:root {
    --primary-color: #1a1a1a;
    --secondary-color: #00b4d8;
    --accent-color: #90e0ef;
    --text-color: #e0e0e0;
    --text-muted: #a0a0a0;
    --background-dark: #121212;
    --background-light: #1e1e1e;
    --card-background: #2d2d2d;
    --border-color: #404040;
    --max-width: 1200px;
    --border-radius: 12px;
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(180deg,
        var(--background-dark) 0%,
        var(--background-light) 40%,
        var(--background-light) 60%,
        var(--background-dark) 100%
    );
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(0, 180, 216, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.site-header {
    background-color: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--secondary-color);
    transition: width var(--transition-speed) ease;
}

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

.nav-links a:hover::after {
    width: 100%;
}

/* Main Content */
.site-content {
    margin-top: 60px;
    flex: 1 0 auto;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.hero h1 {
    font-size: 3rem;
    color: var(--text-color);
    margin-bottom: 0.75rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 1.5rem;
    line-height: 1.6;
}

.hero-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--secondary-color);
    color: var(--text-color);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all var(--transition-speed) ease;
    font-weight: 500;
    border: 2px solid transparent;
}

.btn:hover {
    background-color: transparent;
    border-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 180, 216, 0.2);
}

/* Section Styles */
.section {
    padding: 1.5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 1.5rem;
}

.section-title h2 {
    font-size: 2rem;
    color: var(--text-color);
    font-weight: 700;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--secondary-color);
    border-radius: 2px;
}

/* Card Styles */
.card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

/* Footer Styles */
.site-footer {
    background-color: transparent;
    color: var(--text-color);
    padding: 2rem 0;
    text-align: center;
    border-top: none;
    flex-shrink: 0;
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 15%;
    right: 15%;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--border-color) 50%,
        transparent 100%
    );
}

.social-links {
    margin-bottom: 1rem;
}

.social-links a {
    color: var(--text-color);
    font-size: 1.5rem;
    margin: 0 1rem;
    transition: color var(--transition-speed) ease;
}

.social-links a:hover {
    color: var(--secondary-color);
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.skill-category {
    background: var(--card-background);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-speed) ease;
}

.skill-category:hover {
    transform: translateY(-5px);
}

.skill-category h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.4rem;
    font-weight: 600;
}

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

.skill-list li {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    color: var(--text-color);
}

.skill-list li::before {
    content: "▹";
    color: var(--secondary-color);
    margin-right: 0.8rem;
    font-size: 1.2rem;
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, var(--secondary-color), var(--accent-color));
}

.card {
    position: relative;
    margin-bottom: 2rem;
    padding: 2rem;
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
}

.card h3 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-size: 1.4rem;
}

.company {
    color: var(--text-color);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.location {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.description {
    margin-top: 1rem;
    color: var(--text-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .section {
        padding: 2rem 0;
    }

    .timeline::before {
        left: 0;
    }

    .card {
        margin-left: 20px;
    }

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