:root {
    /* Color Variables */
    --color-primary: #000000;
    --color-secondary: #FFFFFF;
    --color-accent: #00B2FF;
    --color-text: #333333;
    --color-background: #F8F8F8;
    
    /* Typography */
    --font-family: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(40px + 60px); /* Stock ticker height + nav height */
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 3.2rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-md);
}

/* Stock Ticker */
.stock-ticker {
    width: 100%;
    height: 40px;
    background-color: #1a1a1a;
    color: #00ff00;
    overflow: hidden;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1001;
}

.ticker-content {
    white-space: nowrap;
    position: absolute;
    animation: ticker 30s linear infinite;
    display: flex;
    align-items: center;
    height: 100%;
}

.ticker-item {
    display: inline-flex;
    align-items: center;
    margin-right: 30px;
    font-family: 'Inter', sans-serif;
    font-size: 14px;
}

.ticker-item .symbol {
    font-weight: bold;
    margin-right: 8px;
}

.ticker-item .price {
    margin-right: 5px;
}

.ticker-item .change {
    padding: 2px 5px;
    border-radius: 3px;
}

.ticker-item .change.positive {
    background-color: #004d00;
    color: #00ff00;
}

.ticker-item .change.negative {
    background-color: #4d0000;
    color: #ff0000;
}

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

/* Navigation */
.main-nav {
    position: fixed;
    top: 40px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

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

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--color-accent);
}

/* Hero Section */
.hero-section {
    height: 95vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--color-primary);
    color: var(--color-secondary);
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-xl);
}

.hero-content {
    max-width: 1200px;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    padding: 0 var(--spacing-md);
}

.hero-text {
    flex: 1;
    text-align: left;
}

.profile-container {
    flex-shrink: 0;
    width: 400px;
    height: 400px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
    border-radius: 50%;
    padding: 40px;
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 20px solid #000;
    box-shadow: 0 0 0 20px white;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-primary);
}

.hero-background::before {
    content: 'x = -b ± √(b² - 4ac)/2a    e^(iπ) + 1 = 0    ∫ f(x)dx = F(x) + C    lim(x→∞) 1/x = 0';
    position: absolute;
    top: 25%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-15deg);
    color: #FFFFFF;
    font-size: 36px;
    font-family: "Times New Roman", serif;
    white-space: nowrap;
    width: max-content;
    text-shadow: 0 0 20px rgba(0, 178, 255, 0.8),
                 0 0 30px rgba(0, 178, 255, 0.6);
}

.hero-background::after {
    content: '∫ ∑ ∏ ∂ ∇ ∆ ∮ ∞ π    a² + b² = c²    σ = √(Σ(x - μ)²/N)    ∮ E·dl = -dΦ/dt';
    position: absolute;
    bottom: 35%;
    left: 50%;
    transform: translate(-50%, 50%) rotate(15deg);
    color: #FFFFFF;
    font-size: 32px;
    font-family: "Times New Roman", serif;
    white-space: nowrap;
    width: max-content;
    text-shadow: 0 0 20px rgba(0, 178, 255, 0.8),
                 0 0 30px rgba(0, 178, 255, 0.6);
}

.hero-background::before,
.hero-background::after {
    pointer-events: none;
}

.hero-background {
    overflow: hidden;
}

.hero-background {
    overflow: hidden;
    width: 100%;
}

.main-title {
    margin-bottom: var(--spacing-md);
    font-size: 3.2rem;
}

.subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-accent);
    color: var(--color-secondary);
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 178, 255, 0.4);
}

/* Content Sections */
section {
    padding: var(--spacing-lg) var(--spacing-md);
}

.hero-section {
    padding-bottom: var(--spacing-md);
}

.about-section {
    padding-top: var(--spacing-md);
}

.content-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* About Section */
.about-section {
    background-color: var(--color-secondary);
    margin-top: -20vh;
    position: relative;
    z-index: 2;
    border-top-left-radius: 40px;
    border-top-right-radius: 40px;
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.1);
}

.quote-container {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

blockquote {
    font-size: 2rem;
    font-weight: 300;
    color: var(--color-accent);
    max-width: 800px;
    margin: 0 auto;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.about-item {
    padding: var(--spacing-md);
    background: var(--color-background);
    border-radius: 8px;
    transition: transform 0.3s ease;
}

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

/* Achievements Section */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.achievement-card {
    background: var(--color-secondary);
    padding: var(--spacing-md);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.achievement-card:hover {
    transform: translateY(-5px);
}

/* CV Section */
.cv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.cv-item {
    padding: var(--spacing-md);
    background: var(--color-secondary);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.cv-item ul {
    list-style-type: none;
}

.cv-item li {
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-sm);
    position: relative;
}

.cv-item li::before {
    content: "•";
    color: var(--color-accent);
    position: absolute;
    left: 0;
}

.download-cv {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-primary);
    color: var(--color-secondary);
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.download-cv:hover {
    background-color: var(--color-accent);
}

/* Contact Section */
.contact-section {
    background-color: var(--color-secondary);
}

.contact-intro {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

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

input, textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--color-background);
    border-radius: 4px;
    font-family: var(--font-family);
    transition: border-color 0.3s ease;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

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

.submit-button {
    width: 100%;
    padding: var(--spacing-sm);
    background-color: var(--color-accent);
    color: var(--color-secondary);
    border: none;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.submit-button:hover {
    background-color: var(--color-primary);
}

/* Footer */
.footer {
    background-color: var(--color-primary);
    color: var(--color-secondary);
    padding: var(--spacing-lg) var(--spacing-md);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

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

.footer-links a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-social {
    margin-bottom: var(--spacing-md);
}

.social-link {
    color: var(--color-secondary);
    text-decoration: none;
    margin: 0 var(--spacing-sm);
    transition: color 0.3s ease;
}

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

.copyright {
    opacity: 0.7;
    font-size: 0.9rem;
}