/* --- TEMEL SIFIRLAMA VE YAPI --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f6f8;
    color: #2c3e50;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- ÜST MENÜ (HEADER) --- */
header {
    background-color: #1a252f;
    padding: 20px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

header .logo a {
    color: #ffffff;
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
    letter-spacing: 1px;
}

header nav a {
    color: #ecf0f1;
    text-decoration: none;
    margin-left: 25px;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s ease;
}

header nav a:hover {
    color: #3498db;
}

/* --- ANA İÇERİK ALANI --- */
main {
    flex: 1; /* Footer'ı her zaman en alta iter */
    padding: 40px 50px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* --- ALT BİLGİ (FOOTER) --- */
footer {
    background-color: #bdc3c7;
    color: #34495e;
    text-align: center;
    padding: 25px;
    font-size: 14px;
}

/* --- ÜRÜN IZGARASI (VİTRİN İÇİN HAZIRLIK) --- */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.product-card {
    background: #ffffff;
    border: 1px solid #e0e6ed;
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}