/* CSS Reset & Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-secondary: #64748b;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-background: #ffffff;
    --color-surface: #f8fafc;
    --color-border: #e2e8f0;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --max-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

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

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

/* Header & Navigation */
.site-header {
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-links a {
    color: var(--color-text-light);
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-primary);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-background) 100%);
    text-align: center;
}

.hero h1 {
    margin-bottom: var(--spacing-md);
}

.hero-text {
    font-size: 1.25rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
}

/* Page Header */
.page-header {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-surface);
    text-align: center;
}

.page-header p {
    color: var(--color-text-light);
    font-size: 1.125rem;
    margin-top: var(--spacing-sm);
}

/* Featured Posts / Blog List */
.featured-posts,
.blog-list {
    padding: var(--spacing-2xl) 0;
}

.featured-posts h2 {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.post-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

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

.post-card-content {
    padding: var(--spacing-md);
}

.post-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.post-card h3 {
    margin-bottom: var(--spacing-sm);
}

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

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

.post-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.post-card time {
    display: block;
    font-size: 0.85rem;
    color: var(--color-secondary);
    margin-top: var(--spacing-sm);
}

/* Newsletter Section */
.newsletter {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-surface);
    text-align: center;
}

.newsletter h2 {
    margin-bottom: var(--spacing-sm);
}

.newsletter > .container > p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form input {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    outline: none;
    transition: border-color 0.2s ease;
}

.newsletter-form input:focus {
    border-color: var(--color-primary);
}

/* About Content */
.about-content {
    padding: var(--spacing-2xl) 0;
}

.about-section {
    margin-bottom: var(--spacing-xl);
}

.about-section h2 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.about-section p {
    color: var(--color-text-light);
    max-width: 700px;
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--color-text-light);
}

.feature-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

/* Footer */
.site-footer {
    background-color: var(--color-text);
    color: var(--color-surface);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
    color: var(--color-surface);
    display: block;
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: var(--color-secondary);
}

.footer-links h4 {
    color: var(--color-surface);
    margin-bottom: var(--spacing-sm);
}

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

.footer-links a {
    color: var(--color-secondary);
    display: block;
    padding: var(--spacing-xs) 0;
}

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

.footer-bottom {
    border-top: 1px solid var(--color-secondary);
    padding-top: var(--spacing-md);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-secondary);
    font-size: 0.875rem;
    margin: 0;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-background);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: 0;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: var(--spacing-sm);
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links li:last-child a {
        border-bottom: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: var(--spacing-xl) 0;
    }

    .newsletter-form {
        flex-direction: column;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .posts-grid {
        grid-template-columns: 1fr;
    }
}

/* Video Blog Styles */
.featured-video {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-surface);
}

.featured-video h2 {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.video-featured-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

a.video-featured-wrapper:hover {
    color: inherit;
}

.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    background-color: var(--color-text);
    border-radius: var(--radius);
    overflow: hidden;
}

.video-container iframe,
.video-container video,
.video-container img.featured-thumbnail-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    background-color: #000;
}

/* Play button overlay for featured video */
.play-button-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    z-index: 5;
    transition: background 0.2s ease;
}

.video-featured-wrapper:hover .play-button-overlay {
    background: rgba(0, 0, 0, 0.4);
}

.play-button-large {
    width: 80px;
    height: 80px;
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    position: relative;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.video-featured-wrapper:hover .play-button-large {
    transform: scale(1.1);
    background-color: white;
}

.play-button-large::after {
    content: '';
    position: absolute;
    left: 55%;
    top: 50%;
    transform: translate(-50%, -50%);
    border-style: solid;
    border-width: 15px 0 15px 25px;
    border-color: transparent transparent transparent var(--color-primary);
}

.video-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    color: var(--color-surface);
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.play-button {
    width: 80px;
    height: 80px;
    background-color: var(--color-primary);
    border-radius: 50%;
    position: relative;
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.play-button:hover {
    transform: scale(1.1);
    background-color: var(--color-primary-dark);
}

