/* ==========================================================================
   Design Tokens & Theme Variables
   ========================================================================== */
:root {
    /* Futuristic Dark Theme Variables */
    --clr-bg-primary: #030712;
    --clr-bg-secondary: rgba(15, 23, 42, 0.6);
    --clr-text-primary: #f8fafc;
    --clr-text-secondary: #94a3b8;
    
    /* Neon Accents */
    --clr-neon-cyan: #06b6d4;
    --clr-neon-purple: #d946ef;
    --clr-neon-green: #10b981;
    --clr-neon-orange: #f97316;
    
    /* Glow shadows */
    --glow-cyan: 0 0 20px rgba(6, 182, 212, 0.45);
    --glow-purple: 0 0 20px rgba(217, 70, 239, 0.45);
    
    /* Glassmorphism */
    --glass-bg: rgba(15, 23, 42, 0.65);
    --glass-border: rgba(255, 255, 255, 0.05);
    --glass-border-hover: rgba(6, 182, 212, 0.3);

    /* Fonts */
    --font-sans: 'Plus Jakarta Sans', -apple-system, sans-serif;
    --font-mono: 'Fira Code', monospace;
    --font-cyber: 'Orbitron', sans-serif;

    --transition-cyber: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Variables (Subtle cyber light mode) */
body.light-theme {
    --clr-bg-primary: #f1f5f9;
    --clr-bg-secondary: rgba(255, 255, 255, 0.7);
    --clr-text-primary: #0f172a;
    --clr-text-secondary: #475569;
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(15, 23, 42, 0.06);
    --glass-border-hover: rgba(217, 70, 239, 0.3);
}

/* ==========================================================================
   Global Reset & Cyber Layout
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

/* Ambient glow orbs in the background */
.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    z-index: 1;
    pointer-events: none;
    opacity: 0.4;
    transition: var(--transition-cyber);
}

.orb-1 {
    width: 400px;
    height: 400px;
    background-color: var(--clr-neon-cyan);
    top: 10%;
    right: 5%;
}

.orb-2 {
    width: 350px;
    height: 350px;
    background-color: var(--clr-neon-purple);
    top: 50%;
    left: -100px;
}

/* Futuristic grid lines background */
.grid-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
    background-size: 50px 50px;
    opacity: 0.15;
    background-image: 
        linear-gradient(to right, rgba(6, 182, 212, 0.1) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(6, 182, 212, 0.1) 1px, transparent 1px);
}

body.light-theme .grid-background {
    opacity: 0.08;
}

section {
    position: relative;
    z-index: 3;
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    background-color: rgba(3, 7, 18, 0.6);
    transition: var(--transition-cyber);
}

body.light-theme .navbar {
    background-color: rgba(241, 245, 249, 0.6);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-link {
    font-family: var(--font-cyber);
    font-weight: 900;
    font-size: 1.5rem;
    text-decoration: none;
    color: var(--clr-text-primary);
    letter-spacing: -0.05em;
}

.logo-accent {
    color: var(--clr-neon-cyan);
    text-shadow: var(--glow-cyan);
}

.nav-menu {
    display: flex;
    gap: 3rem;
}

.nav-item {
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--clr-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
    transition: var(--transition-cyber);
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--clr-neon-cyan);
    box-shadow: var(--glow-cyan);
    transition: var(--transition-cyber);
}

.nav-item:hover {
    color: var(--clr-text-primary);
}

.nav-item:hover::after {
    width: 100%;
}

/* Theme Button toggle */
.theme-btn {
    background: none;
    border: 1px solid var(--glass-border);
    cursor: pointer;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--clr-text-primary);
    transition: var(--transition-cyber);
}

.theme-btn:hover {
    border-color: var(--clr-neon-cyan);
    box-shadow: var(--glow-cyan);
}

.dark-theme .icon-sun { display: block; }
.dark-theme .icon-moon { display: none; }
.light-theme .icon-sun { display: none; }
.light-theme .icon-moon { display: block; }

