/* ==========================================
   DESIGN TOKENS & CSS CUSTOM PROPERTIES
   ========================================== */
:root {
    /* Colors - Professional Light Theme (Inverted) */
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-tertiary: #e2e8f0;
    --bg-card: rgba(255, 255, 255, 0.8);

    /* Accent Colors - Professional & Subtle */
    --accent-primary: #1e293b;
    --accent-secondary: #475569;
    --accent-highlight: #0f172a;

    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;

    /* Professional Accent */
    --accent-cyan: #475569;
    --accent-purple: #52525b;
    --accent-pink: #334155;
    --accent-blue: #1e293b;

    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(0, 0, 0, 0.08);
    --glass-shadow: rgba(0, 0, 0, 0.1);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    --font-size-7xl: 4.5rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* 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: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-smooth: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

/* Respect user's reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

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

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

ul,
ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.highlight {
    color: var(--accent-primary);
    font-weight: 600;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 32px var(--glass-shadow);
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

/* Only apply hover transforms on devices that support hover (non-touch) */
@media (hover: hover) and (pointer: fine) {
    .glass-card:hover {
        transform: translateY(-6px) scale(1.02);
        box-shadow: 0 20px 48px rgba(0, 0, 0, 0.12);
        border-color: rgba(0, 0, 0, 0.15);
    }
}

.project-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-1);
}

/* ==========================================
   NAVIGATION
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-4) 0;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: 1px solid transparent;
    box-shadow: none;
    transition: background-color var(--transition-base), border-bottom var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
}

.nav-logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    justify-self: start;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    justify-self: center;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    justify-self: end;
}

.mobile-only {
    display: none;
}

.desktop-only {
    display: flex;
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: var(--space-2) 0;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--text-primary);
    transition: width var(--transition-base);
}

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

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

.nav-cta {
    background: var(--text-primary);
    color: var(--bg-primary) !important;
    padding: var(--space-2) var(--space-5) !important;
    border-radius: var(--radius-full);
    font-weight: 600;
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.2);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
}

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

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: var(--space-20) var(--space-6);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 0, 0, 0.03), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(0, 0, 0, 0.02), transparent),
        radial-gradient(ellipse 50% 30% at 20% 80%, rgba(0, 0, 0, 0.015), transparent);
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(2px 2px at 20px 30px, rgba(0, 0, 0, 0.25), transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(0, 0, 0, 0.2), transparent),
        radial-gradient(1px 1px at 90px 40px, rgba(0, 0, 0, 0.3), transparent),
        radial-gradient(2px 2px at 130px 80px, rgba(0, 0, 0, 0.15), transparent),
        radial-gradient(1px 1px at 160px 120px, rgba(0, 0, 0, 0.22), transparent);
    background-size: 200px 200px;
    animation: float 20s linear infinite;
    will-change: transform;
}

@keyframes float {
    0% {
        transform: translateY(0);
    }

    100% {
        transform: translateY(-200px);
    }
}

.hero-content {
    text-align: center;
    max-width: 900px;
}

.hero-greeting {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: var(--space-4);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.hero-name {
    font-size: clamp(2.5rem, 10vw, var(--font-size-7xl));
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: clamp(var(--font-size-lg), 3vw, var(--font-size-xl));
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--space-10);
    line-height: 1.7;
}

.hero-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    justify-content: center;
    margin-bottom: var(--space-10);
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

/* GitHub Button - Black */
.hero-btn.github-btn {
    background: #0f172a;
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.3);
}

.hero-btn.github-btn:hover {
    background: #1e293b;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(15, 23, 42, 0.4);
}

/* LinkedIn Button - Gray */
.hero-btn.linkedin-btn {
    background: #6b7280;
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(107, 114, 128, 0.3);
}

.hero-btn.linkedin-btn:hover {
    background: #4b5563;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(107, 114, 128, 0.4);
}

.hero-btn.primary {
    background: var(--text-primary);
    color: var(--bg-primary);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.15);
}

.hero-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.25);
}

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

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

.hero-social {
    display: flex;
    gap: var(--space-6);
    justify-content: center;
    margin-bottom: var(--space-16);
}

.hero-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.hero-social a:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.hero-scroll {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
}

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

.scroll-indicator::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: var(--radius-full);
    animation: scroll 1.5s ease-in-out infinite;
}

@keyframes scroll {

    0%,
    100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }

    50% {
        opacity: 0.5;
        transform: translateX(-50%) translateY(10px);
    }
}

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

.animate-slide-up {
    animation: slideUp 0.8s ease forwards;
}

.animate-fade-in-delayed {
    animation: fadeIn 0.8s ease 0.3s forwards;
    opacity: 0;
}

.animate-fade-in-delayed-2 {
    animation: fadeIn 0.8s ease 0.6s forwards;
    opacity: 0;
}

