/* ===================================
   CSS Custom Properties (Variables)
   =================================== */
:root {
    /* Color Palette - Dark theme with teal accent */
    --color-bg: #0a192f;
    --color-bg-alt: #112240;
    --color-bg-card: #172a45;
    --color-text: #ccd6f6;
    --color-text-secondary: #8892b0;
    --color-accent: #64ffda;
    --color-accent-dark: #4ecfb3;
    --color-heading: #e6f1ff;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', 'Courier New', monospace;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Borders */
    --border-radius: 4px;
    --border-radius-lg: 8px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* ===================================
   Global Resets & Base Styles
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-heading);
    line-height: 1.2;
    font-weight: 600;
}

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

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

/* Focus styles for accessibility */
*:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

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

/* ===================================
   Navigation
   =================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(10, 25, 47, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: transform var(--transition-base);
}

.nav.hidden {
    transform: translateY(-100%);
}

.nav__container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav__logo {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    transition: transform var(--transition-fast);
}

.nav__logo:hover {
    transform: scale(1.05);
}

.nav__menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav__item {
    position: relative;
}

.nav__link {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-text);
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.nav__link:hover,
.nav__link.active {
    color: var(--color-accent);
}

.nav__number {
    color: var(--color-accent);
    font-size: 0.85rem;
}

/* Mobile hamburger menu */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav__toggle-line {
    width: 25px;
    height: 2px;
    background-color: var(--color-accent);
    transition: all var(--transition-fast);
}

/* ===================================
   Social Icons (Global)
   =================================== */
.social-icon {
    width: 20px;
    height: 20px;
    transition: all var(--transition-base);
}

.social-icon--large {
    width: 24px;
    height: 24px;
}

/* ===================================
   Fixed Social Sidebar
   =================================== */
.social-sidebar {
    position: fixed;
    left: var(--spacing-md);
    bottom: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.social-sidebar__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

.social-sidebar__link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
    position: relative;
}

.social-sidebar__link:hover {
    color: var(--color-accent);
    transform: translateY(-3px);
}

.social-sidebar__link:hover .social-icon {
    filter: drop-shadow(0 0 8px var(--color-accent));
}

/* Vertical line below icons */
.social-sidebar__line {
    width: 1px;
    height: 90px;
    background-color: var(--color-text-secondary);
    opacity: 0.5;
}

/* Hide on mobile and tablet */
@media (max-width: 1024px) {
    .social-sidebar {
        display: none;
    }
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-xl) 0;
}

.hero__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero__greeting {
    font-family: var(--font-mono);
    color: var(--color-accent);
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.hero__name {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    margin-bottom: var(--spacing-xs);
    color: var(--color-heading);
}

.hero__tagline {
    font-size: clamp(1.5rem, 5vw, 3rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.hero__description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 540px;
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.hero__cta-group {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
    flex-wrap: wrap;
}

.hero__cta {
    display: inline-block;
    padding: 1rem 2rem;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    border-radius: var(--border-radius);
    transition: all var(--transition-base);
    text-align: center;
    min-width: 180px;
}

.hero__cta--primary {
    background-color: var(--color-accent);
    color: var(--color-bg);
    border: 2px solid var(--color-accent);
    font-weight: 600;
}

.hero__cta--primary:hover {
    background-color: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(100, 255, 218, 0.3);
    color: var(--color-bg);
}

.hero__cta--secondary {
    background-color: transparent;
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
}

.hero__cta--secondary:hover {
    background-color: rgba(100, 255, 218, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(100, 255, 218, 0.2);
}

/* Hero Social Links */
.hero__social {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(100, 255, 218, 0.1);
}

.hero__social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
    border-radius: var(--border-radius);
}

.hero__social-link:hover {
    color: var(--color-accent);
    background-color: rgba(100, 255, 218, 0.1);
    transform: translateY(-3px);
}

.hero__social-link:hover .social-icon {
    filter: drop-shadow(0 0 8px var(--color-accent));
}

/* Hero Visual - Split Card */
.hero__visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.split-card {
    position: relative;
    width: 100%;
    max-width: 400px;
    height: 400px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    perspective: 1000px;
}

