/*=========================================
   CSS Custom Properties (Variables)
=========================================*/
:root {
    /* Colors - Deep Slate Dark Mode */
    --bg-main: #0B1120;
    --bg-secondary: #0F172A;
    --text-main: #F8FAFC;
    --text-muted: #94A3B8;
    
    /* Accents - Data Vis Inspired */
    --accent: #06B6D4; /* Vibrant Cyan */
    --accent-hover: #0891B2;
    --accent-glow: rgba(6, 182, 212, 0.4);
    
    --chart-red: #EF4444;
    --chart-yellow: #F59E0B;
    --chart-green: #10B981;
    --chart-purple: #8B5CF6;
    
    /* Layout */
    --border-radius: 12px;
    --glass-bg: rgba(30, 41, 59, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    
    /* Transitions */
    --transition-fast: 0.2s ease-in-out;
    --transition-med: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

a {
    text-decoration: none;
    color: var(--text-main);
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

/* Typography elements */
.text-accent {
    color: var(--accent);
}

h1, h2, h3, h4 {
    line-height: 1.2;
    font-weight: 700;
}

p {
    color: var(--text-muted);
}

/* Utility Classes */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.mono-subtitle {
    font-family: monospace;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.85rem;
    display: block;
    margin-bottom: 0.5rem;
}

.section-title {
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
}

.w-100 {
    width: 100%;
}

.mt-4 {
    margin-top: 1rem;
}

/* Background Effects */
.bg-gradient-1, .bg-gradient-2 {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -2;
    opacity: 0.4;
    pointer-events: none;
}

.bg-gradient-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    top: -200px;
    left: -100px;
}

.bg-gradient-2 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--chart-purple) 0%, transparent 70%);
    bottom: -300px;
    right: -200px;
}

.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--glass-border) 1px, transparent 1px),
        linear-gradient(90deg, var(--glass-border) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.2;
    z-index: -1;
    pointer-events: none;
}

/*=========================================
   Buttons
=========================================*/
.btn-primary, .btn-secondary, .btn-primary-outline {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    border: none;
    font-family: inherit;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--accent);
    color: #fff;
    box-shadow: 0 0 15px -5px var(--accent-glow);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    box-shadow: 0 0 25px 0 var(--accent-glow);
    transform: translateY(-2px);
    color: #fff;
}

.btn-secondary {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

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

.btn-primary-outline {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
}

.btn-primary-outline:hover {
    background: var(--accent);
    color: #fff;
}

.btn-text {
    color: var(--accent);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-text:hover {
    gap: 0.75rem;
}

/*=========================================
   Header & Navigation
=========================================*/
header {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 0;
    z-index: 100;
    transition: all var(--transition-fast);
}

header.scrolled {
    background-color: rgba(11, 17, 32, 0.85);
    backdrop-filter: blur(12px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

nav ul {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links li a {
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-links li a:not(.btn-primary-outline):hover {
    color: var(--accent);
}

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/*=========================================
   Hero Section
=========================================*/
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 5rem; /* Account for fixed header */
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.hero-text {
    flex: 1;
}

.hero-text .subtitle {
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 1rem;
}

.hero-text .title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1.5rem;
}

.hero-text .description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Glass Card & Mini Chart */
.glass-card, .glass-panel {
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    backdrop-filter: blur(16px);
}

.main-chart-card {
    width: 100%;
    max-width: 400px;
    padding: 1.5rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: transform var(--transition-med);
}

.main-chart-card:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg) translateY(-10px);
}

.chart-header {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.dot.red { background-color: var(--chart-red); }
.dot.yellow { background-color: var(--chart-yellow); }
.dot.green { background-color: var(--chart-green); }

.bar-chart {
    height: 150px;
    display: flex;
    align-items: flex-end;
    gap: 10px;
    position: relative;
}

.bar {
    flex: 1;
    background: linear-gradient(to top, var(--accent-hover), var(--accent));
    border-radius: 4px 4px 0 0;
    position: relative;
    transition: height 1s ease-out;
}

.bar:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-main);
    color: #fff;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
    border: 1px solid var(--glass-border);
}

.chart-stats {
    display: flex;
    justify-content: space-between;
}

.stat-label {
    font-size: 0.85rem;
}
.stat-val {
    font-size: 1.2rem;
    font-weight: 700;
}

/*=========================================
   Stats Banner
=========================================*/
.stats-banner {
    padding: 3rem 0;
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
    background-color: rgba(15, 23, 42, 0.4);
}

.stats-wrapper {
    display: flex;
    justify-content: space-around;
    text-align: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.stat-item h3 {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 0.25rem;
}