/* ==========================================================================
   Hero & Terminal Windows
   ========================================================================== */
.hero-section {
    min-height: 95vh;
    display: flex;
    align-items: center;
    padding: 8rem 2rem 4rem;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.hero-split {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
    align-items: center;
}

.hero-tagline {
    font-family: var(--font-cyber);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    display: inline-block;
    margin-bottom: 1.5rem;
}

.neon-text {
    color: var(--clr-neon-cyan);
    text-shadow: var(--glow-cyan);
}

.hero-title {
    font-family: var(--font-cyber);
    font-size: 4rem;
    line-height: 1;
    margin-bottom: 2rem;
    position: relative;
    letter-spacing: -0.02em;
}

/* Glitch styling (visual effect on header) */
.glitch::after {
    content: attr(data-text);
    position: absolute;
    left: 2px;
    text-shadow: -1px 0 red;
    top: 0;
    color: var(--clr-text-primary);
    background: var(--clr-bg-primary);
    overflow: hidden;
    clip: rect(0, 900px, 0, 0);
    animation: noise-anim 2s infinite linear alternate-reverse;
}

.hero-subtitle {
    font-size: 1.2rem;
    line-height: 1.7;
    margin-bottom: 3rem;
    color: var(--clr-text-secondary);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.2rem;
    font-family: var(--font-cyber);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-cyber);
}

.btn-primary {
    background-color: var(--clr-neon-cyan);
    color: #000;
    font-weight: 700;
    border: none;
    box-shadow: var(--glow-cyan);
}

.btn-primary:hover {
    background-color: #ffffff;
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.6);
}

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

.btn-secondary:hover {
    border-color: var(--clr-neon-purple);
    box-shadow: var(--glow-purple);
    color: #ffffff;
}

/* Terminal Window Styles */
.terminal-window {
    background-color: rgba(10, 15, 30, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    z-index: 10;
}

.terminal-header {
    background-color: rgba(3, 7, 18, 0.8);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.terminal-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 8px;
}

.terminal-btn.close { background-color: #ef4444; }
.terminal-btn.minimize { background-color: #eab308; }
.terminal-btn.maximize { background-color: #22c55e; }

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--clr-text-secondary);
    margin-left: auto;
}

.terminal-body {
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.7;
    height: 250px;
    overflow-y: auto;
}

.log-line {
    margin-bottom: 0.5rem;
}

.text-cyan { color: var(--clr-neon-cyan); }
.text-green { color: var(--clr-neon-green); }
.text-purple { color: var(--clr-neon-purple); }

.blink-cursor {
    animation: blink 1s step-end infinite;
}

/* ==========================================================================
   Section Layouts & General Styles
   ========================================================================== */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 8rem 2rem;
}

.section-title {
    font-family: var(--font-cyber);
    font-size: 2.5rem;
    text-transform: uppercase;
    letter-spacing: -0.01em;
    margin-bottom: 2.5rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--clr-text-secondary);
    margin: -1.5rem auto 4.5rem;
    max-width: 600px;
}

.grid-layout {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 5rem;
    align-items: center;
}

.paragraph {
    font-size: 1.1rem;
    margin-bottom: 1.8rem;
    color: var(--clr-text-secondary);
}

/* ==========================================================================
   About Stats Card (Glowing Glassmorphism)
   ========================================================================== */
.about-stats-card {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    transition: var(--transition-cyber);
}

.about-stats-card:hover {
    border-color: var(--clr-neon-purple);
    box-shadow: var(--glow-purple);
}

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

.stat-number {
    font-family: var(--font-cyber);
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.1;
    display: block;
}

.stat-label {
    font-family: var(--font-cyber);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--clr-text-secondary);
    margin-top: 0.5rem;
}

/* ==========================================================================
   Services/Projects Grid (Neon Cards)
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.service-card {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 3rem;
    transition: var(--transition-cyber);
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
}

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

.service-icon {
    width: 3.5rem;
    height: 3.5rem;
    color: var(--clr-neon-cyan);
    margin-bottom: 2rem;
    transition: var(--transition-cyber);
}