.animate-fade-in-delayed-3 {
    animation: fadeIn 0.8s ease 0.9s forwards;
    opacity: 0;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Animations */
.scroll-animate {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-animate.in-view {
    opacity: 1;
    transform: translateY(0);
    /* Remove will-change after animation to save memory, though simpler to leave it or use JS to remove. 
       For now, we keep it simple or remove it if we could via JS. But CSS only here. */
}

/* ==========================================
   SECTIONS
   ========================================== */
.section {
    padding: var(--space-24) 0;
    position: relative;
    content-visibility: auto;
    contain-intrinsic-size: 800px;
    /* Estimate height to prevent scrollbar jumping */
}

/* Subtle gradient border at top of each section */
.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.1), transparent);
}

.section-title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-4xl));
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-16);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--text-secondary);
    border-radius: var(--radius-full);
    margin: var(--space-4) auto 0;
}

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

.about-content {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: var(--space-8);
    align-items: center;
}

.about-details {
    text-align: left;
    order: 2;
}

.about-text p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    line-height: 1.7;
}

.about-intro {
    font-size: var(--font-size-xl);
    font-weight: 500;
    margin-bottom: var(--space-6);
    color: var(--text-primary);
    line-height: 1.5;
}

.about-stats {
    display: flex;
    justify-content: flex-start;
    gap: var(--space-12);
    margin-top: var(--space-10);
    flex-wrap: wrap;
}

.about-visual {
    display: flex;
    justify-content: center;
    position: relative;
    order: 1;
}

.about-image-wrapper {
    position: relative;
    width: 320px;
    height: 400px;
    border-radius: var(--radius-2xl);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-base);
}

.about-image-wrapper:hover {
    transform: translateY(-5px);
}

.about-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    color: var(--text-tertiary);
    position: relative;
    z-index: 1;
}

.about-decoration {
    position: absolute;
    inset: 10px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-xl);
    z-index: 2;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--text-primary);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ==========================================
   EDUCATION SECTION
   ========================================== */
.education {
    background: var(--bg-primary);
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--text-secondary), var(--text-tertiary));
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    padding-bottom: var(--space-10);
}

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

.timeline-marker {
    position: absolute;
    left: 12px;
    top: 2rem;
    /* Align with card content top */
    width: 18px;
    height: 18px;
    border-radius: var(--radius-full);
    background: var(--bg-primary);
    border: 3px solid var(--text-secondary);
    box-shadow: 0 0 0 4px var(--bg-primary);
    /* Use boxShadow as spacer from line */
    z-index: 1;
    transition: all var(--transition-base);
}

/* Horizontal Connector */
.timeline-marker::after {
    content: '';
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 2px;
    background: var(--text-tertiary);
    z-index: -1;
    transition: width var(--transition-base), background-color var(--transition-base);
}

.timeline-item:hover .timeline-marker {
    background: var(--text-primary);
    border-color: var(--text-primary);
    box-shadow: 0 0 0 6px rgba(0, 0, 0, 0.1);
    transform: scale(1.1);
}

.timeline-item:hover .timeline-marker::after {
    background: var(--text-primary);
}

.timeline-content {
    padding: var(--space-6);
    position: relative;
    /* Ensure absolute positioning works relative to this */
}

.education-logo {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    padding: 4px;
    /* Add some padding for the logo */
    overflow: hidden;
}

.education-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.timeline-date {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
    /* Make date more subtle */
    font-weight: 500;
}

.timeline-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-1);
}

.timeline-content h4 {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.institution {
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-3);
}

.education-detail {
    margin-top: var(--space-3);
}

.badge {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

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

.experience-grid {
    max-width: 600px;
    margin: 0 auto;
}

.experience-card {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

.experience-card:hover {
    border-color: rgba(0, 0, 0, 0.15);
}

.experience-card:hover .experience-arrow {
    color: var(--accent-cyan);
}

.experience-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

.experience-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.experience-company {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--space-3);
}

.experience-summary {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    margin-bottom: var(--space-5);
}

.experience-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-4);
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.experience-date {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.experience-arrow {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.experience-list {
    padding-left: var(--space-5);
}

.experience-list li {
    position: relative;
    padding-left: var(--space-4);
    margin-bottom: var(--space-3);
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.7;
}

.experience-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--accent-cyan);
}

/* ==========================================
   PROJECTS SECTION
   ========================================== */
.projects {
    background: var(--bg-primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--space-6);
}

.project-card {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

.project-card:hover {
    border-color: rgba(0, 0, 0, 0.15);
}

.project-card:hover .project-arrow {
    color: var(--text-primary);
}

.project-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    background: rgba(0, 0, 0, 0.08);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.project-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-4);
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
}