.split-card__side {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    background-color: var(--color-bg-card);
    border: 1px solid rgba(100, 255, 218, 0.2);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    transition: all var(--transition-base);
    cursor: default;
}

.split-card__side:hover {
    transform: translateY(-10px) rotateY(5deg);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg);
}

.split-card__side--design:hover {
    transform: translateY(-10px) rotateY(-5deg);
}

.split-card__icon {
    width: 80px;
    height: 80px;
    color: var(--color-accent);
}

.split-card__label {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    color: var(--color-text);
    font-weight: 600;
}

/* ===================================
   Animations
   =================================== */
.fade-in {
    animation: fadeInUp 0.8s ease both;
}

.hero__content {
    animation-delay: 0.1s;
}

.hero__visual {
    animation-delay: 0.3s;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Reveal on scroll animation */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.reveal-on-scroll.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   Section Headings
   =================================== */
.section-heading {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

.section-heading__number {
    font-family: var(--font-mono);
    color: var(--color-accent);
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 400;
}

.section-heading::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: rgba(100, 255, 218, 0.2);
    margin-left: var(--spacing-md);
    max-width: 300px;
}

/* ===================================
   About Section
   =================================== */
.about {
    padding: var(--spacing-xl) 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.about__content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
}

.about__text p {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.about__details {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.detail-card {
    background-color: var(--color-bg-card);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(100, 255, 218, 0.1);
    transition: all var(--transition-base);
}

.detail-card:hover {
    border-color: var(--color-accent);
    transform: translateX(5px);
}

.detail-card__heading {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-card__text {
    color: var(--color-text);
    font-size: 1rem;
}

/* ===================================
   Projects Section
   =================================== */
.projects {
    padding: var(--spacing-xl) 0;
}

.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: var(--spacing-lg);
}

/* Project Cards */
.project-card {
    position: relative;
    background-color: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(100, 255, 218, 0.1);
    overflow: hidden;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: 0 20px 50px rgba(100, 255, 218, 0.2);
}

/* Featured Project Cards */
.project-card--featured {
    grid-column: span 1;
}

@media (min-width: 768px) {
    .project-card--featured {
        grid-column: span 2;
    }
    
    .projects__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Project Badges */
.project-card__badges {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    display: flex;
    gap: var(--spacing-xs);
    z-index: 2;
}

.project-badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.4rem 0.8rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    backdrop-filter: blur(10px);
}

.project-badge--featured {
    background-color: rgba(100, 255, 218, 0.95);
    color: var(--color-bg);
}

.project-badge--status {
    background-color: rgba(10, 25, 47, 0.9);
    border: 1px solid rgba(100, 255, 218, 0.3);
    color: var(--color-text);
}

.project-badge--active {
    border-color: #4ade80;
    color: #4ade80;
}

.project-badge--maintained {
    border-color: #60a5fa;
    color: #60a5fa;
}

/* Project Thumbnail */
.project-card__thumbnail {
    position: relative;
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.project-card__thumbnail-placeholder {
    color: rgba(100, 255, 218, 0.3);
    transition: all var(--transition-base);
}

.project-card__thumbnail-placeholder svg {
    width: 80px;
    height: 80px;
}

.project-card:hover .project-card__thumbnail-placeholder {
    transform: scale(1.1);
    color: rgba(100, 255, 218, 0.5);
}

/* Thumbnail Overlay */
.project-card__thumbnail-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(10, 25, 47, 0.8) 100%);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: var(--spacing-md);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.project-card:hover .project-card__thumbnail-overlay {
    opacity: 1;
}

.project-card__view-hint {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-accent);
    font-weight: 600;
    transform: translateY(10px);
    transition: transform var(--transition-base);
}

.project-card:hover .project-card__view-hint {
    transform: translateY(0);
}

/* Project Content */
.project-card__content {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    flex-grow: 1;
}

/* Project Header */
.project-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.project-card__language {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.language-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.language-dot--javascript {
    background-color: #f7df1e;
}

.language-dot--typescript {
    background-color: #3178c6;
}

.language-dot--python {
    background-color: #3776ab;
}

.language-dot--react {
    background-color: #61dafb;
}

.language-name {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.project-card__updated {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

