/* ============================================
   DHEER GUPTA - PROFESSIONAL PORTFOLIO
   Modern, Figma-level Design System
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Colors - Light Mode */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --primary-glow: rgba(99, 102, 241, 0.3);

    --accent: #06b6d4;
    --accent-glow: rgba(6, 182, 212, 0.3);

    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: rgba(255, 255, 255, 0.8);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;

    --border: rgba(148, 163, 184, 0.2);
    --border-hover: rgba(99, 102, 241, 0.3);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 40px var(--primary-glow);

    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
    --gradient-bg: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 50%, #f0fdfa 100%);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: rgba(30, 41, 59, 0.8);

    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #64748b;

    --border: rgba(148, 163, 184, 0.1);
    --border-hover: rgba(99, 102, 241, 0.4);

    --gradient-bg: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Background Effects */
.bg-gradient {
    position: fixed;
    inset: 0;
    background: var(--gradient-bg);
    z-index: -2;
    transition: background var(--transition-slow);
}

.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: -1;
    opacity: 0.5;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: all var(--transition-base);
}

[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.8);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    text-decoration: none;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

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

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

.theme-toggle {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    background: var(--primary);
    color: white;
    transform: rotate(15deg);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--space-3xl);
    padding: 8rem var(--space-xl) var(--space-3xl);
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.hero-content {
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.greeting {
    display: block;
    font-size: 0.4em;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.name-highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    min-height: 2.5rem;
}

.typed-text {
    color: var(--primary);
    font-weight: 600;
}

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

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-xl);
    max-width: 540px;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-base);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md), 0 0 20px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px var(--primary-glow);
}

.btn-primary i {
    transition: transform var(--transition-base);
}

.btn-primary:hover i {
    transform: translateX(4px);
}

.btn-outline {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    color: var(--text-primary);
    border-color: var(--border);
}

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

/* Hero Stats */
.hero-stats {
    display: flex;
    gap: var(--space-2xl);
}

.stat {
    text-align: left;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    display: inline;
}

.stat-suffix {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-top: var(--space-xs);
}

/* Hero Visual - Code Window */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.code-window {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    max-width: 500px;
    width: 100%;
}

.window-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.window-dots {
    display: flex;
    gap: var(--space-sm);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.window-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.window-code {
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    overflow-x: auto;
}

.window-code .keyword { color: #c678dd; }
.window-code .class { color: #e5c07b; }
.window-code .function { color: #61afef; }
.window-code .param { color: #e06c75; }
.window-code .comment { color: #5c6370; font-style: italic; }

/* Float Animation */
.animate-float {
    animation: float 6s ease-in-out infinite;
}

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

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-tertiary);
    font-size: 0.8rem;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-tertiary);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--text-tertiary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

/* Animations */
.animate-fade-in {
    animation: fadeIn 0.8s ease forwards;
}

.animate-fade-in-up {
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }
.delay-4 { animation-delay: 0.8s; }

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* ============================================
   SECTION STYLES
   ============================================ */
section {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-tag {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    background: var(--primary-glow);
    color: var(--primary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--text-primary);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
    background: var(--bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--space-3xl);
    align-items: center;
}

.about-lead {
    font-size: 1.25rem;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: var(--space-lg);
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.8;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.highlight-item:hover {
    border-color: var(--primary);
    transform: translateX(8px);
}

.highlight-item i {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-md);
    font-size: 1rem;
}

.highlight-item strong {
    display: block;
    color: var(--text-primary);
    font-weight: 600;
}

.highlight-item span {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.about-image {
    position: relative;
}

.image-frame {
    position: relative;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.image-frame img {
    width: 100%;
    height: auto;
    display: block;
}

.image-decoration {
    position: absolute;
    inset: -20px;
    border: 3px solid var(--primary);
    border-radius: var(--radius-2xl);
    z-index: -1;
    opacity: 0.3;
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */
.experience {
    padding-bottom: var(--space-3xl);
}

.experience-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-2xl);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    transition: all var(--transition-base);
}