.tech-tag {
    padding: var(--space-1) var(--space-3);
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--text-secondary);
}

.project-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-4);
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.project-preview {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.project-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.detail-preview {
    width: 100%;
    aspect-ratio: 16 / 9;
    max-height: 500px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-bottom: var(--space-10);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.detail-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-arrow {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.project-features {
    margin-bottom: var(--space-6);
    padding-left: var(--space-4);
    flex-grow: 1;
}

.project-features li {
    position: relative;
    padding-left: var(--space-4);
    margin-bottom: var(--space-2);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

.project-features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--text-secondary);
}

.project-tech {
    display: grid;
    grid-template-columns: repeat(3, max-content);
    gap: var(--space-2);
    margin-top: auto;
}

.tech-tag {
    padding: var(--space-1) var(--space-3);
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--text-secondary);
}

.project-status {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-status.completed {
    background: rgba(0, 0, 0, 0.08);
    color: var(--text-secondary);
    border: 1px solid rgba(0, 0, 0, 0.15);
}

.project-status.in-progress {
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-tertiary);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.project-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
    padding: var(--space-3) var(--space-5);
    background: var(--text-primary);
    color: var(--bg-primary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    transition: all var(--transition-base);
}

.project-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.2);
}

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

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

.skill-category {
    padding: var(--space-6);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
    color: var(--text-secondary);
}

.skill-category-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.skill-tag {
    padding: var(--space-2) var(--space-4);
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.skill-tag:hover {
    background: rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 0, 0, 0.15);
    color: var(--text-primary);
    transform: translateY(-2px);
}

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

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    max-width: 1200px;
    margin: 0 auto;
}

.achievement-card {
    padding: var(--space-8);
    text-align: center;
    position: relative;
}

.achievement-badge {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: var(--space-3);
}

.achievement-badge.winner {
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-secondary);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.achievement-badge.participant {
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-secondary);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.achievement-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-5);
    border-radius: var(--radius-full);
}

/* Winner Achievement - Black trophy */
.achievement-icon.trophy {
    background: rgba(0, 0, 0, 0.08);
    color: #0f172a;
    border: 2px solid rgba(0, 0, 0, 0.15);
}

/* Participant Achievement - Match trophy styling */
.achievement-icon.medal {
    background: rgba(0, 0, 0, 0.08);
    color: #0f172a;
    border: 2px solid rgba(0, 0, 0, 0.15);
}

.achievement-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.achievement-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

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

.contact-intro {
    text-align: center;
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 900px;
    margin: -var(--space-8) auto var(--space-12);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-6);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-card {
    padding: var(--space-8);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
}

.contact-card svg {
    color: var(--accent-cyan);
}

.contact-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.contact-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    word-break: break-word;
}

/* ==========================================
   BEYOND THE CODE SECTION
   ========================================== */
.beyond-code {
    background: var(--bg-secondary);
}

.beyond-content {
    max-width: 1000px;
    margin: 0 auto;
}

.beyond-intro {
    text-align: center;
    margin-bottom: var(--space-12);
}

.beyond-intro p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto;
}

.beyond-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-12);
}

.beyond-card {
    padding: var(--space-8);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.beyond-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--text-tertiary), var(--text-secondary));
    border-radius: var(--radius-full);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.beyond-card:hover::before {
    opacity: 1;
}

.beyond-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-5);
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.03), rgba(0, 0, 0, 0.08));
    color: var(--text-secondary);
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: all var(--transition-base);
}

.beyond-card:hover .beyond-icon {
    transform: scale(1.05);
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.05), rgba(0, 0, 0, 0.1));
}

.beyond-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--space-5);
    color: var(--text-primary);
}

.learning-list {
    text-align: left;
    list-style: none;
    padding: 0;
    margin: 0;
}

.learning-list li {
    padding: var(--space-3) var(--space-4);
    padding-left: var(--space-8);
    position: relative;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    background: rgba(0, 0, 0, 0.02);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2);
    transition: all var(--transition-fast);
}

.learning-list li:last-child {
    margin-bottom: 0;
}

.learning-list li:hover {
    background: rgba(0, 0, 0, 0.04);
    transform: translateX(4px);
}

.learning-list li::before {
    content: "▸";
    position: absolute;
    left: var(--space-4);
    color: var(--text-tertiary);
    font-size: var(--font-size-xs);
}

.interests-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    justify-content: center;
}

.interest-tag {
    padding: var(--space-2) var(--space-4);
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-base);
    cursor: default;
}

.interest-tag:hover {
    background: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--bg-primary);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.philosophy-quote {
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.6;
    padding: var(--space-4) var(--space-2);
    text-align: center;
    margin: 0;
    margin-top: -10px;
    /* Lift text slightly */
    position: relative;
    z-index: 1;
}

