/* Variables */
:root {
    /* Colors - Professional Dark Theme */
    --color-primary: #00D4FF;
    --color-primary-light: #33DDFF;
    --color-primary-dark: #0099CC;
    --color-accent: #FF6B35;
    --color-accent-light: #FF8A65;
    
    --gradient-primary: linear-gradient(135deg, #00D4FF 0%, #0099CC 100%);
    --gradient-accent: linear-gradient(135deg, #FF6B35 0%, #FF8A65 100%);
    --gradient-surface: linear-gradient(135deg, rgba(15, 23, 42, 0.8) 0%, rgba(30, 41, 59, 0.6) 100%);
    
    --text-color-primary: #F8FAFC;
    --text-color-secondary: #CBD5E1;
    --text-color-muted: #94A3B8;
    
    --surface-primary: #0F172A;
    --surface-secondary: #1E293B;
    --surface-tertiary: #334155;
    --surface-translucent: rgba(15, 23, 42, 0.9);
    --surface-glass: rgba(30, 41, 59, 0.8);
    
    --border-color: rgba(0, 212, 255, 0.3);
    --border-color-subtle: rgba(203, 213, 225, 0.1);
    --border-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-large: 0 10px 25px rgba(0, 0, 0, 0.5);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    
    --text-xs: 0.75rem;     /* 12px */
    --text-sm: 0.875rem;    /* 14px */
    --text-base: 1rem;      /* 16px */
    --text-lg: 1.125rem;    /* 18px */
    --text-xl: 1.25rem;     /* 20px */
    --text-2xl: 1.5rem;     /* 24px */
    --text-3xl: 1.875rem;   /* 30px */
    --text-4xl: 2.25rem;    /* 36px */
    
    --weight-normal: 400;
    --weight-medium: 500;
    --weight-semibold: 600;
    --weight-bold: 700;
    
    /* Spacing */
    --space-1: 0.25rem;     /* 4px */
    --space-2: 0.5rem;      /* 8px */
    --space-3: 0.75rem;     /* 12px */
    --space-4: 1rem;        /* 16px */
    --space-5: 1.25rem;     /* 20px */
    --space-6: 1.5rem;      /* 24px */
    --space-8: 2rem;        /* 32px */
    --space-10: 2.5rem;     /* 40px */
    --space-12: 3rem;       /* 48px */
    --space-16: 4rem;       /* 64px */
    
    /* Layout */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    --sidebar-width: 320px;
    --header-height: 80px;
    --mobile-nav-height: 60px;
    
    /* Transitions */
    --transition-fast: 150ms ease-out;
    --transition-normal: 250ms ease-out;
    --transition-slow: 400ms ease-out;
    
    /* Z-index */
    --z-navigation: 100;
    --z-mobile-menu: 200;
    --z-modal: 300;
    
    /* Breakpoints */
    --bp-sm: 640px;
    --bp-md: 768px;
    --bp-lg: 1024px;
    --bp-xl: 1280px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    height: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--weight-normal);
    line-height: 1.6;
    color: var(--text-color-primary);
    background: var(--surface-primary);
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(255, 107, 53, 0.1) 0%, transparent 50%);
    background-attachment: fixed;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Accessibility */
.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;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: var(--space-4);
    z-index: var(--z-modal);
    padding: var(--space-2) var(--space-4);
    background: var(--color-primary);
    color: var(--surface-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: var(--weight-medium);
    transition: var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-4);
}

/* Focus States */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Layout Container */
.app {
    display: grid;
    grid-template-areas: 
        "sidebar main"
        "sidebar main";
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: 1fr;
    min-height: 100vh;
    gap: 0;
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-navigation);
    height: var(--mobile-nav-height);
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color-subtle);
    padding: 0 var(--space-4);
    align-items: center;
    justify-content: space-between;
}

.mobile-nav-brand {
    font-size: var(--text-lg);
    font-weight: var(--weight-bold);
    color: var(--color-primary);
    text-decoration: none;
}

.hamburger {
    background: none;
    border: none;
    width: 32px;
    height: 32px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    cursor: pointer;
    z-index: var(--z-mobile-menu);
}

.hamburger span {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--text-color-primary);
    border-radius: 1px;
    transition: var(--transition-normal);
    transform-origin: center;
}

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

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Sidebar */
.sidebar {
    grid-area: sidebar;
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color-subtle);
    display: flex;
    flex-direction: column;
    position: fixed;
    width: var(--sidebar-width);
    height: 100vh;
    z-index: var(--z-navigation);
    overflow-y: auto;
    overflow-x: hidden;
}