.experience-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
}

.experience-card.featured {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-lg);
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.card-icon.startup { background: linear-gradient(135deg, #f97316, #ef4444); }
.card-icon.research { background: linear-gradient(135deg, #6366f1, #8b5cf6); }
.card-icon.collaboration { background: linear-gradient(135deg, #06b6d4, #3b82f6); }
.card-icon.contract { background: linear-gradient(135deg, #10b981, #06b6d4); }
.card-icon.support { background: linear-gradient(135deg, #64748b, #475569); }

.card-meta {
    text-align: right;
}

.card-type {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-date {
    display: block;
    margin-top: var(--space-sm);
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.card-company {
    font-size: 1.125rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.card-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.card-consortium {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    font-style: italic;
    margin-bottom: var(--space-lg);
}

.card-problem, .card-solution {
    margin: var(--space-lg) 0;
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--border);
}

.card-problem {
    border-left-color: var(--warning);
}

.card-solution {
    border-left-color: var(--success);
}

.card-problem h4, .card-solution h4 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.card-problem h4 { color: var(--warning); }
.card-solution h4 { color: var(--success); }

.card-problem p, .card-solution p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Card Details (Expandable) */
.card-details {
    display: none;
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border);
    animation: slideDown 0.3s ease;
}

.card-details.active {
    display: block;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card-details h4 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
}

.card-details h4 i {
    color: var(--primary);
}

/* Tech Stack Grid */
.tech-stack {
    margin-bottom: var(--space-xl);
}

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

.tech-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.tech-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.tech-value {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-align: right;
}

/* Outcomes */
.outcomes {
    margin-bottom: var(--space-xl);
}

.outcomes ul {
    list-style: none;
    padding: 0;
}

.outcomes li {
    position: relative;
    padding-left: var(--space-xl);
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
    line-height: 1.7;
}

.outcomes li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
}

.outcomes li strong {
    color: var(--text-primary);
}

.outcomes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.outcome-category h5 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--space-md);
}

/* Metrics Grid */
.metrics {
    margin-bottom: var(--space-xl);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-md);
}

.metric-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    transition: all var(--transition-base);
}

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

.metric-card.highlight {
    background: var(--gradient-primary);
    border: none;
}

.metric-card.highlight .metric-value,
.metric-card.highlight .metric-label,
.metric-card.highlight .metric-detail {
    color: white;
}

.metric-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    display: block;
}

.metric-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: var(--space-xs);
    display: block;
}

.metric-detail {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: var(--space-sm);
    display: block;
}

/* Classification Table */
.classification-table {
    margin-bottom: var(--space-xl);
    overflow-x: auto;
}

.classification-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.classification-table th,
.classification-table td {
    padding: var(--space-md) var(--space-lg);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.classification-table th {
    background: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.classification-table td {
    color: var(--text-secondary);
}

.classification-table td.highlight {
    color: var(--primary);
    font-weight: 700;
}

/* Urgency System */
.urgency-system {
    margin-bottom: var(--space-xl);
}

.urgency-factors {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.factor {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.factor-weight {
    font-weight: 700;
    color: var(--primary);
}

.factor-name {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.urgency-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xl);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Quality Scoring */
.quality-scoring {
    margin-bottom: var(--space-xl);
}

.scoring-factors {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.score-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.score-points {
    font-weight: 700;
    color: var(--success);
}

.score-factor {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.score-threshold {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* AI Relevance Grid */
.ai-relevance {
    margin-bottom: var(--space-xl);
}

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

.relevance-item {
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.relevance-task {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.relevance-impact {
    display: block;
    font-size: 0.875rem;
    color: var(--primary);
}

/* Responsibilities */
.responsibilities ul {
    list-style: none;
    padding: 0;
}

.responsibilities li {
    position: relative;
    padding-left: var(--space-xl);
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
    line-height: 1.7;
}

.responsibilities li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
}

.responsibilities li strong {
    color: var(--text-primary);
}

/* Skills Gained */
.skills-gained {
    margin-top: var(--space-xl);
}

.skills-gained .skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.skill-item {
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Card Toggle Button */
.card-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-weight: 600;
    color: var(--primary);
    transition: all var(--transition-base);
    margin-top: var(--space-lg);
}