/* Project Title and Description */
.project-card__title {
    font-size: 1.5rem;
    color: var(--color-heading);
    margin: 0;
    line-height: 1.3;
}

.project-card__description {
    color: var(--color-text-secondary);
    line-height: 1.7;
    flex-grow: 1;
}

/* Tech Stack */
.project-card__tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    list-style: none;
    margin: var(--spacing-sm) 0;
}

.tech-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.35rem 0.75rem;
    background-color: rgba(100, 255, 218, 0.1);
    color: var(--color-accent);
    border-radius: var(--border-radius);
    border: 1px solid rgba(100, 255, 218, 0.2);
    transition: all var(--transition-fast);
}

.tech-badge:hover {
    background-color: rgba(100, 255, 218, 0.2);
    transform: translateY(-2px);
}

/* Project Footer */
.project-card__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(100, 255, 218, 0.1);
    margin-top: auto;
}

/* Project Stats (GitHub stars, forks) */
.project-stats {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.project-stat {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.project-stat svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

/* Project Links */
.project-card__links {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.project-card__link {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.project-card__link svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.project-card__link:hover {
    color: var(--color-accent);
    transform: translateX(3px);
}

.project-card__link--primary {
    color: var(--color-accent);
    font-weight: 600;
}

.project-card__link--primary:hover {
    color: var(--color-accent-dark);
}

/* Responsive Adjustments */
@media (max-width: 767px) {
    .projects__grid {
        grid-template-columns: 1fr;
    }
    
    .project-card__header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .project-card__footer {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
}


/* ===================================
   Articles Section
   =================================== */
.articles {
    padding: var(--spacing-xl) 0;
}

.articles__list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

/* Article Cards */
.article-card {
    background-color: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(100, 255, 218, 0.1);
    overflow: hidden;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    position: relative;
}

.article-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: 0 10px 40px rgba(100, 255, 218, 0.15);
}

/* Featured Article */
.article-card--featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-bg-card) 0%, rgba(100, 255, 218, 0.05) 100%);
    border: 2px solid var(--color-accent);
    margin-bottom: var(--spacing-lg);
}

.article-card--featured .article-card__thumbnail {
    height: 100%;
    min-height: 300px;
}

.article-card--featured .article-card__title {
    font-size: 2rem;
}

.article-card--featured .article-card__summary {
    font-size: 1.15rem;
}

.article-card__badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background-color: var(--color-accent);
    color: var(--color-bg);
    padding: 0.4rem 1rem;
    border-radius: var(--border-radius);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 10;
}

/* Article Thumbnail */
.article-card__thumbnail {
    width: 100%;
    height: 200px;
    background-color: rgba(100, 255, 218, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.article-card__thumbnail-placeholder {
    width: 80px;
    height: 80px;
    color: var(--color-accent);
    opacity: 0.3;
    transition: all var(--transition-base);
}

.article-card__thumbnail-placeholder svg {
    width: 100%;
    height: 100%;
}

.article-card:hover .article-card__thumbnail-placeholder {
    opacity: 0.6;
    transform: scale(1.1) rotate(5deg);
}

/* Article Content */
.article-card__content {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    flex-grow: 1;
}

.article-card__meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.article-card__date {
    color: var(--color-accent);
}

.article-card__separator {
    opacity: 0.5;
}

.article-card__reading-time {
    opacity: 0.8;
}

/* Category Tags */
.article-card__categories {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.article-category {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid;
}

.article-category--javascript {
    background-color: rgba(247, 223, 30, 0.1);
    color: #f7df1e;
    border-color: rgba(247, 223, 30, 0.3);
}

.article-category--react {
    background-color: rgba(97, 218, 251, 0.1);
    color: #61dafb;
    border-color: rgba(97, 218, 251, 0.3);
}

.article-category--css {
    background-color: rgba(38, 77, 228, 0.2);
    color: #68a5f8;
    border-color: rgba(38, 77, 228, 0.4);
}

.article-category--career {
    background-color: rgba(255, 121, 198, 0.1);
    color: #ff79c6;
    border-color: rgba(255, 121, 198, 0.3);
}

.article-category--tutorials {
    background-color: rgba(189, 147, 249, 0.1);
    color: #bd93f9;
    border-color: rgba(189, 147, 249, 0.3);
}