.profile-section {
    padding: var(--space-8) var(--space-6);
    text-align: center;
    border-bottom: 1px solid var(--border-color-subtle);
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto var(--space-4);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-large);
    overflow: hidden;
    border: 2px solid var(--color-primary);
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.profile-name {
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-2);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.profile-title {
    font-size: var(--text-lg);
    color: var(--text-color-secondary);
    margin-bottom: var(--space-4);
}

.profile-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    justify-content: center;
    margin-bottom: var(--space-6);
}

.tag {
    padding: var(--space-1) var(--space-2);
    background: transparent;
    border: none;
    border-radius: 0;
    font-size: var(--text-xs);
    font-weight: var(--weight-normal);
    color: var(--text-color-muted);
    text-transform: none;
    letter-spacing: 0;
    position: relative;
}

.tag:not(:last-child)::after {
    content: '•';
    position: absolute;
    right: -8px;
    color: var(--text-color-muted);
    opacity: 0.5;
}

.social-links-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-top: var(--space-4);
}

.social-links {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color-secondary);
    text-decoration: none;
    transition: var(--transition-normal);
    border: 1px solid var(--border-color-subtle);
}

.social-link:hover {
    background: var(--color-primary);
    color: var(--surface-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* Sidebar-only: widen Coffee button to 3 circles incl. gaps */
.sidebar .social-links .coffee-btn {
	width: calc(3 * 40px + 2 * var(--space-3));
	border-radius: 20px;
	display: flex;
	align-items: center;
	justify-content: space-around;
	gap: var(--space-2);
	padding: 0 var(--space-3);
}

.coffee-text {
	font-size: var(--text-sm);
	font-weight: var(--weight-medium);
	white-space: nowrap;
}



/* Navigation */
.navigation {
    flex: 1;
    padding: var(--space-6);
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    color: var(--text-color-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    font-weight: var(--weight-medium);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
    z-index: -1;
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--text-color-primary);
    transform: translateX(4px);
}

.nav-link.active {
    color: var(--surface-primary);
    font-weight: var(--weight-semibold);
}

.nav-icon {
    width: 20px;
    height: 20px;
    opacity: 0.7;
}

.nav-link:hover .nav-icon,
.nav-link.active .nav-icon {
    opacity: 1;
}

/* Full-width nav item (Buy Me a Coffee) */
.nav-item-full {
    margin-top: var(--space-4);
}

.nav-item-full .nav-link {
    justify-content: center;
    background-color: var(--surface-tertiary);
    border: 1px solid var(--border-color-subtle);
    transition: all 0.3s ease;
}

.nav-item-full .nav-link:hover {
    background-color: var(--color-primary);
    color: var(--surface-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.nav-item-full .nav-link:hover::before {
    width: 0; /* Disable the gradient on hover */
}

/* Main Content */
.main-content {
    grid-area: main;
    padding: var(--space-8) var(--space-6);
    /* margin-left: var(--sidebar-width); */
}

.content-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-8);
}

.section {
    display: none;
    animation: fadeInUp 0.6s ease-out;
}

.section.active {
    display: block;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Section Headers */
.section-header {
    margin-bottom: var(--space-8);
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-4);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: var(--text-xl);
    color: var(--text-color-secondary);
    line-height: 1.7;
    max-width: 600px;
}

/* Cards & Tiles */
.card {
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-subtle);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-normal);
}

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

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

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

.card-text {
    color: var(--text-color-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

/* Grid Layouts */
.grid {
    display: grid;
    gap: var(--space-6);
}

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

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Ultra-simplified Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-6);
}

.skill-card {
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    transition: all 0.3s ease;
}

.skill-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.skill-category {
    font-size: var(--text-xl);
    font-weight: var(--weight-semibold);
    margin-bottom: var(--space-4);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.skill-category i {
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.skill-card:hover .skill-category i {
    opacity: 1;
}

.skill-group {
    margin-bottom: var(--space-4);
}

.skill-group-title {
    font-size: var(--text-sm);
    color: var(--text-color-muted);
    margin-bottom: var(--space-2);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: var(--weight-medium);
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    list-style: none;
    padding: 0;
    margin: 0;
}

.skill-item {
    background: var(--surface-tertiary);
    color: var(--text-color-secondary);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    border: 1px solid transparent;
}

.skill-item i {
    font-size: 0.9em;
    color: var(--color-primary);
    opacity: 0.9;
    transition: all 0.2s ease;
}

.skill-item:hover {
    background: rgba(0, 212, 255, 0.1);
    color: var(--text-color-primary);
    transform: translateY(-1px);
    border-color: rgba(0, 212, 255, 0.2);
}