/*=========================================
   Experience & Education
=========================================*/
.resume-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
}

.resume-block {
    margin-bottom: 2.5rem;
    position: relative;
    padding-left: 2rem;
    border-left: 2px solid var(--glass-border);
    margin-left: 0.8rem;
}

.resume-block::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: var(--bg-main);
    border: 2px solid var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

.resume-block:last-child {
    margin-bottom: 0;
}

.resume-block h4 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
    color: var(--text-main);
}

.resume-meta {
    font-size: 0.9rem;
    color: var(--accent);
    margin-bottom: 1rem;
    font-weight: 500;
}

/*=========================================
   Skills Section
=========================================*/
.skills-section {
    padding: 6rem 0;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-category {
    padding: 2rem;
}

.category-icon {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    background-color: rgba(6, 182, 212, 0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.skill-category h3 {
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

.skill-list li {
    margin-bottom: 1rem;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.skill-info span:last-child {
    color: var(--accent);
}

.skill-bar {
    height: 6px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-hover), var(--accent));
    border-radius: 3px;
    width: 0; /* Animated via JS */
    transition: width 1.5s cubic-bezier(0.1, 0.5, 0.2, 1);
}

/* Tags Layout */
.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

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

/*=========================================
   Projects / Case Studies
=========================================*/
.projects-section {
    padding: 6rem 0;
}

.project-timeline {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.project-card {
    display: flex;
    gap: 3rem;
    padding: 3rem;
    align-items: center;
}

.project-card.reverse {
    flex-direction: row-reverse;
}

.project-content {
    flex: 1;
    position: relative;
    z-index: 1;
}

.project-meta {
    margin-bottom: 1rem;
    display: flex;
    gap: 0.5rem;
}

.tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background-color: rgba(6, 182, 212, 0.1);
    color: var(--accent);
    border-radius: 4px;
}

.project-content h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.project-content p {
    margin-bottom: 1.5rem;
}

.project-highlights {
    margin-bottom: 2rem;
}

.project-highlights li {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.project-highlights li i {
    margin-top: 0.25rem;
}

.project-number {
    font-family: inherit;
    font-size: 6rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.15);
    line-height: 1;
    margin-bottom: 0.5rem;
    letter-spacing: -2px;
}

.project-tech {
    margin-bottom: 2rem;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.project-tech strong {
    color: var(--accent);
    font-weight: 600;
}

.project-visual {
    flex: 1;
    min-width: 300px;
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    aspect-ratio: 4/3;
    border: 1px solid var(--glass-border);
}

.project-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card:hover .project-image {
    transform: scale(1.05);
}

.mockup-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    box-shadow: inset 0 0 50px rgba(0,0,0,0.5);
}

.project-card:hover .mockup-placeholder {
    color: var(--accent-glow);
    border-color: rgba(6, 182, 212, 0.3);
}


/*=========================================
   Contact & Footer
=========================================*/
.contact-section {
    padding: 6rem 0;
}

.contact-card {
    display: flex;
    gap: 4rem;
    padding: 4rem;
}

.contact-info {
    flex: 1;
}

.contact-info h2 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.contact-info p {
    margin-bottom: 2rem;
}

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

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-method .icon-box {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.contact-form {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
}

.form-group input, .form-group textarea {
    padding: 1rem;
    background-color: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-main);
    font-family: inherit;
    transition: border-color var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

footer {
    padding: 2rem 0;
    border-top: 1px solid var(--glass-border);
    margin-top: 2rem;
}

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

.footer-content .brand {
    font-weight: 700;
    font-size: 1.25rem;
}

.copyright {
    font-size: 0.9rem;
}

/*=========================================
   Animations
=========================================*/
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }
.delay-3 { transition-delay: 0.6s; }


/*=========================================
   Media Queries (Responsive)
=========================================*/
@media (max-width: 992px) {
    .hero-content, .contact-card {
        flex-direction: column;
        padding: 2rem;
    }
    .project-card, .project-card.reverse {
        flex-direction: column;
        padding: 2rem;
    }
    .hero-text {
        text-align: center;
    }
    .hero-actions {
        justify-content: center;
    }
    .section-title, .contact-info {
        text-align: center;
    }
    .contact-methods {
        align-items: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-main);
        padding: 2rem 0;
        border-bottom: 1px solid var(--glass-border);
    }
    .nav-links.active {
        display: flex;
    }
    .mobile-menu-toggle {
        display: block;
    }
    .hero-text .title {
        font-size: 2.2rem;
    }
    .project-content h3 {
        font-size: 1.5rem;
    }
    .stats-wrapper {
        flex-direction: column;
    }
}