/* ===================================
   Design System & CSS Variables
   =================================== */
:root {
    /* Color Palette - Vibrant & Modern */
    --color-primary: hsl(250, 85%, 60%);
    --color-primary-light: hsl(250, 85%, 70%);
    --color-primary-dark: hsl(250, 85%, 50%);
    --color-secondary: hsl(320, 85%, 60%);
    --color-accent: hsl(180, 85%, 55%);
    
    /* Background Colors */
    --color-bg-dark: hsl(240, 20%, 8%);
    --color-bg-darker: hsl(240, 20%, 5%);
    --color-bg-card: hsla(240, 20%, 15%, 0.6);
    --color-bg-glass: hsla(240, 20%, 20%, 0.4);
    
    /* Text Colors */
    --color-text-primary: hsl(0, 0%, 98%);
    --color-text-secondary: hsl(0, 0%, 75%);
    --color-text-muted: hsl(0, 0%, 60%);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    --gradient-accent: linear-gradient(135deg, var(--color-accent), var(--color-primary));
    --gradient-orb-1: radial-gradient(circle, hsla(250, 85%, 60%, 0.3), transparent 70%);
    --gradient-orb-2: radial-gradient(circle, hsla(320, 85%, 60%, 0.3), transparent 70%);
    --gradient-orb-3: radial-gradient(circle, hsla(180, 85%, 55%, 0.3), transparent 70%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.3);
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    background: hsla(240, 20%, 8%, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid hsla(0, 0%, 100%, 0.05);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    padding: var(--spacing-sm) 0;
    background: hsla(240, 20%, 8%, 0.95);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

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

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-base);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.hero-background {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.gradient-orb {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    background: var(--gradient-orb-1);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.orb-2 {
    background: var(--gradient-orb-2);
    bottom: -200px;
    right: -200px;
    animation-delay: 7s;
}

.orb-3 {
    background: var(--gradient-orb-3);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(50px, -50px) scale(1.1); }
    66% { transform: translate(-50px, 50px) scale(0.9); }
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-greeting {
    font-size: 1.25rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.hero-name {
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

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

/* ===================================
   Buttons
   =================================== */
.btn {
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(124, 58, 237, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border-color: var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-bg-glass);
    transform: translateY(-2px);
}

/* ===================================
   Code Window
   =================================== */
.code-window {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    border: 1px solid hsla(0, 0%, 100%, 0.1);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.8s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.code-header {
    background: hsla(240, 20%, 10%, 0.8);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    gap: 0.5rem;
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-text-muted);
}

.code-dot:nth-child(1) { background: hsl(0, 70%, 60%); }
.code-dot:nth-child(2) { background: hsl(45, 70%, 60%); }
.code-dot:nth-child(3) { background: hsl(120, 70%, 60%); }

.code-content {
    padding: var(--spacing-lg);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
}

.code-content pre {
    margin: 0;
}

.code-keyword { color: hsl(320, 85%, 70%); }
.code-class { color: hsl(45, 85%, 70%); }
.code-string { color: hsl(120, 60%, 65%); }
.code-function { color: hsl(180, 85%, 65%); }

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

section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* ===================================
   About Section
   =================================== */
.about {
    background: var(--color-bg-darker);
}

.about-intro {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

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

.highlight-item {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid hsla(0, 0%, 100%, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
}

.highlight-item:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.highlight-icon {
    font-size: 2.5rem;
}

.highlight-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.highlight-content p {
    color: var(--color-text-secondary);
}

/* ===================================
   Skills Section
   =================================== */
.skills-grid {
    display: grid;
    gap: var(--spacing-xl);
}

.skill-category {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid hsla(0, 0%, 100%, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.category-title {
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
}

.skill-items {
    display: grid;
    gap: var(--spacing-md);
}

.skill-item {
    display: grid;
    gap: var(--spacing-sm);
}

.skill-name {
    font-weight: 500;
    color: var(--color-text-primary);
}

.skill-bar {
    height: 8px;
    background: hsla(0, 0%, 100%, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    animation: fillBar 1.5s ease-out;
}

@keyframes fillBar {
    from { width: 0; }
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.skill-tag {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-glass);
    border: 1px solid hsla(0, 0%, 100%, 0.1);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    transition: all var(--transition-base);
}

.skill-tag:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

/* ===================================
   Projects Section
   =================================== */
.projects {
    background: var(--color-bg-darker);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.project-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid hsla(0, 0%, 100%, 0.1);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-glow);
    border-color: var(--color-primary);
}

.project-image {
    height: 200px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    position: relative;
    overflow: hidden;
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

.project-link {
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid white;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.project-link:hover {
    background: white;
    color: var(--color-bg-dark);
}

.project-content {
    padding: var(--spacing-lg);
}

.project-title {
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
}

.project-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tech-tag {
    padding: 0.4rem 0.8rem;
    background: var(--color-bg-glass);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-sm);
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 500;
}

/* ===================================
   Contact Section
   =================================== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-intro {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.contact-methods {
    display: grid;
    gap: var(--spacing-md);
}

.contact-method {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid hsla(0, 0%, 100%, 0.1);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-base);
}

.contact-method:hover {
    border-color: var(--color-primary);
    transform: translateX(5px);
}

.contact-icon {
    font-size: 2rem;
}

.contact-details h3 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.contact-details p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.contact-form {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid hsla(0, 0%, 100%, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--color-text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--color-bg-glass);
    border: 1px solid hsla(0, 0%, 100%, 0.1);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px hsla(250, 85%, 60%, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--color-bg-darker);
    padding: var(--spacing-xl) 0;
    text-align: center;
    color: var(--color-text-secondary);
    border-top: 1px solid hsla(0, 0%, 100%, 0.05);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .hero-visual {
        order: -1;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: hsla(240, 20%, 8%, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        transition: all var(--transition-base);
        border-bottom: 1px solid hsla(0, 0%, 100%, 0.1);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-3xl: 3rem;
    }
    
    .hero {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    section {
        padding: var(--spacing-xl) 0;
    }
    
    .about-highlights {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}