* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', sans-serif; }

body {
    background: linear-gradient(135deg, #0a0a0a, #1a1a1a);
    color: #f5f5f5;
    min-height: 100vh;
}

header {
    background: linear-gradient(90deg, #111, #222);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

header h1 { font-size: 1.8rem; letter-spacing: 1px; }

nav {
    display: flex;
    gap: 0.5rem;
}

nav button {
    background: #333;
    border: none;
    color: #f5f5f5;
    padding: 0.5rem 1rem;
    cursor: pointer;
    border-radius: 5px;
    transition: 0.2s all;
}

nav button:hover { background: #555; }

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: #f5f5f5;
    border-radius: 2px;
}

@media(max-width: 768px) {
    nav { display: none; flex-direction: column; width: 100%; }
    nav.active { display: flex; }
    .menu-toggle { display: flex; }
}

main { padding: 3rem; max-width: 1400px; margin: auto; }

section { display: none; animation: fadeIn 0.3s ease-in-out; }
section.active { display: block; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.profile {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 3rem;
    background: linear-gradient(135deg, #111, #222);
    padding: 3rem 2rem;
    border-radius: 15px;
    margin-bottom: 3rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.profile img { width: 200px; height: 200px; border-radius: 50%; object-fit: cover; border: 3px solid #777; margin-bottom: 1rem; }

.profile-info h2 { font-size: 3rem; margin-bottom: 1.5rem; font-weight: 300; letter-spacing: 1px; }
.profile-info h4 { font-size: 1.5rem; margin-bottom: 0.5rem; font-weight: 300; }
.profile-info p { margin-bottom: 1.5rem; line-height: 1.6; max-width: 700px; }
.profile-info ul { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }
.profile-info ul li { background: linear-gradient(135deg, #333, #555); padding: 0.5rem 1rem; border-radius: 20px; font-size: 0.9rem;     }

.project-category { margin-bottom: 2rem; }
.project-category h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid #555;
    padding-bottom: 0.3rem;
}

.project-container { display: grid; grid-template-columns: repeat(auto-fit,minmax(280px,1fr)); gap: 1rem; }

.project {
    background: linear-gradient(135deg, #1a1a1a, #111);
    padding: 1rem;
    border-radius: 8px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.project:hover { transform: translateY(-5px); box-shadow: 0 0 15px #222; }

.project h4 { font-size: 1.2rem; margin-bottom: 0.3rem; }
.project p { margin-bottom: 0.5rem; }

.project button {
    background: linear-gradient(135deg, #333, #111);
    border: none;
    color: #f5f5f5;
    padding: 0.3rem 0.7rem;
    border-radius: 4px;
    cursor: pointer;
    transition: 0.2s all;
    margin-right: 0.3rem;
    margin-top: 0.5rem;
}

.project button:hover { background: linear-gradient(135deg, #555, #222); }

.specializations, .languages {
    text-align: center;
    padding: 2rem 0;
}

.specializations h3, .languages h3 { font-size: 1.8rem; margin-bottom: 1rem; font-weight: 300; }
.specializations ul, .languages ul { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }
.specializations ul li, .languages ul li { background: linear-gradient(135deg, #333, #555); padding: 0.5rem 1rem; border-radius: 20px; font-size: 0.9rem; }
.contact-container {
    text-align: center;
    background: linear-gradient(135deg, #111, #222);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.contact-container h3 { font-size: 2rem; margin-bottom: 1.5rem; font-weight: 300; }

.contact {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.contact a {
    display: inline-block;
    background: linear-gradient(135deg, #333, #111);
    padding: 1rem 2rem;
    color: #f5f5f5;
    border-radius: 8px;
    text-decoration: none;
    transition: 0.2s all;
    font-size: 1.1rem;
}

.contact a:hover { background: linear-gradient(135deg, #555, #222); transform: translateY(-2px); }