/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
    /* Colors */
    --color-primary: hsl(260, 100%, 65%);
    --color-primary-dark: hsl(260, 100%, 55%);
    --color-primary-light: hsl(260, 100%, 75%);
    --color-secondary: hsl(180, 100%, 50%);
    --color-accent: hsl(320, 100%, 60%);
    
    --color-bg-primary: hsl(230, 25%, 8%);
    --color-bg-secondary: hsl(230, 20%, 12%);
    --color-bg-tertiary: hsl(230, 18%, 16%);
    
    --color-text-primary: hsl(0, 0%, 95%);
    --color-text-secondary: hsl(0, 0%, 70%);
    --color-text-tertiary: hsl(0, 0%, 50%);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
    --gradient-orb-1: radial-gradient(circle, rgba(138, 43, 226, 0.15) 0%, transparent 70%);
    --gradient-orb-2: radial-gradient(circle, rgba(0, 255, 255, 0.1) 0%, transparent 70%);
    --gradient-orb-3: radial-gradient(circle, rgba(255, 20, 147, 0.12) 0%, transparent 70%);
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 4rem;
    
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Borders & Radius */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --border-radius-2xl: 1.5rem;
    --border-radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(138, 43, 226, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Z-index */
    --z-navbar: 1000;
    --z-modal: 2000;
    --z-tooltip: 3000;
}

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

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

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

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

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ============================================
   Utility Classes
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section {
    padding: var(--space-3xl) 0;
    position: relative;
}

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

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-navbar);
    padding: var(--space-md) 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(18, 18, 32, 0.9);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
    padding: var(--space-sm) 0;
}

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

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    gap: var(--space-xl);
}

.nav-link {
    position: relative;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-base);
    padding: var(--space-xs) 0;
}

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

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

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--color-text-primary);
    border-radius: var(--border-radius-full);
    transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: -1;
}

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

.orb-1 {
    width: 500px;
    height: 500px;
    top: -10%;
    right: -10%;
    background: var(--gradient-orb-1);
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    bottom: -5%;
    left: -5%;
    background: var(--gradient-orb-2);
    animation-delay: -7s;
}

.orb-3 {
    width: 350px;
    height: 350px;
    top: 40%;
    left: 50%;
    background: var(--gradient-orb-3);
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -50px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

.hero-content {
    max-width: 800px;
}

.hero-greeting {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: var(--font-weight-extrabold);
    line-height: 1.1;
    margin-bottom: var(--space-md);
    animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-subtitle {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.6s ease 0.6s both;
}

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

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease 0.8s both;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease 1s both;
}

.social-links {
    display: flex;
    gap: var(--space-md);
    animation: fadeInUp 0.6s ease 1.2s both;
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-lg);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.social-link i {
    font-size: var(--font-size-lg);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    animation: fadeInUp 0.6s ease 1.4s both;
}

.scroll-down {
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius-full);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 0;
    gap: 5px;
}

.scroll-down span {
    width: 4px;
    height: 8px;
    background: var(--color-primary);
    border-radius: var(--border-radius-full);
    animation: scrollDown 2s ease-in-out infinite;
}

.scroll-down span:nth-child(2) {
    animation-delay: 0.2s;
}

@keyframes scrollDown {
    0%, 100% {
        opacity: 0;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
        transform: translateY(10px);
    }
}

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

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.1) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.btn:hover::before {
    opacity: 1;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

/* ============================================
   Section Headers
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: var(--font-weight-extrabold);
    margin-bottom: var(--space-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

/* ============================================
   About Section
   ============================================ */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-3xl);
    align-items: center;
}

.about-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: var(--border-radius-2xl);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    aspect-ratio: 1;
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-overlay {
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    opacity: 0.1;
    mix-blend-mode: overlay;
    transition: opacity var(--transition-base);
}

.image-wrapper:hover .image-overlay {
    opacity: 0.2;
}

.about-heading {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
    padding: var(--space-lg) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ============================================
   Skills Section
   ============================================ */
.skills {
    background: var(--color-bg-secondary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.skill-category {
    padding: var(--space-xl);
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-xl);
    transition: all var(--transition-base);
}

.skill-category:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-xl);
}

.category-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--space-md);
    font-size: var(--font-size-2xl);
}

.category-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-md);
}

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

.skill-tag {
    padding: var(--space-xs) var(--space-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    transform: scale(1.05);
}

/* ============================================
   Projects Section
   ============================================ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-xl);
}

.project-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.project-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--color-bg-tertiary);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

.project-links {
    display: flex;
    gap: var(--space-md);
}

.project-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
}

.project-link:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    transform: scale(1.1);
}

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

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

.project-tag {
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.project-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-sm);
}

.project-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    background: var(--color-bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-3xl);
}

.contact-info h3 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-md);
}

.contact-info > p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.8;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.contact-item {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    margin-bottom: 4px;
}

.contact-item a {
    color: var(--color-text-primary);
    transition: color var(--transition-fast);
}

.contact-item a:hover {
    color: var(--color-primary);
}

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

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
}

.form-group input,
.form-group textarea {
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    color: var(--color-text-primary);
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(138, 43, 226, 0.1);
}

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

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--space-xl) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    background: var(--color-bg-primary);
}

.footer-content {
    text-align: center;
}

.footer-content p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.footer-tagline {
    margin-top: var(--space-xs);
}

.footer-tagline i {
    color: var(--color-accent);
}

/* ============================================
   Animations & Utilities
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 968px) {
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(18, 18, 32, 0.98);
        backdrop-filter: blur(20px);
        padding: var(--space-xl);
        gap: var(--space-md);
        box-shadow: var(--shadow-xl);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .section {
        padding: var(--space-2xl) 0;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
}