/* ============================================
   Red Hat Inspired Design System
   ============================================ */

:root {
    /* Red Hat Color Palette */
    --rh-red: #CC0000;
    --rh-red-dark: #820000;
    --rh-red-light: #E31E24;
    --rh-black: #151515;
    --rh-gray-900: #1E1E1E;
    --rh-gray-800: #2B2B2B;
    --rh-gray-700: #3D3D3D;
    --rh-gray-600: #6A6A6A;
    --rh-gray-500: #8A8A8A;
    --rh-gray-400: #B8B8B8;
    --rh-gray-300: #D2D2D2;
    --rh-gray-200: #E8E8E8;
    --rh-gray-100: #F5F5F5;
    --rh-white: #FFFFFF;
    
    /* Typography */
    --font-display: 'Red Hat Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-text: 'Red Hat Text', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-text);
    font-size: 16px;
    line-height: 1.6;
    color: var(--rh-gray-900);
    background-color: var(--rh-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

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

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

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

/* ============================================
   Container
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

/* ============================================
   Header
   ============================================ */

.site-header {
    background-color: var(--rh-white);
    border-bottom: 1px solid var(--rh-gray-200);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-logo {
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

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

.site-tagline {
    font-size: 0.875rem;
    color: var(--rh-gray-600);
    margin: 0.25rem 0 0 0;
    font-weight: 400;
    line-height: 1.4;
    max-width: 500px;
}

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

.site-nav a {
    color: var(--rh-gray-700);
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    position: relative;
}

.site-nav a:hover,
.site-nav a.active {
    color: var(--rh-red);
}

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

/* ============================================
   Main Content
   ============================================ */

.main-content {
    min-height: calc(100vh - 200px);
}

/* ============================================
   Hero Section
   ============================================ */

.hero-section {
    background: linear-gradient(135deg, var(--rh-gray-100) 0%, var(--rh-white) 100%);
    padding: var(--spacing-2xl) 0;
    margin-bottom: var(--spacing-2xl);
    scroll-margin-top: 80px;
}

.hero-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
}

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

.avatar-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--rh-white);
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
}

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

@media (min-width: 768px) {
    .hero-content {
        flex-direction: row;
        text-align: left;
        align-items: center;
    }
    
    .hero-avatar {
        margin-bottom: 0;
        margin-right: var(--spacing-xl);
        flex-shrink: 0;
    }
    
    .avatar-image {
        width: 250px;
        height: 250px;
    }
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--rh-gray-900);
    margin-bottom: var(--spacing-md);
}

.highlight {
    color: var(--rh-red);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--rh-gray-600);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--rh-gray-700);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    text-align: center;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--rh-red);
    color: var(--rh-white);
    border: 2px solid var(--rh-red);
}

.btn-primary:hover {
    background-color: var(--rh-red-dark);
    border-color: var(--rh-red-dark);
    color: var(--rh-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--rh-red);
    border: 2px solid var(--rh-red);
}

.btn-secondary:hover {
    background-color: var(--rh-red);
    color: var(--rh-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ============================================
   Sections
   ============================================ */

section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    color: var(--rh-gray-900);
    margin-bottom: var(--spacing-md);
}

.section-description {
    text-align: center;
    color: var(--rh-gray-600);
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

/* ============================================
   Tech Stack
   ============================================ */

.tech-stack {
    background-color: var(--rh-gray-100);
}

.tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.tech-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--rh-white);
    color: var(--rh-gray-700);
    border: 1px solid var(--rh-gray-300);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.tech-badge:hover {
    border-color: var(--rh-red);
    color: var(--rh-red);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* ============================================
   Articles Grid
   ============================================ */

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

.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

@media (min-width: 768px) {
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .articles-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.article-card {
    background-color: var(--rh-white);
    border: 1px solid var(--rh-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.article-card:hover {
    border-color: var(--rh-red);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.article-icon {
    color: var(--rh-red);
    margin-bottom: var(--spacing-md);
}

.article-title {
    font-size: 1.5rem;
    color: var(--rh-gray-900);
    margin-bottom: var(--spacing-sm);
}

.article-description {
    color: var(--rh-gray-600);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.tag {
    display: inline-block;
    padding: 0.25rem var(--spacing-sm);
    background-color: var(--rh-gray-100);
    color: var(--rh-gray-700);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.article-link {
    color: var(--rh-red);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: auto;
}

.article-link:hover {
    color: var(--rh-red-dark);
    gap: var(--spacing-sm);
}

/* ============================================
   Achievements
   ============================================ */

.achievements-section {
    background-color: var(--rh-gray-100);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.achievement-card {
    background-color: var(--rh-white);
    border: 1px solid var(--rh-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all 0.3s ease;
    text-decoration: none;
    display: block;
}

.achievement-card:hover {
    border-color: var(--rh-red);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.achievement-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.achievement-card h3 {
    color: var(--rh-gray-900);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.achievement-card p {
    color: var(--rh-gray-600);
    font-size: 0.875rem;
}

/* ============================================
   Artifact Hub
   ============================================ */

.artifact-hub-section {
    background-color: var(--rh-white);
    border-top: 1px solid var(--rh-gray-200);
    scroll-margin-top: 80px;
}