.skill-item:hover i {
    opacity: 1;
}

.skill-toggle {
    background: none;
    border: none;
    color: var(--color-primary);
    font-size: var(--text-sm);
    padding: var(--space-2) 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    margin-top: var(--space-2);
    transition: all 0.2s ease;
}

.skill-toggle:hover {
    color: var(--color-primary-light);
}

.skill-toggle i {
    margin-left: var(--space-2);
    transition: transform 0.3s ease;
}

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

.more-skills {
    display: none;
}

.more-skills.visible {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

/* Projects Workspace - Kanban-Style Layout */
.projects-workspace {
    margin-top: var(--space-12);
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 var(--space-4);
}

.project-section {
    margin-bottom: var(--space-16);
}

.project-section:last-child {
    margin-bottom: 0;
}

/* Section Dividers - Clean Line Style */
.section-divider {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-10);
    position: relative;
}

.section-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border-color-subtle) 0%, transparent 100%);
}

.section-label {
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
    color: var(--text-color-primary);
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: var(--text-sm);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-dot.active {
    background: #10B981;
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.4);
}

.status-dot.completed {
    background: #6B7280;
    box-shadow: 0 0 12px rgba(107, 114, 128, 0.2);
}

/* Projects Board - Grid Layout */
.projects-board {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--space-8);
}

/* Project Tiles - Clean Cards */
.project-tile {
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.project-tile::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
    transform-origin: left;
}

.project-tile:hover {
    transform: translateY(-6px);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(0, 212, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.3);
}

.project-tile:hover::before {
    transform: scaleX(1);
}

/* All project tiles have consistent styling */

/* Tile Headers */
.tile-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--border-color-subtle);
}

.project-meta {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--text-color-muted);
    font-weight: var(--weight-medium);
}

/* Status Indicators */
.status-indicator {
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.status-indicator.active {
    background: rgba(16, 185, 129, 0.15);
    color: #10B981;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-indicator.ongoing {
    background: rgba(245, 158, 11, 0.15);
    color: #F59E0B;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.status-indicator.completed {
    background: rgba(107, 114, 128, 0.15);
    color: #6B7280;
    border: 1px solid rgba(107, 114, 128, 0.3);
}

.status-indicator.prototype {
    background: rgba(139, 92, 246, 0.15);
    color: #8B5CF6;
    border: 1px solid rgba(139, 92, 246, 0.3);
}

/* Project Info */
.project-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.project-name {
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    color: var(--text-color-primary);
    margin: 0;
    line-height: 1.3;
}

.project-summary {
    color: var(--text-color-secondary);
    line-height: 1.6;
    font-size: var(--text-base);
    margin: 0;
}

/* Tech Grid - Cleaner Tag Layout */
.tech-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tech-tag {
    padding: var(--space-1) var(--space-3);
    background: var(--surface-tertiary);
    border: 1px solid var(--border-color-subtle);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
    color: var(--text-color-secondary);
    transition: all 0.2s ease;
}

.tech-tag.lead {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    font-weight: var(--weight-semibold);
}

.tech-tag:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
}

.tech-tag.lead:hover {
    background: var(--color-primary-light);
    transform: translateY(-1px);
}

/* Timeline */
.timeline {
    position: relative;
    margin-top: var(--space-8);
}

/* Custom scrollbar for timeline */
.timeline::-webkit-scrollbar {
    width: 6px;
}

.timeline::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 10px;
}

.timeline::-webkit-scrollbar-thumb {
    background: rgba(0, 212, 255, 0.3);
    border-radius: 10px;
}

.timeline::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 212, 255, 0.5);
}

/* Professional Experience Container */
.experience-container {
    max-width: 1000px;
    margin: var(--space-12) 0 0;
    padding: 0
}

/* Experience Period Grouping */
.experience-period {
    margin-bottom: var(--space-16);
    position: relative;
}

.experience-period:last-child {
    margin-bottom: 0;
}

/* Period Headers */
.period-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--border-color-subtle);
    position: relative;
}

.period-header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
}

.period-title {
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    color: var(--text-color-primary);
    margin: 0;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.period-badge {
    padding: var(--space-2) var(--space-4);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-xl);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--color-primary);
    white-space: nowrap;
}

/* Experience Grid Layout */
.experience-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

/* Primary Role Styling */
.experience-card.primary-role {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, 
        rgba(16, 185, 129, 0.1) 0%, 
        rgba(34, 211, 153, 0.05) 100%);
    border: 2px solid rgba(16, 185, 129, 0.2);
    position: relative;
    overflow: hidden;
}

.experience-card.primary-role::before {
    background: linear-gradient(135deg, #10B981 0%, #34D399 100%);
    height: 6px;
}

