/* ==========================================================================
   CSS Variables & Theme Tokens
   ========================================================================== */
:root {
    /* Color Palette - Premium Dark Theme */
    --bg-base: #030014;
    --bg-surface: rgba(255, 255, 255, 0.03);
    --bg-surface-hover: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-primary: #7c3aed; /* Deep Purple */
    --accent-secondary: #0ea5e9; /* Neon Blue */
    --accent-gradient: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    
    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 'Outfit', system-ui, -apple-system, sans-serif;
    
    /* Spacing & Layout */
    --nav-height: 80px;
    --max-width: 1100px;
    --section-pad: 100px;
    
    /* Animations */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

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

/* Background effects */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: 
        radial-gradient(circle at 15% 50%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(14, 165, 233, 0.08) 0%, transparent 50%);
    z-index: -1;
    pointer-events: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    line-height: 1.2;
}

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

ul {
    list-style: none;
}

/* ==========================================================================
   Typography & Utilities
   ========================================================================== */
.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 3rem;
    position: relative;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.section-title::after {
    content: '';
    height: 1px;
    background: var(--glass-border);
    flex: 1;
    max-width: 300px;
}

.text-center { text-align: center; }
.text-center::after { display: none; }

.section-padding {
    padding: var(--section-pad) 0;
}

/* Glassmorphism Utilities */
.glass-card {
    background: var(--bg-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    transition: transform var(--transition-normal), border-color var(--transition-normal), background var(--transition-normal);
}

.glass-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.2);
    background: var(--bg-surface-hover);
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-primary-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-weight: 600;
    transition: all var(--transition-normal);
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    padding: 0.8rem 1.5rem;
    border: none;
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.5);
    transform: translateY(-2px);
}

.btn-primary-sm {
    background: var(--accent-gradient);
    color: #fff;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    box-shadow: 0 2px 10px rgba(124, 58, 237, 0.3);
}

.btn-primary-sm:hover {
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.5);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    padding: 0.8rem 1.5rem;
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    background: rgba(124, 58, 237, 0.1);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */
.nav-container, main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.glass-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(3, 0, 20, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    transition: height var(--transition-normal), background var(--transition-normal);
}

.glass-nav.scrolled {
    height: 70px;
    background: rgba(3, 0, 20, 0.9);
}

.nav-container {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--accent-secondary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a:not(.btn-primary-sm) {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-links a:not(.btn-primary-sm):hover {
    color: var(--accent-secondary);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-normal);
}

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

.hero-content {
    flex: 1;
    max-width: 600px;
    z-index: 2;
}

.greeting {
    color: var(--accent-secondary);
    font-family: var(--font-mono, monospace);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.hero-section h1 {
    font-size: clamp(3rem, 6vw, 4.5rem);
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hero-desc {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 500px;
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.hero-graphics {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    display: none; /* Hidden on mobile */
}

@media (min-width: 992px) {
    .hero-graphics {
        display: flex;
    }
}

.glow-orb {
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    filter: blur(80px);
    z-index: -1;
    animation: float 10s infinite ease-in-out alternate;
}

.orb-1 {
    background: rgba(124, 58, 237, 0.4);
    top: 10%;
    left: 20%;
}

.orb-2 {
    background: rgba(14, 165, 233, 0.3);
    bottom: 10%;
    right: 20%;
    animation-delay: -5s;
}

.decorative-card {
    padding: 1.5rem;
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.6);
}

.decorative-card pre {
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    color: #e2e8f0;
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 3rem;
    align-items: center;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

.image-wrapper {
    position: relative;
    width: 100%;
    max-width: 300px;
    aspect-ratio: 1/1;
    margin: 0 auto;
    padding: 0;
    overflow: hidden;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(124,58,237,0.2) 0%, rgba(14,165,233,0.2) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    font-family: var(--font-heading);
    font-weight: 800;
    color: rgba(255,255,255,0.1);
}

.image-wrapper::after {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: var(--accent-primary);
    mix-blend-mode: overlay;
    opacity: 0.5;
    transition: var(--transition-normal);
}

.image-wrapper:hover::after {
    opacity: 0;
}

/* ==========================================================================
   Skills Section
   ========================================================================== */
.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-category h3 {
    margin-bottom: 1.5rem;
    color: var(--accent-secondary);
    font-size: 1.2rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tags span {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.skill-tags span:hover {
    border-color: var(--accent-secondary);
    color: var(--text-primary);
    background: rgba(14, 165, 233, 0.1);
}

/* ==========================================================================
   Projects Section
   ========================================================================== */
.projects-grid {
    display: grid;
    gap: 3rem;
}

.project-card {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.project-overline {
    color: var(--accent-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.project-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.project-description {
    background: rgba(3, 0, 20, 0.5);
    padding: 1.5rem;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.project-tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 1rem 0;
    font-family: var(--font-mono, monospace);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-links a {
    color: var(--text-primary);
}

.project-links a:hover {
    color: var(--accent-secondary);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-section {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    padding-bottom: 150px;
}

.contact-text {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--glass-border);
    background: rgba(3, 0, 20, 0.5);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.social-links a {
    color: var(--text-muted);
}

.social-links a:hover {
    color: var(--accent-secondary);
}

footer p {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-family: var(--font-mono, monospace);
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(20px, -20px); }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: var(--nav-height);
        right: -100%;
        width: 100%;
        height: calc(100vh - var(--nav-height));
        background: rgba(3, 0, 20, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: center;
        transition: right var(--transition-normal);
    }

    .nav-links.active {
        right: 0;
    }

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

    .mobile-menu-btn.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1.5rem;
    }
}

/* ==========================================================================
   Blog Styles
   ========================================================================== */
.blog-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--section-pad) 2rem;
    padding-top: calc(var(--nav-height) + 40px);
}

.blog-header {
    margin-bottom: 3rem;
    text-align: left;
}

.blog-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.blog-meta {
    color: var(--text-muted);
    font-family: var(--font-mono, monospace);
    font-size: 0.9rem;
}

.blog-content {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.blog-content p {
    margin-bottom: 1.8rem;
}

.blog-content p:first-of-type {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.blog-content strong {
    color: var(--accent-secondary);
    font-weight: 600;
}

/* Highlight boxes for blog */
.blog-highlight {
    background: rgba(124, 58, 237, 0.1);
    border-left: 4px solid var(--accent-primary);
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 0 8px 8px 0;
    font-style: italic;
}

/* ==========================================================================
   Blog Hub Listing Styles
   ========================================================================== */
.blog-grid {
    display: grid;
    gap: 2rem;
    margin-top: 2rem;
}

.blog-card {
    padding: 2rem;
    transition: transform var(--transition-normal), border-color var(--transition-normal), background var(--transition-normal);
}

.blog-card-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.blog-card-meta {
    font-family: var(--font-mono, monospace);
    font-size: 0.85rem;
    color: var(--accent-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.blog-card-title {
    font-size: 1.8rem;
    line-height: 1.3;
}

.blog-card-title a {
    color: var(--text-primary);
}

.blog-card-title a:hover {
    color: var(--accent-secondary);
}

.blog-card-excerpt {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
}

.blog-card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-primary);
    font-weight: 600;
    margin-top: 1rem;
}

.blog-card-link:hover {
    color: var(--accent-secondary);
}

.back-link {
    display: inline-block;
    margin-bottom: 2rem;
    color: var(--text-muted);
    font-weight: 600;
}

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