.fun-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
    padding: var(--space-8);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.fun-stat {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.fun-stat:hover {
    background: rgba(0, 0, 0, 0.02);
    transform: translateY(-4px);
}

.fun-stat-icon {
    font-size: 2.5rem;
    line-height: 1;
    filter: grayscale(0);
    transition: transform var(--transition-base);
}

.fun-stat:hover .fun-stat-icon {
    transform: scale(1.2) rotate(-5deg);
}

.fun-stat-number {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.fun-stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 500;
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    padding: var(--space-8) 0;
    text-align: center;
    border-top: 1px solid var(--glass-border);
    background: var(--bg-primary);
}

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

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 768px) {
    .nav-container {
        display: flex;
        justify-content: space-between;
    }

    .mobile-only {
        display: block;
    }

    .desktop-only {
        display: none;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: rgba(248, 250, 252, 0.98);
        flex-direction: column;
        padding: var(--space-20) var(--space-8);
        gap: var(--space-6);
        transition: right var(--transition-smooth);
        border-left: 1px solid var(--glass-border);
        box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
        z-index: 1000;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu.active::before {
        content: '';
        position: fixed;
        top: 0;
        left: -100vw;
        width: 100vw;
        height: 100vh;
        background: rgba(0, 0, 0, 0.6);
        z-index: -1;
    }

    .nav-link {
        font-size: var(--font-size-lg);
        padding: var(--space-3) 0;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-links {
        flex-direction: column;
        align-items: center;
    }

    .hero-btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .about-stats {
        gap: var(--space-8);
        justify-content: center;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: var(--space-10);
        text-align: center;
    }

    .about-details {
        text-align: center;
    }

    .about-visual {
        order: -1;
    }

    .about-image-wrapper {
        width: 260px;
        height: 320px;
    }

    .timeline::before {
        left: 10px;
    }

    .timeline-item {
        padding-left: 40px;
    }

    .timeline-marker {
        left: 2px;
    }

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

    .experience-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .experience-meta {
        align-items: flex-start;
        text-align: left;
    }

    /* Mobile Performance Optimizations */
    .glass-card {
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
    }

    .navbar.scrolled {
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
    }

    /* Simplify transitions on mobile for better performance */
    .glass-card,
    .skill-tag,
    .interest-tag,
    .beyond-card,
    .learning-list li {
        transition: none;
    }

    /* Ensure smooth scrolling */
    .section {
        touch-action: pan-y;
    }
}

@media (max-width: 480px) {
    .section {
        padding: var(--space-16) 0;
    }

    .container {
        padding: 0 var(--space-5);
    }

    .modal-content {
        padding: var(--space-5);
        width: 90%;
    }

    .modal-link {
        padding: var(--space-3) var(--space-4);
        font-size: var(--font-size-sm);
    }

    .modal-title {
        font-size: var(--font-size-xl);
    }

    .hero-scroll {
        display: none;
    }

    .stat-number {
        font-size: var(--font-size-3xl);
    }

    .hero-social {
        margin-bottom: var(--space-8);
    }

    .hero-social a {
        width: 44px;
        height: 44px;
    }

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

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

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

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

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

    .fun-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
        padding: var(--space-6);
    }

    .fun-stat {
        padding: var(--space-3);
    }

    .fun-stat-icon {
        font-size: 2rem;
    }

    .fun-stat-number {
        font-size: var(--font-size-xl);
    }

    .timeline-content {
        padding: var(--space-4);
    }

    .experience-card,
    .project-card,
    .achievement-card,
    .contact-card {
        padding: var(--space-6);
    }
}

/* ==========================================
   CONTACT MODAL
   ========================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    position: relative;
    max-width: 480px;
    width: 90%;
    padding: var(--space-10);
    text-align: center;
    transform: translateY(20px) scale(0.95);
    transition: transform var(--transition-base);
}

.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-primary);
    background: rgba(0, 0, 0, 0.05);
}

.modal-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.modal-intro {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
}

.modal-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.modal-link {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-6);
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

.modal-link:hover {
    background: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.15);
    transform: translateX(4px);
}

.modal-link svg {
    flex-shrink: 0;
    color: var(--text-secondary);
}

.modal-link.email-copy {
    cursor: pointer;
    position: relative;
    /* Prevent layout shift from "Copied!" text */
    min-width: max-content;
}

.modal-link .copy-hint {
    margin-left: auto;
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    position: relative;
    transition: color var(--transition-fast);
}

.modal-link.email-copy.copied .copy-hint {
    color: transparent;
}

.modal-link.email-copy.copied .copy-hint::before {
    content: '✓ Copied!';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    color: #16a34a;
    font-size: var(--font-size-xs);
    white-space: nowrap;
}