.experience-card.primary-role:hover {
    border-color: #10B981;
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.3),
        0 0 0 1px #10B981,
        0 0 60px rgba(16, 185, 129, 0.3);
}

/* Experience Cards */
.experience-card {
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color-subtle);
    border-radius: var(--radius-xl);
    padding: 0;
    box-shadow: var(--shadow-subtle);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    transform: translateY(0);
}

.experience-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: left;
}

.experience-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 0 1px var(--color-primary),
        0 0 40px rgba(0, 212, 255, 0.2);
    border-color: var(--color-primary);
}

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

/* Card Header */
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6) 0;
    margin-bottom: var(--space-4);
}

/* Role Badges */
.role-badge {
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-lg);
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    overflow: hidden;
}

.role-badge.tech {
    background: linear-gradient(135deg, #00D4FF 0%, #0099CC 100%);
    color: var(--surface-primary);
    box-shadow: 0 4px 12px rgba(0, 212, 255, 0.3);
}

.role-badge.service {
    background: linear-gradient(135deg, #FF6B35 0%, #FF8A65 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

.role-badge.freelance {
    background: linear-gradient(135deg, #8B5CF6 0%, #A78BFA 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.role-badge.creative {
    background: linear-gradient(135deg, #F59E0B 0%, #FCD34D 100%);
    color: var(--surface-primary);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.role-badge.founder {
    background: linear-gradient(135deg, #10B981 0%, #34D399 100%);
    color: var(--surface-primary);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.role-badge.partner {
    background: linear-gradient(135deg, #3B82F6 0%, #60A5FA 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.role-badge.horeca {
    background: linear-gradient(135deg, #EF4444 0%, #F87171 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

/* Experience Dates */
.experience-dates {
    font-size: var(--text-xs);
    color: var(--text-color-muted);
    font-weight: var(--weight-medium);
    padding: var(--space-1) var(--space-2);
    background: var(--surface-tertiary);
    border-radius: var(--radius-sm);
}

/* Experience Content */
.experience-content {
    padding: 0 var(--space-6) var(--space-6);
}

.experience-title {
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-2);
    color: var(--text-color-primary);
    line-height: 1.3;
}

.experience-company {
    font-size: var(--text-lg);
    color: var(--color-primary);
    margin-bottom: var(--space-5);
    font-weight: var(--weight-semibold);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Experience Highlights */
.experience-highlights {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.experience-highlights li {
    position: relative;
    padding-left: var(--space-6);
    color: var(--text-color-secondary);
    line-height: 1.6;
    font-size: var(--text-base);
    transition: color 0.3s ease;
}

.experience-highlights li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent);
    transform: translateY(-50%);
    transition: all 0.3s ease;
}

.experience-card:hover .experience-highlights li {
    color: var(--text-color-primary);
}

.experience-card:hover .experience-highlights li::before {
    background: var(--color-primary);
    transform: translateY(-50%) scale(1.2);
    box-shadow: 0 0 8px rgba(0, 212, 255, 0.6);
}

/* Full Width Cards */
.experience-card.full-width {
    grid-column: 1 / -1;
    max-width: 100%;
}

/* Completed Experience Styling */
.experience-card.completed {
    opacity: 0.85;
    position: relative;
}

.experience-card.completed::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(0, 0, 0, 0.05) 100%);
    pointer-events: none;
}

.experience-card.completed:hover {
    opacity: 1;
    transform: translateY(-6px) scale(1.01);
}

/* Education Timeline - Clean Linear Design */
.education-timeline {
    position: relative;
    margin-top: var(--space-8);
    max-width: 1000px;
}

.education-timeline::before {
    content: '';
    position: absolute;
    left: var(--space-8);
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-primary);
    z-index: 1;
}

.education-milestone {
    position: relative;
    padding-left: calc(var(--space-8) + var(--space-12));
    margin-bottom: var(--space-10);
}

.education-milestone:last-child {
    margin-bottom: 0;
}

.education-milestone::before {
    content: '';
    position: absolute;
    left: calc(var(--space-8) - 8px);
    top: var(--space-1);
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 3px solid var(--surface-primary);
    z-index: 2;
    transition: var(--transition-normal);
}

.education-milestone:hover::before {
    transform: scale(1.05);
}

/* Period Labels */
.milestone-period {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: var(--color-primary);
    color: var(--surface-primary);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    margin-bottom: var(--space-5);
    font-family: var(--font-mono);
    letter-spacing: 0.02em;
}

/* Milestone Content */
.milestone-content {
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    transition: var(--transition-normal);
}

.education-milestone:hover .milestone-content {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
    border-color: var(--border-color);
}

