover-overlay);
    color: var(--text-light);
}

.btn-subscribe {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.625rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
}

.btn-subscribe:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
    padding: 4rem 2.5rem;
    text-align: center;
}

.hero h1 {
    text-align: center;
}

.hero-container {
    max-width: 1000px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero h1 .highlight {
    color: var(--primary-color);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: 2.5rem;
    text-align: justify;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-tagline {
    font-size: 1.15rem;
}

.newsletter-form {
    display: flex;
    gap: 1rem;
    max-width: 560px;
    margin: 0 auto;
}

.newsletter-input {
    flex: 1;
    padding: 1rem 1.5rem;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 0.5rem;
    color: var(--text-light);
    font-size: 1rem;
    transition: all 0.2s;
}

.newsletter-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: var(--input-focus-bg);
}

.newsletter-input::placeholder {
    color: var(--text-gray);
}

/* Main Content Area */
.main-content {
    max-width: 1440px;
    margin: 0 auto;
    padding: 3rem 2.5rem;
}

.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.content-section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-light);
    text-align: left;
}

.content-section h2 .highlight {
    color: var(--primary-color);
}

/* Post Cards */
.post-card {
    background-color: var(--bg-darker);
    border: 1px solid var(--border-subtle);
    border-radius: 0.75rem;
    padding: 2rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s;
}

.post-card:hover {
    transform: translateY(-4px);
    border-color: var(--card-hover-border);
    box-shadow: 0 8px 24px var(--shadow-color);
}

.post-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-light);
    text-align: left;
}

.post-card h3 a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.2s;
}

.post-card h3 a:hover {
    color: var(--primary-color);
}

.post-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--text-gray);
    text-align: left;
}

.post-excerpt {
    color: var(--text-gray);
    line-height: 1.7;
    text-align: justify;
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sidebar-section {
    background-color: var(--bg-darker);
    border: 1px solid var(--border-subtle);
    border-radius: 0.75rem;
    padding: 1.5rem;
}

.sidebar-section h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-light);
    text-align: left;
}

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

.sidebar-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-subtle);
    text-align: left;
}

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

.sidebar-list a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color 0.2s;
}

.sidebar-list a:hover {
    color: var(--primary-color);
}

/* Footer */
.footer {
    background-color: var(--bg-darker);
    border-top: 1px solid var(--border-subtle);
    padding: 3rem 2rem 2rem;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1440px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-light);
    text-align: left;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
    text-align: left;
}

.footer-links a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color 0.2s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-gray);
    font-size: 0.875rem;
}

/* Post Content Styling */
.post-content {
    color: var(--text-gray);
    line-height: 1.8;
    text-align: justify;
}

.post-content p {
    text-align: justify;
}

.post-content li {
    text-align: justify;
}

.post-content h1, .post-content h2, .post-content h3 {
    color: var(--text-light);
    margin-top: 2rem;
    margin-bottom: 1rem;
    text-align: left;
}

.post-content h1 {
    font-size: 2.5rem;
    font-weight: 800;
}

.post-content h2 {
    font-size: 2rem;
    font-weight: 700;
}

.post-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

.post-content code {
    background-color: var(--code-bg);
    color: var(--primary-color);
    padding: 0.2rem 0.5rem;
    border-radius: 0.375rem;
    font-size: 0.875em;
    font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
}

.post-content pre {
    background-color: var(--bg-darker);
    border: 1px solid var(--border-subtle);
    color: var(--text-light);
    padding: 1.25rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin: 1.5rem 0;
}

.post-content pre code {
    background-color: transparent;
    color: var(--text-light);
    padding: 0;
}

.post-content a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid var(--card-hover-border);
    transition: all 0.2s;
}

.post-content a:hover {
    color: var(--primary-hover);
    border-bottom-color: var(--primary-color);
}

.post-content img {
    max-width: 100%;
    height: auto;
}

.post-content table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.post-content {
    overflow-wrap: break-word;
    word-wrap: break-word;
}

/* Heading Anchor Links */
.heading-link {
    color: inherit;
    text-decoration: none;
    border-bottom: none;
}

.heading-link:hover {
    color: var(--primary-color);
}

.post-content h2:hover .heading-link::before,
.post-content h3:hover .heading-link::before {
    content: " #";
    color: var(--primary-color);
    font-size: 0.8em;
    opacity: 0.6;
}

/* Disqus Comments Section */
.comments-section {
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.comments-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.comments-title .highlight {
    color: var(--primary-color);
}

#disqus_thread {
    background-color: var(--bg-darker);
    border: 1px solid var(--border-subtle);
    border-radius: 0.75rem;
    padding: 2rem;
    margin-top: 1rem;
}

