/* Γενικά */
body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    background: #f9f9f9;
    color: #444;
}

/* Header */
header {
    background: linear-gradient(135deg, #7B3FBF, #a768e0); /* gradient */
    text-align: center;
    padding: 30px 0;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.header-container {
    max-width: 1200px;
    margin: auto;
    padding: 0 20px;
}

/* Logo */
.logo {
    width: 100%;
    max-width: 400px;
    height: auto;
    display: block;
    margin: 0 auto 15px auto;
}

/* Header titles */
header h1 {
    color: white;
    font-size: 2.4rem;
    margin: 5px 0;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
}
header h2 {
    color: #e0d4f8;
    font-size: 1.3rem;
    margin: 5px 0 15px 0;
}

/* Navigation */
nav {
    background-color: #6b2fa0;
    border-top: 2px solid #8c4fd8;
    border-bottom: 2px solid #8c4fd8;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin: 0;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    padding: 10px 8px;
    display: inline-block;
    transition: all 0.3s;
    border-radius: 5px;
}

nav ul li a:hover {
    color: #7B3FBF;
    background-color: rgba(255, 255, 255, 0.15);
}

/* Main content */
main {
    padding: 30px 20px;
    max-width: 900px;
    margin: auto;
}

section {
    margin-bottom: 50px;
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 3px 8px rgba(0,0,0,0.08);
}

/* Section headers */
h3, h4 {
    color: #7B3FBF;
}

h3 {
    border-bottom: 2px solid #7B3FBF;
    padding-bottom: 5px;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

h4 {
    margin-top: 15px;
    margin-bottom: 5px;
    font-weight: bold;
}

/* About Section */
#about {
    text-align: center;
    color: #333;
}
#about img {
    max-width: 150px;
    border-radius: 50%;
    border: 4px solid #7B3FBF;
    margin: 20px 0;
}
#about p {
    max-width: 700px;
    margin: 10px auto;
    font-size: 1rem;
    line-height: 1.5;
}

/* Education & Experience */
#education p,
#experience p {
    margin: 5px 0 12px 0;
    font-size: 0.95rem;
    line-height: 1.5;
    color: #555;
}

/* Seminars */
#seminars {
    background: #fdf4ff;
    padding: 25px;
    border-radius: 10px;
}
#seminars h4 {
    font-size: 1.05rem;
    margin-top: 15px;
    margin-bottom: 5px;
}
#seminars p {
    font-size: 0.9rem;
    margin: 2px 0 8px 0;
    line-height: 1.4;
}
.seminars-list {
    list-style: none;
    padding: 0;
}
.seminars-list li {
    margin-bottom: 15px;
    padding: 12px;
    border-left: 4px solid #7B3FBF;
    background: #f9e9ff;
    border-radius: 8px;
}

/* Contact */
#contact {
    padding: 25px;
    background: #fdf4ff;
    border-radius: 10px;
}
#contact ul {
    list-style: none;
    padding: 0;
}
#contact li {
    margin: 10px 0;
    font-size: 1.05rem;
}
#contact a {
    color: #7B3FBF;
    text-decoration: none;
}
#contact a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    background-color: #eee;
    color: #333;
    border-top: 1px solid #ccc;
    font-size: 0.95rem;
}

/* Responsive */
@media screen and (max-width: 1024px) {
    .logo {
        max-width: 300px;
    }
}

@media screen and (max-width: 768px) {
    .logo {
        max-width: 220px;
    }
    nav ul li {
        margin: 5px 10px;
    }
}

@media screen and (max-width: 480px) {
    .logo {
        max-width: 100%;
        margin-bottom: 15px;
    }
    nav ul {
        flex-direction: column;
        padding: 0;
    }
    nav ul li {
        margin: 5px 0;
    }
    main {
        padding: 15px 10px;
    }
    section {
        padding: 15px;
    }
}