.service-card:hover .service-icon {
    color: var(--clr-neon-purple);
    transform: scale(1.1);
}

.service-card-title {
    font-family: var(--font-cyber);
    font-size: 1.4rem;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.service-card-text {
    font-size: 1rem;
    color: var(--clr-text-secondary);
    line-height: 1.7;
}

/* ==========================================================================
   Expertise Section (Matrix of Categories)
   ========================================================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}

.skill-category {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2.5rem;
    transition: var(--transition-cyber);
}

.skill-category:hover {
    border-color: var(--clr-neon-cyan);
}

.skill-category h3 {
    font-family: var(--font-cyber);
    font-size: 1.25rem;
    text-transform: uppercase;
    color: var(--clr-neon-cyan);
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 1rem;
}

.skill-category ul {
    list-style: none;
}

.skill-category li {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    margin-bottom: 0.8rem;
    color: var(--clr-text-secondary);
    display: flex;
    align-items: center;
}

.skill-category li::before {
    content: '>';
    color: var(--clr-neon-purple);
    margin-right: 10px;
    font-weight: bold;
}

/* ==========================================================================
   Contact Form & Inputs
   ========================================================================== */
.contact-form-container {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 3rem;
    box-shadow: 0 20px 45px rgba(0,0,0,0.3);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group label {
    font-family: var(--font-cyber);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--clr-text-secondary);
    margin-bottom: 0.5rem;
    display: block;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 1rem 1.2rem;
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: 1rem;
    border: 1px solid var(--glass-border);
    background-color: rgba(3, 7, 18, 0.4);
    color: var(--clr-text-primary);
    transition: var(--transition-cyber);
    outline: none;
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--clr-neon-cyan);
    box-shadow: var(--glow-cyan);
}

/* Form Feedback styles */
.form-feedback-message {
    padding: 1rem;
    border-radius: 8px;
    font-family: var(--font-cyber);
    font-size: 0.85rem;
    text-align: center;
    margin-top: 1.5rem;
    text-transform: uppercase;
}

.form-feedback-message.success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--clr-neon-green);
    border: 1px solid var(--clr-neon-green);
    text-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
}

.form-feedback-message.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid #ef4444;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    padding: 5rem 2rem;
    border-top: 1px solid var(--glass-border);
    background-color: rgba(3, 7, 18, 0.8);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    font-size: 0.9rem;
    color: var(--clr-text-secondary);
}

.footer-links {
    display: flex;
    gap: 3rem;
}

.footer-links a {
    text-decoration: none;
    font-family: var(--font-cyber);
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--clr-text-secondary);
    transition: var(--transition-cyber);
}

.footer-links a:hover {
    color: var(--clr-neon-cyan);
    text-shadow: var(--glow-cyan);
}

/* ==========================================================================
   Scroll Animations & Keyframes
   ========================================================================== */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

@keyframes blink {
    from, to { color: transparent }
    50% { color: var(--clr-neon-cyan); }
}

@keyframes noise-anim {
    0% { clip: rect(40px, 9999px, 15px, 0); }
    10% { clip: rect(12px, 9999px, 85px, 0); }
    20% { clip: rect(85px, 9999px, 5px, 0); }
    30% { clip: rect(34px, 9999px, 55px, 0); }
    40% { clip: rect(61px, 9999px, 20px, 0); }
    50% { clip: rect(98px, 9999px, 90px, 0); }
    60% { clip: rect(10px, 9999px, 35px, 0); }
    70% { clip: rect(75px, 9999px, 60px, 0); }
    80% { clip: rect(55px, 9999px, 20px, 0); }
    90% { clip: rect(40px, 9999px, 80px, 0); }
    100% { clip: rect(25px, 9999px, 45px, 0); }
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
    .hero-split {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .grid-layout {
        grid-template-columns: 1fr;
        gap: 4rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .nav-menu {
        display: none; /* Hide top links on mobile */
    }

    .footer-container {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
}