:root {
    --bg-color: #020617;
    --text-color: #f8fafc;
    --primary-color: #10b981;
    --secondary-color: #3b82f6;
    --accent-color: #f59e0b;
    --card-bg: rgba(15, 23, 42, 0.4);
    --border-color: rgba(255, 255, 255, 0.08);
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.background-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
    opacity: 0.15;
}

nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.25rem 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background: rgba(2, 6, 23, 0.6);
    border-bottom: 1px solid var(--border-color);
}

nav .logo {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 101;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all 0.2s;
    opacity: 0.7;
}

nav a:hover {
    color: var(--primary-color);
    opacity: 1;
}

header {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 2rem;
    position: relative;
}

header .badge {
    background: rgba(16, 185, 129, 0.1);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 2rem;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

header h1 {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    margin-bottom: 1.5rem;
    letter-spacing: -0.05em;
    line-height: 1;
}

header h2 {
    font-size: clamp(1.25rem, 4vw, 2.25rem);
    font-weight: 400;
    color: #94a3b8;
    max-width: 800px;
    margin-bottom: 3rem;
}

.typing-container {
    height: 1.5em;
}

.typing {
    color: var(--primary-color);
    font-weight: 600;
}

section {
    padding: 10rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 4rem;
    letter-spacing: -0.025em;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.section-title::after {
    content: '';
    height: 1px;
    flex: 1;
    background: var(--border-color);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    border-radius: 1.5rem;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(16, 185, 129, 0.3);
    background: rgba(15, 23, 42, 0.6);
    box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.card h4 {
    color: var(--primary-color);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.date {
    font-size: 0.875rem;
    color: #64748b;
    margin-bottom: 1.5rem;
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-tag {
    background: rgba(255, 255, 255, 0.03);
    color: #cbd5e1;
    padding: 0.375rem 0.875rem;
    border-radius: 0.75rem;
    font-size: 0.8125rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.skill-tag:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

@media (max-width: 768px) {
    nav {
        padding: 1rem 1.5rem;
    }
    
    .menu-toggle {
        display: block;
    }

    nav ul {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: var(--bg-color);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        z-index: 100;
    }

    nav ul.active {
        display: flex;
    }

    nav a {
        font-size: 1.25rem;
        opacity: 1;
    }
    
    section {
        padding: 6rem 1.5rem;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
}