/* Degree Information */
.degree-info {
    margin-bottom: var(--space-6);
}

.degree-title {
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-3);
    color: var(--text-color-primary);
    line-height: 1.3;
}

.institution {
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
    margin-bottom: var(--space-4);
}

.institution.primary {
    color: var(--color-primary);
}

.institution.exchange {
    color: var(--color-accent);
}

.degree-description {
    color: var(--text-color-secondary);
    line-height: 1.6;
    margin: 0;
}

/* Exchange Program Styling */
.exchange-program {
    background: rgba(255, 107, 53, 0.08);
    border: 1px solid rgba(255, 107, 53, 0.25);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    margin-top: var(--space-6);
    position: relative;
    border-left: 4px solid var(--color-accent);
}

.exchange-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
    gap: var(--space-2);
}

.exchange-label {
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.exchange-period {
    font-size: var(--text-xs);
    color: var(--text-color-muted);
    background: rgba(255, 107, 53, 0.1);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
}

.exchange-title {
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
    margin-bottom: var(--space-2);
    color: var(--text-color-primary);
}

.exchange-description {
    color: var(--text-color-secondary);
    line-height: 1.6;
    margin: 0;
    font-size: var(--text-sm);
}

/* About Section Specific Styles */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    margin-bottom: var(--space-6);
}

.enhanced-grid {
    margin-bottom: var(--space-8);
}

.skills-interests-grid {
    margin-bottom: 0;
}

.about-grid .card {
    height: 100%;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-grid .card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-large);
}

/* Hero Introduction Card */
.hero-intro-card {
    background: linear-gradient(135deg, 
        rgba(0, 212, 255, 0.08) 0%, 
        rgba(0, 212, 255, 0.05) 50%,
        rgba(0, 212, 255, 0.03) 100%);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    margin-bottom: var(--space-8);
    position: relative;
    overflow: hidden;
}

.hero-intro-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
}

.intro-content {
    display: block;
    margin-bottom: 0;
}

.intro-title {
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    color: var(--text-color-primary);
    margin-bottom: var(--space-4);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.intro-description {
    color: var(--text-color-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
    font-size: var(--text-base);
}

.intro-description:last-child {
    margin-bottom: 0;
}

.highlight {
    color: var(--color-primary);
    font-weight: var(--weight-semibold);
    padding: 2px 4px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 4px;
}


/* Quote Section */
.intro-quote {
    background: rgba(0, 212, 255, 0.08);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    position: relative;
    margin: var(--space-4) 0;
}

.intro-quote blockquote {
    font-size: var(--text-lg);
    font-style: italic;
    color: var(--text-color-secondary);
    margin: 0;
    line-height: 1.6;
    position: relative;
}

.intro-quote blockquote::before {
    content: '"';
    font-size: 3em;
    color: var(--color-primary);
    position: absolute;
    top: -10px;
    left: -15px;
    opacity: 0.3;
    font-family: Georgia, serif;
}

/* Card Header with Icons */
.card-header-icon {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--border-color-subtle);
}

.card-header-icon i {
    font-size: var(--text-xl);
    color: var(--color-primary);
    padding: var(--space-2);
    background: rgba(0, 212, 255, 0.1);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Enhanced Strength Grid */
.strength-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.strength-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
}

.strength-item:hover {
    background: rgba(0, 212, 255, 0.05);
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateX(5px);
}

.strength-icon-container {
    position: relative;
    flex-shrink: 0;
}

.strength-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--surface-tertiary);
    border-radius: 50%;
    color: var(--color-primary);
    position: relative;
    z-index: 2;
    transition: var(--transition-normal);
}

.strength-pulse {
    position: absolute;
    top: 0;
    left: 0;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--color-primary);
    opacity: 0;
    transform: scale(1);
    z-index: 1;
}

.strength-item:hover .strength-icon {
    background: var(--color-primary);
    color: var(--surface-primary);
    transform: scale(1.1);
}

.strength-item:hover .strength-pulse {
    animation: pulseEffect 0.6s ease-out;
}

@keyframes pulseEffect {
    0% {
        opacity: 0.7;
        transform: scale(1);
    }
    100% {
        opacity: 0;
        transform: scale(1.4);
    }
}

.strength-content {
    flex: 1;
}

.strength-content strong {
    display: block;
    margin-bottom: var(--space-1);
    color: var(--text-color-primary);
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
}

.strength-content p {
    color: var(--text-color-secondary);
    margin: 0;
    font-size: var(--text-sm);
    line-height: 1.5;
}

/* Philosophy Card */
.philosophy-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.philosophy-point {
    display: flex;
    gap: var(--space-3);
    align-items: flex-start;
}