.artifact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

@media (min-width: 768px) {
    .artifact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .artifact-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.artifact-card {
    background-color: var(--rh-white);
    border: 1px solid var(--rh-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all 0.3s ease;
    text-decoration: none;
    display: block;
    text-align: center;
}

.artifact-card:hover {
    border-color: var(--rh-red);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.artifact-icon {
    color: var(--rh-red);
    margin-bottom: var(--spacing-md);
    display: flex;
    justify-content: center;
}

.artifact-title {
    font-size: 1.25rem;
    color: var(--rh-gray-900);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.artifact-badge {
    margin: var(--spacing-md) 0;
    display: flex;
    justify-content: center;
}

.artifact-badge img {
    height: 20px;
    width: auto;
}

.artifact-description {
    color: var(--rh-gray-600);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-top: var(--spacing-sm);
}

/* ============================================
   Collaborations
   ============================================ */

.videos-section {
    padding: var(--spacing-2xl) 0;
    background-color: var(--rh-white);
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.video-item {
    width: 100%;
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    background-color: var(--rh-gray-900);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

@media (max-width: 768px) {
    .videos-grid {
        grid-template-columns: 1fr;
    }
}

.linkedin-posts-section {
    padding: var(--spacing-2xl) 0;
    background-color: var(--rh-gray-100);
}

.linkedin-posts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

@media (min-width: 768px) {
    .linkedin-posts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .linkedin-posts-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.linkedin-post-card {
    background-color: var(--rh-white);
    border: 1px solid var(--rh-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all 0.3s ease;
    text-decoration: none;
    display: block;
    color: var(--rh-gray-900);
}

.linkedin-post-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--rh-red);
}

.linkedin-post-icon {
    color: #0077B5;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
}

.linkedin-post-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--rh-gray-900);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-display);
}

.linkedin-post-description {
    color: var(--rh-gray-600);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.linkedin-post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.linkedin-post-tags .tag {
    background-color: var(--rh-gray-100);
    color: var(--rh-gray-700);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 500;
}

.collaborations-section {
    background-color: var(--rh-gray-100);
}

.collaborations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-xl);
    align-items: center;
    margin-top: var(--spacing-xl);
}

.collaboration-logo {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-lg);
    background-color: var(--rh-gray-100);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    filter: grayscale(100%);
    opacity: 0.7;
}

.collaboration-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.collaboration-logo img {
    max-height: 60px;
    width: auto;
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
    background-color: var(--rh-gray-900);
    color: var(--rh-gray-300);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

.footer-section h3 {
    color: var(--rh-white);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: var(--rh-gray-300);
    transition: color 0.2s ease;
}

.footer-section a:hover {
    color: var(--rh-white);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    color: var(--rh-gray-400);
    transition: color 0.2s ease;
}

.social-links a:hover {
    color: var(--rh-red);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--rh-gray-700);
    color: var(--rh-gray-500);
    font-size: 0.875rem;
}

/* ============================================
   Page Styles
   ============================================ */

.page-title {
    font-size: 2.5rem;
    text-align: center;
    color: var(--rh-gray-900);
    margin-bottom: var(--spacing-md);
}

.page-description {
    text-align: center;
    color: var(--rh-gray-600);
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 2px solid var(--rh-gray-200);
}

.about-avatar {
    flex-shrink: 0;
}

.about-avatar-image {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--rh-red);
    box-shadow: var(--shadow-lg);
}

.about-intro {
    text-align: center;
}

@media (min-width: 768px) {
    .about-header {
        flex-direction: row;
        align-items: flex-start;
        text-align: left;
    }
    
    .about-intro {
        text-align: left;
        flex: 1;
    }
    
    .about-avatar-image {
        width: 200px;
        height: 200px;
    }
}

.about-section {
    margin-bottom: var(--spacing-2xl);
}

.about-section h2 {
    font-size: 2rem;
    color: var(--rh-gray-900);
    margin-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--rh-red);
    padding-bottom: var(--spacing-sm);
}

.about-company {
    font-size: 1.25rem;
    color: var(--rh-red);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.about-description {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--rh-gray-700);
}

.tech-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.tech-category h3 {
    font-size: 1.25rem;
    color: var(--rh-gray-900);
    margin-bottom: var(--spacing-sm);
}

.tech-category ul {
    list-style: none;
    padding: 0;
}

.tech-category ul li {
    padding: var(--spacing-xs) 0;
    color: var(--rh-gray-700);
    position: relative;
    padding-left: var(--spacing-md);
}

.tech-category ul li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--rh-red);
}

.social-links-large {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--rh-gray-100);
    color: var(--rh-gray-700);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    text-decoration: none;
    font-weight: 500;
}

.social-link:hover {
    background-color: var(--rh-red);
    color: var(--rh-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ============================================
   Section Subtitles
   ============================================ */

.section-subtitle {
    font-size: 2rem;
    color: var(--rh-gray-900);
    text-align: center;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   LinkedIn Articles
   ============================================ */

.linkedin-article {
    border-left: 4px solid #0077B5;
}

.linkedin-article .article-link {
    color: #0077B5;
}

.linkedin-article .article-link:hover {
    color: #005885;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 767px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .site-nav ul {
        gap: var(--spacing-md);
        font-size: 0.875rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .tech-list {
        grid-template-columns: 1fr;
    }
}