.play-button::after {
    content: '';
    position: absolute;
    left: 55%;
    top: 50%;
    transform: translate(-50%, -50%);
    border-style: solid;
    border-width: 15px 0 15px 25px;
    border-color: transparent transparent transparent white;
}

.video-info {
    padding: var(--spacing-md);
}

.video-info h3 {
    margin: var(--spacing-sm) 0;
}

.video-info p {
    color: var(--color-text-light);
}

.video-info time {
    display: block;
    font-size: 0.85rem;
    color: var(--color-secondary);
    margin-top: var(--spacing-sm);
}

.video-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-primary);
}

/* Video Card Styles */
.video-card {
    overflow: hidden;
}

.video-thumbnail {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.video-placeholder-small {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e293b 0%, #475569 100%);
    cursor: pointer;
}

.play-button-small {
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: transform 0.2s ease, background-color 0.2s ease;
    z-index: 2;
}

.video-card:hover .play-button-small {
    transform: translate(-50%, -50%) scale(1.1);
    background-color: white;
}

.play-button-small::after {
    content: '';
    position: absolute;
    left: 55%;
    top: 50%;
    transform: translate(-50%, -50%);
    border-style: solid;
    border-width: 10px 0 10px 16px;
    border-color: transparent transparent transparent var(--color-text);
}

.video-duration {
    position: absolute;
    bottom: var(--spacing-xs);
    right: var(--spacing-xs);
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    z-index: 2;
}

/* Video Page Styles */
.video-page {
    padding: var(--spacing-lg) 0;
}

.video-header {
    margin-bottom: var(--spacing-md);
}

.video-header h1 {
    margin: var(--spacing-xs) 0;
    font-size: 2rem;
}

.video-header time {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.video-description {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-bg-secondary);
    border-radius: var(--border-radius);
}

.video-description h2 {
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
}

.video-description p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

/* Video thumbnail image */
.video-thumbnail img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-thumbnail-wrapper {
    position: relative;
    cursor: pointer;
}

.video-thumbnail-wrapper .play-button-small {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
}

/* Loading message */
.loading-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-light);
}

/* Inline Video Player (Two-Click System) */
.inline-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #000;
}

.inline-video video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.click-to-redirect-hint {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    padding: var(--spacing-sm);
    font-size: 0.8rem;
    text-align: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.video-thumbnail-wrapper:hover .click-to-redirect-hint,
.inline-video:hover .click-to-redirect-hint {
    opacity: 1;
}

/* Make video-thumbnail-wrapper properly positioned for inline video */
.video-thumbnail-wrapper {
    position: relative;
    cursor: pointer;
    display: block;
}

.video-thumbnail-wrapper .video-thumbnail {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

/* Responsive Video Styles */
@media (max-width: 768px) {
    .video-featured-wrapper {
        grid-template-columns: 1fr;
    }

    .video-info {
        padding: var(--spacing-sm) 0;
    }

    .video-header h1 {
        font-size: 1.5rem;
    }

    .video-description {
        padding: var(--spacing-sm);
    }

    .click-to-redirect-hint {
        font-size: 0.7rem;
        padding: var(--spacing-xs);
    }
}

/* Social Media Share Buttons */
.share-buttons {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.share-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-light);
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    color: white;
    transition: transform 0.2s ease, opacity 0.2s ease;
    text-decoration: none;
}

.share-btn:hover {
    transform: scale(1.1);
    opacity: 0.9;
    color: white;
}

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

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

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

.share-whatsapp {
    background-color: #25d366;
}

.share-telegram {
    background-color: #0088cc;
}

.share-reddit {
    background-color: #ff4500;
}

.share-copy {
    background-color: var(--color-secondary);
}

.share-btn svg {
    width: 18px;
    height: 18px;
}

@media (max-width: 768px) {
    .share-buttons {
        gap: var(--spacing-xs);
    }

    .share-btn {
        width: 32px;
        height: 32px;
    }

    .share-btn svg {
        width: 16px;
        height: 16px;
    }
}