.article-card__title {
    font-size: 1.5rem;
    margin: var(--spacing-xs) 0;
    line-height: 1.3;
}

.article-card__link {
    color: var(--color-heading);
    transition: color var(--transition-fast);
}

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

.article-card__summary {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    flex-grow: 1;
}

/* Category Filters */
.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) 0;
    border-top: 1px solid rgba(100, 255, 218, 0.1);
    border-bottom: 1px solid rgba(100, 255, 218, 0.1);
}

.category-filter {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    padding: 0.6rem 1.2rem;
    background-color: transparent;
    border: 1px solid rgba(100, 255, 218, 0.3);
    color: var(--color-text);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.category-filter:hover {
    background-color: rgba(100, 255, 218, 0.1);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.category-filter--active {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-bg);
    font-weight: 600;
}

.category-filter--active:hover {
    background-color: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    color: var(--color-bg);
}

/* Hidden Articles (for Load More) */
.article-card--hidden {
    display: none;
}

/* Load More Button */
.articles__load-more {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-lg);
}

.load-more-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    background-color: transparent;
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-base);
}

.load-more-btn:hover {
    background-color: rgba(100, 255, 218, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(100, 255, 218, 0.2);
}

.load-more-btn__icon {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-base);
}

.load-more-btn:hover .load-more-btn__icon {
    transform: translateY(3px);
}

.load-more-btn--hidden {
    display: none;
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    padding: var(--spacing-xl) 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.contact__content {
    max-width: 700px;
    margin: 0 auto;
}

.contact__text {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-form__group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.contact-form__label {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-accent);
}

.contact-form__input,
.contact-form__textarea {
    padding: 0.875rem;
    background-color: var(--color-bg-card);
    border: 1px solid rgba(100, 255, 218, 0.2);
    border-radius: var(--border-radius);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.contact-form__input:focus,
.contact-form__textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(100, 255, 218, 0.1);
}

.contact-form__textarea {
    resize: vertical;
    min-height: 150px;
}

.contact-form__submit {
    padding: 1rem 2rem;
    background-color: transparent;
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
    font-family: var(--font-mono);
    font-size: 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-base);
    align-self: flex-start;
}

.contact-form__submit:hover {
    background-color: rgba(100, 255, 218, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(100, 255, 218, 0.2);
}

/* Contact Links */
.contact__links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.contact__link {
    font-family: var(--font-mono);
    font-size: 1rem;
    padding: 0.75rem 1.5rem;
    border: 1px solid rgba(100, 255, 218, 0.3);
    border-radius: var(--border-radius);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.contact__link-icon {
    width: 20px;
    height: 20px;
    transition: all var(--transition-base);
}

.contact__link:hover {
    background-color: rgba(100, 255, 218, 0.1);
    border-color: var(--color-accent);
    transform: translateY(-3px);
}

.contact__link:hover .contact__link-icon {
    filter: drop-shadow(0 0 6px var(--color-accent));
    transform: scale(1.1);
}

/* Success Message */
.success-message {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-accent);
    color: var(--color-bg);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    transition: bottom var(--transition-base);
    z-index: 2000;
    font-weight: 600;
}

.success-message.show {
    bottom: var(--spacing-md);
}

/* ===================================
   Article Page & Markdown Styles
   =================================== */
.article-page {
    padding-top: 100px; /* Space for fixed nav */
    padding-bottom: var(--spacing-xl);
    min-height: 100vh;
}

.article-navigation {
    margin-bottom: var(--spacing-lg);
}

.back-link {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-accent);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.back-link:hover {
    text-decoration: underline;
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
    color: var(--color-heading);
    margin-top: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.article-content h1 {
    font-size: 2.5rem;
    margin-top: 0;
    margin-bottom: 2.5rem;
    padding-bottom: 0;
    border-bottom: none;
}

.article-content h2 {
    font-size: 1.8rem;
    padding-bottom: 0;
    border-bottom: none;
}

.article-content h3 {
    font-size: 1.4rem;
}

.article-content p {
    margin-bottom: 2rem;
}

.article-content ul,
.article-content ol {
    margin-bottom: 2rem;
    padding-left: 1.5rem;
}

