:root {
    --primary-color: #4a90e2;
    --error-color: #e74c3c;
    --success-color: #2ecc71;
    --bg-color: #f4f7f6;
    --navbar-bg: #333;
    --navbar-text: #fff;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    /* Flex yapısını navbar için değiştirdik */
    display: flex;
    flex-direction: column; 
    margin: 0;
    min-height: 100vh;
}

/* --- NAVBAR (ÜST BAR) --- */
.navbar {
    background-color: var(--navbar-bg);
    color: var(--navbar-text);
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-size: 1.2rem;
    font-weight: bold;
    color: #fff;
    text-decoration: none;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    color: #ccc;
    text-decoration: none;
    font-size: 0.9rem;
}
.nav-link:hover { color: #fff; }

.btn-logout-nav {
    background-color: var(--error-color);
    padding: 5px 10px;
    border-radius: 4px;
    color: white;
    text-decoration: none;
    font-size: 0.85rem;
}

/* --- CUSTOM DROPDOWN (DİL SEÇİMİ) --- */
.lang-dropdown {
    position: relative;
    display: inline-block;
}

.lang-btn {
    background-color: #444;
    color: white;
    padding: 8px 15px;
    font-size: 0.9rem;
    border: 1px solid #555;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 140px;
    justify-content: space-between;
}

.lang-btn:hover { background-color: #555; }

/* Dropdown İçeriği */
.dropdown-content {
    display: none; /* JS ile açılacak */
    position: absolute;
    right: 0;
    background-color: #fff;
    min-width: 100%;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 100;
    border-radius: 4px;
    margin-top: 5px;
    overflow: hidden;
}

.dropdown-content a {
    color: #333;
    padding: 10px 12px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    border-bottom: 1px solid #f1f1f1;
}

.dropdown-content a:last-child { border-bottom: none; }
.dropdown-content a:hover { background-color: #f1f1f1; }
.dropdown-content.show { display: block; }

/* --- LOGIN CONTAINER --- */
/* Navbar olduğu için login kutusunu ortalamak için margin kullanıyoruz */
.login-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.login-container {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

h2 { text-align: center; color: #333; margin-bottom: 1.5rem; }
.form-group { margin-bottom: 1rem; }
label { display: block; margin-bottom: 0.5rem; color: #666; }
input { width: 100%; padding: 10px; border: 1px solid #ddd; border-radius: 4px; box-sizing: border-box; }

button {
    width: 100%;
    padding: 10px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}
button:hover { background-color: #357abd; }

.message {
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 4px;
    display: none;
    text-align: center;
    font-size: 0.9rem;
}
.message.error { background-color: #fadbd8; color: var(--error-color); border: 1px solid #f1948a; }
.message.success { background-color: #d4efdf; color: var(--success-color); border: 1px solid #82e0aa; }
.captcha-wrapper { display: flex; gap: 10px; }
.captcha-wrapper img { cursor: pointer; border: 1px solid #ddd; border-radius: 4px; }