#disqus_thread iframe {
    background-color: transparent;
}

/* Cookie consent banner (GDPR) */
#cookie-consent-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-darker);
    border-top: 1px solid var(--border-subtle-strong);
    padding: 1.25rem 2rem;
    z-index: 9999;
    box-shadow: 0 -4px 20px var(--shadow-color);
    display: none;
}

#cookie-consent-banner.show {
    display: block;
}

.cookie-consent-inner {
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    justify-content: space-between;
}

.cookie-consent-text {
    flex: 1;
    min-width: 280px;
    color: var(--text-gray);
    font-size: 0.9375rem;
    line-height: 1.5;
    text-align: justify;
}

.cookie-consent-text a {
    color: var(--primary-color);
    text-decoration: underline;
}

.cookie-consent-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn-cookie {
    background: transparent;
    border: 1px solid var(--border-subtle-strong);
    color: var(--text-light);
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
    font-size: 0.875rem;
}

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

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

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

/* Adsterra Ad Styles */
.ad-container {
    background-color: var(--bg-darker);
    border: 1px solid var(--border-subtle);
    border-radius: 0.75rem;
    padding: 1rem;
    margin: 1.5rem 0;
    text-align: center;
    overflow: hidden;
}

.ad-container.sidebar {
    margin-bottom: 2rem;
}

.ad-container.horizontal {
    max-width: 100%;
    margin: 2rem auto;
}

.ad-container.vertical {
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
}

.ad-label {
    font-size: 0.75rem;
    color: var(--text-gray);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
    opacity: 0.6;
}

/* Pagination */
.pagination {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.pagination-list {
    display: flex;
    gap: 0.5rem;
    list-style: none;
}

.pagination-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    background-color: var(--bg-darker);
    border: 1px solid var(--border-subtle);
    border-radius: 0.5rem;
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.2s;
}

.pagination-link:hover {
    background-color: var(--hover-overlay);
    border-color: var(--primary-color);
}

.pagination-link.is-current {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Responsive */
@media (max-width: 968px) {
    .navbar {
        padding: 0.875rem 1.25rem;
    }

    .content-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .main-content {
        padding: 2rem 1.25rem;
    }

    .newsletter-form {
        flex-direction: column;
        width: 100%;
    }

    .newsletter-form .newsletter-input,
    .newsletter-form .btn-subscribe {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 0.75rem 1rem;
    }

    .navbar-container {
        gap: 0.75rem;
    }

    .navbar-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 44px;
        min-height: 44px;
    }

    .navbar-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-darker);
        border-bottom: 1px solid var(--border-subtle);
        flex-direction: column;
        padding: 1rem;
        gap: 0;
        box-shadow: 0 8px 24px var(--shadow-color);
    }

    .navbar-menu.is-open {
        display: flex;
    }

    .navbar-menu li {
        width: 100%;
        border-bottom: 1px solid var(--border-subtle);
    }

    .navbar-menu li:last-child {
        border-bottom: none;
    }

    .navbar-menu a {
        display: block;
        padding: 0.875rem 0;
        font-size: 1rem;
    }

    .hero {
        padding: 2.5rem 1rem;
    }

    .hero h1 {
        font-size: 2rem;
        line-height: 1.2;
    }

    .hero p {
        font-size: 1rem;
        margin-bottom: 1.5rem;
        text-align: justify;
    }

    .main-content {
        padding: 1.5rem 1rem;
    }

    .content-section h2 {
        font-size: 1.5rem;
    }

    .post-card {
        padding: 1.25rem;
    }

    .post-card h3 {
        font-size: 1.25rem;
    }

    .post-content h1 {
        font-size: 1.75rem;
    }

    .post-content h2 {
        font-size: 1.5rem;
    }

    .post-content h3 {
        font-size: 1.25rem;
    }

    .post-content pre,
    .post-content table {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .post-content pre {
        padding: 1rem;
        font-size: 0.875rem;
    }

    .cookie-consent-inner {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .cookie-consent-text {
        min-width: 0;
        font-size: 0.875rem;
    }

    .cookie-consent-actions {
        flex-direction: column;
    }

    .cookie-consent-actions button {
        width: 100%;
        padding: 0.75rem 1rem;
    }

    .footer {
        padding: 2rem 1rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        text-align: center;
    }

    .btn-subscribe {
        min-height: 44px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.65rem;
    }

    .navbar-brand {
        font-size: 1.2rem;
    }

    .navbar-actions .btn-subscribe {
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
    }
}

/* Table of Contents styling */
.post-content ul, .post-content ol {
    margin: 1rem 0 1rem 2rem;
}

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

/* TOC in article */
.post-card nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.post-card nav li {
    padding: 0.5rem 0;
}

.post-card nav li a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color 0.2s;
}

.post-card nav li a:hover {
    color: var(--primary-color);
}

.post-card nav ul ul {
    padding-left: 1.5rem;
}