.point-marker {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-primary);
    margin-top: 8px;
    flex-shrink: 0;
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.philosophy-point p {
    color: var(--text-color-secondary);
    line-height: 1.6;
    margin: 0;
}

.philosophy-highlight {
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    text-align: center;
    position: relative;
    margin-top: var(--space-2);
}

.philosophy-highlight i {
    color: var(--color-primary);
    margin-right: var(--space-2);
    font-size: var(--text-lg);
}

.philosophy-highlight span {
    color: var(--color-primary);
    font-weight: var(--weight-semibold);
    font-style: italic;
}

/* Enhanced Language Skills */
.language-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.language-item {
    padding: var(--space-4);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color-subtle);
    transition: all 0.3s ease;
}

.language-item:hover {
    background: rgba(0, 212, 255, 0.05);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.language-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
}

.language-name {
    font-weight: var(--weight-semibold);
    color: var(--text-color-primary);
    font-size: var(--text-base);
}

.language-level {
    font-size: var(--text-sm);
    color: var(--color-primary);
    background: rgba(0, 212, 255, 0.15);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    font-weight: var(--weight-medium);
    border: 1px solid rgba(0, 212, 255, 0.3);
}

/* Animated Progress Bars */
.language-progress {
    width: 100%;
    height: 6px;
    background: var(--surface-tertiary);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 3px;
    width: 0;
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.3) 50%, 
        transparent 100%);
    transform: translateX(-100%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* Enhanced Interest Tags */
.interests-container {
    position: relative;
}

.interests-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.interest-tag {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.interest-tag i {
    font-size: var(--text-sm);
    opacity: 0.8;
}

/* Interest Tag Categories */
.tech-interest {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(0, 212, 255, 0.05) 100%);
    color: var(--color-primary);
    border-color: rgba(0, 212, 255, 0.3);
}

.tech-interest:hover {
    background: rgba(0, 212, 255, 0.2);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.3);
}

.academic-interest {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);
    color: #8B5CF6;
    border-color: rgba(139, 92, 246, 0.3);
}

.academic-interest:hover {
    background: rgba(139, 92, 246, 0.2);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 5px 15px rgba(139, 92, 246, 0.3);
}

.creative-interest {
    background: linear-gradient(135deg, rgba(147, 51, 234, 0.1) 0%, rgba(147, 51, 234, 0.05) 100%);
    color: #9333EA;
    border-color: rgba(147, 51, 234, 0.3);
}

.creative-interest:hover {
    background: rgba(147, 51, 234, 0.2);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 5px 15px rgba(147, 51, 234, 0.3);
}

.lifestyle-interest {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
    color: #10B981;
    border-color: rgba(16, 185, 129, 0.3);
}

.lifestyle-interest:hover {
    background: rgba(16, 185, 129, 0.2);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 5px 15px rgba(16, 185, 129, 0.3);
}

/* Responsive adjustments for enhanced about section */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .intro-content {
        display: block;
    }
}

@media (max-width: 768px) {
    .hero-intro-card {
        padding: var(--space-6);
    }
    
    .intro-title {
        font-size: var(--text-xl);
    }
    
    .intro-quote blockquote {
        font-size: var(--text-base);
    }
    
    .strength-item {
        padding: var(--space-3);
        border-radius: var(--radius-md);
    }
    
    .strength-icon-container {
        align-self: flex-start;
    }
    
    .strength-icon,
    .strength-pulse {
        width: 45px;
        height: 45px;
    }
    
    .philosophy-content {
        gap: var(--space-4);
    }
    
    .philosophy-highlight {
        padding: var(--space-3);
    }
    
    .interest-tag {
        padding: var(--space-2) var(--space-3);
        font-size: var(--text-xs);
    }
    
    .interest-tag i {
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .hero-intro-card {
        padding: var(--space-4);
        margin-bottom: var(--space-6);
    }
    
    .intro-content {
        margin-bottom: 0;
    }
    
    .intro-title {
        font-size: var(--text-lg);
        margin-bottom: var(--space-3);
    }
    
    .intro-description {
        font-size: var(--text-sm);
        margin-bottom: var(--space-3);
    }
    
    .intro-quote {
        padding: var(--space-4);
    }
    
    .intro-quote blockquote {
        font-size: var(--text-sm);
    }
    
    .about-grid {
        gap: var(--space-4);
        margin-bottom: var(--space-4);
    }
    
    .card-header-icon {
        margin-bottom: var(--space-4);
        padding-bottom: var(--space-2);
    }
    
    .card-header-icon i {
        width: 35px;
        height: 35px;
        font-size: var(--text-lg);
    }
    
