body {
    font-family: 'Segoe UI', Tahoma, Verdana, sans-serif;
    background-color: #f0f2f5;
    color: #333;
    margin: 0;
    padding: 0;
}

/* HEADER (ÜST BİLGİ) TASARIMI */
header {
    background-color: #1a237e;
    color: white;
    text-align: center;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

nav a {
    color: #ffd54f;
    text-decoration: none;
    font-weight: bold;
    font-size: 18px;
    margin: 0 10px;
}
nav a:hover { color: #ffffff; }

/* MAIN (ANA İÇERİK) TASARIMI - Flexbox ile yan yana getirme */
main {
    display: flex; /* İçindeki article ve aside'ı yan yana dizer! */
    max-width: 1000px;
    margin: 30px auto; /* Sayfayı ortalar */
    gap: 20px; /* Kutular arası boşluk */
    padding: 0 20px;
}

/* ARTICLE (MAKALE) TASARIMI */
article {
    flex: 3; /* Ekranın 3 birimini kaplar */
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

/* FIGURE VE RESİM TASARIMI */
figure {
    margin: 0;
    padding: 0;
}
img {
    border-radius: 8px;
}
figcaption {
    text-align: center;
    font-style: italic;
    color: #777;
    margin-top: 10px;
}

/* ASIDE (YAN ÇUBUK) TASARIMI */
aside {
    flex: 1; /* Ekranın 1 birimini kaplar (Daha dar olur) */
    background-color: #e3f2fd;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid #1a237e;
    height: fit-content;
}

/* FOOTER (ALT BİLGİ) TASARIMI */
footer {
    background-color: #1a237e;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 40px;
}