* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px; /* Mobilde kenarlardan taşmasın */
}

.login-container {
    background-color: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-header h2 {
    color: #333;
    margin-bottom: 5px;
    font-weight: 600;
}

.login-header p {
    color: #888;
    font-size: 14px;
    margin-bottom: 25px;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

    .form-group label {
        display: block;
        margin-bottom: 8px;
        color: #666;
        font-size: 14px;
        font-weight: 500;
    }

    .form-group input[type="text"],
    .form-group input[type="password"] {
        width: 100%;
        padding: 14px; /* Mobilde parmakla basmak kolay olsun diye büyüttük */
        border: 2px solid #eee;
        border-radius: 12px;
        outline: none;
        font-size: 16px; /* Mobilde zoom yapmaması için ideal boyut */
        transition: border-color 0.3s;
    }

    .form-group input:focus {
        border-color: #764ba2;
    }

/* Checkbox Tasarımı */
.checkbox-group {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    font-size: 14px;
    color: #666;
    cursor: pointer;
}

    .checkbox-group input {
        margin-right: 10px;
        width: 18px;
        height: 18px;
        accent-color: #764ba2;
    }

.btn-login {
    width: 100%;
    padding: 14px;
    background: linear-gradient(to right, #667eea, #764ba2);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.3s;
}

    .btn-login:hover {
        opacity: 0.9;
    }

.alert-error {
    background-color: #ffdddd;
    color: #d8000c;
    padding: 12px;
    border-radius: 10px;
    font-size: 14px;
    margin-bottom: 20px;
    border: 1px solid #ffcccc;
}

.footer-text {
    margin-top: 20px;
    font-size: 12px;
    color: #aaa;
}

/* MOBİL UYUMLULUK (Responsive) */
@media (max-width: 480px) {
    .login-container {
        padding: 30px 20px; /* Mobilde iç boşluğu azalttık */
    }

    .login-header h2 {
        font-size: 24px;
    }
}