/* ============================================
   MODERN DARK PORTFOLIO - SENIOR FULLSTACK DEVELOPER
   ============================================ */

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

:root {
    /* Dark Theme Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #121218;
    --bg-tertiary: #1a1a24;
    
    /* Neon Accents */
    --neon-cyan: #00f0ff;
    --neon-magenta: #ff00aa;
    --neon-purple: #9d00ff;
    --neon-green: #00ff88;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    --gradient-secondary: linear-gradient(135deg, var(--neon-magenta), var(--neon-purple));
    --gradient-accent: linear-gradient(135deg, #00f0ff, #00ff88);
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #b4b4c8;
    --text-muted: #6b6b80;
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --glow-cyan: 0 0 20px rgba(0, 240, 255, 0.5);
    --glow-magenta: 0 0 20px rgba(255, 0, 170, 0.5);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
    position: relative;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(157, 0, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0, 240, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(255, 0, 170, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
    animation: backgroundPulse 10s ease-in-out infinite;
}

@keyframes backgroundPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Floating animation for particles */
@keyframes float {
    0%, 100% { 
        transform: translateY(0) translateX(0);
        opacity: 0.6;
    }
    50% { 
        transform: translateY(-20px) translateX(10px);
        opacity: 1;
    }
}

.animate-float {
    animation: float 4s ease-in-out infinite;
}

.delay-500 {
    animation-delay: 0.5s;
}

.delay-1000 {
    animation-delay: 1s;
}

.delay-1500 {
    animation-delay: 1.5s;
}

/* Draw animation for SVG paths */
@keyframes draw {
    from {
        stroke-dashoffset: 1000;
    }
    to {
        stroke-dashoffset: 0;
    }
}

.animate-draw {
    stroke-dasharray: 1000;
    animation: draw 3s ease-in-out infinite;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

/* ============================================
   FIXED NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: all var(--transition-normal);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    letter-spacing: -0.5px;
    transition: transform var(--transition-fast);
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color var(--transition-normal);
    letter-spacing: 0.3px;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--neon-cyan);
}

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

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
    animation: heroGlow 8s ease-in-out infinite;
}

@keyframes heroGlow {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.1); }
}

.hero .container {
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
}

.hero-title .gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    animation: gradientShift 3s ease infinite;
    background-size: 200% 200%;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero .lead {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 12px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
    letter-spacing: 0.3px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    border-color: var(--neon-cyan);
    transform: translateY(-3px);
    box-shadow: var(--glow-cyan);
}

.btn-small {
    padding: 0.7rem 1.5rem;
    font-size: 0.9rem;
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
    padding: 100px 0;
    position: relative;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    text-align: center;
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   FEATURE CARDS (What I Do)
   ============================================ */
.tech-stack-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 3rem auto;
    padding: 2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
}

.tech-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    transition: all var(--transition-normal);
    cursor: pointer;
    aspect-ratio: 1;
}

.tech-icon:hover {
    transform: translateY(-5px) scale(1.05);
    border-color: var(--neon-cyan);
    box-shadow: var(--glow-cyan);
    background: var(--glass-bg);
}

.tech-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: brightness(1.1);
    transition: all var(--transition-normal);
}

.tech-icon:hover img {
    filter: brightness(1.3) drop-shadow(0 0 10px rgba(0, 240, 255, 0.5));
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

@media (min-width: 1200px) {
    .grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: 20px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card:hover::before {
    opacity: 0.05;
}

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

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.card p {
    color: var(--text-secondary);
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.about-text h2,
.skills h2,
.experience h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-text p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.skill-item {
    margin-bottom: 2rem;
}

.skill-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.skill-bar {
    background: var(--bg-tertiary);
    height: 12px;
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.skill-progress {
    background: var(--gradient-primary);
    height: 100%;
    border-radius: 10px;
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow: var(--glow-cyan);
}

.skill-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ============================================
   TIMELINE
   ============================================ */
.experience {
    margin-top: 4rem;
}

.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 1.5rem;
    padding-left: 25px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -46px;
    top: 3px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--neon-cyan);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 2px var(--neon-cyan), var(--glow-cyan);
}

.timeline-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.timeline-item .company {
    color: var(--neon-magenta);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9rem;
}

.timeline-item-hidden {
    display: none;
}

.timeline-item-hidden.show {
    display: block;
    animation: fadeInUp 0.5s ease-out;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.project-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: 20px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--neon-cyan);
    box-shadow: var(--glow-cyan);
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin: 1.5rem 0 2rem;
}

.tag {
    background: var(--bg-tertiary);
    color: var(--neon-cyan);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--glass-border);
    transition: all var(--transition-fast);
}

.tag:hover {
    background: var(--glass-bg);
    border-color: var(--neon-cyan);
    transform: translateY(-2px);
}

.center {
    text-align: center;
}

.center h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.center p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    margin-top: 3rem;
}

.contact-info h2,
.contact-form h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.info-item {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    transition: all var(--transition-normal);
}

.info-item:hover {
    border-color: var(--neon-cyan);
    transform: translateX(5px);
}

.info-item strong {
    display: block;
    color: var(--neon-cyan);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.info-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.info-item a:hover {
    color: var(--neon-cyan);
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--glass-bg);
    border: 2px solid var(--glass-border);
    border-radius: 12px;
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--neon-cyan);
    background: var(--bg-secondary);
    box-shadow: var(--glow-cyan);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--glass-border);
    padding: 3rem 0;
    margin-top: 6rem;
    text-align: center;
}

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

/* ============================================
   UTILITY CLASSES
   ============================================ */
.bg-light {
    background: var(--bg-secondary);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .container {
        padding: 0 1.5rem;
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: clamp(2rem, 10vw, 3rem);
    }
    
    .hero .lead {
        font-size: 1.1rem;
    }
    
    .nav-menu {
        gap: 1.5rem;
        font-size: 0.85rem;
    }
    
    .navbar .container {
        padding: 1rem 1.5rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .card,
    .project-card {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero {
        padding: 80px 0 40px;
    }
    
    .nav-menu {
        gap: 1rem;
    }
    
    .timeline {
        padding-left: 30px;
    }
    
    .timeline-item::before {
        left: -40px;
        width: 12px;
        height: 12px;
    }
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 6px;
    border: 3px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--neon-cyan);
}

/* ============================================
   SELECTION STYLING
   ============================================ */
::selection {
    background: var(--neon-cyan);
    color: var(--bg-primary);
}

::-moz-selection {
    background: var(--neon-cyan);
    color: var(--bg-primary);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
}

a {
    transition: all var(--transition-fast);
}

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Apply animations on scroll (you can add with JS) */
.animate-on-scroll {
    animation: fadeInUp 0.6s ease-out;
}