:root {
    /* Color Palette */
    --color-primary: #5b21b6;
    --color-primary-dark: #4c1d95;
    --color-primary-light: #7c3aed;
    --color-accent: #3b82f6;
    --color-accent-dark: #2563eb;

    --color-bg: #ffffff;
    --color-bg-alt: #f9fafb;
    --color-surface: #ffffff;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-border: #e5e7eb;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Layout */
    --container-max-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text);
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.25rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

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

a:hover {
    color: var(--color-primary-dark);
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

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

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

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
}

.hero-content {
    max-width: 700px;
}

.hero-greeting {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-role {
    font-size: 1.5rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.hero-tagline {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.hero-counter {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.hero-counter p {
    color: var(--color-text-light);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(91, 33, 182, 0.2);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

/* Section Styles */
.section {
    padding: var(--spacing-xl) 0;
}

.section:nth-child(even) {
    background-color: var(--color-bg-alt);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-size: 1.125rem;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-image img {
    width: 100%;
    max-width: 300px;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.about-text p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.skill-category {
    background-color: var(--color-surface);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.skill-category:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: var(--color-primary);
}

.skill-category-title {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.25rem;
}

.skill-list {
    list-style: none;
}

.skill-list li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text-light);
    position: relative;
    padding-left: 1.5rem;
}

.skill-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

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

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: var(--spacing-lg);
}

.timeline-marker {
    position: absolute;
    left: 12px;
    top: 0;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background-color: var(--color-primary);
    border: 3px solid var(--color-bg);
    box-shadow: 0 0 0 4px var(--color-primary-light);
}

.timeline-content {
    background-color: var(--color-surface);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.timeline-content:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: var(--color-primary);
}

.timeline-title {
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.timeline-company {
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.timeline-period {
    color: var(--color-text-light);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.timeline-description {
    list-style: none;
}

.timeline-description li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text-light);
    position: relative;
    padding-left: 1.5rem;
}

.timeline-description li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* Blog Section */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.blog-card {
    background-color: var(--color-surface);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: var(--color-primary);
}

.blog-title {
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.blog-excerpt {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

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

.blog-link:hover {
    color: var(--color-accent-dark);
}

/* Contact Section */
.contact-form {
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(91, 33, 182, 0.1);
}

.contact-info {
    text-align: center;
    margin-top: var(--spacing-md);
}

.contact-info p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.contact-email {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-primary);
}

/* Footer */
.footer {
    background-color: var(--color-text);
    color: white;
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    text-align: center;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-social a {
    color: white;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
}

.footer-social a:hover {
    background-color: var(--color-primary);
    transform: translateY(-3px);
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        flex-direction: column;
        background-color: white;
        width: 100%;
        padding: var(--spacing-md);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        transition: var(--transition);
    }

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

    .nav-toggle {
        display: flex;
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-image img {
        margin: 0 auto;
    }

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

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

    .timeline-marker {
        left: 2px;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section {
        padding: var(--spacing-lg) 0;
    }

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