.card-toggle:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.card-toggle i {
    transition: transform var(--transition-base);
}

.card-toggle.active i {
    transform: rotate(180deg);
}

/* Card Tags */
.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
}

.tag {
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills {
    background: var(--bg-secondary);
}

.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.skill-category {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.skill-category:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.category-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.category-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.category-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.skill-category .skill-list {
    list-style: none;
    padding: 0;
}

.skill-category .skill-list li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.skill-category .skill-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
}

/* Tools Grid */
.tech-tools {
    margin-bottom: var(--space-3xl);
}

.tech-tools h3 {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-xl);
}

.tools-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
}

.tool-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    min-width: 100px;
    transition: all var(--transition-base);
}

.tool-item:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.tool-item i {
    font-size: 2rem;
    color: var(--primary);
}

.tool-item span {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Certifications */
.certifications h3 {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-xl);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
}

.cert-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.cert-item:hover {
    border-color: var(--primary);
    transform: translateX(8px);
}

.cert-item i {
    font-size: 1.5rem;
    color: var(--primary);
}

.cert-item strong {
    display: block;
    color: var(--text-primary);
    font-weight: 600;
}

.cert-item span {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
    padding-bottom: var(--space-3xl);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.contact-intro {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-xl);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.contact-method:hover {
    border-color: var(--primary);
    transform: translateX(8px);
}

.contact-method i {
    font-size: 1.25rem;
    color: var(--primary);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-2xl);
    padding: var(--space-xl);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-group input,
.form-group textarea {
    padding: var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

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

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

.btn-submit {
    width: 100%;
    justify-content: center;
}

#form-result {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 500;
    display: none;
}

#form-result.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

#form-result.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

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

/* ============================================
   PROJECTS SECTION
   ============================================ */
.projects {
    padding: var(--space-3xl) 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-xl);
}

.project-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.project-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    margin-bottom: var(--space-lg);
}

.project-icon.cybersecurity {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
}

.project-icon.data-science {
    background: linear-gradient(135deg, #06b6d4, #3b82f6);
}

.project-icon.data-engineering {
    background: linear-gradient(135deg, #10b981, #06b6d4);
}

.project-icon.graphics {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
}

.project-icon.backend {
    background: linear-gradient(135deg, #64748b, #475569);
}

.project-icon.game {
    background: linear-gradient(135deg, #ec4899, #8b5cf6);
}

.project-icon.functional {
    background: linear-gradient(135deg, #8b5cf6, #6366f1);
}

.project-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.project-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.project-features {
    margin-bottom: var(--space-lg);
    flex: 1;
}

.project-features ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.project-features li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

.project-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all var(--transition-base);
    margin-top: auto;
    width: fit-content;
}

.project-link:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.project-link i {
    font-size: 1rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-secondary);
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--border);
}

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

.footer-content p {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    gap: var(--space-md);
}

.footer-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-base);
}

.footer-links a:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Fix horizontal overflow globally */
html, body {
    overflow-x: hidden;
    max-width: 100vw;
}

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-2xl);
    }

    .hero-content {
        order: 1;
    }

    .hero-visual {
        order: 0;
        display: none; /* Hide code window on tablet/mobile */
    }

    .hero-description {
        max-width: 100%;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .about-image {
        order: -1;
        max-width: 300px;
        margin: 0 auto;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .scroll-indicator {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--space-xl);
        gap: var(--space-md);
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-base);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding: 6rem var(--space-md) var(--space-2xl);
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--space-lg);
        align-items: center;
    }

    .stat {
        text-align: center;
    }

    .stat-number {
        font-size: 1.75rem;
    }

    .hero-badge {
        font-size: 0.8rem;
        padding: var(--space-xs) var(--space-md);
    }

    .section-title {
        font-size: 1.75rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .project-card {
        padding: var(--space-lg);
    }

    .project-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }

    .project-title {
        font-size: 1.1rem;
    }

    .project-description {
        font-size: 0.9rem;
    }

    .project-features li {
        font-size: 0.85rem;
    }

    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tech-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }

