/* -------------------------------------------------------------
   SYSTEM DESIGN TOKENS (CSS VARIABLES)
   ------------------------------------------------------------- */
:root {
    --bg-dark: #070a13;
    --bg-card: rgba(13, 20, 35, 0.45);
    --bg-card-hover: rgba(20, 30, 55, 0.6);
    --border-color: rgba(0, 242, 254, 0.15);
    --border-hover: rgba(0, 242, 254, 0.4);
    
    /* Neon Colors */
    --color-cyan: #00f2fe;
    --color-purple: #8a2be2;
    --color-blue: #4facfe;
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Fira Code', monospace;
    
    --transition-smooth: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* -------------------------------------------------------------
   RESET & GLOBAL BASICS
   ------------------------------------------------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: rgba(0, 242, 254, 0.2);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-cyan);
}

/* -------------------------------------------------------------
   BACKGROUND CANVAS & MOUSE GLOW
   ------------------------------------------------------------- */
#neural-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
    pointer-events: none;
    background: radial-gradient(circle at 50% 50%, #0c1225 0%, #070a13 100%);
}

#cursor-glow {
    position: fixed;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.08) 0%, rgba(138, 43, 226, 0.05) 50%, transparent 100%);
    border-radius: 50%;
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: -1;
    transition: width 0.2s, height 0.2s;
    mix-blend-mode: screen;
}

/* -------------------------------------------------------------
   REUSABLE UTILITIES & LAYOUTS
   ------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 8rem 0;
    position: relative;
}

.section-title {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.title-number {
    color: var(--color-cyan);
    font-size: 1.2rem;
}

.section-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    margin-top: -2rem;
    margin-bottom: 3rem;
}

.highlight-gradient {
    background: linear-gradient(135deg, var(--color-cyan) 0%, var(--color-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.8rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.btn-primary {
    background: transparent;
    color: var(--color-cyan);
    border: 1px solid var(--color-cyan);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.1);
}

.btn-primary:hover {
    background: rgba(0, 242, 254, 0.1);
    box-shadow: 0 0 25px rgba(0, 242, 254, 0.3);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-left: 1rem;
}

.btn-secondary:hover {
    color: var(--color-text-primary);
    border-color: var(--color-text-primary);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    transition: var(--transition-smooth);
}

.glass-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 242, 254, 0.05);
}

/* -------------------------------------------------------------
   NAVBAR
   ------------------------------------------------------------- */
.navbar-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(7, 10, 19, 0.7);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
}

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

.logo-text {
    color: var(--color-text-primary);
    margin: 0 3px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

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

.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    cursor: pointer;
}

.nav-mobile-toggle span {
    width: 100%;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition-smooth);
}

/* -------------------------------------------------------------
   HERO SECTION
   ------------------------------------------------------------- */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 100px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 242, 254, 0.05);
    border: 1px solid rgba(0, 242, 254, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-cyan);
    margin-bottom: 2rem;
}

.tag-pulse {
    width: 8px;
    height: 8px;
    background: var(--color-cyan);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--color-cyan);
    animation: pulse-glow 2s infinite;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1.8rem;
    color: var(--color-text-secondary);
    font-weight: 400;
    margin-bottom: 2rem;
}

.typing-cursor {
    color: var(--color-cyan);
    animation: blink 1s infinite;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin-bottom: 3rem;
}

.hero-actions {
    display: flex;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--color-text-muted);
}

.mouse-icon {
    width: 24px;
    height: 38px;
    border: 2px solid var(--color-text-muted);
    border-radius: 12px;
    position: relative;
}

.mouse-wheel {
    width: 4px;
    height: 8px;
    background: var(--color-cyan);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-wheel-anim 1.6s infinite;
}

.scroll-text {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 1px;
}

/* -------------------------------------------------------------
   ABOUT SECTION
   ------------------------------------------------------------- */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.about-quote {
    border-left: 2px solid var(--color-cyan);
    padding-left: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    color: var(--color-text-primary);
    font-size: 1.05rem;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.stat-card:hover {
    border-color: var(--color-cyan);
    transform: translateX(5px);
}

.stat-number {
    display: block;
    font-family: var(--font-mono);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-cyan);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* -------------------------------------------------------------
   TECH STACK & SKILLS
   ------------------------------------------------------------- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skills-category-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.skills-category-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(138, 43, 226, 0.05);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 0.75rem;
}

