:root {
    /* Color Palette */
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #0f172a;
    --secondary-light: #1e293b;
    --accent-color: #06b6d4;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --bg-color: #ffffff;
    --bg-gray: #f8fafc;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Borders */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background: var(--bg-gray);
    line-height: 1.6;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
}

.container {
    max-width: 1000px;
    margin: 2rem auto;
    background: var(--bg-color);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

/* Header Styles */
.resume-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: var(--spacing-2xl) var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.resume-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    z-index: 0;
}

.header-content {
    position: relative;
    z-index: 1;
    margin-bottom: var(--spacing-lg);
}

.name {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.025em;
}

.title {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.summary {
    font-size: 1rem;
    line-height: 1.7;
    opacity: 0.9;
    max-width: 800px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

.contact-item .icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.contact-item a {
    color: white;
    text-decoration: none;
    transition: opacity 0.2s;
}

.contact-item a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* Two Column Layout */
.two-column {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-2xl);
    padding: var(--spacing-2xl);
}

.left-column {
    border-right: 2px solid var(--border-color);
    padding-right: var(--spacing-xl);
}

/* Section Styles */
.section {
    margin-bottom: var(--spacing-2xl);
}

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

.section-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 3px solid var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Skills Section */
.skills-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.skill-category h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.skill-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-gray);
    color: var(--primary-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    font-weight: 500;
    transition: all 0.2s;
}

.skill-tag:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Education Section */
.education-item {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.education-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.education-item h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xs);
}

.institution {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.period {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

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

/* Languages Section */
.language-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.language-item:last-child {
    border-bottom: none;
}

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

.language-level {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Interests Section */
.interests {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.interest-tag {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--accent-color), var(--primary-light));
    color: white;
    border-radius: var(--radius-lg);
    font-size: 0.8125rem;
    font-weight: 500;
}

/* Experience Section */
.experience-item {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.experience-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.job-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--spacing-xs);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.job-header h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.job-header .period {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

.company {
    font-size: 0.9375rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.responsibilities {
    list-style: none;
    padding-left: 0;
}

.responsibilities li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.responsibilities li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Projects Section */
.project-item {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--bg-gray);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s;
}

.project-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

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

.project-item h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.project-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.project-link {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-md);
    transition: color 0.2s;
}

.project-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tech-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: white;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

/* Print Styles */
@media print {
    body {
        background: white;
    }
    
    .container {
        margin: 0;
        box-shadow: none;
        border-radius: 0;
        max-width: none;
    }
    
    .two-column {
        padding: 1rem;
        gap: 1.5rem;
    }
    
    .section {
        page-break-inside: avoid;
    }
    
    .experience-item,
    .project-item {
        page-break-inside: avoid;
    }
    
    .skill-tag:hover,
    .project-item:hover {
        transform: none;
        box-shadow: none;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        margin: 0;
        border-radius: 0;
    }
    
    .two-column {
        grid-template-columns: 1fr;
        padding: var(--spacing-lg);
        gap: var(--spacing-xl);
    }
    
    .left-column {
        border-right: none;
        padding-right: 0;
        border-bottom: 2px solid var(--border-color);
        padding-bottom: var(--spacing-xl);
    }
    
    .name {
        font-size: 2rem;
    }
    
    .resume-header {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .job-header {
        flex-direction: column;
        align-items: flex-start;
    }
}