    .experience-card {
        padding: var(--space-lg);
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }

    .card-meta {
        text-align: left;
    }

    .card-title {
        font-size: 1.25rem;
    }

    .outcomes-grid {
        grid-template-columns: 1fr;
    }

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

    .tools-grid {
        gap: var(--space-sm);
    }

    .tool-item {
        padding: var(--space-md);
        min-width: 80px;
    }

    .tool-item i {
        font-size: 1.5rem;
    }

    .tool-item span {
        font-size: 0.75rem;
    }

    .cert-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }

    .nav-container {
        padding: 0 var(--space-md);
    }

    .hero {
        padding: 5rem var(--space-md) var(--space-xl);
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .greeting {
        font-size: 0.5em;
    }

    .hero-subtitle {
        font-size: 1rem;
        min-height: 2rem;
    }

    .hero-description {
        font-size: 0.95rem;
        line-height: 1.7;
    }

    .hero-cta {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .btn {
        width: 100%;
        justify-content: center;
        padding: var(--space-md) var(--space-lg);
    }

    .hero-stats {
        gap: var(--space-md);
        margin-top: var(--space-lg);
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }

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

    .section-tag {
        font-size: 0.75rem;
        padding: var(--space-xs) var(--space-md);
    }

    .section-title {
        font-size: 1.5rem;
    }

    .about-lead {
        font-size: 1.1rem;
    }

    .about-content p {
        font-size: 0.95rem;
    }

    .highlight-item {
        padding: var(--space-sm);
    }

    .highlight-item i {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    .highlight-item strong {
        font-size: 0.9rem;
    }

    .highlight-item span {
        font-size: 0.8rem;
    }

    .experience-card {
        padding: var(--space-md);
        margin-bottom: var(--space-lg);
    }

    .card-icon {
        width: 44px;
        height: 44px;
        font-size: 1.25rem;
    }

    .card-title {
        font-size: 1.1rem;
    }

    .card-company {
        font-size: 1rem;
    }

    .card-subtitle {
        font-size: 0.9rem;
    }

    .card-problem, .card-solution {
        padding: var(--space-md);
        margin: var(--space-md) 0;
    }

    .card-problem h4, .card-solution h4 {
        font-size: 0.9rem;
    }

    .card-problem p, .card-solution p {
        font-size: 0.9rem;
    }

    .card-toggle {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.9rem;
    }

    .card-tags {
        gap: var(--space-xs);
    }

    .tag {
        font-size: 0.7rem;
        padding: var(--space-xs) var(--space-sm);
    }

    .metrics-grid {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }

    .metric-card {
        padding: var(--space-md);
    }

    .metric-value {
        font-size: 1.5rem;
    }

    .metric-label {
        font-size: 0.8rem;
    }

    .metric-detail {
        font-size: 0.7rem;
    }

    .tech-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }

    .tech-value {
        text-align: left;
    }

    .urgency-factors,
    .scoring-factors {
        flex-direction: column;
    }

    .factor, .score-item {
        width: 100%;
    }

    .classification-table th,
    .classification-table td {
        padding: var(--space-sm);
        font-size: 0.8rem;
    }

    .skill-category {
        padding: var(--space-lg);
    }

    .category-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .category-header h3 {
        font-size: 1.1rem;
    }

    .skill-category .skill-list li {
        font-size: 0.85rem;
    }

    .tech-tools h3,
    .certifications h3 {
        font-size: 1.25rem;
    }

    .contact-intro {
        font-size: 1rem;
    }

    .contact-method {
        padding: var(--space-md);
    }

    .contact-method i {
        font-size: 1rem;
    }

    .contact-method span {
        font-size: 0.9rem;
    }

    .contact-form-wrapper {
        padding: var(--space-lg);
    }

    .form-group label {
        font-size: 0.8rem;
    }

    .form-group input,
    .form-group textarea {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.95rem;
    }

    .footer-content p {
        font-size: 0.8rem;
    }

    .footer-links a {
        width: 36px;
        height: 36px;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}