    .card-title {
        font-size: var(--text-lg);
    }
    
    .strength-grid {
        gap: var(--space-3);
    }
    
    .strength-item {
        padding: var(--space-2);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-2);
    }
    
    .strength-icon,
    .strength-pulse {
        width: 40px;
        height: 40px;
    }
    
    .strength-content strong {
        font-size: var(--text-sm);
    }
    
    .philosophy-content {
        gap: var(--space-3);
    }
    
    .philosophy-point {
        gap: var(--space-2);
    }
    
    .philosophy-point p {
        font-size: var(--text-sm);
    }
    
    .philosophy-highlight {
        padding: var(--space-2);
        margin-top: var(--space-2);
    }
    
    .philosophy-highlight i {
        font-size: var(--text-base);
    }
    
    .language-item {
        padding: var(--space-3);
    }
    
    .language-info {
        margin-bottom: var(--space-2);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-1);
    }
    
    .language-name {
        font-size: var(--text-sm);
    }
    
    .language-level {
        font-size: var(--text-xs);
        align-self: flex-start;
    }
    
    .interests-grid {
        gap: var(--space-2);
    }
    
    .interest-tag {
        padding: var(--space-1) var(--space-2);
        font-size: 11px;
        gap: var(--space-1);
    }
    
    .interest-tag i {
        font-size: 10px;
    }
}

/* Mobile Profile Section - Business Card Style */
.mobile-profile-section {
    display: none;
    padding: var(--space-6) 0;
    margin-top: var(--space-6);
}

.mobile-profile-card {
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-large);
    position: relative;
    overflow: hidden;
}

.mobile-profile-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
}

.mobile-profile-header {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    margin-bottom: var(--space-6);
}

.mobile-profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    position: relative;
    flex-shrink: 0;
    box-shadow: var(--shadow-medium);
    border: 2px solid var(--color-primary);
}

.mobile-profile-avatar::before {
    content: "";
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: var(--gradient-primary);
    z-index: -1;
}

.mobile-profile-info {
    flex: 1;
    min-width: 0;
}

.mobile-profile-name {
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-1);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.mobile-profile-title {
    font-size: var(--text-base);
    color: var(--text-color-secondary);
    font-weight: var(--weight-medium);
    line-height: 1.3;
}

.mobile-profile-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
    justify-content: space-between;
}

.mobile-profile-tags .tag {
    background: var(--surface-secondary);
    border: 1px solid var(--border-color-subtle);
    font-size: var(--text-xs);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-md);
}

.mobile-social-links {
    display: flex;
    justify-content: space-between;
    gap: var(--space-2);
}

.mobile-social-links .social-link {
    width: 40px;
    height: 40px;
    background: var(--surface-secondary);
    border: 1px solid var(--border-color-subtle);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color-secondary);
    text-decoration: none;
    transition: var(--transition-normal);
    font-size: var(--text-base);
    flex-shrink: 0;
}

.mobile-social-links .social-link:hover {
    background: var(--color-primary);
    color: var(--surface-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
    border-color: var(--color-primary);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .app {
        grid-template-areas: "main";
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: fixed;
        top: var(--mobile-nav-height);
        left: -100%;
        width: 300px;
        height: calc(100vh - var(--mobile-nav-height));
        z-index: var(--z-mobile-menu);
        transition: var(--transition-normal);
        border-right: none;
        border-top: 1px solid var(--border-color-subtle);
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .mobile-nav {
        display: flex;
    }
    
    .mobile-profile-section {
        display: block;
    }
    
    .main-content {
        padding-top: var(--mobile-nav-height);
        margin-left: 0;
    }
    
    .content-container {
        padding: var(--space-6) var(--space-4);
    }
    
    .section-title {
        font-size: var(--text-3xl);
    }
    
    .profile-section {
        padding: var(--space-6) var(--space-4);
    }
    
    .profile-avatar {
        width: 100px;
        height: 100px;
        font-size: var(--text-3xl);
    }
}

@media (max-width: 768px) {
    .content-container {
        padding: var(--space-4) var(--space-3);
    }
    
    .section-title {
        font-size: var(--text-2xl);
    }
    
    /* Experience responsive layout - tablet */
    .experience-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .period-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-2);
    }
    
    .period-title {
        font-size: var(--text-xl);
    }
    
    .experience-title {
        font-size: var(--text-lg);
    }
    
    .experience-company {
        font-size: var(--text-base);
    }
    
    .section-subtitle {
        font-size: var(--text-lg);
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    /* Projects responsive layout - tablet */
    .projects-workspace {
        padding: 0 var(--space-2);
    }
    
