/* Genel ayarlar */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background: #f5f5f5; /* Soft açık gri */
    color: #333;
}

/* Container */
.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

/* Header */
header {
    background: linear-gradient(135deg, #3b3b98, #5a4bcf); /* Lacivert-mor degrade */
    color: white;
    padding: 60px 0;
    text-align: center;
    border-bottom-left-radius: 20px;
    border-bottom-right-radius: 20px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

header h1 {
    margin: 0;
    font-size: 3rem;
    background: -webkit-linear-gradient(#8e44ad, #3498db);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.15);
}

header p {
    margin-top: 12px;
    font-size: 1.2rem;
    color: #e0e0e0;
}

/* Navigasyon */
nav {
    background-color: #2c3e50; /* Daha soft lacivert */
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 12px 0;
    text-align: center;
}

nav ul li {
    display: inline-block;
    margin: 0 20px;
}

nav ul li a {
    color: #ecf0f1;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.05rem;
    position: relative;
    transition: 0.3s;
}

nav ul li a::after {
    content: '';
    display: block;
    width: 0;
    height: 2px;
    background: #8e44ad;
    transition: width .3s;
    position: absolute;
    bottom: -5px;
    left: 0;
}

nav ul li a:hover::after {
    width: 100%;
}

nav ul li a:hover {
    color: #8e44ad;
}

/* Ana içerik */
main {
    padding: 40px 0;
}

/* Başlıklar */
section h2 {
    color: #3b3b98;
    margin-bottom: 25px;
    font-size: 2rem;
    background: linear-gradient(to right, #5a4bcf, #3b3b98);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

/* Kartlar */
.cards {
    display: flex;
    flex-wrap: wrap;
    gap: 25px;
    margin-top: 20px;
}

.card {
    background: #ffffff;
    border-radius: 15px;
    padding: 25px;
    flex: 1 1 260px;
    box-shadow: 0 12px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 25px rgba(0,0,0,0.2);
}

.card h3 {
    margin-top: 0;
    color: #5a4bcf;
}

.card p {
    margin: 12px 0;
    color: #4b4b4b;
    line-height: 1.6;
}

.card a {
    display: inline-block;
    margin-top: 15px;
    text-decoration: none;
    color: #3498db;
    font-weight: bold;
    transition: 0.3s;
}

.card a:hover {
    text-decoration: underline;
    color: #2c3e50;
}

/* Liste sayfaları */
section ul {
    list-style-type: disc;
    padding-left: 25px;
}

section ul li {
    margin-bottom: 12px;
    font-size: 1.1rem;
}

/* Footer */
footer {
    background: linear-gradient(135deg, #3b3b98, #5a4bcf);
    color: #ecf0f1;
    text-align: center;
    padding: 25px 0;
    margin-top: 40px;
    box-shadow: 0 -6px 15px rgba(0,0,0,0.15);
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
}

/* Mobil uyumlu */
@media (max-width: 768px) {
    nav ul li {
        display: block;
        margin: 8px 0;
    }
    .cards {
        flex-direction: column;
    }
    header h1 {
        font-size: 2.2rem;
    }
    section h2 {
        font-size: 1.6rem;
    }
}