.category-icon {
    font-size: 1.5rem;
}

.category-header h3 {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--color-text-primary);
}

.skills-list {
    list-style: none;
}

.skills-list li {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.75rem;
    position: relative;
    padding-left: 15px;
}

.skills-list li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--color-cyan);
    font-weight: bold;
}

/* -------------------------------------------------------------
   TIMELINE / EXPERIENCE
   ------------------------------------------------------------- */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, var(--color-cyan) 0%, var(--color-purple) 100%);
    opacity: 0.3;
}

.timeline-item {
    position: relative;
    margin-bottom: 4rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -29px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--bg-dark);
    border: 3px solid var(--color-cyan);
    box-shadow: 0 0 8px var(--color-cyan);
    transition: var(--transition-smooth);
}

.timeline-item:hover .timeline-marker {
    background: var(--color-cyan);
    transform: scale(1.2);
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2.2rem;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.timeline-content:hover {
    border-color: var(--border-hover);
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-cyan);
    display: block;
    margin-bottom: 0.5rem;
}

.timeline-role {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.company-name {
    color: var(--color-cyan);
}

.timeline-location {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-muted);
    display: block;
    margin-bottom: 1.5rem;
}

.timeline-details {
    padding-left: 1.2rem;
}

.timeline-details li {
    color: var(--color-text-secondary);
    margin-bottom: 0.8rem;
    font-size: 0.95rem;
}

.timeline-details li:last-child {
    margin-bottom: 0;
}

/* -------------------------------------------------------------
   EDUCATION & CERTIFICATES
   ------------------------------------------------------------- */
.edu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

.edu-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.edu-card:hover {
    border-color: var(--color-purple);
    transform: translateY(-5px);
}

.edu-card-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    background: rgba(138, 43, 226, 0.15);
    border: 1px solid rgba(138, 43, 226, 0.3);
    color: #c084fc;
    padding: 3px 8px;
    border-radius: 4px;
    text-transform: uppercase;
}

.edu-card-badge.text-gold {
    background: rgba(250, 204, 21, 0.1);
    border-color: rgba(250, 204, 21, 0.3);
    color: #facc15;
}

.edu-card h3 {
    font-size: 1.15rem;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-primary);
}

.edu-institution {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

.edu-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* -------------------------------------------------------------
   CONTACT SECTION
   ------------------------------------------------------------- */
.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

.contact-info p {
    color: var(--color-text-secondary);
    margin-bottom: 3rem;
}

.contact-channels {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.channel-card {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.2rem;
    text-decoration: none;
    color: inherit;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.channel-card:hover {
    border-color: var(--color-cyan);
    transform: translateX(5px);
}

.channel-icon {
    font-size: 1.6rem;
}

.channel-details {
    display: flex;
    flex-direction: column;
}

.channel-title {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.channel-value {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--color-text-primary);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    color: var(--color-text-secondary);
    transition: var(--transition-smooth);
    background: var(--bg-card);
}

.social-btn:hover {
    color: var(--color-cyan);
    border-color: var(--color-cyan);
    transform: translateY(-3px);
}

/* Contact Form */
.contact-form-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2.5rem;
    backdrop-filter: blur(10px);
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.form-group input,
.form-group textarea {
    background: rgba(7, 10, 19, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.9rem;
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-cyan);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.15);
}

/* -------------------------------------------------------------
   FOOTER
   ------------------------------------------------------------- */
.footer {
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    padding: 3rem 0;
    text-align: center;
    background: #04060c;
}

.footer-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
}

.footer p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.footer-subtext {
    font-family: var(--font-mono);
    font-size: 0.75rem !important;
}

/* -------------------------------------------------------------
   KEYFRAMES & ANIMATIONS
   ------------------------------------------------------------- */
@keyframes pulse-glow {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 242, 254, 0.7);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(0, 242, 254, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 242, 254, 0);
    }
}

@keyframes blink {
    50% { opacity: 0; }
}

@keyframes scroll-wheel-anim {
    0% {
        top: 6px;
        opacity: 1;
    }
    50% {
        top: 18px;
        opacity: 0.3;
    }
    100% {
        top: 6px;
        opacity: 1;
    }
}

/* Responsive Styles */
@media (max-width: 968px) {
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-subtitle {
        font-size: 1.4rem;
    }
    
    .nav-links {
        display: none; /* simple hidden state, mobile menu toggle will handle toggle */
    }
    
    .nav-mobile-toggle {
        display: flex;
    }
}