    .projects-board {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .section-label {
        font-size: var(--text-xs);
    }
    
    .project-name {
        font-size: var(--text-lg);
    }
    
    /* Experience responsive layout - mobile */
    .experience-container {
        padding: 0 var(--space-2);
    }
    
    .experience-period {
        margin-bottom: var(--space-12);
    }
    
    .period-header {
        margin-bottom: var(--space-6);
        padding-bottom: var(--space-3);
    }
    
    .period-title {
        font-size: var(--text-lg);
    }
    
    .period-badge {
        padding: var(--space-1) var(--space-3);
        font-size: var(--text-xs);
    }
    
    .experience-card {
        border-radius: var(--radius-lg);
    }
    
    .card-header {
        padding: var(--space-4) var(--space-4) 0;
        margin-bottom: var(--space-3);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-2);
    }
    
    .experience-content {
        padding: 0 var(--space-4) var(--space-4);
    }
    
    .experience-title {
        font-size: var(--text-base);
    }
    
    .experience-company {
        font-size: var(--text-sm);
        margin-bottom: var(--space-3);
    }
    
    .experience-highlights li {
        font-size: var(--text-sm);
        padding-left: var(--space-5);
    }
    
    .experience-highlights li::before {
        width: 6px;
        height: 6px;
        top: 10px;
    }
    
    .experience-card:hover {
        transform: translateY(-4px) scale(1.01);
        box-shadow: 
            0 10px 25px rgba(0, 0, 0, 0.2),
            0 0 0 1px var(--color-primary),
            0 0 20px rgba(0, 212, 255, 0.15);
    }
    
    /* Education responsive layout - mobile */
    .education-timeline::before {
        left: var(--space-6);
    }
    
    .education-milestone {
        padding-left: calc(var(--space-6) + var(--space-8));
    }
    
    .education-milestone::before {
        left: calc(var(--space-6) - 8px);
        width: 14px;
        height: 14px;
    }
    
    .milestone-content {
        padding: var(--space-4);
    }
    
    .exchange-program {
        padding: var(--space-4);
        margin-top: var(--space-4);
    }
    
    .exchange-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-1);
    }
    
    .card,
    .skill-card {
        padding: var(--space-4);
    }
    
    /* Projects responsive layout - mobile */
    .projects-workspace {
        margin-top: var(--space-8);
        padding: 0 var(--space-2);
    }
    
    .project-section {
        margin-bottom: var(--space-12);
    }
    
    .section-divider {
        margin-bottom: var(--space-6);
        gap: var(--space-3);
    }
    
    .section-label {
        font-size: 10px;
    }
    
    .status-dot {
        width: 6px;
        height: 6px;
    }
    
    .projects-board {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .project-tile {
        padding: var(--space-4);
        border-radius: var(--radius-md);
    }
    
    .tile-header {
        margin-bottom: var(--space-4);
        padding-bottom: var(--space-2);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-2);
    }
    
    .project-meta {
        font-size: var(--text-xs);
    }
    
    .status-indicator {
        font-size: 10px;
        padding: 4px 8px;
    }
    
    .project-name {
        font-size: var(--text-base);
    }
    
    .project-summary {
        font-size: var(--text-sm);
    }
    
    .tech-tag {
        font-size: 10px;
        padding: 4px 8px;
    }
    
    .project-tile:hover {
        transform: translateY(-4px);
        box-shadow: 
            0 12px 24px rgba(0, 0, 0, 0.15),
            0 0 0 1px rgba(0, 212, 255, 0.1);
    }
}

@media (max-width: 480px) {
    .mobile-nav {
        padding: 0 var(--space-3);
    }
    
    .content-container {
        padding: var(--space-3) var(--space-2);
    }
    
    .profile-section {
        padding: var(--space-4) var(--space-3);
    }
    
    .profile-avatar {
        width: 80px;
        height: 80px;
        font-size: var(--text-2xl);
    }
    
    .profile-name {
        font-size: var(--text-xl);
    }
    
    .profile-title {
        font-size: var(--text-base);
    }
    
    .navigation {
        padding: var(--space-4) var(--space-3);
    }
    
    .nav-link {
        padding: var(--space-2) var(--space-3);
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface-secondary);
}

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

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

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--surface-tertiary);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-mono { font-family: var(--font-mono); }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--text-color-secondary); }
.text-muted { color: var(--text-color-muted); }

.bg-primary { background: var(--color-primary); }
.bg-surface { background: var(--surface-secondary); }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }

.shadow { box-shadow: var(--shadow-medium); }
.shadow-lg { box-shadow: var(--shadow-large); }

.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }