:root {
    --primary-color: #e0e0e0;
    --secondary-color: #a0a0a0;
    --accent-color: #0070f3;
    --background-color: #121212;
    --card-background: #1e1e1e;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--primary-color);
    background-color: var(--background-color);
    overflow-x: hidden;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(30, 30, 30, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

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

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

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

.nav__menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav__link {
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition);
}

.nav__link:hover::after {
    width: 100%;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, #121212 0%, #1e1e1e 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(0, 112, 243, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(0, 112, 243, 0.1) 0%, transparent 50%);
    animation: gradient-shift 15s ease infinite;
}

@keyframes gradient-shift {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.hero__content {
    max-width: 800px;
    text-align: center;
    position: relative;
    z-index: 1;
    animation: fade-in-up 1s ease-out;
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero__name {
    color: var(--accent-color);
    position: relative;
}

.hero__name::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--accent-color);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
    animation: underline 2s ease-in-out infinite;
}

@keyframes underline {
    0%, 100% { transform: scaleX(0); }
    50% { transform: scaleX(1); }
}

.hero__subtitle {
    font-size: 1.25rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-lg);
    animation: fade-in-up 1s ease-out 0.2s both;
}

.hero__btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
    animation: fade-in-up 1s ease-out 0.4s both;
}

.hero__btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(0, 112, 243, 0.3);
}

.section {
    padding: var(--spacing-xl) var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.section__title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    text-align: center;
    position: relative;
}

.section__title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--accent-color);
    border-radius: 2px;
}

.about {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about__text {
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
    line-height: 1.8;
}

.skills__title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

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

.skill {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.skill::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.skill:hover::before {
    left: 100%;
}

.skill:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
    background-color: var(--accent-color);
    color: white;
    z-index: 1;
}

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

.project {
    background-color: var(--card-background);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
}

.project::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 112, 243, 0.1) 0%, rgba(0, 112, 243, 0) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.project:hover::before {
    opacity: 1;
}

.project:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.project__content {
    padding: var(--spacing-lg);
    position: relative;
    z-index: 1;
    transition: transform 0.3s ease;
}

.project:hover .project__content {
    transform: translateY(-5px);
}

.project__title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.project__description {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.project__link {
    display: inline-block;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
}

.project__link:hover {
    color: var(--primary-color);
}

.project__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition);
}

.project__link:hover::after {
    width: 100%;
}

.contact {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact__text {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.contact__links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
}

.contact__link {
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.contact__link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 112, 243, 0.1), transparent);
    transition: left 0.5s ease;
}

.contact__link:hover::before {
    left: 100%;
}

.contact__link:hover {
    color: var(--accent-color);
    background-color: rgba(0, 112, 243, 0.1);
    transform: translateY(-2px);
}

.contact__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
}

.contact__link:hover::after {
    width: 80%;
}

.footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.footer__text {
    font-size: 0.9rem;
    opacity: 0.8;
}

@media (max-width: 768px) {
    .nav__menu {
        display: none;
    }
    
    .hero__title {
        font-size: 2.5rem;
    }
    
    .hero__subtitle {
        font-size: 1rem;
    }
    
    .about {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .section {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .section__title {
        font-size: 2rem;
    }
    
    .projects {
        grid-template-columns: 1fr;
    }
    
    .contact__links {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .skills__list {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 2rem;
    }
    
    .hero__btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }
    
    .section__title {
        font-size: 1.75rem;
    }
    
    .about__text {
        font-size: 1rem;
    }
    
    .project__title {
        font-size: 1.25rem;
    }
    
    .project__description {
        font-size: 0.9rem;
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition);
}

.fade-in.active {
    opacity: 1;
    transform: translateY(0);
}