.article-content li {
    margin-bottom: 0.75rem;
}

.article-content a {
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.article-content a:hover {
    border-bottom-color: var(--color-accent);
}

.article-content blockquote {
    border-left: 4px solid var(--color-accent);
    padding-left: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    color: var(--color-text);
    background: rgba(100, 255, 218, 0.05);
    padding: 1.5rem;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.article-content code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background-color: rgba(100, 255, 218, 0.1);
    color: var(--color-accent);
    padding: 0.2em 0.4em;
    border-radius: 3px;
}

.article-content pre {
    background-color: var(--color-bg-alt);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(100, 255, 218, 0.1);
}

.article-content pre code {
    background-color: transparent;
    padding: 0;
    color: var(--color-text);
    font-size: 0.9rem;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin: 2rem 0;
    border: 1px solid rgba(100, 255, 218, 0.1);
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.article-content th,
.article-content td {
    padding: 0.75rem;
    border: 1px solid rgba(100, 255, 218, 0.2);
    text-align: left;
}

.article-content th {
    background-color: rgba(100, 255, 218, 0.1);
    color: var(--color-accent);
    font-weight: 600;
}

.article-content tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.02);
}

.loading-spinner {
    text-align: center;
    padding: 3rem;
    color: var(--color-accent);
    font-family: var(--font-mono);
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid rgba(100, 255, 218, 0.1);
}

.footer__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.footer__info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.footer__text {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.footer__back-to-top {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-accent);
    transition: transform var(--transition-fast);
}

.footer__back-to-top:hover {
    transform: translateY(-3px);
}

/* Footer Social Links */
.footer__social {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.footer__social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
    border-radius: var(--border-radius);
}

.footer__social-link:hover {
    color: var(--color-accent);
    background-color: rgba(100, 255, 218, 0.1);
    transform: translateY(-3px);
}

.footer__social-link:hover .social-icon {
    filter: drop-shadow(0 0 8px var(--color-accent));
}

/* ===================================
   Responsive Design - Mobile
   =================================== */
@media (max-width: 768px) {
    /* Navigation */
    .nav__menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: calc(100vh - 70px);
        background-color: var(--color-bg-alt);
        flex-direction: column;
        padding: var(--spacing-lg) var(--spacing-md);
        gap: var(--spacing-md);
        transition: right var(--transition-base);
        box-shadow: var(--shadow-lg);
        align-items: flex-start;
    }
    
    .nav__menu.active {
        right: 0;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__toggle.active .nav__toggle-line:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }
    
    .nav__toggle.active .nav__toggle-line:nth-child(2) {
        opacity: 0;
    }
    
    .nav__toggle.active .nav__toggle-line:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    /* Hero */
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .hero__description {
        max-width: 100%;
    }
    
    .hero__cta-group {
        flex-direction: column;
        width: 100%;
    }
    
    .hero__cta {
        width: 100%;
    }
    
    .hero__social {
        justify-content: center;
    }
    
    .split-card {
        max-width: 300px;
        height: 300px;
    }
    
    .split-card__icon {
        width: 60px;
        height: 60px;
    }
    
    /* About */
    .about__content {
        grid-template-columns: 1fr;
    }
    
    /* Articles */
    .articles__list {
        grid-template-columns: 1fr;
    }
    
    .article-card--featured {
        grid-template-columns: 1fr;
    }
    
    .article-card--featured .article-card__thumbnail {
        min-height: 200px;
    }
    
    .category-filters {
        gap: var(--spacing-xs);
    }
    
    .category-filter {
        font-size: 0.8rem;
        padding: 0.5rem 1rem;
    }
    
    /* Projects */
    .projects__grid {
        grid-template-columns: 1fr;
    }
    
    /* Spacing adjustments */
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .section-heading::after {
        display: none;
    }
    
    /* Footer */
    .footer__content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer__info {
        flex-direction: column;
        text-align: center;
    }
    
    .footer__social {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .hero__name {
        font-size: 2rem;
    }
    
    .hero__tagline {
        font-size: 1.25rem;
    }
    
    .split-card {
        grid-template-columns: 1fr;
        height: auto;
        gap: 0.75rem;
    }
    
    .split-card__side {
        padding: var(--spacing-sm);
    }
}