/* ============================================
   CSS RESET & BASE STYLES
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color System */
    --color-bg: #0a0a0a;
    --color-bg-elevated: #141414;
    --color-bg-subtle: #1a1a1a;
    --color-text: #ffffff;
    --color-text-muted: #a0a0a0;
    --color-text-dim: #666666;
    --color-accent: #00ff88;
    --color-accent-dim: #00cc6a;
    --color-border: #2a2a2a;
    
    /* Typography */
    --font-display: 'JetBrains Mono', monospace;
    --font-body: 'Work Sans', sans-serif;
    
    /* Spacing Scale */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    --space-xxl: 10rem;
    
    /* Layout */
    --max-width: 1200px;
    --section-padding: clamp(4rem, 10vw, 8rem);
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

::selection {
    background: var(--color-accent);
    color: var(--color-bg);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(3rem, 8vw, 6rem); }
h2 { font-size: clamp(2rem, 5vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }

p {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--color-text-muted);
}

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

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-sm) var(--space-md);
    /*background: rgba(10, 10, 10, 0.8);*/
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: linear-gradient(90deg, rgba(0,255,136,0.1), transparent);
}

.header.scrolled {
    background: rgba(10, 10, 10, 0.95);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

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

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-text);
    position: relative;
    display: inline-block;
}

.logo::before {
    content: '[';
    color: var(--color-accent);
    margin-right: 4px;
}

.logo::after {
    content: ']';
    color: var(--color-accent);
    margin-left: 4px;
}

.nav-menu {
    display: flex;
    gap: var(--space-md);
    list-style: none;
}

.nav-link {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::before {
    content: '//';
    color: var(--color-accent);
    opacity: 0;
    margin-right: 8px;
    transition: opacity 0.3s ease;
}

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

.nav-link:hover::before {
    opacity: 1;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 8px;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all 0.3s ease;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--space-xl) var(--space-md);
    padding-top: 120px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(0, 255, 136, 0.03) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(0, 255, 136, 0.02) 0%, transparent 40%);
    animation: rotate 30s linear infinite;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: var(--max-width);
    width: 100%;
}

.hero-label {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: var(--space-sm);
    animation: fadeInUp 0.8s ease forwards;
}

.hero-title {
    margin-bottom: var(--space-sm);
    animation: fadeInUp 0.8s ease 0.1s forwards;
}

.hero-title .accent {
    color: var(--color-accent);
    display: inline-block;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 2rem);
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

.hero-tagline {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-dim);
    max-width: 600px;
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.8s ease 0.3s forwards;
}

.hero-cta {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

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

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 1rem 2rem;
    border: 2px solid;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-bg);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    background: var(--color-accent-dim);
    border-color: var(--color-accent-dim);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 255, 136, 0.3);
}

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

.btn-secondary:hover {
    border-color: var(--color-accent);
    background: rgba(0, 255, 136, 0.05);
    transform: translateY(-2px);
}

/* ============================================
   SECTION STYLES
   ============================================ */
.section {
    padding: var(--section-padding) var(--space-md);
    position: relative;
}

.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-header {
    margin-bottom: var(--space-lg);
}

.section-label {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: var(--space-xs);
}

.section-title {
    position: relative;
    display: inline-block;
}

.section-title::before {
    content: '//';
    color: var(--color-accent);
    margin-right: 12px;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    align-items: start;
}

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

.about-content p:last-child {
    margin-bottom: 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-sm);
}

.stat-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    padding: var(--space-md);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

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

.stat-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.stat-label {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--space-xs);
}

.stat-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-text);
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */
.experience-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

.experience-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    padding: var(--space-md);
    position: relative;
    transition: all 0.3s ease;
}

.experience-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--color-accent);
    transition: height 0.3s ease;
}

.experience-card:hover::after {
    height: 100%;
}

.experience-card:hover {
    border-color: var(--color-accent);
    transform: translateX(8px);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.experience-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.experience-period {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.experience-description {
    color: var(--color-text-muted);
    line-height: 1.8;
}

.experience-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-top: var(--space-sm);
}

.tag {
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--color-text-dim);
    background: var(--color-bg-subtle);
    border: 1px solid var(--color-border);
    padding: 0.4rem 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-md);
}

.skill-category {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    padding: var(--space-md);
    transition: all 0.3s ease;
}

.skill-category:hover {
    border-color: var(--color-accent);
}

.skill-category-title {
    font-size: 1rem;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.skill-category-title::before {
    content: '>';
    color: var(--color-accent);
    font-family: var(--font-display);
}

.skill-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.skill-item {
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    padding-left: var(--space-sm);
    position: relative;
    transition: all 0.3s ease;
}

.skill-item::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-text-dim);
    transition: all 0.3s ease;
}

.skill-item:hover {
    color: var(--color-text);
    padding-left: var(--space-md);
}

.skill-item:hover::before {
    color: var(--color-accent);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-cta {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    margin-bottom: var(--space-lg);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.contact-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    padding: var(--space-md);
    text-align: center;
    transition: all 0.3s ease;
}

.contact-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 255, 136, 0.1);
}

.contact-icon {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.contact-label {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--space-xs);
}

.contact-value {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    word-break: break-all;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: var(--space-md);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-text {
    font-family: var(--font-display);
    font-size: 0.75rem;
    color: var(--color-text-dim);
}

/* ============================================
   SCROLL INDICATOR
   ============================================ */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-text-dim);
    font-family: var(--font-display);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% {
        transform: translateY(0);
        opacity: 1;
    }
    50% {
        transform: translateY(12px);
        opacity: 0.5;
    }
}

/* ============================================
   UTILITIES
   ============================================ */
.text-accent {
    color: var(--color-accent);
}

.mb-lg {
    margin-bottom: var(--space-lg);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    :root {
        --section-padding: 4rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   CUSTOM SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}

/* ============================================
   HERO PARTICLE CANVAS
   ============================================ */
#hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.scroll-indicator {
    position: relative;
    z-index: 2;
}